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Benchmark run task-12-strengthened-readwrite-20260929

Benchmark run task-12-strengthened-readwrite-20260929

This page contains exactly the publishable benchmark observations recorded in run task-12-strengthened-readwrite-20260929; it does not select or aggregate them. Return to the run index or view aggregate metrics.

Interactive browser

Rows are pre-aggregated by task, target, prompt variant, MCP-instruction mode, context, arm, and restriction. Numeric values show median (p50), IQR, p90, maximum, and sample count. Boolean checks show pass counts and success rates. Filters apply to these summary groups; per-run observations remain available on their run pages.

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Baseline vs semedit

Comparison evaluates baseline and semedit values within each restriction policy, target, and context group. Negative changes mark improvements for these lower-is-better metrics; positive changes mark degradations.

Detailed observations

Empirical telemetry measuring wall-clock latency, token usage, tool turns, and compiler correctness when AI coding agents perform code modifications.

Every benchmark pairs Vanilla LLM (standard file editing tools) against Semedit MCP (deterministic AST compiler operations).

Benchmark Methodology & Transparency

  • Reproducibility & Provenance: Self-contained txtar archives define test scenarios. Links below resolve to commit-anchored GitHub source files for published commits, or cryptographic SHA-256 fingerprints for uncommitted local fixtures.
  • Model Cost: Tables report model-specific credit consumption where a target model has a declared schedule: (uncached input × input credits + cached input × cached credits + (reasoning + visible output) × output credits) / 1,000,000. Thinking tokens use the output rate. ADR-0043 defines the per-million-token credit rates.
  • Multi-Level Correctness Oracle: Four validation levels evaluate each trial:
    1. Level 1 (Mutation Policy): Restricts file modifications strictly to authorized paths.
    2. Level 2 (AST Invariants): Compiler AST verification of required symbols, imports, and relative declaration ordering.
    3. Level 3 (Clean Build): Strict compilation validation with zero compiler or typecheck errors.
    4. Level 4 (Test Suite): Unit and integration test suite execution.
  • Isolated Sandboxing: Each trial executes in an ephemeral directory with pristine git and module state.

Test case: task-12-request-identity-migration

Target: codex/gpt-6-luna/medium

default prompt · prescriptive MCP instructions · readwrite semedit restriction

SettingValue
Test casetask-12-request-identity-migration
Targetcodex/gpt-6-luna/medium
Prompt variantdefault
MCP server instructionsprescriptive
Semedit arm restrictionreadwrite
Fixturetestdata/bench/task_12_request_identity_migration.txtar

Vanilla LLM Prompt:

You are forbidden to modify protected files: “go.mod”, “go.sum”.

Migrate the request identity API in this large multi-package Go service. Rename only Request.ID to Request.RequestID and update every semantic use across packages; Response.ID and Review.ID are separate identities and must remain unchanged, including the many syntactically identical r.ID expressions. Add a package sentinel ErrInvalidRequest and return it from Validate when the request ID is empty, preserving error wrapping and callers. Extract the normalization block from the existing exported request.Normalize function into an unexported normalizeKind helper and keep Normalize exported with the same behavior and signature. Preserve module metadata and existing tests. Verification differs by editing method: when making ordinary file edits, run the project build and tests and ensure both pass; when using semedit, treat clean compiler diagnostic deltas returned by its mutation commands as build-clean evidence and do not run a separate build or test command. Do not use semantic editing MCP tools; use standard file editing. When done, output DONE.

Semedit MCP Prompt:

You are forbidden to modify protected files: “go.mod”, “go.sum”.

Migrate the request identity API in this large multi-package Go service. Rename only Request.ID to Request.RequestID and update every semantic use across packages; Response.ID and Review.ID are separate identities and must remain unchanged, including the many syntactically identical r.ID expressions. Add a package sentinel ErrInvalidRequest and return it from Validate when the request ID is empty, preserving error wrapping and callers. Extract the normalization block from the existing exported request.Normalize function into an unexported normalizeKind helper and keep Normalize exported with the same behavior and signature. Preserve module metadata and existing tests. Verification differs by editing method: when making ordinary file edits, run the project build and tests and ensure both pass; when using semedit, treat clean compiler diagnostic deltas returned by its mutation commands as build-clean evidence and do not run a separate build or test command. Do not inspect Go implementation files (non-test .go) with shell commands such as cat, sed, or rg. Use semantic code inspection tools for those files. Reading project documentation (docs/.md), build manifests (go.mod, Makefile), and visible test files in the task workspace is permitted. Use semedit semantic tools for supported source code modifications. Shell commands for builds and tests are allowed. When done, output DONE.

Initial Workspace State (Before Edit)
package request

import (
	"errors"
	"strings"
)

type Request struct {
	ID      string
	Kind    string
	Payload []byte
}

func (r Request) Validate() error {
	if r.ID == "" {
		return errors.New("invalid request")
	}
	return nil
}

func Normalize(kind string) string {
	kind = strings.TrimSpace(kind)
	kind = strings.ToLower(kind)
	return kind
}

func FindByID(requests []Request, id string) (Request, bool) {
	for _, r := range requests {
		if r.ID == id {
			return r, true
		}
	}
	return Request{}, false
}
MetricVanilla (Small)MCP (Small)Δ (Small)Vanilla (Large)MCP (Large)Δ (Large)
Wall-Clock Latency87.12s103.39s+18.7%58.40s155.44s+166.2%
Process Start → First Event1.07s0.56s—0.14s0.15s—
First Event → First Tool Call12.62s10.77s—4.96s9.25s—
MCP Initialize → First Semantic Call——————
MCP Server Start → Initialize——————
Top-Level User Turns110%110%
Internal Tool Cycles718+157.1%823+187.5%
Initial Load / Discovery Turns35+66.7%330%
MCP Discovery / Schema Turns00—00—
Tool Invocations (per run)718+157.1%823+187.5%
Output Tokens23491699-27.7%20541958-4.7%
Reasoning / Thinking Tokens546663+21.4%669764+14.2%
Total Input Tokens205688393618+91.4%198676449873+126.4%
Cached Input Tokens186112352256+89.3%180992415232+129.4%
Uncached Input Tokens1957641362+111.3%1768434641+95.9%
Cost0.13170.2210+67.9%0.12350.2244+81.7%
Cached vs Uncached Token Ratio9.51:18.52:1-10.4%10.23:111.99:1+17.1%
Oracle L1: Mutation PolicyPASSPASS—PASSPASS—
Oracle L2: AST InvariantsPASSPASS—PASSPASS—
Oracle L3: Clean BuildPASSPASS—PASSPASS—
Oracle L4: Verification TestPASSPASS—PASSPASS—
Semantic Tool Invocation Verified (per run)N/APASS—N/APASS—
Baseline vs Semedit Agentic in Small Context
  • Vanilla (Baseline vs Semedit Agentic in Small Context) Edit: File request/request.go modified (34 lines -> 40 lines)
  • Semedit MCP (Baseline vs Semedit Agentic in Small Context) Edit: File request/request.go modified (34 lines -> 40 lines)
#VanillaSemedit MCP
1✓ ✓
/bin/zsh -lc "pwd && \
rg --files -g 'AGENTS.md' -g 'PROJECT_BRIEF.md' -g 'go.mod' -g 'go.sum' -g '*.go' | head -200"
? ✗
/bin/zsh -lc 'cat docs/README.md'
2✓ ✓
/bin/zsh -lc "cat go.mod && \
cat request/request.go && \
cat request/request_test.go && \
rg -n '\\bRequest\\b|\\.ID\\b|Request\\.ID|Normalize|Validate' --glob '*.go'"
✓ ✓
/bin/zsh -lc "git status --short && \
rg --files -g '*.go' -g 'Makefile' -g 'go.mod' | head -100"
3✓ ✓
/bin/zsh -lc "rg -n 'Request\\{' --glob '*.go'; rg -n 'r\\.ID|Request\\.ID|left\\.Request\\.ID|job\\.Request\\.ID' --glob '*.go'; rg --files"
? ✗
/bin/zsh -lc 'cat Makefile && \
cat go.mod'
4? ✗
/bin/zsh -lc "python3 - <<'PY'
from pathlib import Path
import os, tempfile
changes = {
'request/request.go': [
('\"errors\"', '\"errors\"'),
'ID      string', 'RequestID string',
'r.ID', 'r.RequestID',
'errors.New(\"invalid request\")', 'ErrInvalidRequest',
'func Normalize(kind string) string {\\n\\tkind = strings.TrimSpace(kind)\\n\\tkind = strings.ToLower(kind)\\n\\treturn kind\\n}', 'func Normalize(kind string) string {\\n\\treturn normalizeKind(kind)\\n}\\n\\nfunc normalizeKind(kind string) string {\\n\\tkind = strings.TrimSpace(kind)\\n\\tkind = strings.ToLower(kind)\\n\\treturn kind\\n}'
],
'gateway/handler.go': [('r.ID','r.RequestID')],
'notifications/notifier.go': [('r.ID','r.RequestID'), ('r.Request.ID','r.Request.RequestID')],
'queue/queue.go': [('r.ID','r.RequestID')],
'scheduler/jobs.go': [('left.Request.ID','left.Request.RequestID'), ('right.Request.ID','right.Request.RequestID'), ('job.Request.ID','job.Request.RequestID'), ('r.ID','r.RequestID')],
'correlation/identities.go': [('r.ID','r.RequestID')],
'storage/requests.go': [('r.ID','r.RequestID')],
'reporting/report.go': [('r.Request.ID','r.Request.RequestID')],
}
for name, replacements in changes.items():
    path=Path(name)
    data=path.read_text()
    if name == 'request/request.go':
        data=data.replace('type Request struct {', 'var ErrInvalidRequest = errors.New(\"invalid request\")\\n\\ntype Request struct {')
    for i in range(0,len(replacements),2):
        old,new=replacements[i:i+2]
        if old not in data:
            raise SystemExit(f'missing expected text {old"'!r} in {name}'"')
        data=data.replace(old,new)
    fd,tmp=tempfile.mkstemp(prefix=path.name+'.', dir=path.parent)
    try:
        with os.fdopen(fd,'w') as f:
            f.write(data); f.flush(); os.fsync(f.fileno())
        os.replace(tmp,path)
    finally:
        if os.path.exists(tmp): os.unlink(tmp)
PY
"
✓ ✓
/bin/zsh -lc "rg --files -g '*.md' -g 'Makefile' -g 'go.mod' | head -80"
5✓ ✓
/bin/zsh -lc "python3 - <<'PY'
from pathlib import Path
import os, tempfile
changes = {
'request/request.go': [
('ID      string', 'RequestID string'), ('r.ID', 'r.RequestID'), ('errors.New(\"invalid request\")', 'ErrInvalidRequest'),
('func Normalize(kind string) string {\\n\\tkind = strings.TrimSpace(kind)\\n\\tkind = strings.ToLower(kind)\\n\\treturn kind\\n}', 'func Normalize(kind string) string {\\n\\treturn normalizeKind(kind)\\n}\\n\\nfunc normalizeKind(kind string) string {\\n\\tkind = strings.TrimSpace(kind)\\n\\tkind = strings.ToLower(kind)\\n\\treturn kind\\n}')],
'gateway/handler.go': [('r.ID','r.RequestID')],
'notifications/notifier.go': [('r.ID','r.RequestID'), ('r.Request.ID','r.Request.RequestID')],
'queue/queue.go': [('r.ID','r.RequestID')],
'scheduler/jobs.go': [('left.Request.ID','left.Request.RequestID'), ('right.Request.ID','right.Request.RequestID'), ('job.Request.ID','job.Request.RequestID'), ('r.ID','r.RequestID')],
'correlation/identities.go': [('r.ID','r.RequestID')],
'storage/requests.go': [('r.ID','r.RequestID')],
'reporting/report.go': [('r.Request.ID','r.Request.RequestID')],
}
for name, replacements in changes.items():
    path=Path(name); data=path.read_text()
    for old,new in replacements:
        if old not in data: raise SystemExit(f'missing expected text {old"'!r} in {name}'"')
        data=data.replace(old,new)
    if name == 'request/request.go':
        data=data.replace('type Request struct {', 'var ErrInvalidRequest = errors.New(\"invalid request\")\\n\\ntype Request struct {')
    fd,tmp=tempfile.mkstemp(prefix=path.name+'.', dir=path.parent)
    try:
        with os.fdopen(fd,'w') as f: f.write(data); f.flush(); os.fsync(f.fileno())
        os.replace(tmp,path)
    finally:
        if os.path.exists(tmp): os.unlink(tmp)
PY
gofmt -w request/request.go gateway/handler.go notifications/notifier.go queue/queue.go scheduler/jobs.go correlation/identities.go storage/requests.go reporting/report.go
"
✓ ✓
/bin/zsh -lc 'cat docs/identity-model.md && \
cat go.mod'
6✓ ✓
/bin/zsh -lc 'git diff --check && \
git diff -- go.mod go.sum && \
git diff -- && \
go build ./... && \
go test ./...'
semedit/semantic_lookup (✓ ✓)
{
  "symbol": "Request"
}
7✓ ✓
/bin/zsh -lc "git status --short && \
git diff -- request/request.go gateway/handler.go notifications/notifier.go queue/queue.go scheduler/jobs.go correlation/identities.go storage/requests.go reporting/report.go && \
rg -n '\\.ID\\b|RequestID|ErrInvalidRequest|normalizeKind' --glob '*.go'"
semedit/semantic_inspect_symbol (✓ ✓)
{
  "file": "request/request.go",
  "symbol": "Request"
}
8—semedit/semantic_lookup (✓ ✓)
{
  "symbol": "Normalize"
}
9—semedit/semantic_lookup (✓ ✓)
{
  "symbol": "Validate"
}
10—semedit/semantic_inspect_symbol (✓ ✓)
{
  "file": "request/request.go",
  "symbol": "Normalize"
}
11—semedit/semantic_lookup (✓ ✓)
{
  "symbol": "Request.ID"
}
12—semedit/semantic_inspect_symbol (✓ ✓)
{
  "file": "request/request.go",
  "symbol": "Request.Validate"
}
13—semedit/semantic_rename (✓ ✓)
{
  "symbol": "Request.ID",
  "to": "RequestID"
}
14—semedit/semantic_batch (✓ ✓)
{
  "edits": [
    {
      "params": {
        "file": "request/request.go",
        "group": "append",
        "source": "var ErrInvalidRequest = errors.New(\"invalid request\")"
      },
      "tool": "semantic_insert_decl"
    },
    {
      "params": {
        "file": "request/request.go",
        "placement": "private_start",
        "source": "func normalizeKind(kind string) string {\n\tkind = strings.TrimSpace(kind)\n\tkind = strings.ToLower(kind)\n\treturn kind\n}"
      },
      "tool": "semantic_insert_function"
    },
    {
      "params": {
        "body": "return normalizeKind(kind)",
        "file": "request/request.go",
        "symbol": "Normalize"
      },
      "tool": "semantic_replace_body"
    },
    {
      "params": {
        "body": "if r.RequestID == \"\" {\n\t\treturn ErrInvalidRequest\n\t}\n\treturn nil",
        "file": "request/request.go",
        "symbol": "Request.Validate"
      },
      "tool": "semantic_replace_body"
    }
  ]
}
15—semedit/semantic_find_references (✓ ✓)
{
  "file": "request/request.go",
  "symbol": "Request.RequestID"
}
16—semedit/semantic_lookup (✓ ✓)
{
  "symbol": "Response.ID"
}
17—semedit/semantic_lookup (✓ ✓)
{
  "symbol": "Review.ID"
}
18—semedit/semantic_inspect_symbol (✓ ✓)
{
  "file": "request/request.go",
  "symbol": "Request"
}
Baseline vs Semedit Agentic in Large Context
  • Vanilla (Baseline vs Semedit Agentic in Large Context) Edit: File request/request.go modified (34 lines -> 40 lines)
  • Semedit MCP (Baseline vs Semedit Agentic in Large Context) Edit: File request/request.go modified (34 lines -> 40 lines)
#VanillaSemedit MCP
1✓ ✓
/bin/zsh -lc "pwd && \
rg --files -g 'PROJECT_BRIEF.md' -g 'go.mod' -g '*.go' -g 'AGENTS.md' | head -200"
✓ ✓
/bin/zsh -lc "rg --files -g 'PROJECT_BRIEF.md' -g 'docs/*.md' -g 'Makefile' -g 'go.mod' -g '*_test.go' | head -80"
2✓ ✓
/bin/zsh -lc "cat go.mod && \
rg -n '\\b(ID|RequestID)\\b|Normalize|Validate|ErrInvalid' --glob '*.go' . && \
rg --files"
? ✗
/bin/zsh -lc 'cat docs/identity-model.md && \
cat Makefile && \
cat go.mod && \
cat request/request_test.go'
3✓ ✓
/bin/zsh -lc 'cat request/request.go; cat request/request_test.go; cat gateway/handler.go; cat storage/requests.go; cat storage/requests_test.go; cat docs/identity-model.md; cat api/router.go; cat review/review.go; cat response/response.go'
✓ ✓
/bin/zsh -lc "rg --files | head -60; rg --files -g '*_test.go' | xargs -I{} sh -c 'echo === {}; cat \""'$1"'"' _ {}"
4file_change (✓ ✓)semedit/semantic_lookup (✓ ✗): resolve request.Request: symbol not found
{
  "symbol": "request.Request"
}
5✓ ✓
/bin/zsh -lc 'cat notifications/notifier.go; cat reporting/report.go; cat queue/queue.go; cat scheduler/jobs.go; cat correlation/identities.go; cat models/models.go'
semedit/semantic_lookup (✓ ✓)
{
  "symbol": "Normalize"
}
6file_change (✓ ✓)semedit/semantic_lookup (✓ ✓)
{
  "symbol": "Request.Validate"
}
7✓ ✓
/bin/zsh -lc "gofmt -w request/request.go gateway/handler.go notifications/notifier.go reporting/report.go queue/queue.go scheduler/jobs.go correlation/identities.go storage/requests.go && \
rg -n '\\.ID|RequestID|normalizeKind|ErrInvalidRequest' --glob '*.go' . && \
go test ./..."
semedit/semantic_lookup (✓ ✓)
{
  "symbol": "FindByID"
}
8✓ ✓
/bin/zsh -lc 'go build ./... && \
git diff --check && \
git status --short && \
git diff -- go.mod go.sum'
semedit/semantic_inspect_symbol (✓ ✓)
{
  "file": "request/request.go",
  "symbol": "Normalize"
}
9—semedit/semantic_inspect_symbol (✓ ✓)
{
  "file": "request/request.go",
  "symbol": "Request.Validate"
}
10—semedit/semantic_inspect_symbol (✓ ✓)
{
  "file": "request/request.go",
  "symbol": "Request"
}
11—semedit/semantic_lookup (✓ ✓)
{
  "file": "request/request.go",
  "symbol": "Request.ID"
}
12—semedit/semantic_rename (✓ ✓)
{
  "file": "request/request.go",
  "symbol": "Request.ID",
  "to": "RequestID"
}
13—semedit/semantic_insert_decl (✓ ✓)
{
  "file": "request/request.go",
  "source": "var ErrInvalidRequest = errors.New(\"invalid request\")"
}
14—semedit/semantic_replace_body (✓ ✓)
{
  "body": "if r.RequestID == \"\" {\n\t\treturn ErrInvalidRequest\n\t}\n\treturn nil",
  "file": "request/request.go",
  "symbol": "Request.Validate"
}
15—semedit/semantic_replace_body (✓ ✓)
{
  "body": "return normalizeKind(kind)",
  "file": "request/request.go",
  "symbol": "Normalize"
}
16—semedit/semantic_insert_function (✓ ✓)
{
  "access_modifier": "private",
  "file": "request/request.go",
  "placement": "private_end",
  "source": "func normalizeKind(kind string) string {\n\tkind = strings.TrimSpace(kind)\n\tkind = strings.ToLower(kind)\n\treturn kind\n}"
}
17—semedit/semantic_inspect_symbol (✓ ✓)
{
  "file": "request/request.go",
  "symbol": "Request"
}
18—semedit/semantic_inspect_symbol (✓ ✓)
{
  "file": "request/request.go",
  "symbol": "Request.Validate"
}
19—semedit/semantic_inspect_symbol (✓ ✓)
{
  "file": "request/request.go",
  "symbol": "Normalize"
}
20—semedit/semantic_inspect_symbol (✓ ✓)
{
  "file": "request/request.go",
  "symbol": "normalizeKind"
}
21—semedit/semantic_find_references (✓ ✓)
{
  "file": "request/request.go",
  "symbol": "Request.RequestID"
}
22—✓ ✓
/bin/zsh -lc 'git status --short -- go.mod go.sum request/request.go gateway api storage response review'
23—semedit/semantic_inspect_symbol (✓ ✓)
{
  "file": "request/request.go",
  "symbol": "ErrInvalidRequest"
}

default prompt · prescriptive MCP instructions · readwrite semedit restriction

SettingValue
Test casetask-12-request-identity-migration
Targetcodex/gpt-6-luna/medium
Prompt variantdefault
MCP server instructionsprescriptive
Semedit arm restrictionreadwrite
Fixturetestdata/bench/task_12_request_identity_migration.txtar

Vanilla LLM Prompt:

You are forbidden to modify protected files: “go.mod”, “go.sum”.

Migrate the request identity API in this large multi-package Go service. Rename only Request.ID to Request.RequestID and update every semantic use across packages; Response.ID and Review.ID are separate identities and must remain unchanged, including the many syntactically identical r.ID expressions. Add a package sentinel ErrInvalidRequest and return it from Validate when the request ID is empty, preserving error wrapping and callers. Extract the normalization block from the existing exported request.Normalize function into an unexported normalizeKind helper and keep Normalize exported with the same behavior and signature. Preserve module metadata and existing tests. Verification differs by editing method: when making ordinary file edits, run the project build and tests and ensure both pass; when using semedit, treat clean compiler diagnostic deltas returned by its mutation commands as build-clean evidence and do not run a separate build or test command. Do not use semantic editing MCP tools; use standard file editing. When done, output DONE.

Semedit MCP Prompt:

You are forbidden to modify protected files: “go.mod”, “go.sum”.

Migrate the request identity API in this large multi-package Go service. Rename only Request.ID to Request.RequestID and update every semantic use across packages; Response.ID and Review.ID are separate identities and must remain unchanged, including the many syntactically identical r.ID expressions. Add a package sentinel ErrInvalidRequest and return it from Validate when the request ID is empty, preserving error wrapping and callers. Extract the normalization block from the existing exported request.Normalize function into an unexported normalizeKind helper and keep Normalize exported with the same behavior and signature. Preserve module metadata and existing tests. Verification differs by editing method: when making ordinary file edits, run the project build and tests and ensure both pass; when using semedit, treat clean compiler diagnostic deltas returned by its mutation commands as build-clean evidence and do not run a separate build or test command. Do not inspect Go implementation files (non-test .go) with shell commands such as cat, sed, or rg. Use semantic code inspection tools for those files. Reading project documentation (docs/.md), build manifests (go.mod, Makefile), and visible test files in the task workspace is permitted. Use semedit semantic tools for supported source code modifications. Shell commands for builds and tests are allowed. When done, output DONE.

Initial Workspace State (Before Edit)
package request

import (
	"errors"
	"strings"
)

type Request struct {
	ID      string
	Kind    string
	Payload []byte
}

func (r Request) Validate() error {
	if r.ID == "" {
		return errors.New("invalid request")
	}
	return nil
}

func Normalize(kind string) string {
	kind = strings.TrimSpace(kind)
	kind = strings.ToLower(kind)
	return kind
}

func FindByID(requests []Request, id string) (Request, bool) {
	for _, r := range requests {
		if r.ID == id {
			return r, true
		}
	}
	return Request{}, false
}
MetricVanilla (Small)MCP (Small)Δ (Small)Vanilla (Large)MCP (Large)Δ (Large)
Wall-Clock Latency64.81s134.02s+106.8%63.81s129.19s+102.4%
Process Start → First Event0.13s0.14s—0.15s0.15s—
First Event → First Tool Call4.92s5.86s—4.54s5.61s—
MCP Initialize → First Semantic Call——————
MCP Server Start → Initialize——————
Top-Level User Turns110%110%
Internal Tool Cycles924+166.7%822+175.0%
Initial Load / Discovery Turns32-33.3%32-33.3%
MCP Discovery / Schema Turns00—00—
Tool Invocations (per run)924+166.7%822+175.0%
Output Tokens21312177+2.2%21411919-10.4%
Reasoning / Thinking Tokens638997+56.3%634763+20.3%
Total Input Tokens233494475294+103.6%202971474331+133.7%
Cached Input Tokens212480429824+102.3%184064422912+129.8%
Uncached Input Tokens2101445470+116.4%1890751419+172.0%
Cost0.14030.2608+85.9%0.12800.2678+109.3%
Cached vs Uncached Token Ratio10.11:19.45:1-6.5%9.74:18.22:1-15.5%
Oracle L1: Mutation PolicyPASSPASS—PASSPASS—
Oracle L2: AST InvariantsPASSPASS—PASSPASS—
Oracle L3: Clean BuildPASSPASS—PASSPASS—
Oracle L4: Verification TestPASSPASS—PASSPASS—
Semantic Tool Invocation Verified (per run)N/APASS—N/APASS—
Baseline vs Semedit Agentic in Small Context
  • Vanilla (Baseline vs Semedit Agentic in Small Context) Edit: File request/request.go modified (34 lines -> 41 lines)
  • Semedit MCP (Baseline vs Semedit Agentic in Small Context) Edit: File request/request.go modified (34 lines -> 40 lines)
#VanillaSemedit MCP
1✓ ✓
/bin/zsh -lc "pwd && \
rg --files -g 'AGENTS.md' -g 'PROJECT_BRIEF.md' -g '*.go' | head -200"
✓ ✓
/bin/zsh -lc "pwd && \
rg --files -g 'PROJECT_BRIEF.md' -g 'docs/*.md' -g 'Makefile' -g 'go.mod' -g '*_test.go' -g 'AGENTS*.md' | head -100"
2✓ ✓
/bin/zsh -lc "cat go.mod && \
sed -n '1,240p' request/request.go && \
rg -n '\\.ID|\\bID\\b|Normalize|Validate' --glob '*.go'"
✓ ✓
/bin/zsh -lc 'cat docs/identity-model.md && \
cat go.mod'
3✓ ✓
/bin/zsh -lc "for f in gateway/handler.go notifications/notifier.go queue/queue.go storage/requests.go scheduler/jobs.go reporting/report.go correlation/identities.go request/request_test.go gateway/handler_test.go; do printf '\\n--- %s ---\\n' \""'$f"; cat "$f"; done'
semedit/semantic_lookup (✓ ✓)
{
  "symbol": "Request"
}
4✓ ✓
/bin/zsh -lc "python3 - <<'PY'
from pathlib import Path
p = Path('request/request.go')
s = p.read_text()
s = s.replace('type Request struct {\\n\\tID      string', 'var ErrInvalidRequest = errors.New(\"invalid request\")\\n\\ntype Request struct {\\n\\tRequestID string')
s = s.replace('if r.ID == \"\" {\\n\\t\\treturn errors.New(\"invalid request\")', 'if r.RequestID == \"\" {\\n\\t\\treturn fmt.Errorf(\"%w\", ErrInvalidRequest)')
s = s.replace('\"errors\"\\n\\t\"strings\"', '\"errors\"\\n\\t\"fmt\"\\n\\t\"strings\"')
s = s.replace('func Normalize(kind string) string {\\n\\tkind = strings.TrimSpace(kind)\\n\\tkind = strings.ToLower(kind)\\n\\treturn kind\\n}', 'func Normalize(kind string) string {\\n\\treturn normalizeKind(kind)\\n}\\n\\nfunc normalizeKind(kind string) string {\\n\\tkind = strings.TrimSpace(kind)\\n\\tkind = strings.ToLower(kind)\\n\\treturn kind\\n}')
s = s.replace('if r.ID == id {', 'if r.RequestID == id {')
p.write_text(s)
# Request.RequestID semantic uses outside request/request.go; use full syntactic context per file.
replacements = {
 'gateway/handler.go': [('r.ID, err)', 'r.RequestID, err)')],
 'notifications/notifier.go': [('r.ID', 'r.RequestID'), ('r.Request.ID', 'r.Request.RequestID')],
 'queue/queue.go': [('r.ID', 'r.RequestID')],
 'storage/requests.go': [('record.ID == r.ID', 'record.ID == r.RequestID')],
 'scheduler/jobs.go': [('left.Request.ID', 'left.Request.RequestID'), ('right.Request.ID', 'right.Request.RequestID'), ('job.Request.ID', 'job.Request.RequestID'), ('r.ID', 'r.RequestID')],
 'reporting/report.go': [('r.Request.ID', 'r.Request.RequestID')],
 'correlation/identities.go': [('r.ID, resp.ID', 'r.RequestID, resp.ID')],
}
for name, pairs in replacements.items():
    p = Path(name)
    s = p.read_text()
    for old, new in pairs:
        s = s.replace(old, new)
    p.write_text(s)
PY
gofmt -w request/request.go gateway/handler.go notifications/notifier.go queue/queue.go storage/requests.go scheduler/jobs.go reporting/report.go correlation/identities.go"
semedit/semantic_lookup (✓ ✓)
{
  "symbol": "Normalize"
}
5✓ ✓
/bin/zsh -lc "rg -n '\\.ID|Request\\{["'^'"\\n]*|type Request struct|ErrInvalidRequest|Normalize|normalizeKind' --glob '*.go' && \
git diff -- go.mod go.sum && \
git diff --"
semedit/semantic_inspect_symbol (✓ ✓)
{
  "file": "request/request.go",
  "symbol": "Normalize"
}
6✓ ✓
/bin/zsh -lc 'git status --short && \
go test ./...'
semedit/semantic_lookup (✓ ✓)
{
  "file": "request/request.go",
  "symbol": "Validate"
}
7✓ ✓
/bin/zsh -lc 'git rev-parse --show-toplevel && \
git status --short --untracked-files=all | tail -30 && \
go build ./...'
semedit/semantic_inspect_symbol (✓ ✓)
{
  "file": "request/request.go",
  "symbol": "Request"
}
8✓ ✓
/bin/zsh -lc "python3 - <<'PY'
from pathlib import Path
p=Path('request/request_test.go')
s=p.read_text().replace('import \"testing\"', 'import (\\n\\t\"errors\"\\n\\t\"testing\"\\n)')
s=s.replace('if err == nil {\\n\\t\\tt.Fatal(\"Validate() accepted an empty request identity\")\\n\\t}', 'if "'!errors.Is(err, ErrInvalidRequest) {'"\\n\\t\\tt.Fatalf(\"Validate() error = %v, want ErrInvalidRequest\", err)\\n\\t}')
p.write_text(s)
PY
gofmt -w request/request_test.go
go test ./... && \
go build ./..."
semedit/semantic_lookup (✓ ✗): resolve ID in request/request.go: symbol not found
{
  "file": "request/request.go",
  "symbol": "ID"
}
9✓ ✓
/bin/zsh -lc "cat request/request.go && \
rg -n '\\b(r|left\\.Request|right\\.Request|job\\.Request|r\\.Request)\\.ID\\b' --glob '*.go' . || \
true && \
rg -n '\\.ID' --glob '*.go' ."
semedit/semantic_inspect_symbol (✓ ✓)
{
  "file": "request/request.go",
  "symbol": "Request.Validate"
}
10—semedit/semantic_find_references (✓ ✓)
{
  "file": "request/request.go",
  "symbol": "Request"
}
11—semedit/semantic_lookup (✓ ✓)
{
  "file": "request/request.go",
  "symbol": "Request.ID"
}
12—semedit/semantic_rename (✓ ✓)
{
  "file": "request/request.go",
  "language": "go",
  "symbol": "Request.ID",
  "to": "RequestID"
}
13—✓ ✓
/bin/zsh -lc 'cat request/request_test.go'
14—semedit/semantic_inspect_symbol (✓ ✓)
{
  "file": "request/request.go",
  "symbol": "Normalize"
}
15—semedit/semantic_insert_decl (✓ ✓)
{
  "file": "request/request.go",
  "source": "var ErrInvalidRequest = errors.New(\"invalid request\")"
}
16—semedit/semantic_replace_body (✓ ✓)
{
  "body": "if r.RequestID == \"\" {\n\t\treturn ErrInvalidRequest\n\t}\n\treturn nil",
  "file": "request/request.go",
  "symbol": "Request.Validate"
}
17—semedit/semantic_replace_body (✓ ✓)
{
  "body": "return normalizeKind(kind)",
  "file": "request/request.go",
  "symbol": "Normalize"
}
18—semedit/semantic_insert_function (✓ ✓)
{
  "file": "request/request.go",
  "source": "func normalizeKind(kind string) string {\n\tkind = strings.TrimSpace(kind)\n\tkind = strings.ToLower(kind)\n\treturn kind\n}"
}
19—semedit/semantic_find_references (✓ ✓)
{
  "file": "request/request.go",
  "symbol": "Request.RequestID"
}
20—semedit/semantic_inspect_symbol (✓ ✓)
{
  "file": "request/request.go",
  "symbol": "Request"
}
21—semedit/semantic_inspect_symbol (✓ ✓)
{
  "file": "request/request.go",
  "symbol": "Normalize"
}
22—semedit/semantic_inspect_symbol (✓ ✓)
{
  "file": "request/request.go",
  "symbol": "normalizeKind"
}
23—semedit/semantic_inspect_symbol (✓ ✓)
{
  "file": "request/request.go",
  "symbol": "Request.Validate"
}
24—✓ ✓
/bin/zsh -lc 'git status --short'
Baseline vs Semedit Agentic in Large Context
  • Vanilla (Baseline vs Semedit Agentic in Large Context) Edit: File request/request.go modified (34 lines -> 40 lines)
  • Semedit MCP (Baseline vs Semedit Agentic in Large Context) Edit: File request/request.go modified (34 lines -> 40 lines)
#VanillaSemedit MCP
1✓ ✓
/bin/zsh -lc "pwd && \
rg --files -g 'AGENTS.md' -g 'AGENTS.override.md' -g 'PROJECT_BRIEF.md' -g 'go.mod' -g 'go.sum' -g '*.go' | head -n 100"
✓ ✓
/bin/zsh -lc "pwd && \
rg --files -g 'PROJECT_BRIEF.md' -g 'Makefile' -g 'go.mod' -g 'go.sum' -g 'docs/*.md' -g '*AGENTS*' | sort"
2✓ ✓
/bin/zsh -lc "git status --short && \
cat go.mod && \
sed -n '1,240p' request/request.go && \
rg -n '\\bRequest\\b|\\.ID\\b|Normalize\\(' --glob '*.go'"
✓ ✓
/bin/zsh -lc "cat docs/identity-model.md && \
cat go.mod && \
rg --files -g 'Makefile' -g 'PROJECT_BRIEF.md' -g '*_test.go' | sort"
3✓ ✓
/bin/zsh -lc 'cat gateway/handler.go notifications/notifier.go queue/queue.go review/review.go storage/requests.go scheduler/jobs.go correlation/identities.go reporting/report.go request/request_test.go'
semedit/semantic_lookup (✓ ✓)
{
  "symbol": "Request"
}
4file_change (✓ ✓)semedit/semantic_outline (✓ ✓)
{
  "path": "request"
}
5✓ ✓
/bin/zsh -lc "gofmt -w request/request.go gateway/handler.go notifications/notifier.go queue/queue.go storage/requests.go scheduler/jobs.go correlation/identities.go reporting/report.go && \
rg -n '\\.ID\\b|Request\\{["'^'"\\n]*\\}' --glob '*.go' && \
git diff -- . ':"'!go.mod'"' ':"'!go.sum'"' && \
git diff --check"
semedit/semantic_lookup (✓ ✓)
{
  "file": "request/request.go",
  "symbol": "Request.ID"
}
6✓ ✓
/bin/zsh -lc 'go build ./... && \
go test ./...'
semedit/semantic_inspect_symbol (✓ ✓)
{
  "file": "request/request.go",
  "symbol": "FindByID"
}
7✓ ✓
/bin/zsh -lc "git diff --name-only -- request gateway notifications queue storage scheduler correlation reporting response review && \
git diff -- request/request.go gateway/handler.go notifications/notifier.go queue/queue.go storage/requests.go scheduler/jobs.go correlation/identities.go reporting/report.go && \
git diff --exit-code -- go.mod go.sum && \
git status --short -- request gateway notifications queue storage scheduler correlation reporting go.mod go.sum && \
rg -n 'r\\.ID|Request\\.ID|\\.Request\\.ID|request\\.Request' --glob '*.go'"
semedit/semantic_find_references (✓ ✓)
{
  "file": "request/request.go",
  "symbol": "Request.ID"
}
8✓ ✓
/bin/zsh -lc "git status --short && \
git ls-files request/request.go && \
sed -n '1,60p' request/request.go && \
git diff --stat && \
git rev-parse --show-toplevel"
semedit/semantic_inspect_symbol (✓ ✓)
{
  "file": "request/request.go",
  "symbol": "Request.Validate"
}
9—semedit/semantic_inspect_symbol (✓ ✓)
{
  "file": "request/request.go",
  "symbol": "Normalize"
}
10—semedit/semantic_rename (✓ ✓)
{
  "symbol": "Request.ID",
  "to": "RequestID"
}
11—semedit/semantic_insert_decl (✓ ✓)
{
  "file": "request/request.go",
  "group": "append",
  "source": "var ErrInvalidRequest = errors.New(\"invalid request\")"
}
12—semedit/semantic_replace_body (✓ ✓)
{
  "body": "if r.RequestID == \"\" {\n\t\treturn ErrInvalidRequest\n\t}\n\treturn nil",
  "file": "request/request.go",
  "symbol": "Request.Validate"
}
13—semedit/semantic_replace_body (✓ ✓)
{
  "body": "return normalizeKind(kind)",
  "file": "request/request.go",
  "symbol": "Normalize"
}
14—semedit/semantic_insert_function (✓ ✓)
{
  "access_modifier": "private",
  "file": "request/request.go",
  "source": "func normalizeKind(kind string) string {\n\tkind = strings.TrimSpace(kind)\n\tkind = strings.ToLower(kind)\n\treturn kind\n}"
}
15—semedit/semantic_find_references (✓ ✓)
{
  "file": "request/request.go",
  "symbol": "Request.RequestID"
}
16—semedit/semantic_inspect_symbol (✓ ✓)
{
  "file": "request/request.go",
  "symbol": "Request"
}
17—semedit/semantic_inspect_symbol (✓ ✓)
{
  "file": "request/request.go",
  "symbol": "Normalize"
}
18—semedit/semantic_inspect_symbol (✓ ✓)
{
  "file": "request/request.go",
  "symbol": "Request.Validate"
}
19—semedit/semantic_inspect_symbol (✓ ✓)
{
  "file": "request/request.go",
  "symbol": "normalizeKind"
}
20—semedit/semantic_inspect_symbol (✓ ✓)
{
  "file": "request/request.go",
  "symbol": "ErrInvalidRequest"
}
21—semedit/semantic_lookup (✓ ✓)
{
  "file": "response/response.go",
  "symbol": "Response.ID"
}
22—semedit/semantic_lookup (✓ ✓)
{
  "file": "review/review.go",
  "symbol": "Review.ID"
}

default prompt · prescriptive MCP instructions · readwrite semedit restriction

SettingValue
Test casetask-12-request-identity-migration
Targetcodex/gpt-6-luna/medium
Prompt variantdefault
MCP server instructionsprescriptive
Semedit arm restrictionreadwrite
Fixturetestdata/bench/task_12_request_identity_migration.txtar

Vanilla LLM Prompt:

You are forbidden to modify protected files: “go.mod”, “go.sum”.

Migrate the request identity API in this large multi-package Go service. Rename only Request.ID to Request.RequestID and update every semantic use across packages; Response.ID and Review.ID are separate identities and must remain unchanged, including the many syntactically identical r.ID expressions. Add a package sentinel ErrInvalidRequest and return it from Validate when the request ID is empty, preserving error wrapping and callers. Extract the normalization block from the existing exported request.Normalize function into an unexported normalizeKind helper and keep Normalize exported with the same behavior and signature. Preserve module metadata and existing tests. Verification differs by editing method: when making ordinary file edits, run the project build and tests and ensure both pass; when using semedit, treat clean compiler diagnostic deltas returned by its mutation commands as build-clean evidence and do not run a separate build or test command. Do not use semantic editing MCP tools; use standard file editing. When done, output DONE.

Semedit MCP Prompt:

You are forbidden to modify protected files: “go.mod”, “go.sum”.

Migrate the request identity API in this large multi-package Go service. Rename only Request.ID to Request.RequestID and update every semantic use across packages; Response.ID and Review.ID are separate identities and must remain unchanged, including the many syntactically identical r.ID expressions. Add a package sentinel ErrInvalidRequest and return it from Validate when the request ID is empty, preserving error wrapping and callers. Extract the normalization block from the existing exported request.Normalize function into an unexported normalizeKind helper and keep Normalize exported with the same behavior and signature. Preserve module metadata and existing tests. Verification differs by editing method: when making ordinary file edits, run the project build and tests and ensure both pass; when using semedit, treat clean compiler diagnostic deltas returned by its mutation commands as build-clean evidence and do not run a separate build or test command. Do not inspect Go implementation files (non-test .go) with shell commands such as cat, sed, or rg. Use semantic code inspection tools for those files. Reading project documentation (docs/.md), build manifests (go.mod, Makefile), and visible test files in the task workspace is permitted. Use semedit semantic tools for supported source code modifications. Shell commands for builds and tests are allowed. When done, output DONE.

Initial Workspace State (Before Edit)
package request

import (
	"errors"
	"strings"
)

type Request struct {
	ID      string
	Kind    string
	Payload []byte
}

func (r Request) Validate() error {
	if r.ID == "" {
		return errors.New("invalid request")
	}
	return nil
}

func Normalize(kind string) string {
	kind = strings.TrimSpace(kind)
	kind = strings.ToLower(kind)
	return kind
}

func FindByID(requests []Request, id string) (Request, bool) {
	for _, r := range requests {
		if r.ID == id {
			return r, true
		}
	}
	return Request{}, false
}
MetricVanilla (Small)MCP (Small)Δ (Small)Vanilla (Large)MCP (Large)Δ (Large)
Wall-Clock Latency71.89s80.79s+12.4%60.14s104.49s+73.8%
Process Start → First Event0.15s0.59s—0.15s0.15s—
First Event → First Tool Call4.45s7.95s—7.06s7.61s—
MCP Initialize → First Semantic Call——————
MCP Server Start → Initialize——————
Top-Level User Turns110%110%
Internal Tool Cycles1314+7.7%717+142.9%
Initial Load / Discovery Turns53-40.0%42-50.0%
MCP Discovery / Schema Turns00—00—
Tool Invocations (per run)1314+7.7%717+142.9%
Output Tokens25501629-36.1%18111709-5.6%
Reasoning / Thinking Tokens628600-4.5%393620+57.8%
Total Input Tokens321606377639+17.4%177975439156+146.8%
Cached Input Tokens299520328192+9.6%160768388864+141.9%
Uncached Input Tokens2208649447+123.9%1720750292+192.3%
Cost0.16980.2335+37.5%0.11080.2521+127.6%
Cached vs Uncached Token Ratio13.56:16.64:1-51.1%9.34:17.73:1-17.2%
Oracle L1: Mutation PolicyPASSPASS—PASSPASS—
Oracle L2: AST InvariantsPASSPASS—PASSPASS—
Oracle L3: Clean BuildPASSPASS—PASSPASS—
Oracle L4: Verification TestPASSPASS—PASSPASS—
Semantic Tool Invocation Verified (per run)N/APASS—N/APASS—
Baseline vs Semedit Agentic in Small Context
  • Vanilla (Baseline vs Semedit Agentic in Small Context) Edit: File request/request.go modified (34 lines -> 40 lines)
  • Semedit MCP (Baseline vs Semedit Agentic in Small Context) Edit: File request/request.go modified (34 lines -> 40 lines)
#VanillaSemedit MCP
1✓ ✓
/bin/zsh -lc "pwd && \
rg --files -g 'AGENTS.md' -g 'PROJECT_BRIEF.md' -g 'go.mod' -g 'Makefile' -g '*.go' | head -200"
✓ ✓
/bin/zsh -lc "pwd && \
rg --files -g 'PROJECT_BRIEF.md' -g 'docs/*.md' -g '*_test.go' -g 'Makefile' -g 'go.mod' -g 'AGENTS.md'"
2? ✗
/bin/zsh -lc "cat request/request.go && \
rg '\\.ID|\\bID\\b|Normalize|Validate' -g '*.go' && \
rg --files -g 'AGENTS.md' -g 'PROJECT_BRIEF.md' -g 'Makefile'"
✓ ✓
/bin/zsh -lc "find . -maxdepth 2 -type f -name '*.md' -print"
3✓ ✓
/bin/zsh -lc "rg --files -g 'README*' -g '*.md' -g 'go.work' -g 'Makefile' && \
cat go.mod && \
cat request/request_test.go && \
rg 'request\\.Request\\{|Request\\{' -g '*.go'"
? ✗
/bin/zsh -lc 'cat docs/identity-model.md && \
cat request/request_test.go && \
cat Makefile && \
cat go.mod'
4✓ ✓
/bin/zsh -lc 'cat docs/identity-model.md && \
cat AGENTS.override.md'
semedit/semantic_lookup (✓ ✓)
{
  "file": "request/request.go",
  "symbol": "Request"
}
5✓ ✓
/bin/zsh -lc 'cat gateway/handler.go notifications/notifier.go queue/queue.go scheduler/jobs.go storage/requests.go reporting/report.go'
semedit/semantic_lookup (✓ ✓)
{
  "file": "request/request.go",
  "symbol": "Validate"
}
6✓ ✓
/bin/zsh -lc "python3 - <<'PY'
from pathlib import Path
files = [
    'request/request.go', 'gateway/handler.go', 'notifications/notifier.go',
    'queue/queue.go', 'scheduler/jobs.go', 'storage/requests.go', 'reporting/report.go',
    'request/request_test.go', 'gateway/handler_test.go', 'storage/requests_test.go',
]
replacements = {
    'request/request.go': [('ID      string', 'RequestID string'), ('r.ID', 'r.RequestID')],
    'gateway/handler.go': [('r.ID', 'r.RequestID')],
    'notifications/notifier.go': [('r.ID', 'r.RequestID'), ('r.Request.ID', 'r.Request.RequestID')],
    'queue/queue.go': [('r.ID', 'r.RequestID')],
    'scheduler/jobs.go': [('left.Request.ID', 'left.Request.RequestID'), ('right.Request.ID', 'right.Request.RequestID'), ('job.Request.ID', 'job.Request.RequestID'), ('r.ID', 'r.RequestID')],
    'storage/requests.go': [('r.ID', 'r.RequestID')],
    'reporting/report.go': [('r.Request.ID', 'r.Request.RequestID')],
    'request/request_test.go': [('Request{\"req-7\", \"audit\", nil}', 'Request{RequestID: \"req-7\", Kind: \"audit\"}'), ('[]Request{{\"other\", \"audit\", nil}, want}', '[]Request{{RequestID: \"other\", Kind: \"audit\"}, want}')],
    'gateway/handler_test.go': [('request.Request{\"req-1\", \"audit\", nil}', 'request.Request{RequestID: \"req-1\", Kind: \"audit\"}')],
    'storage/requests_test.go': [('request.Request{\"req-2\", \"\", nil}', 'request.Request{RequestID: \"req-2\"}')],
}
for name in files:
    p = Path(name)
    text = p.read_text()
    for old, new in replacements.get(name, []):
        text = text.replace(old, new)
    p.write_text(text)
PY
"
semedit/semantic_lookup (✓ ✓)
{
  "file": "request/request.go",
  "symbol": "Normalize"
}
7✓ ✓
/bin/zsh -lc "python3 - <<'PY'
from pathlib import Path
p = Path('request/request.go')
s = p.read_text()
s = s.replace('\"errors\"\\n\\t\"strings\"', '\"errors\"\\n\\t\"strings\"')
s = s.replace('type Request struct {', 'var ErrInvalidRequest = errors.New(\"invalid request\")\\n\\ntype Request struct {')
s = s.replace('''\\tif r.RequestID == \"\" {\\n\\t\\treturn errors.New(\"invalid request\")\\n\\t}''', '''\\tif r.RequestID == \"\" {\\n\\t\\treturn ErrInvalidRequest\\n\\t}''')
s = s.replace('''func Normalize(kind string) string {\\n\\tkind = strings.TrimSpace(kind)\\n\\tkind = strings.ToLower(kind)\\n\\treturn kind\\n}''', '''func Normalize(kind string) string {\\n\\treturn normalizeKind(kind)\\n}\\n\\nfunc normalizeKind(kind string) string {\\n\\tkind = strings.TrimSpace(kind)\\n\\tkind = strings.ToLower(kind)\\n\\treturn kind\\n}''')
p.write_text(s)
PY
gofmt -w request/request.go gateway/handler.go notifications/notifier.go queue/queue.go scheduler/jobs.go storage/requests.go reporting/report.go request/request_test.go gateway/handler_test.go storage/requests_test.go
rg '\\bRequest\\{["'^'"\\n]*\"req-|\\.Request\\.ID|\\br\\.ID\\b|Request struct|ErrInvalidRequest|normalizeKind' -g '*.go'"
semedit/semantic_inspect_symbol (✓ ✓)
{
  "file": "request/request.go",
  "symbol": "Request"
}
8✓ ✓
/bin/zsh -lc "cat request/request.go && \
rg '\\.ID' -g '*.go' && \
git diff --"
semedit/semantic_inspect_symbol (✓ ✓)
{
  "file": "request/request.go",
  "symbol": "Request.Validate"
}
9? ✗
/bin/zsh -lc 'go test ./... && \
go build ./...'
semedit/semantic_inspect_symbol (✓ ✓)
{
  "file": "request/request.go",
  "symbol": "Normalize"
}
10✓ ✓
/bin/zsh -lc 'cat correlation/identities.go'
semedit/semantic_find_references (✓ ✓)
{
  "file": "request/request.go",
  "symbol": "Request"
}
11✓ ✓
/bin/zsh -lc "python3 - <<'PY'
from pathlib import Path
p = Path('correlation/identities.go')
s = p.read_text().replace('r.ID', 'r.RequestID')
p.write_text(s)
p = Path('request/request_test.go')
s = p.read_text().replace('import \"testing\"', 'import (\\n\\t\"errors\"\\n\\t\"testing\"\\n)')
s = s.replace('''\\tif err == nil {\\n\\t\\tt.Fatal(\"Validate() accepted an empty request identity\")\\n\\t}''', '''\\tif "'!errors.Is(err, ErrInvalidRequest) {'"\\n\\t\\tt.Fatalf(\"Validate() error = %v, want ErrInvalidRequest\", err)\\n\\t}''')
p.write_text(s)
PY
gofmt -w correlation/identities.go request/request_test.go
go test ./... && \
go build ./..."
semedit/semantic_lookup (✓ ✓)
{
  "file": "request/request.go",
  "symbol": "Request.ID"
}
12✓ ✓
/bin/zsh -lc "git diff -- request/request.go request/request_test.go gateway/handler.go gateway/handler_test.go notifications/notifier.go queue/queue.go scheduler/jobs.go storage/requests.go storage/requests_test.go reporting/report.go correlation/identities.go && \
git status --short -- go.mod go.sum && \
rg 'r\\.ID|Request\\.ID|left\\.Request\\.ID|right\\.Request\\.ID|job\\.Request\\.ID' -g '*.go'"
semedit/semantic_rename (✓ ✓)
{
  "symbol": "Request.ID",
  "to": "RequestID"
}
13✓ ✓
/bin/zsh -lc "git status --short && \
git diff --stat && \
git diff --cached --stat && \
git show HEAD:request/request.go | head -35 && \
sed -n '1,70p' request/request.go"
semedit/semantic_batch (✓ ✓)
{
  "edits": [
    {
      "params": {
        "file": "request/request.go",
        "source": "var ErrInvalidRequest = errors.New(\"invalid request\")"
      },
      "tool": "semantic_insert_decl"
    },
    {
      "params": {
        "body": "if r.RequestID == \"\" {\n\t\treturn ErrInvalidRequest\n\t}\n\treturn nil",
        "file": "request/request.go",
        "symbol": "Request.Validate"
      },
      "tool": "semantic_replace_body"
    },
    {
      "params": {
        "body": "return normalizeKind(kind)",
        "file": "request/request.go",
        "symbol": "Normalize"
      },
      "tool": "semantic_replace_body"
    },
    {
      "params": {
        "file": "request/request.go",
        "placement": "private_end",
        "source": "func normalizeKind(kind string) string {\n\tkind = strings.TrimSpace(kind)\n\tkind = strings.ToLower(kind)\n\treturn kind\n}"
      },
      "tool": "semantic_insert_function"
    }
  ]
}
14—semedit/semantic_find_references (✓ ✓)
{
  "file": "request/request.go",
  "symbol": "Request.RequestID"
}
Baseline vs Semedit Agentic in Large Context
  • Vanilla (Baseline vs Semedit Agentic in Large Context) Edit: File request/request.go modified (34 lines -> 40 lines)
  • Semedit MCP (Baseline vs Semedit Agentic in Large Context) Edit: File request/request.go modified (34 lines -> 40 lines)
#VanillaSemedit MCP
1✓ ✓
/bin/zsh -lc "rg --files -g 'AGENTS.md' -g 'AGENTS.override.md' -g 'PROJECT_BRIEF.md' -g 'go.mod' -g 'go.sum' -g '*.go' | head -200"
✓ ✓
/bin/zsh -lc "pwd && \
rg --files -g 'PROJECT_BRIEF.md' -g 'Makefile' -g 'docs/*.md' -g '*_test.go' -g 'go.mod' -g 'go.sum' | head -120"
2✓ ✓
/bin/zsh -lc "cat AGENTS.override.md && \
rg -n '\\bRequest\\b|\\.ID\\b|func .*Normalize|Validate|ErrInvalid' --glob '*.go'"
✓ ✓
/bin/zsh -lc 'cat docs/identity-model.md && \
cat go.mod && \
ls'
3✓ ✓
/bin/zsh -lc "cat request/request.go request/request_test.go; cat go.mod; rg -n 'Request\\s*\\{|request\\.Request\\s*\\{|\\.Request\\.ID|r\\.ID|\\.ID' --glob '*.go'"
semedit/semantic_lookup (✓ ✓)
{
  "language": "go",
  "symbol": "Request"
}
4✓ ✓
/bin/zsh -lc 'cat gateway/handler.go storage/requests.go reporting/report.go scheduler/jobs.go notifications/notifier.go queue/queue.go correlation/identities.go'
semedit/semantic_lookup (✓ ✓)
{
  "language": "go",
  "symbol": "Normalize"
}
5✓ ✓
/bin/zsh -lc "python3 - <<'PY'
from pathlib import Path
import os, tempfile
changes = {
'request/request.go': [('ID      string','RequestID string'), ('if r.ID == \"\" {\\n\\t\\treturn errors.New(\"invalid request\")\\n\\t}', 'if r.RequestID == \"\" {\\n\\t\\treturn ErrInvalidRequest\\n\\t}'), ('func (r Request) Validate() error {', 'var ErrInvalidRequest = errors.New(\"invalid request\")\\n\\nfunc (r Request) Validate() error {'), ('func Normalize(kind string) string {\\n\\tkind = strings.TrimSpace(kind)\\n\\tkind = strings.ToLower(kind)\\n\\treturn kind\\n}', 'func Normalize(kind string) string {\\n\\treturn normalizeKind(kind)\\n}\\n\\nfunc normalizeKind(kind string) string {\\n\\tkind = strings.TrimSpace(kind)\\n\\tkind = strings.ToLower(kind)\\n\\treturn kind\\n}'), ('r.ID == id','r.RequestID == id')],
'request/request_test.go': [('err := (Request{Kind: \"audit\"}).Validate()', 'err := (Request{Kind: \"audit\"}).Validate()'), ('want := Request{\"req-7\", \"audit\", nil}', 'want := Request{RequestID: \"req-7\", Kind: \"audit\"}'), ('[]Request{{\"other\", \"audit\", nil}, want}', '[]Request{{RequestID: \"other\", Kind: \"audit\"}, want}')],
'gateway/handler.go': [('r.ID, err','r.RequestID, err')],
'gateway/handler_test.go': [('request.Request{\"req-1\", \"audit\", nil}', 'request.Request{RequestID: \"req-1\", Kind: \"audit\"}')],
'storage/requests.go': [('record.ID == r.ID','record.ID == r.RequestID')],
'storage/requests_test.go': [('request.Request{\"req-2\", \"\", nil}', 'request.Request{RequestID: \"req-2\"}')],
'reporting/report.go': [('r.Request.ID','r.Request.RequestID')],
'scheduler/jobs.go': [('left.Request.ID','left.Request.RequestID'), ('right.Request.ID','right.Request.RequestID'), ('job.Request.ID','job.Request.RequestID'), ('r.ID','r.RequestID')],
'notifications/notifier.go': [('r.ID','r.RequestID'), ('r.Request.ID','r.Request.RequestID')],
'queue/queue.go': [('r.ID','r.RequestID')],
'correlation/identities.go': [('r.ID, resp.ID','r.RequestID, resp.ID')],
}
for name, pairs in changes.items():
    path=Path(name); data=path.read_text()
    for old,new in pairs:
        if old not in data: raise SystemExit(f'missing {old"'!r} in {name}'"')
        data=data.replace(old,new)
    fd,tmp=tempfile.mkstemp(dir=path.parent, prefix=path.name+'.')
    try:
        with os.fdopen(fd,'w') as f:
            f.write(data); f.flush(); os.fsync(f.fileno())
        os.replace(tmp,path)
    finally:
        if os.path.exists(tmp): os.unlink(tmp)
PY
rg -n '\\bRequest\\s*\\{|\\.Request\\.ID|r\\.ID|RequestID|ErrInvalidRequest|normalizeKind' --glob '*.go'"
semedit/semantic_lookup (✓ ✓)
{
  "language": "go",
  "symbol": "Validate"
}
6✓ ✓
/bin/zsh -lc 'gofmt -w request/request.go request/request_test.go gateway/handler.go gateway/handler_test.go storage/requests.go storage/requests_test.go reporting/report.go scheduler/jobs.go notifications/notifier.go queue/queue.go correlation/identities.go && \
go build ./... && \
go test ./...'
semedit/semantic_inspect_symbol (✓ ✓)
{
  "file": "request/request.go",
  "symbol": "Request"
}
7✓ ✓
/bin/zsh -lc 'git status --short && \
git diff -- go.mod go.sum && \
git diff --stat && \
git diff -- request/request.go request/request_test.go gateway/handler.go storage/requests.go reporting/report.go scheduler/jobs.go notifications/notifier.go queue/queue.go correlation/identities.go'
semedit/semantic_inspect_symbol (✓ ✓)
{
  "file": "request/request.go",
  "symbol": "Normalize"
}
8—semedit/semantic_inspect_symbol (✓ ✓)
{
  "file": "request/request.go",
  "symbol": "Request.Validate"
}
9—✓ ✓
/bin/zsh -lc "cat request/request_test.go && \
rg -n '\\.ID|ID:' --glob '*_test.go'"
10—semedit/semantic_lookup (✓ ✓)
{
  "language": "go",
  "symbol": "Request.ID"
}
11—semedit/semantic_find_references (✓ ✓)
{
  "file": "request/request.go",
  "language": "go",
  "symbol": "Request.ID"
}
12—semedit/semantic_rename (✓ ✓)
{
  "auto_organize_imports": true,
  "language": "go",
  "symbol": "Request.ID",
  "to": "RequestID"
}
13—semedit/semantic_batch (✓ ✓)
{
  "auto_organize_imports": true,
  "edits": [
    {
      "params": {
        "file": "request/request.go",
        "source": "var ErrInvalidRequest = errors.New(\"invalid request\")"
      },
      "tool": "semantic_insert_decl"
    },
    {
      "params": {
        "body": "if r.RequestID == \"\" {\n\t\treturn ErrInvalidRequest\n\t}\n\treturn nil",
        "file": "request/request.go",
        "symbol": "Request.Validate"
      },
      "tool": "semantic_replace_body"
    },
    {
      "params": {
        "body": "return normalizeKind(kind)",
        "file": "request/request.go",
        "symbol": "Normalize"
      },
      "tool": "semantic_replace_body"
    },
    {
      "params": {
        "file": "request/request.go",
        "source": "func normalizeKind(kind string) string {\n\tkind = strings.TrimSpace(kind)\n\tkind = strings.ToLower(kind)\n\treturn kind\n}"
      },
      "tool": "semantic_insert_function"
    }
  ]
}
14—semedit/semantic_find_references (✓ ✓)
{
  "file": "request/request.go",
  "language": "go",
  "symbol": "Request.RequestID"
}
15—✓ ✓
/bin/zsh -lc 'git status --short'
16—semedit/semantic_inspect_symbol (✓ ✓)
{
  "file": "request/request.go",
  "symbol": "Normalize"
}
17—semedit/semantic_inspect_symbol (✓ ✓)
{
  "file": "request/request.go",
  "symbol": "normalizeKind"
}

default prompt · prescriptive MCP instructions · readwrite semedit restriction

SettingValue
Test casetask-12-request-identity-migration
Targetcodex/gpt-6-luna/medium
Prompt variantdefault
MCP server instructionsprescriptive
Semedit arm restrictionreadwrite
Fixturetestdata/bench/task_12_request_identity_migration.txtar

Vanilla LLM Prompt:

You are forbidden to modify protected files: “go.mod”, “go.sum”.

Migrate the request identity API in this large multi-package Go service. Rename only Request.ID to Request.RequestID and update every semantic use across packages; Response.ID and Review.ID are separate identities and must remain unchanged, including the many syntactically identical r.ID expressions. Add a package sentinel ErrInvalidRequest and return it from Validate when the request ID is empty, preserving error wrapping and callers. Extract the normalization block from the existing exported request.Normalize function into an unexported normalizeKind helper and keep Normalize exported with the same behavior and signature. Preserve module metadata and existing tests. Verification differs by editing method: when making ordinary file edits, run the project build and tests and ensure both pass; when using semedit, treat clean compiler diagnostic deltas returned by its mutation commands as build-clean evidence and do not run a separate build or test command. Do not use semantic editing MCP tools; use standard file editing. When done, output DONE.

Semedit MCP Prompt:

You are forbidden to modify protected files: “go.mod”, “go.sum”.

Migrate the request identity API in this large multi-package Go service. Rename only Request.ID to Request.RequestID and update every semantic use across packages; Response.ID and Review.ID are separate identities and must remain unchanged, including the many syntactically identical r.ID expressions. Add a package sentinel ErrInvalidRequest and return it from Validate when the request ID is empty, preserving error wrapping and callers. Extract the normalization block from the existing exported request.Normalize function into an unexported normalizeKind helper and keep Normalize exported with the same behavior and signature. Preserve module metadata and existing tests. Verification differs by editing method: when making ordinary file edits, run the project build and tests and ensure both pass; when using semedit, treat clean compiler diagnostic deltas returned by its mutation commands as build-clean evidence and do not run a separate build or test command. Do not inspect Go implementation files (non-test .go) with shell commands such as cat, sed, or rg. Use semantic code inspection tools for those files. Reading project documentation (docs/.md), build manifests (go.mod, Makefile), and visible test files in the task workspace is permitted. Use semedit semantic tools for supported source code modifications. Shell commands for builds and tests are allowed. When done, output DONE.

Initial Workspace State (Before Edit)
package request

import (
	"errors"
	"strings"
)

type Request struct {
	ID      string
	Kind    string
	Payload []byte
}

func (r Request) Validate() error {
	if r.ID == "" {
		return errors.New("invalid request")
	}
	return nil
}

func Normalize(kind string) string {
	kind = strings.TrimSpace(kind)
	kind = strings.ToLower(kind)
	return kind
}

func FindByID(requests []Request, id string) (Request, bool) {
	for _, r := range requests {
		if r.ID == id {
			return r, true
		}
	}
	return Request{}, false
}
MetricVanilla (Small)MCP (Small)Δ (Small)Vanilla (Large)MCP (Large)Δ (Large)
Wall-Clock Latency54.39s132.43s+143.5%64.94s122.87s+89.2%
Process Start → First Event0.13s0.13s—0.13s0.53s—
First Event → First Tool Call5.61s10.79s—5.73s4.32s—
MCP Initialize → First Semantic Call——————
MCP Server Start → Initialize——————
Top-Level User Turns110%110%
Internal Tool Cycles722+214.3%819+137.5%
Initial Load / Discovery Turns31-66.7%52-60.0%
MCP Discovery / Schema Turns00—00—
Tool Invocations (per run)722+214.3%819+137.5%
Output Tokens19651889-3.9%16311657+1.6%
Reasoning / Thinking Tokens282563+99.6%489754+54.2%
Total Input Tokens180826518540+186.8%195703330519+68.9%
Cached Input Tokens161792470528+190.8%176896293120+65.7%
Uncached Input Tokens1903448012+152.2%1880737399+98.9%
Cost0.11610.2683+131.1%0.11770.1969+67.2%
Cached vs Uncached Token Ratio8.50:19.80:1+15.3%9.41:17.84:1-16.7%
Oracle L1: Mutation PolicyPASSPASS—PASSPASS—
Oracle L2: AST InvariantsPASSPASS—PASSPASS—
Oracle L3: Clean BuildPASSPASS—PASSPASS—
Oracle L4: Verification TestPASSPASS—PASSPASS—
Semantic Tool Invocation Verified (per run)N/APASS—N/APASS—
Baseline vs Semedit Agentic in Small Context
  • Vanilla (Baseline vs Semedit Agentic in Small Context) Edit: File request/request.go modified (34 lines -> 41 lines)
  • Semedit MCP (Baseline vs Semedit Agentic in Small Context) Edit: File request/request.go modified (34 lines -> 41 lines)
#VanillaSemedit MCP
1✓ ✓
/bin/zsh -lc "rg --files -g 'AGENTS.md' -g 'PROJECT_BRIEF.md' -g '*.go' | head -150 && \
rg -n 'type Request struct|func \\(.*Request.*Validate|func Normalize|\\.ID\\b|ErrInvalidRequest' --glob '*.go' ."
✓ ✓
/bin/zsh -lc "pwd && \
rg --files -g 'PROJECT_BRIEF.md' -g 'docs/*.md' -g 'Makefile' -g 'go.mod' -g '*_test.go' | head -100"
2✓ ✓
/bin/zsh -lc "cat request/request.go && \
rg -n 'request\\.Request|Request\\{' --glob '*.go' . && \
rg -n '\\.ID' --glob '*.go' ."
semedit/semantic_assertion_mode (✓ ✗): read assertion source .: read /Users/alessandro/.codex/worktrees/5ed4eaeb-36d5-4c10-aa76-b12d80abec0e/semantic-editor/.scratch/benchmarks/run_codex_semedit_small-default_task-12-request-identity-migration_1790660929311259000: is a directory
{
  "dry_run": true,
  "file": ".",
  "mode": "relax"
}
3✓ ✓
/bin/zsh -lc 'cat gateway/handler.go notifications/notifier.go queue/queue.go request/request_test.go gateway/handler_test.go storage/requests_test.go'
? ✗
/bin/zsh -lc 'cat docs/identity-model.md && \
cat go.mod && \
cat Makefile'
4? ✗
/bin/zsh -lc "python3 - <<'PY'
from pathlib import Path
import os, tempfile
root=Path('.')
changes={
'request/request.go': [
('ID      string','RequestID string'),
('if r.ID == \"\" {\\n\\t\\treturn errors.New(\"invalid request\")\\n\\t}', 'if r.RequestID == \"\" {\\n\\t\\treturn fmt.Errorf(\"%w: request ID is empty\", ErrInvalidRequest)\\n\\t}'),
('\"errors\"','\"errors\"\\n\\t\"fmt\"'),
('type Request struct {','var ErrInvalidRequest = errors.New(\"invalid request\")\\n\\ntype Request struct {'),
('func Normalize(kind string) string {\\n\\tkind = strings.TrimSpace(kind)\\n\\tkind = strings.ToLower(kind)\\n\\treturn kind\\n}', 'func Normalize(kind string) string {\\n\\treturn normalizeKind(kind)\\n}\\n\\nfunc normalizeKind(kind string) string {\\n\\tkind = strings.TrimSpace(kind)\\n\\tkind = strings.ToLower(kind)\\n\\treturn kind\\n}'),
('r.ID == id','r.RequestID == id'),
],
'gateway/handler.go':[('r.ID, err','r.RequestID, err')],
'notifications/notifier.go':[('r.ID','r.RequestID'),('r.Request.ID','r.Request.RequestID')],
'queue/queue.go':[('r.ID','r.RequestID')],
'scheduler/jobs.go':[('left.Request.ID','left.Request.RequestID'),('right.Request.ID','right.Request.RequestID'),('job.Request.ID','job.Request.RequestID'),('r.ID','r.RequestID')],
'storage/requests.go':[('r.ID','r.RequestID')],
'reporting/report.go':[('r.Request.ID','r.Request.RequestID')],
'correlation/identities.go':[('[]string{r.ID, resp.ID, review.ID}','[]string{r.RequestID, resp.ID, review.ID}')],
'request/request_test.go':[
('\"testing\"','\"testing\"\\n\\t\"errors\"'),
('if err == nil {','if "'!errors.Is(err, ErrInvalidRequest) {'"'),
('Request{\"req-7\", \"audit\", nil}','Request{RequestID: \"req-7\", Kind: \"audit\"}'),
('[]Request{{\"other\", \"audit\", nil}, want}','[]Request{{RequestID: \"other\", Kind: \"audit\"}, want}'),
],
'gateway/handler_test.go':[('request.Request{\"req-1\", \"audit\", nil}','request.Request{RequestID: \"req-1\", Kind: \"audit\"}')],
'storage/requests_test.go':[('request.Request{\"req-2\", \"\", nil}','request.Request{RequestID: \"req-2\"}')],
}
for name, pairs in changes.items():
 p=root/name; data=p.read_text()
 for old,new in pairs:
  if old not in data: raise SystemExit(f'missing expected text in {name}: {old"'!r}'"')
  data=data.replace(old,new)
 st=p.stat(); fd,tmp=tempfile.mkstemp(prefix=p.name+'.',dir=p.parent)
 with os.fdopen(fd,'w') as f:
  f.write(data); f.flush(); os.fsync(f.fileno())
 os.chmod(tmp, st.st_mode); os.replace(tmp,p)
PY
rg -n '\\.ID\\b|Request\\{' --glob '*.go' .
gofmt -w request/request.go request/request_test.go gateway/handler.go gateway/handler_test.go notifications/notifier.go queue/queue.go scheduler/jobs.go storage/requests.go storage/requests_test.go reporting/report.go correlation/identities.go
go test ./..."
✓ ✓
/bin/zsh -lc 'cat request/request_test.go && \
cat gateway/handler_test.go && \
cat storage/requests_test.go && \
cat response/response_test.go && \
cat review/review_test.go'
5✓ ✓
/bin/zsh -lc 'cat request/request_test.go request/request.go'
semedit/semantic_lookup (✓ ✓)
{
  "language": "go",
  "symbol": "Request"
}
6✓ ✓
/bin/zsh -lc "python3 - <<'PY'
from pathlib import Path
import os,tempfile
p=Path('request/request_test.go'); s=p.read_text(); old='import \"testing\"\\n\\t\"errors\"'; new='import (\\n\\t\"errors\"\\n\\t\"testing\"\\n)'; assert old in s; s=s.replace(old,new); st=p.stat(); fd,tmp=tempfile.mkstemp(dir=p.parent,prefix=p.name+'.');
with os.fdopen(fd,'w') as f: f.write(s); f.flush(); os.fsync(f.fileno())
os.chmod(tmp,st.st_mode); os.replace(tmp,p)
PY
gofmt -w request/request_test.go
go test ./... && \
go build ./... && \
git diff --check && \
git status --short && \
git diff --stat"
semedit/semantic_lookup (✓ ✓)
{
  "language": "go",
  "symbol": "Normalize"
}
7✓ ✓
/bin/zsh -lc "git status --short -- . && \
git diff -- request/request.go request/request_test.go gateway/handler.go notifications/notifier.go queue/queue.go scheduler/jobs.go storage/requests.go storage/requests_test.go reporting/report.go correlation/identities.go gateway/handler_test.go && \
git diff --check -- . && \
rg -n '\\br\\.ID\\b|Request\\.ID|RequestID' --glob '*.go' ."
semedit/semantic_inspect_symbol (✓ ✓)
{
  "file": "request/request.go",
  "symbol": "Request"
}
8—semedit/semantic_inspect_symbol (✓ ✓)
{
  "file": "request/request.go",
  "symbol": "Normalize"
}
9—semedit/semantic_inspect_symbol (✓ ✓)
{
  "file": "request/request.go",
  "symbol": "Request.Validate"
}
10—semedit/semantic_find_references (✓ ✓)
{
  "file": "request/request.go",
  "language": "go",
  "symbol": "Request"
}
11—✓ ✓
/bin/zsh -lc "python3 -c 'from pathlib import Path; import os,tempfile; p=Path(\"docs/SUBOPTIMAL_TOOLS.md\"); old=p.read_text() if p.exists() else \"# Suboptimal tool behavior\\n\"; entry=\"\\n- Tool: "'`semantic_assertion_mode`; target: workspace directory (`.`). The call failed because this test-assertion tool requires a Go test file, not a directory. No source changes or workaround were needed; root cause was an exploratory call with an invalid target.'"\\n\"; fd,tmp=tempfile.mkstemp(dir=p.parent,prefix=\".SUBOPTIMAL_TOOLS.\"); f=os.fdopen(fd,\"w\"); f.write(old+entry); f.flush(); os.fsync(f.fileno()); f.close(); os.replace(tmp,p)'"
12—semedit/semantic_lookup (✓ ✓)
{
  "file": "request/request.go",
  "language": "go",
  "symbol": "Request.ID"
}
13—semedit/semantic_rename (✓ ✓)
{
  "file": "request/request.go",
  "language": "go",
  "symbol": "Request.ID",
  "to": "RequestID"
}
14—semedit/semantic_insert_decl (✓ ✓)
{
  "access_modifier": "public",
  "file": "request/request.go",
  "source": "var ErrInvalidRequest = errors.New(\"invalid request\")"
}
15—semedit/semantic_replace_body (✓ ✓)
{
  "auto_organize_imports": true,
  "body": "if r.RequestID == \"\" {\n\t\treturn fmt.Errorf(\"invalid request: %w\", ErrInvalidRequest)\n\t}\n\treturn nil",
  "file": "request/request.go",
  "symbol": "Request.Validate"
}
16—semedit/semantic_replace_body (✓ ✓)
{
  "body": "return normalizeKind(kind)",
  "file": "request/request.go",
  "symbol": "Normalize"
}
17—semedit/semantic_insert_function (✓ ✓)
{
  "access_modifier": "private",
  "file": "request/request.go",
  "placement": "private_end",
  "source": "func normalizeKind(kind string) string {\n\tkind = strings.TrimSpace(kind)\n\tkind = strings.ToLower(kind)\n\treturn kind\n}"
}
18—semedit/semantic_inspect_symbol (✓ ✓)
{
  "file": "request/request.go",
  "symbol": "Normalize"
}
19—semedit/semantic_find_references (✓ ✓)
{
  "file": "request/request.go",
  "language": "go",
  "symbol": "Request.RequestID"
}
20—semedit/semantic_inspect_symbol (✓ ✓)
{
  "file": "request/request.go",
  "symbol": "normalizeKind"
}
21—semedit/semantic_inspect_symbol (✓ ✓)
{
  "file": "request/request.go",
  "symbol": "Request.Validate"
}
22—✓ ✓
/bin/zsh -lc 'git status --short && \
git diff -- go.mod go.sum'
Baseline vs Semedit Agentic in Large Context
  • Vanilla (Baseline vs Semedit Agentic in Large Context) Edit: File request/request.go modified (34 lines -> 40 lines)
  • Semedit MCP (Baseline vs Semedit Agentic in Large Context) Edit: File request/request.go modified (34 lines -> 41 lines)
#VanillaSemedit MCP
1✓ ✓
/bin/zsh -lc "pwd && \
rg --files -g 'AGENTS.md' -g 'PROJECT_BRIEF.md' -g 'go.mod' -g 'Makefile' -g '*.go' | head -160"
✓ ✓
/bin/zsh -lc "pwd && \
rg --files -g 'AGENTS.md' -g 'PROJECT_BRIEF.md' -g 'Makefile' -g 'docs/*.md' -g '*test.go' | head -80"
2✓ ✓
/bin/zsh -lc 'rg --files | sort | head -120 && \
cat request/request.go && \
cat go.mod'
✓ ✓
/bin/zsh -lc 'cat docs/identity-model.md && \
cat request/request_test.go && \
rg --files | head -60'
3✓ ✓
/bin/zsh -lc "rg -n '\\.ID|\\bID\\b|Normalize|invalid request' --glob '*.go' && \
cat docs/identity-model.md && \
cat request/request_test.go && \
cat storage/requests.go"
semedit/semantic_lookup (✓ ✓)
{
  "symbol": "Request.Validate"
}
4? ✗
/bin/zsh -lc 'for f in gateway/handler.go notifications/notifier.go correlation/identities.go reporting/report.go queue/queue.go scheduler/jobs.go api/router.go; do echo ===$f; cat "$f"; done && \
rg -n '"'request\\.Request\\{|Request\\{' --glob '*.go'"
semedit/semantic_lookup (✓ ✓)
{
  "symbol": "Request"
}
5✓ ✓
/bin/zsh -lc "for f in gateway/handler.go notifications/notifier.go correlation/identities.go reporting/report.go queue/queue.go scheduler/jobs.go api/router.go; do printf '\\n=== %s\\n' \""'$f"; cat "$f"; done; rg -n '"'request\\.Request\\{|Request\\{' --glob '*.go'"
semedit/semantic_lookup (✓ ✓)
{
  "symbol": "Normalize"
}
6✓ ✓
/bin/zsh -lc "python3 - <<'PY'
from pathlib import Path
p=Path('request/request.go')
s=p.read_text()
s=s.replace('ID      string','RequestID string').replace('if r.ID == \"\" {\\n\\t\\treturn errors.New(\"invalid request\")\\n\\t}', 'if r.RequestID == \"\" {\\n\\t\\treturn ErrInvalidRequest\\n\\t}')
s=s.replace('type Request struct {', 'var ErrInvalidRequest = errors.New(\"invalid request\")\\n\\ntype Request struct {')
s=s.replace('func Normalize(kind string) string {\\n\\tkind = strings.TrimSpace(kind)\\n\\tkind = strings.ToLower(kind)\\n\\treturn kind\\n}', 'func Normalize(kind string) string {\\n\\treturn normalizeKind(kind)\\n}\\n\\nfunc normalizeKind(kind string) string {\\n\\tkind = strings.TrimSpace(kind)\\n\\tkind = strings.ToLower(kind)\\n\\treturn kind\\n}')
s=s.replace('r.ID', 'r.RequestID')
p.write_text(s)
repls={
'gateway/handler.go': [('r.ID','r.RequestID')],
'notifications/notifier.go': [('r.ID','r.RequestID'),('r.Request.ID','r.Request.RequestID')],
'correlation/identities.go': [('r.ID, resp.ID','r.RequestID, resp.ID')],
'reporting/report.go': [('r.Request.ID','r.Request.RequestID')],
'queue/queue.go': [('r.ID','r.RequestID')],
'scheduler/jobs.go': [('left.Request.ID','left.Request.RequestID'),('right.Request.ID','right.Request.RequestID'),('job.Request.ID','job.Request.RequestID'),('r.ID','r.RequestID')],
'storage/requests.go': [('r.ID','r.RequestID')],
}
for name, pairs in repls.items():
 p=Path(name); s=p.read_text()
 for a,b in pairs: s=s.replace(a,b)
 p.write_text(s)
PY
gofmt -w request/request.go gateway/handler.go notifications/notifier.go correlation/identities.go reporting/report.go queue/queue.go scheduler/jobs.go storage/requests.go
rg -n '\\.ID|RequestID|ErrInvalidRequest|normalizeKind' --glob '*.go'"
semedit/semantic_lookup (✓ ✓)
{
  "symbol": "FindByID"
}
7✓ ✓
/bin/zsh -lc 'go test ./...'
semedit/semantic_inspect_symbol (✓ ✓)
{
  "file": "request/request.go",
  "symbol": "Request.Validate"
}
8✓ ✓
/bin/zsh -lc 'git status --short && \
git diff -- go.mod go.sum && \
git diff --stat && \
git diff'
semedit/semantic_inspect_symbol (✓ ✓)
{
  "file": "request/request.go",
  "symbol": "Request"
}
9—semedit/semantic_inspect_symbol (✓ ✓)
{
  "file": "request/request.go",
  "symbol": "Normalize"
}
10—semedit/semantic_rename (✓ ✓)
{
  "symbol": "Request.ID",
  "to": "RequestID"
}
11—semedit/semantic_insert_decl (✓ ✓)
{
  "access_modifier": "public",
  "file": "request/request.go",
  "source": "var ErrInvalidRequest = errors.New(\"invalid request\")"
}
12—semedit/semantic_replace_body (✓ ✓)
{
  "auto_organize_imports": true,
  "body": "if r.RequestID == \"\" {\n\t\treturn fmt.Errorf(\"%w: request ID is empty\", ErrInvalidRequest)\n\t}\n\treturn nil",
  "file": "request/request.go",
  "symbol": "Request.Validate"
}
13—semedit/semantic_replace_body (✓ ✓)
{
  "body": "return normalizeKind(kind)",
  "file": "request/request.go",
  "symbol": "Normalize"
}
14—semedit/semantic_insert_function (✓ ✓)
{
  "access_modifier": "private",
  "file": "request/request.go",
  "source": "func normalizeKind(kind string) string {\n\tkind = strings.TrimSpace(kind)\n\tkind = strings.ToLower(kind)\n\treturn kind\n}"
}
15—semedit/semantic_find_references (✓ ✓)
{
  "file": "request/request.go",
  "symbol": "Request.RequestID"
}
16—semedit/semantic_inspect_symbol (✓ ✓)
{
  "file": "request/request.go",
  "symbol": "Request"
}
17—semedit/semantic_inspect_symbol (✓ ✓)
{
  "file": "request/request.go",
  "symbol": "normalizeKind"
}
18—semedit/semantic_inspect_symbol (✓ ✓)
{
  "file": "request/request.go",
  "symbol": "Request.Validate"
}
19—semedit/semantic_inspect_symbol (✓ ✓)
{
  "file": "request/request.go",
  "symbol": "ErrInvalidRequest"
}

default prompt · prescriptive MCP instructions · readwrite semedit restriction

SettingValue
Test casetask-12-request-identity-migration
Targetcodex/gpt-6-luna/medium
Prompt variantdefault
MCP server instructionsprescriptive
Semedit arm restrictionreadwrite
Fixturetestdata/bench/task_12_request_identity_migration.txtar

Vanilla LLM Prompt:

You are forbidden to modify protected files: “go.mod”, “go.sum”.

Migrate the request identity API in this large multi-package Go service. Rename only Request.ID to Request.RequestID and update every semantic use across packages; Response.ID and Review.ID are separate identities and must remain unchanged, including the many syntactically identical r.ID expressions. Add a package sentinel ErrInvalidRequest and return it from Validate when the request ID is empty, preserving error wrapping and callers. Extract the normalization block from the existing exported request.Normalize function into an unexported normalizeKind helper and keep Normalize exported with the same behavior and signature. Preserve module metadata and existing tests. Verification differs by editing method: when making ordinary file edits, run the project build and tests and ensure both pass; when using semedit, treat clean compiler diagnostic deltas returned by its mutation commands as build-clean evidence and do not run a separate build or test command. Do not use semantic editing MCP tools; use standard file editing. When done, output DONE.

Semedit MCP Prompt:

You are forbidden to modify protected files: “go.mod”, “go.sum”.

Migrate the request identity API in this large multi-package Go service. Rename only Request.ID to Request.RequestID and update every semantic use across packages; Response.ID and Review.ID are separate identities and must remain unchanged, including the many syntactically identical r.ID expressions. Add a package sentinel ErrInvalidRequest and return it from Validate when the request ID is empty, preserving error wrapping and callers. Extract the normalization block from the existing exported request.Normalize function into an unexported normalizeKind helper and keep Normalize exported with the same behavior and signature. Preserve module metadata and existing tests. Verification differs by editing method: when making ordinary file edits, run the project build and tests and ensure both pass; when using semedit, treat clean compiler diagnostic deltas returned by its mutation commands as build-clean evidence and do not run a separate build or test command. Do not inspect Go implementation files (non-test .go) with shell commands such as cat, sed, or rg. Use semantic code inspection tools for those files. Reading project documentation (docs/.md), build manifests (go.mod, Makefile), and visible test files in the task workspace is permitted. Use semedit semantic tools for supported source code modifications. Shell commands for builds and tests are allowed. When done, output DONE.

Initial Workspace State (Before Edit)
package request

import (
	"errors"
	"strings"
)

type Request struct {
	ID      string
	Kind    string
	Payload []byte
}

func (r Request) Validate() error {
	if r.ID == "" {
		return errors.New("invalid request")
	}
	return nil
}

func Normalize(kind string) string {
	kind = strings.TrimSpace(kind)
	kind = strings.ToLower(kind)
	return kind
}

func FindByID(requests []Request, id string) (Request, bool) {
	for _, r := range requests {
		if r.ID == id {
			return r, true
		}
	}
	return Request{}, false
}
MetricVanilla (Small)MCP (Small)Δ (Small)Vanilla (Large)MCP (Large)Δ (Large)
Wall-Clock Latency59.64s131.65s+120.8%50.42s91.96s+82.4%
Process Start → First Event0.14s0.14s—0.14s0.14s—
First Event → First Tool Call6.56s8.11s—5.61s6.38s—
MCP Initialize → First Semantic Call——————
MCP Server Start → Initialize——————
Top-Level User Turns110%110%
Internal Tool Cycles826+225.0%614+133.3%
Initial Load / Discovery Turns36+100.0%32-33.3%
MCP Discovery / Schema Turns00—00—
Tool Invocations (per run)826+225.0%614+133.3%
Output Tokens20372001-1.8%16021901+18.7%
Reasoning / Thinking Tokens373772+107.0%330931+182.1%
Total Input Tokens180548503280+178.8%177090450662+154.5%
Cached Input Tokens162816445440+173.6%160768408320+154.0%
Uncached Input Tokens1773257840+226.2%1632242342+159.4%
Cost0.11520.2906+152.4%0.10510.2433+131.4%
Cached vs Uncached Token Ratio9.18:17.70:1-16.1%9.85:19.64:1-2.1%
Oracle L1: Mutation PolicyPASSPASS—PASSPASS—
Oracle L2: AST InvariantsPASSPASS—PASSPASS—
Oracle L3: Clean BuildPASSPASS—PASSPASS—
Oracle L4: Verification TestPASSPASS—PASSPASS—
Semantic Tool Invocation Verified (per run)N/APASS—N/APASS—
Baseline vs Semedit Agentic in Small Context
  • Vanilla (Baseline vs Semedit Agentic in Small Context) Edit: File request/request.go modified (34 lines -> 40 lines)
  • Semedit MCP (Baseline vs Semedit Agentic in Small Context) Edit: File request/request.go modified (34 lines -> 41 lines)
#VanillaSemedit MCP
1✓ ✓
/bin/zsh -lc "pwd && \
rg --files -g 'AGENTS.md' -g 'PROJECT_BRIEF.md' -g 'go.mod' -g 'go.sum' -g 'Makefile' -g '*.go' | head -200"
✓ ✓
/bin/zsh -lc "pwd && \
rg --files -g 'PROJECT_BRIEF.md' -g 'docs/*.md' -g 'go.mod' -g 'Makefile' -g '*_test.go' | head -100"
2✓ ✓
/bin/zsh -lc "find .. -name AGENTS.md -o -name PROJECT_BRIEF.md; rg -n '\\.ID\\b|\\bID\\b|Normalize|Validate|ErrInvalid' --glob '*.go'; cat go.mod; rg --files"
✓ ✓
/bin/zsh -lc 'git status --short'
3✓ ✓
/bin/zsh -lc 'cat AGENTS.override.md && \
cat request/request.go && \
cat request/request_test.go && \
cat docs/identity-model.md && \
cat gateway/handler.go && \
cat notifications/notifier.go && \
cat queue/queue.go && \
cat storage/requests.go && \
cat scheduler/jobs.go && \
cat correlation/identities.go && \
cat reporting/report.go'
✓ ✓
/bin/zsh -lc 'cat request/request_test.go'
4✓ ✓
/bin/zsh -lc "python3 - <<'PY'
from pathlib import Path
files = {
'request/request.go': '''package request

import (
\\t\"errors\"
\\t\"strings\"
)

var ErrInvalidRequest = errors.New(\"invalid request\")

type Request struct {
\\tRequestID string
\\tKind      string
\\tPayload   []byte
}

func (r Request) Validate() error {
\\tif r.RequestID == \"\" {
\\t\\treturn ErrInvalidRequest
\\t}
\\treturn nil
}

func Normalize(kind string) string {
\\treturn normalizeKind(kind)
}

func normalizeKind(kind string) string {
\\tkind = strings.TrimSpace(kind)
\\tkind = strings.ToLower(kind)
\\treturn kind
}

func FindByID(requests []Request, id string) (Request, bool) {
\\tfor _, r := range requests {
\\t\\tif r.RequestID == id {
\\t\\t\\treturn r, true
\\t\\t}
\\t}
\\treturn Request{}, false
}
''',
'gateway/handler.go': None,
'notifications/notifier.go': None,
'queue/queue.go': None,
'storage/requests.go': None,
'scheduler/jobs.go': None,
'correlation/identities.go': None,
'reporting/report.go': None,
'request/request_test.go': None,
'storage/requests_test.go': None,
}
for name, content in files.items():
    if content is not None:
        path = Path(name)
        tmp = path.with_suffix(path.suffix + '.tmp')
        tmp.write_text(content)
        tmp.replace(path)
# Field-specific edits kept explicit so separate ID domains are untouched.
replacements = {
'gateway/handler.go': [('r.ID', 'r.RequestID')],
'notifications/notifier.go': [('r.ID', 'r.RequestID'), ('r.Request.ID', 'r.Request.RequestID')],
'queue/queue.go': [('r.ID', 'r.RequestID')],
'storage/requests.go': [('r.ID', 'r.RequestID')],
'scheduler/jobs.go': [('left.Request.ID', 'left.Request.RequestID'), ('right.Request.ID', 'right.Request.RequestID'), ('job.Request.ID', 'job.Request.RequestID'), ('r.ID', 'r.RequestID')],
'correlation/identities.go': [('r.ID', 'r.RequestID')],
'reporting/report.go': [('r.Request.ID', 'r.Request.RequestID')],
'request/request_test.go': [('import \"testing\"', 'import (\\n\\t\"errors\"\\n\\t\"testing\"\\n)'), ('err := (Request{Kind: \"audit\"}).Validate()', 'err := (Request{Kind: \"audit\"}).Validate()\\n\\tif "'!errors.Is(err, ErrInvalidRequest) {'"\\n\\t\\tt.Fatalf(\"Validate() error = %v, want ErrInvalidRequest\", err)\\n\\t}'), ('want := Request{\"req-7\", \"audit\", nil}', 'want := Request{RequestID: \"req-7\", Kind: \"audit\"}'), ('FindByID([]Request{{\"other\", \"audit\", nil}, want}', 'FindByID([]Request{{RequestID: \"other\", Kind: \"audit\"}, want}')],
'storage/requests_test.go': [('request.Request{\"req-2\", \"\", nil}', 'request.Request{RequestID: \"req-2\"}')],
}
for name, pairs in replacements.items():
    path = Path(name)
    content = path.read_text()
    for old, new in pairs:
        if old not in content:
            raise SystemExit(f'missing expected text in {name}: {old}')
        content = content.replace(old, new)
    tmp = path.with_suffix(path.suffix + '.tmp')
    tmp.write_text(content)
    tmp.replace(path)
PY
gofmt -w request/request.go request/request_test.go gateway/handler.go notifications/notifier.go queue/queue.go storage/requests.go storage/requests_test.go scheduler/jobs.go correlation/identities.go reporting/report.go
rg -n '\\.ID\\b|RequestID|ErrInvalidRequest|Normalize|normalizeKind' --glob '*.go'
git diff -- go.mod go.sum"
✓ ✓
/bin/zsh -lc 'cat docs/identity-model.md && \
cat go.mod'
5✓ ✓
/bin/zsh -lc 'go build ./...'
✓ ✓
/bin/zsh -lc "rg --files -g 'Makefile' -g 'PROJECT_BRIEF.md' -g 'AGENTS.md' -g 'AGENTS.override.md'"
6✓ ✓
/bin/zsh -lc 'go test ./...'
✓ ✓
/bin/zsh -lc 'cat response/response_test.go && \
cat review/review_test.go && \
cat storage/requests_test.go && \
cat gateway/handler_test.go'
7✓ ✓
/bin/zsh -lc 'git status --short && \
git diff --check && \
git diff --stat && \
git diff -- go.mod go.sum && \
git diff'
semedit/semantic_outline (✓ ✓)
{
  "include_tests": true,
  "include_unexported": true,
  "language": "go",
  "path": "."
}
8✓ ✓
/bin/zsh -lc 'git rev-parse --show-toplevel && \
git diff -- request/request.go && \
git check-ignore -v request/request.go || \
true && \
git status --short --untracked-files=all -- request'
semedit/semantic_lookup (✓ ✓)
{
  "language": "go",
  "symbol": "Request"
}
9—semedit/semantic_lookup (✓ ✓)
{
  "language": "go",
  "symbol": "Normalize"
}
10—semedit/semantic_lookup (✓ ✓)
{
  "language": "go",
  "symbol": "Validate"
}
11—semedit/semantic_inspect_symbol (✓ ✓)
{
  "file": "request/request.go",
  "language": "go",
  "symbol": "Request"
}
12—semedit/semantic_inspect_symbol (✓ ✓)
{
  "file": "request/request.go",
  "language": "go",
  "symbol": "Request.Validate"
}
13—semedit/semantic_inspect_symbol (✓ ✓)
{
  "file": "request/request.go",
  "language": "go",
  "symbol": "Normalize"
}
14—semedit/semantic_find_references (✓ ✓)
{
  "file": "request/request.go",
  "language": "go",
  "symbol": "Request.ID"
}
15—semedit/semantic_rename (✓ ✓)
{
  "file": "request/request.go",
  "language": "go",
  "symbol": "Request.ID",
  "to": "RequestID"
}
16—semedit/semantic_insert_decl (✓ ✓)
{
  "access_modifier": "public",
  "file": "request/request.go",
  "source": "var ErrInvalidRequest = errors.New(\"invalid request\")"
}
17—semedit/semantic_replace_body (✓ ✓)
{
  "auto_organize_imports": true,
  "body": "if r.RequestID == \"\" {\n\t\treturn fmt.Errorf(\"validate request: %w\", ErrInvalidRequest)\n\t}\n\treturn nil",
  "file": "request/request.go",
  "symbol": "Request.Validate"
}
18—semedit/semantic_replace_body (✓ ✓)
{
  "body": "return normalizeKind(kind)",
  "file": "request/request.go",
  "symbol": "Normalize"
}
19—semedit/semantic_insert_function (✓ ✓)
{
  "access_modifier": "private",
  "file": "request/request.go",
  "placement": "private_end",
  "source": "func normalizeKind(kind string) string {\n\tkind = strings.TrimSpace(kind)\n\tkind = strings.ToLower(kind)\n\treturn kind\n}"
}
20—semedit/semantic_inspect_symbol (✓ ✓)
{
  "file": "request/request.go",
  "language": "go",
  "symbol": "Request"
}
21—semedit/semantic_inspect_symbol (✓ ✓)
{
  "file": "request/request.go",
  "language": "go",
  "symbol": "Request.Validate"
}
22—semedit/semantic_inspect_symbol (✓ ✓)
{
  "file": "request/request.go",
  "language": "go",
  "symbol": "Normalize"
}
23—semedit/semantic_inspect_symbol (✓ ✓)
{
  "file": "request/request.go",
  "language": "go",
  "symbol": "normalizeKind"
}
24—semedit/semantic_find_references (✓ ✓)
{
  "file": "request/request.go",
  "language": "go",
  "symbol": "Request.RequestID"
}
25—semedit/semantic_inspect_symbol (✓ ✓)
{
  "file": "request/request.go",
  "language": "go",
  "symbol": "ErrInvalidRequest"
}
26—semedit/semantic_find_references (✓ ✓)
{
  "file": "request/request.go",
  "language": "go",
  "symbol": "Request.Validate"
}
Baseline vs Semedit Agentic in Large Context
  • Vanilla (Baseline vs Semedit Agentic in Large Context) Edit: File request/request.go modified (34 lines -> 40 lines)
  • Semedit MCP (Baseline vs Semedit Agentic in Large Context) Edit: File request/request.go modified (34 lines -> 41 lines)
#VanillaSemedit MCP
1✓ ✓
/bin/zsh -lc "pwd && \
rg --files -g 'PROJECT_BRIEF.md' -g 'AGENTS.md' -g '*.go' -g 'Makefile' -g 'go.mod' -g 'go.sum' | head -200"
✓ ✓
/bin/zsh -lc "pwd && \
rg --files -g 'PROJECT_BRIEF.md' -g 'Makefile' -g 'docs/*.md' -g '*test.go' -g 'go.mod' -g 'go.sum' | head -80"
2✓ ✓
/bin/zsh -lc "cat request/request.go && \
rg -n '\\bRequest\\b|\\.ID\\b|ErrInvalid|Normalize|Validate' --glob '*.go'"
✓ ✓
/bin/zsh -lc "cat PROJECT_BRIEF.md 2>/dev/null; cat docs/identity-model.md; cat Makefile; cat go.mod; rg --files -g 'AGENTS.md' -g 'AGENTS.override.md'"
3✓ ✓
/bin/zsh -lc "rg --files -g 'README*' -g 'Makefile' -g 'go.mod' -g 'AGENTS.md' -g 'PROJECT_BRIEF.md'; cat go.mod; cat gateway/handler.go notifications/notifier.go queue/queue.go storage/requests.go scheduler/jobs.go correlation/identities.go reporting/report.go; rg -n 'Normalize\\(|Request\\{' --glob '*.go'"
semedit/semantic_lookup (✓ ✓)
{
  "language": "go",
  "symbol": "Request"
}
4✓ ✓
/bin/zsh -lc "python3 - <<'PY'
from pathlib import Path
files = [
    'request/request.go', 'gateway/handler.go', 'notifications/notifier.go',
    'queue/queue.go', 'storage/requests.go', 'scheduler/jobs.go',
    'correlation/identities.go', 'reporting/report.go',
]
replacements = {
    'request/request.go': [('ID      string', 'RequestID string'), ('r.ID', 'r.RequestID')],
    'gateway/handler.go': [('r.ID', 'r.RequestID')],
    'notifications/notifier.go': [('r.ID', 'r.RequestID'), ('r.Request.ID', 'r.Request.RequestID')],
    'queue/queue.go': [('r.ID', 'r.RequestID')],
    'storage/requests.go': [('r.ID', 'r.RequestID')],
    'scheduler/jobs.go': [('left.Request.ID', 'left.Request.RequestID'), ('right.Request.ID', 'right.Request.RequestID'), ('job.Request.ID', 'job.Request.RequestID'), ('r.ID', 'r.RequestID')],
    'correlation/identities.go': [('r.ID', 'r.RequestID')],
    'reporting/report.go': [('r.Request.ID', 'r.Request.RequestID')],
}
for name in files:
    p = Path(name)
    data = p.read_bytes()
    text = data.decode()
    for old, new in replacements[name]: text = text.replace(old, new)
    if name == 'request/request.go':
        text = text.replace('type Request struct {', 'var ErrInvalidRequest = errors.New(\"invalid request\")\\n\\ntype Request struct {')
        text = text.replace('return errors.New(\"invalid request\")', 'return ErrInvalidRequest')
        text = text.replace('func Normalize(kind string) string {\\n\\tkind = strings.TrimSpace(kind)\\n\\tkind = strings.ToLower(kind)\\n\\treturn kind\\n}', 'func Normalize(kind string) string {\\n\\treturn normalizeKind(kind)\\n}\\n\\nfunc normalizeKind(kind string) string {\\n\\tkind = strings.TrimSpace(kind)\\n\\tkind = strings.ToLower(kind)\\n\\treturn kind\\n}')
    tmp = p.with_name(p.name + '.tmp')
    with open(tmp, 'wb') as f:
        f.write(text.encode())
        f.flush()
        import os
        os.fsync(f.fileno())
    tmp.replace(p)
PY
rg -n '\\bRequest\\b|\\.ID\\b|ErrInvalidRequest|normalizeKind' --glob '*.go'"
semedit/semantic_inspect_symbol (✓ ✓)
{
  "file": "request/request.go",
  "symbol": "Request"
}
5✓ ✓
/bin/zsh -lc 'gofmt -w request/request.go gateway/handler.go notifications/notifier.go queue/queue.go storage/requests.go scheduler/jobs.go correlation/identities.go reporting/report.go && \
go build ./... && \
go test ./...'
semedit/semantic_inspect_symbol (✓ ✓)
{
  "file": "request/request.go",
  "symbol": "Normalize"
}
6✓ ✓
/bin/zsh -lc 'git diff --stat && \
git diff -- request/request.go gateway/handler.go notifications/notifier.go queue/queue.go storage/requests.go scheduler/jobs.go correlation/identities.go reporting/report.go && \
git status --short'
semedit/semantic_outline (✓ ✓)
{
  "include_tests": false,
  "path": "request"
}
7—semedit/semantic_inspect_symbol (✓ ✓)
{
  "file": "request/request.go",
  "symbol": "Validate"
}
8—✓ ✓
/bin/zsh -lc 'cat request/request_test.go'
9—semedit/semantic_rename (✓ ✓)
{
  "symbol": "Request.ID",
  "to": "RequestID"
}
10—semedit/semantic_insert_decl (✓ ✓)
{
  "file": "request/request.go",
  "source": "var ErrInvalidRequest = errors.New(\"invalid request\")"
}
11—semedit/semantic_batch (✓ ✓)
{
  "auto_organize_imports": true,
  "edits": [
    {
      "params": {
        "auto_organize_imports": true,
        "body": "if r.RequestID == \"\" {\n\t\treturn fmt.Errorf(\"%w: request ID is empty\", ErrInvalidRequest)\n\t}\n\treturn nil",
        "file": "request/request.go",
        "symbol": "Request.Validate"
      },
      "tool": "semantic_replace_body"
    },
    {
      "params": {
        "body": "return normalizeKind(kind)",
        "file": "request/request.go",
        "symbol": "Normalize"
      },
      "tool": "semantic_replace_body"
    },
    {
      "params": {
        "access_modifier": "private",
        "file": "request/request.go",
        "source": "func normalizeKind(kind string) string {\n\tkind = strings.TrimSpace(kind)\n\tkind = strings.ToLower(kind)\n\treturn kind\n}"
      },
      "tool": "semantic_insert_function"
    }
  ]
}
12—semedit/semantic_find_references (✓ ✓)
{
  "file": "request/request.go",
  "language": "go",
  "symbol": "Request.RequestID"
}
13—✓ ✓
/bin/zsh -lc 'git status --short'
14—✓ ✓
/bin/zsh -lc 'git status --short --untracked-files=all -- request/request.go correlation/identities.go gateway/handler.go notifications/notifier.go queue/queue.go reporting/report.go scheduler/jobs.go storage/requests.go go.mod go.sum'

default prompt · prescriptive MCP instructions · readwrite semedit restriction

SettingValue
Test casetask-12-request-identity-migration
Targetcodex/gpt-6-luna/medium
Prompt variantdefault
MCP server instructionsprescriptive
Semedit arm restrictionreadwrite
Fixturetestdata/bench/task_12_request_identity_migration.txtar

Vanilla LLM Prompt:

You are forbidden to modify protected files: “go.mod”, “go.sum”.

Migrate the request identity API in this large multi-package Go service. Rename only Request.ID to Request.RequestID and update every semantic use across packages; Response.ID and Review.ID are separate identities and must remain unchanged, including the many syntactically identical r.ID expressions. Add a package sentinel ErrInvalidRequest and return it from Validate when the request ID is empty, preserving error wrapping and callers. Extract the normalization block from the existing exported request.Normalize function into an unexported normalizeKind helper and keep Normalize exported with the same behavior and signature. Preserve module metadata and existing tests. Verification differs by editing method: when making ordinary file edits, run the project build and tests and ensure both pass; when using semedit, treat clean compiler diagnostic deltas returned by its mutation commands as build-clean evidence and do not run a separate build or test command. Do not use semantic editing MCP tools; use standard file editing. When done, output DONE.

Semedit MCP Prompt:

You are forbidden to modify protected files: “go.mod”, “go.sum”.

Migrate the request identity API in this large multi-package Go service. Rename only Request.ID to Request.RequestID and update every semantic use across packages; Response.ID and Review.ID are separate identities and must remain unchanged, including the many syntactically identical r.ID expressions. Add a package sentinel ErrInvalidRequest and return it from Validate when the request ID is empty, preserving error wrapping and callers. Extract the normalization block from the existing exported request.Normalize function into an unexported normalizeKind helper and keep Normalize exported with the same behavior and signature. Preserve module metadata and existing tests. Verification differs by editing method: when making ordinary file edits, run the project build and tests and ensure both pass; when using semedit, treat clean compiler diagnostic deltas returned by its mutation commands as build-clean evidence and do not run a separate build or test command. Do not inspect Go implementation files (non-test .go) with shell commands such as cat, sed, or rg. Use semantic code inspection tools for those files. Reading project documentation (docs/.md), build manifests (go.mod, Makefile), and visible test files in the task workspace is permitted. Use semedit semantic tools for supported source code modifications. Shell commands for builds and tests are allowed. When done, output DONE.

Initial Workspace State (Before Edit)
package request

import (
	"errors"
	"strings"
)

type Request struct {
	ID      string
	Kind    string
	Payload []byte
}

func (r Request) Validate() error {
	if r.ID == "" {
		return errors.New("invalid request")
	}
	return nil
}

func Normalize(kind string) string {
	kind = strings.TrimSpace(kind)
	kind = strings.ToLower(kind)
	return kind
}

func FindByID(requests []Request, id string) (Request, bool) {
	for _, r := range requests {
		if r.ID == id {
			return r, true
		}
	}
	return Request{}, false
}
MetricVanilla (Small)MCP (Small)Δ (Small)Vanilla (Large)MCP (Large)Δ (Large)
Wall-Clock Latency51.17s114.88s+124.5%55.86s176.23s+215.5%
Process Start → First Event0.13s0.14s—0.13s0.14s—
First Event → First Tool Call4.49s5.25s—4.81s11.99s—
MCP Initialize → First Semantic Call——————
MCP Server Start → Initialize——————
Top-Level User Turns110%110%
Internal Tool Cycles822+175.0%625+316.7%
Initial Load / Discovery Turns41-75.0%32-33.3%
MCP Discovery / Schema Turns00—00—
Tool Invocations (per run)822+175.0%625+316.7%
Output Tokens19791770-10.6%22032563+16.3%
Reasoning / Thinking Tokens227707+211.5%3111390+346.9%
Total Input Tokens220711285091+29.2%155432493828+217.7%
Cached Input Tokens203264241664+18.9%138496442112+219.2%
Uncached Input Tokens1744743427+148.9%1693651716+205.4%
Cost0.12200.1999+63.9%0.10840.2892+166.8%
Cached vs Uncached Token Ratio11.65:15.56:1-52.2%8.18:18.55:1+4.5%
Oracle L1: Mutation PolicyPASSPASS—PASSPASS—
Oracle L2: AST InvariantsPASSPASS—PASSPASS—
Oracle L3: Clean BuildPASSPASS—PASSPASS—
Oracle L4: Verification TestPASSPASS—PASSPASS—
Semantic Tool Invocation Verified (per run)N/APASS—N/APASS—
Baseline vs Semedit Agentic in Small Context
  • Vanilla (Baseline vs Semedit Agentic in Small Context) Edit: File request/request.go modified (34 lines -> 40 lines)
  • Semedit MCP (Baseline vs Semedit Agentic in Small Context) Edit: File request/request.go modified (34 lines -> 41 lines)
#VanillaSemedit MCP
1✓ ✓
/bin/zsh -lc "pwd && \
rg --files -g 'AGENTS.md' -g 'PROJECT_BRIEF.md' -g '*.go' | head -200"
✓ ✓
/bin/zsh -lc "pwd && \
rg --files -g 'PROJECT_BRIEF.md' -g 'docs/*.md' -g 'Makefile' -g 'go.mod' -g '*_test.go' -g 'AGENTS*' | head -100"
2✓ ✓
/bin/zsh -lc "sed -n '1,240p' request/request.go && \
rg -n '\\.ID|\\bID\\b|Normalize|Validate' --glob '*.go'"
semedit/semantic_assertion_mode (✓ ✓)
{
  "dry_run": true,
  "file": "request/request_test.go",
  "mode": "relax"
}
3✓ ✓
/bin/zsh -lc "rg --files -g 'Makefile' -g 'go.mod' -g 'README*' -g 'AGENTS*' -g 'PROJECT_BRIEF.md' && \
rg -n 'Request\\{' --glob '*.go' && \
git status --short"
✓ ✓
/bin/zsh -lc 'cat docs/identity-model.md && \
cat go.mod && \
cat request/request_test.go && \
cat response/response_test.go && \
cat review/review_test.go && \
cat storage/requests_test.go'
4✓ ✓
/bin/zsh -lc "cat go.mod && \
sed -n '1,120p' gateway/handler.go && \
sed -n '1,100p' notifications/notifier.go && \
sed -n '1,100p' queue/queue.go && \
sed -n '1,100p' scheduler/jobs.go && \
sed -n '1,100p' reporting/report.go"
semedit/semantic_outline (✓ ✓)
{
  "include_unexported": true,
  "path": "request"
}
5✓ ✓
/bin/zsh -lc "python3 - <<'PY'
from pathlib import Path
import os, tempfile
files = {
'request/request.go': '''package request

import (
\\t\"errors\"
\\t\"strings\"
)

var ErrInvalidRequest = errors.New(\"invalid request\")

type Request struct {
\\tRequestID string
\\tKind      string
\\tPayload   []byte
}

func (r Request) Validate() error {
\\tif r.RequestID == \"\" {
\\t\\treturn ErrInvalidRequest
\\t}
\\treturn nil
}

func normalizeKind(kind string) string {
\\tkind = strings.TrimSpace(kind)
\\tkind = strings.ToLower(kind)
\\treturn kind
}

func Normalize(kind string) string {
\\treturn normalizeKind(kind)
}

func FindByID(requests []Request, id string) (Request, bool) {
\\tfor _, r := range requests {
\\t\\tif r.RequestID == id {
\\t\\t\\treturn r, true
\\t\\t}
\\t}
\\treturn Request{}, false
}
''',
'gateway/handler.go': None,
'notifications/notifier.go': None,
'queue/queue.go': None,
'scheduler/jobs.go': None,
'reporting/report.go': None,
'request/request_test.go': None,
'gateway/handler_test.go': None,
'storage/requests_test.go': None,
}
for name, content in files.items():
    if content is None:
        content = Path(name).read_text()
    if name "'!= '"'request/request.go':
        # Target request-typed values only; distinguish expressions using known ownership.
        replacements = {
            'r.ID': 'r.RequestID',
            'r.Request.ID': 'r.Request.RequestID',
            'left.Request.ID': 'left.Request.RequestID',
            'right.Request.ID': 'right.Request.RequestID',
            'job.Request.ID': 'job.Request.RequestID',
        }
        # Files here contain Request identity expressions only, except handler response.ID and storage RequestRecord IDs.
        if name == 'gateway/handler.go':
            content = content.replace('r.ID', 'r.RequestID')
        elif name == 'notifications/notifier.go':
            content = content.replace('r.ID', 'r.RequestID').replace('r.Request.ID', 'r.Request.RequestID')
        elif name == 'queue/queue.go':
            content = content.replace('r.ID', 'r.RequestID')
        elif name == 'scheduler/jobs.go':
            content = content.replace('left.Request.ID', 'left.Request.RequestID').replace('right.Request.ID', 'right.Request.RequestID').replace('job.Request.ID', 'job.Request.RequestID').replace('r.ID', 'r.RequestID')
        elif name == 'reporting/report.go':
            content = content.replace('r.Request.ID', 'r.Request.RequestID')
        elif name == 'request/request_test.go':
            content = content.replace('Request{\"req-', 'Request{\"req-')
        elif name == 'gateway/handler_test.go':
            pass
        elif name == 'storage/requests_test.go':
            content = content.replace('request.Request{\"req-', 'request.Request{\"req-')
    p=Path(name)
    p.parent.mkdir(parents=True, exist_ok=True)
    fd,tmp=tempfile.mkstemp(dir=p.parent, prefix=p.name+'.tmp.')
    try:
        with os.fdopen(fd,'w') as f:
            f.write(content); f.flush(); os.fsync(f.fileno())
        os.replace(tmp,p)
    finally:
        if os.path.exists(tmp): os.unlink(tmp)
PY
rg -n '\\.ID|Request\\{' --glob '*.go'"
semedit/semantic_inspect_symbol (✓ ✓)
{
  "file": "request/request.go",
  "symbol": "Request"
}
6✓ ✓
/bin/zsh -lc "cat correlation/identities.go storage/requests.go && \
rg -n '\\.Request\\.ID|r\\.ID' --glob '*.go'"
semedit/semantic_inspect_symbol (✓ ✓)
{
  "file": "request/request.go",
  "symbol": "Request.Validate"
}
7✓ ✓
/bin/zsh -lc "python3 - <<'PY'
from pathlib import Path
import os,tempfile
changes={'storage/requests.go': [('r.ID','r.RequestID')], 'correlation/identities.go':[('{r.ID, resp.ID, review.ID}','{r.RequestID, resp.ID, review.ID}') ]}
for name,pairs in changes.items():
 p=Path(name); s=p.read_text()
 for a,b in pairs:s=s.replace(a,b)
 fd,t=tempfile.mkstemp(dir=p.parent,prefix=p.name+'.tmp.')
 with os.fdopen(fd,'w') as f:f.write(s);f.flush();os.fsync(f.fileno())
 os.replace(t,p)
PY
gofmt -w request/request.go gateway/handler.go notifications/notifier.go queue/queue.go scheduler/jobs.go reporting/report.go storage/requests.go correlation/identities.go
go test ./..."
semedit/semantic_inspect_symbol (✓ ✓)
{
  "file": "request/request.go",
  "symbol": "Normalize"
}
8✓ ✓
/bin/zsh -lc 'go build ./... && \
git diff -- request/request.go gateway/handler.go notifications/notifier.go queue/queue.go scheduler/jobs.go reporting/report.go storage/requests.go correlation/identities.go && \
git status --short -- go.mod go.sum'
semedit/semantic_inspect_symbol (✓ ✓)
{
  "file": "request/request.go",
  "symbol": "FindByID"
}
9—semedit/semantic_rename (✓ ✓)
{
  "symbol": "Request.ID",
  "to": "RequestID"
}
10—semedit/semantic_insert_decl (✓ ✓)
{
  "file": "request/request.go",
  "source": "var ErrInvalidRequest = errors.New(\"invalid request\")"
}
11—semedit/semantic_replace_body (✓ ✓)
{
  "auto_organize_imports": true,
  "body": "if r.RequestID == \"\" {\n\t\treturn fmt.Errorf(\"invalid request: %w\", ErrInvalidRequest)\n\t}\n\treturn nil",
  "file": "request/request.go",
  "symbol": "Request.Validate"
}
12—semedit/semantic_insert_function (✓ ✓)
{
  "access_modifier": "private",
  "file": "request/request.go",
  "source": "func normalizeKind(kind string) string {\n\tkind = strings.TrimSpace(kind)\n\tkind = strings.ToLower(kind)\n\treturn kind\n}"
}
13—semedit/semantic_replace_body (✓ ✓)
{
  "body": "return normalizeKind(kind)",
  "file": "request/request.go",
  "symbol": "Normalize"
}
14—semedit/semantic_find_references (✓ ✓)
{
  "file": "request/request.go",
  "symbol": "Request.RequestID"
}
15—semedit/semantic_inspect_symbol (✓ ✓)
{
  "file": "request/request.go",
  "symbol": "Request.Validate"
}
16—semedit/semantic_inspect_symbol (✓ ✓)
{
  "file": "request/request.go",
  "symbol": "Normalize"
}
17—semedit/semantic_inspect_symbol (✓ ✓)
{
  "file": "request/request.go",
  "symbol": "ErrInvalidRequest"
}
18—semedit/semantic_outline (✓ ✓)
{
  "include_tests": true,
  "include_unexported": true,
  "path": "."
}
19—semedit/semantic_inspect_symbol (✓ ✓)
{
  "file": "request/request.go",
  "symbol": "Normalize"
}
20—semedit/semantic_inspect_symbol (✓ ✓)
{
  "file": "request/request.go",
  "symbol": "normalizeKind"
}
21—semedit/semantic_inspect_symbol (✓ ✓)
{
  "file": "request/request.go",
  "symbol": "ErrInvalidRequest"
}
22—✓ ✓
/bin/zsh -lc 'git status --short && \
git diff --exit-code -- go.mod go.sum'
Baseline vs Semedit Agentic in Large Context
  • Vanilla (Baseline vs Semedit Agentic in Large Context) Edit: File request/request.go modified (34 lines -> 40 lines)
  • Semedit MCP (Baseline vs Semedit Agentic in Large Context) Edit: File request/request.go modified (34 lines -> 41 lines)
#VanillaSemedit MCP
1✓ ✓
/bin/zsh -lc "pwd && \
rg --files -g 'AGENTS.md' -g 'PROJECT_BRIEF.md' -g 'go.mod' -g 'request*.go' -g '*request*' | head -200"
✓ ✓
/bin/zsh -lc "pwd && \
rg --files -g 'PROJECT_BRIEF.md' -g 'docs/*.md' -g 'Makefile' -g 'go.mod' -g 'go.sum' -g '*_test.go' | head -80"
2✓ ✓
/bin/zsh -lc "git status --short && \
cat go.mod && \
sed -n '1,240p' request/request.go && \
sed -n '1,260p' request/request_test.go && \
rg -n '\\bRequest\\b|\\.ID\\b|Normalize\\(' --glob '*.go'"
✓ ✓
/bin/zsh -lc 'cat docs/identity-model.md && \
cat go.mod'
3✓ ✓
/bin/zsh -lc 'for f in gateway/handler.go notifications/notifier.go queue/queue.go review/review.go storage/requests.go scheduler/jobs.go reporting/report.go correlation/identities.go response/response.go; do echo "--- $f"; cat "$f"; done; rg -n '"'request\\.Request\\s*\\{|Request\\s*\\{' --glob '*.go'"
semedit/semantic_assertion_mode (✓ ✓)
{
  "dry_run": true,
  "file": "request/request_test.go",
  "mode": "relax"
}
4✓ ✓
/bin/zsh -lc "python3 - <<'PY'
from pathlib import Path
import os, tempfile
root=Path('.')
changes={
'request/request.go':'''package request

import (
\\t\"errors\"
\\t\"strings\"
)

var ErrInvalidRequest = errors.New(\"invalid request\")

type Request struct {
\\tRequestID string
\\tKind      string
\\tPayload   []byte
}

func (r Request) Validate() error {
\\tif r.RequestID == \"\" {
\\t\\treturn ErrInvalidRequest
\\t}
\\treturn nil
}

func Normalize(kind string) string {
\\treturn normalizeKind(kind)
}

func normalizeKind(kind string) string {
\\tkind = strings.TrimSpace(kind)
\\tkind = strings.ToLower(kind)
\\treturn kind
}

func FindByID(requests []Request, id string) (Request, bool) {
\\tfor _, r := range requests {
\\t\\tif r.RequestID == id {
\\t\\t\\treturn r, true
\\t\\t}
\\t}
\\treturn Request{}, false
}
''',
'gateway/handler.go':None,
'notifications/notifier.go':None,
'queue/queue.go':None,
'scheduler/jobs.go':None,
'reporting/report.go':None,
'correlation/identities.go':None,
'request/request_test.go':'''package request

import (
\\t\"errors\"
\\t\"testing\"
)

func TestValidateRejectsMissingRequestID(t *testing.T) {
\\terr := (Request{Kind: \"audit\"}).Validate()
\\tif "'!errors.Is(err, ErrInvalidRequest) {
'"\\t\\tt.Fatalf(\"Validate() error = %v, want ErrInvalidRequest\", err)
\\t}
}

func TestNormalizeTrimsAndLowercases(t *testing.T) {
\\tif got := Normalize(\"  Audit \"); got "'!= "audit" {
'"\\t\\tt.Fatalf(\"Normalize() = %q, want audit\", got)
\\t}
}

func TestFindByIDUsesRequestIdentity(t *testing.T) {
\\twant := Request{RequestID: \"req-7\", Kind: \"audit\"}
\\tgot, ok := FindByID([]Request{{RequestID: \"other\", Kind: \"audit\"}, want}, \"req-7\")
\\tif "'!ok || \
got.Kind != want.Kind {
'"\\t\\tt.Fatalf(\"FindByID() = %#v, %t; want %#v, true\", got, ok, want)
\\t}
}
''',
'gateway/handler_test.go':None,
'storage/requests_test.go':None,
}
# Directly construct intentional changes per file; all writes use temp + fsync + replace.
for name, content in changes.items():
    if content is None: continue
    path=root/name
    fd,tmp=tempfile.mkstemp(prefix=path.name+'.', dir=path.parent)
    try:
        with os.fdopen(fd,'w') as f:
            f.write(content); f.flush(); os.fsync(f.fileno())
        os.replace(tmp,path)
    finally:
        if os.path.exists(tmp): os.unlink(tmp)
replacements={
'gateway/handler.go': [('r.ID','r.RequestID')],
'notifications/notifier.go': [('r.ID','r.RequestID'), ('r.Request.ID','r.Request.RequestID')],
'queue/queue.go': [('r.ID','r.RequestID')],
'scheduler/jobs.go': [('left.Request.ID','left.Request.RequestID'),('right.Request.ID','right.Request.RequestID'),('job.Request.ID','job.Request.RequestID'),('r.ID','r.RequestID')],
'reporting/report.go': [('r.Request.ID','r.Request.RequestID')],
'correlation/identities.go': [('r.ID','r.RequestID')],
'gateway/handler_test.go': [('request.Request{\"req-1\", \"audit\", nil}', 'request.Request{RequestID: \"req-1\", Kind: \"audit\"}')],
'storage/requests_test.go': [('request.Request{\"req-2\", \"\", nil}', 'request.Request{RequestID: \"req-2\"}')],
}
for name,pairs in replacements.items():
    path=root/name; content=path.read_text()
    for old,new in pairs: content=content.replace(old,new)
    fd,tmp=tempfile.mkstemp(prefix=path.name+'.', dir=path.parent)
    try:
        with os.fdopen(fd,'w') as f: f.write(content); f.flush(); os.fsync(f.fileno())
        os.replace(tmp,path)
    finally:
        if os.path.exists(tmp): os.unlink(tmp)
PY
gofmt -w request/request.go request/request_test.go gateway/handler.go notifications/notifier.go queue/queue.go scheduler/jobs.go reporting/report.go correlation/identities.go gateway/handler_test.go storage/requests_test.go
rg -n '\\b(r|left\\.Request|right\\.Request|job\\.Request)\\.ID\\b|request\\.Request\\s*\\{' --glob '*.go'"
semedit/semantic_lookup (✓ ✓)
{
  "symbol": "Request"
}
5✓ ✓
/bin/zsh -lc "cat notifications/notifier.go scheduler/jobs.go storage/requests.go correlation/identities.go && \
rg -n '\\.ID\\b' --glob '*.go'"
semedit/semantic_lookup (✓ ✓)
{
  "symbol": "Validate"
}
6✓ ✓
/bin/zsh -lc "python3 - <<'PY'
from pathlib import Path
import os, tempfile
p=Path('storage/requests.go'); s=p.read_text().replace('record.ID == r.ID','record.ID == r.RequestID')
fd,tmp=tempfile.mkstemp(prefix=p.name+'.', dir=p.parent)
try:
    with os.fdopen(fd,'w') as f: f.write(s); f.flush(); os.fsync(f.fileno())
    os.replace(tmp,p)
finally:
    if os.path.exists(tmp): os.unlink(tmp)
PY
gofmt -w storage/requests.go
go build ./... && \
go test ./..."
semedit/semantic_lookup (✓ ✓)
{
  "symbol": "Normalize"
}
7—semedit/semantic_inspect_symbol (✓ ✓)
{
  "symbol": "Request"
}
8—semedit/semantic_inspect_symbol (✓ ✓)
{
  "symbol": "Request.Validate"
}
9—semedit/semantic_inspect_symbol (✓ ✓)
{
  "symbol": "Normalize"
}
10—semedit/semantic_find_references (✓ ✓)
{
  "symbol": "Request"
}
11—semedit/semantic_lookup (✓ ✓)
{
  "symbol": "Request.ID"
}
12—semedit/semantic_rename (✓ ✓)
{
  "symbol": "Request.ID",
  "to": "RequestID"
}
13—semedit/semantic_insert_decl (✓ ✓)
{
  "access_modifier": "public",
  "file": "request/request.go",
  "source": "var ErrInvalidRequest = errors.New(\"invalid request\")"
}
14—semedit/semantic_insert_function (✓ ✓)
{
  "access_modifier": "private",
  "file": "request/request.go",
  "source": "func normalizeKind(kind string) string {\n\tkind = strings.TrimSpace(kind)\n\tkind = strings.ToLower(kind)\n\treturn kind\n}"
}
15—semedit/semantic_replace_body (✓ ✓)
{
  "body": "return normalizeKind(kind)",
  "file": "request/request.go",
  "symbol": "Normalize"
}
16—semedit/semantic_replace_body (✓ ✓)
{
  "auto_organize_imports": true,
  "body": "if r.RequestID == \"\" {\n\t\treturn fmt.Errorf(\"invalid request: %w\", ErrInvalidRequest)\n\t}\n\treturn nil",
  "file": "request/request.go",
  "symbol": "Request.Validate"
}
17—semedit/semantic_find_references (✓ ✓)
{
  "symbol": "Request.RequestID"
}
18—✓ ✓
/bin/zsh -lc 'cat request/request_test.go && \
cat gateway/handler_test.go && \
cat storage/requests_test.go'
19—semedit/semantic_inspect_symbol (✓ ✓)
{
  "symbol": "Request.Validate"
}
20—✓ ✓
/bin/zsh -lc 'git status --short'
21—semedit/semantic_inspect_symbol (✓ ✓)
{
  "symbol": "ErrInvalidRequest"
}
22—semedit/semantic_inspect_symbol (✓ ✓)
{
  "symbol": "Request"
}
23—semedit/semantic_inspect_symbol (✓ ✓)
{
  "symbol": "Normalize"
}
24—semedit/semantic_inspect_symbol (✓ ✓)
{
  "symbol": "normalizeKind"
}
25—semedit/semantic_lookup (✓ ✗): resolve Request.ID: symbol not found
{
  "symbol": "Request.ID"
}

default prompt · prescriptive MCP instructions · readwrite semedit restriction

SettingValue
Test casetask-12-request-identity-migration
Targetcodex/gpt-6-luna/medium
Prompt variantdefault
MCP server instructionsprescriptive
Semedit arm restrictionreadwrite
Fixturetestdata/bench/task_12_request_identity_migration.txtar

Vanilla LLM Prompt:

You are forbidden to modify protected files: “go.mod”, “go.sum”.

Migrate the request identity API in this large multi-package Go service. Rename only Request.ID to Request.RequestID and update every semantic use across packages; Response.ID and Review.ID are separate identities and must remain unchanged, including the many syntactically identical r.ID expressions. Add a package sentinel ErrInvalidRequest and return it from Validate when the request ID is empty, preserving error wrapping and callers. Extract the normalization block from the existing exported request.Normalize function into an unexported normalizeKind helper and keep Normalize exported with the same behavior and signature. Preserve module metadata and existing tests. Verification differs by editing method: when making ordinary file edits, run the project build and tests and ensure both pass; when using semedit, treat clean compiler diagnostic deltas returned by its mutation commands as build-clean evidence and do not run a separate build or test command. Do not use semantic editing MCP tools; use standard file editing. When done, output DONE.

Semedit MCP Prompt:

You are forbidden to modify protected files: “go.mod”, “go.sum”.

Migrate the request identity API in this large multi-package Go service. Rename only Request.ID to Request.RequestID and update every semantic use across packages; Response.ID and Review.ID are separate identities and must remain unchanged, including the many syntactically identical r.ID expressions. Add a package sentinel ErrInvalidRequest and return it from Validate when the request ID is empty, preserving error wrapping and callers. Extract the normalization block from the existing exported request.Normalize function into an unexported normalizeKind helper and keep Normalize exported with the same behavior and signature. Preserve module metadata and existing tests. Verification differs by editing method: when making ordinary file edits, run the project build and tests and ensure both pass; when using semedit, treat clean compiler diagnostic deltas returned by its mutation commands as build-clean evidence and do not run a separate build or test command. Do not inspect Go implementation files (non-test .go) with shell commands such as cat, sed, or rg. Use semantic code inspection tools for those files. Reading project documentation (docs/.md), build manifests (go.mod, Makefile), and visible test files in the task workspace is permitted. Use semedit semantic tools for supported source code modifications. Shell commands for builds and tests are allowed. When done, output DONE.

Initial Workspace State (Before Edit)
package request

import (
	"errors"
	"strings"
)

type Request struct {
	ID      string
	Kind    string
	Payload []byte
}

func (r Request) Validate() error {
	if r.ID == "" {
		return errors.New("invalid request")
	}
	return nil
}

func Normalize(kind string) string {
	kind = strings.TrimSpace(kind)
	kind = strings.ToLower(kind)
	return kind
}

func FindByID(requests []Request, id string) (Request, bool) {
	for _, r := range requests {
		if r.ID == id {
			return r, true
		}
	}
	return Request{}, false
}
MetricVanilla (Small)MCP (Small)Δ (Small)Vanilla (Large)MCP (Large)Δ (Large)
Wall-Clock Latency48.47s125.75s+159.5%59.15s102.15s+72.7%
Process Start → First Event0.14s0.13s—0.14s0.15s—
First Event → First Tool Call5.04s7.05s—6.22s6.97s—
MCP Initialize → First Semantic Call——————
MCP Server Start → Initialize——————
Top-Level User Turns110%110%
Internal Tool Cycles518+260.0%720+185.7%
Initial Load / Discovery Turns32-33.3%31-66.7%
MCP Discovery / Schema Turns00—00—
Tool Invocations (per run)518+260.0%720+185.7%
Output Tokens17922205+23.0%16101499-6.9%
Reasoning / Thinking Tokens1531095+615.7%393515+31.0%
Total Input Tokens130080282425+117.1%172616473102+174.1%
Cached Input Tokens115200237568+106.2%156672424704+171.1%
Uncached Input Tokens1488044857+201.5%1594448398+203.5%
Cost0.09030.2128+135.6%0.10410.2523+142.5%
Cached vs Uncached Token Ratio7.74:15.30:1-31.6%9.83:18.78:1-10.7%
Oracle L1: Mutation PolicyPASSPASS—PASSPASS—
Oracle L2: AST InvariantsPASSPASS—PASSPASS—
Oracle L3: Clean BuildPASSPASS—PASSPASS—
Oracle L4: Verification TestPASSPASS—PASSPASS—
Semantic Tool Invocation Verified (per run)N/APASS—N/APASS—
Baseline vs Semedit Agentic in Small Context
  • Vanilla (Baseline vs Semedit Agentic in Small Context) Edit: File request/request.go modified (34 lines -> 41 lines)
  • Semedit MCP (Baseline vs Semedit Agentic in Small Context) Edit: File request/request.go modified (34 lines -> 40 lines)
#VanillaSemedit MCP
1✓ ✓
/bin/zsh -lc "pwd && \
rg --files -g 'PROJECT_BRIEF.md' -g 'go.mod' -g '*request*' -g 'AGENTS*' -g 'Makefile' | head -200 && \
rg -n 'type Request|func \\(.*Request.*\\) Validate|func Normalize|ErrInvalidRequest|\\.ID' --glob '*.go'"
✓ ✓
/bin/zsh -lc "pwd && \
rg --files -g 'PROJECT_BRIEF.md' -g 'docs/*.md' -g 'Makefile' -g 'go.mod' -g '*test.go' -g 'AGENTS.md' -g 'AGENTS.override.md' | head -100"
2✓ ✓
/bin/zsh -lc "cat go.mod && \
cat request/request.go && \
cat request/request_test.go && \
cat gateway/handler.go && \
cat scheduler/jobs.go && \
cat notifications/notifier.go && \
cat reporting/report.go && \
cat storage/requests.go && \
cat queue/queue.go && \
rg -n 'request\\.Request|Request\\{' --glob '*.go'"
✓ ✓
/bin/zsh -lc 'cat docs/identity-model.md && \
cat go.mod && \
git status --short'
3✓ ✓
/bin/zsh -lc 'cat correlation/identities.go; cat gateway/handler_test.go; cat storage/requests_test.go; rg --files | sort'
semedit/semantic_lookup (✓ ✓)
{
  "language": "go",
  "symbol": "Request"
}
4✓ ✓
/bin/zsh -lc "python3 - <<'PY'
from pathlib import Path
import os, tempfile
files = {
'request/request.go': '''package request

import (
\\t\"errors\"
\\t\"fmt\"
\\t\"strings\"
)

var ErrInvalidRequest = errors.New(\"invalid request\")

type Request struct {
\\tRequestID string
\\tKind      string
\\tPayload   []byte
}

func (r Request) Validate() error {
\\tif r.RequestID == \"\" {
\\t\\treturn fmt.Errorf(\"request ID is empty: %w\", ErrInvalidRequest)
\\t}
\\treturn nil
}

func Normalize(kind string) string {
\\treturn normalizeKind(kind)
}

func normalizeKind(kind string) string {
\\tkind = strings.TrimSpace(kind)
\\tkind = strings.ToLower(kind)
\\treturn kind
}

func FindByID(requests []Request, id string) (Request, bool) {
\\tfor _, r := range requests {
\\t\\tif r.RequestID == id {
\\t\\t\\treturn r, true
\\t\\t}
\\t}
\\treturn Request{}, false
}
''',
'request/request_test.go': '''package request

import (
\\t\"errors\"
\\t\"testing\"
)

func TestValidateRejectsMissingRequestID(t *testing.T) {
\\terr := (Request{Kind: \"audit\"}).Validate()
\\tif "'!errors.Is(err, ErrInvalidRequest) {
'"\\t\\tt.Fatalf(\"Validate() error = %v, want ErrInvalidRequest\", err)
\\t}
}

func TestNormalizeTrimsAndLowercases(t *testing.T) {
\\tif got := Normalize(\"  Audit \"); got "'!= "audit" {
'"\\t\\tt.Fatalf(\"Normalize() = %q, want audit\", got)
\\t}
}

func TestFindByIDUsesRequestIdentity(t *testing.T) {
\\twant := Request{RequestID: \"req-7\", Kind: \"audit\"}
\\tgot, ok := FindByID([]Request{{RequestID: \"other\", Kind: \"audit\"}, want}, \"req-7\")
\\tif "'!ok || \
got.Kind != want.Kind {
'"\\t\\tt.Fatalf(\"FindByID() = %#v, %t; want %#v, true\", got, ok, want)
\\t}
}
''',
'gateway/handler.go': None,
'gateway/handler_test.go': None,
'scheduler/jobs.go': None,
'notifications/notifier.go': None,
'reporting/report.go': None,
'storage/requests.go': None,
'storage/requests_test.go': None,
'queue/queue.go': None,
'correlation/identities.go': None,
}
for name, content in files.items():
    p = Path(name)
    if content is None:
        content = p.read_text()
    if name == 'gateway/handler.go': content = content.replace('r.ID, err)', 'r.RequestID, err)')
    elif name == 'gateway/handler_test.go': content = content.replace('request.Request{\"req-1\", \"audit\", nil}', 'request.Request{RequestID: \"req-1\", Kind: \"audit\"}')
    elif name == 'scheduler/jobs.go': content = content.replace('left.Request.ID', 'left.Request.RequestID').replace('right.Request.ID', 'right.Request.RequestID').replace('job.Request.ID', 'job.Request.RequestID').replace('r.ID', 'r.RequestID')
    elif name == 'notifications/notifier.go': content = content.replace('r.ID', 'r.RequestID').replace('r.Request.ID', 'r.Request.RequestID')
    elif name == 'reporting/report.go': content = content.replace('r.Request.ID', 'r.Request.RequestID')
    elif name == 'storage/requests.go': content = content.replace('record.ID == r.ID', 'record.ID == r.RequestID')
    elif name == 'storage/requests_test.go': content = content.replace('request.Request{\"req-2\", \"\", nil}', 'request.Request{RequestID: \"req-2\"}')
    elif name == 'queue/queue.go': content = content.replace('r.ID', 'r.RequestID')
    elif name == 'correlation/identities.go': content = content.replace('[]string{r.ID, resp.ID, review.ID}', '[]string{r.RequestID, resp.ID, review.ID}')
    data = content.encode()
    fd, tmp = tempfile.mkstemp(dir=p.parent, prefix='.' + p.name + '.')
    try:
        with os.fdopen(fd, 'wb') as f:
            f.write(data)
            f.flush()
            os.fsync(f.fileno())
        os.replace(tmp, p)
    finally:
        if os.path.exists(tmp): os.unlink(tmp)
PY

gofmt -w request/request.go request/request_test.go gateway/handler.go gateway/handler_test.go scheduler/jobs.go notifications/notifier.go reporting/report.go storage/requests.go storage/requests_test.go queue/queue.go correlation/identities.go
rg -n '\\.ID|Request\\{' --glob '*.go' "
semedit/semantic_lookup (✓ ✓)
{
  "language": "go",
  "symbol": "Normalize"
}
5✓ ✓
/bin/zsh -lc 'go build ./... && \
go test ./...'
semedit/semantic_lookup (✓ ✓)
{
  "language": "go",
  "symbol": "Validate"
}
6—semedit/semantic_inspect_symbol (✓ ✓)
{
  "file": "request/request.go",
  "language": "go",
  "symbol": "Request"
}
7—semedit/semantic_inspect_symbol (✓ ✓)
{
  "file": "request/request.go",
  "language": "go",
  "symbol": "Normalize"
}
8—semedit/semantic_inspect_symbol (✓ ✓)
{
  "file": "request/request.go",
  "language": "go",
  "symbol": "Request.Validate"
}
9—semedit/semantic_find_references (✓ ✓)
{
  "file": "request/request.go",
  "language": "go",
  "symbol": "Request"
}
10—✓ ✓
/bin/zsh -lc 'cat request/request_test.go && \
cat gateway/handler_test.go && \
cat storage/requests_test.go && \
cat response/response_test.go && \
cat review/review_test.go'
11—semedit/semantic_lookup (✓ ✓)
{
  "file": "request/request.go",
  "language": "go",
  "symbol": "Request.ID"
}
12—semedit/semantic_rename (✓ ✓)
{
  "file": "request/request.go",
  "language": "go",
  "symbol": "Request.ID",
  "to": "RequestID"
}
13—semedit/semantic_batch (✓ ✓)
{
  "edits": [
    {
      "params": {
        "access_modifier": "public",
        "file": "request/request.go",
        "source": "var ErrInvalidRequest = errors.New(\"invalid request\")"
      },
      "tool": "semantic_insert_decl"
    },
    {
      "params": {
        "body": "if r.RequestID == \"\" {\n\treturn ErrInvalidRequest\n}\nreturn nil",
        "file": "request/request.go",
        "symbol": "Request.Validate"
      },
      "tool": "semantic_replace_body"
    },
    {
      "params": {
        "body": "return normalizeKind(kind)",
        "file": "request/request.go",
        "symbol": "Normalize"
      },
      "tool": "semantic_replace_body"
    },
    {
      "params": {
        "file": "request/request.go",
        "placement": "private_end",
        "source": "func normalizeKind(kind string) string {\n\tkind = strings.TrimSpace(kind)\n\tkind = strings.ToLower(kind)\n\treturn kind\n}"
      },
      "tool": "semantic_insert_function"
    }
  ]
}
14—semedit/semantic_find_references (✓ ✓)
{
  "file": "request/request.go",
  "language": "go",
  "symbol": "Request.RequestID"
}
15—semedit/semantic_inspect_symbol (✓ ✓)
{
  "file": "request/request.go",
  "language": "go",
  "symbol": "Normalize"
}
16—semedit/semantic_inspect_symbol (✓ ✓)
{
  "file": "request/request.go",
  "language": "go",
  "symbol": "normalizeKind"
}
17—✓ ✓
/bin/zsh -lc 'git diff --exit-code -- go.mod go.sum && \
git status --short'
18—semedit/semantic_inspect_symbol (✓ ✓)
{
  "file": "request/request.go",
  "language": "go",
  "symbol": "ErrInvalidRequest"
}
Baseline vs Semedit Agentic in Large Context
  • Vanilla (Baseline vs Semedit Agentic in Large Context) Edit: File request/request.go modified (34 lines -> 40 lines)
  • Semedit MCP (Baseline vs Semedit Agentic in Large Context) Edit: File request/request.go modified (34 lines -> 40 lines)
#VanillaSemedit MCP
1✓ ✓
/bin/zsh -lc "pwd && \
rg --files -g 'AGENTS.md' -g 'go.mod' -g '*.go' | head -200"
✓ ✓
/bin/zsh -lc "pwd && \
rg --files -g 'PROJECT_BRIEF.md' -g 'docs/*.md' -g 'Makefile' -g 'go.mod' -g 'AGENTS.md'"
2✓ ✓
/bin/zsh -lc "cat go.mod && \
cat request/request.go && \
rg -n '\\bRequest\\b|\\.ID\\b|Normalize|Validate' --glob '*.go' ."
semedit/semantic_assertion_mode (✓ ✗): param "file" is required: invalid operation parameters
{
  "dry_run": true,
  "file": "",
  "mode": "restrict"
}
3✓ ✓
/bin/zsh -lc "rg -n 'Request\\{|Request\\.ID|\\.Request\\.ID|r\\.ID|entry\\.ID' --glob '*.go' . && \
ls -a"
✓ ✓
/bin/zsh -lc "cat docs/identity-model.md && \
cat go.mod && \
rg --files -g '*_test.go' | head -60"
4file_change (✓ ✓)semedit/semantic_lookup (✓ ✓)
{
  "symbol": "Request"
}
5file_change (✓ ✓)semedit/semantic_lookup (✓ ✓)
{
  "file": "request/request.go",
  "symbol": "Normalize"
}
6✓ ✓
/bin/zsh -lc "cat storage/requests.go && \
cat response/response.go && \
cat review/review.go && \
cat request/request.go && \
rg -n '\\.ID\\b' --glob '*.go' ."
semedit/semantic_find_references (✓ ✓)
{
  "file": "request/request.go",
  "symbol": "Request.ID"
}
7✓ ✓
/bin/zsh -lc 'gofmt -w request/request.go gateway/handler.go notifications/notifier.go queue/queue.go correlation/identities.go scheduler/jobs.go storage/requests.go reporting/report.go && \
go build ./... && \
go test ./...'
semedit/semantic_inspect_symbol (✓ ✓)
{
  "file": "request/request.go",
  "symbol": "Request"
}
8—semedit/semantic_lookup (✓ ✓)
{
  "file": "request/request.go",
  "symbol": "Validate"
}
9—semedit/semantic_inspect_symbol (✓ ✓)
{
  "file": "request/request.go",
  "symbol": "Normalize"
}
10—semedit/semantic_inspect_symbol (✓ ✓)
{
  "file": "request/request.go",
  "symbol": "Request.Validate"
}
11—✓ ✓
/bin/zsh -lc 'cat request/request_test.go'
12—semedit/semantic_rename (✓ ✓)
{
  "symbol": "Request.ID",
  "to": "RequestID"
}
13—semedit/semantic_replace_body (✓ ✓)
{
  "body": "if r.RequestID == \"\" {\n\t\treturn ErrInvalidRequest\n\t}\n\treturn nil",
  "file": "request/request.go",
  "symbol": "Request.Validate"
}
14—semedit/semantic_insert_decl (✓ ✓)
{
  "access_modifier": "public",
  "file": "request/request.go",
  "source": "var ErrInvalidRequest = errors.New(\"invalid request\")"
}
15—semedit/semantic_replace_body (✓ ✓)
{
  "body": "return normalizeKind(kind)",
  "file": "request/request.go",
  "symbol": "Normalize"
}
16—semedit/semantic_insert_function (✓ ✓)
{
  "access_modifier": "private",
  "file": "request/request.go",
  "placement": "private_end",
  "source": "func normalizeKind(kind string) string {\n\tkind = strings.TrimSpace(kind)\n\tkind = strings.ToLower(kind)\n\treturn kind\n}"
}
17—✓ ✓
/bin/zsh -lc 'git status --short -- go.mod go.sum'
18—semedit/semantic_find_references (✓ ✓)
{
  "file": "request/request.go",
  "symbol": "Request.RequestID"
}
19—semedit/semantic_inspect_symbol (✓ ✓)
{
  "file": "request/request.go",
  "symbol": "Request"
}
20—semedit/semantic_verify (✓ ✓)
{
  "check_only": true,
  "language": "go",
  "path": "."
}

default prompt · prescriptive MCP instructions · readwrite semedit restriction

SettingValue
Test casetask-12-request-identity-migration
Targetcodex/gpt-6-luna/medium
Prompt variantdefault
MCP server instructionsprescriptive
Semedit arm restrictionreadwrite
Fixturetestdata/bench/task_12_request_identity_migration.txtar

Vanilla LLM Prompt:

You are forbidden to modify protected files: “go.mod”, “go.sum”.

Migrate the request identity API in this large multi-package Go service. Rename only Request.ID to Request.RequestID and update every semantic use across packages; Response.ID and Review.ID are separate identities and must remain unchanged, including the many syntactically identical r.ID expressions. Add a package sentinel ErrInvalidRequest and return it from Validate when the request ID is empty, preserving error wrapping and callers. Extract the normalization block from the existing exported request.Normalize function into an unexported normalizeKind helper and keep Normalize exported with the same behavior and signature. Preserve module metadata and existing tests. Verification differs by editing method: when making ordinary file edits, run the project build and tests and ensure both pass; when using semedit, treat clean compiler diagnostic deltas returned by its mutation commands as build-clean evidence and do not run a separate build or test command. Do not use semantic editing MCP tools; use standard file editing. When done, output DONE.

Semedit MCP Prompt:

You are forbidden to modify protected files: “go.mod”, “go.sum”.

Migrate the request identity API in this large multi-package Go service. Rename only Request.ID to Request.RequestID and update every semantic use across packages; Response.ID and Review.ID are separate identities and must remain unchanged, including the many syntactically identical r.ID expressions. Add a package sentinel ErrInvalidRequest and return it from Validate when the request ID is empty, preserving error wrapping and callers. Extract the normalization block from the existing exported request.Normalize function into an unexported normalizeKind helper and keep Normalize exported with the same behavior and signature. Preserve module metadata and existing tests. Verification differs by editing method: when making ordinary file edits, run the project build and tests and ensure both pass; when using semedit, treat clean compiler diagnostic deltas returned by its mutation commands as build-clean evidence and do not run a separate build or test command. Do not inspect Go implementation files (non-test .go) with shell commands such as cat, sed, or rg. Use semantic code inspection tools for those files. Reading project documentation (docs/.md), build manifests (go.mod, Makefile), and visible test files in the task workspace is permitted. Use semedit semantic tools for supported source code modifications. Shell commands for builds and tests are allowed. When done, output DONE.

Initial Workspace State (Before Edit)
package request

import (
	"errors"
	"strings"
)

type Request struct {
	ID      string
	Kind    string
	Payload []byte
}

func (r Request) Validate() error {
	if r.ID == "" {
		return errors.New("invalid request")
	}
	return nil
}

func Normalize(kind string) string {
	kind = strings.TrimSpace(kind)
	kind = strings.ToLower(kind)
	return kind
}

func FindByID(requests []Request, id string) (Request, bool) {
	for _, r := range requests {
		if r.ID == id {
			return r, true
		}
	}
	return Request{}, false
}
MetricVanilla (Small)MCP (Small)Δ (Small)Vanilla (Large)MCP (Large)Δ (Large)
Wall-Clock Latency51.46s78.89s+53.3%54.05s102.84s+90.3%
Process Start → First Event0.14s0.14s—0.13s0.13s—
First Event → First Tool Call4.76s7.49s—4.71s8.03s—
MCP Initialize → First Semantic Call——————
MCP Server Start → Initialize——————
Top-Level User Turns110%110%
Internal Tool Cycles1115+36.4%718+157.1%
Initial Load / Discovery Turns32-33.3%32-33.3%
MCP Discovery / Schema Turns00—00—
Tool Invocations (per run)1115+36.4%718+157.1%
Output Tokens19261502-22.0%20041735-13.4%
Reasoning / Thinking Tokens90700+677.8%721797+10.5%
Total Input Tokens199670275756+38.1%188654367571+94.8%
Cached Input Tokens166656234496+40.7%152576325120+113.1%
Uncached Input Tokens3301441260+25.0%3607842451+17.7%
Cost0.14940.1893+26.7%0.16240.2191+34.9%
Cached vs Uncached Token Ratio5.05:15.68:1+12.6%4.23:17.66:1+81.1%
Oracle L1: Mutation PolicyPASSPASS—PASSPASS—
Oracle L2: AST InvariantsPASSPASS—PASSPASS—
Oracle L3: Clean BuildPASSPASS—PASSPASS—
Oracle L4: Verification TestPASSPASS—PASSPASS—
Semantic Tool Invocation Verified (per run)N/APASS—N/APASS—
Baseline vs Semedit Agentic in Small Context
  • Vanilla (Baseline vs Semedit Agentic in Small Context) Edit: File request/request.go modified (34 lines -> 41 lines)
  • Semedit MCP (Baseline vs Semedit Agentic in Small Context) Edit: File request/request.go modified (34 lines -> 41 lines)
#VanillaSemedit MCP
1✓ ✓
/bin/zsh -lc "pwd && \
rg --files -g 'AGENTS.md' -g 'PROJECT_BRIEF.md' -g '*.go' -g 'go.mod' -g 'go.sum' | head -200"
✓ ✓
/bin/zsh -lc "pwd && \
rg --files -g 'PROJECT_BRIEF.md' -g 'docs/*.md' -g 'Makefile' -g 'go.mod' -g '*_test.go' | head -120"
2✓ ✓
/bin/zsh -lc "cat go.mod && \
cat request/request.go && \
rg -n '\\.ID|\\bID\\b|Normalize|Validate' --glob '*.go'"
✓ ✓
/bin/zsh -lc "cat docs/identity-model.md && \
cat go.mod && \
rg --files -g '*_test.go' | xargs -r -n1 sh -c 'echo --- \""'$0"; cat "$0"'"'"
3✓ ✓
/bin/zsh -lc 'find . -maxdepth 2 -name AGENTS.md -o -name PROJECT_BRIEF.md; cat request/request_test.go; cat gateway/handler.go; cat notifications/notifier.go; cat queue/queue.go; cat storage/requests.go; cat scheduler/jobs.go; cat correlation/identities.go; cat reporting/report.go'
semedit/semantic_lookup (✓ ✓)
{
  "language": "go",
  "symbol": "Request"
}
4file_change (✓ ✓)semedit/semantic_lookup (✓ ✓)
{
  "language": "go",
  "symbol": "Normalize"
}
5file_change (✓ ✓)semedit/semantic_lookup (✓ ✓)
{
  "language": "go",
  "symbol": "(*Request).Validate"
}
6✓ ✓
/bin/zsh -lc "python3 - <<'PY'
from pathlib import Path
files = ['gateway/handler.go','notifications/notifier.go','queue/queue.go','storage/requests.go','scheduler/jobs.go','correlation/identities.go','reporting/report.go']
for name in files:
    p=Path(name)
    s=p.read_text()
    if name == 'gateway/handler.go': s=s.replace('r.ID, err)', 'r.RequestID, err)')
    elif name == 'notifications/notifier.go': s=s.replace('r.ID', 'r.RequestID').replace('r.Request.RequestID', 'r.Request.RequestID')
    elif name == 'queue/queue.go': s=s.replace('r.ID', 'r.RequestID')
    elif name == 'storage/requests.go': s=s.replace('record.ID == r.ID', 'record.ID == r.RequestID')
    elif name == 'scheduler/jobs.go': s=s.replace('left.Request.ID', 'left.Request.RequestID').replace('right.Request.ID', 'right.Request.RequestID').replace('job.Request.ID', 'job.Request.RequestID').replace('r.ID', 'r.RequestID')
    elif name == 'correlation/identities.go': s=s.replace('r.ID, resp.ID', 'r.RequestID, resp.ID')
    elif name == 'reporting/report.go': s=s.replace('r.Request.ID', 'r.Request.RequestID')
    p.write_text(s)
PY
rg -n '\\.ID|RequestID|ErrInvalidRequest' --glob '*.go'"
semedit/semantic_lookup (✓ ✓)
{
  "language": "go",
  "symbol": "FindByID"
}
7✓ ✓
/bin/zsh -lc "cat notifications/notifier.go; cat storage/requests_test.go; rg -n 'request\\.Request\\{|Request\\{' --glob '*.go'"
semedit/semantic_inspect_symbol (✓ ✓)
{
  "file": "request/request.go",
  "language": "go",
  "symbol": "Request"
}
8? ✗
/bin/zsh -lc "python3 - <<'PY'
from pathlib import Path
p=Path('notifications/notifier.go'); p.write_text(p.read_text().replace('r.Request.ID', 'r.Request.RequestID'))
for name in ['gateway/handler_test.go','request/request_test.go','storage/requests_test.go']:
 p=Path(name); s=p.read_text()
 s=s.replace('request.Request{\"req-1\", \"audit\", nil}', 'request.Request{RequestID: \"req-1\", Kind: \"audit\"}')
 s=s.replace('Request{\"req-7\", \"audit\", nil}', 'Request{RequestID: \"req-7\", Kind: \"audit\"}')
 s=s.replace('Request{{\"other\", \"audit\", nil}, want}', 'Request{{RequestID: \"other\", Kind: \"audit\"}, want}')
 s=s.replace('request.Request{\"req-2\", \"\", nil}', 'request.Request{RequestID: \"req-2\"}')
 p.write_text(s)
PY
gofmt -w request/request.go gateway/handler.go notifications/notifier.go queue/queue.go storage/requests.go scheduler/jobs.go correlation/identities.go reporting/report.go request/request_test.go gateway/handler_test.go storage/requests_test.go
make check"
semedit/semantic_inspect_symbol (✓ ✓)
{
  "file": "request/request.go",
  "language": "go",
  "symbol": "Request.Validate"
}
9file_change (✓ ✓)semedit/semantic_inspect_symbol (✓ ✓)
{
  "file": "request/request.go",
  "language": "go",
  "symbol": "Normalize"
}
10✓ ✓
/bin/zsh -lc 'gofmt -w request/request_test.go && \
go build ./... && \
go test ./... && \
git diff --check && \
git status --short && \
git diff -- go.mod go.sum'
semedit/semantic_inspect_symbol (✓ ✓)
{
  "file": "request/request.go",
  "language": "go",
  "symbol": "FindByID"
}
11✓ ✓
/bin/zsh -lc "git diff -- request/request.go request/request_test.go gateway/handler.go gateway/handler_test.go notifications/notifier.go queue/queue.go storage/requests.go storage/requests_test.go scheduler/jobs.go correlation/identities.go reporting/report.go; rg -n '\\bID\\b' --glob '*.go'"
semedit/semantic_rename (✓ ✓)
{
  "file": "request/request.go",
  "language": "go",
  "symbol": "Request.ID",
  "to": "RequestID"
}
12—semedit/semantic_batch (✓ ✓)
{
  "auto_organize_imports": true,
  "edits": [
    {
      "params": {
        "file": "request/request.go",
        "group": "append",
        "source": "var ErrInvalidRequest = errors.New(\"invalid request\")"
      },
      "tool": "semantic_insert_decl"
    },
    {
      "params": {
        "auto_organize_imports": true,
        "body": "if r.RequestID == \"\" {\n\t\treturn fmt.Errorf(\"%w: request ID is empty\", ErrInvalidRequest)\n\t}\n\treturn nil",
        "file": "request/request.go",
        "symbol": "Request.Validate"
      },
      "tool": "semantic_replace_body"
    },
    {
      "params": {
        "body": "return normalizeKind(kind)",
        "file": "request/request.go",
        "symbol": "Normalize"
      },
      "tool": "semantic_replace_body"
    },
    {
      "params": {
        "access_modifier": "private",
        "file": "request/request.go",
        "source": "func normalizeKind(kind string) string {\n\tkind = strings.TrimSpace(kind)\n\tkind = strings.ToLower(kind)\n\treturn kind\n}"
      },
      "tool": "semantic_insert_function"
    }
  ]
}
13—semedit/semantic_lookup (✓ ✗): resolve Request.ID: symbol not found
{
  "language": "go",
  "symbol": "Request.ID"
}
14—semedit/semantic_lookup (✓ ✓)
{
  "file": "request/request.go",
  "language": "go",
  "symbol": "ErrInvalidRequest"
}
15—semedit/semantic_find_references (✓ ✓)
{
  "file": "request/request.go",
  "language": "go",
  "symbol": "Request.RequestID"
}
Baseline vs Semedit Agentic in Large Context
  • Vanilla (Baseline vs Semedit Agentic in Large Context) Edit: File request/request.go modified (34 lines -> 40 lines)
  • Semedit MCP (Baseline vs Semedit Agentic in Large Context) Edit: File request/request.go modified (34 lines -> 40 lines)
#VanillaSemedit MCP
1✓ ✓
/bin/zsh -lc "pwd && \
rg --files -g 'AGENTS.md' -g 'PROJECT_BRIEF.md' -g 'go.mod' -g '*request*' | head -80 && \
git status --short"
✓ ✓
/bin/zsh -lc "pwd && \
rg --files -g 'PROJECT_BRIEF.md' -g 'docs/*.md' -g 'Makefile' -g 'go.mod' -g '*_test.go' | head -100"
2✓ ✓
/bin/zsh -lc "cat request/request.go && \
rg -n '\\.ID|\\bID\\b|Normalize|Validate' --glob '*.go' ."
? ✗
/bin/zsh -lc 'cat docs/identity-model.md && \
cat go.mod && \
cat Makefile'
3✓ ✓
/bin/zsh -lc "rg --files -g '*.go' | sort | xargs -I{} sh -c 'printf \"\\n--- %s ---\\n\" \""'$1"; cat "$1"'"' sh {}"
semedit/semantic_lookup (✓ ✓)
{
  "language": "go",
  "symbol": "Request"
}
4✓ ✓
/bin/zsh -lc "python3 - <<'PY'
from pathlib import Path
files = {
'request/request.go': [('ID      string','RequestID string'), ('r.ID','r.RequestID')],
'gateway/handler.go': [('r.ID','r.RequestID')],
'notifications/notifier.go': [('r.ID','r.RequestID'), ('r.Request.ID','r.Request.RequestID')],
'queue/queue.go': [('r.ID','r.RequestID')],
'reporting/report.go': [('r.Request.ID','r.Request.RequestID')],
'scheduler/jobs.go': [('left.Request.ID','left.Request.RequestID'), ('right.Request.ID','right.Request.RequestID'), ('job.Request.ID','job.Request.RequestID'), ('r.ID','r.RequestID')],
'storage/requests.go': [('r.ID','r.RequestID')],
'correlation/identities.go': [('r.ID','r.RequestID')],
}
for name, changes in files.items():
    p=Path(name)
    s=p.read_text()
    for old,new in changes:
        s=s.replace(old,new)
    p.write_text(s)

p=Path('request/request.go')
s=p.read_text().replace('type Request struct {', 'var ErrInvalidRequest = errors.New(\"invalid request\")\\n\\ntype Request struct {')
s=s.replace('return errors.New(\"invalid request\")', 'return ErrInvalidRequest')
s=s.replace('func Normalize(kind string) string {\\n\\tkind = strings.TrimSpace(kind)\\n\\tkind = strings.ToLower(kind)\\n\\treturn kind\\n}', 'func Normalize(kind string) string {\\n\\treturn normalizeKind(kind)\\n}\\n\\nfunc normalizeKind(kind string) string {\\n\\tkind = strings.TrimSpace(kind)\\n\\tkind = strings.ToLower(kind)\\n\\treturn kind\\n}')
p.write_text(s)
PY
rg -n '\\.ID|RequestID|ErrInvalidRequest|normalizeKind' --glob '*.go' .
gofmt -w request/request.go gateway/handler.go notifications/notifier.go queue/queue.go reporting/report.go scheduler/jobs.go storage/requests.go correlation/identities.go"
semedit/semantic_inspect_symbol (✓ ✓)
{
  "file": "request/request.go",
  "symbol": "Request"
}
5✓ ✓
/bin/zsh -lc 'git diff -- request/request.go gateway/handler.go notifications/notifier.go queue/queue.go reporting/report.go scheduler/jobs.go storage/requests.go correlation/identities.go && \
git diff -- go.mod go.sum && \
go build ./... && \
go test ./...'
semedit/semantic_lookup (✓ ✓)
{
  "file": "request/request.go",
  "language": "go",
  "symbol": "Normalize"
}
6✓ ✓
/bin/zsh -lc "git status --short --untracked-files=all && \
git rev-parse --show-toplevel && \
git diff --stat && \
rg -n 'request\\.Request|Request\\{' --glob '*.go' ."
semedit/semantic_lookup (✓ ✓)
{
  "file": "request/request.go",
  "language": "go",
  "symbol": "Validate"
}
7✓ ✓
/bin/zsh -lc "python3 - <<'PY'
from pathlib import Path
p=Path('request/request_test.go')
s=p.read_text().replace('import \"testing\"', 'import (\\n\\t\"errors\"\\n\\t\"testing\"\\n)')
s=s.replace('if err == nil {\\n\\t\\tt.Fatal(\"Validate() accepted an empty request identity\")\\n\\t}', 'if "'!errors.Is(err, ErrInvalidRequest) {'"\\n\\t\\tt.Fatalf(\"Validate() error = %v, want ErrInvalidRequest\", err)\\n\\t}')
p.write_text(s)
PY
gofmt -w request/request_test.go
go build ./... && \
go test ./... && \
git diff -- go.mod go.sum"
semedit/semantic_find_references (✓ ✓)
{
  "file": "request/request.go",
  "language": "go",
  "symbol": "Request"
}
8—✓ ✓
/bin/zsh -lc 'cat request/request_test.go'
9—semedit/semantic_inspect_symbol (✓ ✓)
{
  "file": "request/request.go",
  "symbol": "Request.Validate"
}
10—semedit/semantic_inspect_symbol (✓ ✓)
{
  "file": "request/request.go",
  "symbol": "Normalize"
}
11—semedit/semantic_lookup (✓ ✓)
{
  "file": "request/request.go",
  "language": "go",
  "symbol": "Request.ID"
}
12—semedit/semantic_rename (✓ ✓)
{
  "file": "request/request.go",
  "language": "go",
  "symbol": "Request.ID",
  "to": "RequestID"
}
13—semedit/semantic_batch (✓ ✓)
{
  "edits": [
    {
      "params": {
        "access_modifier": "public",
        "file": "request/request.go",
        "source": "var ErrInvalidRequest = errors.New(\"invalid request\")"
      },
      "tool": "semantic_insert_decl"
    },
    {
      "params": {
        "body": "if r.RequestID == \"\" {\n\t\treturn ErrInvalidRequest\n\t}\n\treturn nil",
        "file": "request/request.go",
        "symbol": "Request.Validate"
      },
      "tool": "semantic_replace_body"
    },
    {
      "params": {
        "body": "return normalizeKind(kind)",
        "file": "request/request.go",
        "symbol": "Normalize"
      },
      "tool": "semantic_replace_body"
    },
    {
      "params": {
        "file": "request/request.go",
        "source": "func normalizeKind(kind string) string {\n\tkind = strings.TrimSpace(kind)\n\tkind = strings.ToLower(kind)\n\treturn kind\n}"
      },
      "tool": "semantic_insert_function"
    }
  ]
}
14—semedit/semantic_lookup (✓ ✓)
{
  "file": "response/response.go",
  "language": "go",
  "symbol": "Response.ID"
}
15—semedit/semantic_lookup (✓ ✓)
{
  "file": "review/review.go",
  "language": "go",
  "symbol": "Review.ID"
}
16—semedit/semantic_lookup (✓ ✓)
{
  "file": "request/request.go",
  "language": "go",
  "symbol": "Request.RequestID"
}
17—✓ ✓
/bin/zsh -lc 'git diff -- go.mod go.sum && \
git status --short'
18—semedit/semantic_inspect_symbol (✓ ✓)
{
  "file": "request/request.go",
  "symbol": "Request"
}

default prompt · prescriptive MCP instructions · readwrite semedit restriction

SettingValue
Test casetask-12-request-identity-migration
Targetcodex/gpt-6-luna/medium
Prompt variantdefault
MCP server instructionsprescriptive
Semedit arm restrictionreadwrite
Fixturetestdata/bench/task_12_request_identity_migration.txtar

Vanilla LLM Prompt:

You are forbidden to modify protected files: “go.mod”, “go.sum”.

Migrate the request identity API in this large multi-package Go service. Rename only Request.ID to Request.RequestID and update every semantic use across packages; Response.ID and Review.ID are separate identities and must remain unchanged, including the many syntactically identical r.ID expressions. Add a package sentinel ErrInvalidRequest and return it from Validate when the request ID is empty, preserving error wrapping and callers. Extract the normalization block from the existing exported request.Normalize function into an unexported normalizeKind helper and keep Normalize exported with the same behavior and signature. Preserve module metadata and existing tests. Verification differs by editing method: when making ordinary file edits, run the project build and tests and ensure both pass; when using semedit, treat clean compiler diagnostic deltas returned by its mutation commands as build-clean evidence and do not run a separate build or test command. Do not use semantic editing MCP tools; use standard file editing. When done, output DONE.

Semedit MCP Prompt:

You are forbidden to modify protected files: “go.mod”, “go.sum”.

Migrate the request identity API in this large multi-package Go service. Rename only Request.ID to Request.RequestID and update every semantic use across packages; Response.ID and Review.ID are separate identities and must remain unchanged, including the many syntactically identical r.ID expressions. Add a package sentinel ErrInvalidRequest and return it from Validate when the request ID is empty, preserving error wrapping and callers. Extract the normalization block from the existing exported request.Normalize function into an unexported normalizeKind helper and keep Normalize exported with the same behavior and signature. Preserve module metadata and existing tests. Verification differs by editing method: when making ordinary file edits, run the project build and tests and ensure both pass; when using semedit, treat clean compiler diagnostic deltas returned by its mutation commands as build-clean evidence and do not run a separate build or test command. Do not inspect Go implementation files (non-test .go) with shell commands such as cat, sed, or rg. Use semantic code inspection tools for those files. Reading project documentation (docs/.md), build manifests (go.mod, Makefile), and visible test files in the task workspace is permitted. Use semedit semantic tools for supported source code modifications. Shell commands for builds and tests are allowed. When done, output DONE.

Initial Workspace State (Before Edit)
package request

import (
	"errors"
	"strings"
)

type Request struct {
	ID      string
	Kind    string
	Payload []byte
}

func (r Request) Validate() error {
	if r.ID == "" {
		return errors.New("invalid request")
	}
	return nil
}

func Normalize(kind string) string {
	kind = strings.TrimSpace(kind)
	kind = strings.ToLower(kind)
	return kind
}

func FindByID(requests []Request, id string) (Request, bool) {
	for _, r := range requests {
		if r.ID == id {
			return r, true
		}
	}
	return Request{}, false
}
MetricVanilla (Small)MCP (Small)Δ (Small)Vanilla (Large)MCP (Large)Δ (Large)
Wall-Clock Latency55.32s124.66s+125.4%63.38s121.42s+91.6%
Process Start → First Event0.13s0.14s—0.15s0.14s—
First Event → First Tool Call5.89s8.53s—5.46s7.70s—
MCP Initialize → First Semantic Call——————
MCP Server Start → Initialize——————
Top-Level User Turns110%110%
Internal Tool Cycles827+237.5%1012+20.0%
Initial Load / Discovery Turns31-66.7%42-50.0%
MCP Discovery / Schema Turns00—00—
Tool Invocations (per run)827+237.5%1012+20.0%
Output Tokens20231483-26.7%21032246+6.8%
Reasoning / Thinking Tokens434243-44.0%4501338+197.3%
Total Input Tokens203684445039+118.5%249615297475+19.2%
Cached Input Tokens169728398336+134.7%228608256768+12.3%
Uncached Input Tokens3395646703+37.5%2100740707+93.8%
Cost0.15800.2379+50.5%0.14160.2108+48.9%
Cached vs Uncached Token Ratio5.00:18.53:1+70.6%10.88:16.31:1-42.0%
Oracle L1: Mutation PolicyPASSPASS—PASSPASS—
Oracle L2: AST InvariantsPASSPASS—PASSPASS—
Oracle L3: Clean BuildPASSPASS—PASSPASS—
Oracle L4: Verification TestPASSPASS—PASSPASS—
Semantic Tool Invocation Verified (per run)N/APASS—N/APASS—
Baseline vs Semedit Agentic in Small Context
  • Vanilla (Baseline vs Semedit Agentic in Small Context) Edit: File request/request.go modified (34 lines -> 41 lines)
  • Semedit MCP (Baseline vs Semedit Agentic in Small Context) Edit: File request/request.go modified (34 lines -> 41 lines)
#VanillaSemedit MCP
1✓ ✓
/bin/zsh -lc "pwd && \
rg --files -g '"'!*vendor*'"' | head -80 && \
rg -n \"type Request struct|func .*Normalize|ErrInvalidRequest|\\.ID\\b\" --glob '*.go'"
✓ ✓
/bin/zsh -lc "pwd && \
rg --files -g 'PROJECT_BRIEF.md' -g 'docs/*.md' -g 'Makefile' -g 'go.mod' -g '*_test.go' | head -80"
2✓ ✓
/bin/zsh -lc 'git status --short && \
cat request/request.go && \
cat gateway/handler.go && \
cat notifications/notifier.go && \
cat queue/queue.go && \
cat storage/requests.go && \
cat scheduler/jobs.go && \
cat correlation/identities.go && \
cat reporting/report.go && \
cat go.mod'
semedit/semantic_assertion_mode (✓ ✗): param "file" is required: invalid operation parameters
{}
3✓ ✓
/bin/zsh -lc "cat docs/identity-model.md && \
cat request/request_test.go && \
rg -n '\\b(request\\.|Request\\b|\\.ID\\b)' --glob '*.go'"
? ✗
/bin/zsh -lc "cat docs/identity-model.md && \
cat go.mod && \
rg --files -g 'Makefile' -g 'PROJECT_BRIEF.md' && \
cat Makefile"
4✓ ✓
/bin/zsh -lc "python3 - <<'PY'
from pathlib import Path
import os, tempfile
replacements = {
'request/request.go': [('ID      string','RequestID string'), ('if r.ID == \"\" {\\n\\t\\treturn errors.New(\"invalid request\")\\n\\t}', 'if r.RequestID == \"\" {\\n\\t\\treturn fmt.Errorf(\"invalid request: %w\", ErrInvalidRequest)\\n\\t}'), ('\"errors\"','\"errors\"\\n\\t\"fmt\"'), ('func (r Request) Validate() error {','var ErrInvalidRequest = errors.New(\"invalid request\")\\n\\nfunc (r Request) Validate() error {'), ('kind = strings.TrimSpace(kind)\\n\\tkind = strings.ToLower(kind)\\n\\treturn kind', 'return normalizeKind(kind)'), ('func Normalize(kind string) string {','func Normalize(kind string) string {\\n\\treturn normalizeKind(kind)\\n}\\n\\nfunc normalizeKind(kind string) string {'), ('r.ID == id','r.RequestID == id')],
'gateway/handler.go': [('r.ID, err','r.RequestID, err')],
'notifications/notifier.go': [('r.ID','r.RequestID'), ('r.Request.ID','r.Request.RequestID')],
'queue/queue.go': [('r.ID','r.RequestID')],
'storage/requests.go': [('r.ID','r.RequestID')],
'scheduler/jobs.go': [('left.Request.ID','left.Request.RequestID'), ('right.Request.ID','right.Request.RequestID'), ('job.Request.ID','job.Request.RequestID'), ('r.ID','r.RequestID')],
'correlation/identities.go': [('r.ID, resp.ID','r.RequestID, resp.ID')],
'reporting/report.go': [('r.Request.ID','r.Request.RequestID')],
}
for name, pairs in replacements.items():
    p=Path(name); s=p.read_text()
    for old,new in pairs:
        if old not in s: raise SystemExit(f'missing pattern in {name}: {old"'!r}'"')
        s=s.replace(old,new)
    fd,tmp=tempfile.mkstemp(dir=p.parent, prefix=p.name+'.', suffix='.tmp')
    with os.fdopen(fd,'w') as f:
        f.write(s); f.flush(); os.fsync(f.fileno())
    os.replace(tmp,p)
PY
gofmt -w request/request.go gateway/handler.go notifications/notifier.go queue/queue.go storage/requests.go scheduler/jobs.go correlation/identities.go reporting/report.go
rg -n '\\b(r|left\\.Request|right\\.Request|job\\.Request)\\.ID\\b|Request\\.ID\\b|type Request struct|ErrInvalidRequest|normalizeKind' --glob '*.go'"
✓ ✓
/bin/zsh -lc "ls -la && \
rg --files -g 'AGENTS.md' -g 'AGENTS.override.md' -g 'Makefile'"
5✓ ✓
/bin/zsh -lc 'cat request/request.go'
semedit/semantic_lookup (✓ ✓)
{
  "symbol": "Request"
}
6✓ ✓
/bin/zsh -lc "python3 - <<'PY'
from pathlib import Path
import os,tempfile
p=Path('request/request.go'); s=p.read_text(); s=s.replace('func normalizeKind(kind string) string {\\n\\treturn normalizeKind(kind)\\n}', 'func normalizeKind(kind string) string {\\n\\tkind = strings.TrimSpace(kind)\\n\\tkind = strings.ToLower(kind)\\n\\treturn kind\\n}')
fd,tmp=tempfile.mkstemp(dir=p.parent,prefix=p.name+'.',suffix='.tmp')
with os.fdopen(fd,'w') as f: f.write(s); f.flush(); os.fsync(f.fileno())
os.replace(tmp,p)
p=Path('request/request_test.go'); s=p.read_text().replace('import \"testing\"','import (\\n\\t\"errors\"\\n\\t\"testing\"\\n)').replace('if err == nil {\\n\\t\\tt.Fatal(\"Validate() accepted an empty request identity\")\\n\\t}', 'if "'!errors.Is(err, ErrInvalidRequest) {'"\\n\\t\\tt.Fatalf(\"Validate() error = %v, want ErrInvalidRequest\", err)\\n\\t}')
fd,tmp=tempfile.mkstemp(dir=p.parent,prefix=p.name+'.',suffix='.tmp')
with os.fdopen(fd,'w') as f: f.write(s); f.flush(); os.fsync(f.fileno())
os.replace(tmp,p)
PY
gofmt -w request/request.go request/request_test.go
go test ./..."
semedit/semantic_lookup (✓ ✓)
{
  "symbol": "Validate"
}
7✓ ✓
/bin/zsh -lc 'go build ./... && \
git diff -- request/request.go request/request_test.go gateway/handler.go notifications/notifier.go queue/queue.go storage/requests.go scheduler/jobs.go correlation/identities.go reporting/report.go && \
git status --short'
✓ ✓
/bin/zsh -lc 'cat request/request_test.go && \
cat gateway/handler_test.go && \
cat storage/requests_test.go && \
cat response/response_test.go && \
cat review/review_test.go'
8✓ ✓
/bin/zsh -lc 'git rev-parse --show-toplevel && \
git status --short --untracked-files=all -- . && \
git diff --stat -- . && \
git ls-files request/request.go'
semedit/semantic_lookup (✓ ✓)
{
  "symbol": "Normalize"
}
9—semedit/semantic_inspect_symbol (✓ ✓)
{
  "file": "request/request.go",
  "symbol": "Request"
}
10—semedit/semantic_find_references (✓ ✓)
{
  "file": "request/request.go",
  "symbol": "Request"
}
11—semedit/semantic_inspect_symbol (✓ ✓)
{
  "file": "request/request.go",
  "symbol": "Normalize"
}
12—semedit/semantic_inspect_symbol (✓ ✓)
{
  "file": "request/request.go",
  "symbol": "Request.Validate"
}
13—✓ ✓
/bin/zsh -lc "rg --files -g '*.go'"
14—semedit/semantic_rename (✓ ✓)
{
  "symbol": "Request.ID",
  "to": "RequestID"
}
15—semedit/semantic_find_references (✓ ✓)
{
  "file": "request/request.go",
  "symbol": "Request.RequestID"
}
16—semedit/semantic_lookup (✓ ✓)
{
  "file": "request/request.go",
  "symbol": "FindByID"
}
17—semedit/semantic_lookup (✓ ✓)
{
  "file": "request/request.go",
  "symbol": "Request.Validate"
}
18—semedit/semantic_lookup (✓ ✓)
{
  "file": "request/request.go",
  "symbol": "Normalize"
}
19—semedit/semantic_lookup (✓ ✗): resolve ErrInvalidRequest in request/request.go: symbol not found
{
  "file": "request/request.go",
  "symbol": "ErrInvalidRequest"
}
20—semedit/semantic_replace_body (✓ ✓)
{
  "auto_organize_imports": true,
  "body": "if r.RequestID == \"\" {\n\t\treturn fmt.Errorf(\"invalid request: %w\", ErrInvalidRequest)\n\t}\n\treturn nil",
  "file": "request/request.go",
  "symbol": "Request.Validate"
}
21—semedit/semantic_replace_body (✓ ✓)
{
  "body": "return normalizeKind(kind)",
  "file": "request/request.go",
  "symbol": "Normalize"
}
22—semedit/semantic_replace_body (✓ ✓)
{
  "body": "for _, r := range requests {\n\t\tif r.RequestID == id {\n\t\t\treturn r, true\n\t\t}\n\t}\n\treturn Request{}, false",
  "file": "request/request.go",
  "symbol": "FindByID"
}
23—semedit/semantic_insert_function (✓ ✓)
{
  "access_modifier": "private",
  "file": "request/request.go",
  "source": "func normalizeKind(kind string) string {\n\tkind = strings.TrimSpace(kind)\n\tkind = strings.ToLower(kind)\n\treturn kind\n}"
}
24—semedit/semantic_insert_decl (✓ ✓)
{
  "access_modifier": "public",
  "file": "request/request.go",
  "source": "var ErrInvalidRequest = errors.New(\"invalid request\")"
}
25—semedit/semantic_inspect_symbol (✓ ✓)
{
  "file": "request/request.go",
  "symbol": "ErrInvalidRequest"
}
26—semedit/semantic_inspect_symbol (✓ ✓)
{
  "file": "request/request.go",
  "symbol": "Normalize"
}
27—semedit/semantic_find_references (✓ ✗): find_references: go: symbol not found: "Request.ID"
{
  "file": "request/request.go",
  "symbol": "Request.ID"
}
Baseline vs Semedit Agentic in Large Context
  • Vanilla (Baseline vs Semedit Agentic in Large Context) Edit: File request/request.go modified (34 lines -> 41 lines)
  • Semedit MCP (Baseline vs Semedit Agentic in Large Context) Edit: File request/request.go modified (34 lines -> 40 lines)
#VanillaSemedit MCP
1✓ ✓
/bin/zsh -lc "pwd && \
rg --files -g 'AGENTS.md' -g '*.go' -g 'go.mod' -g 'go.sum' -g 'README*' | head -100 && \
rg -n 'type Request struct|func .*Validate|func .*Normalize|\\.ID\\b|ErrInvalidRequest' --glob '*.go' ."
✓ ✓
/bin/zsh -lc "pwd && \
rg --files -g 'PROJECT_BRIEF.md' -g 'docs/*.md' -g 'Makefile' -g '*.go' | head -100"
2✓ ✓
/bin/zsh -lc "cat request/request.go && \
cat go.mod && \
rg -n 'Request\\{|\\.Request\\.ID|\\br\\.ID\\b|Request\\.ID|ID:' --glob '*.go' ."
? ✗
/bin/zsh -lc 'cat docs/identity-model.md && \
cat Makefile && \
cat go.mod'
3✓ ✓
/bin/zsh -lc 'cat gateway/handler.go notifications/notifier.go queue/queue.go storage/requests.go scheduler/jobs.go reporting/report.go correlation/identities.go && \
cat request/request_test.go'
semedit/semantic_lookup (✓ ✓)
{
  "language": "go",
  "symbol": "Normalize"
}
4✓ ✓
/bin/zsh -lc 'rg --files'
semedit/semantic_lookup (✓ ✓)
{
  "language": "go",
  "symbol": "Request"
}
5file_change (✓ ✓)semedit/semantic_lookup (✓ ✓)
{
  "language": "go",
  "symbol": "Validate"
}
6file_change (✓ ✓)semedit/semantic_inspect_symbol (✓ ✓)
{
  "language": "go",
  "symbol": "Normalize"
}
7✓ ✓
/bin/zsh -lc "gofmt -w request/request.go gateway/handler.go notifications/notifier.go queue/queue.go storage/requests.go scheduler/jobs.go correlation/identities.go reporting/report.go && \
rg -n '\\.ID\\b|RequestID|ErrInvalidRequest|func normalizeKind' --glob '*.go' . && \
go build ./... && \
go test ./..."
semedit/semantic_inspect_symbol (✓ ✓)
{
  "language": "go",
  "symbol": "Request"
}
8✓ ✓
/bin/zsh -lc 'git status --short && \
git diff --check && \
git diff -- go.mod go.sum && \
git diff --stat && \
git diff -- request/request.go gateway/handler.go notifications/notifier.go queue/queue.go storage/requests.go scheduler/jobs.go correlation/identities.go reporting/report.go'
semedit/semantic_inspect_symbol (✓ ✓)
{
  "language": "go",
  "symbol": "Request.Validate"
}
9file_change (✓ ✓)semedit/semantic_rename (✓ ✓)
{
  "auto_organize_imports": false,
  "language": "go",
  "symbol": "Request.ID",
  "to": "RequestID"
}
10✓ ✓
/bin/zsh -lc 'gofmt -w request/request_test.go && \
go build ./... && \
go test ./... && \
git diff --check -- request/request.go request/request_test.go gateway/handler.go notifications/notifier.go queue/queue.go storage/requests.go scheduler/jobs.go correlation/identities.go reporting/report.go'
semedit/semantic_batch (✓ ✓)
{
  "edits": [
    {
      "params": {
        "access_modifier": "public",
        "file": "request/request.go",
        "source": "var ErrInvalidRequest = errors.New(\"invalid request\")"
      },
      "tool": "semantic_insert_decl"
    },
    {
      "params": {
        "body": "if r.RequestID == \"\" {\n\t\treturn ErrInvalidRequest\n\t}\n\treturn nil",
        "file": "request/request.go",
        "symbol": "Request.Validate"
      },
      "tool": "semantic_replace_body"
    },
    {
      "params": {
        "body": "return normalizeKind(kind)",
        "file": "request/request.go",
        "symbol": "Normalize"
      },
      "tool": "semantic_replace_body"
    },
    {
      "params": {
        "access_modifier": "private",
        "file": "request/request.go",
        "source": "func normalizeKind(kind string) string {\n\tkind = strings.TrimSpace(kind)\n\tkind = strings.ToLower(kind)\n\treturn kind\n}"
      },
      "tool": "semantic_insert_function"
    }
  ]
}
11—✓ ✓
/bin/zsh -lc 'git status --short && \
git diff -- go.mod go.sum && \
git diff --stat && \
git diff --'
12—semedit/semantic_find_references (✓ ✓)
{
  "file": "request/request.go",
  "language": "go",
  "symbol": "Request.RequestID"
}

default prompt · prescriptive MCP instructions · readwrite semedit restriction

SettingValue
Test casetask-12-request-identity-migration
Targetcodex/gpt-6-luna/medium
Prompt variantdefault
MCP server instructionsprescriptive
Semedit arm restrictionreadwrite
Fixturetestdata/bench/task_12_request_identity_migration.txtar

Vanilla LLM Prompt:

You are forbidden to modify protected files: “go.mod”, “go.sum”.

Migrate the request identity API in this large multi-package Go service. Rename only Request.ID to Request.RequestID and update every semantic use across packages; Response.ID and Review.ID are separate identities and must remain unchanged, including the many syntactically identical r.ID expressions. Add a package sentinel ErrInvalidRequest and return it from Validate when the request ID is empty, preserving error wrapping and callers. Extract the normalization block from the existing exported request.Normalize function into an unexported normalizeKind helper and keep Normalize exported with the same behavior and signature. Preserve module metadata and existing tests. Verification differs by editing method: when making ordinary file edits, run the project build and tests and ensure both pass; when using semedit, treat clean compiler diagnostic deltas returned by its mutation commands as build-clean evidence and do not run a separate build or test command. Do not use semantic editing MCP tools; use standard file editing. When done, output DONE.

Semedit MCP Prompt:

You are forbidden to modify protected files: “go.mod”, “go.sum”.

Migrate the request identity API in this large multi-package Go service. Rename only Request.ID to Request.RequestID and update every semantic use across packages; Response.ID and Review.ID are separate identities and must remain unchanged, including the many syntactically identical r.ID expressions. Add a package sentinel ErrInvalidRequest and return it from Validate when the request ID is empty, preserving error wrapping and callers. Extract the normalization block from the existing exported request.Normalize function into an unexported normalizeKind helper and keep Normalize exported with the same behavior and signature. Preserve module metadata and existing tests. Verification differs by editing method: when making ordinary file edits, run the project build and tests and ensure both pass; when using semedit, treat clean compiler diagnostic deltas returned by its mutation commands as build-clean evidence and do not run a separate build or test command. Do not inspect Go implementation files (non-test .go) with shell commands such as cat, sed, or rg. Use semantic code inspection tools for those files. Reading project documentation (docs/.md), build manifests (go.mod, Makefile), and visible test files in the task workspace is permitted. Use semedit semantic tools for supported source code modifications. Shell commands for builds and tests are allowed. When done, output DONE.

Initial Workspace State (Before Edit)
package request

import (
	"errors"
	"strings"
)

type Request struct {
	ID      string
	Kind    string
	Payload []byte
}

func (r Request) Validate() error {
	if r.ID == "" {
		return errors.New("invalid request")
	}
	return nil
}

func Normalize(kind string) string {
	kind = strings.TrimSpace(kind)
	kind = strings.ToLower(kind)
	return kind
}

func FindByID(requests []Request, id string) (Request, bool) {
	for _, r := range requests {
		if r.ID == id {
			return r, true
		}
	}
	return Request{}, false
}
MetricVanilla (Small)MCP (Small)Δ (Small)Vanilla (Large)MCP (Large)Δ (Large)
Wall-Clock Latency58.65s90.86s+54.9%47.78s151.40s+216.9%
Process Start → First Event0.14s0.15s—0.13s0.17s—
First Event → First Tool Call5.71s10.75s—4.57s10.02s—
MCP Initialize → First Semantic Call——————
MCP Server Start → Initialize——————
Top-Level User Turns110%110%
Internal Tool Cycles1013+30.0%824+200.0%
Initial Load / Discovery Turns42-50.0%42-50.0%
MCP Discovery / Schema Turns00—00—
Tool Invocations (per run)1013+30.0%824+200.0%
Output Tokens20931953-6.7%16702288+37.0%
Reasoning / Thinking Tokens4351051+141.6%4041141+182.4%
Total Input Tokens243889381750+56.5%198121558846+182.1%
Cached Input Tokens223488331008+48.1%179968506880+181.7%
Uncached Input Tokens2040150742+148.7%1815351966+186.3%
Cost0.13850.2472+78.5%0.11630.2995+157.5%
Cached vs Uncached Token Ratio10.95:16.52:1-40.5%9.91:19.75:1-1.6%
Oracle L1: Mutation PolicyPASSPASS—PASSPASS—
Oracle L2: AST InvariantsPASSPASS—PASSPASS—
Oracle L3: Clean BuildPASSPASS—PASSPASS—
Oracle L4: Verification TestPASSPASS—PASSPASS—
Semantic Tool Invocation Verified (per run)N/APASS—N/APASS—
Baseline vs Semedit Agentic in Small Context
  • Vanilla (Baseline vs Semedit Agentic in Small Context) Edit: File request/request.go modified (34 lines -> 41 lines)
  • Semedit MCP (Baseline vs Semedit Agentic in Small Context) Edit: File request/request.go modified (34 lines -> 40 lines)
#VanillaSemedit MCP
1✓ ✓
/bin/zsh -lc "pwd && \
rg --files -g 'AGENTS*' -g 'PROJECT_BRIEF.md' -g 'go.mod' -g 'go.sum' -g '*.go' | head -120 && \
rg -n '\\btype Request\\b|func \\(.*Request.*\\) Validate|func Normalize|Request\\.ID|\\.ID\\b' --glob '*.go' | head -240"
✓ ✓
/bin/zsh -lc "pwd && \
rg --files -g 'PROJECT_BRIEF.md' -g 'Makefile' -g 'docs/*.md' | head -60"
2✓ ✓
/bin/zsh -lc "cat request/request.go && \
cat go.mod && \
rg -n '\\bRequest\\s*\\{|\\.Request\\.ID|\\.Request\\.RequestID|RequestID|Normalize\\(' --glob '*.go'"
? ✗
/bin/zsh -lc 'cat docs/identity-model.md && \
cat Makefile && \
cat go.mod'
3? ✗
/bin/zsh -lc 'cat request/request_test.go && \
for f in gateway/handler.go notifications/notifier.go queue/queue.go review/review.go storage/requests.go scheduler/jobs.go correlation/identities.go reporting/report.go; do echo ===$f; cat "$f"; done'
semedit/semantic_lookup (✓ ✓)
{
  "symbol": "Request"
}
4✓ ✓
/bin/zsh -lc 'cat gateway/handler.go notifications/notifier.go queue/queue.go review/review.go storage/requests.go scheduler/jobs.go correlation/identities.go reporting/report.go'
semedit/semantic_inspect_symbol (✓ ✓)
{
  "file": "request/request.go",
  "symbol": "Validate"
}
5file_change (✓ ✓)semedit/semantic_inspect_symbol (✓ ✓)
{
  "file": "request/request.go",
  "symbol": "Normalize"
}
6file_change (✓ ✓)semedit/semantic_inspect_symbol (✓ ✓)
{
  "file": "request/request.go",
  "symbol": "Request"
}
7? ✗
/bin/zsh -lc "rg -n '\\b(r|request|left\\.Request|right\\.Request|job\\.Request)\\.ID\\b|Request\\{\" --glob '*.go'; rg --files -g 'Makefile' -g 'go.sum' -g '*.go'"
✓ ✓
/bin/zsh -lc "rg --files -g '*_test.go' | head -50"
8✓ ✓
/bin/zsh -lc "rg -n '\\.ID\\b|Request\\{' --glob '*.go'; rg --files -g Makefile -g go.sum -g '*.go'"
semedit/semantic_lookup (✓ ✓)
{
  "file": "request/request.go",
  "symbol": "Request.ID"
}
9✓ ✓
/bin/zsh -lc 'gofmt -w request/request.go gateway/handler.go notifications/notifier.go queue/queue.go storage/requests.go scheduler/jobs.go correlation/identities.go reporting/report.go && \
go build ./... && \
go test ./... && \
git status --short'
semedit/semantic_find_references (✓ ✓)
{
  "file": "request/request.go",
  "symbol": "Request.ID"
}
10✓ ✓
/bin/zsh -lc 'git diff -- request/request.go gateway/handler.go notifications/notifier.go queue/queue.go storage/requests.go scheduler/jobs.go correlation/identities.go reporting/report.go; git check-ignore -v request/request.go; git status --short -- go.mod go.sum'
semedit/semantic_batch (✓ ✓)
{
  "edits": [
    {
      "params": {
        "file": "request/request.go",
        "symbol": "Request.ID",
        "to": "RequestID"
      },
      "tool": "semantic_rename"
    },
    {
      "params": {
        "body": "return normalizeKind(kind)",
        "file": "request/request.go",
        "symbol": "Normalize"
      },
      "tool": "semantic_replace_body"
    },
    {
      "params": {
        "file": "request/request.go",
        "placement": "private_start",
        "source": "func normalizeKind(kind string) string {\n\tkind = strings.TrimSpace(kind)\n\tkind = strings.ToLower(kind)\n\treturn kind\n}"
      },
      "tool": "semantic_insert_function"
    },
    {
      "params": {
        "file": "request/request.go",
        "source": "var ErrInvalidRequest = errors.New(\"invalid request\")"
      },
      "tool": "semantic_insert_decl"
    },
    {
      "params": {
        "body": "if r.RequestID == \"\" {\n\t\treturn ErrInvalidRequest\n\t}\n\treturn nil",
        "file": "request/request.go",
        "symbol": "Request.Validate"
      },
      "tool": "semantic_replace_body"
    }
  ]
}
11—semedit/semantic_find_references (✓ ✓)
{
  "file": "request/request.go",
  "symbol": "Request.RequestID"
}
12—semedit/semantic_inspect_symbol (✓ ✓)
{
  "file": "request/request.go",
  "symbol": "ErrInvalidRequest"
}
13—✓ ✓
/bin/zsh -lc 'git status --short && \
git diff --exit-code -- go.mod go.sum'
Baseline vs Semedit Agentic in Large Context
  • Vanilla (Baseline vs Semedit Agentic in Large Context) Edit: File request/request.go modified (34 lines -> 40 lines)
  • Semedit MCP (Baseline vs Semedit Agentic in Large Context) Edit: File request/request.go modified (34 lines -> 41 lines)
#VanillaSemedit MCP
1✓ ✓
/bin/zsh -lc "pwd && \
rg --files -g 'AGENTS.md' -g 'PROJECT_BRIEF.md' -g 'go.mod' -g '*.go' | head -200 && \
git status --short"
✓ ✓
/bin/zsh -lc "rg --files -g 'PROJECT_BRIEF.md' -g 'Makefile' -g 'go.mod' -g 'docs/*.md' -g 'AGENTS.md' -g 'AGENTS.override.md' | head -80"
2✓ ✓
/bin/zsh -lc "cat go.mod && \
cat request/request.go && \
rg -n '\\bID\\b|Normalize|Validate|Request\\{' --glob '*.go'"
✓ ✓
/bin/zsh -lc "cat docs/identity-model.md && \
cat go.mod && \
rg --files -g '*_test.go' | head -50"
3? ✗
/bin/zsh -lc 'for f in gateway/handler.go notifications/notifier.go correlation/identities.go scheduler/jobs.go storage/requests.go queue/queue.go reporting/report.go; do echo ===$f; cat "$f"; done'
semedit/semantic_lookup (✓ ✓)
{
  "language": "go",
  "symbol": "Normalize"
}
4✓ ✓
/bin/zsh -lc "for f in gateway/handler.go notifications/notifier.go correlation/identities.go scheduler/jobs.go storage/requests.go queue/queue.go reporting/report.go; do printf '%s\\n' \""'$f"; cat "$f"; done'
semedit/semantic_lookup (✓ ✓)
{
  "language": "go",
  "symbol": "Request"
}
5✓ ✓
/bin/zsh -lc "python3 - <<'PY'
from pathlib import Path
import os, tempfile
updates = {
'request/request.go': [('ID      string','RequestID string'), ('errors.New(\"invalid request\")','ErrInvalidRequest'), ('r.ID','r.RequestID'), ('func Normalize(kind string) string {\\n\\tkind = strings.TrimSpace(kind)\\n\\tkind = strings.ToLower(kind)\\n\\treturn kind\\n}', 'func Normalize(kind string) string {\\n\\treturn normalizeKind(kind)\\n}\\n\\nfunc normalizeKind(kind string) string {\\n\\tkind = strings.TrimSpace(kind)\\n\\tkind = strings.ToLower(kind)\\n\\treturn kind\\n}')],
'gateway/handler.go': [('r.ID','r.RequestID')],
'notifications/notifier.go': [('r.ID','r.RequestID'), ('r.Request.ID','r.Request.RequestID')],
'correlation/identities.go': [('r.ID','r.RequestID')],
'scheduler/jobs.go': [('left.Request.ID','left.Request.RequestID'), ('right.Request.ID','right.Request.RequestID'), ('job.Request.ID','job.Request.RequestID'), ('r.ID','r.RequestID')],
'storage/requests.go': [('r.ID','r.RequestID')],
'queue/queue.go': [('r.ID','r.RequestID')],
'reporting/report.go': [('r.Request.ID','r.Request.RequestID')],
}
for name, pairs in updates.items():
    p=Path(name); data=p.read_text()
    for old,new in pairs:
        if old not in data: raise SystemExit(f'missing {old"'!r} in {name}'"')
        data=data.replace(old,new)
    if name == 'request/request.go':
        data=data.replace('type Request struct {', 'var ErrInvalidRequest = errors.New(\"invalid request\")\\n\\ntype Request struct {')
    fd,tmp=tempfile.mkstemp(dir=p.parent, prefix=p.name+'.')
    try:
        with os.fdopen(fd,'w') as f:
            f.write(data); f.flush(); os.fsync(f.fileno())
        os.replace(tmp,p)
    finally:
        if os.path.exists(tmp): os.unlink(tmp)
PY
"
semedit/semantic_lookup (✓ ✓)
{
  "language": "go",
  "symbol": "Validate"
}
6✓ ✓
/bin/zsh -lc "git diff -- request/request.go gateway/handler.go notifications/notifier.go correlation/identities.go scheduler/jobs.go storage/requests.go queue/queue.go reporting/report.go && \
rg -n '\\.ID|\\bID\\s+string|RequestID|ErrInvalidRequest|normalizeKind' --glob '*.go'"
semedit/semantic_inspect_symbol (✓ ✓)
{
  "file": "request/request.go",
  "language": "go",
  "symbol": "Request"
}
7✓ ✓
/bin/zsh -lc 'git status --short -- request/request.go && \
git diff --no-index /dev/null request/request.go | head -60 && \
go build ./... && \
go test ./...'
semedit/semantic_inspect_symbol (✓ ✓)
{
  "file": "request/request.go",
  "language": "go",
  "symbol": "Request.Validate"
}
8✓ ✓
/bin/zsh -lc 'gofmt -w request/request.go gateway/handler.go notifications/notifier.go correlation/identities.go scheduler/jobs.go storage/requests.go queue/queue.go reporting/report.go && \
go build ./... && \
go test ./...'
semedit/semantic_inspect_symbol (✓ ✓)
{
  "file": "request/request.go",
  "language": "go",
  "symbol": "Normalize"
}
9—semedit/semantic_lookup (✓ ✓)
{
  "file": "request/request.go",
  "language": "go",
  "symbol": "Request.ID"
}
10—semedit/semantic_find_references (✓ ✓)
{
  "file": "request/request.go",
  "language": "go",
  "symbol": "Request.ID"
}
11—semedit/semantic_rename (✓ ✓)
{
  "language": "go",
  "symbol": "Request.ID",
  "to": "RequestID"
}
12—✓ ✓
/bin/zsh -lc 'cat request/request_test.go'
13—semedit/semantic_insert_decl (✓ ✓)
{
  "access_modifier": "public",
  "file": "request/request.go",
  "source": "var ErrInvalidRequest = errors.New(\"invalid request\")"
}
14—semedit/semantic_replace_body (✓ ✓)
{
  "auto_organize_imports": true,
  "body": "if r.RequestID == \"\" {\n\t\treturn fmt.Errorf(\"invalid request: %w\", ErrInvalidRequest)\n\t}\n\treturn nil",
  "file": "request/request.go",
  "symbol": "Request.Validate"
}
15—semedit/semantic_replace_body (✓ ✓)
{
  "body": "return normalizeKind(kind)",
  "file": "request/request.go",
  "symbol": "Normalize"
}
16—semedit/semantic_insert_function (✓ ✓)
{
  "access_modifier": "private",
  "file": "request/request.go",
  "source": "func normalizeKind(kind string) string {\n\tkind = strings.TrimSpace(kind)\n\tkind = strings.ToLower(kind)\n\treturn kind\n}"
}
17—semedit/semantic_find_references (✓ ✓)
{
  "file": "request/request.go",
  "language": "go",
  "symbol": "Request.RequestID"
}
18—semedit/semantic_inspect_symbol (✓ ✓)
{
  "file": "request/request.go",
  "language": "go",
  "symbol": "Request"
}
19—semedit/semantic_lookup (✓ ✗): resolve Request.ID in request/request.go: symbol not found
{
  "file": "request/request.go",
  "language": "go",
  "symbol": "Request.ID"
}
20—✓ ✓
/bin/zsh -lc 'git status --short && \
git diff -- go.mod go.sum'
21—semedit/semantic_inspect_symbol (✓ ✓)
{
  "file": "request/request.go",
  "language": "go",
  "symbol": "Request.Validate"
}
22—semedit/semantic_inspect_symbol (✓ ✓)
{
  "file": "request/request.go",
  "language": "go",
  "symbol": "Normalize"
}
23—semedit/semantic_inspect_symbol (✓ ✓)
{
  "file": "request/request.go",
  "language": "go",
  "symbol": "normalizeKind"
}
24—semedit/semantic_inspect_symbol (✓ ✓)
{
  "file": "request/request.go",
  "language": "go",
  "symbol": "ErrInvalidRequest"
}