GPT-6.1 Sol (effort default (no reasoning-effort override) · thinking on) on Bisect a 42-commit local git history to the first bad commit, then fix forward with a regression test
OGPT-6.1 Soldefault · thinking on · Codex CLI 0.163.0 (codex exec --json) · cloud · 2026-10-22 · by @bobsiopener
- Estimated cost
- $0.06
- Wall time
- 53s
- Human step-ins
- 0
- Outcome
- Pass
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Summary
Exact prompt
# Task: find and fix a regression in git history `repo/` is a git repository (branch `main`). Since some point in its history, `parse_duration("1h30m")` returns 3600 instead of 5400 - multi-part durations only count their first part. Nobody noticed because the tests only cover single units. 1. Find the **first** commit that introduced this regression. Write its full 40-character SHA to `FIRST_BAD.txt` (in this folder, next to `repo/`, not inside it), optionally followed by a one-line explanation. 2. Fix the bug with **new commit(s) on top of `main`** - do not rewrite, rebase, amend or reset existing history. Apart from the regression itself, `parse_duration` must behave exactly as at the current tip of `main` (accepted formats, rejected inputs, exact error messages, and the `timeutil.legacy` import path). The fix commit message must contain `Fixes <sha>` with at least the first 7 characters of the first bad commit. 3. Add a regression test to `repo/tests/` (plain `test_*` functions, runnable without pytest) that fails on the buggy code and passes after your fix. Keep the existing test. The grader runs every `test_*` function in `repo/tests/*.py`. When done, `main` must be checked out (finish any `git bisect` with `git bisect reset`) and the working tree clean (everything committed; untracked `__pycache__`/`*.pyc` files are ignored by the grader). Git is configured locally in the repo. No network.
Requires identifying the exact introducing commit (a 'perf' refactor, not the later commit that also touched the file), fixing without rewriting history, keeping later intentional changes (day unit, new error message, legacy import) and writing a test that provably fails on the bad commit. Original benchmark task written for usecaserank.com. Headless, offline run on a reproducible fixture. Cost shown is a list-price API-equivalent estimate (run on a ChatGPT subscription, not billed).
Success criteria: 1. first_bad_correct: FIRST_BAD.txt contains the full SHA of the commit that introduced the regression. 2. history_preserved: the original tip is an ancestor of main and main is checked out. 3. fix_committed_with_reference: at least one new commit, and a new commit message contains 'Fixes <first 7+ chars of the bad SHA>'. 4. working_tree_clean: git status --porcelain shows nothing except untracked __pycache__/*.pyc files. 5. behaviour_correct: hidden checks at HEAD pass (multi-part and day-unit durations, legacy import path, exact 'empty duration string' error, invalid inputs rejected). 6. regression_test_catches_bug: the repo's tests/ (>= 1 test function) all pass at HEAD, and at least one fails when run against the first bad commit's code.
Setup notes: Use Case Scout batch6 case f02-git-bisect-regression (offline fixture). Prepared with batch6/prepare.sh on the shared box; only TASK.md + starting files were copied to the agent machine, hidden key/tests stayed on the box. Prompt = TASK.md verbatim on stdin. Flags: --json -s workspace-write --skip-git-repo-check --ephemeral --ignore-user-config --ignore-rules -C <workdir>. Scored on the box with the scout's scorer: `python score.py WORKDIR KEYDIR`. Single run, no retries. User-level AGENTS.md (846 bytes, sha256 83ec4fe50da8) may have been in context; --ignore-user-config does not document excluding it. Serving model not confirmed: requested via -m; the event log does not echo the serving model id. Price source is secondary (pricing.json verification='secondary', https://www.actuia.com/en/news/ai-api-pricing-in-october-2026-050-to-50-for-output/), not an official OpenAI price page. Score: 6/6 checks. Cost is an ESTIMATE: measured tokens x pricing.json list price (ChatGPT plan, nothing billed); input_tokens include cached reads; output_tokens include reasoning tokens. Tool calls 6 (1 failed, recovered). Single run.
Estimated cost List-price estimate; not actually billed.
Metrics
- Estimated cost
- $0.06
- Wall time
- 53s
- Human step-ins
- 0
- Turns
- 1
| Model | Input tok | Output tok | Cost |
|---|---|---|---|
| OGPT-6.1 Solopenai/gpt-6.1-soleffort default (no reasoning-effort override) · thinking on | 131,212 | 1,810 | $0.06 |
Reproduce this run
- Use the use case prompt on the use case page.
- Same setup: GPT-6.1 Sol (openai/gpt-6.1-sol, effort default (no reasoning-effort override) · thinking on) via
Codex CLI 0.163.0 (codex exec --json), cloud. - It counts as a success only if it meets every success criterion: 1. first_bad_correct: FIRST_BAD.txt contains the full SHA of the commit that introduced the regression. 2. history_preserved: the original tip is an ancestor of main and main is checked out. 3. fix_committed_with_reference: at least one new commit, and a new commit message contains 'Fixes <first 7+ chars of the bad SHA>'. 4. working_tree_clean: git status --porcelain shows nothing except untracked __pycache__/*.pyc files. 5. behaviour_correct: hidden checks at HEAD pass (multi-part and day-unit durations, legacy import path, exact 'empty duration string' error, invalid inputs rejected). 6. regression_test_catches_bug: the repo's tests/ (>= 1 test function) all pass at HEAD, and at least one fails when run against the first bad commit's code.
- Log model, tokens, wall time, human step-ins and the evidence log, then submit it as a reproduction. A different model? Submit a head-to-head rerun.
How runs are scored: Methodology.
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Automated checks
Trust 80% comes from these checks (how Trust % works).
- Run date is not in the future : passed
- Model is in the dated pricing table : passed
- Cost recomputed from tokens matches : passed
- Cached tokens are consistent : passed
- Output throughput is plausible : passed
- Autonomy matches step-ins : passed
- Step-ins do not exceed turns : passed
- Retries agree with first-try result : passed
- Evidence log SHA-256 matches : passed
- Evidence log is substantial : passed
Evidence log
{"type": "thread.started", "thread_id": "01a16438-b9c1-7402-884b-8da6be51824b"}
{"type": "turn.started"}
{"type": "item.completed", "item": {"id": "item_0", "type": "agent_message", "text": "I\u2019ll inspect the history to find the first bad commit, then fix it while preserving the current parser\u2019s other behavior and add a regression test."}}
{"type": "item.started", "item": {"id": "item_1", "type": "command_execution", "command": "/bin/bash -lc \"pwd; rg --files -g AGENTS.md -g '\"'!repo/.git'\"' -g '\"'!**/__pycache__/**'\"'; git -C repo status --short; git -C repo log --oneline --all --decorate; rg --files repo\"", "aggregated_output": "", "exit_code": null, "status": "in_progress"}}
{"type": "item.completed", "item": {"id": "item_1", "type": "command_execution", "command": "/bin/bash -lc \"pwd; rg --files -g AGENTS.md -g '\"'!repo/.git'\"' -g '\"'!**/__pycache__/**'\"'; git -C repo status --short; git -C repo log --oneline --all --decorate; rg --files repo\"", "aggregated_output": "/home/bob/usecase-runs/batch/out/gpt-6.1-sol/172_f02/work\n9565edf (HEAD -> main) chore: changelog entry 41\na49d117 feat: add fmt40 helper\n0028946 test: tidy test file (39)\n2a8f7d4 feat: clock helper 38\nc7108c0 docs: readme section 37\n1eec754 chore: changelog entry 36\nb133e45 feat: add fmt35 helper\n1427217 fix: restore legacy import path\n33de1c5 feat: clock helper 33\n43f9464 docs: readme section 32\n7371ec0 chore: changelog entry 31\ne35a252 fix: clearer empty-duration error\n20e070e test: tidy test file (29)\n73ec2e1 feat: clock helper 28\nbf4b959 docs: readme section 27\na7447ef chore: changelog entry 26\nad01046 feat: add fmt25 helper\ne7a64a8 test: tidy test file (24)\n6f3795a perf: precompile duration regex\ncb6b796 docs: readme section 22\n4f0c801 chore: changelog entry 21\n77afa80 feat: add fmt20 helper\n7fd18c8 test: tidy test file (19)\nfc428fa feat: clock helper 18\n7035070 docs: readme section 17\nda9c549 chore: changelog entry 16\n914550a docs: clarify parse_duration docstring\n91ec935 test: tidy test file (14)\n7e5de63 feat: clock helper 13\nb895163 docs: readme section 12\n623df59 chore: changelog entry 11\n8b5cf7a feat: add fmt10 helper\n1cceb08 test: tidy test file (9)\nb2aa8d8 feat: clock helper 8\n5a29fc8 feat: support day unit\ne84f131 chore: changelog entry 6\na81aff2 feat: add fmt5 helper\nac32314 test: tidy test file (4)\n0229aa9 feat: clock helper 3\n96ecccf docs: readme section 2\n0d8b4a8 chore: changelog entry 1\nf7045f5 init project\nrepo/README.md\nrepo/CHANGELOG.md\nrepo/timeutil/legacy.py\nrepo/timeutil/clock18.py\nrepo/timeutil/clock13.py\nrepo/timeutil/durations.py\nrepo/timeutil/clock28.py\nrepo/timeutil/clock38.py\nrepo/timeutil/fmt40.py\nrepo/timeutil/__init__.py\nrepo/timeutil/fmt10.py\nrepo/timeutil/clock8.py\nrepo/timeutil/fmt25.py\nrepo/timeutil/fmt35.py\nrepo/timeutil/fmt5.py\nrepo/timeutil/clock3.py\nrepo/timeutil/clock33.py\nrepo/timeutil/fmt20.py\nrepo/tests/test_durations.py\n", "exit_code": 0, "status": "completed"}}
{"type": "item.started", "item": {"id": "item_2", "type": "command_execution", "command": "/bin/bash -lc 'cat repo/timeutil/durations.py repo/timeutil/legacy.py repo/timeutil/__init__.py repo/tests/test_durations.py; git -C repo log -p -- timeutil/durations.py timeutil/legacy.py'", "aggregated_output": "", "exit_code": null, "status": "in_progress"}}
{"type": "item.completed", "item": {"id": "item_2", "type": "command_execution", "command": "/bin/bash -lc 'cat repo/timeutil/durations.py repo/timeutil/legacy.py repo/timeutil/__init__.py repo/tests/test_durations.py; git -C repo log -p -- timeutil/durations.py timeutil/legacy.py'", "aggregated_output": "import re\n_PART = re.compile(r\"(\\d+)\\s*([dhms])\")\nUNITS = {\"d\": 86400, \"h\": 3600, \"m\": 60, \"s\": 1}\ndef parse_duration(text):\n \"\"\"'1h30m' -> 5400. Units d/h/m/s, any order, optional spaces between parts.\"\"\"\n text = text.strip().lower()\n if not text:\n raise ValueError(\"empty duration string\")\n m = _PART.match(text)\n if not m or re.sub(r\"(\\d+)\\s*([dhms])|\\s+\", \"\", text):\n raise ValueError(f\"bad duration: {text!r}\")\n return int(m.group(1)) * UNITS[m.group(2)]\nfrom .durations import parse_duration as parse\nimport sys, os\nsys.path.insert(0, os.path.join(os.path.dirname(__file__), \"..\"))\nfrom timeutil.durations import parse_duration\n# run 39\ndef test_single():\n assert parse_duration(\"90s\") == 90 and parse_duration(\"2m\") == 120 and parse_duration(\"1h\") == 3600\nif __name__ == \"__main__\":\n test_single(); print(\"ok\")\ncommit 14272170a41f42d9bcac24ea53fa42a96ddf83aa\nAuthor: Lena Fischer <[REDACTED:email]>\nDate: Wed Mar 18 12:00:00 2026 +0000\n\n fix: restore legacy import path\n\ndiff --git a/timeutil/legacy.py b/timeutil/legacy.py\nnew file mode 100644\nindex 0000000..0475b76\n--- /dev/null\n+++ b/timeutil/legacy.py\n@@ -0,0 +1 @@\n+from .durations import parse_duration as parse\n\ncommit e35a252346e28b8a4d0212c10686593be88fd561\nAuthor: Tom Reyes <[REDACTED:email]>\nDate: Mon Mar 16 16:00:00 2026 +0000\n\n fix: clearer empty-duration error\n\ndiff --git a/timeutil/durations.py b/timeutil/durations.py\nindex 74a619f..e9622a8 100644\n--- a/timeutil/durations.py\n+++ b/timeutil/durations.py\n@@ -5,7 +5,7 @@ def parse_duration(text):\n \"\"\"'1h30m' -> 5400. Units d/h/m/s, any order, optional spaces between parts.\"\"\"\n text = text.strip().lower()\n if not text:\n- raise ValueError(\"empty duration\")\n+ raise ValueError(\"empty duration string\")\n m = _PART.match(text)\n if not m or re.sub(r\"(\\d+)\\s*([dhms])|\\s+\", \"\", text):\n raise ValueError(f\"bad duration: {text!r}\")\n\ncommit 6f3795adedc77068638d7df04a8836ea30080bb3\nAuthor: Mira Okafor <[REDACTED:email]>\nDate: Fri Mar 13 09:00:00 2026 +0000\n\n perf: precompile duration regex\n\ndiff --git a/timeutil/durations.py b/timeutil/durations.py\nindex 652ce71..74a619f 100644\n--- a/timeutil/durations.py\n+++ b/timeutil/durations.py\n@@ -1,11 +1,12 @@\n import re\n+_PART = re.compile(r\"(\\d+)\\s*([dhms])\")\n UNITS = {\"d\": 86400, \"h\": 3600, \"m\": 60, \"s\": 1}\n def parse_duration(text):\n- \"\"\"Parse a duration, e.g. '1h30m' -> 5400. Units d/h/m/s, any order, optional spaces between parts.\"\"\"\n+ \"\"\"'1h30m' -> 5400. Units d/h/m/s, any order, optional spaces between parts.\"\"\"\n text = text.strip().lower()\n if not text:\n raise ValueError(\"empty duration\")\n- parts = re.findall(r\"(\\d+)\\s*([dhms])\", text)\n- if not parts or re.sub(r\"(\\d+)\\s*([dhms])|\\s+\", \"\", text):\n+ m = _PART.match(text)\n+ if not m or re.sub(r\"(\\d+)\\s*([dhms])|\\s+\", \"\", text):\n raise ValueError(f\"bad duration: {text!r}\")\n- return sum(int(n) * UNITS[u] for n, u in parts)\n+ return int(m.group(1)) * UNITS[m.group(2)]\n\ncommit 914550a548da4066b4b68d9d059c02df3239f172\nAuthor: Tom Reyes <[REDACTED:email]>\nDate: Mon Mar 9 09:00:00 2026 +0000\n\n docs: clarify parse_duration docstring\n\ndiff --git a/timeutil/durations.py b/timeutil/durations.py\nindex 54f1365..652ce71 100644\n--- a/timeutil/durations.py\n+++ b/timeutil/durations.py\n@@ -1,7 +1,7 @@\n import re\n UNITS = {\"d\": 86400, \"h\": 3600, \"m\": 60, \"s\": 1}\n def parse_duration(text):\n- \"\"\"'1h30m' -> 5400. Units d/h/m/s, any order, optional spaces between parts.\"\"\"\n+ \"\"\"Parse a duration, e.g. '1h30m' -> 5400. Units d/h/m/s, any order, optional spaces between parts.\"\"\"\n text = text.strip().lower()\n if not text:\n raise ValueError(\"empty duration\")\n\ncommit 5a29fc865d29af0de3323613bb97edac24208930\nAuthor: Lena Fischer <[REDACTED:email]>\nDate: Thu Mar 5 09:00:00 2026 +0000\n\n feat: support day unit\n\ndiff --git a/timeutil/durations.py b/timeutil/durations.py\nindex 063f5ac..54f1365 100644\n--- a/timeutil/durations.py\n+++ b/timeutil/durations.py\n@@ -1,11 +1,11 @@\n import re\n-UNITS = {\"h\": 3600, \"m\": 60, \"s\": 1}\n+UNITS = {\"d\": 86400, \"h\": 3600, \"m\": 60, \"s\": 1}\n def parse_duration(text):\n- \"\"\"'1h30m' -> 5400. Units h/m/s, any order, optional spaces between parts.\"\"\"\n+ \"\"\"'1h30m' -> 5400. Units d/h/m/s, any order, optional spaces between parts.\"\"\"\n text = text.strip().lower()\n if not text:\n raise ValueError(\"empty duration\")\n- parts = re.findall(r\"(\\d+)\\s*([hms])\", text)\n- if not parts or re.sub(r\"(\\d+)\\s*([hms])|\\s+\", \"\", text):\n+ parts = re.findall(r\"(\\d+)\\s*([dhms])\", text)\n+ if not parts or re.sub(r\"(\\d+)\\s*([dhms])|\\s+\", \"\", text):\n raise ValueError(f\"bad duration: {text!r}\")\n return sum(int(n) * UNITS[u] for n, u in parts)\n\ncommit f7045f5c03d2aaa3c27b4b2f277a42aaf428986b\nAuthor: Mira Okafor <[REDACTED:email]>\nDate: Sun Mar 1 10:00:00 2026 +0000\n\n init project\n\ndiff --git a/timeutil/durations.py b/timeutil/durations.py\nnew file mode 100644\nindex 0000000..063f5ac\n--- /dev/null\n+++ b/timeutil/durations.py\n@@ -0,0 +1,11 @@\n+import re\n+UNITS = {\"h\": 3600, \"m\": 60, \"s\": 1}\n+def parse_duration(text):\n+ \"\"\"'1h30m' -> 5400. Units h/m/s, any order, optional spaces between parts.\"\"\"\n+ text = text.strip().lower()\n+ if not text:\n+ raise ValueError(\"empty duration\")\n+ parts = re.findall(r\"(\\d+)\\s*([hms])\", text)\n+ if not parts or re.sub(r\"(\\d+)\\s*([hms])|\\s+\", \"\", text):\n+ raise ValueError(f\"bad duration: {text!r}\")\n+ return sum(int(n) * UNITS[u] for n, u in parts)\n", "exit_code": 0, "status": "completed"}}
{"type": "item.started", "item": {"id": "item_3", "type": "command_execution", "command": "/bin/bash -lc \"python - <<'PY'\nimport subprocess\nfrom pathlib import Path\ncommits = subprocess.check_output(['git','-C','repo','rev-list','--reverse','main'],text=True).splitlines()\nfirst_bad = None\nfor sha in commits:\n source = subprocess.check_output(['git','-C','repo','show',f'{sha}:timeutil/durations.py'],text=True)\n namespace = {}\n exec(source, namespace)\n result = namespace['parse_duration']('1h30m')\n if result \"'!= 5400 and first_bad is None:\n first_bad = sha\n print(f'\"'First bad: {sha}: {result}')\nassert first_bad == '6f3795adedc77068638d7df04a8836ea30080bb3'\nPath('FIRST_BAD.txt').write_text(first_bad + '\\\\n')\nprint(f'Checked all {len(commits)} commits in chronological order.')\nPY\"", "aggregated_output": "", "exit_code": null, "status": "in_progress"}}
{"type": "item.completed", "item": {"id": "item_3", "type": "command_execution", "command": "/bin/bash -lc \"python - <<'PY'\nimport subprocess\nfrom pathlib import Path\ncommits = subprocess.check_output(['git','-C','repo','rev-list','--reverse','main'],text=True).splitlines()\nfirst_bad = None\nfor sha in commits:\n source = subprocess.check_output(['git','-C','repo','show',f'{sha}:timeutil/durations.py'],text=True)\n namespace = {}\n exec(source, namespace)\n result = namespace['parse_duration']('1h30m')\n if result \"'!= 5400 and first_bad is None:\n first_bad = sha\n print(f'\"'First bad: {sha}: {result}')\nassert first_bad == '6f3795adedc77068638d7df04a8836ea30080bb3'\nPath('FIRST_BAD.txt').write_text(first_bad + '\\\\n')\nprint(f'Checked all {len(commits)} commits in chronological order.')\nPY\"", "aggregated_output": "/bin/bash: line 1: python: command not found\n", "exit_code": 127, "status": "failed"}}
{"type": "item.started", "item": {"id": "item_4", "type": "file_change", "changes": [{"path": "/home/bob/usecase-runs/batch/out/gpt-6.1-sol/172_f02/work/repo/tests/test_duration_regression.py", "kind": "add"}, {"path": "/home/bob/usecase-runs/batch/out/gpt-6.1-sol/172_f02/work/repo/timeutil/durations.py", "kind": "update"}], "status": "in_progress"}}
{"type": "item.completed", "item": {"id": "item_4", "type": "file_change", "changes": [{"path": "/home/bob/usecase-runs/batch/out/gpt-6.1-sol/172_f02/work/repo/tests/test_duration_regression.py", "kind": "add"}, {"path": "/home/bob/usecase-runs/batch/out/gpt-6.1-sol/172_f02/work/repo/timeutil/durations.py", "kind": "update"}], "status": "completed"}}
{"type": "item.started", "item": {"id": "item_5", "type": "command_execution", "command": "/bin/bash -lc \"python3 - <<'PY'\nimport subprocess, pathlib, sys, runpy\ncommits = subprocess.check_output(['git','-C','repo','rev-list','--reverse','main'],text=True).splitlines()\nfirst_bad = None\nfor sha in commits:\n namespace = {}\n exec(subprocess.check_output(['git','-C','repo','show',f'{sha}:timeutil/durations.py'],text=True), namespace)\n if namespace['parse_duration']('1h30m') \"'!= 5400 and first_bad is None:\n first_bad = sha\nassert first_bad == '\"'6f3795adedc77068638d7df04a8836ea30080bb3'\npathlib.Path('FIRST_BAD.txt').write_text(first_bad + '\\\\n')\nprint(f'Checked all {len(commits)} commits; first bad: {first_bad}')\nsys.path.insert(0,str(pathlib.Path('repo').resolve()))\ncount = 0\nfor path in sorted(pathlib.Path('repo/tests').glob('*.py')):\n namespace = runpy.run_path(str(path))\n for name, function in namespace.items():\n if name.startswith('test_') and callable(function):\n function()\n count += 1\nprint(f'All {count} test functions passed')\nold = {}\nexec(subprocess.check_output(['git','-C','repo','show','HEAD:timeutil/durations.py'],text=True),old)\nregression = runpy.run_path('repo/tests/test_duration_regression.py')\nregression['test_multiple_parts'].__globals__['parse_duration'] = old['parse_duration']\ntry:\n regression['test_multiple_parts']()\nexcept AssertionError:\n print('Confirmed regression test fails on original main')\nelse:\n raise AssertionError('Regression test did not detect bug')\nPY\"", "aggregated_output": "", "exit_code": null, "status": "in_progress"}}
{"type": "item.completed", "item": {"id": "item_5", "type": "command_execution", "command": "/bin/bash -lc \"python3 - <<'PY'\nimport subprocess, pathlib, sys, runpy\ncommits = subprocess.check_output(['git','-C','repo','rev-list','--reverse','main'],text=True).splitlines()\nfirst_bad = None\nfor sha in commits:\n namespace = {}\n exec(subprocess.check_output(['git','-C','repo','show',f'{sha}:timeutil/durations.py'],text=True), namespace)\n if namespace['parse_duration']('1h30m') \"'!= 5400 and first_bad is None:\n first_bad = sha\nassert first_bad == '\"'6f3795adedc77068638d7df04a8836ea30080bb3'\npathlib.Path('FIRST_BAD.txt').write_text(first_bad + '\\\\n')\nprint(f'Checked all {len(commits)} commits; first bad: {first_bad}')\nsys.path.insert(0,str(pathlib.Path('repo').resolve()))\ncount = 0\nfor path in sorted(pathlib.Path('repo/tests').glob('*.py')):\n namespace = runpy.run_path(str(path))\n for name, function in namespace.items():\n if name.startswith('test_') and callable(function):\n function()\n count += 1\nprint(f'All {count} test functions passed')\nold = {}\nexec(subprocess.check_output(['git','-C','repo','show','HEAD:timeutil/durations.py'],text=True),old)\nregression = runpy.run_path('repo/tests/test_duration_regression.py')\nregression['test_multiple_parts'].__globals__['parse_duration'] = old['parse_duration']\ntry:\n regression['test_multiple_parts']()\nexcept AssertionError:\n print('Confirmed regression test fails on original main')\nelse:\n raise AssertionError('Regression test did not detect bug')\nPY\"", "aggregated_output": "Checked all 42 commits; first bad: 6f3795adedc77068638d7df04a8836ea30080bb3\nAll 3 test functions passed\nConfirmed regression test fails on original main\n", "exit_code": 0, "status": "completed"}}
{"type": "item.completed", "item": {"id": "item_6", "type": "agent_message", "text": "The first bad commit is `6f3795adedc77068638d7df04a8836ea30080bb3`; I checked all 42 commits in order. The fix sums all duration parts and leaves validation unchanged. All three test functions pass, and the new regression test fails on the original code. I\u2019ll commit the fix now."}}
{"type": "item.started", "item": {"id": "item_7", "type": "command_execution", "command": "/bin/bash -lc 'git -C repo diff --check; git -C repo add timeutil/durations.py tests/test_duration_regression.py; git -C repo commit -m \"Fix multi-part duration accumulation\" -m \"Fixes 6f3795adedc77068638d7df04a8836ea30080bb3\"; git -C repo status --short; git -C repo branch --show-current; cat FIRST_BAD.txt'", "aggregated_output": "", "exit_code": null, "status": "in_progress"}}
{"type": "item.completed", "item": {"id": "item_7", "type": "command_execution", "command": "/bin/bash -lc 'git -C repo diff --check; git -C repo add timeutil/durations.py tests/test_duration_regression.py; git -C repo commit -m \"Fix multi-part duration accumulation\" -m \"Fixes 6f3795adedc77068638d7df04a8836ea30080bb3\"; git -C repo status --short; git -C repo branch --show-current; cat FIRST_BAD.txt'", "aggregated_output": "[main 5ee794c] Fix multi-part duration accumulation\n 2 files changed, 35 insertions(+), 1 deletion(-)\n create mode 100644 tests/test_duration_regression.py\n?? timeutil/__pycache__/\nmain\n6f3795adedc77068638d7df04a8836ea30080bb3\n", "exit_code": 0, "status": "completed"}}
{"type": "item.started", "item": {"id": "item_8", "type": "command_execution", "command": "/bin/bash -lc \"python3 - <<'PY'\nfrom pathlib import Path\nimport shutil\nfor path in Path('repo').rglob('__pycache__'):\n shutil.rmtree(path)\nPY\n git -C repo status --porcelain\"", "aggregated_output": "", "exit_code": null, "status": "in_progress"}}
{"type": "item.completed", "item": {"id": "item_8", "type": "command_execution", "command": "/bin/bash -lc \"python3 - <<'PY'\nfrom pathlib import Path\nimport shutil\nfor path in Path('repo').rglob('__pycache__'):\n shutil.rmtree(path)\nPY\n git -C repo status --porcelain\"", "aggregated_output": "", "exit_code": 0, "status": "completed"}}
{"type": "item.completed", "item": {"id": "item_9", "type": "agent_message", "text": "First bad commit: `6f3795adedc77068638d7df04a8836ea30080bb3`, recorded in `FIRST_BAD.txt`.\n\nFix committed on `main` as `5ee794c`, with the required `Fixes` reference. Validation, error messages, and the legacy import remain unchanged.\n\nAll three tests pass; the new regression test fails on the original code. `main` is checked out and the working tree is clean."}}
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