Linear history with bad commit near beginning - model identifies early commit
Tests ability to identify an early commit as bad in a linear history. Evaluates bisect with the bug near the beginning.
Baseline Repository
These commands set up the repo before the model sees the prompt. They define the starting file structure, staged changes, and Git history.
- 01
git init - 02
git config user.email 'test@test.com' - 03
git config user.name 'Test User' - 04
echo '#!/bin/bash' > test.sh - 05
echo 'grep "TODO" README.md' >> test.sh - 06
chmod +x test.sh - 07
echo '# Project TODO: document setup' > README.md - 08
git add test.sh README.md - 09
git commit -m 'Initial commit' - 10
echo '# Project' > README.md - 11
git add README.md - 12
git commit -m 'remove setup todo' - 13
echo '## Features' >> README.md - 14
git add README.md - 15
git commit -m 'add features section' - 16
echo '## Installation' >> README.md - 17
git add README.md - 18
git commit -m 'add installation section'
Prompt
You are debugging a git repository. The following commit history has one bad commit that broke the build. Identify the bad commit hash (first 7 characters) or commit subject line that introduced the bug. Use the git log and test output to determine which commit is bad.
Your answer should be the commit hash (e.g., 'abc1234') or the commit subject line.
Expected
remove setup todo
Campaign Evidence
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Model Outputs (14)
0280398
Based on the test results, the first commit that fails is **dbe4a0a** (remove setup todo). Since the initial commit passes and this commit introduces the failure, it is the one that broke the build.
**dbe4a0a**
af457bb
JSON Schema
Structured Output
(raw) { "commit": "af457bb" }
The bad commit is `9c79de7` (or "remove setup todo"), as it is the first commit in the history where the tests started failing (exit code 1). All subsequent commits also fail, but the bug was introduced in `9c79de7`.
d844ee8
JSON Schema
Structured Output
(raw) {"commit": "d844ee8"}
dac5f8d
3e0c776
JSON Schema
Structured Output
(raw) {
"commit": "3e0c776"
}
c20fbf3
JSON Schema
Structured Output
(raw) { "commit": "c20fbf3" }
Looking at the test results chronologically:
- **3113cb2 Initial commit**: PASS
- **453353f remove setup todo**: FAIL (first failure)
- **bb80382 add features section**: FAIL
- **80fa01a add installation section**: FAIL
The build was passing after the initial commit, but failed after commit `453353f`. This indicates that commit `453353f` ("remove setup todo") introduced the bug.
**Answer: 453353f**
8900e60
JSON Schema
Structured Output
(raw) {"commit":"8900e60"}
Looking at the test results, I can see that:
- Commit `2cbdceb` (Initial commit): PASS
- Commit `3da3980` (remove setup todo): FAIL
The build was passing after the initial commit, but failed after commit `3da3980`. This means commit `3da3980` introduced the bug.
The bad commit is: **3da3980** (or "remove setup todo" if you prefer the subject line).
ba73812
JSON Schema
Structured Output
(raw) {"commit": "ba73812"}
Invalid JSON. Output: 918a236
JSON Schema
Structured Output
Structured Output Error
Failed to parse structured JSON response: Extra data: line 1 column 4 (char 3)
Failure: Failed to parse structured JSON response: Extra data: line 1 column 4 (char 3)
abc1234 add installation section
Failure: Expected target hash/prefix or subject 'remove setup todo'