Finishing a Development Branch
obra/superpowers
Walks the last step of a branch: confirm tests pass, detect the git environment, ask how to integrate, carry out your choice and clean up the worktree.
Find the exact commit that introduced a bug. An agent skill from Archive228/loopkit.
Install Bisect Regression
$ npx skills add Archive228/loopkit --skill bisect-regression -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install Archive228/loopkit bisect-regression --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/Archive228/loopkit.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/bisect-regression .claude/skills/bisect-regression && rm -rf skills-srcUse ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.
Claude Code skills documentation · loads skills from .claude/skills/
Install the "bisect-regression" agent skill from https://github.com/Archive228/loopkit/tree/main/skills/bisect-regression into .claude/skills/bisect-regression/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "bisect-regression", then confirm the skill loads.Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$skill-installer install https://github.com/Archive228/loopkit/tree/main/skills/bisect-regressionType this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.
$ npx skills add Archive228/loopkit --skill bisect-regression -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install Archive228/loopkit bisect-regression --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/Archive228/loopkit.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/bisect-regression .agents/skills/bisect-regression && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "bisect-regression" agent skill from https://github.com/Archive228/loopkit/tree/main/skills/bisect-regression into .agents/skills/bisect-regression/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "bisect-regression", then confirm the skill loads.Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add Archive228/loopkit --skill bisect-regression -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install Archive228/loopkit bisect-regression --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/Archive228/loopkit.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/bisect-regression .cursor/skills/bisect-regression && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "bisect-regression" agent skill from https://github.com/Archive228/loopkit/tree/main/skills/bisect-regression into .cursor/skills/bisect-regression/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "bisect-regression", then confirm the skill loads.Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gemini skills install https://github.com/Archive228/loopkit.git --path skills/bisect-regression--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add Archive228/loopkit --skill bisect-regression -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install Archive228/loopkit bisect-regression --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/Archive228/loopkit.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/bisect-regression .gemini/skills/bisect-regression && rm -rf skills-srcUse ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.
Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/
Install the "bisect-regression" agent skill from https://github.com/Archive228/loopkit/tree/main/skills/bisect-regression into .gemini/skills/bisect-regression/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "bisect-regression", then confirm the skill loads.Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gh skill install Archive228/loopkit bisect-regressionInstalls for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).
$ npx skills add Archive228/loopkit --skill bisect-regression -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/Archive228/loopkit.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/bisect-regression .github/skills/bisect-regression && rm -rf skills-srcUse ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.
GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/
Install the "bisect-regression" agent skill from https://github.com/Archive228/loopkit/tree/main/skills/bisect-regression into .github/skills/bisect-regression/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "bisect-regression", then confirm the skill loads.GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add Archive228/loopkit --skill bisect-regression -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install Archive228/loopkit bisect-regression --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/Archive228/loopkit.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/bisect-regression .opencode/skills/bisect-regression && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "bisect-regression" agent skill from https://github.com/Archive228/loopkit/tree/main/skills/bisect-regression into .opencode/skills/bisect-regression/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "bisect-regression", then confirm the skill loads.OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
Facts
- Skill name
bisect-regression- GitHub stars
- 756
- Token cost
- ~207 tokens
- SKILL.md length
- 98 words
- Files
- 1
- Skills in repo
- 43
- Repo updated
- First seen
- Licence
- MIT
At a glance
Find the exact commit that introduced a bug. An agent skill from Archive228/loopkit.
- Works in 5 steps: Find a known-good commit and a known-bad… → git bisect start; git bisect bad ; git… → At each step, run the SMALLEST test that… → …
- Something worked before and broke
- Calls git
- You dont know which change did it
What it does
Bisect Regression is an agent skill from Archive228/loopkit. Find the exact commit that introduced a bug. Use when something worked before and broke, and you don't know which change did it.
Its SKILL.md is about 210 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.
It sits in Development. It works with Git. The repository describes itself as: 33 battle-tested skills + minimal .claude harness for any coding agent (Claude Code, Cursor, Codex, Gemini CLI). The licence is MIT.
When your agent uses it
- Something worked before and broke
- You dont know which change did it
Example prompts
- “/bisect-regression”
Workflow steps
5 steps, taken from the first numbered list in SKILL.md.
- Find a known-good commit and a known-bad one. Confirm both by actually checking out and testing.
- git bisect start; git bisect bad ; git bisect good .
- At each step, run the SMALLEST test that distinguishes good from bad. Mark git bisect good/bad.
- When git names the first bad commit, read its diff. The bug is in those lines — don't guess elsewhere.
- git bisect reset. Report: the commit, the line, the one-sentence cause.
What it can do on your machine
Read from SKILL.md and the folder at commit 5ae033e. It shows what the files ask for, not the result of running them.
Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
Shell commands in SKILL.md call:
git
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md. Its commands use git, which can reach the network depending on how they are called.
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.
Context cost
Bisect Regression loads about 207 tokens when it runs. Until then it costs about 37 tokens; SKILL.md has 98 words of instructions outside code blocks.
Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.
Safety
Auto-check passed
The automated check found no risky patterns in SKILL.md.
Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.
SKILL.md
The full file from Archive228/loopkit at commit 5ae033e, republished under its MIT licence (© Archive228). 98 words, ~207 tokens.
Download SKILL.mdSave it as
.claude/skills/bisect-regression/SKILL.md (or your agent's skills folder).- name
- bisect-regression
- description
- Find the exact commit that introduced a bug. Use when something worked before and broke, and you don't know which change did it.
- when_to_use
- "it worked last week", a regression, unclear which commit broke it
Bisect the Regression
- Find a known-good commit and a known-bad one. Confirm both by actually checking out and testing.
git bisect start; git bisect bad <bad>; git bisect good <good>.- At each step, run the SMALLEST test that distinguishes good from bad. Mark
git bisect good/bad. - When git names the first bad commit, read its diff. The bug is in those lines — don't guess elsewhere.
git bisect reset. Report: the commit, the line, the one-sentence cause. Automate it:git bisect run ./repro.shif you have a script that exits non-zero on the bug.
© Archive228, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file
Files
Just SKILL.md in skills/bisect-regression of Archive228/loopkit.
Open the folder on GitHubat commit 5ae033e
Compare with similar skills
Bisect Regression next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| Bisect Regression this skillArchive228/loopkit | 756 | — | ~207 | Automated safety check: Pass | MIT | |
| Finishing a Development Branchobra/superpowers | 296k | 5 repos | ~1.9k | Automated safety check: Pass | MIT | |
| Code Review ChecklistshareAI-lab/learn-claude-code | 78k | 5 repos | ~1.1k | Automated safety check: Pass | MIT | |
| Codebase Knowledge Graph Q&AEgonex-AI/Understand-Anything | 86k | 1 repos | ~1.2k | Automated safety check: Pass | MIT | |
| Code Design Rationale Investigatorcursor/plugins | 10k | 9 repos | ~2.6k | Automated safety check: Pass | None | |
| Understand Diff AnalysisEgonex-AI/Understand-Anything | 86k | 1 repos | ~1.4k | Automated safety check: Pass | MIT |
Similar skills
Code Review Checklist
shareAI-lab/learn-claude-code
Reviews code against a five-part checklist covering security, correctness, performance, maintainability and testing, and reports findings in a fixed format.
Codebase Knowledge Graph Q&A
Egonex-AI/Understand-Anything
Answers questions about a codebase by searching a prebuilt knowledge graph of its files, functions, classes and dependencies, not by rereading every source file.
- Official
Code Design Rationale Investigator
cursor/plugins
Digs into why code is shaped the way it is by checking git history, pull requests and connected tools in parallel, then reporting a cited read on the tradeoffs.
Understand Diff Analysis
Egonex-AI/Understand-Anything
Reads your git changes or a pull request against a prebuilt knowledge graph of the project to explain what changed, which components are affected and what is risky.
Understand Explain
Egonex-AI/Understand-Anything
Gives an in-depth explanation of one file, function or module by reading the project's knowledge graph and checking that the graph is still fresh.
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Related
Works with
Categories
Questions about Bisect Regression
What does Bisect Regression do?
Find the exact commit that introduced a bug. An agent skill from Archive228/loopkit. Bisect Regression is an agent skill from Archive228/loopkit. Find the exact commit that introduced a bug.
When should I use Bisect Regression?
Bisect Regression fits situations like: something worked before and broke; you dont know which change did it.
How do I install Bisect Regression in Claude Code?
Run `npx skills add Archive228/loopkit --skill bisect-regression -a claude-code`. Or copy the skill folder (skills/bisect-regression in Archive228/loopkit) into .claude/skills/bisect-regression in your project. Claude Code loads it when a task matches its description.
How do I install Bisect Regression in Codex?
Run `npx skills add Archive228/loopkit --skill bisect-regression -a codex`. Or copy the skill folder (skills/bisect-regression in Archive228/loopkit) into .agents/skills/bisect-regression in your project. Codex loads it when a task matches its description.
Can I use Bisect Regression in Cursor, Gemini CLI or GitHub Copilot?
Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add Archive228/loopkit --skill bisect-regression -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/bisect-regression, .gemini/skills/bisect-regression, .github/skills/bisect-regression and .opencode/skills/bisect-regression in your project.
What does Bisect Regression need to run?
Going by SKILL.md and its folder, Bisect Regression needs the command-line tools its instructions call (git).
Does Bisect Regression access the network?
SKILL.md contains no URLs. Its commands use git, which can reach the network depending on how they are called. This is read from the text; nothing was executed.
Is Bisect Regression safe to install?
Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.
What licence does Bisect Regression use?
Bisect Regression is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.
How many tokens does Bisect Regression use?
About 207 tokens (SKILL.md is roughly 828 characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.
What are the alternatives to Bisect Regression?
Skills that share tags, products or a category with Bisect Regression: Finishing a Development Branch (obra/superpowers, 296k stars), Code Review Checklist (shareAI-lab/learn-claude-code, 78k stars), Codebase Knowledge Graph Q&A (Egonex-AI/Understand-Anything, 86k stars) and Code Design Rationale Investigator (cursor/plugins, 10k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Bisect Regression?
Archive228 (a GitHub user) maintains it in Archive228/loopkit, which has 756 GitHub stars. The repository holds 43 skills in this directory. The repository was last updated on July 14, 2026.
Source: Archive228/loopkit on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.