mcpbeat

Bootstrap Repo Analysis

langchain-ai/bootstrap-repo-analysis

First-time analysis of a repository with no prior reviewer outcomes. Crawl historical merged-PR review feedback with the gh CLI (plus any preloaded samples), extract the team's review norms, and synthesize the initial per-repo review-style prompt. Use this for a cold-start repo; use continual-learning instead once the reviewer has accumulated finding outcomes.

736 tokens
context cost
the whole folder, loaded on every use
1
files
instructions only
0
copies elsewhere
how many repositories repackaged it
10433
stars on the repo
on the repository, not the skill itself

Install

one command, takes just this skill from the repository
npx skills add https://github.com/langchain-ai/open-swe --skill bootstrap-repo-analysis

The instruction itself

4 sections, as written by the author

Bootstrap repo analysis

You are writing the first review-style prompt for the repository named in the

system prompt. There is no outcomes history yet, so your signal comes entirely from

the repo's own historical PR review feedback. Do not call read_finding_outcomes in

this mode — it will be empty.

Always invoke gh as: GH_TOKEN=dummy gh <command>.

1. Research (required)

Browse historical merged PR review feedback until you have catalogued at least

8 substantive human review comments (skip [bot] accounts and obvious automation

like codecov / dependabot). Useful commands:

GH_TOKEN=dummy gh pr list --repo <owner>/<repo> --state merged --limit 30
GH_TOKEN=dummy gh api repos/<owner>/<repo>/pulls/<PR_NUMBER>/reviews
GH_TOKEN=dummy gh api repos/<owner>/<repo>/pulls/<PR_NUMBER>/comments
GH_TOKEN=dummy gh api repos/<owner>/<repo>/issues/<PR_NUMBER>/comments

If the first batch is sparse, raise --limit or walk older PR numbers. The user

message may include preloaded samples — verify and extend them with gh, don't

just trust them.

Identify the top ~5 human reviewers by volume and note their phrasing, what severity

they assign, and what they routinely ignore.

2. Extract concrete, repo-specific patterns

The highest-value content is a bug taxonomy tied to this repo's stack — concrete

"hunt for X" rules a maintainer would catch on first read — plus a calibrated "do not

flag" list. Pair each pattern with the failure mode and, where you saw it, the kind of

diff that triggered it. Avoid generic advice that would apply to any repo.

Cover:

  • What the team routinely flags vs. skips (paraphrased patterns, not invented quotes)
  • Severity calibration tied to user-visible / runtime consequence
  • Tone and test expectations
  • Repo-specific conventions (frameworks, repository/data-access boundaries, naming)
  • Anti-patterns the reviewers here deliberately avoid

Stay aligned with the reviewer-agent themes in the system prompt (high-signal,

diff-anchored defects — not nits).

3. Save

Only after real research, call save_review_style_prompt once with:

  • custom_prompt: 400–1200 words teaching the reviewer this repo's norms.
  • analysis_summary: 2–4 sentences for the dashboard.
  • top_reviewers (comma-separated logins), prs_sampled, reviews_sampled.

Do not save a generic guide after one or two commands. Only after ~25+ merged PRs

with zero human feedback may you save a short, conservative guide — and say so in

analysis_summary.

How to use it

Copy the folder

Take langchain-ai/bootstrap-repo-analysis from the repository into ~/.claude/skills for personal use, or into .claude/skills inside a project.

Check the name does not clash

The agent identifies a skill by the name field in its header. Two skills with the same name cannot sit side by side — one of them will be ignored.