github-deep-review

A GitHub code-review workflow that examines issues and pull requests together with the relevant source code. It focuses on finding the actual cause of a bug and marking conclusions as unproven when the evidence is weak.

In plain words
What is it for?
Use it to investigate GitHub issues, review pull requests, compare possible fixes, and decide whether a broader code redesign is justified.
Why use it?
It reduces the risk of approving a plausible-sounding fix without understanding the code or the bug. It also helps distinguish a real problem from an outdated or invalid report.

Skill for Claude CodeCodex

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add skills/steipete/agent-scripts/github-deep-review
Any agent
npx skills add steipete/agent-scripts --skill github-deep-review
Clone the repo
git clone --depth 1 https://github.com/steipete/agent-scripts

Made for: Claude Code, Codex.

Per session 26 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,529 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5 $0.00026 $0.01529
Opus 5 $0.00013 $0.00764
Sonnet 5 $0.00005 $0.00306
Haiku 4.5 $0.00003 $0.00153

Measured 2d ago against content hash bfad7e3dd87a, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

github-deep-review scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

skills/github-deep-review/SKILL.md · 126 lines

How it starts

The opening of the file, as written. The whole thing — 126 lines — stays where its author put it; the contents beside it link to each section on GitHub.

GitHub Deep Review

Review like Peter: high-confidence, evidence-first, code-aware, and willing to say "not proven" when the trail is weak. The goal is not a generic summary. The goal is to understand the bug class, find the real cause if possible, decide the best fix after reading enough code, and call out whether a larger refactor would improve the design.

Start

Use gh, not web browsing, for GitHub refs:

gh issue view <n> --json number,title,state,author,body,comments,labels,updatedAt,url
gh pr view <n> --json number,title,state,author,body,comments,reviews,files,commits,statusCheckRollup,mergeStateStatus,headRefName,headRepositoryOwner,url
gh pr diff <n> --patch

For PRs, collect author context by default unless the author is Peter (steipete or an obvious Peter-owned account). Use the local workflow in ~/Projects/agent-scripts/skills/github-author-context/SKILL.md and include a short Author context: block near the top of the review when the author is not Peter. After merge/rejection/close/review, use that same author-context workflow to append a contributor note only when the interaction creates durable future-review signal.

For repo-local review, also inspect:

git status --short --branch
git fetch origin
git log --oneline --decorate -20
rg "<key symbol/error/config/endpoint>"

If the repo has local instructions, issue/PR skills, docs lists, test guidance, or maintainer runbooks, read those before deciding.

Review Contract

Always answer these, explicitly:

  • URL/ref: issue or PR number and affected surface.
  • What is the bug or behavior being fixed?
  • Can we identify the root cause? If yes, where in code and why. If no, what evidence is missing.
  • For regressions, who/what introduced it and when? Include commit/PR provenance when traceable by bounded history; say unknown instead of guessing.
  • Is the current/proposed fix the best possible fix after reading adjacent code?
  • Would a bigger refactor improve correctness, clarity, or future maintainability?
  • What proof exists: tests, live repro, CI checks, docs, dependency docs/source, shipped/current behavior.
  • What remains risky or unverified.

Read the full file on GitHub · 126 lines

Files

What ships with it

1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 2d ago First seen · 126 lines · 26 tokens per session scan A bfad7e3dd87a

Subscribe to this mod's changes

github-deep-review is a skill published in the GitHub repository steipete/agent-scripts (6,580 stars, last pushed 2d ago), licensed MIT. It adds 26 tokens to every session and 1,529 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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