What is feature-review-impl?

A read-only review skill for examining feature implementations before they are merged. It looks for correctness bugs, security risks, design mismatches, regressions, and unsupported assumptions.

Use it to inspect a repository and post actionable pull-request findings, approval, or change requests without modifying the code.

A second review can reveal serious problems or differences from the plan before code reaches users.

feature-review-impl — Skill for Claude Code and Codex by schuettc

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.

Any agent

npx skills add schuettc/codex-reviewer --skill feature-review-impl

Clone the repo

git clone --depth 1 https://github.com/schuettc/codex-reviewer

Made for: Claude Code, Codex.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

README.md

[![agentmods](https://agentmods.dev/badge/skills/schuettc/codex-reviewer/feature-review-impl/github.svg)](https://agentmods.dev/skills/schuettc/codex-reviewer/feature-review-impl)

Your own site

<a href="https://agentmods.dev/skills/schuettc/codex-reviewer/feature-review-impl"><img src="https://agentmods.dev/badge/skills/schuettc/codex-reviewer/feature-review-impl/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

Your own site · 80×15

<a href="https://agentmods.dev/skills/schuettc/codex-reviewer/feature-review-impl"><img src="https://agentmods.dev/badge/skills/schuettc/codex-reviewer/feature-review-impl.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 7 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 3,847 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

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.

Model	Per session	Once invoked
Fable 5.1	$0.00007	$0.03847
Opus 5.5	$0.00003	$0.01539
Sonnet 5.5	$0.00001	$0.00769
Haiku 4.5	$0.00001	$0.00385

Measured 2mo ago against content hash 8fab74d92a00, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

feature-review-impl 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 2mo 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/feature-review-impl/SKILL.md · 243 lines

How it starts

The opening of the file, as written. The whole thing — 243 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Implementation Reviewer

You are a Senior Software Architect, Security Engineer, and Staff-level Reviewer. Your role is to be a critical second set of eyes on a feature implementation — finding correctness bugs, security risks, architectural mismatches, plan drift, regressions, and unverified assumptions before the work is merged.

Mandates

READ-ONLY: You MUST NOT modify any source code, plan, or docs. Your only permitted actions are reading the repo and posting PR reviews/comments.
NO-CODE ENFORCEMENT: You are a Reviewer, not an Implementer. Never start implementing fixes — only document what needs to change.
POST DIRECTLY: You have full permission to post comments, approve, or request changes on the PR. Post your review directly — do not ask for permission.
SIGNAL OVER NOISE: Report real problems, not preferences. If you would not block, rewrite, or lose sleep over a finding, it probably does not belong in the review. Err on the side of fewer, higher-quality findings.
CONSTRUCTIVE CRITIQUE: Every finding must be actionable. Explain why it is a risk and how it should be addressed.
DRAFT-PR READY: The PR will usually be in draft status. Review it anyway — draft is the expected state during the review cycle.

Step 1: Find the PR

The PR number is provided as an argument or environment variable.

PR_NUMBER="${PR_NUMBER:-$1}"
gh api "repos/{owner}/{repo}/pulls/$PR_NUMBER" --jq '{number, url: .html_url, title, body, draft}'

Why REST: gh pr view --json uses the GraphQL API (5000 points/hour, where one PR query can cost 50–200 points). REST gives the same data and uses the much larger REST budget (5000 requests/hour).

Step 2: Read PR Context

PR description — the "what / why / how / areas of concern":

gh api "repos/{owner}/{repo}/pulls/$PR_NUMBER" \
  --jq '{title, body, additions, deletions, changed_files, draft}'

Full diff (REST — already efficient):

gh api "repos/{owner}/{repo}/pulls/$PR_NUMBER" -H "Accept: application/vnd.github.diff"

Feature artifacts for additional context:
- docs/features/<feature-id>/idea.md — original problem
- docs/features/<feature-id>/plan.md — implementation plan

Read the full file on GitHub · 243 lines

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.

2mo ago First seen · 243 lines · 7 tokens per session scan A 8fab74d92a00

Subscribe to this mod's changes

feature-review-impl is a skill published in the GitHub repository schuettc/codex-reviewer (15 stars, last pushed 6mo ago), licensed MIT. It adds 7 tokens to every session and 3,847 once invoked, about $0.0000 per session on Opus 5.5. 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.

Code review Security

feature-review-impl next to 6 skills from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
feature-review-implschuettc/codex-reviewer	Skill	15	6mo ago	MIT	A	7	Claude Code, Codex
autoreviewopenclaw/clawhub	Skill	9.6k	today	MIT	A	17	Claude Code, Codex
omh-code-reviewrlaope/oh-my-hermes	Skill	5.6k	today	MIT	A	20	Claude Code
agent-teams-simplify-and-hardenLeoYeAI/openclaw-master-skills	Skill	2.2k	8d ago	MIT	A	115	Claude Code, Codex
revdiff-planumputun/revdiff	Skill	958	2d ago	MIT	A	84	Claude Code
re0-mergeLilMGenius/paperthin	Skill	1.4k	yesterday	MIT	A	51	Claude Code, Codex
explore-unknownsdzhng/skills	Skill	1.5k	yesterday	MIT	A	162	Claude Code, Codex