code-reviewer

A code-reviewing guide for examining either your local file changes or a remote GitHub Pull Request, which is a proposed code change shared for review. It checks the code for correctness, maintainability, and project rules.

In plain words
What is it for?
Use it to review staged or unstaged changes, or a GitHub Pull Request identified by number or URL. It can also run the project's verification checks before the review.
Why use it?
It helps find problems and unclear code before changes are merged or shared with others. It also gives the review a consistent process for local work and Pull Requests.

Skill for Claude CodeCodexGemini CLI

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/itallstartedwithaidea/gemini-cli-googleadsagent/code-reviewer
Any agent
npx skills add itallstartedwithaidea/gemini-cli-googleadsagent --skill code-reviewer
Clone the repo
git clone --depth 1 https://github.com/itallstartedwithaidea/gemini-cli-googleadsagent

Made for: Claude Code, Codex, Gemini CLI.

Per session 47 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 723 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin 100% copy Near-identical to another mod 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 $0.00047 $0.00723
Opus 5 $0.00023 $0.00362
Sonnet 5 $0.00009 $0.00145
Haiku 4.5 $0.00005 $0.00072

Measured 2d ago against content hash d2bd763e7cfa, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

code-reviewer 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.

Origin

This is a copy

100% identical to code-reviewer — 0 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

.gemini/skills/code-reviewer/SKILL.md · 66 lines

How it starts

The opening of the file, as written. The whole thing — 66 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Code Reviewer

This skill guides the agent in conducting professional and thorough code reviews for both local development and remote Pull Requests.

Workflow

1. Determine Review Target

  • Remote PR: If the user provides a PR number or URL (e.g., "Review PR #123"), target that remote PR.
  • Local Changes: If no specific PR is mentioned, or if the user asks to "review my changes", target the current local file system states (staged and unstaged changes).

2. Preparation

For Remote PRs:
  1. Checkout: Use the GitHub CLI to checkout the PR.
    gh pr checkout <PR_NUMBER>
    
  2. Preflight: Execute the project's standard verification suite to catch automated failures early.
    npm run preflight
    
  3. Context: Read the PR description and any existing comments to understand the goal and history.
For Local Changes:
  1. Identify Changes:
    • Check status: git status
    • Read diffs: git diff (working tree) and/or git diff --staged (staged).
  2. Preflight (Optional): If the changes are substantial, ask the user if they want to run npm run preflight before reviewing.

3. In-Depth Analysis

Analyze the code changes based on the following pillars:

  • Correctness: Does the code achieve its stated purpose without bugs or logical errors?
  • Maintainability: Is the code clean, well-structured, and easy to understand and modify in the future? Consider factors like code clarity, modularity, and adherence to established design patterns.
  • Readability: Is the code well-commented (where necessary) and consistently formatted according to our project's coding style guidelines?
  • Efficiency: Are there any obvious performance bottlenecks or resource inefficiencies introduced by the changes?
  • Security: Are there any potential security vulnerabilities or insecure coding practices?
  • Edge Cases and Error Handling: Does the code appropriately handle edge cases and potential errors?
  • Testability: Is the new or modified code adequately covered by tests (even if preflight checks pass)? Suggest additional test cases that would improve coverage or robustness.

Read the full file on GitHub · 66 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.

  1. 2d ago First seen · 66 lines · 47 tokens per session scan A d2bd763e7cfa

Subscribe to this mod's changes

code-reviewer is a skill published in the GitHub repository itallstartedwithaidea/gemini-cli-googleadsagent (5 stars, last pushed 3mo ago), licensed Apache-2.0. It adds 47 tokens to every session and 723 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 0 findings. It is 100% identical to code-reviewer, differing in 0 lines, and is treated as a copy.

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