code-review

code-review is a skill for Claude Code, Codex from Threat-Vector-Security/guardian-agent. It costs 35 tokens per session (715 once invoked), scanned A, original, Apache-2.0.

A code-review guide for examining a diff, pull request, or patch before it is merged. A diff is the exact list of changes between two versions of code.

In plain words
What is it for?
Checking correctness, readability, architecture, security, performance, testing evidence, and the severity of review findings.
Why use it?
It helps find bugs, regressions, security or design risks, missing tests, and changes that are difficult to review.

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/threat-vector-security/guardian-agent/code-review
Any agent
npx skills add Threat-Vector-Security/guardian-agent --skill code-review
Clone the repo
git clone --depth 1 https://github.com/Threat-Vector-Security/guardian-agent

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.

agentmods badge for code-review

README.md
[![agentmods](https://agentmods.dev/badge/skills/threat-vector-security/guardian-agent/code-review.svg)](https://agentmods.dev/skills/threat-vector-security/guardian-agent/code-review)
Your own site
<a href="https://agentmods.dev/skills/threat-vector-security/guardian-agent/code-review"><img src="https://agentmods.dev/badge/skills/threat-vector-security/guardian-agent/code-review.svg" alt="Measured on agentmods" height="20"></a>
Per session 35 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 715 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 $0.00035 $0.00715
Opus 5 $0.00017 $0.00358
Sonnet 5 $0.00007 $0.00143
Haiku 4.5 $0.00003 $0.00072

Measured 3d ago against content hash a649b1ed672f, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

code-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 3d 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/code-review/SKILL.md · 68 lines

How it starts

The opening of the file, as written. The whole thing — 68 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Code Review

Review changes against correctness, readability, architecture, security, performance, and verification quality. A review is not a style pass and it is not approval theater.

Process

  1. Understand the intent before judging the diff.
    • What behavior is changing?
    • What plan, task, or acceptance gate is this supposed to satisfy?
  2. Read the proof surface first.
    • Check tests, harnesses, build claims, and any other evidence before trusting the implementation story.
  3. Review the implementation across five axes:
    • correctness and regressions
    • readability and simplicity
    • architecture and boundary fit
    • security and trust-boundary handling
    • performance and scalability risk
  4. Anchor findings to the real change.
    • Use code_git_diff to review the actual diff.
    • Use code_symbol_search or targeted file reads to confirm surrounding behavior before concluding.
  5. Label the finding severity so the author knows what is required.
    • Critical: blocks merge
    • no prefix means required change
    • Optional: or Consider: means worthwhile but not required
    • FYI: is informational only
  6. Call out reviewability problems too.
    • If the change is too large, mixed, or weakly verified, say so directly.
    • Treat weakened tests, narrowed proof surfaces, and dead-code leftovers as real findings.

Output structure:

  • Findings with file paths and concrete risk.
  • Open questions or assumptions.
  • Brief summary only after the findings list.

Review Axes

  • Correctness: behavior, edge cases, state transitions, and regression risk
  • Readability: control flow, naming, avoidable complexity, and premature abstraction
  • Architecture: module boundaries, consistency with existing patterns, and coupling
  • Security: input validation, authz/authn, trust boundaries, secrets, and external data handling
  • Performance: N+1 patterns, unbounded work, avoidable sync paths, and hot-path allocations

Reviewability Rules

  • Prefer small, coherent changes. If the diff is too large to review safely, call that out instead of pretending confidence.
  • Separate refactors from behavior changes when the diff mixes both.
  • Review tests as the proof of intent, not as an afterthought.
  • If refactoring leaves likely orphaned code behind, list it explicitly and ask before deleting uncertain leftovers.

Read the full file on GitHub · 68 lines

Files

What ships with it

3 files 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. 3d ago First seen · 68 lines · 35 tokens per session scan A a649b1ed672f

Subscribe to this mod's changes

code-review is a skill published in the GitHub repository Threat-Vector-Security/guardian-agent (11 stars, last pushed 2mo ago), licensed Apache-2.0. It adds 35 tokens to every session and 715 once invoked, about $0.0002 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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