code-review

code-review is a skill for Claude Code from cbrock84/headcount. It costs 72 tokens per session (472 once invoked), scanned A, original, MIT.

A method for reviewing code changes for correctness, design, security, data risks, tests, and possible effects elsewhere in the project.

In plain words
What is it for?
Use it to review a code diff or pull request, assess review feedback, or decide whether a suggested change is safe.
Why use it?
It helps catch serious bugs and unintended side effects before code is merged. It also keeps blocking problems separate from minor style preferences.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

Part of the technology plugin — 11 skills shipped together

About the project

headcount is an organization of independently installable Claude Code plugins, each grouping skills for a department such as finance, security, or demand generation. Claude Code users install the departments they need and invoke their skills for specialized work; the catalogue entries are skills and related agent tooling from that organization.

cbrock84/headcount · 1,247 stars · on GitHub · cbrock84.github.io

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/cbrock84/headcount/code-review
Any agent
npx skills add cbrock84/headcount --skill code-review
Clone the repo
git clone --depth 1 https://github.com/cbrock84/headcount

Made for: Claude Code.

Or install technology, the plugin that ships this one along with the rest of its 11 skills.

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/cbrock84/headcount/code-review.svg)](https://agentmods.dev/skills/cbrock84/headcount/code-review)
Your own site
<a href="https://agentmods.dev/skills/cbrock84/headcount/code-review"><img src="https://agentmods.dev/badge/skills/cbrock84/headcount/code-review.svg" alt="Measured on agentmods" height="20"></a>
Per session 72 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 472 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 5.1 $0.00072 $0.00472
Opus 5 $0.00036 $0.00236
Sonnet 5 $0.00014 $0.00094
Haiku 4.5 $0.00007 $0.00047

Measured 2d ago against content hash 539e1580e339, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, 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 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.

plugins/technology/skills/code-review/SKILL.md · 43 lines

What it actually says

Code review

Two directions, one skill: reviewing, and being reviewed.

Reviewing

Read the diff against what the change is for, not against your preferences. Order matters — spend attention where damage is expensive:

  1. Correctness — does it do what it claims, including at the boundaries and on the error path?
  2. Blast radius — what else consumes this? Signature and schema changes are the ones that break things far away.
  3. Security and data — untrusted input, authorization, anything logged or persisted.
  4. Tests — do they pin the new behavior, or do they pass regardless?
  5. Design — will this shape hold under the next change?
  6. Style — last, and only where a linter cannot.

Say which category each comment is, and whether it blocks. A review that mixes a data-loss bug with a naming preference in one undifferentiated list wastes the author's judgment.

Receiving

Feedback is a report of a reader's experience, and that part is always valid — if the reviewer misread it, the code is misleading. The proposed remedy is a separate thing and may be wrong.

  • Verify before implementing. A suggestion that would break behavior gets a reply, not a commit.
  • Disagreeing is fine; ignoring is not. Answer every comment: changed, or why not.
  • Do not batch-accept. Applying every suggestion without judgment is how good code becomes incoherent.
  • Where a reviewer is factually wrong, show the evidence — the test, the spec, the failing case — rather than asserting.

Never

  • Approve your own work, or a change you authored under another name.
  • Leave a blocking comment without saying what would unblock it.
  • Rewrite the author's approach in a review comment. Propose it, and let them decide.
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 · 43 lines · 72 tokens per session scan A 539e1580e339

Subscribe to this mod's changes

code-review is a skill published in the GitHub repository cbrock84/headcount (1,247 stars, last pushed 2d ago), licensed MIT. It adds 72 tokens to every session and 472 once invoked, about $0.0004 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 2026-09-03.

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