rulesmith: Skill for Claude Code

.agents/skills/code-reviewer/SKILL.md

code-reviewer is a skill for Claude Code, Codex from CsabaKovacs/rulesmith. It costs 29 tokens per session (602 once invoked), scanned A, original, Apache-2.0.

A code-review checklist that examines changed files after code edits for quality, consistency, readability, and compatibility.

In plain words
What is it for?
Use it after changes to application logic, architecture, data flow, or reusable components. It can classify findings by urgency and stay silent when no issues are found.
Why use it?
It helps catch unnecessary complexity, duplicated code, naming problems, broken interfaces, and violations of project rules before they spread.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one. Also seen: installed under .agents/ (shared by several agents).

This is CsabaKovacs/rulesmith's own configuration. It tells Claude Code and Codex how to work on rulesmith itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything rulesmith configures →

Reuse

Borrowing it

Nothing to install: this file belongs to CsabaKovacs/rulesmith. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/CsabaKovacs/rulesmith/main/.agents/skills/code-reviewer/SKILL.md
Clone the repo
git clone --depth 1 https://github.com/CsabaKovacs/rulesmith

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-reviewer

README.md
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Your own site
<a href="https://agentmods.dev/skills/csabakovacs/rulesmith/code-reviewer"><img src="https://agentmods.dev/badge/skills/csabakovacs/rulesmith/code-reviewer/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.

agentmods 80×15 button for code-reviewer

Your own site · 80×15
<a href="https://agentmods.dev/skills/csabakovacs/rulesmith/code-reviewer"><img src="https://agentmods.dev/badge/skills/csabakovacs/rulesmith/code-reviewer.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 29 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 602 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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00029 $0.00602
Opus 5.5 $0.00012 $0.00241
Sonnet 5.5 $0.00006 $0.00120
Haiku 4.5 $0.00003 $0.00060

Measured 1mo ago against content hash a9ab4dccb879, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, 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 1mo 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.

.agents/skills/code-reviewer/SKILL.md · 72 lines

How it starts

The opening of the file, as written. The whole thing — 72 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Code Quality Review

Reviews changed files for code quality, convention adherence, and maintainability.

When to Activate

  • After ANY code modification that affects application logic, architecture, data flow, or reusable components.
  • Skip ONLY for documentation-only, config-only, or trivial text changes.

Review Methodology

Follow these steps in order:

  • Identify all changed files and understand the scope of the modification.
  • Check adherence to project conventions defined in the rulebook.
  • Evaluate naming consistency, readability, and pattern conformance.
  • Flag unnecessary complexity, duplication, or DRY violations.
  • Verify that changes maintain existing contracts and do not break interfaces.
  • Classify findings as critical (must fix), important (should fix), or minor (consider fixing).
  • Report ONLY when issues are found — produce no output if the review passes clean.

Stack-Specific Rules

  • Enforce strict TypeScript: flag any types, missing return types on exported functions.
  • Verify .js extensions in import paths (NodeNext). (evidence: packages/core/src/index.ts)
  • Check Zod schemas at boundaries. (evidence: packages/core/src/profile/schema.ts)
  • Verify barrel exports. (evidence: packages/core/src/index.ts)
  • Check file I/O through safe.ts. (evidence: packages/core/src/fs/safe.ts)
  • Module-level functions, no class wrappers. (evidence: packages/core/src/scanner/index.ts)

Project Conventions to Enforce

Architecture

  • 3-package monorepo: core, cli, mcp. New features: core → barrel → CLI + MCP. (evidence: pnpm-workspace.yaml)
  • Templates in packs/default/templates/. examples/fixtures/ is test data. (evidence: packs/default/)

Code Style

  • Constants: UPPER_SNAKE_CASE. Functions: camelCase. Types: PascalCase.
  • Record<string, unknown> for JSON, never any. Private helpers unexported.

Execution Guardrails

  • Forbidden paths: .git, node_modules, dist/, vendor/.

Boundaries

  • Do NOT automatically apply fixes — report findings for the orchestrator to handle.
  • Do NOT review test files unless the change specifically targets test infrastructure.
  • Ignore purely stylistic suggestions unless they meaningfully impact maintainability.

Read the full file on GitHub · 72 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. 1mo ago First seen · 72 lines · 29 tokens per session scan A a9ab4dccb879

Subscribe to this mod's changes

code-reviewer is a skill published in the GitHub repository CsabaKovacs/rulesmith (15 stars, last pushed 6mo ago), licensed Apache-2.0. It adds 29 tokens to every session and 602 once invoked, about $0.0001 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.

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