code-review-checklist

A code review checklist for checking whether software works, is readable, safe, efficient, and maintainable before it ships.

In plain words
What is it for?
Use it to review frontend or backend changes, including error handling, database queries, API safety, responsive design, and keyboard access.
Why use it?
It helps reviewers catch common bugs, security risks, accessibility issues, and leftover debugging code before users encounter them.

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/subhansh-dev/agent-maxxing/code-review-checklist
Any agent
npx skills add subhansh-dev/agent-maxxing --skill code-review-checklist
Clone the repo
git clone --depth 1 https://github.com/subhansh-dev/agent-maxxing

Made for: Claude Code, Codex.

Per session 24 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 389 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 $0.00024 $0.00389
Opus 5 $0.00012 $0.00195
Sonnet 5 $0.00005 $0.00078
Haiku 4.5 $0.00002 $0.00039

Measured 2d ago against content hash 3589d8fbed50, 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-checklist 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.

engineering/code-review-checklist/SKILL.md · 68 lines

What it actually says

Code Review Checklist

Before shipping any code, run through this.

Does It Work?

  • Runs without errors
  • Handles the happy path
  • Handles edge cases (null, empty, 0, negative, very large)
  • Handles errors gracefully (try/catch, validation)
  • No console.logs or debug code left in

Is It Readable?

  • Variable names are descriptive (not x, temp, data2)
  • Functions do one thing
  • No magic numbers (use constants)
  • Comments explain "why", not "what"
  • Consistent style with existing codebase

Is It Safe?

  • No SQL injection / XSS / path traversal
  • No hardcoded credentials
  • No secrets in logs or error messages
  • Input validation on user-facing endpoints
  • Rate limiting on public APIs

Is It Performant?

  • No N+1 queries
  • No unnecessary re-renders (React)
  • No blocking operations on main thread
  • Lazy loading for heavy resources
  • Pagination for large datasets

Is It Maintainable?

  • No code duplication (DRY)
  • Clear separation of concerns
  • Error messages are helpful
  • Configuration is externalized
  • Dependencies are pinned

Frontend-Specific

  • Accessible (ARIA labels, keyboard nav, contrast)
  • Responsive (mobile, tablet, desktop)
  • Loading states for async operations
  • Error states with recovery paths
  • Empty states that guide the user
  • No layout shift (CLS)
  • 60fps animations (transform + opacity only)

Backend-Specific

  • Database migrations are reversible
  • API responses are consistent
  • Rate limiting is in place
  • Logging is sufficient for debugging
  • Health check endpoint exists
  • Graceful shutdown handling
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 · 68 lines · 24 tokens per session scan A 3589d8fbed50

Subscribe to this mod's changes

code-review-checklist is a skill published in the GitHub repository subhansh-dev/agent-maxxing (2 stars, last pushed 1mo ago), licensed MIT. It adds 24 tokens to every session and 389 once invoked, about $0.0001 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 2026-08-31.