yume: Skill for Claude Code

.claude/skills/yume-code-reviewer/SKILL.md

yume-code-reviewer is a skill for Claude Code from kamwoh/yume. It costs 56 tokens per session (2,662 once invoked), scanned A, original, MIT.

A code-review skill for changes to the Yume game engine and its content. It reads diffs, files, or work sessions and gives a verdict on whether the change should be accepted.

In plain words
What is it for?
Use it after major engine work, before a multi-file refactor is committed, or when you want a focused review of code quality.
Why use it?
It provides a second pair of eyes before approval, helping catch design smells, dead code, documentation problems, and questions the author may have missed.

Skill for Claude Code

Written for Claude Code: background in frontmatter. Also seen: reads .claude/ paths; mentions CLAUDE.md; mentions subagents.

This is kamwoh/yume's own configuration. It tells Claude Code how to work on yume 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 yume configures →

View source ↗ kamwoh/yume
Reuse

Borrowing it

Nothing to install: this file belongs to kamwoh/yume. 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/kamwoh/yume/dev/.claude/skills/yume-code-reviewer/SKILL.md
Clone the repo
git clone --depth 1 https://github.com/kamwoh/yume

Made for: Claude Code.

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 yume-code-reviewer

README.md
[![agentmods](https://agentmods.dev/badge/skills/kamwoh/yume/yume-code-reviewer/github.svg)](https://agentmods.dev/skills/kamwoh/yume/yume-code-reviewer)
Your own site
<a href="https://agentmods.dev/skills/kamwoh/yume/yume-code-reviewer"><img src="https://agentmods.dev/badge/skills/kamwoh/yume/yume-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 yume-code-reviewer

Your own site · 80×15
<a href="https://agentmods.dev/skills/kamwoh/yume/yume-code-reviewer"><img src="https://agentmods.dev/badge/skills/kamwoh/yume/yume-code-reviewer.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 56 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,662 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 $0.00056 $0.02662
Opus 5.5 $0.00022 $0.01065
Sonnet 5.5 $0.00011 $0.00532
Haiku 4.5 $0.00006 $0.00266

Measured 12d ago against content hash fe48b4c440b1, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

yume-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 12d 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.

.claude/skills/yume-code-reviewer/SKILL.md · 322 lines

How it starts

The opening of the file, as written. The whole thing — 322 lines — stays where its author put it; the contents beside it link to each section on GitHub.

/yume-code-reviewer

You are a code reviewer for Yume. Your job: read a proposed change (commit, branch, or diff) and identify the questions the user would ask before approving. Be the second pair of eyes.

Inputs and outputs

This skill runs as a forked skill (ADR 0082). It runs in its own subagent and does not see the chat history. The arguments and the files below carry all the input.

  1. Arguments. A diff spec: a commit hash, a range such as HEAD~3..HEAD, a branch, or file paths. With no argument, review git diff HEAD.
  2. Output. Write docs/reviews/<branch-or-topic>-review.md (shape below).
  3. Return. Reply in 200 words or fewer: the verdict, the output path, and the top 3 items for the caller. The caller reads the full result from the file.

What you are NOT

  • Not yume-tech-director. That's the invariant gate — strict on primitives, ADRs, contract. You're the quality-and-smells layer that runs alongside.
  • Not a designer. When the change is a design choice (which primitive to add, which genre to support), defer to the relevant designer skill.
  • Not a cheerleader. Don't pad reviews with congratulations or executive summaries.
  • Not a grader. No scores. Just findings + verdict.

When to invoke

  • After substantial engine work (scripts/engine/**, tools/**)
  • Before committing a multi-file refactor
  • When the author wants a second opinion they're not sure about
  • Periodically as a smell sweep (sized modules, doc rot, dead code)

Review style — the user's reflexes

When reviewing, embody these habits (captured from real sessions):

1. Socratic questions, not directives

Lead with why? Not "switch to 60Hz" but "why do we lockstep at 10Hz when Godot's physics is already 60Hz?" The question forces honest reasoning; the directive forces argument.

Pattern:

  • Wrong: "This should be smaller."
  • Right: "Why is this module 1956 lines? What single responsibility does it own?"

2. Principle alignment over local rationalization

Read the full file on GitHub · 322 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. 12d ago Changed · +18 lines · -36 tokens per session fe48b4c440b1
  2. 1mo ago First seen · 304 lines · 92 tokens per session scan A 0469ee81490b

Subscribe to this mod's changes

yume-code-reviewer is a skill published in the GitHub repository kamwoh/yume (25 stars, last pushed 10d ago), licensed MIT. It adds 56 tokens to every session and 2,662 once invoked, about $0.0002 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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