update-documentation

update-documentation is a skill for Claude Code, Codex, Cursor from andvolodko/html5-game-editor. It costs 54 tokens per session (1,155 once invoked), scanned A, original, MIT.

A repository documentation guide for keeping the README, project guide, topic pages, shortcuts, and feature tables accurate. It treats the implementation as the source of truth.

In plain words
What is it for?
Use it after shipping a feature, changing an architecture or package boundary, or altering a command, shortcut, asset type, node type, or setup instruction.
Why use it?
It prevents documentation from describing behavior, commands, files, or features that no longer exist or leaves new user-visible changes undocumented.

Skill for Claude CodeCodexCursor

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/andvolodko/html5-game-editor/update-documentation
Any agent
npx skills add andvolodko/html5-game-editor --skill update-documentation
Clone the repo
git clone --depth 1 https://github.com/andvolodko/html5-game-editor

Made for: Claude Code, Codex, Cursor.

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 update-documentation

README.md
[![agentmods](https://agentmods.dev/badge/skills/andvolodko/html5-game-editor/update-documentation.svg)](https://agentmods.dev/skills/andvolodko/html5-game-editor/update-documentation)
Your own site
<a href="https://agentmods.dev/skills/andvolodko/html5-game-editor/update-documentation"><img src="https://agentmods.dev/badge/skills/andvolodko/html5-game-editor/update-documentation.svg" alt="Measured on agentmods" height="20"></a>
Per session 54 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,155 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 $0.00054 $0.01155
Opus 5 $0.00027 $0.00577
Sonnet 5 $0.00011 $0.00231
Haiku 4.5 $0.00005 $0.00115

Measured 5d ago against content hash eb3cfd0a8a3d, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-05, from the pricing page.

Security

Grade A, and why

update-documentation 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 5d 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.

.cursor/skills/update-documentation/SKILL.md · 98 lines

How it starts

The opening of the file, as written. The whole thing — 98 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Update Documentation

Keep human docs aligned with code. Code wins when they disagree.

Do not update roadmap/history sections merely to produce documentation churn.

Only update documentation that becomes incorrect or incomplete because of the implementation.

When to use this skill

  • A shipped behavior, format, command, hotkey, panel, asset kind, node type, or package boundary changed.
  • PROJECT.md / docs/README.md “start here” tables would send readers to the wrong file.
  • README feature table or layout/port list would omit a new game or capability.

Do not use this to:

  • Rewrite docs/roadmap.md or README “Suggested next work” because a task was completed unless that line is now false.
  • Add new topic pages for localized Inspector/UI tweaks.
  • Duplicate .cursor/rules/*.mdc into docs/.

Before changing code (or finishing a feature)

  1. Diff the implementation against the docs in the table below — do not load every file.
  2. Treat these as authoritative:
Kind File
Operator setup, ports, games list, feature table README.md
Invariants, packages, which topic to open PROJECT.md
Developer “I want to…” index docs/README.md
Scene JSON / components / prefabs docs/scene-model.md
Script components how-to docs/guides/add-a-script-component.md
Assets / generated files docs/assets.md
Aseprite CLI docs/aseprite.md
Editor façade, commands, panels docs/editor.md
Shortcuts docs/hotkeys.md
Runtime / independent games docs/runtime.md
Pixi/Three adapters, node-type table docs/renderers.md
HTTP / path confinement docs/project-server.md
Package boundaries, performance docs/architecture.md
Collaboration (design only today) docs/collaboration.md — do not describe it as shipped
Phases / remaining work docs/roadmap.md
Screenshots docs/screenshots/

Cursor workflows live in .cursor/skills/ (this tree). Persistent constraints live in .cursor/rules/. Do not copy a skill into docs/ unless a human how-to is missing (docs/guides/add-a-script-component.md already pairs with create-game-component).

Read the full file on GitHub · 98 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. 5d ago First seen · 98 lines · 54 tokens per session scan A eb3cfd0a8a3d

Subscribe to this mod's changes

update-documentation is a skill published in the GitHub repository andvolodko/html5-game-editor (6 stars, last pushed 11d ago), licensed MIT. It adds 54 tokens to every session and 1,155 once invoked, about $0.0003 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.

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