Borrowing it
Nothing to install: this file belongs to vchelaru/FlatRedBall2. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/vchelaru/FlatRedBall2/main/.claude/skills/docs-writing/SKILL.mdgit clone --depth 1 https://github.com/vchelaru/FlatRedBall2Wrote 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.
[](https://agentmods.dev/skills/vchelaru/flatredball2/docs-writing)<a href="https://agentmods.dev/skills/vchelaru/flatredball2/docs-writing"><img src="https://agentmods.dev/badge/skills/vchelaru/flatredball2/docs-writing/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.
<a href="https://agentmods.dev/skills/vchelaru/flatredball2/docs-writing"><img src="https://agentmods.dev/badge/skills/vchelaru/flatredball2/docs-writing.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00050 | $0.00720 |
| Opus 5.5 | $0.00020 | $0.00288 |
| Sonnet 5.5 | $0.00010 | $0.00144 |
| Haiku 4.5 | $0.00005 | $0.00072 |
Grade A, and why
docs-writing 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 16d 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.
How it starts
The opening of the file, as written. The whole thing — 34 lines — stays where its author put it; the contents beside it link to each section on GitHub.
FlatRedBall2 Docs Writing Reference
FlatRedBall2's user docs live in this repo's own docs/ folder — not the sibling FlatRedBallDocs repo (that's classic FlatRedBall's Glue/Editor-based docs, a different product), and not .claude/skills/ (AI-facing, not user-facing). docs/ is already connected to a live GitBook space — its git history has GitBook:/GITBOOK-1 sync commits, so a push to main publishes.
Where FlatRedBall2 Docs Live
- Nav:
docs/SUMMARY.md, grouped under##section headings with nested bullets. A page not listed there is unreachable even if it exists on disk. - AnimationEditor tool docs (the desktop app's UI) live in
docs/animationeditor/anddocs/animationeditor/how-to/. Code docs (loading the file format in a game) live indocs/animationeditor/api/under the Code entry. Keep the two kinds apart, as Gum does (Gum/.claude/skills/gum-docs-writing/SKILL.md, "Tool Docs vs Code Docs"). - Images live in
docs/.gitbook/assets/, referenced relatively (../.gitbook/assets/foo.png).
Match the Style Already In Use
Images use GitBook's <figure><img src="..." alt="..."><figcaption></figcaption></figure> block, as in docs/animationeditor/quick-start.md. No page uses {% hint %} or {% tabs %}; don't introduce them unless the user asks. Heading levels nest normally (# → ## → ###, no skipped levels). Procedures follow quick-start.md: bold UI element names, one action per step.
No Claudese
Cut these when writing or reviewing docs prose:
- Em-dash restatement — "X, not Y" or "X — the Y version" says the same thing twice. State it once.
- "It's not X, it's Y" framing — say what it is, don't set up and knock down a strawman.
- Hedge/filler transitions — "essentially," "in other words," "that said" — cut them, the next sentence works alone.
Imperative vs. Descriptive: Match the Sentence to the Job
Two different jobs want two different moods, and mixing them up produces docs that either bury the actual click-through steps or bark commands where an explanation was needed:
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.
- 16d ago Changed · +50 tokens per session 7010d65ec59f
- 18d ago Changed a1239cd274e5
- 26d ago Changed 8c115753c05a
- 1mo ago First seen · 34 lines · 0 tokens per session scan A bc8b6c77519a
docs-writing is a skill published in the GitHub repository vchelaru/FlatRedBall2 (15 stars, last pushed today), licensed MIT. It adds 50 tokens to every session and 720 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 2026-09-08.
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