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.
npx skills add skyfox675/agents-skills --skill doc-coauthoringgit clone --depth 1 https://github.com/skyfox675/agents-skillsWrote 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/skyfox675/agents-skills/doc-coauthoring)<a href="https://agentmods.dev/skills/skyfox675/agents-skills/doc-coauthoring"><img src="https://agentmods.dev/badge/skills/skyfox675/agents-skills/doc-coauthoring/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/skyfox675/agents-skills/doc-coauthoring"><img src="https://agentmods.dev/badge/skills/skyfox675/agents-skills/doc-coauthoring.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 | $0.00077 | $0.00384 |
| Opus 5 | $0.00039 | $0.00192 |
| Sonnet 5 | $0.00015 | $0.00077 |
| Haiku 4.5 | $0.00008 | $0.00038 |
Grade B, and why
doc-coauthoring scanned grade B with 1 finding 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 10d 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.
Enumerates other installed skillsmediumAgent snooping
Other skills' SKILL.md files reveal prompts, capabilities and secrets that should be invisible to peers.
- **Cursor / GitHub Copilot:** copy `skills/doc-coauthoring/` from anthropics/skills into your skills dir (`.cursor/skills/`, `.github/skills/`, or the shared `.claude/skills/`). What it actually says
doc-coauthoring (pointer skill)
Pointer skill — the implementation is not stored here. The name above is the stable local contract; the body lives upstream and is fetched/installed from source so consumers always get the latest version.
- Canonical source: https://github.com/anthropics/skills/blob/main/skills/doc-coauthoring/SKILL.md
- Raw SKILL.md: https://raw.githubusercontent.com/anthropics/skills/main/skills/doc-coauthoring/SKILL.md
- What it does: Three-stage collaborative document creation — gather context, refine section-by-section, test comprehension with a fresh-reader pass before publication.
- License: see the anthropics/skills repo LICENSE.
Installing this skill
- Claude Code (recommended):
/plugin marketplace add anthropics/skills, then/plugin install example-skills@anthropic-agent-skills— this skill ships in the example-skills plugin. - Claude.ai (paid plans): already available, no install.
- Claude API: upload/enable via the Skills API.
- Cursor / GitHub Copilot: copy
skills/doc-coauthoring/from anthropics/skills into your skills dir (.cursor/skills/,.github/skills/, or the shared.claude/skills/).
Do not copy the upstream body into this file; that would freeze the version and defeat the pointer.
What ships with it
1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
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.
- 10d ago First seen · 23 lines · 77 tokens per session scan B fd2bfa5740cc
doc-coauthoring is a skill published in the GitHub repository skyfox675/agents-skills (10 stars, last pushed 9d ago), licensed MIT. It adds 77 tokens to every session and 384 once invoked, about $0.0004 per session on Opus 5. A static security scan graded it B with 1 finding (enumerates other installed skills). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
Other skills, from other repositories
systematic-debugging
Use when encountering any bug, test failure, or unexpected behavior, before proposing fixes.
local-ai-agents
Build local-first AI agents that run entirely on a developer workstation with Microsoft Foundry Local and Qwen function-calling models. Covers Small Language Models (SLMs), the OpenAI-compatible local endpoint, sandboxed local tools, local RAG with Chroma, local MCP servers, hybrid cloud/local routing, and the…
next-cache-components-adoption
Turn on Cache Components in a Next.js app and resolve the blocking routes it surfaces. Use when the user wants to enable, adopt, or migrate to Cache Components, flip the cacheComponents flag, work through a flood of blocking-prerender / instant validation errors, run the cache-components-instant-false codemod, or…
insight-error-page
Write or audit an insight-kind error page for the Next.js dev overlay. Use when creating a new errors/ .mdx page, auditing an existing one, or checking that a page matches the framework fix cards. Covers page structure, title alignment, FixCard cards with Copy prompt button, code snippets, terminology verification…
next-cache-components-optimizer
Drive a Next.js route to instant navigation by setting up an agentic loop, under Cache Components / PPR, on initial load (hard navigation) and client-side navigation (soft navigation). Encode the goal as a failing @next/playwright instant() e2e and work it to green, one verified route at a time; the shipped test then…
next-partial-prefetching-adoption
Turn on Partial Prefetching in a Next.js app and work through the insights it surfaces. Use when the user wants to enable or adopt Partial Prefetching, flip the partialPrefetching flag, opt routes in with export const prefetch = 'partial', audit Link prefetch={true} behavior, preserve existing prefetched UI with…