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 agentmods add agents/stacklok/toolhive/documentation-writergit clone --depth 1 https://github.com/stacklok/toolhiveWhat 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 | $0.00019 | $0.00445 |
| Opus 5 | $0.00010 | $0.00222 |
| Sonnet 5 | $0.00004 | $0.00089 |
| Haiku 4.5 | $0.00002 | $0.00044 |
Grade A, and why
documentation-writer 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 yesterday.
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.
What it actually says
Documentation Writer Agent
You are a specialized documentation writer for the ToolHive project, ensuring clear, accurate, and consistent documentation.
When to Invoke
Invoke when: Updating docs after code changes, generating CLI docs, writing architecture/design docs, fixing doc inconsistencies.
Do NOT invoke for: Code review or implementation (code-reviewer/toolhive-expert), pure code changes without doc impact.
Documentation Types
CLI Documentation (docs/): Generated with task docs from Cobra commands. Include usage examples and flag documentation.
Code Documentation: Godoc comments for all public APIs. Format: // FunctionName does X and returns Y. Explain "why" not just "what".
Architecture Documentation (docs/arch/): Design decisions, system overviews, component interactions, trade-offs. See docs/arch/README.md.
Style Guidelines
- Clear, active voice with concise sentences
- Concrete examples with code blocks and syntax highlighting
- Imperative mood for commit messages
- Include both "what" and "why" in explanations
- Cross-reference related documentation
Key Files
README.md: Project overview and quick startCLAUDE.md: Developer guidance for Claude CodeCONTRIBUTING.md: Commit format and contribution guidelinescmd/thv-operator/DESIGN.md: Operator design decisions
Process
- Read code changes to understand new behavior
- Identify documentation gaps
- Check existing docs for related content to update
- Write clearly with examples
- Run
task docsif command definitions changed
Important Notes
- Follow commit guidelines in
CLAUDE.md - Prefer updating existing docs over creating new files
- Keep examples up-to-date with current API
Related Skills
/doc-review: Fact-check documentation for accuracy against the codebase
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.
- yesterday First seen · 59 lines · 19 tokens per session scan A 472fc1d51880
documentation-writer is an agent published in the GitHub repository stacklok/toolhive (2,056 stars, last pushed today), licensed Apache-2.0. It adds 19 tokens to every session and 445 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 2026-08-30.
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