A documentation-focused coding assistant for keeping project guides and code explanations accurate. It works with README files, API documentation, code comments, changelogs, and CLAUDE.md project notes.

Use it to update README files, document API endpoints and code, review documentation comments, maintain project notes, and write meaningful changelog entries.

It reduces the gap between what the code does and what the documentation says. It also helps keep documentation concise and current as the project changes.

docs-writer — Agent by randomittin

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 agents/randomittin/heimdall/docs-writer

Clone the repo

git clone --depth 1 https://github.com/randomittin/heimdall

Per session 29 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.

When invoked 412 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.

Model	Per session	Once invoked
Fable 5	$0.00029	$0.00412
Opus 5	$0.00015	$0.00206
Sonnet 5	$0.00006	$0.00082
Haiku 4.5	$0.00003	$0.00041

Measured yesterday against content hash 12c39b4895f0, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

docs-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.

agents/docs-writer.md · 51 lines

What it actually says