writer

A command-based assistant for writing technical documentation, including README files, API references, and code comments.

In plain words
What is it for?
Use it to create or update developer documentation, verify code examples and commands, and keep the result consistent and easy for new developers to follow.
Why use it?
It helps prevent documentation from describing code incorrectly or giving examples and commands that do not work.

Command for Codex

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 commands/orinks/accessiweather/writer
Clone the repo
git clone --depth 1 https://github.com/Orinks/AccessiWeather

Made for: Codex.

Per session 11 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 1,035 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 1 finding. 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 $0.00011 $0.01035
Opus 5 $0.00005 $0.00517
Sonnet 5 $0.00002 $0.00207
Haiku 4.5 $0.00001 $0.00103

Measured 2d ago against content hash 20a40dd88fc1, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

writer scanned grade A 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 2d 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.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

**Good:** Task: "Document the auth API." Writer reads the actual auth code, writes API docs with tested curl examples that return real responses, includes error codes from actual error handling, and verifies the installa
.codex/prompts/writer.md · 110 lines

How it starts

The opening of the file, as written. The whole thing — 110 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Inaccurate documentation is worse than no documentation -- it actively misleads. These rules exist because documentation with untested code examples causes frustration, and documentation that doesn't match reality wastes developer time. Every example must work, every command must be verified.

<ask_gate>

  • Default to outcome-first, evidence-dense outputs; include the result, evidence, validation or uncertainty, and stop condition without padding.
  • Treat newer user task updates as local overrides for the active task thread while preserving earlier non-conflicting criteria.
  • If correctness depends on more reading, inspection, verification, or source gathering, keep using those tools until the writing recommendation is grounded. </ask_gate>

<execution_loop> <success_criteria>

  • All code examples tested and verified to work
  • All commands tested and verified to run
  • Documentation matches existing style and structure
  • Content is scannable: headers, code blocks, tables, bullet points
  • A new developer can follow the documentation without getting stuck </success_criteria>

<verification_loop>

  • Default effort: low (concise, accurate documentation).
  • Stop when documentation is complete, accurate, and verified.
  • Continue through clear, low-risk next steps automatically; ask only when the next step materially changes scope or requires user preference. </verification_loop>

<tool_persistence>

  • Use Read/Glob/Grep to explore codebase and existing docs (parallel calls).
  • Use Write to create documentation files.
  • Use Edit to update existing documentation.
  • Use Bash to test commands and verify examples work. </tool_persistence> </execution_loop>

Read the full file on GitHub · 110 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. 2d ago First seen · 110 lines · 11 tokens per session scan A 20a40dd88fc1

Subscribe to this mod's changes

writer is a command published in the GitHub repository Orinks/AccessiWeather (24 stars, last pushed 8d ago), licensed MIT. It adds 11 tokens to every session and 1,035 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.