developer-documenter

developer-documenter is a skill for Claude Code, Codex from lfyxhappy/lfcode. It costs 69 tokens per session (312 once invoked), scanned A, original, MIT.

A workflow for writing and maintaining documentation that developers use to run, change, or recover a project. It bases instructions on the implemented behavior, project conventions, and available validation.

In plain words
What is it for?
Use it for README files, architecture notes, runbooks, API guides, contribution instructions, migration guides, and troubleshooting material. It helps organize prerequisites, commands, failures, recovery, and ownership.
Why use it?
Documentation can become misleading when commands, paths, configuration, or guarantees no longer match the software. This workflow checks examples and links without inventing unsupported details.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit Use it for README files, architecture notes, runbooks, API guides, contribution instructions, migration guides, and troubleshooting material. It helps organize prerequisites, commands, failures, recovery, and ownership.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/lfyxhappy/lfcode/developer-documenter
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.

Any agent
npx skills add lfyxhappy/lfcode --skill developer-documenter
Clone the repo
git clone --depth 1 https://github.com/lfyxhappy/lfcode

Made for: Claude Code, Codex.

Wrote 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.

agentmods badge for developer-documenter

README.md
[![agentmods](https://agentmods.dev/badge/skills/lfyxhappy/lfcode/developer-documenter/github.svg)](https://agentmods.dev/skills/lfyxhappy/lfcode/developer-documenter)
Your own site
<a href="https://agentmods.dev/skills/lfyxhappy/lfcode/developer-documenter"><img src="https://agentmods.dev/badge/skills/lfyxhappy/lfcode/developer-documenter/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.

agentmods 80×15 button for developer-documenter

Your own site · 80×15
<a href="https://agentmods.dev/skills/lfyxhappy/lfcode/developer-documenter"><img src="https://agentmods.dev/badge/skills/lfyxhappy/lfcode/developer-documenter.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 69 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 312 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
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 5.1 $0.00069 $0.00312
Opus 5.5 $0.00028 $0.00125
Sonnet 5.5 $0.00014 $0.00062
Haiku 4.5 $0.00007 $0.00031

Measured 1mo ago against content hash dc23f7d45bd2, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

developer-documenter 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 1mo 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.

packages/lfcode/src/skill/lfcode/.bundle/developer-documenter/SKILL.md · 27 lines

What it actually says

Developer Documenter

Document the operational truth of a project so another developer can use, change, and recover it.

Workflow

  1. Identify the documentation audience, task, repository convention, source of truth, and current user journey.
  2. Inspect implementation, scripts, configuration, generated artifacts, tests, and runtime behavior before documenting commands or guarantees.
  3. Organize content around prerequisites, outcomes, commands, interfaces, failures, recovery, and ownership. Keep stable facts separate from examples and environment-specific values.
  4. Update only the documentation necessary for the requested behavior; retain existing terminology and avoid duplicating a more authoritative source.
  5. Validate command examples, paths, links, code snippets, generated output, and rendered documents where practical.

Boundaries

  • Do not invent features, configuration values, release steps, performance claims, or security guarantees.
  • Do not include secrets, tokens, customer data, internal-only endpoints, or personal paths in user-facing documentation.
  • Do not rewrite unrelated documentation or change product behavior merely to make documentation simpler.

Completion Check

Report documentation changed, evidence checked, commands or links validated, and material behavior that remains undocumented or unverified.

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. 1mo ago First seen · 27 lines · 69 tokens per session scan A dc23f7d45bd2

Subscribe to this mod's changes

developer-documenter is a skill published in the GitHub repository lfyxhappy/lfcode (2 stars, last pushed 26d ago), licensed MIT. It adds 69 tokens to every session and 312 once invoked, about $0.0003 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 2026-09-05.