tech-writer

tech-writer is a skill for Claude Code from christiangalsterer/documentation-plugin. It costs 116 tokens per session (1,301 once invoked), scanned A, original, MIT.

A technical-documentation writing workflow that produces one structured Markdown document for a specified audience and goal. Markdown is plain text with formatting conventions for headings, lists, links, and code examples.

In plain words
What is it for?
Use it to write or revise READMEs, guides, and technical documentation in a fixed structure, with examples for documented features and settings.
Why use it?
It reduces inconsistent documentation and helps ensure that commands, options, prerequisites, troubleshooting, and next steps are based on verified project facts.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

Part of the documentation-plugin plugin — 3 skills, 1 agent shipped together

Good fit Use it to write or revise READMEs, guides, and technical documentation in a fixed structure, with examples for documented features and settings.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/christiangalsterer/documentation-plugin/tech-writer
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 christiangalsterer/documentation-plugin --skill tech-writer
Clone the repo
git clone --depth 1 https://github.com/christiangalsterer/documentation-plugin

Made for: Claude Code.

Or install documentation-plugin, the plugin that ships this one along with the rest of its 3 skills, 1 agent.

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 tech-writer

README.md
[![agentmods](https://agentmods.dev/badge/skills/christiangalsterer/documentation-plugin/tech-writer/github.svg)](https://agentmods.dev/skills/christiangalsterer/documentation-plugin/tech-writer)
Your own site
<a href="https://agentmods.dev/skills/christiangalsterer/documentation-plugin/tech-writer"><img src="https://agentmods.dev/badge/skills/christiangalsterer/documentation-plugin/tech-writer/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 tech-writer

Your own site · 80×15
<a href="https://agentmods.dev/skills/christiangalsterer/documentation-plugin/tech-writer"><img src="https://agentmods.dev/badge/skills/christiangalsterer/documentation-plugin/tech-writer.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 116 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,301 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 $0.00116 $0.01301
Opus 5.5 $0.00046 $0.00520
Sonnet 5.5 $0.00023 $0.00260
Haiku 4.5 $0.00012 $0.00130

Measured 20d ago against content hash e8cba42aa2cb, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

tech-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 20d 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.

skills/tech-writer/SKILL.md · 133 lines

How it starts

The opening of the file, as written. The whole thing — 133 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Tech Writer

Write technical documentation in a professional tone and grammar with a fixed document structure and Microsoft Writing Style Guide markdown conventions. Output is always a single markdown document.

Workflow

  1. Identify the audience and goal. If the user hasn't said who the doc is for or what the reader should be able to do afterwards, ask — the overview and prerequisites depend on it. Do not ask about anything else; use the defaults below.
  2. Gather the facts. Read the code, config, or notes the doc covers. Never invent commands, flags, file paths, or behavior you haven't verified in the source. Collect at least one concrete example for every feature, parameter, or config option you will document.
  3. Check for a domain skill. If the document's subject matches an available domain skill (for example kafka-integration for Kafka), use it to verify technical claims before drafting. Treat the user's notes as input to check, not as proof. If no domain skill is available, list the claims you could not verify and flag them in your reply.
  4. Draft using the fixed structure below. Skip a section only when it is genuinely empty (e.g. no prerequisites) — never invent content to fill one. Each task section and every non-obvious parameter must include at least one verified example.
  5. Apply the conventions. Read references/markdown-conventions.md before writing and again as a checklist after drafting. It defines headings, lists, code blocks, links, tables, and tone rules.
  6. Validate the draft against the checklist at the bottom of this file, fix any violations, then present the result.

Fixed document structure

Every document follows this order:

# <Title: concise, sentence case, states the task or topic>

<Overview: 1–3 short paragraphs. What is this, who is it for, what will
the reader achieve. No heading — this text directly follows the title.>

## Prerequisites

<Bullet list of required tools, access, knowledge, or prior steps. Omit
the whole section if nothing is required.>

## <Task sections — one H2 per major step or topic>

<Numbered steps for procedures; prose for concepts. Each step: one action,
imperative mood, starts with a verb.>

1. First action.
1. Second action. (Use `1.` for every item — let the renderer number them.)

### <Optional H3 subsections within a task>

## Troubleshooting

<Problem → cause → solution, one H3 per issue or a table. Omit if nothing
is known to go wrong.>

## Next steps

<Bullet list of links to related docs or follow-up tasks.>

Read the full file on GitHub · 133 lines

Files

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.

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. 20d ago Changed · +6 lines e8cba42aa2cb
  2. 1mo ago Changed · +2 tokens per session 31d21c5be74e
  3. 1mo ago First seen · 127 lines · 114 tokens per session scan A 29e5c3b81c28

Subscribe to this mod's changes

tech-writer is a skill published in the GitHub repository christiangalsterer/documentation-plugin (1 stars, last pushed 21d ago), licensed MIT. It adds 116 tokens to every session and 1,301 once invoked, about $0.0005 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 2026-08-31.

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