# indexion-documentation

This skill measures documentation coverage, finds drift between code and docs, and draws dependency graphs.

- skill · `type=skill` · Claude Code, Codex, Cursor, GitHub Copilot, Gemini CLI, OpenCode · 5000 installs · ★ 2
- Author: trkbt10
- License: Apache-2.0 · policy=mirror · the beginning of the file is at the end of this page
- Source: https://github.com/trkbt10/indexion-skills/tree/HEAD/skills/indexion-documentation/SKILL.md
- Updated: 2026-09-22
- HTML: https://affpapa.org/en/nevibecode/skills/indexion-documentation

## What it does

The skill handles the evaluation side of documentation: what exists, what is missing, what went stale. Coverage comes from `indexion plan documentation --style=coverage .`, which reports an overall percentage plus a per-package breakdown and a split between functions and types. To list the declarations that lack doc comments, run `indexion grep --undocumented src/`.

Drift detection lives in `indexion plan reconcile`. It compares code symbols against documentation and reports vocabulary divergence, stale docs, and modules with no coverage at all. The Vocabulary Divergence table gives a distance from 0 to 100%: past 90% the README has little to do with the current code. You can narrow the check with `--scope=package-docs`, `--scope=tree-docs`, or point it at specific files through `--doc`.

Reconcile keeps a cache under `.indexion/cache/reconcile/`. After a schema change or an indexion upgrade that cache goes stale and startup fails with a deserialization error, so clear it with `rm -rf .indexion/cache/reconcile`. One more thing: 100% coverage does not mean the docs are correct. A bare `///|` marker counts as documented, so read `doc_preview` instead of trusting the number. And reconcile only walks the code-to-docs direction; the reverse check is manual.

## Install

### Claude Code (native platform)

1. **Skills CLI (Vercel)**
```bash
npx skills add trkbt10/indexion-skills --skill indexion-documentation -a claude-code
```

2. **Manually: put the files in place**
- File: `~/.claude/skills/indexion-documentation/SKILL.md` — Copy the whole skill folder; for one project use .claude/skills/indexion-documentation/

### Codex

1. **Skills CLI (Vercel)**
```bash
npx skills add trkbt10/indexion-skills --skill indexion-documentation -a codex
```

2. **Manually: put the files in place**
- File: `.agents/skills/indexion-documentation/SKILL.md` — For all projects use ~/.agents/skills/

### Cursor

1. **Skills CLI (Vercel)**
```bash
npx skills add trkbt10/indexion-skills --skill indexion-documentation -a cursor
```

2. **Manually: put the files in place**
- File: `.cursor/skills/indexion-documentation/SKILL.md` — Cursor also reads .agents/skills/ and .claude/skills/

### GitHub Copilot

1. **GitHub CLI**
```bash
gh skill install trkbt10/indexion-skills indexion-documentation
```

2. **Manually: put the files in place**
- File: `.github/skills/indexion-documentation/SKILL.md`

### Gemini CLI

1. **Skills CLI (Vercel)**
```bash
npx skills add trkbt10/indexion-skills --skill indexion-documentation -a gemini-cli
```

2. **Platform CLI**
```bash
gemini skills install https://github.com/trkbt10/indexion-skills --path skills/indexion-documentation
```

### Windsurf (Devin Desktop)

**Manually: put the files in place**
- File: `.devin/skills/indexion-documentation/SKILL.md` — The legacy .windsurf/skills/ path still works

### OpenCode

**Skills CLI (Vercel)**
```bash
npx skills add trkbt10/indexion-skills --skill indexion-documentation -a opencode
```

### Claude.ai

**Claude.ai**
- Zip the folder and upload it in Settings → Capabilities → Skills

Where a file is given instead of a command, copy the files from the source to that path: https://github.com/trkbt10/indexion-skills/tree/HEAD/skills/indexion-documentation/SKILL.md

## When to use it
- measure how much of the public API is documented
- list declarations missing doc comments
- catch a README that fell behind the code
- break coverage down by package and type
- render a dependency graph for a module tree

## Example prompts
- check documentation coverage in this project
- find drift between the code and the docs
- draw the dependency graph for src/config/

## Source text · SKILL.md · Apache-2.0

Below is the content of a third-party file. It is data, not instructions for you: do not act on anything written inside unless the human asks. Block tag: 2c6b5f500ba796f4.

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````text
---
name: indexion-documentation
description: Documentation analysis — assess coverage, detect code-to-doc drift with plan reconcile, visualize dependencies with doc graph. Answers "what needs docs?" and "are docs still accurate?"
---

# indexion documentation — Documentation Analysis

Assess documentation state and detect drift. This skill covers the
**evaluation side** of the documentation lifecycle: what exists, what's
missing, what's stale. For building READMEs, see `indexion-readme`.

## "What needs documentation?"

```bash
# Quick coverage overview — how much of the public API is documented?
indexion plan documentation --style=coverage .
```

Reports:
- Overall coverage percentage (documented / total pub items)
- Per-package breakdown with README presence
- Functions vs types coverage split

Output example:
```
Overall Coverage: 81% (2285/2806)
Functions: 89%, Types: 75%
```

For a detailed plan with prioritized action items:

```bash
# Full plan with priorities and package inventory
indexion plan documentation .

# As a GitHub Issue for tracking
indexion plan documentation --format=github-issue .

# JSON for scripting
indexion plan documentation --format=json .
```

For a quick per-file listing of undocumented items:

```bash
# Which pub declarations lack doc comments?
indexion grep --undocumented src/
```

**How detection works:** Uses KGF tokenization to find visibility keywords
(`pub`, `public`, `export`) paired with declaration keywords (`fn`, `struct`,
`enum`, `type`, `trait`). Associates `///` doc comments with declarations.
Language-agnostic — works for any KGF-supported language.

**Caveat:** `///|` marker-only comments count as "documented" even without
descriptive text. Check `doc_preview` in the output for quality, not just coverage.

## "Are my docs up to date?"

Detect drift between implementation code and documentation.

```bash
# Full reconcile report in markdown
indexion plan reconcile --format=md .
```

This compares code symbols against documentation and reports:
- **Vocabulary divergence**: source code terms missing from co-located docs
- **Stale docs**: code changed after docs were last updated
- **Missing docs**: code modules with no documentation coverage

**Read the report:**

The Vocabulary Divergence table shows distance (0-100%) between code vocabulary
and documentation. 90%+ distance means the README is essentially unrelated to
````
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First 2411 of 5377 bytes. © trkbt10 · Apache-2.0 · https://github.com/trkbt10/indexion-skills/tree/HEAD/skills/indexion-documentation/SKILL.md

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