llms.txt git:20261010.0d913f7A

Immutable. This exact content never changes and is served at /api/v1/blob/22dbe788506b58b8.

# llms-txt-writer

> A Claude Code skill (Python, MIT, v0.2.0) that writes documents optimized to be cited by AI search engines (ChatGPT, Perplexity, Gemini). Follows Answer.AI's `llms.txt` standard and checks each draft with GEO-SFE 3-layer static analysis backed by Victorino LLC, The Digital Bloom, Position Digital, Omniscient Digital, and arXiv:2603.29979.

Status: active; synced one way from the author's Claude Code harness via `scripts/sync-from-local.sh`.

## Core documentation

- [llms-full.txt](llms-full.txt): self-contained Q&A reference for AI agents (Project Facts, Prior Research, 9 question-form H2 sections)
- [README.md](README.md): human-facing narrative (install, how it works, GEO metrics, examples)
- [SKILL.md](skills/llms-txt-writer/SKILL.md): full skill specification — when to use, post-script interpretation, ski-ramp optimization techniques 1 / 2 / 3, anti-patterns
- [CHANGELOG.md](CHANGELOG.md): release notes (v0.2.0 initial release)
- [scripts/sync-from-local.sh](scripts/sync-from-local.sh): one-way export of the skill from the author's harness into this repo

## Architecture

- [scripts/geo_check.py](skills/llms-txt-writer/scripts/geo_check.py): bilingual (EN / JA) static analyzer — 5 GEO metrics in one pass, text or `--json` output; imports only the Python standard library (Japanese handled with regular expressions)
- [pyproject.toml](skills/llms-txt-writer/pyproject.toml): Python 3.11+ with `uv`; declares `markdown-it-py`, `textstat`, `ginza`, `ja-ginza`, which `geo_check.py` does not import
- [tests/test_geo_check.py](skills/llms-txt-writer/tests/test_geo_check.py): 48 passing unit + integration tests
- [fixtures/](skills/llms-txt-writer/fixtures/): `sample_en.md`, `sample_ja.md` — minimal worked examples

## Standard reference

- [llmstxt.org](https://llmstxt.org/): Answer.AI's `llms.txt` proposal (Jeremy Howard, 2024), which defines `llms.txt`; the `llms-full.txt` companion this skill also writes is a community convention (as of 2026-08-23)
- [arXiv:2603.29979](https://arxiv.org/abs/2603.29979): GEO-SFE framework paper — macro / meso / micro analysis layers

## Sibling skills

- [readme-writer](https://github.com/shimo4228/readme-writer): the human-facing counterpart — rewrites or reviews a README so first-time visitors can tell what the project is; a fresh judge checks the page against the code
- [jsonld-knowledge-graph](https://github.com/shimo4228/jsonld-knowledge-graph): designs and ships a JSON-LD knowledge graph (`graph.jsonld`) next to `llms.txt`
- [claude-skill-writing-ecosystem](https://github.com/shimo4228/claude-skill-writing-ecosystem): orchestrator for human-facing articles and essays
- [Authorship Strategy](https://github.com/shimo4228/authorship-strategy): the parent practice line (concept DOI 10.5281/zenodo.20263316); its ADR-0006 asks for both a prose entry point (`llms.txt`) and a concept graph (`graph.jsonld`)
- [shimo4228](https://github.com/shimo4228/shimo4228): the author's hub — the practice lines, their DOIs, and the tools