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.
npx skills add kid-sid/codex-spellbook --skill technical-documentationgit clone --depth 1 https://github.com/kid-sid/codex-spellbookWrote 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.
[](https://agentmods.dev/skills/kid-sid/codex-spellbook/technical-documentation)<a href="https://agentmods.dev/skills/kid-sid/codex-spellbook/technical-documentation"><img src="https://agentmods.dev/badge/skills/kid-sid/codex-spellbook/technical-documentation/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.
<a href="https://agentmods.dev/skills/kid-sid/codex-spellbook/technical-documentation"><img src="https://agentmods.dev/badge/skills/kid-sid/codex-spellbook/technical-documentation.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00049 | $0.03202 |
| Opus 5 | $0.00024 | $0.01601 |
| Sonnet 5 | $0.00010 | $0.00640 |
| Haiku 4.5 | $0.00005 | $0.00320 |
Grade A, and why
technical-documentation 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 5d 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.
How it starts
The opening of the file, as written. The whole thing — 453 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Technical Documentation
Good technical documentation reduces onboarding time, prevents repeated questions, and makes systems maintainable by people who didn't build them.
When to Activate
- Writing a README for a new project or service
- Documenting an API with OpenAPI/Swagger
- Writing a runbook for an on-call engineer
- Creating an onboarding guide for a team
- Documenting a significant technical decision (ADR)
- Setting up documentation-as-code with auto-deploy to GitHub Pages
README Structure
A README is the front door to your project — it answers "what is this and how do I use it?" in under 5 minutes.
# service-name
[](...)
[](...)
One-sentence description of what this service does.
## Prerequisites
- Python 3.12+ / Node.js 20+ / Go 1.22+
- Docker 24+
- PostgreSQL 16 (or `docker compose up db`)
## Quickstart
\```bash
git clone https://github.com/org/service-name
cd service-name
cp .env.example .env # fill in required values
docker compose up -d db # start dependencies
make install # install dependencies
make dev # start dev server on :8000
\```
## Configuration
| Variable | Required | Default | Description |
|----------|----------|---------|-------------|
| `DATABASE_URL` | Yes | — | PostgreSQL connection string |
| `JWT_SECRET` | Yes | — | 32-byte secret for JWT signing |
| `LOG_LEVEL` | No | `INFO` | Log verbosity (DEBUG/INFO/WARN/ERROR) |
| `PORT` | No | `8000` | HTTP server port |
## Development
\```bash
make test # run unit + integration tests
make lint # run linters
make typecheck # run type checker
make build # build production artifact
\```
See [docs/development.md](docs/development.md) for detailed setup, running locally, and debugging.
## Deployment
This service is deployed via GitHub Actions. See [docs/deployment.md](docs/deployment.md).
## Contributing
1. Fork the repo and create a branch: `feat/your-feature`
2. Make changes, write tests
3. Open a PR — the CI must be green before review
See [CONTRIBUTING.md](CONTRIBUTING.md) for the full guide.
## License
MIT — see [LICENSE](LICENSE)
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.
- 5d ago First seen · 453 lines · 49 tokens per session scan A 362c136010ea
technical-documentation is a skill published in the GitHub repository kid-sid/codex-spellbook (21 stars, last pushed 4mo ago), licensed MIT. It adds 49 tokens to every session and 3,202 once invoked, about $0.0002 per session on Opus 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 2026-09-03.
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