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 agentmods add skills/douglance/sdlc-plugin/documentationnpx skills add douglance/sdlc-plugin --skill documentationgit clone --depth 1 https://github.com/douglance/sdlc-pluginWhat 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 | $0.00024 | $0.00420 |
| Opus 5 | $0.00012 | $0.00210 |
| Sonnet 5 | $0.00005 | $0.00084 |
| Haiku 4.5 | $0.00002 | $0.00042 |
Grade A, and why
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 yesterday.
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.
What it actually says
Use lifecycle-documentation only when the result needs a durable artifact or handoff.
Document what actually shipped, not what was planned. Read the change, then write the docs a future engineer or agent needs: how to use it, how the interface behaves, and why the key decisions were made.
Docs are only done when they match the shipped behavior. Verify every command, signature, and example against the real code — guesses age into lies.
This skill is ship-time documentation — write the docs once a change lands. For the discipline of capturing decisions as they happen, and the ADR/README formats, see the
documentation-and-adrsskill.
What to write
- README / usage — what it does, how to run it, a working example. Lead with the common path.
- API / interface docs — the public surface: signatures, parameters, return shapes, errors. Match the code exactly.
- ADRs — for decisions with lasting consequences: the context, the decision, the alternatives rejected, and the trade-off accepted.
Principles
- Match the source of truth. Pull examples and signatures from the real code; run commands you document.
- Why over what. Code shows what; docs explain why and how to use it. Don't narrate the obvious.
- Concise and current. Smallest doc that conveys it. Stale docs are worse than none.
What to produce
The files written or updated, and a note of anything you found undocumented but out of scope.
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.
- yesterday First seen · 42 lines · 24 tokens per session scan A 287e480ab79b
documentation is a skill published in the GitHub repository douglance/sdlc-plugin (4 stars, last pushed 1mo ago), licensed MIT. It adds 24 tokens to every session and 420 once invoked, about $0.0001 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 2026-08-31.
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