Add AI documentation skills

.ai/skills/cmba-historical-bylaws/SKILL.md

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+---
+name: cmba-historical-bylaws
+description: Use when answering questions about historical CMBA constitution/bylaws text from this repository's git history. This skill restricts references to the approved historical sources only: the initial commit containing the 2016 constitution/bylaws content, plus the tagged releases 2022-01-09, 2023, and 2024. Do not use newer draft, rc, test, or other tags as authority.
+---
+
+# CMBA Historical Bylaws
+
+Use this skill when the user asks what the CMBA rules/bylaws said in a prior year, how language changed over time, or to quote or compare historical versions.
+
+## Approved sources
+
+Read [references/source-map.md](references/source-map.md) first. Treat its whitelist as authoritative.
+
+Only use these git refs as historical authority:
+
+- `1e16926c5f76989d8821dc3f2b0df0c1c500e8e9` for the imported 2016 constitution/bylaws text
+- `refs/tags/2022-01-09`
+- `refs/tags/2023`
+- `refs/tags/2024`
+
+Do not cite or summarize newer tags such as `draft*`, `rc*`, `v2026*`, or similar release-prep tags.
+
+## Workflow
+
+1. Identify which approved version or comparison the user wants.
+2. Use the path listed in `references/source-map.md` for that ref.
+3. Prefer direct git reads over working tree files, for example:
+   - `git show refs/tags/2024:src/cmba-bylaws.md`
+   - `git show 1e16926c5f76989d8821dc3f2b0df0c1c500e8e9:content`
+4. When comparing versions, use `git diff --word-diff=color <old-ref> <new-ref> -- <path>` and adjust paths if the file moved between refs.
+5. In the answer, name the exact ref and the document path used.
+
+## Guardrails
+
+- Be explicit about dates and refs. The initial commit date is `2021-11-09`, but it imports the `2016` constitution/bylaws text.
+- If a user asks for "latest" historical bylaws, interpret that as the latest approved historical tag: `refs/tags/2024`.
+- If a request would rely on an unapproved newer tag, say that newer tags are drafts and are intentionally excluded from historical reference.
+- If wording differs because of formatting or conversion, say so rather than claiming a substantive rule change.