Add a new knowledge document

Create a new knowledge document: scaffold, fill in the durable factual content, and wire it into the knowledge index under the appropriate topic.

• The topic is clear (domain concept, architecture decision, convention, etc.).
• The target topic folder exists under doc/knowledge/<topic>/.

In execution order:

1. Scaffold. Use How do I create a new doc?§"New knowledge document": compass add knowledge.
2. Fill in the Summary. Write the three-to-five sentence summary — the load-bearing field that every grep and index reads.
3. Write the Detail. Fill in the content. Use subheadings for navigability. Every reference to another doc uses [[id:UUID]] links.
4. Tag correctly. Add topic tags (:domain:fx:, :architecture:cmake:, etc.) so the doc is discoverable by compass list.
5. Wire into the inventory. Add an id-link under the appropriate topic heading in Knowledge.
6. Commit and PR. Use commit conventions and create a PR.

• Knowledge doc has all required frontmatter and sections.
• Doc is linked from the knowledge index.
• PR is open.

• Knowledge index — all knowledge documents.
• Runbooks catalogue — all runbooks.