Covers activating a repo: the seeded log and ignore rules (conversations included), materialized quality presets, pre-existing dirty changes committed before the clean install commit, re-activation as a no-op, a non-repo folder initialized first, git failures surfaced as values, and finding which child directories are their own repo roots.

## Before writing SPEC.md files

Read https://raw.githubusercontent.com/brillout/sdd/refs/heads/main/sdd.md
