MechaCat02 30fe160f16 feat(apply): cross-repo blast-radius in the plan preview ...

§7 M3 (part 2): planning a change to a GROUP node now reports the descendant
apps owned by OTHER projects that the change fans out to — the cross-repo
signal an operator needs before touching shared config.

- OwnershipPreview gains `blast_radius: Vec<ProjectImpact>`; `group_blast_radius`
  walks the group's subtree (recursive CTE) and groups descendant apps by their
  nearest-claimed-ancestor project, excluding the planning project. Ancestor
  resolution is memoized per group (one walk per distinct descendant group, not
  per app).
- `pic plan` renders `blast_radius` rows (mode-agnostic).
- the apply_ownership journey gains a plan-preview case pinning both the
  ownership annotation (claim / conflict) and the blast radius (two other
  projects' apps surfaced) end to end.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

2026-07-06 21:17:15 +02:00

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