MechaCat02 193336a8a6 feat(hierarchies): multi-repo single-owner ownership + structural prune (M3) ...

§7 of the groups/project-tool design. A group node is now authoritatively
managed by exactly one project-root; `pic apply --dir` claims, conflicts,
takes over, and (with --prune) structurally reaps owned nodes.

- Migration 0052: `projects(id, key UNIQUE)` + promote the inert
  `groups.owner_project` (0047) to a real FK (ON DELETE SET NULL) + index.
- CLI mints a stable, gitignored project key in `.picloud/project.json`
  (`pic init`, or lazily on first tree plan/apply) and presents it on every
  tree request; `pic apply --dir --takeover` flag.
- Server: prepare_tree resolves ownership read-only (plan surfaces conflicts
  + prune candidates; token folds each group's owner key). apply_tree upserts
  the project in-tx, claims created groups on insert, reconciles existing-group
  ownership under the per-node advisory lock (first-commit-wins), and prunes
  owned-but-undeclared groups leaf-first (delete=RESTRICT, never another repo's
  or a UI-owned node).
- Authz (§7.4, ownership ⟂ RBAC): takeover requires GroupAdmin per contested
  node — enforced in authz_tree (pre-tx) AND re-verified in-tx at the ownership
  decision, so --force (which waives the staleness token) can't open a
  takeover-without-admin window. The attacker-supplied project key is
  length/charset-validated server-side.
- Tests: tests/ownership.rs (claim → conflict → takeover → flip; non-admin
  takeover → 403; prune-owned-only); format_conflicts unit test; schema golden
  reblessed. tree_shape M2 journey updated to reparent in-place (a fresh dir is
  now a distinct project and would correctly conflict).

Closes the M3 milestone; reviewed (4 findings: 1 authz-bypass via --force +
key validation + 2 LOW, all fixed). M4 (trigger/route templates) remains.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

2026-06-26 23:04:53 +02:00

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