Data layer for shared cross-app group collections (KV-only MVP), nothing wired
yet. Two migrations + two repos, modeled on the extension_points (0051) marker
and the kv_entries (0007) store:
- 0052_group_collections.sql: owner-polymorphic marker table declaring a
collection name group-shared, with a `kind` discriminator (CHECK 'kv' for
now; generalizes to docs/files/topics/queue later) and per-owner
partial-unique (owner, LOWER(name), kind) indexes. CASCADE — a marker is
config, not code.
- 0053_group_kv_entries.sql: the shared store, keyed by (group_id, collection,
key) — NO app_id (a shared row belongs to the group). CASCADE on group delete
(data dies with its group, like vars/secrets config; an app delete leaves it).
- group_collection_repo: list_for_owner, insert/delete_collection_tx, and the
load-bearing resolve_owning_group — walks the reading app's chain
(CHAIN_LEVELS_CTE) for the nearest ancestor group declaring the name
(nearest-wins via ORDER BY depth LIMIT 1). That walk IS the isolation
boundary; the join is on group_owner only.
- group_kv_repo: a near-clone of kv_repo keyed by group_id.
Schema snapshot re-blessed (53 migrations).
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
f1d5f5c34e