Per t-projax-6-sliceB-readpath. mBrian migration (m/mBrian#73) is live
on msupabase with 65 nodes + 78 child_of + 81 projax-* edges. This
commit makes the projax read path source from there behind an env
switch.
CLIENT ARCH: direct pgxpool against mbrian.* schema (same
SUPABASE_DATABASE_URL the projax binary already uses for projax.*) —
matches flexsiebels/head's cross-coupling pattern. No MCP token
plumbing.
CONTRACT (all three honoured)
- External links are SELF-EDGES (source=target=item, rel='projax-*',
payload in edges.metadata). linkFromEdge reads the node's outbound
projax-* edges; ref_id derived per ref_type from metadata (caldav
url, gitea owner/repo, mai-project mai_project_id).
- Slugs finalised: 'work'/'dania' resolve to mBrian's canonical nodes;
projax-side squatters (renamed-aside, not deleted) are documented in
the parity test as legacy-only and skipped from field comparison.
- created_at/updated_at NOT preserved — ItemsCreatedInRange orders off
metadata.projax.start_time when present, fall back to mBrian
created_at. Aggregator surfaces (timeline / dashboard) read off
caldav DTSTART + gitea updated_at, so they're unaffected.
NEW FILES
- store/mbrian.go: MBrianReader concrete impl. Bulk-loads projax-
managed nodes + child_of edges in one pair of queries per call,
builds a graphContext in memory, derives Paths via ancestor walk
(depth-capped at 64 like projax's trigger). Implements every
ItemReader method.
- store/mbrian_parity_test.go: 5 parity tests against the live db —
ListAll field equality (skipping the renamed squatter slugs),
spot-check resolves, caldav-list link round-trip, gitea-repo link
round-trip, AllTags union, NotFound consistency. All 5 GREEN.
- cmd/projax-remap-views/main.go: one-shot tool to rewrite
projax.views.filter_json.project_id from old projax uuids to new
mBrian uuids using the audit map mBrian dropped (head will relay
the path). Dry-run default; --apply commits. Idempotent.
- docs/plans/slice-b-views-projectid-gap.md: surfaces the gap + the
remediation path. Must run remap BEFORE slice E drops projax.items.
CHANGES
- store/adapter.go: kept the ItemReader interface + *Store assertion;
removed the prep stub (replaced by mbrian.go).
- web/server.go: Server.Items store.ItemReader field. web.New defaults
Items to the concrete *Store (legacy path). main.go overrides to
MBrianReader when PROJAX_BACKEND=mbrian.
- All read-path call sites in web/ swapped from s.Store.<readMethod>(
to s.Items.<readMethod>( for the 15 ItemReader methods. MCP tools
unchanged (separate scope; can pivot in a follow-up). Writes still
flow through s.Store.
- cmd/projax/main.go: PROJAX_BACKEND env switch with "store" (default)
and "mbrian" values. Logs the choice at startup. Unknown value
refuses to start.
SMOKE
- go build ./... green; go vet green.
- go test ./store/ -count=1 — all parity tests pass against live data.
- Local server boot with PROJAX_BACKEND=mbrian — backs binding logs
"backend=mbrian (read path via store.MBrianReader)" and serves
/views/tree (auth wall protects deeper smoke; parity tests cover
that surface).
PRE-EXISTING failure NOT addressed in this commit: 3 timeline_filter
tests in web/ already failed on main (legacy /timeline URL hits the
Phase 5j 301 redirect to /views/timeline). No diff vs main in those
test files; out of scope for slice B.
OUT OF SCOPE FOR SLICE B (deferred):
- MCP read tools migration to ItemReader (separate diff, low risk).
- Aggregator's LinkLister wired to ItemReader (currently consumes
*Store directly through Server.Aggregator()).
- views.filter_json.project_id remap RUN — tool ships here, run waits
on the head's relay of the audit-map path.
- Slice C write-path. Slice D mai-bridge worker. Slice E drop.
mAi
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