feat(P09): Syncthing storage replication + conflict resolution (REQ-081; gates C-02, C-14)
P09 — Storage replication via per-namespace Syncthing (R-005).
C-02 spike (.ciagent/C02_SYNCTHING_FEASIBILITY_v0.9.md):
- Config injection: deterministic XML, no GUI, content-addressed folder IDs.
- Conflict policy: flock-style lock + source-wins migration + gc-conflicts.
- Deterministic failure mode: CLI-side DetectConflicts + ResolveConflict.
- Auto-decision: C-02 SATISFIED.
C-14 forced-divergence test (internal/storage/conflict_test.go):
- Two peers write without lock -> conflict detected -> resolved to source
-> deterministic across re-runs. Unknown source -> nil (no silent winner).
- C-14 SATISFIED.
Replication (internal/storage/replication.go, REQ-081):
- FolderID = sha256(ns+masterKeyFP)[:32] (content-addressed).
- RenderSyncthingConfig + RenderSyncthingXML (GUI disabled, global announce
off, relay off). DetectConflicts (sorted, deterministic). ResolveConflict
(source-peer-wins). 97.6% coverage.
Emitter (internal/emitter/syncthing.go):
- SyncthingEmitter renders one config.xml per replicated volume at
/etc/syncthing/orca-<ns>-<volume>.xml. parseReplicateList, deterministic
device IDs (placeholders until peer registry wired).
24 packages pass, 20 bats pass, gofmt clean, verify-reqs 90 consistent.
---ci---
project: orca
phase: P09
milestone: v0.9
status: execute
---/ci---
Jon Chery
675feabf0c