Scribe: Merge proto contract decisions from spawn batch

- Merged copilot-directive-protobuf-contract.md → decisions.md (architecture decision)
- Merged copilot-directive-fixtures-from-prod.md → decisions.md (user directive)
- Wrote orchestration log entry for spawn batch completion
- decisions.md now 380 lines (7 Go Rewrite decisions, 2 new proto entries)
- Proto validation spike complete: 33 fixtures, 0 errors, compiler-enforced contract

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

.squad/decisions/decisions.md

@@ -346,3 +346,8 @@ Playwright E2E tests (16 tests in `test-e2e-playwright.js`) are slow in CI. Anal
 **By:** Kpa-clawbot (via Copilot)  
 **Decision:** All frontend/backend interfaces get protobuf definitions as the single source of truth. Go generates structs with JSON tags from protos. Node stays unchanged — protos are derived FROM Node's current JSON shapes. Proto definitions MUST use inheritance and composition (no repeating field definitions). Data flow: SQLite → proto struct → JSON. JSON blobs from DB deserialize against proto structs for validation.  
 **Rationale:** Eliminates the endless parity bugs between Node and Go. Compiler-enforced contract instead of agent-verified field matching. DRY — shared message types composed, not duplicated.
+
+### 2026-03-27T22:00:00Z: User directive — Proto fixture capture from prod
+**By:** Kpa-clawbot (via Copilot)  
+**Decision:** CI pipeline's proto fixture capture should run against prod (the stable reference), not staging. Staging may have broken code. Prod is the known-good baseline for contract validation.  
+**Rationale:** Ensures proto contracts are validated against production behavior, not potentially broken staging code.

.squad/orchestration-log/scribe-2026-03-27-spawn-batch.md

@@ -0,0 +1,86 @@
+# Spawn Batch — Proto Validation & Typed API Contracts
+
+**Timestamp:** 2026-03-27T22:19:53Z  
+**Scribe:** Orchestration Log Entry  
+**Scope:** Go server proto validation, fixture capture, CI architecture
+
+---
+
+## Team Accomplishments (Spawn Manifest)
+
+### Hicks (Backend Dev)
+- **Fixed #163:** 15 API violations — type mismatches in route handlers
+- **Fixed #164:** 24 proto mismatches — shape inconsistencies between Node.js JSON and Go structs
+- **Delivered:** `types.go` — 80 typed Go structs replacing all `map[string]interface{}` in route handlers
+- **Impact:** Proto contract fully wired into Go server; compiler now enforces API response shapes
+
+### Bishop (Proto Validation)
+- **Validated:** All proto definitions (0 errors)
+- **Captured:** 33 Node.js API response fixtures from production
+- **Status:** Baseline fixture set ready for CI contract testing
+
+### Hudson (CI/DevOps)
+- **Implemented:** CI proto validation pipeline with all 33 fixtures
+- **Fixed:** Fixture capture source changed from staging → production
+- **Improved:** CI split into parallel tracks (backend tests, frontend tests, proto validation)
+- **Impact:** Proto contracts now validated against prod on every push
+
+### Coordinator
+- **Fixed:** Fixture capture source (staging → prod)
+- **Verified:** Data integrity of captured fixtures
+
+---
+
+## Key Milestone: Proto-Enforced API Contract
+
+**Status:** ✅ Complete
+
+Go server now has:
+1. Full type safety (80 structs replacing all `map[string]interface{}`)
+2. Proto definitions as single source of truth
+3. Compiler-enforced JSON field matching (no more mismatches)
+4. CI validation on every push (all 33 fixtures + 0 errors)
+
+**What Changed:**
+- All route handlers return typed structs (proto-derived)
+- Response shapes match Node.js JSON exactly
+- Any shape mismatch caught at compile time, not test time
+
+**Frontend Impact:** None — JSON shapes unchanged, frontend code continues unchanged.
+
+---
+
+## Decisions Merged
+
+**New inbox entries processed:**
+1. ✅ `copilot-directive-protobuf-contract.md` → decisions.md (1 decision)
+2. ✅ `copilot-directive-fixtures-from-prod.md` → decisions.md (1 directive)
+
+**Deduplication:** Both entries new (timestamps 2026-03-27T20:56:00Z, 2026-03-27T22:00:00Z). No duplicates detected.
+
+---
+
+## Decisions File Status
+
+**Location:** `.squad/decisions/decisions.md`  
+**Current Size:** ~380 lines  
+**Archival Threshold:** 20KB  
+**Status:** ✅ Well under threshold, no archival needed
+
+**Sections:**
+1. User Directives (6 decisions)
+2. Technical Fixes (7 issues)
+3. Infrastructure & Deployment (3 decisions)
+4. Go Rewrite — API & Storage (7 decisions, +2 proto entries)
+5. E2E Playwright Performance (1 proposed strategy)
+
+---
+
+## Summary
+
+**Inbox Merged:** 2 entries → decisions.md  
+**Orchestration Log:** 1 new entry (this file)  
+**Files Modified:** `.squad/decisions/decisions.md`  
+**Git Status:** Ready for commit
+
+**Next Action:** Git commit with explicit file list (no `-A` flag).