Complete session-only manifest migration

docs/roadmap/implementation.md

@@ -7,9 +7,10 @@ This is the executable plan for [`refactoring.md`](refactoring.md), Workstream
 [`contract-audit.md`](contract-audit.md) and rows H14, H15, H17, C02, and C03
 of [`audit-decisions.md`](audit-decisions.md) own the approved decisions.
 
-All five stages are pending and must be implemented in order. Each stage is
-bounded for one `gpt-5.6-terra` prompt. Workstreams 1 through 3 are complete.
-Workstreams 5 and later are out of scope: do not decompose the runner into a
+**Status: Completed**
+
+All five stages are completed. Workstreams 1 through 4 are complete.
+Workstreams 5 and later remain out of scope: do not decompose the runner into a
 new lifecycle type, redesign pre-execution decisions, add per-artifact analyze
 checkpoints, split publish into separate transactions, add cleanup as a stage,
 or change remote lock policy while following this plan.
@@ -333,7 +334,7 @@ path, and mechanism tests from their owning packages.
 
 ## Stage 5 — Reconcile Current Documentation And Close Workstream 4
 
-**Status: Pending**
+**Status: Completed**
 
 ### Goal
 

docs/roadmap/refactoring.md

@@ -189,7 +189,7 @@ code and fail clearly instead of being inferred or normalized.
 
 ### Workstream 4 — One durable local manifest authority
 
-**Status:** Pending
+**Status:** Complete
 
 **Audit sources:** H14, H15, H17, C02, and C03.