docs: checkpoint develop workflow plan approval

docs/workflow/develop-workflow-record.md

@@ -2,9 +2,9 @@
 
 ## Status
 
-- Status: waiting
-- Current phase: plan approval
-- Next safe action: obtain explicit approval of the exact implementation plan below. Do not edit production files before approval.
+- Status: active
+- Current phase: implementation
+- Next safe action: launch the recorded disjoint assignments and implement the parent-owned slices.
 
 ## Request and scope
 
@@ -39,7 +39,7 @@ Scenario evaluation and the three-change pilot remain follow-on validation becau
 
 - Source plan: [`skill-led-development-workflow-plan.md`](./skill-led-development-workflow-plan.md), status Accepted.
 - Broad direction: approved by the user on 03SEP2026 with “let's implement”.
-- Exact production plan: pending explicit approval.
+- Exact production plan: approved by the user on 04SEP2026.
 - Dirty-source gate: approved on 03SEP2026; omit the unrelated source-checkout change.
 - UI classification: no product UI change, so prototype direction approval does not apply.
 - Current risk classification: no dependency, migration, production, security-posture, destructive, or compatibility action is planned. Open a scoped gate if discovery changes this.
@@ -137,7 +137,7 @@ Before integration, abandon only by preserving evidence and obtaining cleanup ap
 - Parent agent: orchestration, record, skill prose/template/references, review and implement skills, link/package integration, ADR/docs, verification, commits, review brief, integration.
 - `checkpoint-implementer`: checkpoint helper and its test only; mutator and reviewer-ineligible.
 - `reviewer-profile-implementer`: reviewer profile, README section, and focused profile test only; mutator and reviewer-ineligible.
-- Assignment start/stop times, stable child IDs, before/after evidence, and outcomes will be checkpointed before and after each mutating assignment.
+- Planned assignment launch: 04SEP2026 after commit `b75de2d`; names `checkpoint-implementer` and `reviewer-profile-implementer`, 15-minute deadlines. The available direct subagent tool does not expose stable child IDs at launch, so names identify these runs and the entire ambiguous run remains reviewer-ineligible. Start/stop evidence and outcomes will be checkpointed before and after each assignment.
 
 ## Verification matrix
 
@@ -167,6 +167,6 @@ Rebase the feature branch onto the latest remote/local `main` when available, re
 
 - Initial record created and committed at `256f001` before production mutation.
 - Three read-only discovery assignments completed without file ownership or mutation.
-- Exact plan checkpoint prepared on 04SEP2026.
-- Blocker: explicit user approval of this exact plan is required before production edits.
-- After approval: record and commit the gate decision, capture Git evidence, then launch the two disjoint mutating assignments and begin the parent-owned skill/docs slice.
+- Exact plan checkpoint prepared at `b75de2d` and explicitly approved by the user on 04SEP2026.
+- Pre-assignment evidence: branch `feature/develop-workflow`, HEAD `b75de2d`, clean status, changed paths none.
+- Next safe action: after this gate-decision commit, launch the two disjoint mutating assignments and begin the parent-owned skill/docs slice.