session-memory Phase 1: T08 verify across all three flavors + docs

Marks AGENTIC-WP-0003 finished. Full suite 40/40 green; live pipeline
over real local sessions (Codex via fixtures) surfaced 3 candidate
patterns, 2 cross-flavor (Claude+Grok) — PRD success metric met.
README documents the detect entrypoint and Phase 0/1/next status.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

workplans/AGENTIC-WP-0003-session-memory-phase1.md

@@ -4,7 +4,7 @@ type: workplan
 title: "Coding Session Memory — Phase 1 (Codex + Grok adapters, Detect)"
 domain: helix_forge
 repo: agentic-resources
-status: active
+status: finished
 owner: codex
 topic_slug: helix-forge
 created: "2026-06-06"
@@ -145,7 +145,7 @@ session_memory README.
 
 ```task
 id: AGENTIC-WP-0003-T08
-status: todo
+status: done
 priority: medium
 state_hub_task_id: "b272c3fa-af81-4a6c-9ed9-7b42173efa81"
 ```
@@ -161,3 +161,9 @@ questions. After workplan file updates, notify the custodian operator to run fro
 ```bash
 make fix-consistency REPO=agentic-resources
 ```
+
+**Verification results (2026-06-06):** full suite 40/40 green. Live pipeline over
+real local sessions (Codex not installed → fixtures): ingested 88 → 67 digests
+(63 Claude + 4 Grok); detect surfaced 3 candidate patterns, **2 cross-flavor**
+(Claude+Grok) — "clean pass" success across 18 sessions and "abandoned" problem
+across 13 — plus a Claude-only budget-overrun. PRD cross-flavor success metric met.