WP-0004: ecosystem integration complete

Add Helix Forge correlation (HELIX_SESSION_UID env, metrics correlate),
artifact-store publish (metrics publish), activity-core ActivityDefinition
references, integration patterns docs, and canon/knowledge design artifacts.

history/2026-06-16-ecosystem-assessment.md

@@ -138,5 +138,35 @@ See `wiki/EcosystemIntegration.md` for integration contracts.
 
 ## Follow-Up Workplans
 
-- **KAIZEN-WP-0003** — measurement loop (active, State Hub registered)
-- **KAIZEN-WP-0004** — ecosystem integration (active, depends on WP-0003 Part 3)
+- **KAIZEN-WP-0003** — measurement loop (completed 2026-06-18)
+- **KAIZEN-WP-0004** — ecosystem integration (completed 2026-06-18)
+
+---
+
+## WP-0004 Outcomes (2026-06-18)
+
+### Part 1 — Helix Forge correlation
+
+- `HELIX_SESSION_UID` env auto-merge on `metrics record`
+- `kaizen-agentic metrics correlate <uid>` read-only adapter (sqlite or stub)
+- Contract: `docs/integrations/helix-forge-correlation.md`
+- Worked example in `wiki/EcosystemIntegration.md`
+
+### Part 2 — activity-core triggers
+
+- Three ActivityDefinition reference copies under `docs/integrations/activity-definitions/`
+- Activation contract: `docs/INTEGRATION_PATTERNS.md`
+
+### Part 3 — artifact-store evidence
+
+- `kaizen-agentic metrics publish` with `raw-evidence` retention class
+- Manifest: `docs/integrations/optimizer-artifact-manifest.md`
+
+### Part 4 — Canon and knowledge (stretch)
+
+- Template mapping: `docs/integrations/canon-template-mapping.md`
+- tdd-workflow canon brief: `docs/integrations/briefs/tdd-workflow-canon-brief.md`
+- kontextual-engine spike: `docs/integrations/kontextual-wiki-ingestion-spike.md`
+
+No hard dependencies on info-tech-canon, kontextual-engine, or agentic-resources
+runtime in kaizen-agentic — integration remains contract-based.