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.

docs/integrations/helix-forge-correlation.md

@@ -0,0 +1,103 @@
+# Helix Forge Correlation Contract
+
+Cross-repo contract between **kaizen-agentic** (project metrics, ADR-004) and
+**agentic-resources** (Helix Forge fleet session metrics).
+
+## Purpose
+
+Link a project-scoped agent execution record to the fleet session that produced
+it, without duplicating session JSONL ingestion in kaizen-agentic.
+
+## Layers
+
+| Layer | Owner | Storage |
+|-------|-------|---------|
+| Project | kaizen-agentic | `.kaizen/metrics/<agent>/executions.jsonl` |
+| Fleet | agentic-resources | Helix Forge digest store (`digests` table) |
+
+## Correlation fields (ADR-004)
+
+Optional on each project execution record:
+
+```json
+{
+  "helix_session_uid": "claude:17092961-…",
+  "repo": "kaizen-agentic",
+  "flavor": "claude",
+  "tokens": 12500,
+  "infra_overhead_share": 0.12
+}
+```
+
+### Field mapping
+
+| Helix Forge (`session_memory`) | ADR-004 project record |
+|-------------------------------|------------------------|
+| `Session.session_uid` | `helix_session_uid` |
+| `Session.repo` | `repo` |
+| `Session.flavor` | `flavor` |
+| `digest.cost.input_tokens + output_tokens` | `tokens` |
+| MCP tool share of `tool_histogram` | `infra_overhead_share` |
+| `digest.outcome == "success"` | informs `success` at record time |
+| `digest.cost.wall_clock_s` | complements `execution_time_s` |
+
+## Population at session close
+
+### Automatic (environment)
+
+When Helix Forge capture is active in the same shell session:
+
+```bash
+export HELIX_SESSION_UID="claude:17092961-…"
+export HELIX_REPO="kaizen-agentic"
+export HELIX_FLAVOR="claude"
+export HELIX_TOKENS="12500"
+export HELIX_INFRA_OVERHEAD_SHARE="0.12"
+
+kaizen-agentic metrics record tdd-workflow --success --time 4200 --quality 0.9
+```
+
+`metrics record` merges env vars into the execution record before append.
+
+### Explicit (JSON)
+
+```bash
+echo '{
+  "success": true,
+  "execution_time_s": 4200,
+  "quality_score": 0.9,
+  "helix_session_uid": "claude:17092961-…",
+  "repo": "kaizen-agentic",
+  "flavor": "claude",
+  "tokens": 12500,
+  "infra_overhead_share": 0.12
+}' | kaizen-agentic metrics record tdd-workflow --json
+```
+
+## Fleet lookup (read-only)
+
+```bash
+export HELIX_STORE_DB=~/.helix-forge/store.db   # agentic-resources session store
+kaizen-agentic metrics correlate claude:17092961-…
+```
+
+When `HELIX_STORE_DB` is unset, `metrics correlate` returns a **stub** response
+documenting expected fields — no ingestion code runs in kaizen-agentic.
+
+## Bidirectional references
+
+| Document | Repo |
+|----------|------|
+| [ADR-004](../adr/ADR-004-project-metrics-convention.md) | kaizen-agentic |
+| [wiki/EcosystemIntegration.md](../../wiki/EcosystemIntegration.md) | kaizen-agentic |
+| [DESIGN-session-memory.md](https://github.com/coulomb/agentic-resources/blob/main/docs/DESIGN-session-memory.md) | agentic-resources |
+| `session_memory/core/store.py` — `get_digest()` | agentic-resources |
+
+agentic-resources should link back to this document from its session-memory design
+notes when documenting downstream consumers of `session_uid`.
+
+## Non-goals
+
+- No Claude/Codex/Grok JSONL ingestion in kaizen-agentic
+- No write path to Helix Forge from kaizen-agentic CLI
+- No merge of fleet baselines into project `summary.json` (Coach may cite both)