feat(core): 1.AA chat regression harness — complete 1.m5 agent-first sub-spine

CLAUDE.md

@@ -38,7 +38,7 @@ A run executes in one of **three execution modes** behind the one `LLMProvider`
 engine is identical across all three. See [ADR-0012](docs/decisions/0012-managed-inference-dual-mode.md) to [ADR-0015](docs/decisions/0015-managed-mode-data-handling-and-compliance.md)
 and [docs/architecture/managed-inference.md](docs/architecture/managed-inference.md).
 
-**Status:** Phase 1 in progress — milestone M1 (LLM seam proven) reached (PR #9, 2026-06-07); the `FallbackChain` runner (1.K) landed, completing 1.m2 with the cost tracker (PR #13, 2026-06-11); the run loop (1.N — `WorkflowEngine` + `RunEventBus`) landed (PR #17, 2026-06-13) **completing 1.m3** (parse → DAG → run loop emits the canonical event stream), with the built-in `ToolRegistry` (1.T, a 1.m4 component) landing alongside it as the other `AgentRunner` (1.O) join prerequisite; the **`AgentRunner` (1.O) — per-node LLM execution behind the seam — landed (PR #18, 2026-06-14)**; and the **node-type handlers (1.P) — the six non-agent `NodeExecutor` arms (condition / transform / fan_out / fan_in / input / output) behind a dispatching executor — landed (PR #20, 2026-06-14)**; and **checkpoint/resume (1.R) + the human gate (1.Q) landed (PR #22, 2026-06-15)** — the derived `Checkpointer` + cross-process `resumeFromCheckpoint`, and the `human_in_the_loop` gate with the one-shot timeout port; and **node retry (1.S) — the above-chain whole-node retry budget ([ADR-0040](docs/decisions/0040-node-retry-budget-above-the-chain.md), amending ADR-0038) — landed (PR #24, 2026-06-15)**, re-dispatching a whole node on a retryable failure up to `retry.max` attempts (with `node:retrying`, abort-aware backoff, and `retry_on` filtering), with retry-from-node (ADR-0040 Part B) deferred to Phase-2; and the **pre-egress budget governor (1.AC, [ADR-0028](docs/decisions/0028-workflow-resource-governance.md)) + the `AgentSession` agent-first entry point (1.V, [ADR-0024](docs/decisions/0024-agent-first-entry-point-agentsession.md)) landed together (PR #26, 2026-06-16)** — 1.AC was the last 1.m4 component, so **1.m4 is complete** (the full engine stack: node handlers, gate, checkpoint/resume, retry, tools, sandbox, budget governor), and 1.V opens the Lane-C agent-first sub-spine (1.m5); then the **end-to-end Node harness (1.U) landed (PR #27, 2026-06-16), reaching 🎯 M2** — the engine runs end-to-end (live streaming + per-node-boundary checkpointing + cross-process resume + node retry + provider failover, gap-free), **completing the Phase-1 engine critical path**. The remaining Phase-1 work is additive and off the critical path (Lane C: the **`session:*` namespace (1.W) landed (PR #28, 2026-06-17)** — the `SessionEventSink`→`RunEventBus` adapter + per-session `sequenceNumber`, the `SessionHandle`, and the combined `RunOrSessionEventSchema` gate — and **session persistence (1.X) landed (PR #29, 2026-06-17)** — the `agent_sessions`/`session_messages` tables + migration, `SessionMessageSchema`/`AgentSessionSchema`, and the `SessionStore` + domain↔row mappers (data-layer only; the per-turn `AgentSession`→store wiring + resume are 1.Y/1.AA) — leaving 1.Y/1.Z/1.AA next ‖ the 1.m6 multimodal sub-spine); **Phase 2 (CLI, M3) is unblocked**.
+**Status:** Phase 1 in progress — milestone M1 (LLM seam proven) reached (PR #9, 2026-06-07); the `FallbackChain` runner (1.K) landed, completing 1.m2 with the cost tracker (PR #13, 2026-06-11); the run loop (1.N — `WorkflowEngine` + `RunEventBus`) landed (PR #17, 2026-06-13) **completing 1.m3** (parse → DAG → run loop emits the canonical event stream), with the built-in `ToolRegistry` (1.T, a 1.m4 component) landing alongside it as the other `AgentRunner` (1.O) join prerequisite; the **`AgentRunner` (1.O) — per-node LLM execution behind the seam — landed (PR #18, 2026-06-14)**; and the **node-type handlers (1.P) — the six non-agent `NodeExecutor` arms (condition / transform / fan_out / fan_in / input / output) behind a dispatching executor — landed (PR #20, 2026-06-14)**; and **checkpoint/resume (1.R) + the human gate (1.Q) landed (PR #22, 2026-06-15)** — the derived `Checkpointer` + cross-process `resumeFromCheckpoint`, and the `human_in_the_loop` gate with the one-shot timeout port; and **node retry (1.S) — the above-chain whole-node retry budget ([ADR-0040](docs/decisions/0040-node-retry-budget-above-the-chain.md), amending ADR-0038) — landed (PR #24, 2026-06-15)**, re-dispatching a whole node on a retryable failure up to `retry.max` attempts (with `node:retrying`, abort-aware backoff, and `retry_on` filtering), with retry-from-node (ADR-0040 Part B) deferred to Phase-2; and the **pre-egress budget governor (1.AC, [ADR-0028](docs/decisions/0028-workflow-resource-governance.md)) + the `AgentSession` agent-first entry point (1.V, [ADR-0024](docs/decisions/0024-agent-first-entry-point-agentsession.md)) landed together (PR #26, 2026-06-16)** — 1.AC was the last 1.m4 component, so **1.m4 is complete** (the full engine stack: node handlers, gate, checkpoint/resume, retry, tools, sandbox, budget governor), and 1.V opens the Lane-C agent-first sub-spine (1.m5); then the **end-to-end Node harness (1.U) landed (PR #27, 2026-06-16), reaching 🎯 M2** — the engine runs end-to-end (live streaming + per-node-boundary checkpointing + cross-process resume + node retry + provider failover, gap-free), **completing the Phase-1 engine critical path**. The remaining Phase-1 work is additive and off the critical path (Lane C: the **`session:*` namespace (1.W) landed (PR #28, 2026-06-17)** — the `SessionEventSink`→`RunEventBus` adapter + per-session `sequenceNumber`, the `SessionHandle`, and the combined `RunOrSessionEventSchema` gate — and **session persistence (1.X) landed (PR #29, 2026-06-17)** — the `agent_sessions`/`session_messages` tables + migration, `SessionMessageSchema`/`AgentSessionSchema`, and the `SessionStore` + domain↔row mappers (data-layer only); then **session checkpoint/resume (1.Y) + export-to-workflow (1.Z) landed (PR #30, 2026-06-17)** — `reconstructSessionState`/`AgentSession.resume` (reload-not-replay; preload the text-only transcript, re-seed turnCount/cost, no `session:started` re-emit) + the `serializeWorkflow`/`sessionToWorkflow` pair (one agent node per completed turn, transcript in `metadata`, secret/signature exclusion structural) — leaving only the **1.AA** chat-regression harness ‖ the 1.m6 multimodal sub-spine; **Phase 2 (CLI, M3) is unblocked**.
 Phase 0 (M0, 2026-06-04) landed the monorepo, strict toolchain + CI, `@relavium/shared` (the
 full Zod contract set), the no-vendor-type seam fence, and `@relavium/db`. Phase 1 has since
 landed `@relavium/llm` — the `LLMProvider` seam + all three adapters (Anthropic, OpenAI/DeepSeek,
@@ -62,9 +62,9 @@ re-delivery and a `workflow_mismatch` identity guard, and the `human_in_the_loop
 plus the one-shot `setTimer` timeout port — `approve` auto-resolves, `reject` fails with `run_timeout`).
 The pre-egress budget governor (1.AC) + the agent-first `AgentSession` (1.V) landed together (PR #26)
 **completing 1.m4**; then the end-to-end Node harness (1.U) landed (PR #27, 2026-06-16) **reaching M2** —
-the Phase-1 engine critical path is complete. Active work is now the additive Lane-C sub-spine (session
-events **1.W ✅ Done (PR #28)** + persistence **1.X ✅ Done (PR #29, 2026-06-17)**; 1.Y/1.Z/1.AA next) and
-the multimodal sub-spine; Phase 2 (CLI) is unblocked. See
+the Phase-1 engine critical path is complete. The additive Lane-C agent-first sub-spine is now **complete**
+(session events **1.W ✅ (PR #28)** + persistence **1.X ✅ (PR #29)** + checkpoint/resume **1.Y** & export **1.Z ✅ (PR #30, 2026-06-17)** + the **1.AA** chat-regression harness ✅ (2026-06-17), closing **1.m5**);
+remaining Phase-1 work is the 1.m6 multimodal sub-spine; Phase 2 (CLI) is unblocked. See
 [docs/roadmap/current.md](docs/roadmap/current.md). See [README.md](README.md) for the public overview.
 
 ## Non-negotiable rules for AI agents

README.md

@@ -52,6 +52,6 @@ both landed in **PR #26 (2026-06-16)**. With the budget governor in, **milestone
 **end-to-end Node harness** (1.U) landed (**PR #27, 2026-06-16**) — **🎯 reaching milestone M2**: the engine runs
 end-to-end (live streaming + checkpoint + cross-process resume + retry + provider failover), completing the
 Phase-1 engine critical path. The remaining Phase-1 work is additive (the agent-first sub-spine — **session
-events 1.W ✅ (PR #28)** + **persistence 1.X ✅ (PR #29, 2026-06-17)**, 1.Y/1.Z/1.AA next … — and the
+events 1.W ✅ (PR #28)** + **persistence 1.X ✅ (PR #29)** + **session checkpoint/resume 1.Y & export-to-workflow 1.Z ✅ (PR #30, 2026-06-17)** + **the 1.AA chat-regression harness ✅ (2026-06-17)**, completing **1.m5** — and the
 multimodal sub-spine); **Phase 2 (the CLI) is unblocked**. See
 [docs/roadmap/current.md](docs/roadmap/current.md) for live status.