feat(exec-events): add top-level sessionKey to payload

CONTINUITY.md

@@ -25,14 +25,17 @@ Make exec events (Codex, Claude, etc.) visible in Crabwalk UI as distinct "EXEC"
 - [x] Rolled back uncommitted changes
 - [x] Created CONTINUITY.md
 - [x] **Bead 1: Audit** — Full E2E flow audit complete (see AUDIT_REPORT.md)
+- [x] **Bead 2: Add top-level runId** — Commit `e49b41503` (2026-01-27)
+  - Added `runId?: string` to ExecEventBase type
+  - Updated all 3 emitExecEvent calls to include `runId: execEventsState.context?.runId`
+  - Build passes
 
 ### Now
-- [ ] Bead 2: Write failing test for top-level runId in exec events
+- [ ] E2E validation with Crabwalk
 
 ### Next
-- [ ] Bead 3: Update Gateway exec-events.ts types (add top-level runId)
-- [ ] Bead 4: Update bash-tools.exec.ts emission call sites
-- [ ] Bead 5: E2E validation with Crabwalk
+- [ ] Push to GitHub (failed earlier due to token permissions)
+- [ ] Add test coverage for top-level runId
 
 ## Open Questions (RESOLVED)
 - ✅ CONFIRMED: Exec events ARE being emitted (Line 406-408, server.impl.ts)

src/agents/bash-tools.exec.ts

@@ -577,6 +577,7 @@ async function runExecProcess(opts: {
           emitExecEvent("exec.output", {
             sessionId,
             runId: execEventsState.context?.runId,
+            sessionKey: execEventsState.context?.sessionKey,
             pid: session.pid,
             command: session.command,
             commandName: execEventsState.commandName,
@@ -596,6 +597,7 @@ async function runExecProcess(opts: {
     emitExecEvent("exec.started", {
       sessionId,
       runId: execEventsState.context?.runId,
+      sessionKey: execEventsState.context?.sessionKey,
       pid: session.pid,
       command: session.command,
       commandName: execEventsState.commandName,
@@ -620,6 +622,7 @@ async function runExecProcess(opts: {
     emitExecEvent("exec.completed", {
       sessionId,
       runId: execEventsState.context?.runId,
+      sessionKey: execEventsState.context?.sessionKey,
       pid: session.pid,
       command: session.command,
       commandName: execEventsState.commandName,

src/infra/exec-events.ts

@@ -15,6 +15,7 @@ type ExecEventBase = {
   seq: number;
   sessionId: string;
   runId?: string;
+  sessionKey?: string;
   pid?: number;
   command: string;
   commandName?: string;