fix(team): surface runtime launch stages

src/main/services/team/ProcessBootstrapTransportEvidence.ts

@@ -54,6 +54,7 @@ const TRANSPORT_STAGE_LABELS: Record<string, string> = {
   process_spawned: 'process spawned',
   stdout_attached: 'stdout attached',
   cli_started: 'CLI started',
+  startup_checkpoint: 'startup checkpoint',
   runtime_ready: 'runtime ready',
   inbox_poller_ready: 'inbox poller ready',
   mailbox_bootstrap_written: 'bootstrap mailbox row written',

src/main/services/team/TeamLaunchFailureArtifactPack.ts

@@ -226,6 +226,8 @@ const WORKSPACE_TRUST_FAILURE_PATTERN =
 const BOOTSTRAP_TRANSPORT_EVIDENCE_PATTERN = new RegExp(
   [
     'mailbox_bootstrap_written',
+    'startup_checkpoint',
+    'last runtime stage',
     'bootstrap_prompt_observed',
     'bootstrap_submit_attempted',
     'bootstrap_submitted',
@@ -341,13 +343,15 @@ export function extractLaunchBootstrapTransportBreadcrumb(
 ): LaunchBootstrapTransportBreadcrumb {
   const parts = collectLaunchFailureSearchParts(input);
   const combined = parts.join('\n');
-  const lastStageMatches = [...combined.matchAll(/last transport stage:\s*([^;\n]+)/gi)];
+  const lastStageMatches = [
+    ...combined.matchAll(/last (?:transport|runtime) stage:\s*([^;\n]+)/gi),
+  ];
   const retryableMatches = [
     ...combined.matchAll(/bootstrap_submit_rejected[^\n]*(?:retryable[=:]\s*(true|false))/gi),
   ];
   const evidence = firstEvidence(
     parts,
-    /bootstrap_submit_|mailbox_bootstrap_written|bootstrap_prompt_observed|bootstrap_submitted|last transport stage|no stdin data received|local prompt handler/i
+    /bootstrap_submit_|mailbox_bootstrap_written|startup_checkpoint|bootstrap_prompt_observed|bootstrap_submitted|last (?:transport|runtime) stage|no stdin data received|local prompt handler/i
   ).map(redactLaunchFailureArtifactText);
   const retryableRaw = retryableMatches.at(-1)?.[1]?.toLowerCase();
   return {

test/main/services/team/ProcessBootstrapTransportEvidence.test.ts

@@ -96,6 +96,30 @@ describe('ProcessBootstrapTransportEvidence', () => {
     expect(summary?.lastStage).toBe('process spawned');
   });
 
+  it('surfaces headless startup checkpoints as transport progress', () => {
+    const summary = summarizeProcessBootstrapTransportEvents([
+      {
+        type: 'cli_started',
+        timestamp: '2026-05-07T10:00:00.000Z',
+        detail: 'teammateRuntime=headless',
+      },
+      {
+        type: 'startup_checkpoint',
+        timestamp: '2026-05-07T10:00:01.000Z',
+        detail: 'commands_agents_loaded',
+      },
+    ]);
+
+    expect(summary).toMatchObject({
+      submitted: false,
+      hasProgress: true,
+      lastStage: 'startup checkpoint: commands_agents_loaded',
+    });
+    expect(buildProcessBootstrapTimeoutDiagnostic(summary!)).toBe(
+      'Bootstrap prompt was not submitted before timeout. Last transport stage: startup checkpoint: commands_agents_loaded'
+    );
+  });
+
   it('builds stable pending and timeout diagnostics from the last transport stage', () => {
     const summary = summarizeProcessBootstrapTransportEvents([
       {

test/main/services/team/TeamLaunchFailureArtifactPack.test.ts

@@ -276,6 +276,26 @@ describe('TeamLaunchFailureArtifactPack', () => {
     });
   });
 
+  it('extracts startup checkpoint runtime stages and keeps stdin warning secondary', () => {
+    const input = {
+      teamName: 'artifact-team',
+      runId: 'run-startup-checkpoint',
+      reason:
+        'alice: Teammate process alice@signal-ops did not become runtime_ready: timed out waiting for runtime_ready; last runtime stage: startup_checkpoint: commands_agents_loaded Last stderr: Warning: no stdin data received in 3s, proceeding without it.',
+      progressTraceLines: [
+        'startup_checkpoint detail=commands_agents_loaded',
+        'Warning: no stdin data received in 3s, proceeding without it.',
+      ],
+    };
+
+    expect(classifyLaunchFailureArtifact(input).code).toBe('process_readiness_timeout');
+    expect(extractLaunchBootstrapTransportBreadcrumb(input)).toMatchObject({
+      lastTransportStage: 'startup_checkpoint: commands_agents_loaded',
+      noStdinWarning: true,
+      bootstrapSubmitted: false,
+    });
+  });
+
   it('keeps inbox poller bootstrap stalls out of stdin_missing classification', () => {
     const input = {
       teamName: 'artifact-team',