test(boot): keep required fixture failures fatal

apps/cli/tests/profiles/headless/tests/session-format-guard.expected.e2e.ts

@@ -32,6 +32,10 @@ const binScript = fileURLToPath(new URL('../../../../../../packages/test-support
 const tsconfigPath = fileURLToPath(new URL('../../../../../../tsconfig.json', import.meta.url))
 // The resumed-agent fixture in the shared config resumes exactly this id.
 const sessionId = SessionId('workspace-context-resume')
+const fixtureEnv = {
+  DSH_SNAPSHOT_FILE: replayFixture,
+  DSH_LOADER_SMOKE_REQUIRED_ENTRY_ID: 'resumed-agent',
+}
 
 /** Persist one session with the given header version and events, returning its log path. */
 async function seedSession(root: string, cwd: string, version: number, events: SessionEvent[]): Promise<string> {
@@ -84,7 +88,7 @@ describe('session format guard through the assembled app', () => {
       configPath,
       binArgs: [configPath, 'Continue the migrated session.'],
       tsconfigPath,
-      env: { DSH_SNAPSHOT_FILE: replayFixture },
+      env: fixtureEnv,
       prepare: async (runCwd) => {
         sourcePath = await seedSession(join(runCwd, '.sessions'), runCwd, 0, closedTurn())
         source = await readFile(sourcePath)
@@ -124,7 +128,7 @@ describe('session format guard through the assembled app', () => {
       configPath,
       binArgs: [configPath, 'Try to resume.'],
       tsconfigPath,
-      env: { DSH_SNAPSHOT_FILE: replayFixture },
+      env: fixtureEnv,
       expectedExitCode: 1,
       prepare: async (runCwd) => {
         sessionPath = await seedSession(join(runCwd, '.sessions'), runCwd, SESSION_FORMAT_VERSION + 99, closedTurn())
@@ -151,7 +155,7 @@ describe('session format guard through the assembled app', () => {
       configPath,
       binArgs: [configPath, 'Try to resume.'],
       tsconfigPath,
-      env: { DSH_SNAPSHOT_FILE: replayFixture },
+      env: fixtureEnv,
       expectedExitCode: 1,
       prepare: async (runCwd) => {
         sourcePath = generationLogPath(join(runCwd, '.sessions'), runCwd, sessionId, 2, 'none')
@@ -197,7 +201,7 @@ describe('session format guard through the assembled app', () => {
       configPath,
       binArgs: [configPath, 'Try to resume.'],
       tsconfigPath,
-      env: { DSH_SNAPSHOT_FILE: replayFixture },
+      env: fixtureEnv,
       expectedExitCode: 1,
       prepare: async (runCwd) => {
         sessionPath = await seedSession(join(runCwd, '.sessions'), runCwd, SESSION_FORMAT_VERSION, [

packages/test-support/loader-smoke/tests/fixtures/headless-driver.ts

@@ -8,6 +8,8 @@ import type { SessionEvent } from '@deepseek-ai/dsh-session'
 import { bootProductionProfile } from './production-profile.ts'
 
 const NAME = 'headless-test-driver'
+const REQUIRED_ENTRY_ENV = 'DSH_LOADER_SMOKE_REQUIRED_ENTRY_ID'
+const FIBER_ACTIVE = 2
 const [configPath, ...taskParts] = process.argv.slice(2)
 if (configPath === undefined || taskParts.length === 0 || taskParts.every(part => part.trim() === '')) {
   throw new Error(`${NAME}: expected <config-path> <task...>`)
@@ -22,6 +24,16 @@ try {
     profile: 'headless',
     overlayPaths: [resolveConfigPath(configPath, undefined)],
   })
+  const requiredEntryId = process.env[REQUIRED_ENTRY_ENV]
+  if (requiredEntryId !== undefined) {
+    const entry = [...ctx.loader.entries()].find(candidate => candidate.options.id === requiredEntryId)
+    if (entry === undefined) throw new Error(`${NAME}: required fixture entry not found: ${requiredEntryId}`)
+    if (entry.fiber === undefined) throw new Error(`${NAME}: required fixture entry failed to import: ${requiredEntryId}`)
+    await entry.fiber.await()
+    if (entry.fiber.state !== FIBER_ACTIVE) {
+      throw new Error(`${NAME}: required fixture entry did not activate: ${requiredEntryId}`)
+    }
+  }
   const result = await runFixtureTurn(ctx, {
     task: taskParts.join(' '),
     onEvent: (sessionId: string, event: SessionEvent) => {