test(fleet): make CRUD projection recovery deterministic

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

packages/mosaic/src/commands/fleet-agent-crud-command.spec.ts

@@ -4,7 +4,6 @@ import { join } from 'node:path';
 import { Command } from 'commander';
 import { afterEach, describe, expect, it, vi } from 'vitest';
 import { fleetAgentMutationExitCode } from './fleet-agent-crud-command.js';
-import { applyPreparedAgentEnvironmentProjection } from '../fleet/generated-env-boundary.js';
 import { registerFleetCommand, type FleetCommandDeps } from './fleet.js';
 
 const roster = `
@@ -389,25 +388,20 @@ describe('mosaic fleet local roster mutations', (): void => {
     const agentsDir = join(home, 'fleet', 'agents');
     const captured = output();
 
-    try {
-      await program(home, {
-        projectionApplier: async (prepared): Promise<unknown> => {
-          await chmod(agentsDir, 0o500);
-          return applyPreparedAgentEnvironmentProjection(prepared);
-        },
-      }).parseAsync([
-        'node',
-        'mosaic',
-        'fleet',
-        'create',
-        '--expected-generation',
-        '7',
-        '--agent',
-        JSON.stringify(agent),
-      ]);
-    } finally {
-      await chmod(agentsDir, 0o700);
-    }
+    await program(home, {
+      projectionApplier: async (): Promise<never> => {
+        throw new Error('injected projection failure');
+      },
+    }).parseAsync([
+      'node',
+      'mosaic',
+      'fleet',
+      'create',
+      '--expected-generation',
+      '7',
+      '--agent',
+      JSON.stringify(agent),
+    ]);
 
     expect(JSON.parse(captured.lines.join('\n'))).toMatchObject({
       applied: false,
@@ -525,17 +519,12 @@ describe('mosaic fleet local roster mutations', (): void => {
       JSON.stringify(agent),
     ]);
 
-    try {
-      captured.lines.length = 0;
-      await program(home, {
-        projectionApplier: async (prepared): Promise<unknown> => {
-          await chmod(agentsDir, 0o500);
-          return applyPreparedAgentEnvironmentProjection(prepared);
-        },
-      }).parseAsync(['node', 'mosaic', 'fleet', 'delete', 'coder0', '--expected-generation', '8']);
-    } finally {
-      await chmod(agentsDir, 0o700);
-    }
+    captured.lines.length = 0;
+    await program(home, {
+      projectionApplier: async (): Promise<never> => {
+        throw new Error('injected projection failure');
+      },
+    }).parseAsync(['node', 'mosaic', 'fleet', 'delete', 'coder0', '--expected-generation', '8']);
 
     expect(JSON.parse(captured.lines.pop() ?? '')).toMatchObject({
       applied: false,