refactor(#747): de-hardcode interaction coordination names

packages/mosaic/src/commands/fleet.spec.ts

@@ -189,6 +189,36 @@ describe('fleet roster parsing', () => {
     expect(getRosterAgent(roster, 'canary-pi').runtime).toBe('pi');
   });
 
+  it('accepts optional agent alias and provider metadata without requiring them', async () => {
+    cleanup = await tempDir();
+    const rosterPath = join(cleanup, 'roster.yaml');
+    await writeFile(
+      rosterPath,
+      [
+        'version: 1',
+        'transport: tmux',
+        'agents:',
+        '  - name: interaction',
+        '    alias: Friday',
+        '    provider: openai-codex',
+        '    runtime: pi',
+        '  - name: worker0',
+        '    runtime: codex',
+      ].join('\n'),
+    );
+
+    const roster = await loadFleetRoster(rosterPath);
+
+    expect(getRosterAgent(roster, 'interaction')).toMatchObject({
+      name: 'interaction',
+      alias: 'Friday',
+      provider: 'openai-codex',
+    });
+    expect(getRosterAgent(roster, 'worker0')).toMatchObject({ name: 'worker0' });
+    expect(getRosterAgent(roster, 'worker0').alias).toBeUndefined();
+    expect(getRosterAgent(roster, 'worker0').provider).toBeUndefined();
+  });
+
   it('socketArgs: named socket → -L <name>; empty → no -L (default socket)', () => {
     expect(socketArgs('mosaic-fleet')).toEqual(['-L', 'mosaic-fleet']);
     expect(socketArgs('')).toEqual([]);
@@ -1872,7 +1902,61 @@ describe('fleet ps — tenant and host', () => {
   });
 });
 
-describe('fleet ps — JSON output shape (FR-6)', () => {
+describe('fleet ps — aliases and JSON output shape (FR-6)', () => {
+  it('shows an agent alias in table output and falls back to name when absent', async () => {
+    const home = await mkdtemp(join(tmpdir(), 'mosaic-fleet-'));
+    const rosterPath = join(home, 'fleet', 'roster.yaml');
+    await mkdir(join(home, 'fleet'), { recursive: true });
+    await writeFile(
+      rosterPath,
+      [
+        'version: 1',
+        'transport: tmux',
+        'agents:',
+        '  - name: interaction',
+        '    alias: Friday',
+        '    runtime: pi',
+        '  - name: worker0',
+        '    runtime: codex',
+      ].join('\n'),
+    );
+
+    const runner: CommandRunner = async (command, args) => {
+      const fullArgs = [command, ...args].join(' ');
+      if (fullArgs.includes('list-sessions')) {
+        return { stdout: 'interaction\nworker0\n', stderr: '', exitCode: 0 };
+      }
+      return {
+        stdout: fullArgs.includes('systemctl')
+          ? 'ActiveState=active\nSubState=running\nUnitFileState=enabled\n'
+          : '12345 pi 0 0 0 0\n',
+        stderr: '',
+        exitCode: 0,
+      };
+    };
+
+    const lines: string[] = [];
+    const origLog = console.log;
+    console.log = (msg: string) => {
+      lines.push(msg);
+    };
+
+    const program = new Command();
+    program.exitOverride();
+    registerFleetCommand(program, { runner, mosaicHome: home });
+
+    try {
+      await program.parseAsync(['node', 'mosaic', 'fleet', 'ps']);
+    } finally {
+      console.log = origLog;
+      await rm(home, { recursive: true, force: true });
+    }
+
+    const output = lines.join('\n');
+    expect(output).toContain('Friday');
+    expect(output).toContain('worker0');
+  });
+
   it('produces --json records including tenant_id and host for each agent', async () => {
     const home = await mkdtemp(join(tmpdir(), 'mosaic-fleet-'));
     const rosterPath = join(home, 'fleet', 'roster.yaml');