Add Codex clear and compact slash commands (#541)

* Add Codex clear and compact slash commands

* Stabilize queued thinking event test

* Interrupt active Codex turn before slash commands

cli/src/modules/common/slashCommands.test.ts

@@ -114,6 +114,8 @@ describe('listSlashCommands', () => {
         const commands = await listSlashCommands('codex', projectDir)
 
         expect(commands.map((command) => command.name)).toEqual(expect.arrayContaining([
+            'clear',
+            'compact',
             'plan',
             'status',
             'model',
@@ -122,6 +124,21 @@ describe('listSlashCommands', () => {
         ]))
     })
 
+    it('lets project codex prompts override same-name built-ins', async () => {
+        await writeFile(
+            join(projectDir, '.codex', 'prompts', 'clear.md'),
+            ['---', 'description: Project clear', '---', '', 'Project clear prompt'].join('\n')
+        )
+
+        const commands = await listSlashCommands('codex', projectDir)
+        const clearCommands = commands.filter(cmd => cmd.name === 'clear')
+
+        expect(clearCommands).toHaveLength(1)
+        expect(clearCommands[0]?.source).toBe('project')
+        expect(clearCommands[0]?.description).toBe('Project clear')
+        expect(clearCommands[0]?.content).toBe('Project clear prompt')
+    })
+
     it('loads Codex global and project prompts', async () => {
         await writeFile(
             join(codexHome, 'prompts', 'global-prompt.md'),

cli/src/modules/common/slashCommands.ts

@@ -33,6 +33,8 @@ const BUILTIN_COMMANDS: Record<string, SlashCommand[]> = {
         { name: 'plan', description: 'Toggle plan mode', source: 'builtin' },
     ],
     codex: [
+        { name: 'clear', description: 'Clear current Codex thread context', source: 'builtin' },
+        { name: 'compact', description: 'Compact current Codex thread context', source: 'builtin' },
         { name: 'help', description: 'Show supported HAPI Codex slash commands', source: 'builtin' },
         { name: 'plan', description: 'Enable plan mode; use /plan off to return to default', source: 'builtin' },
         { name: 'default', description: 'Return Codex collaboration mode to default', source: 'builtin' },