Allow Codex Ask AI outside git repos

[ericclemmons]

Summary

• detect whether the Codex Ask AI working directory is inside a Git worktree

• pass Codex SDK skipGitRepoCheck only for standalone/non-repo sessions

  

• keep the default Codex git repo safety check for repo-backed review sessions

Validation

• npx -p typescript tsc --noEmit -p packages/ai/tsconfig.json
• npx -p tsx tsx -e "import { shouldSkipGitRepoCheck } from './packages/ai/providers/codex-sdk.ts'; if (shouldSkipGitRepoCheck(process.cwd())) throw new Error('repo cwd should not skip'); if (!shouldSkipGitRepoCheck('/Users/eric/Documents/Codex/2026-06-24/does')) throw new Error('plain Codex session should skip'); console.log('ok')"

Note: full bun test was not run locally because bun is not installed in this environment and the one-off runner could not resolve the repo workspace DOM test setup.