End-to-end tests for the entire CLI against real agents (Claude Code, Gemini CLI, OpenCode, Cursor, Factory AI Droid, Copilot CLI).

mise run test:e2e [filter]                          # run filtered (or omit filter for all agents)
mise run test:e2e --agent claude-code [filter]       # Claude Code only
mise run test:e2e --agent gemini-cli [filter]        # Gemini CLI only
mise run test:e2e --agent opencode [filter]          # OpenCode only
mise run test:e2e --agent cursor [filter]            # Cursor only
mise run test:e2e --agent factoryai-droid [filter]   # Factory AI Droid only
mise run test:e2e --agent copilot-cli [filter]       # Copilot CLI only
go build ./...                                      # compile check (no agent CLI needed)

Do NOT run E2E tests proactively. They make real API calls that consume tokens and cost money. Only run when explicitly asked.

e2e/
├── agents/       # Agent abstraction (Agent interface, tmux sessions, concurrency gates)
├── bootstrap/    # CI pre-test setup (auth config, warmup)
├── entire/       # `entire` CLI wrapper (enable, rewind, etc.)
├── exploratory/  # Experimental tests, not run by CI
├── tests/        # Blessed test files (run by CI)
└── testutil/     # Repo setup, assertions, artifact capture

• Every test uses testutil.ForEachAgent which runs it per registered agent with repo setup, concurrency gating, and timeout scaling.
• All operations go through RepoState (s.RunPrompt, s.Git) so they're logged to console.log.
• Use the entire package for CLI interactions, not raw exec.Command.
• Skip tests pending CLI fixes with t.Skip("ENT-XXX: reason").

1. Create agents/<name>.go implementing the Agent interface.
2. Register it in init() with Register(&YourAgent{}).
3. Add a Bootstrap() method for any CI-specific setup (auth config, warmup).
4. Add a RegisterGate("<name>", N) call if concurrency needs limiting.
5. Ensure the agent name is accepted by mise run test:e2e --agent <name>.
6. Add the agent to .github/workflows/e2e.yml matrix and e2e-isolated.yml options.

Artifacts are captured to e2e/artifacts/ on every run (git-log, git-tree, console.log, checkpoint metadata, entire logs). Set E2E_KEEP_REPOS=1 to preserve the temp repo — a symlink appears in the artifact dir pointing to it.

Use the debug-e2e skill (.claude/skills/debug-e2e/) for a structured workflow when investigating failures.

• console.log — full operation transcript including agent stdout/stderr
• git-log.txt — commit history at time of failure
• git-tree.txt — working tree state
• entire-logs/ — internal CLI logs

When a test passes on retry but failed once, the problem is usually agent non-determinism, not a CLI bug. Common patterns:

• Agent asked for confirmation instead of acting: The model output contains "Does this look right?" or "Should I proceed?". Fix: append "Do not ask for confirmation, just make the change." to the prompt.
• Agent wrote to wrong path or created extra files: Fix: be more explicit about exact file paths and what not to do.
• Agent committed when it shouldn't have: Fix: add "Do not commit" to the prompt.
• Checkpoint wait timeout: WaitForCheckpoint or WaitForCheckpointAdvanceFrom exceeded deadline. Fix: increase the timeout argument.

To diagnose: read console.log in the failing test's artifact directory. Compare what the agent actually did vs what the test expected.

• .github/workflows/e2e.yml — Runs full suite on push to main. Matrix: [claude-code, opencode, gemini-cli, cursor-cli, factoryai-droid, copilot-cli].
• .github/workflows/e2e-isolated.yml — Manual dispatch for debugging a single test. Inputs: agent + test name filter.

Both workflows run go run ./e2e/bootstrap before tests to handle agent-specific CI setup (auth config, warmup).