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Tasks 2.1 + 2.2 + 2.3 of the safe-shutdown plan — the reversible
quiesce-without-restart machinery NAS drives during a lifecycle action (D4a).
These ship together because the endpoint, the control channel, and the gateway
state machine are one coherent slice.
2.2 — control channel (gateway/drain_control.py, new):
The dashboard has no HTTP path into a running gateway (guardrails: "there is NO
external control channel into a running gateway"); restart/drain is driven only
by markers the gateway reacts to. So begin/cancel-drain writes/removes a
presence-based marker .drain_request.json (HERMES_HOME-scoped, atomic write,
never-raises read; a corrupt marker reads as present-contentless → fail-safe
toward quiescing). This is Q-B option A.
2.2 — gateway state machine (gateway/run.py):
- _external_drain_active flag, DISTINCT from the shutdown _draining flag: this
one does NOT exit the process and is fully reversible.
- _enter_external_drain / _exit_external_drain: idempotent transitions that
flip gateway_state→draining / →running via _update_runtime_status (preserving
the live active_agents count). exit refuses to revert to running during a
real shutdown or after the loop stops (shutdown wins).
- _drain_control_watcher: 1s background task (modelled on _handoff_watcher)
reconciling accept-state with the marker; honours a marker that survived a
restart on its first tick. Registered alongside the other watchers in start.
- New-turn accept gate in _handle_message, placed BEFORE the session-slot
claim: when draining, refuse to START a new turn (so active_agents can only
fall → no TOCTOU race), while in-flight turns finish untouched. Internal/
system events (restart-recovery replays, bg-process completions) bypass it.
2.1 — endpoint (hermes_cli/web_server.py):
POST /api/gateway/drain {action: drain|cancel}. Authenticated by the Task-2.0a
token seam (the drain plugin registered this exact path as a token route);
attributes the request to the verified token principal. Begin writes the
marker, cancel removes it — the gateway process owns the actual transition.
Force-override (D6) is NOT here; it maps onto the existing immediate
/api/gateway/restart force path.
Tests (mocked — necessary-not-sufficient; the HARD live gate Q-B is next):
- tests/gateway/test_external_drain_control.py — marker contract (write/clear/
read/corrupt/atomic), state machine (enter/exit/idempotency/shutdown-wins/
loop-stopped), watcher reconcile-enter-then-exit, new-turn refusal, and
in-flight-not-interrupted. 15 tests.
- tests/hermes_cli/test_web_server.py — /api/gateway/drain begin/default-begin/
cancel/cancel-idempotent/bad-action-400. 6 tests.
- dashboard.drain_auth config section already added in 2.0b commit.
All touched suites green: 301 (gateway+auth) + 9 (web_server endpoints) passed.
Intentionally deferred:
- HARD live-validation gate (Q-B): real isolated `hermes gateway run`, drive a
real begin-drain marker, prove the 5-point checklist a–e.
- Spec-doc status flip + Phase-2 PR.
Build status: external-drain, restart-drain, status, dashboard-auth, drain-plugin,
token-auth, and web_server-endpoint suites green.
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| .. | ||
| acp | ||
| acp_adapter | ||
| agent | ||
| cli | ||
| cron | ||
| docker | ||
| e2e | ||
| fakes | ||
| fixtures/plugins/example-dashboard/dashboard | ||
| gateway | ||
| hermes_cli | ||
| hermes_state | ||
| honcho_plugin | ||
| integration | ||
| openviking_plugin | ||
| plugins | ||
| providers | ||
| run_agent | ||
| scripts | ||
| skills | ||
| stress | ||
| tools | ||
| tui_gateway | ||
| website | ||
| __init__.py | ||
| conftest.py | ||
| run_interrupt_test.py | ||
| test_account_usage.py | ||
| test_assistant_ui_tap_compat.py | ||
| test_atomic_replace_symlinks.py | ||
| test_base_url_hostname.py | ||
| test_batch_runner_checkpoint.py | ||
| test_bitwarden_secrets.py | ||
| test_cli_file_drop.py | ||
| test_cli_manual_compress.py | ||
| test_cli_skin_integration.py | ||
| test_ctx_halving_fix.py | ||
| test_dashboard_sidecar_close_on_disconnect.py | ||
| test_delegate_cascade_49148.py | ||
| test_desktop_electron_pin.py | ||
| test_desktop_mac_entitlements.py | ||
| test_dispatch_session_id.py | ||
| test_docker_home_override_scripts.py | ||
| test_docker_stage2_browser_discovery.py | ||
| test_docker_webui_install_surface.py | ||
| test_dockerfile_tini_compat_shim.py | ||
| test_empty_model_fallback.py | ||
| test_empty_session_hygiene.py | ||
| test_env_loader_secret_sources.py | ||
| test_evidence_store.py | ||
| test_gateway_streaming_nested_config.py | ||
| test_get_tool_definitions_cache_isolation.py | ||
| test_hermes_bootstrap.py | ||
| test_hermes_constants.py | ||
| test_hermes_home_profile_warning.py | ||
| test_hermes_logging.py | ||
| test_hermes_state.py | ||
| test_hermes_state_compression_locks.py | ||
| test_hermes_state_wal_fallback.py | ||
| test_honcho_client_concurrency.py | ||
| test_honcho_client_config.py | ||
| test_honcho_session_context.py | ||
| test_honcho_startup_fail_open.py | ||
| test_install_no_initial_commit.py | ||
| test_install_ps1_native_stderr_eap.py | ||
| test_install_ps1_uv_powershell_host.py | ||
| test_install_sh_browser_install.py | ||
| test_install_sh_install_method_stamp.py | ||
| test_install_sh_node_global_prefix.py | ||
| test_install_sh_pythonpath_sanitization.py | ||
| test_install_sh_root_fhs_uv_python_path.py | ||
| test_install_sh_setup_wizard_tty_probe.py | ||
| test_install_sh_symlink_stomp.py | ||
| test_install_sh_termux_network_prereqs.py | ||
| test_install_unmerged_index.py | ||
| test_ipv4_preference.py | ||
| test_lazy_session_regressions.py | ||
| test_lint_config.py | ||
| test_live_system_guard_self_test.py | ||
| test_mcp_serve.py | ||
| test_mini_swe_runner.py | ||
| test_minimax_model_validation.py | ||
| test_minimax_oauth.py | ||
| test_minisweagent_path.py | ||
| test_model_forces_max_completion_tokens.py | ||
| test_model_picker_scroll.py | ||
| test_model_tools.py | ||
| test_model_tools_async_bridge.py | ||
| test_ollama_num_ctx.py | ||
| test_output_cap_parsing.py | ||
| test_package_json_lazy_deps.py | ||
| test_packaging_metadata.py | ||
| test_plugin_skills.py | ||
| test_plugin_utils.py | ||
| test_process_loop_event_loop_warning.py | ||
| test_project_metadata.py | ||
| test_retry_utils.py | ||
| test_run_tests_parallel.py | ||
| test_sanitize_tool_error.py | ||
| test_slash_worker_watchdog.py | ||
| test_sql_injection.py | ||
| test_state_db_malformed_repair.py | ||
| test_subprocess_home_isolation.py | ||
| test_termux_all_extra_compat.py | ||
| test_timezone.py | ||
| test_toolset_distributions.py | ||
| test_toolsets.py | ||
| test_trajectory_compressor.py | ||
| test_trajectory_compressor_async.py | ||
| test_transform_llm_output_hook.py | ||
| test_transform_tool_result_hook.py | ||
| test_tui_gateway_server.py | ||
| test_tui_gateway_ws.py | ||
| test_tui_mcp_late_refresh.py | ||
| test_utils_truthy_values.py | ||
| test_web_server.py | ||
| test_wheel_locales_e2e.py | ||
| test_yuanbao_integration.py | ||
| test_yuanbao_markdown.py | ||
| test_yuanbao_pipeline.py | ||
| test_yuanbao_proto.py | ||
| test_yuanbao_shutdown.py | ||