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## What does this PR do?
Closes a critical hole in the hardline command floor. HARDLINE_PATTERNS is
the unconditional last line of defense: detect_hardline_command runs BEFORE
every yolo / approvals.mode=off / cron approve-mode bypass, so it is the only
gate standing between the agent (or a prompt-injected instruction) and an
irrecoverable disk wipe. The three rm rules anchored on a bare path token,
and _normalize_command_for_detection never strips shell quotes — so the
ordinary, recommended shell idioms slipped straight through:
rm -rf "/" rm -rf '/' rm -rf "/etc"
rm -rf "$HOME" rm -rf ${HOME} rm -rf "${HOME}"
All of these returned NO hardline match. A leading quote pushes the path out
of reach of the flag group, a trailing quote breaks the `(\s|$)` terminator,
and the `${HOME}` brace form was never listed at all. Under --yolo,
approvals.mode=off, or cron approve-mode the dangerous-command layer is also
skipped, so these commands reached execution with zero gate — exactly the
unrecoverable data loss the floor is documented to make impossible. Because
quoting paths and `${HOME}` are normal shell usage, not exotic obfuscation,
this is a high-severity, easily-triggered bypass.
The fix makes the rm path matcher quote- and brace-tolerant while staying
conservative: a path is matched when it is either fully wrapped in its own
matching quote pair (`"/"`) or bare with a whitespace/end terminator. The
matching-quote requirement is deliberate so the change adds no new false
positives — a dangerous-looking string that is merely an argument to another
command (e.g. `git commit -m "rm -rf /"`) has a closing quote but no opening
quote of its own around the path, so neither branch fires.
## Related Issue
N/A
## Type of Change
- [x] 🔒 Security fix
## Changes Made
- `tools/approval.py`: added `_hardline_rm_path()` (matches a destructive
path either fully quoted or bare-with-terminator), factored the protected
system-dir list into `_HARDLINE_SYSTEM_DIRS` and the rm flag prefix into
`_RM_FLAG_PREFIX`, and rebuilt the three rm `HARDLINE_PATTERNS` on top of
them, adding the `${HOME}` brace form. Kept as plain concatenation so regex
backslashes never land inside an f-string field (Python 3.11 floor).
- `tests/tools/test_hardline_blocklist.py`: added quoted (`"/"`, `'/'`,
`"/etc"`, `"$HOME"`, ...) and brace (`${HOME}`, `"${HOME}"`) cases to the
must-block set, a dedicated `_QUOTED_BRACE_BYPASS` regression parametrization,
no-false-positive guards (`git commit -m "rm -rf /"`), and extended the
yolo-cannot-bypass integration test to cover the quoted/brace forms.
## How to Test
1. Reproduce the bypass on `main`: `detect_hardline_command('rm -rf "/"')`
returns `(False, None)` — the floor lets it through.
2. With this change it returns `(True, "recursive delete of root filesystem")`;
the same holds for `'/'`, `"/etc"`, `"$HOME"`, `${HOME}`, `"${HOME}"`.
3. Run the suite: `scripts/run_tests.sh tests/tools/test_hardline_blocklist.py`
— 125 passed, including the new bypass and no-false-positive cases.
## Checklist
### Code
- [x] I've read the Contributing Guide
- [x] My commit messages follow Conventional Commits (`fix(scope):`, etc.)
- [x] I searched for existing PRs to make sure this isn't a duplicate
- [x] My PR contains **only** changes related to this fix (no unrelated commits)
- [x] I've run the relevant tests and they pass
- [x] I've added tests for my changes (required for bug fixes)
- [x] I've tested on my platform: macOS 15 (Darwin 25.5)
### Documentation & Housekeeping
- [x] I've updated relevant documentation (README, `docs/`, docstrings) — or N/A
- [x] I've updated `cli-config.yaml.example` if I added/changed config keys — or N/A
- [x] I've updated `CONTRIBUTING.md` or `AGENTS.md` if I changed architecture or workflows — or N/A
- [x] I've considered cross-platform impact (Windows, macOS) — pattern-only change, ruff + footgun gate pass
- [x] I've updated tool descriptions/schemas if I changed tool behavior — or N/A
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|---|---|---|
| .. | ||
| acp | ||
| acp_adapter | ||
| agent | ||
| ci | ||
| cli | ||
| computer_use | ||
| 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_code_skew.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_empty_model_fallback.py | ||
| test_empty_session_hygiene.py | ||
| test_env_loader_secret_sources.py | ||
| test_evidence_store.py | ||
| test_fast_safe_load.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_diverged_update.py | ||
| test_install_lockfile_churn.py | ||
| test_install_no_initial_commit.py | ||
| test_install_ps1_native_stderr_eap.py | ||
| test_install_ps1_python_fallback_venv.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_profile_isolation_runtime.py | ||
| test_project_metadata.py | ||
| test_retry_utils.py | ||
| test_run_tests_parallel.py | ||
| test_sanitize_tool_error.py | ||
| test_setup_temporary_outputs.py | ||
| test_slash_worker_watchdog.py | ||
| test_sql_injection.py | ||
| test_stale_utils_module_import.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_loop_noise.py | ||
| test_tui_gateway_queue_on_busy.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_windows_subprocess_no_window_flags.py | ||
| test_yaml_indent_consistency_31999.py | ||
| test_yuanbao_integration.py | ||
| test_yuanbao_markdown.py | ||
| test_yuanbao_pipeline.py | ||
| test_yuanbao_proto.py | ||
| test_yuanbao_shutdown.py | ||