watchdog.py DOX

Purpose

• Own the watchdog.py helper module.
• This module registers filesystem watchdogs with debouncing and path filtering.
• Keep this file-level DOX profile synchronized with watchdog.py because this directory is intentionally flat.

Ownership

• watchdog.py owns the runtime implementation.
• watchdog.py.dox.md owns durable notes about responsibilities, contracts, side effects, and verification for that implementation.
• Classes:
• _DispatchHandler (no explicit base class)
  • dispatch(self, event: Any)
• _Watch (no explicit base class)
• _PendingBatch (no explicit base class)
• _WatchRegistry (no explicit base class)
  • add(self, id: str, roots: list[str], patterns: list[str] | None, ignore_patterns: list[str] | None, events: WatchEvents, debounce: float, handler: WatchHandler) -> None
  • remove(self, id: str) -> bool
  • clear(self) -> None
  • start(self) -> None
  • stop(self) -> None
  • dispatch(self, scheduled_root: str, event: Any) -> None
• Top-level functions:
• _normalize_root(root: str) -> str
• _normalize_roots(roots: list[str]) -> list[str]
• _normalize_patterns(patterns: list[str] | None, default: list[str] | None=...) -> list[str]
• _normalize_events(events: WatchEvents) -> frozenset[WatchEvent]
• _map_event_type(event_type: str) -> WatchEvent | None
• _normalize_debounce(debounce: float) -> float
• _covering_roots(roots: Iterable[str]) -> set[str]
• _is_same_or_nested(path: str, root: str) -> bool
• _is_under_watch(path: str, watch: _Watch) -> bool
• _compile_matcher(root: str, patterns: list[str], ignore_patterns: list[str]) -> PatternMatcher
• _compile_single_matcher(root: str, patterns: list[str]) -> PatternMatcher
• add_watchdog(id: str, roots: list[str], patterns: list[str] | None=..., ignore_patterns: list[str] | None=..., events: WatchEvents=..., debounce: float=..., handler: WatchHandler | None=...) -> None
• remove_watchdog(id: str) -> bool
• clear_watchdogs() -> None
• start_watchdog_daemon() -> None
• stop_watchdog_daemon() -> None
• Notable constants/configuration names: _DEFAULT_PATTERNS, _DEFAULT_IGNORE_PATTERNS, _VALID_EVENTS, _EVENT_ALIASES.

Runtime Contracts

• Helper modules own reusable framework APIs and must preserve public callers unless all callers, tests, and docs are updated together.
• Update this file whenever public functions, classes, persistence behavior, path/security assumptions, side effects, or cross-module contracts change.
• Observed side-effect areas: filesystem reads, filesystem writes, filesystem deletion.
• Imported dependency areas include: __future__, dataclasses, os, pathlib, threading, typing, watchdog.observers.

Key Concepts

• Important called helpers/classes observed in the source: frozenset, dataclass, _WatchRegistry, _registry.start, os.path.abspath, _compile_single_matcher, _registry.add, _registry.remove, _registry.clear, _registry.stop, self.registry.dispatch, threading.RLock, self._ensure_watchdog_available, _normalize_roots, _normalize_patterns, _normalize_events, _normalize_debounce, self._stop_observer, _map_event_type, _covering_roots.
• Keep request/response, tool, or helper semantics documented here at the same time as source changes.

Work Guidance

• Preserve public helper APIs used by core code and plugins unless every caller is updated.
• Keep path, auth, secret, persistence, network, and subprocess behavior explicit and bounded.
• Prefer adding cohesive helper functions here only when behavior is reused across modules.

Verification

• Run targeted tests for changed helper behavior; run security regressions for auth, filesystem, WebSocket, tunnel, upload, or secret-handling helpers.
• Related tests observed by source search:
  • tests/test_model_config_api_keys.py
  • tests/test_model_config_project_presets.py
  • tests/test_time_travel.py

Child DOX Index

No child DOX files.