AIPass/src/aipass/trigger

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Trigger

Purpose: Event bus and error dispatch for AIPass. Branches fire events, registered handlers react. Medic watches logs for errors, fingerprints them, gates dispatch through an 8-stage pipeline, and notifies the responsible branch. Module: aipass.trigger Version: 2.2.0 Last Updated: 2026-05-02

Commands

drone @trigger                              # Introspection (modules, version)
drone @trigger --help                       # Full command listing
drone @trigger --version                    # Version string

# Event bus
drone @trigger fire <event> [key=val ...]   # Fire an event with optional data
drone @trigger list                         # List all registered events + handlers
drone @trigger status                       # Event bus and medic state

# Error registry
drone @trigger errors list                  # View tracked errors
drone @trigger errors stats                 # Registry stats + circuit breaker
drone @trigger errors circuit-breaker       # Circuit breaker state
drone @trigger errors detail <fingerprint>  # Single error detail
drone @trigger errors --help                # Error subcommand help

# Medic (error dispatch control)
drone @trigger medic on                     # Enable auto-dispatch
drone @trigger medic off                    # Disable auto-dispatch
drone @trigger medic status                 # Medic state + suppression stats
drone @trigger medic mute @branch           # Suppress dispatch to a branch
drone @trigger medic unmute @branch         # Resume dispatch to a branch
drone @trigger medic --help                 # Medic subcommand help

# Log watchers
drone @trigger branch_log_events status     # Branch log watcher state
drone @trigger branch_log_events --help     # Branch watcher help
drone @trigger log_events status            # System log watcher state
drone @trigger log_events --help            # System watcher help

Python API

from aipass.trigger.apps.modules.core import Trigger

# Fire an event — all registered handlers run
Trigger.fire("plan_file_created", path="/path/to/FPLAN-0042.md")

# Register a handler
def on_plan_created(**data):
    print(f"Plan created at {data['path']}")

Trigger.on("plan_file_created", on_plan_created)

# Remove a handler
Trigger.off("plan_file_created", on_plan_created)

from aipass.trigger.apps.modules.errors import report_error

# Cross-branch error reporting
result = report_error(
    branch="api",
    error_type="ConnectionError",
    message="Timeout reaching upstream",
    source_file="client.py",
)
# Returns: {"is_new": True, "fingerprint": "abc123", "count": 1, ...}

Events

14 events registered via handlers/events/registry.py on first Trigger.fire(). All fire through the event bus.

Event	Handler	Trigger	Action
startup	startup.py	Branch session starts	Error catch-up scan across log files, memory rollover check
error_detected	error_detected.py	Error registered via log watcher or report_error()	Full 8-gate Medic dispatch — emails fix-it to affected branch + wake_branch()
error_logged	error_logged.py	System log error (fallback path)	Monitor-only: logs the event, no dispatch
warning_logged	warning_logged.py	Warning in system logs	Logged for monitoring, no dispatch
plan_file_created	plan_file.py	New PLAN file detected	Updates Flow's PLAN_REGISTRY.json
plan_file_deleted	plan_file.py	PLAN file removed	Marks plan as deleted in registry
plan_file_moved	plan_file.py	PLAN file relocated	Updates registry location
bulletin_created	bulletin_created.py	New system bulletin posted	Propagates to branch dashboards
memory_threshold_exceeded	memory_threshold_exceeded.py	Memory file near limit (600 lines)	Emails compression notification to branch
memory_template_updated	memory_template_updated.py	Memory template changed	Pushes template updates to branches
memory_saved	memory.py	Memory file written	Placeholder for future rollover trigger
cli_header_displayed	cli.py	CLI displays headers	Registration hook
pr_created	pr_status_sync.py	PR opened on GitHub	Runs drone @prax status sync (fire-and-forget)
pr_merged	pr_status_sync.py	PR merged on GitHub	Runs drone @prax status sync (fire-and-forget)

Medic

Error monitoring subsystem. Watches branch and system logs for errors, fingerprints them via SHA1, deduplicates, and dispatches fix-it notifications to the responsible branch.

Dispatch pipeline (8 gates):

1. Medic enabled — global on/off toggle
2. Branch not muted — per-branch suppression
3. Count >= 2 — first occurrence suppressed, dispatch on recurrence
4. Not DEV_CENTRAL — devpulse protected from self-dispatch
5. Branch in registry — target must be a registered citizen
6. Circuit breaker closed — trips after 10 errors in 60s, 300s cooldown
7. Per-fingerprint backoff — exponential backoff per unique error
8. Rate limit — prevents dispatch floods

On successful dispatch: sends email via deliver_email_to_branch() then calls wake_branch() to spawn an agent in the target branch immediately.

Persistent log watching runs as a systemd user service (trigger-log-watcher.service). Starts both branch and system watchers, handles SIGTERM/SIGINT for clean shutdown.

systemctl --user status trigger-log-watcher    # Check watcher service
systemctl --user restart trigger-log-watcher   # Restart watcher

Error Registry

SHA1 fingerprinting for error deduplication. Tracks: fingerprint, branch, error type, message, count, first/last seen, dispatch history, source fix status.

Circuit breaker: Trips after 10 errors within 60 seconds. Rejects all dispatch while open. Auto-resets after 300s cooldown. State persists across restarts in trigger_cb_state.json.

Per-fingerprint tracking: Each unique error has independent exponential backoff and dispatch count. State persists across restarts.

Architecture

trigger/
├── apps/
│   ├── trigger.py                  # Entry point (auto-discovers modules/)
│   ├── config.py                   # Constants, atomic_write_json, json_file_lock
│   ├── log_watcher_service.py      # Persistent watcher daemon (systemd)
│   ├── modules/
│   │   ├── core.py                 # Event bus: Trigger.fire/on/off/status
│   │   ├── errors.py               # Error registry CLI: list/stats/circuit-breaker
│   │   ├── medic.py                # Medic toggle: on/off/status/mute/unmute
│   │   ├── branch_log_events.py    # Branch log watcher CLI: start/stop/status
│   │   └── log_events.py           # System log watcher CLI: start/stop/status
│   └── handlers/
│       ├── error_registry.py       # SHA1 fingerprinting, circuit breaker, backoff
│       ├── error_reporter.py       # report_error() API + source fix emails
│       ├── log_watcher.py          # Branch log watcher (watchdog, position tracking)
│       ├── medic_state.py          # Medic config persistence (trigger_config.json)
│       ├── json/
│       │   └── json_handler.py     # JSON structure logging
│       ├── events/
│       │   ├── registry.py         # Auto-registers all 14 event handlers
│       │   ├── startup.py          # Startup catch-up scan
│       │   ├── error_detected.py   # 8-gate Medic dispatch
│       │   ├── error_logged.py     # Monitor-only (no dispatch)
│       │   ├── warning_logged.py   # Warning monitor
│       │   ├── plan_file.py        # Plan lifecycle events
│       │   ├── bulletin_created.py # Bulletin propagation
│       │   ├── memory_threshold_exceeded.py
│       │   ├── memory_template_updated.py
│       │   ├── memory.py           # memory_saved placeholder
│       │   ├── cli.py              # cli_header_displayed hook
│       │   └── pr_status_sync.py   # PR → prax status sync
│       └── watchers/
│           └── log_watcher.py      # System log watcher (system_logs/ dir)
├── tests/                          # 367 tests across 12 modules
├── trigger_json/                   # Runtime state files
│   ├── trigger_config.json         # Medic state, muted branches
│   ├── error_registry.json         # All tracked errors
│   └── trigger_cb_state.json       # Circuit breaker persistence
└── trigger_data.json               # Log watcher positions + dedup hashes

Data Safety

• Atomic writes: All JSON state files use config.atomic_write_json() — writes to a temp file in the same directory, then os.replace() for atomic rename. No partial writes on crash.
• File locking: All read-modify-write cycles wrapped in config.json_file_lock() using fcntl.flock with .lock sidecar files. Prevents concurrent corruption from watcher + CLI.
• Circuit breaker persistence: Trip state, recent errors, per-fingerprint tracking all survive restarts via trigger_cb_state.json.

Integration Points

Depends On

• aipass.prax — Logging via system_logger
• aipass.cli — Console output and formatting
• aipass.ai_mail — deliver_email_to_branch() for dispatch emails (lazy import, graceful fallback)

Provides To

• All branches — Event bus (Trigger.fire, Trigger.on, Trigger.off)
• All branches — Cross-branch error reporting (report_error())
• All branches — Automated error dispatch via Medic

Testing

367 tests across 12 test modules, all passing. Coverage: 55/76 public functions (72%).

cd src/aipass/trigger && pytest    # Run all tests

Test files: test_core, test_errors, test_medic, test_error_registry, test_error_reporter, test_medic_state, test_log_watcher, test_watchers_log_watcher, test_branch_log_events, test_log_events, test_json_handler, test_pr_status_sync

Compliance

Seedgo: 100% (34/34 standards). Zero type errors. All categories at 100%.

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Last Updated: 2026-04-22

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