Peekaboo Logging Guide

#Overview

The CLI logger writes timestamped diagnostic messages to stderr in text mode and buffers the same messages for debug_logs in JSON mode. It supports free-form categories and key/value metadata.

#Log Levels

Peekaboo supports these levels from most to least verbose:

• TRACE
• VERBOSE
• DEBUG
• INFO
• WARN
• ERROR
• CRITICAL

The default minimum is warning unless PEEKABOO_LOG_LEVEL overrides it.

#Enabling Verbose Logging

#Command Line Flag

Use --verbose or -v on commands that expose the global runtime options:

peekaboo see --app Safari --verbose
peekaboo click --on "$ELEMENT_ID" --verbose

#Environment Variable

PEEKABOO_LOG_LEVEL=debug peekaboo see --app Safari

Accepted values are trace, verbose, debug, info, warning/warn, error, and critical.

#Log Output Format

The CLI logger formats text as:

[2026-08-08T12:34:56.789Z] VERBOSE: Message
[2026-08-08T12:34:56.789Z] VERBOSE [Capture]: Message {app=Safari, mode=window}

The timestamp is ISO 8601 with fractional seconds. Category and metadata are optional. Metadata ordering is not an API contract because it comes from a Swift dictionary.

#Log Categories

Categories are strings supplied by call sites rather than a central enum. Current CLI code uses categories including AI, Automation, Bridge, Capture, Commander, Menu, MultiScreen, Operation, and Performance.

The separate automation event logger uses Apple's unified logging for command activity; it does not change the stderr/JSON format above.

Detached native AX observations have a debug-only unified-log category, AXObservation, under boo.peekaboo.core. Capture it for the executing CLI or Bridge host while reproducing a slow or incomplete read:

log stream --level debug --predicate 'processIdentifier == 12345 AND subsystem == "boo.peekaboo.core" AND category == "AXObservation"'

Replace 12345 with the verified executing host PID. These records report native call type, traversal-node ordinal, elapsed milliseconds, raw AX errors, fixed attribute names for embedded errors, batch counts/fallbacks, and total worker time. Node zero denotes reads outside traversal. Fast successful reads are omitted; calls taking at least 50 ms and failed/fallback reads are retained. No UI values, labels, identifiers or action names are logged, and no additional AX queries are performed. This stream is separate from CLI debug_logs; it does not require a private-data logging profile.

#Performance Tracking

Logger.startTimer(_:) records a start time. stopTimer(_:threshold:) prepares a Performance message when verbose mode is active or a supplied threshold is exceeded; the configured minimum level still controls whether that verbose message is emitted:

[2026-08-08T12:34:56.789Z] VERBOSE [Performance]: Starting timer 'screen_capture'
[2026-08-08T12:34:57.122Z] VERBOSE [Performance]: Timer 'screen_capture' completed {duration_ms=333}

operationStart and operationComplete wrap this timer behavior and add Operation metadata.

#JSON Output Mode

When a command enables JSON output, the logger buffers messages instead of writing them beside the JSON document. Standard CLI response types include those buffered strings in debug_logs:

{
  "success": true,
  "data": {},
  "debug_logs": []
}

--json-output does not automatically lower the log threshold. Combine it with --verbose or PEEKABOO_LOG_LEVEL when detailed buffered logs are needed.

#Best Practices

1. Use verbose or debug logging while reproducing automation failures.
2. Add a category only when it helps isolate an owning subsystem.
3. Keep metadata small and non-sensitive; it is printed in text mode and returned in JSON mode.
4. Use timers for measured operations, not as a substitute for profiling.

#Integration with Other Tools

#Filtering Logs

peekaboo see --verbose 2>&1 | rg 'Performance'
peekaboo see --verbose 2>peekaboo.log

For JSON output, inspect .debug_logs instead of mixing diagnostics into stdout:

peekaboo see --app Safari --json-output --verbose | jq '.debug_logs'

#Troubleshooting

#No Verbose Output

1. Confirm the command accepts --verbose, or set PEEKABOO_LOG_LEVEL=verbose.
2. In text mode, check stderr rather than stdout.
3. In JSON mode, inspect debug_logs.