Script Kit Logging

Structured logging patterns for debugging and observability.

AI Compact Log Mode (SCRIPT_KIT_AI_LOG=1)

Compact stderr format: SS.mmm|L|C|message

• L: i INFO, w WARN, e ERROR, d DEBUG, t TRACE
• C categories:
  • P position, A app, U UI, S stdin, H hotkey
  • V visibility, E exec, K key, F focus, T theme
  • C cache, R perf, W window_mgr, X error
  • M mouse_hover, L scroll_state, Q scroll_perf
  • D design, B script, N config, Z resize

Example:

• Standard: ... INFO ... Selected display origin=(0,0)
• Compact: 13.150|i|P|Selected display origin=(0,0)

Enable:

SCRIPT_KIT_AI_LOG=1 ./target/debug/script-kit-gpui 2>&1

Log Modes

Mode	Command	Use Case
Compact AI logs	SCRIPT_KIT_AI_LOG=1	Default for AI agents (saves ~70% tokens)
Full debug logs	RUST_LOG=debug	Deep debugging
Specific module	RUST_LOG=script_kit::theme=debug	Target one module

JSONL Logging

Logs to: ~/.scriptkit/logs/script-kit-gpui.jsonl

Line example:

{"timestamp":"...","level":"INFO","target":"script_kit::executor","message":"Script executed","fields":{"script_name":"hello.ts","duration_ms":142,"exit_code":0}}

Tracing Patterns

Use tracing + tracing-subscriber:

• #[instrument] for spans
• Record duration_ms; warn if slow (e.g. >100ms)

Correlation IDs:

• Generate UUID per user action/run
• Attach to spans so nested logs inherit it

Required fields when relevant: correlation_id, duration_ms, bead_id, agent_name, files_touched

Log Level Guide

• error: failure
• warn: unexpected but handled
• info: key events
• debug: development
• trace: very verbose

Filter by targets (module paths): script_kit::ui, script_kit::executor, script_kit::theme

Error Handling

• Application errors: anyhow::Result; add .context() at boundaries
• Domain/library errors: thiserror when callers match variants
• User-facing errors: NotifyResultExt → log first (tracing::error!) then toast

Best practices:

• Don't unwrap()/expect()
• Add context at each level ("which file?", "what operation?")
• Use typed fields in logs (avoid interpolated strings)

Log Queries

grep '"correlation_id":"abc-123"' ~/.scriptkit/logs/script-kit-gpui.jsonl
grep '"duration_ms":' ~/.scriptkit/logs/script-kit-gpui.jsonl | jq 'select(.fields.duration_ms > 100)'
grep '"level":"ERROR"' ~/.scriptkit/logs/script-kit-gpui.jsonl | tail -50