Sigil: Signal Observer

• a sigil execution has completed, blocked, or failed,
• an invocation envelope exists or can be assembled safely,
• the run produced meaningful user-facing output, decision, validation, or orchestration result,
• the project has or wants a repository-local observability ledger,
• reflection thresholds should be evaluated from real usage.

• invocation envelope path, preferably matching framework/observability/templates/invocation-envelope.json,
• optional telemetry ledger path,
• optional hook operations ledger path,
• visible execution summary,
• changed artifact list,
• validation results,
• Quality Bar and Anti-Patterns for the invoked sigil, when available,
• reflection state, when available.

• envelope: .arcanum/observability/tmp/latest-invocation.json
• ledger: .arcanum/observability/signals/sigil-invocations.jsonl
• reflection state: .arcanum/observability/reflection-state.json

Use .arcanum/observability/hooks/hook-operations.jsonl for observer start, completion, skip, failure, and dedupe events. These rows must carry observe: false.

• read or assemble a valid invocation envelope,
• derive signals only from visible evidence,
• append one valid JSON object per observed invocation,
• preserve privacy and avoid sensitive raw content,
• classify Quality Bar status and Anti-Pattern hits when evidence exists,
• evaluate reflection trigger state,
• avoid blocking or changing the primary task outcome.

• rewriting the observed sigil during observation,
• storing secrets or large raw conversation excerpts,
• inventing quality status without evidence,
• appending invalid JSONL,
• treating observability failure as primary task failure unless observability was the requested task,
• producing many telemetry rows for one invocation,
• hiding severe workflow gaps behind a generic success note.

## Signal Observer Result

- Observed sigil: <name>
- Result: recorded | skipped | failed
- Ledger: <path>
- Signals: <counts by type>
- Quality Bar: pass | partial | fail | not_checked
- Anti-Pattern hits: <count and summary>
- Reflection trigger: none | manual | usage-threshold | output-threshold | gap-threshold | severe-gap
- Recommendation: none | targeted-update | reflect-now
- Validation: <checks performed>