# Cognitive Strata

Second orchestration plan (after the foundation): the cognitive consumption
layer over the durable spine, per design section S8.

## Components (src/rune/orchestration/)

- cadence.py — CadenceConfig + durable per-cadence cursor
- no_change.py — content_fingerprint + per-cadence NoChangeGate
- reflex.py — deterministic reflex engine (facts, never judgments)
- proposals.py — bounded ProposalSink with dead letter
- workers.py — CognitiveWorker protocol + WorkerRegistry (independent toggles)
- deadline.py — DeadlinePolicy for forced runs
- health.py — CadenceHealth ledger (per-cadence accounting)
- cognitive.py — build_cognitive composition + DeadlineRunner

## Contracts

- Disabling or failing one cadence never affects another (S8/A1).
- Unchanged evidence is skipped by the no-change gate (>=80% avoidance goal).
- Workers only emit proposals; canonical state is untouched by this plan.
- Deadline policies force a run so quiet periods cannot starve a cadence.

## Run

    PYTHONPATH=src:. python3 -m pytest tests/ -k orchestration --ignore=tests/test_message_widgets.py -q
    PYTHONPATH=src:. python3 src/rune/canary_cognitive_strata.py