# StellaOps Scheduler

Scheduler detects advisory/VEX deltas, computes impact windows, and orchestrates re-evaluations across Scanner and Policy Engine.

## Responsibilities
- Maintain impact cursors and queues for re-scan/re-evaluate jobs.
- Expose APIs for policy-triggered rechecks and runtime hooks.
- Emit DSSE-backed completion events for downstream consumers (UI, Notify).
- Provide SLA-aware retry logic with deterministic evaluation windows.

## Key components
- `StellaOps.Scheduler.WebService` control plane.
- `StellaOps.Scheduler.Worker` job executor.
- Shared libraries under `StellaOps.Scheduler.*`.

## Integrations & dependencies
- MongoDB for impact models.
- Redis/NATS for queueing.
- Policy Engine, Scanner, Notify.

## Operational notes
- Monitoring assets in ./operations/worker-grafana-dashboard.json & worker-prometheus-rules.yaml.
- Operational runbook ./operations/worker.md.

## Related resources
- ./operations/worker.md
- ./operations/worker-grafana-dashboard.json
- ./operations/worker-prometheus-rules.yaml

## Backlog references
- SCHED-MODELS-20-001 (policy run DTOs) and related tasks in ../../TASKS.md.
- Scheduler observability follow-ups in src/Scheduler/**/TASKS.md.

## Epic alignment
- **Epic 2 – Policy Engine & Editor:** orchestrate incremental re-evaluation and simulation runs when raw facts or policies change.
- **Epic 6 – Vulnerability Explorer:** feed triage workflows with up-to-date job status, explain traces, and ledger hooks.
- **Epic 9 – Orchestrator Dashboard:** expose job telemetry, throttling, and replay controls through orchestration dashboards.