git.stella-ops.org/docs/modules/scheduler/README.md

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

• PostgreSQL (schema scheduler) for impact models.
• Valkey/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.

Implementation Status

Current Objectives

• Maintain deterministic behaviour and offline parity across releases
• Keep documentation, telemetry, and runbooks aligned with latest sprint outcomes
• Coordinate with Policy Engine for incremental re-evaluation workflows

Epic Milestones

• Epic 2 – Policy Engine & Editor: incremental policy run orchestration, change streams, explain trace propagation (in progress)
• Epic 6 – Vulnerability Explorer: findings updates and remediation triggers integration (in progress)
• Epic 9 – Orchestrator Dashboard: job telemetry and control surfaces for UI/CLI (planned)

Core Capabilities

• Impact cursor maintenance and queue management for re-scan/re-evaluate jobs
• Change-stream detection for advisory/VEX/SBOM deltas
• Policy-triggered recheck orchestration with runtime hooks
• SLA-aware retry logic with deterministic evaluation windows
• DSSE-backed completion events for downstream consumers

Integration Points

• PostgreSQL schema (scheduler) for impact models and job state
• Valkey/NATS for queueing with idempotency
• Policy Engine, Scanner, Notify for job coordination
• Orchestrator for backfills and incident routing

Operational Assets

• Monitoring: worker-grafana-dashboard.json, worker-prometheus-rules.yaml
• Runbooks: operations/worker.md
• Observability: metrics, traces, structured logs with correlation IDs

Technical Notes

• Coordination approach: review AGENTS.md, sync via docs/implplan/SPRINT_*.md
• Backlog tracking: SCHED-MODELS-20-001 and related tasks in ../../TASKS.md
• Module tasks: 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.