# Doctor YAML Pack Loader and First-Party Packs

## Module
Doctor

## Status
VERIFIED

## Description
YAML-based diagnostic pack loader allowing first-party and user-defined diagnostic packs, with a self-service Doctor UI page for running health checks interactively.

## Implementation Details
- **Plugin core**: `src/Doctor/__Plugins/StellaOps.Doctor.Plugins.Core/IDoctorPlugin.cs` -- plugin interface for pack loading
- **First-party packs**: 14+ doctor plugins under `src/Doctor/__Plugins/` covering Agent, Attestor, Auth, BinaryAnalysis, Compliance, Crypto, Environment, EvidenceLocker, Notify, Observability, Operations, Policy, Postgres, Release, Scanner, Storage, Timestamping, Vex
- **WebService**: `src/Doctor/StellaOps.Doctor.WebService/` -- web service for Doctor UI and API
- **Doctor endpoints**: `src/Doctor/StellaOps.Doctor.WebService/Endpoints/DoctorEndpoints.cs` -- API for loading and running packs
- **Doctor service options**: `src/Doctor/StellaOps.Doctor.WebService/Options/DoctorServiceOptions.cs` -- configuration including pack paths
- **Web UI**: `src/Web/StellaOps.Web/src/app/features/doctor/` -- self-service Doctor UI page
- **Source**: SPRINT_20260113_005_DOCTOR

## E2E Test Plan
- [ ] Verify YAML pack loading discovers and registers all first-party packs
- [ ] Test custom/user-defined pack loading from configured paths
- [ ] Verify Doctor UI page allows interactive check execution
- [ ] Test pack results display correctly in UI

## Verification
- Run: docs/qa/feature-checks/runs/doctor/doctor-yaml-pack-loader-and-first-party-packs/run-001/
- Date (UTC): 2026-02-11