Enrich the entire OpenAPI spec with descriptions, examples, format
annotations, extracted parameters, discriminated unions, and richer
response schemas — matching the patterns already established for
Sessions.
Structural changes:
- Extract CancelRunResponse and SteerRunResponse from inline schemas
- Change POST /runs/{id}/steer from 200 to 202 (async fire-and-forget)
- Split StageTurn into discriminated union (SystemStageTurn,
AssistantStageTurn, ToolStageTurn) with oneOf + discriminator
- Add status + created_at to StartRunResponse
- Add created_at to RunListItem and RunStatusResponse
- Add created_at + updated_at to SavedQuery
- Add format: date-time on RetroListItem.timestamp
- Extract 7 new reusable parameters (StageId, QuestionId, WorkflowName,
VerificationSlug, InsightQueryId, ProjectId, CheckpointFilter)
- Enrich existing RunId, PageLimit, PageOffset parameters
- Add descriptions + examples to all ~66 schemas and ~200+ properties
- Add operation descriptions to all ~35 endpoints
Rust handler updates:
- Change ManagedRun.created_at from Instant to chrono::DateTime<Utc>
- Populate new fields in StartRunResponse, RunStatusResponse
- Use new StageTurn discriminated union variants in demo data
- Update demo data timestamps to use DateTime<Utc>
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Replace the server-level `--demo` flag with per-request demo dispatch.
The Rust API builds both a demo and real router; incoming requests with
the `X-Arc-Demo: 1` header hit the demo router (auth disabled, static
data), all others hit the real router with normal auth.
The React web app gets a beaker icon toggle in the top nav bar (next to
the theme toggle) that sets an `arc-demo` cookie. Loaders read the
cookie to decide whether to send the `X-Arc-Demo: 1` header to the API.
The `ARC_DEMO=1` env var still works as a default when no cookie is set.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
