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Rotimi Best d5b07d356e feat: HLS streaming, transcripts, agent course generation & landing-page course previews (#663 )

New features:
- HLS video encoding/streaming (hls routes, hls-encoder) and a media
  transcripts pipeline (transcripts route + media-transcript queries)
- AI assistant chat vs. run model: agent-course-generation worker/queue,
  run-monitor pane, chat-changes card, content ask-ai bar
- Per-theme course-page previews across org landing-page themes (bold,
  classic, corporate, editorial, etc.) with a shared course token/component set
- View-as-student mode and login-link / link-invite invite flows

Refactor:
- Extract packages/core consolidating config (env, storage, dashboard-url),
  services and utils previously duplicated under apps/api/src/config
- Remove legacy agent service modules (chat-tools, chat-context,
  context-window, document, fetch-url, lesson-content)
- Relax Cross-Origin-Resource-Policy to allow cross-origin media embedding
- Add format script to tenant-router so turbo run format covers it

2026-06-07 18:43:05 +01:00

4.6 KiB

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`@cio/core` — shared business services

This package holds the business-logic layer that both apps/api (HTTP) and apps/jobs (BullMQ worker) need to call. Anything in here is transport-agnostic: no Hono Context, no ContentfulStatusCode, no c.json, no zValidator middleware. Just functions that compose database queries, apply business rules, and raise AppError on failure.

The name is intentional: this is the core of the platform. The HTTP routes in apps/api and the worker processors in apps/jobs are thin transports over this layer. Anything they share has to live here — otherwise one app ends up depending on the other (apps/jobs → apps/api was the original sin that motivated extracting this package).

What lives here

Folder	Contents
`src/services/agent`	The durable agent runner, chat-mode tool implementations, planning helpers.
`src/services/course`	Course / section / content / landing-page business logic.
`src/services/exercise`	Exercise + question CRUD and orchestration.
`src/services/lesson`	Lesson read/write helpers.
`src/services/assets`	Asset upload, attach, detach, presign — used by both API routes and worker.
`src/services/jobs`	BullMQ enqueue helpers (e.g. `startMediaJob`) callable from any service.
`src/services/lesson-language`	Localized lesson content helpers.
`src/utils`	Storage, presigning, sanitization, tinybird, redis helpers.
`src/config`	Env schema (`env`), storage config, dashboard URL helpers.

Placement rule

            ┌─────────────────────────────────────────────────────┐
            │  Does the function need a Hono Context, or call     │
            │  `c.json`, or validate a request shape?             │
            │                                                     │
            │      YES  →  it's a route handler, stays in         │
            │              `apps/api/src/routes/{domain}/…`       │
            │                                                     │
            │      NO   →  it's a business service, goes in       │
            │              `packages/core/src/services/{domain}/…`│
            └─────────────────────────────────────────────────────┘

If the function only touches the database and has no business logic, it doesn't belong here either — it goes in packages/db/src/queries/{domain}/. The split is:

Query layer (@cio/db/queries): pure SQL/Drizzle helpers, no business rules.
Service layer (@cio/core/services): composes queries, applies rules, throws AppError.
Route layer (apps/api/src/routes): HTTP transport — auth, validation, status codes, response shapes.
Worker layer (apps/jobs/src/workers): BullMQ transport — pulls a job, calls services, persists outcome.

What does NOT belong here

HTTP-shaped code (Hono types, response helpers, content-type handling) — keep in apps/api.
BullMQ worker bootstrapping (Redis connection, worker lifecycle) — keep in apps/jobs.
Frontend / Svelte / UI primitives — those live in apps/dashboard or packages/ui.
Raw Drizzle query functions with no business logic — those go in packages/db/queries.

Why it isn't called `@cio/services`

@cio/core is shorter and reads cleaner at import sites (from '@cio/core/services/course/content'). The folder structure makes it obvious that it's a services layer; the package name doesn't need to repeat that.

History

This package was originally extracted as @cio/agent-runtime to hold the durable agent runner and its transitive closure. That closure turned out to be ~80% generic business services that apps/api and the worker both need, so the package was renamed to @cio/core to match its contents. The agent runner (services/agent/course-generation-runner.ts) remains the top-level export for apps/jobs, but it's just one of many services living here now.

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@cio/core — shared business services