External platform integrations — Vimeo, YouTube, Adobe CC, bidirectional

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Context

Earlier framing dismissed platform integrations as “platform lock-in” and proposed federation as the substitute. That framing was wrong for the actual use case. Studios need to:

Publish approved videos to Vimeo (private review with publisher), YouTube (public reveal), Adobe Creative Cloud Libraries (designers using existing Adobe-suite assets in production), Falcon.io (marketing scheduling).
Pull content from Adobe CC and similar (designers maintain Libraries that artists in Artist Alley need to reference), and optionally treat hosted videos as first-class Artist Alley assets for review (a Vimeo cut becomes the source-of-truth video that annotations attach to).

Federation is the right pattern for Artist-Alley-to-Artist-Alley content flow. It does NOT replace integration with platforms whose audiences the studio specifically wants to reach.

Decision

Add Phase 1.29 — External platform integrations — as a provider- abstraction layer over outbound publishing and inbound asset ingestion.

Provider model

A platforms.Provider interface in Go:

type Provider interface {
    Name() string                                   // "vimeo", "youtube", "adobe-cc", "falcon"
    AuthFlow() AuthFlow                             // OAuth 2.0 dance specifics
    Capabilities() Capabilities                     // {Publish, Pull, Sync, Embed}
    Publish(ctx, asset, settings) (RemoteRef, error)
    Pull(ctx, remoteRef) (asset, error)
    Sync(ctx, remoteRef, asset) (Action, error)     // for two-way mirroring
    Embed(ctx, remoteRef) (HTML, error)             // for in-AA viewer
    Webhook(ctx, payload) ([]Event, error)          // upstream webhook → AA events
}

Each provider lives in app/internal/platforms/<name>/. Adding YouTube is dropping a new package + implementing the interface + wiring an OAuth client ID config.

Initial providers

Provider	Publish	Pull	Sync	Webhook
Vimeo	✓	✓	✓	✓
YouTube	✓	✓	—	✓
Adobe CC Libraries	✓	✓	✓	✓
Falcon.io	✓	—	—	—

Two-way sync is delicate; only enabled where the upstream API genuinely supports change notifications (Vimeo + Adobe CC).

Linked-asset model

When an asset is published to Vimeo, AA stores the remote URL + a sync state on the asset row:

{
  "platform_links": [
    {
      "provider": "vimeo",
      "remote_id": "987654321",
      "remote_url": "https://vimeo.com/987654321",
      "published_at": "2026-05-30T12:00:00Z",
      "published_by": 42,
      "sync_state": "in-sync|drifted|deleted-remotely",
      "last_seen": "2026-05-31T03:00:00Z"
    }
  ]
}

The badge surfaces in the post-detail modal: “Published to Vimeo (in sync).” If remote is deleted or drifts, the badge flags it and the operator can re-publish.

Pull-as-asset

A “Connect Vimeo / Adobe CC” admin surface authorizes via OAuth and exposes inbound items as if they were local assets — but with the origin_server_id analogue (origin_platform_id) set so they’re clearly marked as external. Federation and external platforms use the same origin_* mechanism — the storage layer doesn’t care which.

Auth secrets

OAuth client secrets stored in Cloudflare Worker Secrets — the same infrastructure ADR 0017 uses for the licensing private key. Per-studio OAuth tokens (refresh + access) stored encrypted at rest in the local DB using the existing secret-encryption helper.

Federation interaction

Federation (Phase 1.22) is for AA↔AA links. Platform integrations are for AA↔third-party. The two systems use the same origin_* flag on the resource row so a unified “show me everything from external sources” filter works without provider branching.

Per-tier behaviour

Community: 1 active platform connection (any provider).
Pro: 5 active platform connections (any combination).
Enterprise: unlimited connections + organization-level OAuth apps (for studios that want their own Vimeo / Google Cloud client, not the artist-alley.org-issued one).

Enforced via the tangled-derivation model from ADR 0017 (a platformConnectionCap derived value).

Consequences

Positive

Studios get a single tool that hosts internal review AND publishes to the platforms they actually need to reach.
Provider abstraction means adding TikTok / Instagram / X is a drop-in package, not a re-architecture.
Linked-asset model preserves the post-detail thread / annotations even when the published video lives on Vimeo.

Negative

Each provider’s API changes break us. Mitigation: provider packages are isolated; a Vimeo break does not block YouTube. Versioned API contracts per provider.
OAuth credential rotation is per-provider, per-studio. Cron job to refresh tokens before expiry.

Alternatives considered

Skip outbound publishing; rely on federation. Doesn’t reach the publishers / marketing audiences who live on Vimeo / YouTube. Rejected per user override 2026-05-30.
One opinionated provider (Vimeo only). Insufficient.
Pure webhook-out (no SDK integration). Works for notification but not for content publishing or two-way sync.

Reference

Phase 1.29 in docs/roadmap.md.
Federation (Phase 1.22) uses the same origin_* mechanism on the resource row.
Chat integrations (Phase 1.30, ADR 0022) use a sibling provider abstraction for notification-class providers.