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feat: fast mode on lucy-vton-3.6; lucy-vton-latest resolves to 3.6 - #73
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- Advertise supported_speeds=("fast",) on the realtime lucy-vton-3.6
definition (backend serves 3.6 on the fast tier, billed at 2x).
- Update fast-capable model lists in the unsupported-speed warning,
RealtimeConnectOptions.speed docstring, README, examples, playground.
- lucy-vton-latest now resolves server-side to lucy-vton-3.6 (geometry
unchanged); update comments/docs accordingly.
- Tests: add lucy-vton-3.6 to FAST_REALTIME_MODELS and the no-warning
list; flip the assertion that 3.6 has no fast tier.
This was referenced Oct 11, 2026
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Oct 12, 2026
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Oct 12, 2026
…lves to 3.6 (#222) ## Description Two updates for `lucy-vton-3.6`, now that the API supports them: 1. **Fast mode on `lucy-vton-3.6`.** The realtime registry entry gains `supportedSpeeds: ["fast"]`. The API already serves 3.6 on the fast tier, billed at 2x the standard realtime rate like 3.5. Without this change, `speed: "fast"` on 3.6 logs a "model does not list it" warning. This applies to realtime only; batch has no speed tier. 2. **`lucy-vton-latest` → `lucy-vton-3.6`.** The alias resolves server-side, so the SDK only updates comments, docs and test names. 3.5 and 3.6 have identical geometry: realtime 1280x720 at `{ideal: 30, max: 30}`, video 1280x720 at 20 fps. The alias entries keep their values, and `lucy-vton-latest` keeps `supportedSpeeds: ["fast"]`. Following the AGENTS.md runbook, `supportedSpeeds` is added only now that the API actually serves 3.6 on the fast tier. ## Changes | File | Change | | --- | --- | | `src/shared/model.ts` | `supportedSpeeds: ["fast"]` on realtime `lucy-vton-3.6`; both `lucy-vton-latest` comments now point at 3.6 | | `src/realtime/client.ts`, `README.md`, `index.html` | fast-mode model lists now include `lucy-vton-3.6` | | `AGENTS.md` | removes "opt-in by name; no fast tier" from 3.6; `lucy-vton-latest` → `lucy-vton-3.6` | | `tests/unit.test.ts` | adds 3.6 to `fastRealtimeModels` (the pinned exact set); 3.6 asserts `["fast"]`; latest test titles say 3.6 | | `tests/realtime.unit.test.ts` | adds 3.6 to the "no speed warning" loop | ## Verification | Command | Result | | --- | --- | | `pnpm --filter @decartai/sdk typecheck` | pass | | `pnpm --filter @decartai/sdk test` | 386 passed (15 files) | | `pnpm --filter @decartai/sdk build` | pass | | `pnpm --filter @decartai/sdk test:package` | pass | | `pnpm --filter @decartai/sdk format:check` | 86 files, clean | The live e2e was not run locally because no `DECART_API_KEY` was available. ## Compatibility Additive. `models.realtime("lucy-vton-3.6").supportedSpeeds` changes from `undefined` to `["fast"]`. No ids, geometry or types change. ## Server-side - Fast mode for `lucy-vton-3.6` is already live on the API. - The `lucy-vton-latest` → 3.6 alias change is rolling out on the API separately. Only docs and comments here depend on it, so merge order doesn't matter. --- ### Companion PRs (lucy-vton-3.6: fast mode + `lucy-vton-latest` → 3.6) - JS SDK: #222 - Python: DecartAI/decart-python#73 - iOS: DecartAI/decart-ios#49 - Android: DecartAI/decart-android#34 - C++: DecartAI/decart-cpp#15 <!-- conductor-workspace-link --> --- [Open workspace in Conductor](https://app.conductor.build/decart/w/261)
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Summary
Mirrors the JS SDK (DecartAI/sdk) changes for the Python SDK:
lucy-vton-3.6(realtime only). The API now serves 3.6 on thespeed="fast"tier, billed at 2x like 3.5. The realtimelucy-vton-3.6definition now advertisessupported_speeds=("fast",), the same as 3.5. The video/batch definition is unchanged.lucy-vton-latestnow resolves server-side tolucy-vton-3.6(it was 3.5). The geometry is the same (realtime 1280x720 @ 30fps, video 1280x720 @ 20fps), so only comments, docs and examples change.Fast-capable realtime set is now:
lucy-2.5,lucy-latest,lucy-vton-3.5,lucy-vton-3.6,lucy-vton-latest.Changes
decart/models.py: addsupported_speeds=("fast",)to realtimelucy-vton-3.6. Update the unsupported-speed warning text. Change thelucy-vton-latestalias comments (realtime + video) to say it resolves to 3.6.decart/realtime/types.py: update the fast-capable list in theRealtimeConnectOptions.speeddocstring.tests/test_models.py: addlucy-vton-3.6toFAST_REALTIME_MODELS. Change the old "3.6 has no fast tier" assertion to("fast",). Rename the pinning test to..._vton_3_5_3_6. Add comments noting thatlucy-vton-latestresolves to 3.6.tests/test_realtime_unit.py: addlucy-vton-3.6to the models that must not warn onspeed="fast".README.md,examples/README.md,examples/realtime_synthetic.py,examples/video_tryon.py,playground/playground.py: update the fast-mode model lists and alias wording.No version bump or release.
Verification
Server-side
lucy-vton-3.6is already live on the API.lucy-vton-latest→ 3.6 alias change is rolling out on the API separately. This PR only changes docs/comments for the alias (geometry and fast capability are identical for 3.5 and 3.6), so merge order doesn't matter.Note
Low Risk
Registry metadata, docs, and test expectations only; no auth, billing logic, or connection behavior changes beyond advertising fast for 3.6.
Overview
Adds realtime fast mode (
speed="fast") forlucy-vton-3.6by settingsupported_speeds=("fast",)on its realtimeModelDefinition, matchinglucy-vton-3.5. Docs, warnings, examples, and the playground now list 3.6 among fast-capable models.Documents that
lucy-vton-latestresolves server-side tolucy-vton-3.6(was 3.5) in registry comments and user-facing text; video/batch geometry is unchanged. Tests pin the fast-capable realtime set and expect no warning when connecting withspeed="fast"on 3.6.Reviewed by Cursor Bugbot for commit 0dcc3c5. Bugbot is set up for automated code reviews on this repo. Configure here.
Companion PRs (lucy-vton-3.6: fast mode +
lucy-vton-latest→ 3.6)