v2-web schema drift: generate/cover 422 body.params.* — missing token_provider, duration, edit_session_id, project_id, lyrics_project_id, lyricist_id

[brivad]

Symptom

Since ~2026-08-01, suno cover (and generate) fails on a captcha-cleared Pro account:

HTTP 422: {'type': 'string_type', 'loc': ['body', 'params', 'title'], 'msg': 'Input should be a valid string'}

(schema_drift error; the API returns body.params.* locs for the flat fields the CLI sends.)

Root cause

Suno's POST /api/generate/v2-web/ now requires fields that GenerateRequest (src/api/types.rs) omits:

• token_provider (present as explicit null)
• duration (null)
• edit_session_id (null)
• project_id (null)
• lyrics_project_id (null)
• lyricist_id (null)

The current web app sends all of them (reverse-engineered from the live suno.com JS bundle on 2026-08-01; body is still flat, no params wrapper — the body.params.* error loc is server-side wrapping).

Working body (validated HTTP 200, clips returned)

{
  "generation_type": "TEXT",
  "title": "...", "tags": "...", "negative_tags": "",
  "mv": "chirp-fenix", "prompt": "", "make_instrumental": false,
  "token": null, "token_provider": null,
  "user_uploaded_images_b64": null,
  "metadata": { "web_client_pathname": "/create", "is_max_mode": false,
    "is_mumble": false, "create_mode": "custom", "user_tier": "",
    "create_session_token": "<uuid>", "disable_volume_normalization": false },
  "override_fields": [],
  "cover_clip_id": "<clip>", "cover_start_s": null, "cover_end_s": null,
  "persona_id": null, "artist_clip_id": null, "artist_start_s": null,
  "artist_end_s": null, "continue_clip_id": null,
  "continued_aligned_prompt": null, "continue_at": null,
  "transaction_uuid": "<uuid>",
  "duration": null, "edit_session_id": null, "project_id": null,
  "lyrics_project_id": null, "lyricist_id": null
}

Note

The types.rs comment says token_provider "422s on a string" — with the new schema the KEY must be present (explicit null is fine). gpt_description_prompt is also sent for describe mode. Happy to open a PR with the updated GenerateRequest + tests if useful.