Bilibili Thumbnail Maker

Create one Bilibili video thumbnail from a topic, title, script, key-frame screenshot, portrait, product image, visual reference, or accepted draft. Reuse known channel style and viewer context, then complete the shortest route to one clear thumbnail.

Choose the route

• Generate a cover: use beatra.images.generate from the video topic, title, hook, or script when no source image is required.
• Compose from images: upload an exported key frame, portrait, product, or ordered references and use beatra.images.transform. If the user only has a video file, ask for one exported key frame or screenshot; this image workflow does not extract frames from video.
• Refine an accepted thumbnail: use beatra.images.edit with the accepted image as images[0] and no more than two normalized local edit regions.

This Skill creates a new visual asset; use cover-performance-preflight to review an existing cover without making it, and use product-video-studio when the requested outcome is the video itself.

Shape the thumbnail brief

Reuse the topic, title, channel series style, intended viewer, visual references, and must-keep details. The topic or title is a hard input: the cover must be readable together with the title, so ask before paying if both are missing. Select the canvas from the user-stated destination, source frame, or current publishing requirement; propose a landscape video-thumbnail canvas only when that is the user's intended destination, and freeze the exact canvas before the paid call. If more than one candidate is described, they must be structural differences, not color variants.

Plan one bold focal subject, clear small-size hierarchy, one visual hook, headline-safe space, and ordered image roles. Prefer a text-safe area rather than promising exact rendered Chinese words or logos. When the user requires in-image text, include the exact short text in the paid confirmation and check it character by character only if it is actually visible.

Prepare and confirm one paid request

Use only this Skill's bundled scripts/mcp_client.py for every remote Beatra operation. Do not configure or call a host Beatra Connector, and do not use REST/OpenAPI as a fallback. Upload local images through the bundled client and label each artifact's role in its preserved input order. Uploading does not inspect media; make visual claims only from accessible images and results.

Keep model: "auto" and count: 1 unless the user chooses otherwise. Call beatra.models.list only when availability, controls, compatibility, or price needs a real decision. Before generation, show and freeze the prompt, exact canvas, image roles and order, headline treatment, model, controls, and count. Planning is free; the generation request is paid work.

After approval, create one opaque stable client_request_id without user content and submit once. A changed prompt, images or order, canvas, model, count, or control starts new paid work and requires a fresh confirmation and request ID. See workflow for payload shapes.

Track, review, and deliver

Save the returned task_id and poll only that task with beatra.tasks.get. When its ID is lost, find candidates through beatra.tasks.list and verify the selected task with tasks.get. Replay an identical payload with the same ID only when the original creation response is genuinely unknown. Slow polling, connection, update, or authorization errors never justify a replacement paid request.

Use beatra.tasks.cancel only at the user's request. A 409 means the original task still runs, so continue tracking it. When the result is visible, review small-size recognition, focal hierarchy, safe-area contrast, crop risk, the confirmed canvas, and must-keep details. Deliver artifact links, observed dimensions, task ID, resolved model, and returned billing.net_charged_credits. Offer at most one focused, unexecuted refinement.

References by task

• Payloads, source-image ordering, and editing: workflow
• First install or expired authorization: installation and authentication
• Bundled client diagnostics: Bundled MCP Client diagnostics
• Registration: installation registration
• Polling and output fields: tasks and results
• Billing and recovery: billing, errors, and recovery
• Disconnecting: uninstall and disconnect
• Updates and security: updates and security

Updates and security

This Skill runs only the files installed with it and leaves them unchanged while it runs; it never downloads or executes other code. It talks to Beatra's official services over HTTPS, and a file you choose to upload goes only to the one-time upload address Beatra issues for it.

Once a day at most, the bundled client reads Beatra's public version list. When the store or tool you installed from has a newer version, it prints one line with the command that updates it there. Updating stays your choice, through that store or tool. See updates and security.