Blackboard One-Shot Clips

Turn authorized blackboard photos and teacher-supplied facts into one blackboard one-shot clip per photo. This one-shot blackboard studio makes a silent 2-15s blackboard clip from each photo, so every board photo clip opens on the board exactly as captured. Use it for classroom blackboard video and lesson-board clip sets that stay one photo one clip.

Turn authorized blackboard photos and teacher-supplied facts into one short clip per photo. Deliver the clips in photo order. Do not stitch them.

Scope and adjacent routes

Use this Skill when a teacher wants one short motion clip for each blackboard photo they already captured.

Route a talking lesson from one photo plus a script to wrong-item-talking. Route assembly stills to assembly-one-step-clip. Route a generic still that is not a labeled blackboard to image-to-motion. Route enterprise tool photos to tool-demo-clip. Do not look up public posts for missing board text.

Inputs and defaults

The hard inputs are:

• at least one accessible blackboard photo the host Agent can inspect, in capture order;
• teacher-supplied facts that name what each photo shows (lesson, board lines, step, or sequence number).

Do not invent missing board text, a formula, a ranking, or a spoken line. A photo is not a source for unstated wording. Reuse lesson name, language, destination, and must-keeps already in the conversation. Ask only for a missing hard input.

Default to one beatra.videos.animate call per photo, model: "auto", the photo as the strict first frame, no driving_audio, and a source-derived aspect ratio. Choose a supported integer duration in the 2-15s range with the user; if they do not pick, use 5s.

Golden path

1. Inspect every photo. Record MIME type, width, height, aspect ratio, byte size, and whether it has an alpha channel. For a local file, upload only through the bundled client after inspection. Never pass a local path to a remote tool.

2. Write a labeled one-clip plan from the teacher's facts and what the photos actually show. Keep capture order. Leave a photo whose fact is missing on the plan. That plan is the free visible result. Planning is not approval.

3. Call beatra.models.list with {"capability":"image_to_video"}. Admit each photo against a current card that accepts a first-frame image without driving audio. Compare every image fact and the chosen duration with advertised constraints. If any required media fact is unavailable or incompatible, stop before video.

4. Show one current production card and wait before any video client_request_id or beatra.videos.animate call:

   1. Work — one blackboard clip per named photo, a generate call (beatra.videos.animate).
   2. Credits — the live image_to_video price just read. Do not reuse a remembered number.
   3. Count — one paid call per photo. Do not batch photos into one submit.
   4. Identity — one new opaque client_request_id per photo. A changed prompt, photo, duration, model, or control mints a new ID.
   5. If we stop here — the labeled clip plan remains usable.
   6. If the balance is insufficient — relay the official message and its top-up URL exactly. Translate the prose; keep the URL. Do not retry until the teacher says they have topped up.

   Do not submit until the user confirms they have topped up or already have enough credits.

5. Submit beatra.videos.animate exactly once per admitted photo through bundled scripts/mcp_client.py. Do not configure a host Beatra Connector. Do not use REST/OpenAPI as a fallback. Poll each video task with beatra.tasks.get until terminal.

6. Deliver the clips in photo order with actual dimensions, duration, usage, and billing.net_charged_credits. Review board identity, motion, and must-keep drift. Never invent a stitch, concat, or editor tool.

Decisions that require confirmation

Planning and live price quotes are free. They are not approval. Video animate needs the six-field card above. File access is not consent to reuse a photo outside this board set.

Recovery

Each paid photo has its own frozen payload and ID. Recover a lost create response only with that photo's identical payload. Recover a lost task ID through beatra.tasks.list and beatra.tasks.get. Call beatra.tasks.cancel only when the user asks to cancel that photo; on 409 keep polling. On insufficient_balance, keep the top-up URL inside the balance error exact and retry the same frozen ID only after the user says they have topped up. If a create returns no task_id, do not poll; reconcile before minting a new ID. A changed photo, prompt, duration, or model is new work and a new card.

Execution

Invoke every remote Beatra operation only through this package's bundled scripts/mcp_client.py. Put the MCP tool name after call and send one JSON object on standard input.

bash

python3 scripts/mcp_client.py call beatra.models.list

json

{"capability": "image_to_video"}

Do not configure or call a host Beatra Connector, and do not use REST/OpenAPI as a fallback.

If the tool returns insufficient credits: give the user the tool message in full. Do not change the URL. You may translate the other words. Do not replace it with your own top-up copy. Point the user to pay using that message.

Account balance

When the user asks how many credits remain or whether a live estimate fits, call beatra.wallet.get. When they ask what was charged, call beatra.wallet.ledger. Both are read-only. Do not invent an account-balance or top-up tool. Do not make wallet.get a required step before every paid submit.

When a model card comes back carrying a top_up block, relay its tiers as the card lists them and in that order. Do not rank them, do not talk one down, and do not pick one for the user. Which tier suits them is their call, made on the wallet page with the whole list in front of them. Never quote a tier from memory.

References by task

• For clip plans, payloads, confirmation, polling, recovery, and review, read Blackboard one-shot workflow.
• For authorization and the non-billable registration step, read installation and authentication and installation registration.
• For shared task, billing, and connection details, read tasks and results, billing, errors, and recovery, and Bundled MCP Client diagnostics.
• Updates and security: updates and security
• For removal, read uninstall and disconnect.

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.