--- name: chompute-bg-remover description: >- Remove image backgrounds using Chompute's API, producing transparent PNG output. Use when the user asks to "remove background", "make background transparent", "extract subject from image", "cut out the background", "make a PNG with no background", or any task involving background removal from an image file or image URL. Do NOT use for general image editing, cropping, resizing, or format conversion. --- # Chompute Background Remover Removes the background from an image and produces a transparent PNG. ## Prerequisites This skill requires a Chompute Access Key. Check for the key in this order: 1. `CHOMPUTE_API_KEY` 2. `CLAUDE_PLUGIN_OPTION_chompute_api_key` 3. `CLAUDE_PLUGIN_OPTION_CHOMPUTE_API_KEY` 4. `chompute_key.txt` in this skill's directory (same folder as this SKILL.md) If none of these exists or the value is empty, tell the user: > You need a Chompute Access Key. Sign up and get one at: > https://chompute.ai/skills > > Then set `CHOMPUTE_API_KEY`, configure the plugin's Chompute Access Key option, > or save your key to: `/chompute_key.txt` Stop and do not continue without a valid key file. If a valid key is present, use it without printing it and tell the user: > Valid Access Key present. Proceeding... ## Workflow 1. **Read the input image** attached or mentioned in the message. Do NOT automatically pick images from the folder. The image must be mentioned or attached by the user. The input may be either: - a local image file path, or - a direct HTTP(S) image URL If there is no image attached, mentioned, or linked, tell the user the following and then stop: > Please attach, mention, or provide an image URL whose background you want removed. 2. **Prepare the API input**: - If the input is a local file, base64-encode the file contents and send a `data:;base64,` value in `image_url`. - If the input is an HTTP(S) image URL, pass that URL directly in `image_url` without base64-encoding it yourself. 3. **Call the Chompute API** using the contract below. Use whatever HTTP method is available in the environment (curl, python, node, etc.). 4. **Parse the response.** On success, extract the output image base64 string and decode it to bytes. - If the input was a local file, save the output as `_output.png` in the same directory as the input image file. - If the input was an image URL, derive the file name from the URL path and save the output in the current working directory as `_output.png`. If the URL does not contain a usable file name, use `chompute_output.png`. 5. **On error**, show the error details to the user. If the API returns 401, tell the user their Access Key may be invalid or expired and direct them to https://chompute.ai to check their account. ## API Contract ### Request ``` POST https://chompute-services.dragonfruit.ai/openai/v1/responses Content-Type: application/json Authorization: Bearer ``` Body: ```json { "model": "apple_vision_bg_removal", "input": [ { "role": "user", "content": [ { "type": "input_image", "image_url": "" } ] } ] } ``` Where `` is either: - `data:;base64,` for a local file, or - a direct HTTP(S) image URL ### Response The response JSON contains an `output` array. Find the object where `type` is `"image_generation_call"` — its `result` field holds the base64-encoded PNG output. Example (truncated): ```json { "output": [ { "type": "image_generation_call", "result": "iVBORw0KGgo..." } ] } ``` Decode the `result` value from base64 to get the PNG bytes.

chompute-bg-remover

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