export-download-debugging
Diagnose and fix browser, preview, or Electron export/download failures, especially image export issues involving Save As, Blob/Data URLs, the File System Access API, createWritable failures, and 0 KB files.
Profile →npx skills add nexu-io/open-design --skill export-download-debugging --agent claude-code
Same command for any agent — swap --agent for codex, cursor, copilot.
Weekly change comes from our own snapshots, not the repository page — it measures attention, not adoption.
# Export Download Debugging Use this when an export or download appears to run but produces an empty, missing, or unusable file. It is tuned for browser previews, iframe capture, and Electron shells. ## Core rule Separate capture from save. Prove the export payload has non-zero bytes before debugging the destination path. A 0 KB file often means the native picker or host created the target file, then the write failed or was blocked. ## Evidence - Record the payload type, MIME type, byte length, object URL or data URL path, and thrown error name/message. - Check browser console output and app logs around `showSaveFilePicker`, `createWritable`, `<a download>`, `URL.createObjectURL`, and URL revocation. - In Electron, inspect the `will-download` path: filename, MIME, file extension, save dialog filters, cancellation, and final file size. - Confirm the actual downloaded file size on disk and whether it opens in a normal image viewer. ## Fix order 1. Prepare and validate the export payload first; disable Save until bytes are available. 2. Prefer the simplest stable save channel for the host. If `showSaveFilePicker().createWritable()` fails, is sandboxed, or creates empty files, route to
- Core rule
- Evidence
- Fix order
- Validation
What does the export-download-debugging skill do?
Diagnose and fix browser, preview, or Electron export/download failures, especially image export issues involving Save As, Blob/Data URLs, the File System Access API, createWritable failures, and 0 KB files.
How do I install it?
Run `npx skills add nexu-io/open-design --skill export-download-debugging --agent claude-code` — it drops the skill into your project so the agent can pick it up. Swap the --agent value for codex, cursor or copilot if you use one of those.
Where does this skill come from?
From nexu-io/open-design, a repository with 83,577 stars. We read it straight from the repository tree rather than a submitted listing, so what you see here is what is actually published.
Is a popular skill a good skill?
Not necessarily. Stars measure attention, not adoption — a repository can trend for a week and be abandoned. That is why we show the weekly change from our own snapshots next to the total, instead of a single flattering number.