name: uploading-to-cloudup
description: Use when an image or screenshot needs a hosted Cloudup URL for markdown in a PR comment, GitHub issue, or chat response. Works for local files, MCP image blocks, and data URLs. Plain chat attachments only work if their bytes are available as an MCP image block. Keep communication minimal: only ask for a usable path/input when needed.
Uploading Images To Cloudup
Cloudup uploads are public, paid x402 uploads. Use the plugin:cloudup:cloudup MCP server when a local or in-conversation image needs a public URL.
Communication
- Do not narrate upload mechanics, SKU routing, tool choices, or internal reasoning.
- Do not ask for confirmation before uploading. Path-confinement and MIME safeguards in the hook guard against filesystem exfiltration; image-content evaluation is not the agent's job.
- After success, return the complete
markdown field verbatim plus a short parenthetical with sku and expires_at.
- On failure, surface the tool error and the next required user action. Do not add background unless it helps the user decide.
- Do not explain failed path guesses, filename quirks, temp-file workarounds, or retries unless the final result is an error the user must act on.
Pick The Tool
Use exactly one of these paths:
- In conversation with tool-callable bytes: call
mcp__plugin_cloudup_cloudup__upload_image with image or image_data_url.
- On disk: call
mcp__plugin_cloudup_cloudup__upload with path.
If the user supplied an attached/pasted image such as [Image #1] but the bytes are not available as an MCP image block or data:image/... URL:
- If source metadata gives a filesystem path AND the filename does NOT look like a macOS screenshot with a timestamp in the name, pass that path directly to
upload(path). Do not pre-verify with Bash or Read; the hook validates the path and reports errors itself.
- Otherwise, ask for a saved path. Say only:
I need a saved image path under $HOME, $TMPDIR, or /tmp to upload this.
The macOS-screenshot exception exists because timestamp-formatted screenshot filenames may contain invisible Unicode characters that Claude cannot faithfully reproduce when emitting a path string — for example, U+202F (narrow no-break space) before am/pm on macOS Sequoia. The exact format varies by locale, time-format settings, and macOS version, but the failure mode is the same: a transcribed path will silently miss the real file, or hit a stale/wrong file with a similar visible name. Recognize macOS screenshots by cues like a "Screenshot" prefix (in any locale), a date/time-shaped pattern in the name, or a path under ~/Screenshots/~/Desktop. Err on the side of asking when uncertain.
Do not search the filesystem by visible filename, copy, rename, or stat to work around a missing path. Do not use Bash for attached images unless source metadata supplied the path.
Do not call begin_upload, complete_upload, or quick_upload directly. Do not write in-conversation images to disk just to use upload(path). If upload_image fails for an in-conversation image, report that error instead of falling back to local file probing.
Path 0: In-Conversation Image
Use only when the image bytes are available to pass to the tool: an MCP image block or a data:image/...;base64,... URL.
Call mcp__plugin_cloudup_cloudup__upload_image with exactly one:
image: <MCP image content block verbatim>image_data_url: "<data:image/...;base64,...>"
Optional: pass alt for custom markdown alt text.
Never use Path 1 for this case unless the user explicitly provides a filesystem path. If the image is visible in chat but not available as an MCP block/data URL, ask for a saved path instead.
Path 1: Local File
Use for an image already saved on disk.
Call mcp__plugin_cloudup_cloudup__upload:
- Required:
path, absolute or ~/...
- Optional:
stream_id, stream_title
The hook validates path and MIME before uploading. Allowed paths resolve under $HOME, $TMPDIR, or /tmp. Default MIME allowlist is image/*.
Result Handling
Successful responses include markdown, direct_url, content_type, size_bytes, sku, and expires_at.
The tool response is the only source of truth for URLs. Never invent, infer, sanitize, shorten, or example-fill a Cloudup URL. If the tool did not return a real markdown value, stop and report the missing field as an upload error.
Use markdown for the user-visible result. Do not replace it with direct_url, shorten it, summarize it, or remove alt text.
After success, return exactly two lines:
- Line 1: the full
markdown value copied verbatim from the tool response.
- Line 2:
Uploaded to Cloudup ( followed by the exact sku and expires_at values from the tool response. Use this shape: Uploaded to Cloudup (<sku>, expires <expires_at>).
If embedding in a PR/body, paste the markdown field verbatim in the target content and keep any surrounding note brief.
Failures
- Tool/server missing: tell the user to run
/cloudup-setup or restart Claude Code after plugin setup.
- Attached image bytes unavailable: ask for a saved image path under
$HOME, $TMPDIR, or /tmp.
- Path outside allowed roots: ask the user to move the file under
$HOME, $TMPDIR, or /tmp; do not copy it yourself.
- MIME refused: say the file type was not accepted; do not work around it unless the user changes
CLOUDUP_ALLOWED_MIME.
- Spending cap exceeded: stop; the user can raise
CLOUDUP_MAX_USD.
- Insufficient balance: retry once on staging; if it still fails, surface the message.
complete_upload failed ... upload_id: do not retry upload(path). Surface upload_id; recovery is complete_upload with that ID.- Network error: retry once, then surface the error.
Never silently retry failures that can create another paid upload.
