publ Reference

messenger_room_thumbnail_apply

Upload one room image in the Messenger app (pApp D00003). Requires change {action:"upload"}. Upload from this computer: target upload {kind:"local-file", filename, byteLength, sha256} returns one presigned PUT with its headers and the console room screen link; send the file, then call again with upload {kind:"complete", uploadId, parts:[{partNumber:1, etag}]}. The server never receives the file or downloads a link. Write: uploads to storage only; no room changes. Use the taskId as uploadTaskId in messenger_room_create_apply (no roomUuid) or messenger_room_thumbnail_replace_apply (same roomUuid). A lost receipt stays pending and is never resent; task_resume only observes, and prepared work needs the identical apply. Called without confirmToken it previews and returns a confirmToken; repeating the same input with it executes once.

Inputs

Field	Required here	Contract
`target`	Yes	object; upload: start with {kind:"local-file", filename, byteLength, sha256} for a PNG, JPEG or GIF up to 10 MiB (bridge limit; the console sets none) on this computer, send it with the returned PUT, then finish with {kind:"complete", uploadId, parts}. A Google Drive or other link must be downloaded to this computer first. Add roomUuid for an existing basic group; omit it for a new room.
`target.upload`	Yes	one of: `local-file`, `more-parts`, `complete`, `cancel` (by `kind`)
`target.upload.filename`	Yes	When `target.upload.kind` is `local-file`: string; min length 1; max length 240; pattern `^[^/\\:\x00-\x1f\x7f]+$`; The name of the file on this computer, with its extension.
`target.upload.byteLength`	Yes	When `target.upload.kind` is `local-file`: integer; greater than 0; The exact file size in bytes (for example from `wc -c < FILE` or `stat`).
`target.upload.sha256`	No	When `target.upload.kind` is `local-file`: string; pattern `^[0-9a-f]{64}$`; The SHA-256 of the file in lowercase hex (shasum -a 256 FILE). Required when the upload answers UPLOAD_CHECKSUM_REQUIRED.
`target.upload.uploadId`	Yes	When `target.upload.kind` is `more-parts`: string; pattern `^upl_[A-Za-z0-9_-]{22}$`
`target.upload.fromPart`	Yes	When `target.upload.kind` is `more-parts`: integer; minimum 1; maximum 10000
`target.upload.uploadId`	Yes	When `target.upload.kind` is `complete`: string; pattern `^upl_[A-Za-z0-9_-]{22}$`
`target.upload.parts`	Yes	When `target.upload.kind` is `complete`: array; min items 1; max items 10000
`target.upload.parts[].partNumber`	Yes	When `target.upload.kind` is `complete`: integer; minimum 1; maximum 10000
`target.upload.parts[].etag`	Yes	When `target.upload.kind` is `complete`: string; min length 1; max length 200
`target.upload.measured`	No	When `target.upload.kind` is `complete`: object; What the video measures on this computer, read with measureCommand.
`target.upload.measured.durationSeconds`	Yes	When `target.upload.kind` is `complete`: number; maximum 1000000; greater than 0; Video duration in seconds (ffprobe format.duration).
`target.upload.measured.frameRate`	Yes	When `target.upload.kind` is `complete`: number; maximum 1000; greater than 0; Frames per second (ffprobe avg_frame_rate, for example 30000/1001 = 29.97).
`target.upload.measured.width`	Yes	When `target.upload.kind` is `complete`: integer; maximum 100000; greater than 0
`target.upload.measured.height`	Yes	When `target.upload.kind` is `complete`: integer; maximum 100000; greater than 0
`target.upload.measured.frameRateMode`	No	When `target.upload.kind` is `complete`: `CFR`, `VFR`; Constant or variable frame rate, when the tool reports it.
`target.upload.measured.minFrameRate`	No	When `target.upload.kind` is `complete`: number; maximum 1000; greater than 0
`target.upload.measured.maxFrameRate`	No	When `target.upload.kind` is `complete`: number; maximum 1000; greater than 0
`target.upload.uploadId`	Yes	When `target.upload.kind` is `cancel`: string; pattern `^upl_[A-Za-z0-9_-]{22}$`
`target.roomUuid`	No	string; pattern `^[A-Za-z0-9_-]{1,200}$`
`change`	Yes	object
`change.action`	Yes	`upload`
`confirmToken`	No	string; pattern `^ct[a-f\d]{32}$`; The confirmToken from this tool's preview result. Omit it to preview; repeat the same input with it to execute.