This CLI finds chats and transfers images by controlling a signed-in desktop messenger window. Instead of a person locating each control, a Rust program accepts command-line requests and sends keyboard input and Windows messages. The signed-in app and an available desktop are still required.
The work began with a question about operating entirely through commands, then moved on to sending and downloading an image. The source and historical validation records distinguish the request accepted by the CLI from the work performed in the window. I read those records without opening the messenger or rereading conversations or attachments.
The command calls Windows controls
The control engine in this implementation uses Rust and Windows APIs. It finds windows and child controls, activates the target window and sends input. It does not submit message text through a separate messaging-service API. It uses the desktop app's existing signed-in session rather than moving login information elsewhere.
The historical statement that no desktop click tool was used needs that context. CLI commands initiated the actions, while the Rust program still used native keyboard input and mouse messages. Packaging the sequence as a command does not remove its dependence on the foreground window or input focus.
Check the exact window after searching
Selecting an open chat requires a unique window with an exactly matching title and an input control. Multiple open windows with that name cause the operation to stop. Searching also requires identifiable search and list controls; after opening a result, the tool checks that the exact-title chat is in the foreground. Before input, it rechecks the window handle, process and title.
The room-list command shows open chats; the read command retrieves only conversations loaded by the app. Neither provides a full-history search or continuous monitoring. Opening or reading a chat may change its read state, an effect that a read command’s documentation needs to explain.
Restore the clipboard without overwriting a new copy
Text entry temporarily uses the clipboard for an actual paste. The source keeps supported text, HTML and RTF formats in memory. It stops before changing the clipboard if it encounters image or file formats whose restoration has not been verified. Keeping a single string would not preserve every clipboard format.
Restoration checks the clipboard sequence number. If another program has copied something during the operation, the tool does not overwrite that newer content with its old snapshot; it reports the restoration failure. A restoration failure after input also stops sending. Input may already have occurred, so stopping is not a rollback of every screen state. The CLI's own execution lock does not block a person or another app from using the keyboard.
“Last image” still has a layout-dependent meaning
The image-download command moves to the end of the conversation list, then sends mouse messages at a relative position adjusted for the window's DPI to open the viewer. It does not select an attachment by reading its identifier from conversation data. The verified scope was the latest outgoing landscape image at the bottom right, using a 1000×640 PNG test image.
That record does not establish selection of incoming images or other sizes and layouts. Saving the image is a separate operation after the viewer opens. A short command name such as download-last-image does not collapse selection and saving into the same check. A different app layout first needs evidence that the selected position still points to the intended image.
Verify the path and bytes after entering a filename
The save function requires an absolute path and refuses to overwrite an existing file. It finds a save dialog owned by the viewer, pastes the path and reads the input back to check that it matches the requested value. It then checks for a nonempty file at that path and returns its byte count and SHA-256.
The historical validation also records a save-path failure that left a test file in the default download folder. The input handling was corrected, and saving directly to the requested path was subsequently confirmed. The report records matching bytes and hashes for the source and downloaded files. Sending was tested through individual CLI stages, while the integrated download command was separately verified. That does not establish a fresh test of the complete integrated sending command.
Read the command result alongside the conversation
Early text-send attempts left text in the input field without adding it to the conversation. The records describe a later keyboard-input correction; the source I read uses an actual paste and an Enter key event after focus checks. The test text was separately checked in the conversation, rather than treating an input function's completion as proof of sending. That observation still does not establish another person's receipt or read status.
Rust performs the window control in this implementation. Python supplies a helper for creating the synthetic test image. This article compares source, that generator and historical aggregate reports; I did not operate the original conversations, attachments, clipboard or app. The current installation, other layouts and all file formats were not freshly reviewed. For another desktop CLI, begin with the conditions below.
- Name the required session, desktop and foreground-window conditions.
- Recheck the target's window and process relationship, beyond its title.
- Define preservation limits for resources shared with other work, such as the clipboard.
- Check image selection separately from saving.
- Compare command results, changes inside the app and the actual saved file.