One approved window
Windows presents the capture picker and the user approves a specific application window. Switching sources requires a new approval.
A Claude Desktop extension for Windows
Share one window. Keep control.
Koga Lens lets Claude inspect the latest frame from one Windows application that you explicitly select and approve. Capture stays local until the frame is handed to Claude Desktop.
Download Koga Lens 0.2.7
Install the .mcpb through Claude Desktop → Settings → Extensions, then fully quit and relaunch Claude Desktop.
Requires Windows 10 or 11 and Claude Desktop. Current verified build: Koga Lens 0.2.7.
SHA-256: CDF0A8000C0152D92985A722F7965162AA5B2C21477D7CA19AA3911B7CC41CD3
Only this window
The user selects the source through the Windows capture picker. Claude cannot silently choose another window, process, file, or path.
SharingLatest frame only · explicit state
Designed around consent
A narrow view, with visible boundaries.
Koga Lens exposes one parameter-free tool, GetCurrentView. The user—not Claude—chooses the approved window.
Local capture
Koga Lens has no cloud relay, telemetry, or upload of its own. The current frame is processed locally before being returned through Claude Desktop.
Latest frame only
Frames older than the two-second maximum age return FRAME_STALE with no image, rather than being presented as current.
Visible state
Sharing, Paused, Stopped, SourceLost, and stale conditions are explicit so the absence of a current view is not ambiguous.
Verifiable bytes
The diagnostic panel previews the exact decoded image bytes returned in the most recent response and compares hashes across the response and audit record.
No automatic saving
The latest frame is transient and in memory. Saving the exact returned bytes requires a deliberate user action and a user-chosen path.
Two different products
Koga Lens is not Koga Browser.
They share the Koga name and Notavello home, but they solve different problems on different platforms.
Koga LensA Windows application and Claude Desktop MCP extension for inspecting one user-approved window.
Koga BrowserA separate minimalist web browser available for mobile platforms.
Documentation
Review the evidence and boundaries.
The documentation separates verified behavior, security posture, and remaining submission work.
Submission readiness
Current status, remaining gaps, distribution options, and the ordered path toward a directory submission.
Read submission readiness →Security review
Consent, trust boundaries, stale-frame protection, diagnostic provenance, and prompt-injection posture.
Read the security review →Live verification
Observed 0.2.7 results across Notepad and browser windows, including frozen-frame regressions.
Read live verification →Privacy
What Koga Lens captures, retains, sends, and what changes after a frame reaches Claude Desktop.
Read the privacy policy →