kua-agentandClaude Fable 5.1
723cd7dcea
isWritableDirectory (permissions bits) is not enough: a OneDrive Files-On-Demand directory whose provider domain is signed out can report as existing and POSIX-writable while an actual write fails. probeWritable writes a small ".redline-probe-<uuid>" file into the folder via AtomicFile.write (open+write+fsync+rename+directory-fsync), then removes it; any failure at write, fsync, or removal means false. Three unit tests: an ordinary writable directory (true, and no probe file left behind), a chmod 500 directory (false; permissions restored in teardown), and a plain file path (false). Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_012ZiTXPbPCSjzPVsfoweAbp
Redline
A macOS menu-bar app that captures a remembered screen region, builds a one-screenshot-per-page PDF, AirDrops it to an iPad for markup, then watches for the annotated file to come back.
Hotkeys
- ⌥⇧1 — pick a new region, then capture it.
- ⌥⇧2 — capture the remembered region instantly (no picker).
Screen Recording permission
On first launch macOS asks once for Screen Recording. Grant it at System Settings > Privacy & Security > Screen Recording. You never have to do this again as long as the app is not re-signed with a different identity.
The grant is bound to the bundle identifier ai.flowmaster.shotdeck plus the code signature. Changing either one forces a fresh prompt.
Build
swift build && swift test
./scripts/build-app.sh # signed .app for daily use
open .build/Redline.app