# M14-04C Status

status: done  
task: Chromium mouse/touch/pen pointer identity and cancellation contract  
updated: 2026-08-19 America/New_York  
enablingTask: false  
parityStateChange: false

## Scope

The main-thread and Offscreen viewport paths now record a shared pointer observation for mouse,
touch, and pen input. Pointer identity, pressure, tilt, button/buttons and `pointercancel` are
preserved with bounded values; unknown pointer types and invalid IDs fail closed. Chromium production
events verified down/cancel pairs for all three pointer types. Firefox/WebKit are excluded.

## Evidence

- `npm --prefix web run build` passed.
- `npm --prefix web run test:chromium-pointer-contract` passed: 2 protocol tests and real Chromium
  mouse/touch/pen down/cancel events.
- Checker output: `chromium-pointer-ok types=mouse,touch,pen cancel=PASS execution=DISABLED next=M14-04D`.
- `npm --prefix web run typecheck` and `git diff --check` passed.

## Next Task

`M14-04D`: Chromium IME composition guard for incomplete operators.