BUG: Cmd+A (and likely Ctrl+A) does not select all text in the chat textbox

[jeonghun-jj-lee]

Summary

On macOS, pressing Cmd+A inside the Amicode chat textbox does not select all
text. The standard "select all" keyboard shortcut appears to be intercepted or
unhandled, leaving the text unselected. Ctrl+A is likely affected too (unconfirmed).

Context

• Extension: harmoniqs.amicode 0.2.1
• OS: macOS (Darwin 25.5.0, arm64)
• Engine: opencode v1.18.10, vendored tag v1.18.10-amicode.4
• Happening in normal chat use — typing a message and attempting to select
  the full input with Cmd+A before editing or replacing it.

Expected vs actual

Expected: Cmd+A selects all text in the chat textbox, as it does in any
standard text input on macOS.
Actual: Cmd+A does not select any text; the input is unaffected.

Diagnostics

• No active run at time of report
• No absolute paths, no binary uploads

---

intake: not-ready — mature per the maturity contract before picking up
suggested_path: A
diagnostics: inline
upstream: n/a

[jeonghun-jj-lee]

Fixed upstream in harmoniqs/opencode#126 (merged) — extends the global editing fallback to handle Cmd+A (select-all), Cmd+Z (undo), and Cmd+Shift+Z/Cmd+Y (redo) in the framed webview. Will land in the next opencode vendor bump.