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feat(tui): add overlay compositing for ctx.ui.custom() (#558)

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Adds overlay rendering capability to the TUI, enabling floating modal
components that render on top of existing content without clearing the screen.

- Add showOverlay(), hideOverlay(), hasOverlay() methods to TUI
- Implement ANSI-aware line compositing via extractSegments()
- Support overlay stack (multiple overlays, later on top)
- Add { overlay: true } option to ctx.ui.custom()
- Add overlay-test.ts example extension

Also fixes pre-existing bug where bash tool output cached visual lines
at fixed terminal width, causing crashes on terminal resize.

Co-authored-by: Nico Bailon <nico.bailon@gmail.com>
This commit is contained in:
Mario Zechner 2026-01-08 22:40:42 +01:00
parent 121823c74d
commit f9064c2f69
8 changed files with 488 additions and 48 deletions
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packages/coding-agent/CHANGELOG.md
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@ -16,6 +16,7 @@
- Built-in renderers used automatically for tool overrides without custom `renderCall`/`renderResult`
- `ssh.ts` example: remote tool execution via `--ssh user@host:/path`
- Wayland clipboard support for `/copy` command using wl-copy with xclip/xsel fallback ([#570](https://github.com/badlogic/pi-mono/pull/570) by [@OgulcanCelik](https://github.com/OgulcanCelik))
- `ctx.ui.custom()` now accepts `{ overlay: true }` option for floating modal components that composite over existing content without clearing the screen ([#558](https://github.com/badlogic/pi-mono/pull/558) by [@nicobailon](https://github.com/nicobailon))
### Fixed