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Changeset 0.21.3 (#89)

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xcaliber
2026-03-01 18:20:01 +00:00
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CHANGELOG.md
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All notable changes to Chat Switchboard.
## [0.21.3] — 2026-03-01
### Added
- **Surface Registry (`surfaces.js`).** Mode-switching system that allows extensions to register "surfaces" (UI modes) that take over named regions of the interface. DOM nodes are detached and preserved in `DocumentFragment`s during mode switches — not destroyed — ensuring CM6 editor instances and other stateful components survive transitions.
- **Surface region attributes.** Four `data-surface-region` attributes on `index.html` containers: `surface-header` (model bar), `surface-main` (chat messages), `surface-footer` (input area), `sidebar-content` (search + chat history). Extensions swap these regions via `ctx.ui.replace()` / `ctx.ui.restore()`.
- **Mode selector.** Appears in the sidebar (`#modeSelectorWrap`) when ≥1 extension surface is registered beyond the default chat. Shows icon buttons for each mode with active state highlighting.
- **Extension context API.** `ctx.surfaces.register()`, `ctx.surfaces.unregister()`, `ctx.surfaces.activate()`, `ctx.surfaces.getCurrent()` on the scoped extension context. `ctx.ui.replace()` and `ctx.ui.restore()` for region DOM management.
- **Surface events.** `surface.activated`, `surface.deactivated`, `surface.registered`, `surface.unregistered` on the EventBus (all `localOnly`).
- **REPL console (`repl.js`).** Fourth tab in the debug modal (Ctrl+Shift+L). `AsyncFunction` wrapper for top-level `await`. Injected globals: `API`, `Events`, `Extensions`, `Surfaces`, `DebugLog`, `Panels`, `UI`, plus `$()`, `$$()`, `sleep()` helpers. Features: collapsible JSON pretty-printing, red errors with expandable stack traces, command history via ↑/↓ (persisted to sessionStorage), tab-completion on live object graphs and EventBus labels, multi-line input (Shift+Enter), admin-gated (admin role OR `?debug=1` URL param).
- **CSS.** Mode selector styles (`.mode-selector`, `.mode-btn`, active/hover states). REPL styles (output formatting, value-type color coding, collapsible JSON, input prompt).
### Changed
- `extensions.js` context builder: added `ctx.surfaces` namespace and `ctx.ui.replace()` / `ctx.ui.restore()` methods.
- `app.js` startup: initializes `Surfaces.init()` before `Extensions.loadAll()`, and `REPL.init()` after auth confirmation.
- `index.html`: added `data-surface-region` attributes, mode selector container, REPL tab in debug modal, script tags for `surfaces.js` and `repl.js`.
- `EXTENSIONS.md` §6: updated with implementation details, actual API signatures, and event catalog.
## [0.21.2] — 2026-03-01
### Added