feat: initial commit — extracted from comfy-cloud

Anything-can-drive-the-UI command bus. Single dispatch point for LLM tool
calls, scripts, and (optional) WebSocket remote control. JSON canonical
form plus a plain-text DSL sugar layer. Includes a visible virtual cursor
that animates to elements before commands act on them.

Modules:
- bus.ts        — CommandBus class, dispatch, handlers, vars, history,
                  listActions, readState. Built-in handlers: navigate, click,
                  fill, submit, select, wait, wait_for, scroll, read, expect,
                  set
- parser.ts     — DSL ↔ JSON, with quoted values, # comments, # speed:
                  directive, $name = <cmd> assignment, $var interpolation,
                  expect assertions
- script.ts     — script runner; loads /scripts/<name>.script, supports
                  sub-scripts via `run` command
- cursor.ts     — virtual cursor + ripple, speed-controlled, aria-hidden
- provider.tsx  — React glue: registers `navigate` via react-router, mounts
                  cursor, exposes window.commandBus / runScript /
                  runScriptText for console use
- ws.ts         — optional WebSocket producer (connectCommandSocket)
- llm-bridge.ts — buildSystemPrompt (DSL ref + live action snapshot),
                  extractActionBlocks, runActionBlocks, estimateTokens,
                  trimMessages
- index.tsx     — barrel re-exports

Peer deps: react, react-router (consuming app provides).

Originally inline in `comfy-cloud/app/lib/`. Extracted as part of the
crema-app-aifirst-template scaffolding.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/index.tsx

@@ -0,0 +1,30 @@
+// PURPOSE: Anything-can-drive-the-UI command bus. Single dispatch point for
+//          LLM tool calls, scripts, and remote control. JSON canonical form
+//          plus a plain-text DSL sugar layer. Includes a visible "virtual
+//          cursor" that animates to elements before commands act on them, so
+//          LLM-driven sessions are legible to a watching human.
+// ===========================================================================
+// EXPORTS
+// Bus:        commandBus (singleton), CommandBus (class)
+// Types:      Command, Handler, HandlerContext, DispatchOptions,
+//             ActionDescriptor, HistoryEntry
+// Parser:     parseScript, parseLine, stringifyScript, ScriptOptions, ParsedScript
+// Runner:     runScript, runScriptText, RunScriptOptions
+// Cursor:     ensureCursor, showCursor, hideCursor, removeCursor,
+//             moveCursorTo, moveCursorToElement, clickRipple, setCursorSpeed
+// Provider:   CommandBusProvider — registers `navigate` via react-router,
+//             mounts the cursor, exposes window.commandBus
+// WebSocket:  connectCommandSocket, CommandSocket
+// LLM bridge: buildSystemPrompt, extractActionBlocks, runActionBlocks,
+//             estimateTokens, trimMessages, RunActionBlocksResult,
+//             SystemPromptContext
+// ===========================================================================
+"use client";
+
+export * from "./bus"
+export * from "./parser"
+export * from "./script"
+export * from "./cursor"
+export * from "./ws"
+export * from "./llm-bridge"
+export { CommandBusProvider } from "./provider"