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{\n  type CallToolResult,\n  type JsonObject,\n  type JsonRpcMessage,\n  type JsonRpcRequest,\n  type JsonRpcId,\n  type RegisteredTool,\n  type ServerCapabilities,\n  type ServerInfo,\n  type ToolDefinition,\n  type ToolHandler,\n  JSONRPC_INTERNAL_ERROR,\n  JSONRPC_INVALID_PARAMS,\n  JSONRPC_METHOD_NOT_FOUND,\n  MCP_PROTOCOL_VERSION,\n} from \"./types\";\nimport { ToolRegistry } from \"./tool-host\";\n\nexport type McpServerOptions = {\n  info: ServerInfo;\n  /** Defaults to { tools: { listChanged: true } } */\n  capabilities?: ServerCapabilities;\n  /** Free-text instructions surfaced to clients during initialize. */\n  instructions?: string;\n  /**\n   * The protocol revisions this server speaks, NEWEST FIRST.\n   *\n   * `initialize` echoes the client's requested revision when it is in this\n   * list, and answers the first entry otherwise — the spec's rule, which leaves\n   * the client to decide whether it can live with the answer.\n   *\n   * Defaults to `[MCP_PROTOCOL_VERSION]`: one revision, answered whatever the\n   * client asks, which is exactly what this server did before the option\n   * existed. Only list a revision the tools you register are correct under.\n   */\n  protocolVersions?: readonly string[];\n};\n\nexport type Transport = {\n  /** Called by the server when it has a message to deliver to the client. */\n  send: (message: JsonRpcMessage) => void;\n  /** Called by the server when it's torn down so the transport can clean up. */\n  close?: () => void;\n};\n\n/**\n * MicroMcpServer — protocol-level MCP server, transport-agnostic.\n *\n * Use it like:\n *\n *   const server = new MicroMcpServer({ info: { name: \"session\", version: \"0.1\" } });\n *   server.registerTool({ name: \"...\", inputSchema: { type: \"object\" } }, async (args) => ({...}));\n *   const transport = new InProcessTransport();\n *   server.attach(transport);\n *   transport.deliver({ ... }); // client → server frames\n *\n * The same server can serve multiple transports (e.g. an in-process agent\n * AND a relayed external client) by attaching each one.\n */\nexport class MicroMcpServer extends ToolRegistry {\n  private transports = new Set<Transport>();\n  /**\n   * Transports owed a `tools/list_changed` at the end of this tick. Empty when\n   * none is scheduled. See {@link scheduleListChangedNotification}.\n   */\n  private listChangedOwed = new Set<Transport>();\n\n  readonly info: ServerInfo;\n  readonly capabilities: ServerCapabilities;\n  readonly instructions?: string;\n  readonly protocolVersions: readonly string[];\n\n  constructor(options: McpServerOptions) {\n    super();\n    this.info = options.info;\n    this.capabilities = options.capabilities ?? { tools: { listChanged: true } };\n    this.instructions = options.instructions;\n    if (options.protocolVersions && options.protocolVersions.length === 0) {\n      // No answer exists for a client's initialize. Fail here, next to the\n      // mistake, rather than in a handshake nobody is watching.\n      throw new Error(\"MicroMcpServer: protocolVersions is empty — a server must speak at least one protocol revision.\");\n    }\n    this.protocolVersions = options.protocolVersions ? [...options.protocolVersions] : [MCP_PROTOCOL_VERSION];\n  }\n\n  attach(transport: Transport): () => void {\n    this.transports.add(transport);\n    return () => this.detach(transport);\n  }\n\n  detach(transport: Transport): void {\n    if (this.transports.delete(transport)) {\n      transport.close?.();\n    }\n  }\n\n  unregisterTool(name: string): void {\n    if (this.tools.delete(name)) {\n      this.scheduleListChangedNotification();\n    }\n  }\n\n  protected onToolsChanged(): void {\n    this.scheduleListChangedNotification();\n  }\n\n  /**\n   * Receive a JSON-RPC frame from a client (called by the transport).\n   * The transport is responsible for sending the response back.\n   */\n  async receive(transport: Transport, message: JsonRpcMessage): Promise<void> {\n    if (!(\"method\" in message)) return; // It's a response, not a request — ignore.\n\n    const isNotification = !(\"id\" in message);\n    if (isNotification) {\n      // Notifications are fire-and-forget. We ignore unknown methods.\n      return;\n    }\n\n    const request = message as JsonRpcRequest;\n    try {\n      const result = await this.handle(request, transport);\n      transport.send({ jsonrpc: \"2.0\", id: request.id, result });\n    } catch (err) {\n      transport.send({\n        jsonrpc: \"2.0\",\n        id: request.id,\n        error: this.toRpcError(err),\n      });\n    }\n  }\n\n  private async handle(request: JsonRpcRequest, transport: Transport): Promise<any> {\n    const { method, params } = request;\n    switch (method) {\n      case \"initialize\":\n        return {\n          protocolVersion: this.negotiate(params?.protocolVersion),\n          capabilities: this.capabilities,\n          serverInfo: this.info,\n          ...(this.instructions ? { instructions: this.instructions } : {}),\n        };\n\n      case \"tools/list\":\n        return { tools: this.listTools() };\n\n      case \"tools/call\": {\n        const name = params?.name;\n        const args = (params?.arguments ?? {}) as JsonObject;\n        if (typeof name !== \"string\") {\n          throw rpcError(JSONRPC_INVALID_PARAMS, \"tools/call requires `name`\");\n        }\n        const tool = this.tools.get(name);\n        if (!tool) {\n          throw rpcError(JSONRPC_METHOD_NOT_FOUND, this.missingToolMessage(name));\n        }\n        const result = await tool.handler(args, { transport });\n        return result satisfies CallToolResult;\n      }\n\n      case \"ping\":\n        return {};\n\n      default:\n        throw rpcError(JSONRPC_METHOD_NOT_FOUND, `Unsupported method: ${method}`);\n    }\n  }\n\n  /** The revision to answer `initialize` with: the one asked for if spoken, else the newest. */\n  private negotiate(requested: unknown): string {\n    return typeof requested === \"string\" && this.protocolVersions.includes(requested)\n      ? requested\n      : this.protocolVersions[0];\n  }\n\n  /**\n   * Tell the transports that SAW the old tool list that it changed.\n   *\n   * Changes in one tick coalesce into one notification. The recipients are the\n   * transports attached at the moment of a change, not at the moment the\n   * notification goes out: a transport attached afterwards never had the old\n   * list, so \"your list is stale\" is noise to it — and on stdio, where a host\n   * builds the server and attaches stdin/stdout in the same tick, it was the\n   * first frame a client received, before it had even sent `initialize`.\n   */\n  private scheduleListChangedNotification(): void {\n    if (this.transports.size === 0) return;\n    const scheduled = this.listChangedOwed.size > 0;\n    for (const t of this.transports) this.listChangedOwed.add(t);\n    if (scheduled) return;\n    queueMicrotask(() => {\n      const owed = this.listChangedOwed;\n      this.listChangedOwed = new Set();\n      for (const t of owed) {\n        // Detached since the change: it is not listening any more.\n        if (this.transports.has(t)) t.send({ jsonrpc: \"2.0\", method: \"notifications/tools/list_changed\" });\n      }\n    });\n  }\n\n  /** Send an application notification to every client, or one attached transport. */\n  notify(message: JsonRpcMessage, transport?: Transport): void {\n    if (transport) transport.send(message);\n    else this.broadcast(message);\n  }\n\n  private broadcast(message: JsonRpcMessage): void {\n    for (const t of this.transports) t.send(message);\n  }\n\n  private toRpcError(err: unknown): { code: number; message: string; data?: any } {\n    if (err && typeof err === \"object\" && \"code\" in err && \"message\" in err) {\n      return err as any;\n    }\n    return {\n      code: JSONRPC_INTERNAL_ERROR,\n      message: err instanceof Error ? err.message : String(err),\n    };\n  }\n}\n\nexport function rpcError(code: number, message: string, data?: any) {\n  return { code, message, ...(data !== undefined ? { data } : {}) };\n}\n\n/**\n * Helper to build a CallToolResult from a string or structured value.\n */\nexport function textResult(text: string, structured?: any): CallToolResult {\n  return {\n    content: [{ type: \"text\", text }],\n    ...(structured !== undefined ? { structuredContent: structured } : {}),\n  };\n}\n\nexport function errorResult(text: string): CallToolResult {\n  return { content: [{ type: \"text\", text }], isError: true };\n}\n\n// Internal helper so the JsonRpcId import isn't dropped by tsup\ntype _KeepIdImport = JsonRpcId;\n","import type { CallToolResult } from \"../mcp/types\";\nimport { emitActivity } from \"./registry\";\nimport type { AgentTarget } from \"./types\";\n\nexport type ActivityAgent = { id: string; name?: string; color?: string };\n\nexport type ActivityResolverContext<TArgs = Record<string, unknown>> = {\n  /** Tool name as registered. */\n  toolName: string;\n  /** Arguments the tool was called with. */\n  args: TArgs;\n  /** The CallToolResult the underlying handler produced. */\n  result: CallToolResult;\n};\n\n/**\n * Resolves an `AgentTarget` for an executed tool. Bridges declare one of\n * these per registration so the wrapper knows which surface / element /\n * screen the activity belongs to.\n *\n * The resolver runs AFTER the tool handler so it can inspect the result\n * (e.g. read a newly-created item id from `structuredContent`).\n */\nexport type ActivityTargetResolver<TArgs = Record<string, unknown>> = (\n  ctx: ActivityResolverContext<TArgs>,\n) => AgentTarget | null;\n\nexport type ToolHandler<TArgs = Record<string, unknown>> = (\n  args: TArgs,\n) => Promise<CallToolResult> | CallToolResult;\n\n/**\n * wrapToolWithActivity — decorate a bridge tool handler so every successful\n * call emits an `AgentActivityEvent`. Returns a new handler with the same shape.\n *\n * Usage in a bridge:\n *\n *   server.registerTool(\n *     definition,\n *     wrapToolWithActivity(\n *       handler,\n *       { agent, kind: \"whiteboard\", resolveTarget: ({ args }) => ({\n *           kind: \"whiteboard\", elementId: args.id as string,\n *         }) },\n *     ),\n *   );\n */\nexport function wrapToolWithActivity<TArgs = Record<string, unknown>>(\n  handler: ToolHandler<TArgs>,\n  options: {\n    toolName: string;\n    agent: ActivityAgent;\n    /** Optional fancy-screens screen id this bridge is scoped to. */\n    screenId?: string;\n    /** Default target kind if the resolver returns one without `kind`. */\n    kind: AgentTarget[\"kind\"];\n    /** Per-call resolver. Return `null` to skip emitting (e.g. for read-only tools). */\n    resolveTarget?: ActivityTargetResolver<TArgs>;\n    /** Optional ttl override. */\n    ttlMs?: number;\n    /**\n     * Build the `meta` broadcast to all relay peers. Defaults to the tool's full\n     * `structuredContent`. Override to REDACT sensitive fields before fan-out —\n     * e.g. the terminal bridge strips raw command/keystroke bytes so a command\n     * line (or its secrets) is never broadcast verbatim to every peer.\n     */\n    buildMeta?: (result: CallToolResult) => Record<string, unknown> | undefined;\n  },\n): ToolHandler<TArgs> {\n  return async (args) => {\n    const result = await handler(args);\n    if (result.isError) return result;\n\n    let target: AgentTarget | null;\n    if (options.resolveTarget) {\n      target = options.resolveTarget({ toolName: options.toolName, args, result });\n    } else {\n      target = { kind: options.kind, screenId: options.screenId };\n    }\n    if (!target) return result;\n\n    emitActivity({\n      agentId: options.agent.id,\n      agentName: options.agent.name,\n      agentColor: options.agent.color,\n      target: { ...target, kind: target.kind ?? options.kind, screenId: target.screenId ?? options.screenId },\n      action: options.toolName,\n      timestamp: Date.now(),\n      meta: options.buildMeta ? options.buildMeta(result) : extractMeta(result),\n      ttlMs: options.ttlMs,\n    });\n    return result;\n  };\n}\n\nfunction extractMeta(result: CallToolResult): Record<string, unknown> | undefined {\n  const sc = result.structuredContent;\n  if (sc && typeof sc === \"object\" && !Array.isArray(sc)) {\n    return sc as Record<string, unknown>;\n  }\n  return undefined;\n}\n","import { textResult, errorResult } from \"../mcp/server\";\nimport type { ToolHost } from \"../mcp/tool-host\";\nimport { readHistory, redoOne, undoOne } from \"./undo-stack\";\n\nexport type UndoToolsOptions = {\n  /** Default agent id when the caller doesn't pass one. */\n  defaultAgentId?: string;\n};\n\n/**\n * Idempotent tracker so multiple bridges on the same server only register\n * agent_undo / agent_redo / agent_history once.\n */\nconst installedHosts = new WeakSet<ToolHost>();\n\n/**\n * The one owner every copy of the undo tools registers under. They are SHARED\n * on purpose — every bridge ensures them, and a host may also call\n * `registerUndoTools` itself — so all of those are the same registrant, and a\n * second registration replaces the first instead of being refused as a\n * collision. Anything else claiming `agent_undo` is still refused.\n */\nconst UNDO_TOOLS_OWNER = \"agent-undo\";\n\n/**\n * ensureUndoToolsRegistered — bridges call this on construction. Safe to\n * call repeatedly with the same server; subsequent calls are no-ops.\n */\nexport function ensureUndoToolsRegistered(host: ToolHost, options: UndoToolsOptions = {}): void {\n  if (installedHosts.has(host)) return;\n  installedHosts.add(host);\n  registerUndoTools(host, options);\n}\n\n/**\n * registerUndoTools — add agent_undo / agent_redo / agent_history to the\n * server. Returns a disposer that unregisters all three.\n */\nexport function registerUndoTools(host: ToolHost, options: UndoToolsOptions = {}): () => void {\n  const defaultAgent = options.defaultAgentId ?? \"agent\";\n  const disposers: Array<() => void> = [];\n  const agentOf = (args: any): string =>\n    typeof args?.agentId === \"string\" ? args.agentId : defaultAgent;\n\n  disposers.push(\n    host.registerTool(\n      {\n        name: \"agent_undo\",\n        description: \"Undo the most recent action on the agent's stack. Optional agentId targets a specific agent.\",\n        inputSchema: {\n          type: \"object\",\n          properties: { agentId: { type: \"string\" } },\n          additionalProperties: false,\n        },\n      },\n      async (args) => {\n        const entry = await undoOne(agentOf(args));\n        if (!entry) return errorResult(\"Nothing to undo.\");\n        return textResult(`Undid: ${entry.label}`, { entry: serialize(entry) });\n      },\n      { owner: UNDO_TOOLS_OWNER },\n    ),\n  );\n\n  disposers.push(\n    host.registerTool(\n      {\n        name: \"agent_redo\",\n        description: \"Redo the most recently undone action.\",\n        inputSchema: {\n          type: \"object\",\n          properties: { agentId: { type: \"string\" } },\n          additionalProperties: false,\n        },\n      },\n      async (args) => {\n        const entry = await redoOne(agentOf(args));\n        if (!entry) return errorResult(\"Nothing to redo.\");\n        return textResult(`Redid: ${entry.label}`, { entry: serialize(entry) });\n      },\n      { owner: UNDO_TOOLS_OWNER },\n    ),\n  );\n\n  disposers.push(\n    host.registerTool(\n      {\n        name: \"agent_history\",\n        description: \"List the agent's undo stack (oldest first). Useful for understanding what's reversible.\",\n        inputSchema: {\n          type: \"object\",\n          properties: { agentId: { type: \"string\" } },\n          additionalProperties: false,\n        },\n      },\n      async (args) => {\n        const history = readHistory(agentOf(args)).map(serialize);\n        const text = history.map((e) => `${new Date(e.timestamp).toISOString()} ${e.bridgeId} ${e.action}: ${e.label}`).join(\"\\n\");\n        return textResult(text || \"(empty)\", history);\n      },\n      { owner: UNDO_TOOLS_OWNER },\n    ),\n  );\n\n  return () => disposers.forEach((d) => d());\n}\n\nfunction serialize(entry: import(\"./undo-stack\").UndoEntry) {\n  return {\n    timestamp: entry.timestamp,\n    bridgeId: entry.bridgeId,\n    action: entry.action,\n    label: entry.label,\n  };\n}\n","import type {\n  BoardItem,\n  ConnectorItem,\n  RemoteCursor,\n  ShapeItem,\n  ShapeKind,\n  StickyNoteItem,\n  Stroke,\n  Viewport,\n} from \"@particle-academy/fancy-whiteboard\";\nimport { textResult, errorResult } from \"../mcp/server\";\nimport type { ToolHost } from \"../mcp/tool-host\";\nimport type { JsonObject } from \"../mcp/types\";\nimport type { Bridge } from \"./types\";\nimport { wrapToolWithActivity } from \"../presence/wrap-tool-with-activity\";\nimport type { AgentTarget } from \"../presence/types\";\nimport { pushUndoEntry } from \"../undo/undo-stack\";\nimport { ensureUndoToolsRegistered } from \"../undo/undo-tools\";\n\n/**\n * State accessors / mutators the bridge needs from the host. The host owns\n * whiteboard state (controlled props on fancy-whiteboard components); the\n * bridge calls into these to read or change it.\n */\nexport type WhiteboardBridgeAdapter = {\n  getNotes: () => StickyNoteItem[];\n  setNotes: (next: StickyNoteItem[] | ((prev: StickyNoteItem[]) => StickyNoteItem[])) => void;\n  getShapes: () => ShapeItem[];\n  setShapes: (next: ShapeItem[] | ((prev: ShapeItem[]) => ShapeItem[])) => void;\n  getConnectors: () => ConnectorItem[];\n  setConnectors: (next: ConnectorItem[] | ((prev: ConnectorItem[]) => ConnectorItem[])) => void;\n  getStrokes: () => Stroke[];\n  setStrokes: (next: Stroke[] | ((prev: Stroke[]) => Stroke[])) => void;\n  getViewport: () => Viewport;\n  setViewport: (next: Viewport) => void;\n  /** Optional: agent presence cursor (for the visualizer). */\n  setAgentCursor?: (cursor: RemoteCursor | null) => void;\n};\n\nexport type WhiteboardBridgeOptions = {\n  adapter: WhiteboardBridgeAdapter;\n  /** Identity used when the agent stamps authorId on items / cursor. */\n  agent?: { id: string; name?: string; color?: string };\n};\n\nconst DEFAULT_AGENT = { id: \"agent\", name: \"Agent\", color: \"#a855f7\" };\nconst VALID_SHAPES: ShapeKind[] = [\"rect\", \"rounded-rect\", \"ellipse\", \"diamond\", \"triangle\", \"line\", \"arrow\", \"text\"];\n\nconst num = (v: unknown, fallback?: number): number =>\n  typeof v === \"number\" && Number.isFinite(v) ? v : fallback ?? 0;\nconst str = (v: unknown, fallback = \"\"): string => (typeof v === \"string\" ? v : fallback);\nconst bool = (v: unknown, fallback = false): boolean => (typeof v === \"boolean\" ? v : fallback);\n\nconst newId = (prefix: string) =>\n  `${prefix}_${Date.now().toString(36)}_${Math.random().toString(36).slice(2, 7)}`;\n\n/**\n * registerWhiteboardBridge — wires a full MCP tool set against a fancy-\n * whiteboard session controlled by the host. Returns a Bridge handle the\n * host can dispose to tear everything down.\n */\nexport function registerWhiteboardBridge(\n  host: ToolHost,\n  options: WhiteboardBridgeOptions,\n): Bridge {\n  const { adapter } = options;\n  const agent = { ...DEFAULT_AGENT, ...(options.agent ?? {}) };\n  const disposers: Array<() => void> = [];\n  // The bridge id is also its registrant identity on the host: the same bridge\n  // may re-register (a remount), a different one claiming a name is refused.\n  const bridgeId = \"whiteboard\";\n\n  // Register agent_undo / agent_redo / agent_history once per server. Idempotent.\n  ensureUndoToolsRegistered(host, { defaultAgentId: agent.id });\n\n  // Cursor narration is the agent's responsibility — call\n  // whiteboard_set_agent_cursor as a separate prerequisite before any\n  // mutation. This keeps the protocol honest: each tool does one thing.\n\n  // Activity-target resolver shared by every mutation tool. Pulls the id\n  // from the freshly-created item (structuredContent) when present, falls\n  // back to the args id (for update/delete tools).\n  const wbTarget = (args: any, result: any): AgentTarget => ({\n    kind: \"whiteboard\",\n    elementId: (result?.structuredContent?.id as string | undefined) ?? (args?.id as string | undefined),\n  });\n\n\n  const reg = (\n    name: string,\n    description: string,\n    inputProperties: Record<string, unknown>,\n    required: string[],\n    handler: (args: JsonObject) => Promise<any> | any,\n    /** Optional: resolve the activity target so the presence layer can render\n     *  a focus indicator on the touched element. Read tools omit this. */\n    resolveTarget?: (args: JsonObject, result: any) => AgentTarget | null,\n  ) => {\n    const wrapped = async (args: JsonObject) => {\n      try {\n        return await handler(args);\n      } catch (e) {\n        return errorResult(e instanceof Error ? e.message : String(e));\n      }\n    };\n    const final = resolveTarget\n      ? wrapToolWithActivity(wrapped, {\n          toolName: name,\n          agent: { id: agent.id, name: agent.name, color: agent.color },\n          kind: \"whiteboard\",\n          resolveTarget: ({ args, result }) => resolveTarget(args, result),\n        })\n      : wrapped;\n    disposers.push(\n      host.registerTool(\n        {\n          name,\n          description,\n          inputSchema: {\n            type: \"object\",\n            properties: inputProperties as any,\n            required,\n            additionalProperties: false,\n          },\n        },\n        final as any,\n        { owner: bridgeId },\n      ),\n    );\n  };\n\n  // ───────────── Read tools ─────────────\n\n  reg(\"whiteboard_get_state\", \"Get the full board state: viewport, all items, strokes.\", {}, [], () => {\n    const state = {\n      viewport: adapter.getViewport(),\n      notes: adapter.getNotes(),\n      shapes: adapter.getShapes(),\n      connectors: adapter.getConnectors(),\n      strokes: adapter.getStrokes(),\n    };\n    return textResult(JSON.stringify(state, null, 2), state);\n  });\n\n  reg(\"whiteboard_list_items\", \"List notes, shapes, and connectors with id, kind, and bounds.\", {}, [], () => {\n    const items: Array<{ id: string; kind: string; summary: string }> = [];\n    for (const n of adapter.getNotes()) {\n      items.push({\n        id: n.id,\n        kind: \"sticky\",\n        summary: `\"${(n.text ?? \"\").slice(0, 40)}\" @(${Math.round(n.x)},${Math.round(n.y)}) ${n.width}×${n.height}`,\n      });\n    }\n    for (const s of adapter.getShapes()) {\n      items.push({\n        id: s.id,\n        kind: `shape:${s.shape}`,\n        summary: `${s.text ? `\"${s.text}\" ` : \"\"}@(${Math.round(s.x)},${Math.round(s.y)}) ${s.width}×${s.height}`,\n      });\n    }\n    for (const c of adapter.getConnectors()) {\n      items.push({ id: c.id, kind: \"connector\", summary: `from=${JSON.stringify(c.from)} to=${JSON.stringify(c.to)}` });\n    }\n    return textResult(items.map((i) => `${i.kind} ${i.id}: ${i.summary}`).join(\"\\n\") || \"(empty board)\", items);\n  });\n\n  reg(\n    \"whiteboard_get_item\",\n    \"Get a single item (sticky / shape / connector) by id.\",\n    { id: { type: \"string\" } },\n    [\"id\"],\n    (args) => {\n      const id = str(args.id);\n      const all: BoardItem[] = [...adapter.getNotes(), ...adapter.getShapes(), ...adapter.getConnectors()];\n      const found = all.find((x) => x.id === id);\n      if (!found) return errorResult(`No item with id ${id}`);\n      return textResult(JSON.stringify(found, null, 2), found);\n    },\n  );\n\n  // ───────────── Sticky CRUD ─────────────\n\n  reg(\n    \"whiteboard_add_sticky\",\n    \"Add a sticky note. Position is in world coordinates.\",\n    {\n      x: { type: \"number\" },\n      y: { type: \"number\" },\n      text: { type: \"string\" },\n      width: { type: \"number\" },\n      height: { type: \"number\" },\n      color: { type: \"string\", description: \"CSS color, e.g. #fde68a\" },\n    },\n    [\"x\", \"y\"],\n    async (args) => {\n      const x = num(args.x);\n      const y = num(args.y);\n      const width = num(args.width, 180);\n      const height = num(args.height, 140);\n// (cursor narration is now an explicit separate tool call)\n      const note: StickyNoteItem = {\n        id: newId(\"n\"),\n        kind: \"sticky\",\n        x, y, width, height,\n        text: str(args.text),\n        color: typeof args.color === \"string\" ? args.color : \"#fde68a\",\n        authorId: agent.id,\n      };\n      adapter.setNotes((all) => [...all, note]);\n      pushUndoEntry(agent.id, {\n        timestamp: Date.now(),\n        bridgeId: \"whiteboard\",\n        action: \"whiteboard_add_sticky\",\n        label: `Added sticky ${note.id}`,\n        undo: () => adapter.setNotes((all) => all.filter((n) => n.id !== note.id)),\n        redo: () => adapter.setNotes((all) => [...all, note]),\n      });\n      return textResult(`Added sticky ${note.id}`, note);\n    },\n    wbTarget,\n  );\n\n  reg(\n    \"whiteboard_stream_text\",\n    \"Type text into a sticky note character-by-character so the human can read it forming. The tool returns once streaming finishes.\",\n    {\n      id: { type: \"string\" },\n      text: { type: \"string\" },\n      cps: { type: \"number\", description: \"Characters per second. Default 25.\" },\n      append: { type: \"boolean\", description: \"Append to existing text instead of replacing. Default false.\" },\n    },\n    [\"id\", \"text\"],\n    async (args) => {\n      const id = str(args.id);\n      const target = str(args.text);\n      const cps = Math.max(1, num(args.cps, 25));\n      const append = bool(args.append);\n      const startNote = adapter.getNotes().find((n) => n.id === id);\n      if (!startNote) return errorResult(`No sticky with id ${id}`);\n      const base = append ? (startNote.text ?? \"\") : \"\";\n      const interval = Math.max(8, Math.round(1000 / cps));\n      for (let i = 0; i <= target.length; i++) {\n        const nextText = base + target.slice(0, i);\n        adapter.setNotes((all) => all.map((n) => (n.id === id ? { ...n, text: nextText } : n)));\n        if (i < target.length) await new Promise((r) => setTimeout(r, interval));\n      }\n      return textResult(`Streamed ${target.length} chars to ${id}`, { id, text: base + target });\n    },\n  );\n\n  reg(\n    \"whiteboard_update_sticky\",\n    \"Update fields on a sticky note. Only provided fields are changed.\",\n    {\n      id: { type: \"string\" },\n      x: { type: \"number\" },\n      y: { type: \"number\" },\n      width: { type: \"number\" },\n      height: { type: \"number\" },\n      text: { type: \"string\" },\n      color: { type: \"string\" },\n    },\n    [\"id\"],\n    async (args) => {\n      const id = str(args.id);\n      const existing = adapter.getNotes().find((n) => n.id === id);\n      if (!existing) return errorResult(`No sticky with id ${id}`);\n      const nextX = args.x !== undefined ? num(args.x) : existing.x;\n      const nextY = args.y !== undefined ? num(args.y) : existing.y;\n      const nextW = args.width !== undefined ? num(args.width) : existing.width;\n      const nextH = args.height !== undefined ? num(args.height) : existing.height;\n// (cursor narration is now an explicit separate tool call)\n      let updated: StickyNoteItem | null = null;\n      adapter.setNotes((all) =>\n        all.map((n) => {\n          if (n.id !== id) return n;\n          updated = {\n            ...n,\n            x: nextX, y: nextY, width: nextW, height: nextH,\n            ...(args.text !== undefined ? { text: str(args.text) } : {}),\n            ...(args.color !== undefined ? { color: str(args.color) } : {}),\n          };\n          return updated;\n        }),\n      );\n      return textResult(`Updated sticky ${id}`, updated);\n    },\n    wbTarget,\n  );\n\n  // ───────────── Shape CRUD ─────────────\n\n  reg(\n    \"whiteboard_add_shape\",\n    `Add a shape. Kind must be one of: ${VALID_SHAPES.join(\", \")}.`,\n    {\n      shape: { type: \"string\", enum: VALID_SHAPES },\n      x: { type: \"number\" },\n      y: { type: \"number\" },\n      width: { type: \"number\" },\n      height: { type: \"number\" },\n      text: { type: \"string\" },\n      fill: { type: \"string\" },\n      stroke: { type: \"string\" },\n      flipX: { type: \"boolean\" },\n      flipY: { type: \"boolean\" },\n    },\n    [\"shape\", \"x\", \"y\", \"width\", \"height\"],\n    async (args) => {\n      const kind = str(args.shape) as ShapeKind;\n      if (!VALID_SHAPES.includes(kind)) return errorResult(`Invalid shape kind: ${kind}`);\n      const x = num(args.x);\n      const y = num(args.y);\n      const width = num(args.width);\n      const height = num(args.height);\n// (cursor narration is now an explicit separate tool call)\n      const shape: ShapeItem = {\n        id: newId(\"s\"),\n        kind: \"shape\",\n        shape: kind,\n        x, y, width, height,\n        ...(args.text !== undefined ? { text: str(args.text) } : {}),\n        ...(args.fill !== undefined ? { fill: str(args.fill) } : {}),\n        ...(args.stroke !== undefined ? { stroke: str(args.stroke) } : {}),\n        ...(args.flipX !== undefined ? { flipX: bool(args.flipX) } : {}),\n        ...(args.flipY !== undefined ? { flipY: bool(args.flipY) } : {}),\n      };\n      adapter.setShapes((all) => [...all, shape]);\n      return textResult(`Added ${kind} ${shape.id}`, shape);\n    },\n    wbTarget,\n  );\n\n  reg(\n    \"whiteboard_update_shape\",\n    \"Update fields on a shape.\",\n    {\n      id: { type: \"string\" },\n      x: { type: \"number\" },\n      y: { type: \"number\" },\n      width: { type: \"number\" },\n      height: { type: \"number\" },\n      text: { type: \"string\" },\n      fill: { type: \"string\" },\n      stroke: { type: \"string\" },\n    },\n    [\"id\"],\n    async (args) => {\n      const id = str(args.id);\n      const existing = adapter.getShapes().find((s) => s.id === id);\n      if (!existing) return errorResult(`No shape with id ${id}`);\n      const nextX = args.x !== undefined ? num(args.x) : existing.x;\n      const nextY = args.y !== undefined ? num(args.y) : existing.y;\n      const nextW = args.width !== undefined ? num(args.width) : existing.width;\n      const nextH = args.height !== undefined ? num(args.height) : existing.height;\n// (cursor narration is now an explicit separate tool call)\n      let updated: ShapeItem | null = null;\n      adapter.setShapes((all) =>\n        all.map((s) => {\n          if (s.id !== id) return s;\n          updated = {\n            ...s,\n            x: nextX, y: nextY, width: nextW, height: nextH,\n            ...(args.text !== undefined ? { text: str(args.text) } : {}),\n            ...(args.fill !== undefined ? { fill: str(args.fill) } : {}),\n            ...(args.stroke !== undefined ? { stroke: str(args.stroke) } : {}),\n          };\n          return updated;\n        }),\n      );\n      return textResult(`Updated shape ${id}`, updated);\n    },\n    wbTarget,\n  );\n\n  // ───────────── Connectors ─────────────\n\n  reg(\n    \"whiteboard_add_connector\",\n    \"Connect two items by id, or specify explicit world-space points.\",\n    {\n      from: { description: \"Item id (string) or {x,y}\" },\n      to: { description: \"Item id (string) or {x,y}\" },\n      color: { type: \"string\" },\n    },\n    [\"from\", \"to\"],\n    (args) => {\n      const c: ConnectorItem = {\n        id: newId(\"c\"),\n        kind: \"connector\",\n        from: args.from as any,\n        to: args.to as any,\n        ...(args.color !== undefined ? { color: str(args.color) } : {}),\n      };\n      adapter.setConnectors((all) => [...all, c]);\n      return textResult(`Added connector ${c.id}`, c);\n    },\n    wbTarget,\n  );\n\n  // ───────────── Drawing ─────────────\n\n  reg(\n    \"whiteboard_add_stroke\",\n    \"Add a freeform pen stroke. Points are absolute screen coords (matching the Drawing layer).\",\n    {\n      points: {\n        type: \"array\",\n        description: \"Array of {x,y} points\",\n      },\n      color: { type: \"string\" },\n      size: { type: \"number\" },\n    },\n    [\"points\"],\n    (args) => {\n      const points = (Array.isArray(args.points) ? args.points : []).map((p: any) => ({\n        x: num(p?.x),\n        y: num(p?.y),\n      }));\n      if (!points.length) return errorResult(\"Stroke requires at least one point\");\n      const stroke: Stroke = {\n        id: newId(\"st\"),\n        points,\n        color: typeof args.color === \"string\" ? args.color : \"#0f172a\",\n        size: typeof args.size === \"number\" ? args.size : 2,\n        authorId: agent.id,\n      };\n      adapter.setStrokes((all) => [...all, stroke]);\n      return textResult(`Added stroke ${stroke.id} (${points.length} points)`, stroke);\n    },\n    wbTarget,\n  );\n\n  // ───────────── Generic delete ─────────────\n\n  reg(\n    \"whiteboard_delete_item\",\n    \"Remove any item by id (sticky / shape / connector / stroke).\",\n    { id: { type: \"string\" } },\n    [\"id\"],\n    (args) => {\n      const id = str(args.id);\n      // Snapshot the items being removed so undo can re-insert them.\n      const removedNotes = adapter.getNotes().filter((x) => x.id === id);\n      const removedShapes = adapter.getShapes().filter((x) => x.id === id);\n      const removedConnectors = adapter.getConnectors().filter((x) => x.id === id);\n      const removedStrokes = adapter.getStrokes().filter((x) => x.id === id);\n      const removed = removedNotes.length + removedShapes.length + removedConnectors.length + removedStrokes.length > 0;\n      if (!removed) return errorResult(`No item with id ${id}`);\n      adapter.setNotes((all) => all.filter((x) => x.id !== id));\n      adapter.setShapes((all) => all.filter((x) => x.id !== id));\n      adapter.setConnectors((all) => all.filter((x) => x.id !== id));\n      adapter.setStrokes((all) => all.filter((x) => x.id !== id));\n      pushUndoEntry(agent.id, {\n        timestamp: Date.now(),\n        bridgeId: \"whiteboard\",\n        action: \"whiteboard_delete_item\",\n        label: `Deleted ${id}`,\n        undo: () => {\n          if (removedNotes.length) adapter.setNotes((all) => [...all, ...removedNotes]);\n          if (removedShapes.length) adapter.setShapes((all) => [...all, ...removedShapes]);\n          if (removedConnectors.length) adapter.setConnectors((all) => [...all, ...removedConnectors]);\n          if (removedStrokes.length) adapter.setStrokes((all) => [...all, ...removedStrokes]);\n        },\n        redo: () => {\n          adapter.setNotes((all) => all.filter((x) => x.id !== id));\n          adapter.setShapes((all) => all.filter((x) => x.id !== id));\n          adapter.setConnectors((all) => all.filter((x) => x.id !== id));\n          adapter.setStrokes((all) => all.filter((x) => x.id !== id));\n        },\n      });\n      return textResult(`Deleted ${id}`);\n    },\n    wbTarget,\n  );\n\n  // ───────────── Viewport / agent presence ─────────────\n\n  reg(\n    \"whiteboard_set_viewport\",\n    \"Pan / zoom the viewport.\",\n    { x: { type: \"number\" }, y: { type: \"number\" }, zoom: { type: \"number\" } },\n    [],\n    (args) => {\n      const v = adapter.getViewport();\n      const next: Viewport = {\n        x: args.x !== undefined ? num(args.x) : v.x,\n        y: args.y !== undefined ? num(args.y) : v.y,\n        zoom: args.zoom !== undefined ? num(args.zoom) : v.zoom,\n      };\n      adapter.setViewport(next);\n      return textResult(`Viewport → ${JSON.stringify(next)}`, next);\n    },\n    wbTarget,\n  );\n\n  reg(\n    \"whiteboard_set_agent_cursor\",\n    \"Move the agent's presence cursor (or pass null to hide it).\",\n    {\n      x: { type: \"number\" },\n      y: { type: \"number\" },\n      hide: { type: \"boolean\" },\n    },\n    [],\n    (args) => {\n      if (!adapter.setAgentCursor) return errorResult(\"Host did not provide setAgentCursor\");\n      if (bool(args.hide)) {\n        adapter.setAgentCursor(null);\n        return textResult(\"Agent cursor hidden\");\n      }\n      const cursor: RemoteCursor = {\n        userId: agent.id,\n        name: agent.name,\n        color: agent.color,\n        x: num(args.x),\n        y: num(args.y),\n      };\n      adapter.setAgentCursor(cursor);\n      return textResult(`Cursor → (${cursor.x}, ${cursor.y})`, cursor);\n    },\n    wbTarget,\n  );\n\n  return {\n    id: bridgeId,\n    title: \"Whiteboard\",\n    dispose: () => {\n      for (const d of disposers) d();\n      adapter.setAgentCursor?.(null);\n    },\n  };\n}\n"]}