fix: remove avoidable model runtime limits

Preserve long histories and parsed attachments, expose paged process and Subagent output, isolate MCP discovery failures, and expand browser snapshots and knowledge result selection. Remove fixed Harness output and updated remote Runtime duration limits.

Keep released Agent profile and v1 bridge compatibility while enabling larger framed exchanges and optional limits for updated peers. Document remote coverage requirements and real-model boundary validation.

Release note: Long model tasks can retain more context and continue reading complete tool output; remote execution preserves compatibility with released Agents. Updated remote limits require an updated Agent and Runtime bundle.

src/agent-daemon/model-bridge-broker.ts

@@ -39,7 +39,7 @@ export const MODEL_BRIDGE_BROKER_SOCKET_NAME =
 
 const BROKER_PROTOCOL_VERSION = 1
 const DEFAULT_MAXIMUM_CONNECTIONS = 8
-const DEFAULT_REQUEST_TIMEOUT_MS = 150_000
+const DEFAULT_REQUEST_TIMEOUT_MS = 0
 const DEFAULT_CONNECT_TIMEOUT_MS = 5_000
 const CLOSE_TIMEOUT_MS = 2_000
 const MAXIMUM_UNIX_SOCKET_PATH_BYTES = 107
@@ -192,8 +192,8 @@ export class ModelBridgeBrokerServer {
     )
     this.#requestTimeoutMs = boundedInteger(
       options.requestTimeoutMs ?? DEFAULT_REQUEST_TIMEOUT_MS,
-      1,
-      300_000,
+      0,
+      0x7fff_ffff,
       'Model bridge request timeout'
     )
   }
@@ -298,12 +298,12 @@ export class ModelBridgeBrokerServer {
       )
     }
     socket.once('close', onClose)
-    const timeout = setTimeout(() => {
+    const timeout = this.#requestTimeoutMs === 0 ? undefined : setTimeout(() => {
       cancellation.abort(
         new ModelBridgeBrokerError('request-timeout')
       )
     }, this.#requestTimeoutMs)
-    timeout.unref?.()
+    timeout?.unref?.()
 
     let requestId = `invalid-${randomUUID()}`
     let dispatched: ModelBridgeExchangeResult | undefined
@@ -383,8 +383,8 @@ export function createUnixModelBridgeExchange(options: {
   )
   const requestTimeoutMs = boundedInteger(
     options.requestTimeoutMs ?? DEFAULT_REQUEST_TIMEOUT_MS,
-    1,
-    300_000,
+    0,
+    0x7fff_ffff,
     'Model bridge request timeout'
   )
 
@@ -394,13 +394,13 @@ export function createUnixModelBridgeExchange(options: {
     context.signal.throwIfAborted()
     const socket = createConnection(socketPath)
     const timeoutController = new AbortController()
-    const timeout = setTimeout(() => {
+    const timeout = requestTimeoutMs === 0 ? undefined : setTimeout(() => {
       timeoutController.abort(
         new ModelBridgeBrokerError('request-timeout')
       )
       socket.destroy()
     }, requestTimeoutMs)
-    timeout.unref?.()
+    timeout?.unref?.()
     const onAbort = (): void => {
       socket.destroy()
     }