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/main/remote-agent/managed-model-bridge.ts

@@ -2,14 +2,29 @@ import { createHash } from 'node:crypto'
 import { canonicalJson } from '../../shared/agent-protocol/canonical'
 import {
   agentPromptModelProfileSchema,
+  MODEL_BRIDGE_OPTIONAL_LIMITS_CAPABILITY,
   modelBridgePolicySchema,
   type AgentPromptModelProfile,
   type ModelBridgePolicy
 } from '../../shared/model-bridge-contracts'
 import type { ResolvedModelProfile } from '../runtime-settings-store'
 
-const DEFAULT_MAXIMUM_OUTPUT_TOKENS = 32_000
-const MODEL_REQUEST_TIMEOUT_MILLISECONDS = 60_000
+export function modelProfileForAgent(
+  profile: AgentPromptModelProfile,
+  capabilities: ReadonlyArray<{ name: string; version: number }>
+): AgentPromptModelProfile {
+  if (capabilities.some(capability =>
+    capability.name === MODEL_BRIDGE_OPTIONAL_LIMITS_CAPABILITY && capability.version === 1
+  )) return structuredClone(profile)
+  // Released Agent 0.11.22 requires both fields and enforces these bounds.
+  return {
+    ...structuredClone(profile),
+    limits: {
+      maximumOutputTokens: Math.min(profile.limits.maximumOutputTokens ?? 32_000, 1_000_000),
+      requestTimeoutMilliseconds: Math.min(profile.limits.requestTimeoutMilliseconds ?? 60_000, 300_000)
+    }
+  }
+}
 
 /**
  * Prompt-scoped model material passed directly to the Agent. The policy is
@@ -58,14 +73,6 @@ export function createManagedModelBridge(options: {
       'Managed remote OpenCode requires a usable text model profile'
     )
   }
-  const maximumOutputTokens = Math.min(
-    1_000_000,
-    Math.max(
-      1,
-      selected.maximumOutputTokens ??
-        DEFAULT_MAXIMUM_OUTPUT_TOKENS
-    )
-  )
   const modelProfileDigest =
     createResolvedModelProfileDigest(selected)
   const profile = agentPromptModelProfileSchema.parse({
@@ -94,9 +101,9 @@ export function createManagedModelBridge(options: {
       imageInput: selected.supportsImageInput === true
     },
     limits: {
-      maximumOutputTokens,
-      requestTimeoutMilliseconds:
-        MODEL_REQUEST_TIMEOUT_MILLISECONDS
+      ...(selected.maximumOutputTokens === undefined
+        ? {}
+        : { maximumOutputTokens: selected.maximumOutputTokens })
     }
   })
   const policy = modelBridgePolicySchema.parse({