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/agent/goodbuddy-harness-control-plane.ts

@@ -66,8 +66,6 @@ export {
 } from './deepseek-harness-protocol'
 
 const DEFAULT_MAX_EVENT_CHARACTERS = 64 * 1024
-const DEFAULT_MAX_REQUEST_CHARACTERS = 4 * 1024 * 1024
-export const GOODBUDDY_HARNESS_MAX_STEP_TOKENS = 16 * 1024
 const DELTA_BATCH_CHARACTERS = 4 * 1024
 const DELTA_BATCH_INTERVAL_MS = 100
 const MAX_SUMMARY_CHARACTERS = 4_000
@@ -121,7 +119,6 @@ export type GoodBuddyHarnessControlConfig = {
   trustedAskToolDefinitions?: ReadonlyMap<string, ToolDefinition>
   stream?: Stream
   maxEventCharacters?: number
-  maxRequestCharacters?: number
 }
 
 type Preparation = {
@@ -150,7 +147,6 @@ type OwnedSession = {
     turnError?: unknown
     resolve: (reason: string) => void
     reject: (error: unknown) => void
-    emittedCharacters: number
     eventTail: Promise<void>
     eventError?: unknown
     pendingDelta?: {
@@ -466,7 +462,6 @@ export class GoodBuddyHarnessControlPlane {
   private readonly sessions = new Map<string, OwnedSession>()
   private readonly allowedCredentialRefs: ReadonlySet<string>
   private readonly maxEventCharacters: number
-  private readonly maxRequestCharacters: number
   private connection?: AcpAgentConnection
   private credentialProvider?: GoodBuddyCredentialProvider
   private handshaken = false
@@ -481,9 +476,6 @@ export class GoodBuddyHarnessControlPlane {
     this.allowedCredentialRefs = new Set(config.credentialRefs)
     this.maxEventCharacters =
       config.maxEventCharacters ?? DEFAULT_MAX_EVENT_CHARACTERS
-    this.maxRequestCharacters =
-      config.maxRequestCharacters ??
-      DEFAULT_MAX_REQUEST_CHARACTERS
   }
 
   bindCredentialProvider(
@@ -578,15 +570,6 @@ export class GoodBuddyHarnessControlPlane {
         'GoodBuddy Harness control event exceeds safety limit'
       )
     }
-    inflight.emittedCharacters += text.length
-    if (
-      inflight.emittedCharacters > this.maxRequestCharacters
-    ) {
-      record.handle.agent.cancel({ kind: 'user' })
-      throw new Error(
-        'GoodBuddy Harness control request output exceeds safety limit'
-      )
-    }
     await this.connection.extNotification(GOODBUDDY_EVENT, params)
   }
 
@@ -1164,8 +1147,7 @@ export class GoodBuddyHarnessControlPlane {
           meta: { cwd: params.cwd },
           agentOptions: {
             provider: this.config.provider,
-            model: this.config.model,
-            maxTokens: GOODBUDDY_HARNESS_MAX_STEP_TOKENS
+            model: this.config.model
           },
           setup: async (agentCtx) => {
             agentCtx.systemPrompt.section({
@@ -1281,7 +1263,6 @@ export class GoodBuddyHarnessControlPlane {
               mode: preparation.mode,
               resolve,
               reject,
-              emittedCharacters: 0,
               eventTail: Promise.resolve()
             }
             try {