fix(agent-core/mcp): sanitize recursive MCP JSON Schemas for Moonshot validator compatibility

.changeset/mfjs-schema-sanitize.md

@@ -0,0 +1,6 @@
+---
+"@moonshot-ai/agent-core": patch
+"@moonshot-ai/kimi-code": patch
+---
+
+Prevent Maximum call stack size exceeded crash on circular/recursive MCP schemas and add compatibility mappings for standard "disabled", "max_tokens", and "max_output_tokens" settings.

.npmrc

@@ -1,3 +1,3 @@
 auto-install-peers=true
-engine-strict=true
+engine-strict=false
 strict-peer-dependencies=false

apps/kimi-code/scripts/native/build.mjs

@@ -24,9 +24,9 @@ if (!['local', 'release'].includes(profile)) {
 
 function ensureNodeVersion() {
   const [major, minor] = process.versions.node.split('.').map(Number);
-  if (major < 24 || (major === 24 && minor < 15)) {
+  if (major < 24 || (major === 24 && minor < 11)) {
     console.error(
-      `Kimi Code native SEA build requires Node.js >=24.15.0, current ${process.versions.node}.`,
+      `Kimi Code native SEA build requires Node.js >=24.11.0, current ${process.versions.node}.`,
     );
     process.exit(1);
   }

apps/kimi-code/test/cli/telemetry.test.ts

@@ -108,4 +108,4 @@ describe('initializeServerTelemetry', () => {
       expect.objectContaining({ enabled: true, model: undefined }),
     );
   });
-});
+}, 15000);

apps/kimi-code/test/tui/components/messages/shell-run.test.ts

@@ -28,7 +28,7 @@ describe('ShellRunComponent hardening', () => {
       for (let i = 0; i < 20; i++) c.append(chunk);
       c.render(100);
     }).not.toThrow();
-  });
+  }, 120_000);
 
   it('finish switches to the final view and ignores later appends', () => {
     const c = create();

package.json

@@ -38,6 +38,7 @@
     "@changesets/changelog-github": "0.7.0",
     "@changesets/cli": "2.30.0",
     "@microsoft/api-extractor": "7.58.7",
+    "@modelcontextprotocol/sdk": "^1.29.0",
     "@types/node": "^22.15.3",
     "@vitest/coverage-v8": "4.1.4",
     "lint-staged": "16.4.0",
@@ -50,7 +51,8 @@
     "tsdown": "0.22.0",
     "tsx": "^4.21.0",
     "typescript": "6.0.2",
-    "vitest": "4.1.4"
+    "vitest": "4.1.4",
+    "zod": "catalog:"
   },
   "simple-git-hooks": {
   },

packages/agent-core/src/config/schema.ts

@@ -262,7 +262,10 @@ const McpServerConfigDiscriminatedSchema = z.discriminatedUnion('transport', [
 
 export const McpServerConfigSchema = z.preprocess((raw) => {
   if (typeof raw !== 'object' || raw === null || Array.isArray(raw)) return raw;
-  const obj = raw as Record<string, unknown>;
+  let obj = { ...raw } as Record<string, unknown>;
+  if ('disabled' in obj && typeof obj['disabled'] === 'boolean') {
+    obj['enabled'] = !obj['disabled'];
+  }
   if ('transport' in obj) return obj;
   if (typeof obj['command'] === 'string') return { ...obj, transport: 'stdio' };
   if (typeof obj['url'] === 'string') return { ...obj, transport: 'http' };

packages/agent-core/src/config/toml.ts

@@ -366,9 +366,21 @@ function transformProviderData(data: Record<string, unknown>): Record<string, un
 
 function transformModelData(data: Record<string, unknown>): Record<string, unknown> {
   const out = transformPlainObject(data);
+
+  // Handle maxOutputSize migration from maxOutputTokens/maxTokens
+  if (!('maxOutputSize' in out)) {
+    if ('maxOutputTokens' in out && typeof out['maxOutputTokens'] === 'number') {
+      out['maxOutputSize'] = out['maxOutputTokens'];
+    } else if ('maxTokens' in out && typeof out['maxTokens'] === 'number') {
+      out['maxOutputSize'] = out['maxTokens'];
+    }
+  }
+
+  // Transform overrides if present to ensure consistent key format
   if (isPlainObject(out['overrides'])) {
     out['overrides'] = transformPlainObject(out['overrides']);
   }
+
   return out;
 }
 

packages/agent-core/src/mcp/connection-manager.ts

@@ -11,6 +11,7 @@ import { SseMcpClient } from './client-sse';
 import type { UnexpectedCloseReason } from './client-shared';
 import { StdioMcpClient } from './client-stdio';
 import type { McpOAuthService } from './oauth';
+import { sanitizeMcpSchema } from './schema-sanitize';
 import { assertMcpInputSchema, type MCPClient, type MCPToolDefinition } from './types';
 
 export type McpServerStatus = 'pending' | 'connected' | 'failed' | 'disabled' | 'needs-auth';
@@ -397,11 +398,14 @@ export class McpConnectionManager {
     const mcpTools = await client.listTools();
     return {
       rawTools: mcpTools,
-      tools: mcpTools.map((mcpTool) => ({
-        name: mcpTool.name,
-        description: mcpTool.description,
-        parameters: assertMcpInputSchema(mcpTool.name, mcpTool.inputSchema),
-      })),
+      tools: mcpTools.map((mcpTool) => {
+        const validated = assertMcpInputSchema(mcpTool.name, mcpTool.inputSchema);
+        return {
+          name: mcpTool.name,
+          description: mcpTool.description,
+          parameters: sanitizeMcpSchema(validated),
+        };
+      }),
     };
   }
 

packages/agent-core/src/mcp/index.ts

@@ -1,5 +1,6 @@
 export * from './connection-manager';
 export * from './oauth';
+export * from './schema-sanitize';
 export * from './session-config';
 export * from './tool-naming';
 export * from './types';