use anthropic model

.env.example

@@ -1 +1,2 @@
 OPENROUTER_API_KEY=
+ANTHROPIC_API_KEY=

package-lock.json

@@ -9,6 +9,7 @@
       "version": "0.0.1",
       "license": "ISC",
       "dependencies": {
+        "@langchain/anthropic": "^1.3.29",
         "@langchain/core": "^1.1.45",
         "@langchain/langgraph": "^1.3.0",
         "@langchain/openrouter": "^0.2.4",
@@ -23,6 +24,35 @@
         "vitest": "^4.1.5"
       }
     },
+    "node_modules/@anthropic-ai/sdk": {
+      "version": "0.91.1",
+      "resolved": "https://registry.npmjs.org/@anthropic-ai/sdk/-/sdk-0.91.1.tgz",
+      "integrity": "sha512-LAmu761tSN9r66ixvmciswUj/ZC+1Q4iAfpedTfSVLeswRwnY3n2Nb6Tsk+cLPP28aLOPWeMgIuTuCcMC6W/iw==",
+      "license": "MIT",
+      "dependencies": {
+        "json-schema-to-ts": "^3.1.1"
+      },
+      "bin": {
+        "anthropic-ai-sdk": "bin/cli"
+      },
+      "peerDependencies": {
+        "zod": "^3.25.0 || ^4.0.0"
+      },
+      "peerDependenciesMeta": {
+        "zod": {
+          "optional": true
+        }
+      }
+    },
+    "node_modules/@babel/runtime": {
+      "version": "7.29.2",
+      "resolved": "https://registry.npmjs.org/@babel/runtime/-/runtime-7.29.2.tgz",
+      "integrity": "sha512-JiDShH45zKHWyGe4ZNVRrCjBz8Nh9TMmZG1kh4QTK8hCBTWBi8Da+i7s1fJw7/lYpM4ccepSNfqzZ/QvABBi5g==",
+      "license": "MIT",
+      "engines": {
+        "node": ">=6.9.0"
+      }
+    },
     "node_modules/@biomejs/biome": {
       "version": "2.4.14",
       "resolved": "https://registry.npmjs.org/@biomejs/biome/-/biome-2.4.14.tgz",
@@ -233,6 +263,22 @@
       "dev": true,
       "license": "MIT"
     },
+    "node_modules/@langchain/anthropic": {
+      "version": "1.3.29",
+      "resolved": "https://registry.npmjs.org/@langchain/anthropic/-/anthropic-1.3.29.tgz",
+      "integrity": "sha512-ep1qBIcV07bajsg3fDqMd39rYwoRLOEK/6lk+MCxlm1YB5SRoKKJAZANrblQ/4RYhZJnxf95c6BSQu8VoNbVAQ==",
+      "license": "MIT",
+      "dependencies": {
+        "@anthropic-ai/sdk": "^0.91.1",
+        "zod": "^3.25.76 || ^4"
+      },
+      "engines": {
+        "node": ">=20"
+      },
+      "peerDependencies": {
+        "@langchain/core": "^1.1.45"
+      }
+    },
     "node_modules/@langchain/core": {
       "version": "1.1.45",
       "resolved": "https://registry.npmjs.org/@langchain/core/-/core-1.1.45.tgz",
@@ -1078,6 +1124,19 @@
         "base64-js": "^1.5.1"
       }
     },
+    "node_modules/json-schema-to-ts": {
+      "version": "3.1.1",
+      "resolved": "https://registry.npmjs.org/json-schema-to-ts/-/json-schema-to-ts-3.1.1.tgz",
+      "integrity": "sha512-+DWg8jCJG2TEnpy7kOm/7/AxaYoaRbjVB4LFZLySZlWn8exGs3A4OLJR966cVvU26N7X9TWxl+Jsw7dzAqKT6g==",
+      "license": "MIT",
+      "dependencies": {
+        "@babel/runtime": "^7.18.3",
+        "ts-algebra": "^2.0.0"
+      },
+      "engines": {
+        "node": ">=16"
+      }
+    },
     "node_modules/langchain": {
       "version": "1.4.0",
       "resolved": "https://registry.npmjs.org/langchain/-/langchain-1.4.0.tgz",
@@ -1677,6 +1736,12 @@
         "node": ">=14.0.0"
       }
     },
+    "node_modules/ts-algebra": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/ts-algebra/-/ts-algebra-2.0.0.tgz",
+      "integrity": "sha512-FPAhNPFMrkwz76P7cdjdmiShwMynZYN6SgOujD1urY4oNm80Ou9oMdmbR45LotcKOXoy7wSmHkRFE6Mxbrhefw==",
+      "license": "MIT"
+    },
     "node_modules/tslib": {
       "version": "2.8.1",
       "resolved": "https://registry.npmjs.org/tslib/-/tslib-2.8.1.tgz",

package.json

@@ -27,6 +27,7 @@
     "vitest": "^4.1.5"
   },
   "dependencies": {
+    "@langchain/anthropic": "^1.3.29",
     "@langchain/core": "^1.1.45",
     "@langchain/langgraph": "^1.3.0",
     "@langchain/openrouter": "^0.2.4",

src/agents/auditor/model.ts

@@ -1,5 +1,5 @@
-import { ChatOpenRouter } from "@langchain/openrouter";
+import { ChatAnthropic } from "@langchain/anthropic";
 
-export const auditorModel = new ChatOpenRouter({
-  model: "moonshotai/kimi-k2.6",
+export const auditorModel = new ChatAnthropic({
+  model: "claude-sonnet-4-6",
 });