diff --git a/AgentCompany-New/src/main/database/migrations/036-additional-connectors.ts b/AgentCompany-New/src/main/database/migrations/036-additional-connectors.ts
new file mode 100644
index 00000000..8d51a400
--- /dev/null
+++ b/AgentCompany-New/src/main/database/migrations/036-additional-connectors.ts
@@ -0,0 +1,20 @@
+export const additionalConnectorsSchema = `
+  insert or ignore into providers(id, org_id, provider_key, label, auth_type, model, credential_id, enabled, created_at)
+  select 'prv_' || lower(hex(randomblob(16))), organizations.id, 'claude-pro', 'Claude Pro/Max', 'oauth_pkce', 'claude-sonnet-4-5', null, 0, datetime('now')
+  from organizations;
+
+  insert or ignore into providers(id, org_id, provider_key, label, auth_type, model, credential_id, enabled, created_at)
+  select 'prv_' || lower(hex(randomblob(16))), organizations.id, 'mistral', 'Mistral', 'api_key', 'mistral-large-latest', null, 0, datetime('now')
+  from organizations;
+
+  insert or ignore into providers(id, org_id, provider_key, label, auth_type, model, credential_id, enabled, created_at)
+  select 'prv_' || lower(hex(randomblob(16))), organizations.id, 'cerebras', 'Cerebras', 'api_key', 'qwen-3-235b-a22b-instruct-2507', null, 0, datetime('now')
+  from organizations;
+
+  insert or ignore into providers(id, org_id, provider_key, label, auth_type, model, credential_id, enabled, created_at)
+  select 'prv_' || lower(hex(randomblob(16))), organizations.id, 'openrouter', 'OpenRouter', 'api_key', 'anthropic/claude-sonnet-4.5', null, 0, datetime('now')
+  from organizations;
+
+  insert into schema_migrations(version, name, applied_at)
+  values (36, 'additional_connectors', datetime('now'));
+`;
diff --git a/AgentCompany-New/src/main/database/schema.ts b/AgentCompany-New/src/main/database/schema.ts
index 00cc74b7..6b594a33 100644
--- a/AgentCompany-New/src/main/database/schema.ts
+++ b/AgentCompany-New/src/main/database/schema.ts
@@ -34,6 +34,7 @@ import { browserActionMetadataSchema } from "./migrations/032-browser-action-met
 import { auditEventImmutabilitySchema } from "./migrations/033-audit-event-immutability";
 import { providerAuthSessionsSchema } from "./migrations/034-provider-auth-sessions";
 import { taskRunIsolationSchema } from "./migrations/035-task-run-isolation";
+import { additionalConnectorsSchema } from "./migrations/036-additional-connectors";
 
 interface Migration {
   version: number;
@@ -77,6 +78,7 @@ const MIGRATIONS: Migration[] = [
   { version: 33, name: "audit_event_immutability", sql: auditEventImmutabilitySchema },
   { version: 34, name: "provider_auth_sessions", sql: providerAuthSessionsSchema },
   { version: 35, name: "task_run_isolation", sql: taskRunIsolationSchema },
+  { version: 36, name: "additional_connectors", sql: additionalConnectorsSchema },
 ];
 
 const SCHEMA_VERSION = MIGRATIONS[MIGRATIONS.length - 1].version;
diff --git a/AgentCompany-New/src/main/services/oauth/anthropic-claude-flow.ts b/AgentCompany-New/src/main/services/oauth/anthropic-claude-flow.ts
new file mode 100644
index 00000000..442c45c0
--- /dev/null
+++ b/AgentCompany-New/src/main/services/oauth/anthropic-claude-flow.ts
@@ -0,0 +1,70 @@
+/**
+ * Anthropic Claude Pro/Max — authorization-code + PKCE flow.
+ *
+ * Ported from the reference implementation in @mariozechner/pi-ai. Uses a
+ * loopback callback server on the registered redirect URI and a JSON token
+ * exchange.
+ */
+import { startOAuthCallbackServer } from "./oauth-callback-server";
+import { generatePkce } from "./pkce";
+import type { OAuthCredentials, OAuthFlow, OAuthLoginCallbacks } from "./oauth-types";
+
+const CLIENT_ID = "9d1c250a-e61b-44d9-88ed-5944d1962f5e";
+const AUTHORIZE_URL = "https://claude.ai/oauth/authorize";
+const TOKEN_URL = "https://platform.claude.com/v1/oauth/token";
+const CALLBACK_PORT = 53692;
+const CALLBACK_PATH = "/callback";
+const REDIRECT_URI = `http://localhost:${CALLBACK_PORT}${CALLBACK_PATH}`;
+const SCOPES = "org:create_api_key user:profile user:inference user:sessions:claude_code user:mcp_servers user:file_upload";
+
+function buildAuthorizeUrl(challenge: string, state: string): string {
+  const params = new URLSearchParams({
+    code: "true",
+    client_id: CLIENT_ID,
+    response_type: "code",
+    redirect_uri: REDIRECT_URI,
+    scope: SCOPES,
+    code_challenge: challenge,
+    code_challenge_method: "S256",
+    state,
+  });
+  return `${AUTHORIZE_URL}?${params.toString()}`;
+}
+
+async function exchangeCode(code: string, state: string, verifier: string): Promise<OAuthCredentials> {
+  const response = await fetch(TOKEN_URL, {
+    method: "POST",
+    headers: { "Content-Type": "application/json", Accept: "application/json" },
+    body: JSON.stringify({
+      grant_type: "authorization_code",
+      client_id: CLIENT_ID,
+      code,
+      state,
+      redirect_uri: REDIRECT_URI,
+      code_verifier: verifier,
+    }),
+  });
+  const text = await response.text();
+  if (!response.ok) throw new Error(`Token exchange failed: ${response.status} ${text}`);
+  const json = JSON.parse(text) as { access_token?: unknown; refresh_token?: unknown; expires_in?: unknown };
+  if (typeof json.access_token !== "string" || typeof json.refresh_token !== "string" || typeof json.expires_in !== "number") {
+    throw new Error("Token response was missing required fields.");
+  }
+  return { access: json.access_token, refresh: json.refresh_token, expires: Date.now() + json.expires_in * 1000 - 5 * 60 * 1000 };
+}
+
+export const anthropicClaudeFlow: OAuthFlow = {
+  providerKey: "claude-pro",
+  async login(callbacks: OAuthLoginCallbacks): Promise<OAuthCredentials> {
+    const { verifier, challenge } = generatePkce();
+    const server = await startOAuthCallbackServer({ port: CALLBACK_PORT, path: CALLBACK_PATH, signal: callbacks.signal });
+    try {
+      callbacks.onAuth({ url: buildAuthorizeUrl(challenge, verifier), instructions: "Complete the Claude sign-in in your browser." });
+      const result = await server.waitForCode();
+      if (result.state !== verifier) throw new Error("OAuth state mismatch.");
+      return await exchangeCode(result.code, result.state, verifier);
+    } finally {
+      server.close();
+    }
+  },
+};
diff --git a/AgentCompany-New/src/main/services/oauth/oauth-flows.ts b/AgentCompany-New/src/main/services/oauth/oauth-flows.ts
index da4c7f5c..8c265621 100644
--- a/AgentCompany-New/src/main/services/oauth/oauth-flows.ts
+++ b/AgentCompany-New/src/main/services/oauth/oauth-flows.ts
@@ -1,6 +1,7 @@
 import { githubCopilotFlow } from "./github-copilot-flow";
 import { openaiCodexFlow } from "./openai-codex-flow";
 import { antigravityFlow } from "./google-antigravity-flow";
+import { anthropicClaudeFlow } from "./anthropic-claude-flow";
 import type { OAuthFlow } from "./oauth-types";
 
 /** Provider keys (from the catalog) mapped to their native OAuth login flow. */
@@ -8,6 +9,7 @@ const OAUTH_FLOWS: Record<string, OAuthFlow> = {
   "github-copilot": githubCopilotFlow,
   "gpt-account": openaiCodexFlow,
   "google-antigravity": antigravityFlow,
+  "claude-pro": anthropicClaudeFlow,
 };
 
 export function hasOAuthFlow(providerKey: string): boolean {
diff --git a/AgentCompany-New/src/main/services/provider-adapters.ts b/AgentCompany-New/src/main/services/provider-adapters.ts
index f4ecd435..cf332843 100644
--- a/AgentCompany-New/src/main/services/provider-adapters.ts
+++ b/AgentCompany-New/src/main/services/provider-adapters.ts
@@ -253,9 +253,28 @@ export const providerAdapters: ProviderAdapterRegistry = {
     endpoint: "https://api.groq.com/openai/v1/chat/completions",
     healthUrl: "https://api.groq.com/openai/v1/models",
   }),
+  mistral: openAiCompatibleAdapter({
+    providerKey: "mistral",
+    label: "Mistral",
+    endpoint: "https://api.mistral.ai/v1/chat/completions",
+    healthUrl: "https://api.mistral.ai/v1/models",
+  }),
+  cerebras: openAiCompatibleAdapter({
+    providerKey: "cerebras",
+    label: "Cerebras",
+    endpoint: "https://api.cerebras.ai/v1/chat/completions",
+    healthUrl: "https://api.cerebras.ai/v1/models",
+  }),
+  openrouter: openAiCompatibleAdapter({
+    providerKey: "openrouter",
+    label: "OpenRouter",
+    endpoint: "https://openrouter.ai/api/v1/chat/completions",
+    healthUrl: "https://openrouter.ai/api/v1/models",
+  }),
   "github-copilot": browserTokenAdapter("github-copilot", PROVIDER_AUTH_TYPE.OAUTH_PKCE),
   "google-antigravity": browserTokenAdapter("google-antigravity", PROVIDER_AUTH_TYPE.OAUTH_PKCE),
   "gpt-account": browserTokenAdapter("gpt-account", PROVIDER_AUTH_TYPE.ACCOUNT_SUBSCRIPTION),
+  "claude-pro": browserTokenAdapter("claude-pro", PROVIDER_AUTH_TYPE.OAUTH_PKCE),
   "azure-openai": {
     providerKey: "azure-openai",
     authType: PROVIDER_AUTH_TYPE.CLOUD,
diff --git a/AgentCompany-New/src/shared/provider-catalog.ts b/AgentCompany-New/src/shared/provider-catalog.ts
index e6c0dcf8..1671fa33 100644
--- a/AgentCompany-New/src/shared/provider-catalog.ts
+++ b/AgentCompany-New/src/shared/provider-catalog.ts
@@ -20,6 +20,15 @@ const RAW_CATALOG: Omit<ProviderCatalogEntry, "models">[] = [
     signInUrl: null,
     credentialHelp: "Generate an API key at console.anthropic.com → API keys.",
   },
+  {
+    key: "claude-pro",
+    label: "Claude Pro/Max",
+    authType: PROVIDER_AUTH_TYPE.OAUTH_PKCE,
+    defaultModel: "claude-sonnet-4-5",
+    capabilityTags: ["account", "subscription"],
+    signInUrl: "https://claude.ai/login",
+    credentialHelp: "Sign in with your Claude Pro or Max account in the browser; AgentCompany finishes the handshake.",
+  },
   {
     key: "xai",
     label: "xAI Grok",
@@ -38,6 +47,33 @@ const RAW_CATALOG: Omit<ProviderCatalogEntry, "models">[] = [
     signInUrl: null,
     credentialHelp: "Generate an API key at console.groq.com → API keys.",
   },
+  {
+    key: "mistral",
+    label: "Mistral",
+    authType: PROVIDER_AUTH_TYPE.API_KEY,
+    defaultModel: "mistral-large-latest",
+    capabilityTags: ["chat", "reasoning"],
+    signInUrl: null,
+    credentialHelp: "Generate an API key at console.mistral.ai → API keys.",
+  },
+  {
+    key: "cerebras",
+    label: "Cerebras",
+    authType: PROVIDER_AUTH_TYPE.API_KEY,
+    defaultModel: "qwen-3-235b-a22b-instruct-2507",
+    capabilityTags: ["inference", "fast"],
+    signInUrl: null,
+    credentialHelp: "Generate an API key at cloud.cerebras.ai → API keys.",
+  },
+  {
+    key: "openrouter",
+    label: "OpenRouter",
+    authType: PROVIDER_AUTH_TYPE.API_KEY,
+    defaultModel: "anthropic/claude-sonnet-4.5",
+    capabilityTags: ["router", "multi-model"],
+    signInUrl: null,
+    credentialHelp: "Generate an API key at openrouter.ai → Keys.",
+  },
   {
     key: "github-copilot",
     label: "GitHub Copilot",
diff --git a/AgentCompany-New/src/shared/provider-models.ts b/AgentCompany-New/src/shared/provider-models.ts
index de320fb5..17800966 100644
--- a/AgentCompany-New/src/shared/provider-models.ts
+++ b/AgentCompany-New/src/shared/provider-models.ts
@@ -3,6 +3,26 @@ export interface ProviderModelEntry {
   name: string;
 }
 
+const ANTHROPIC_MODELS: ProviderModelEntry[] = [
+  { id: "claude-opus-4-7", name: "Claude Opus 4.7" },
+  { id: "claude-opus-4-6", name: "Claude Opus 4.6" },
+  { id: "claude-opus-4-5", name: "Claude Opus 4.5 (latest)" },
+  { id: "claude-opus-4-1", name: "Claude Opus 4.1 (latest)" },
+  { id: "claude-opus-4-0", name: "Claude Opus 4 (latest)" },
+  { id: "claude-sonnet-4-6", name: "Claude Sonnet 4.6" },
+  { id: "claude-sonnet-4-5", name: "Claude Sonnet 4.5 (latest)" },
+  { id: "claude-sonnet-4-0", name: "Claude Sonnet 4 (latest)" },
+  { id: "claude-haiku-4-5", name: "Claude Haiku 4.5 (latest)" },
+  { id: "claude-3-7-sonnet-20250219", name: "Claude Sonnet 3.7" },
+  { id: "claude-3-5-sonnet-20241022", name: "Claude Sonnet 3.5 v2" },
+  { id: "claude-3-5-sonnet-20240620", name: "Claude Sonnet 3.5" },
+  { id: "claude-3-5-haiku-latest", name: "Claude Haiku 3.5 (latest)" },
+  { id: "claude-3-5-haiku-20241022", name: "Claude Haiku 3.5" },
+  { id: "claude-3-haiku-20240307", name: "Claude Haiku 3" },
+  { id: "claude-3-sonnet-20240229", name: "Claude Sonnet 3" },
+  { id: "claude-3-opus-20240229", name: "Claude Opus 3" },
+];
+
 export const PROVIDER_MODELS: Record<string, ProviderModelEntry[]> = {
   openai: [
     { id: "gpt-5.4-pro", name: "GPT-5.4 Pro" },
@@ -43,25 +63,8 @@ export const PROVIDER_MODELS: Record<string, ProviderModelEntry[]> = {
     { id: "gpt-4-turbo", name: "GPT-4 Turbo" },
     { id: "gpt-4", name: "GPT-4" },
   ],
-  anthropic: [
-    { id: "claude-opus-4-7", name: "Claude Opus 4.7" },
-    { id: "claude-opus-4-6", name: "Claude Opus 4.6" },
-    { id: "claude-opus-4-5", name: "Claude Opus 4.5 (latest)" },
-    { id: "claude-opus-4-1", name: "Claude Opus 4.1 (latest)" },
-    { id: "claude-opus-4-0", name: "Claude Opus 4 (latest)" },
-    { id: "claude-sonnet-4-6", name: "Claude Sonnet 4.6" },
-    { id: "claude-sonnet-4-5", name: "Claude Sonnet 4.5 (latest)" },
-    { id: "claude-sonnet-4-0", name: "Claude Sonnet 4 (latest)" },
-    { id: "claude-haiku-4-5", name: "Claude Haiku 4.5 (latest)" },
-    { id: "claude-3-7-sonnet-20250219", name: "Claude Sonnet 3.7" },
-    { id: "claude-3-5-sonnet-20241022", name: "Claude Sonnet 3.5 v2" },
-    { id: "claude-3-5-sonnet-20240620", name: "Claude Sonnet 3.5" },
-    { id: "claude-3-5-haiku-latest", name: "Claude Haiku 3.5 (latest)" },
-    { id: "claude-3-5-haiku-20241022", name: "Claude Haiku 3.5" },
-    { id: "claude-3-haiku-20240307", name: "Claude Haiku 3" },
-    { id: "claude-3-sonnet-20240229", name: "Claude Sonnet 3" },
-    { id: "claude-3-opus-20240229", name: "Claude Opus 3" },
-  ],
+  anthropic: ANTHROPIC_MODELS,
+  "claude-pro": ANTHROPIC_MODELS,
   xai: [
     { id: "grok-4", name: "Grok 4" },
     { id: "grok-4-fast", name: "Grok 4 Fast" },
@@ -186,6 +189,43 @@ export const PROVIDER_MODELS: Record<string, ProviderModelEntry[]> = {
     { id: "gemini-1.5-pro", name: "Gemini 1.5 Pro" },
     { id: "gemini-1.5-flash", name: "Gemini 1.5 Flash" },
   ],
+  mistral: [
+    { id: "mistral-large-latest", name: "Mistral Large (latest)" },
+    { id: "mistral-large-2512", name: "Mistral Large 3" },
+    { id: "mistral-medium-latest", name: "Mistral Medium (latest)" },
+    { id: "mistral-medium-2508", name: "Mistral Medium 3.1" },
+    { id: "mistral-small-latest", name: "Mistral Small (latest)" },
+    { id: "mistral-small-2603", name: "Mistral Small 4" },
+    { id: "magistral-medium-latest", name: "Magistral Medium (latest)" },
+    { id: "magistral-small", name: "Magistral Small" },
+    { id: "codestral-latest", name: "Codestral (latest)" },
+    { id: "devstral-medium-latest", name: "Devstral Medium (latest)" },
+    { id: "devstral-small-2507", name: "Devstral Small" },
+    { id: "ministral-8b-latest", name: "Ministral 8B (latest)" },
+    { id: "ministral-3b-latest", name: "Ministral 3B (latest)" },
+    { id: "pixtral-large-latest", name: "Pixtral Large (latest)" },
+    { id: "open-mistral-nemo", name: "Mistral Nemo" },
+  ],
+  cerebras: [
+    { id: "qwen-3-235b-a22b-instruct-2507", name: "Qwen 3 235B Instruct" },
+    { id: "gpt-oss-120b", name: "GPT OSS 120B" },
+    { id: "zai-glm-4.7", name: "Z.AI GLM-4.7" },
+    { id: "llama3.1-8b", name: "Llama 3.1 8B" },
+  ],
+  openrouter: [
+    { id: "anthropic/claude-sonnet-4.5", name: "Anthropic: Claude Sonnet 4.5" },
+    { id: "anthropic/claude-opus-4.5", name: "Anthropic: Claude Opus 4.5" },
+    { id: "anthropic/claude-haiku-4.5", name: "Anthropic: Claude Haiku 4.5" },
+    { id: "openai/gpt-5.2", name: "OpenAI: GPT-5.2" },
+    { id: "openai/gpt-5.1", name: "OpenAI: GPT-5.1" },
+    { id: "google/gemini-3-pro-preview", name: "Google: Gemini 3 Pro Preview" },
+    { id: "google/gemini-2.5-pro", name: "Google: Gemini 2.5 Pro" },
+    { id: "google/gemini-2.5-flash", name: "Google: Gemini 2.5 Flash" },
+    { id: "x-ai/grok-4", name: "xAI: Grok 4" },
+    { id: "deepseek/deepseek-chat", name: "DeepSeek: DeepSeek Chat" },
+    { id: "meta-llama/llama-4-maverick", name: "Meta: Llama 4 Maverick" },
+    { id: "qwen/qwen3-235b-a22b", name: "Qwen: Qwen3 235B A22B" },
+  ],
 };
 
 export function listProviderModels(providerKey: string): ProviderModelEntry[] {
diff --git a/AgentCompany-New/tests/contract/provider-contracts.test.ts b/AgentCompany-New/tests/contract/provider-contracts.test.ts
index 3c37181b..77c065af 100644
--- a/AgentCompany-New/tests/contract/provider-contracts.test.ts
+++ b/AgentCompany-New/tests/contract/provider-contracts.test.ts
@@ -12,8 +12,12 @@ import { PROVIDER_CATALOG } from "../../src/shared/provider-catalog";
 const PROVIDER_SECRET_SAMPLES: Record<string, string> = {
   openai: "sk-live-provider",
   anthropic: "sk-live-provider",
+  "claude-pro": "claude-session-token",
   xai: "sk-live-provider",
   groq: "sk-live-provider",
+  mistral: "sk-live-provider",
+  cerebras: "csk-live-provider",
+  openrouter: "sk-or-live-provider",
   "github-copilot": "ghu_live_provider",
   "google-antigravity": "antigravity-session",
   "gpt-account": "chatgpt-session",
diff --git a/AgentCompany-New/tests/unit/domain-services.test.ts b/AgentCompany-New/tests/unit/domain-services.test.ts
index 8dc9c098..fbc897af 100644
--- a/AgentCompany-New/tests/unit/domain-services.test.ts
+++ b/AgentCompany-New/tests/unit/domain-services.test.ts
@@ -24,7 +24,7 @@ describe("domain services", () => {
     const connection = createConnection();
 
     const rows = connection.db.prepare("select version from schema_migrations order by version asc").all() as Array<{ version: number }>;
-    expect(rows.map((row) => row.version)).toEqual([1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35]);
+    expect(rows.map((row) => row.version)).toEqual([1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36]);
     connection.close();
   });