feat: add Claude Opus 5 model

apps/server/src/mcp/toolkits/subagent/handlers.ts

@@ -472,6 +472,7 @@ const buildModelSources = (runtime: SubagentRuntime) =>
           driverKind: providerInstance.driverKind,
           models: snapshot.models.map((providerModel) => ({
             slug: providerModel.slug,
+            isCustom: providerModel.isCustom,
             optionDescriptors: providerModel.capabilities?.optionDescriptors,
             defaultOptions: buildProviderOptionSelectionsFromDescriptors(
               providerModel.capabilities?.optionDescriptors,

apps/server/src/mcp/toolkits/subagent/tools.ts

@@ -111,7 +111,7 @@ export const ScheduleCreateInput = Schema.Struct({
   intervalSeconds: Schema.optionalKey(Schema.Int),
   cronExpr: Schema.optionalKey(Schema.String),
   timezone: Schema.optionalKey(Schema.String),
-  // Optional plain model name (e.g. "claude-opus-4-8" or "gpt-5.4"); the
+  // Optional plain model name (e.g. "claude-opus-5" or "gpt-5.4"); the
   // provider/harness is inferred from the live model lists, so the caller never
   // guesses a harness/instance id. Omit to inherit the thread's current model.
   model: Schema.optionalKey(TrimmedNonEmptyString),
@@ -196,7 +196,7 @@ export const SubagentsTool = Tool.make("t3_subagents", {
 
 export const ScheduleCreateTool = Tool.make("t3_schedule_create", {
   description:
-    "Schedule a recurring prompt to be sent to a thread (defaults to the calling thread). Provide exactly one of intervalSeconds (fixed interval) or cronExpr (a cron expression, validated on create); timezone defaults to UTC and the busy policy always defaults to skip. The same thread is reused on every trigger. To pin the model each run uses, pass `model` as a plain model name (e.g. 'claude-opus-4-8' or 'gpt-5.4'); the provider/harness is inferred automatically, so you never guess a harness/instance id. Pin a model on the thread's own provider (like the interactive model picker) — pinning a different provider than the thread's active session errors at run time, so prefer a dedicated thread for a cross-provider schedule. Omit `model` to inherit the thread's current model on each run.",
+    "Schedule a recurring prompt to be sent to a thread (defaults to the calling thread). Provide exactly one of intervalSeconds (fixed interval) or cronExpr (a cron expression, validated on create); timezone defaults to UTC and the busy policy always defaults to skip. The same thread is reused on every trigger. To pin the model each run uses, pass `model` as a plain model name (e.g. 'claude-opus-5' or 'gpt-5.4'); the provider/harness is inferred automatically, so you never guess a harness/instance id. Pin a model on the thread's own provider (like the interactive model picker) — pinning a different provider than the thread's active session errors at run time, so prefer a dedicated thread for a cross-provider schedule. Omit `model` to inherit the thread's current model on each run.",
   parameters: ScheduleCreateInput,
   success: ScheduleEntry,
   failure: ThreadStartToolError,

apps/server/src/mcp/toolkits/thread/handlers.ts

@@ -547,6 +547,7 @@ const makeActiveThreadStartRuntime = Effect.fn("ThreadToolkit.makeActiveRuntime"
             driverKind: providerInstance.driverKind,
             models: snapshot.models.map((providerModel) => ({
               slug: providerModel.slug,
+              isCustom: providerModel.isCustom,
               optionDescriptors: providerModel.capabilities?.optionDescriptors,
               defaultOptions: buildProviderOptionSelectionsFromDescriptors(
                 providerModel.capabilities?.optionDescriptors,
@@ -728,6 +729,7 @@ const makeActiveThreadStartRuntime = Effect.fn("ThreadToolkit.makeActiveRuntime"
           driverKind: providerInstance.driverKind,
           models: snapshot.models.map((providerModel) => ({
             slug: providerModel.slug,
+            isCustom: providerModel.isCustom,
             optionDescriptors: providerModel.capabilities?.optionDescriptors,
             defaultOptions: buildProviderOptionSelectionsFromDescriptors(
               providerModel.capabilities?.optionDescriptors,

apps/server/src/provider/Drivers/ClaudeDriver.ts

@@ -19,6 +19,7 @@ import * as Crypto from "effect/Crypto";
 import * as Effect from "effect/Effect";
 import * as FileSystem from "effect/FileSystem";
 import * as Path from "effect/Path";
+import * as Ref from "effect/Ref";
 import * as Schema from "effect/Schema";
 import { HttpClient } from "effect/unstable/http";
 import { ChildProcessSpawner } from "effect/unstable/process";
@@ -32,6 +33,7 @@ import {
   checkClaudeProviderStatus,
   makePendingClaudeProvider,
   probeClaudeCapabilities,
+  reconcileKnownClaudeModelsAfterVersionProbe,
 } from "../Layers/ClaudeProvider.ts";
 import { ProviderEventLoggers } from "../Layers/ProviderEventLoggers.ts";
 import { makeManagedServerProvider } from "../makeManagedServerProvider.ts";
@@ -160,13 +162,23 @@ export const ClaudeDriver: ProviderDriver<ClaudeSettings, ClaudeDriverEnv> = {
           ),
       });
       const capabilitiesCacheKey = yield* makeClaudeCapabilitiesCacheKey(effectiveConfig, cwd);
+      const knownVersionedModels = yield* Ref.make<ServerProvider["models"]>([]);
 
       const checkProvider = checkClaudeProviderStatus(
         effectiveConfig,
         () => Cache.get(capabilitiesProbeCache, capabilitiesCacheKey),
         processEnv,
       ).pipe(
         Effect.map(stampIdentity),
+        Effect.flatMap((nextSnapshot) =>
+          Ref.modify(knownVersionedModels, (knownModels) => {
+            const reconciled = reconcileKnownClaudeModelsAfterVersionProbe(
+              knownModels,
+              nextSnapshot,
+            );
+            return [reconciled.snapshot, reconciled.knownModels];
+          }),
+        ),
         Effect.provideService(ChildProcessSpawner.ChildProcessSpawner, spawner),
         Effect.provideService(Path.Path, path),
       );

apps/server/src/provider/Layers/ClaudeAdapter.test.ts

@@ -658,6 +658,29 @@ describe("ClaudeAdapterLive", () => {
     );
   });
 
+  it.effect("preserves xhigh effort for Claude Opus 5", () => {
+    const harness = makeHarness();
+    return Effect.gen(function* () {
+      const adapter = yield* ClaudeAdapter;
+      yield* adapter.startSession({
+        threadId: THREAD_ID,
+        provider: ProviderDriverKind.make("claudeAgent"),
+        modelSelection: createModelSelection(
+          ProviderInstanceId.make("claudeAgent"),
+          "claude-opus-5",
+          [{ id: "effort", value: "xhigh" }],
+        ),
+        runtimeMode: "full-access",
+      });
+
+      const createInput = harness.getLastCreateQueryInput();
+      assert.equal(createInput?.options.effort, "xhigh");
+    }).pipe(
+      Effect.provideService(Random.Random, makeDeterministicRandomService()),
+      Effect.provide(harness.layer),
+    );
+  });
+
   it.effect("falls back to default effort when unsupported max is requested for Sonnet 4.6", () => {
     const harness = makeHarness();
     return Effect.gen(function* () {
@@ -1435,7 +1458,7 @@ describe("ClaudeAdapterLive", () => {
       const adapter = yield* ClaudeAdapter;
       const requestedModel = createModelSelection(
         ProviderInstanceId.make("claudeAgent"),
-        "claude-fable-5",
+        "claude-opus-5",
       );
       const runtimeEventsFiber = yield* Stream.takeUntil(
         adapter.streamEvents,
@@ -1615,7 +1638,7 @@ describe("ClaudeAdapterLive", () => {
         parent_tool_use_id: null,
         message: {
           id: "assistant-message-effective-model-alias",
-          model: "claude-opus-4-8-20260718",
+          model: "claude-opus-5-20260718",
           content: [{ type: "text", text: "Alias answer" }],
         },
       } as unknown as SDKMessage);
@@ -1628,7 +1651,7 @@ describe("ClaudeAdapterLive", () => {
         session_id: "sdk-session-effective-model-alias",
         uuid: "result-effective-model-alias",
         modelUsage: {
-          "claude-opus-4-8-20260718": {
+          "claude-opus-5-20260718": {
             contextWindow: 1_000_000,
             maxOutputTokens: 128_000,
           },

apps/server/src/provider/Layers/ClaudeAdapter.ts

@@ -518,6 +518,7 @@ function selectedClaudeContextWindow(
   modelSelection: ModelSelection | undefined,
 ): number | undefined {
   switch (modelSelection?.model) {
+    case "claude-opus-5":
     case "claude-opus-4-8":
     case "claude-opus-4-7":
       // Always 1M at the API; these models expose no contextWindow option.