diff --git a/doc/DEVELOPING.md b/doc/DEVELOPING.md
index bfede406dfe..cd669abdfd0 100644
--- a/doc/DEVELOPING.md
+++ b/doc/DEVELOPING.md
@@ -115,6 +115,8 @@ pending card.
 Use **Composer → Model and effort picker** to review harness-specific model
 choices. Codex uses the curated adapter catalog unless the instance declares
 `PAPERCLIP_ADAPTER_MODELS`; general OpenAI API models are not Codex choices.
+The Paperclip Runner Codex profile shows the same known model effort levels.
+Its selected effort is saved with the run and sent to Codex for each turn.
 
 The Storybook visual regression suite uses external PNG baselines instead of
 committed screenshots:
diff --git a/packages/paperclip-runner/src/backends/codex-native-backend.ts b/packages/paperclip-runner/src/backends/codex-native-backend.ts
index 6f8efb8e15a..2c4aeceee18 100644
--- a/packages/paperclip-runner/src/backends/codex-native-backend.ts
+++ b/packages/paperclip-runner/src/backends/codex-native-backend.ts
@@ -145,6 +145,9 @@ function createTransportBackedNativeSessionBackend(
   return new HarnessDriverBackend(
     new CodexAppServerDriver({
       ...(input.provider.model ? { model: input.provider.model } : {}),
+      ...(input.provider.kind === "codex" && "reasoningEffort" in input.provider && input.provider.reasoningEffort
+        ? { reasoningEffort: input.provider.reasoningEffort }
+        : {}),
       // Runnerd owns provider permissions for non-Codex facades. Their
       // Codex-compatible surface must never open a second approval channel.
       approvalPolicy:
diff --git a/packages/paperclip-runner/src/contracts/native-execution.test.ts b/packages/paperclip-runner/src/contracts/native-execution.test.ts
index 65997242524..a2d3a30c8c5 100644
--- a/packages/paperclip-runner/src/contracts/native-execution.test.ts
+++ b/packages/paperclip-runner/src/contracts/native-execution.test.ts
@@ -120,6 +120,21 @@ describe("NativeExecutionInputV1", () => {
       schema: "paperclip.native-execution-input.v4",
       provider: { kind: "codex", approvalPolicy: "on-request" },
     });
+    const withEffort = parseNativeExecutionInput({
+      ...current,
+      schema: NATIVE_EXECUTION_INPUT_SCHEMA,
+      provider: { kind: "codex", model: "gpt-6-astra", approvalPolicy: "on-request", reasoningEffort: "ultra" },
+    });
+    expect(withEffort.provider).toMatchObject({ kind: "codex", reasoningEffort: "ultra" });
+    expect(parseNativeExecutionInput(withEffort)).toEqual(withEffort);
+    expect(() => parseNativeExecutionInput({
+      ...withEffort,
+      provider: { kind: "codex", model: "gpt-6-astra", approvalPolicy: "on-request", reasoningEffort: "impossible" },
+    })).toThrow("reasoningEffort");
+    expect(() => parseNativeExecutionInput({
+      ...current,
+      provider: { kind: "codex", model: null, approvalPolicy: "on-request", reasoningEffort: "ultra" },
+    })).toThrow("input.provider");
     expect(() => parseNativeExecutionInput({
       ...parsed,
       schema: "paperclip.native-execution-input.v4",
diff --git a/packages/paperclip-runner/src/contracts/native-execution.ts b/packages/paperclip-runner/src/contracts/native-execution.ts
index 2d1ec54a8b2..9d089fde854 100644
--- a/packages/paperclip-runner/src/contracts/native-execution.ts
+++ b/packages/paperclip-runner/src/contracts/native-execution.ts
@@ -140,6 +140,10 @@ export type NativeProviderConfigV4 =
       profile: NativeAcpxProfileSnapshot;
     };
 
+export type NativeProviderConfigV5 =
+  | Exclude<NativeProviderConfigV4, { kind: "codex" }>
+  | (Extract<NativeProviderConfigV4, { kind: "codex" }> & { reasoningEffort?: string });
+
 export interface NativeExecutionInputV1 {
   schema: typeof NATIVE_EXECUTION_INPUT_SCHEMA_V1;
   binding: {
@@ -217,8 +221,9 @@ export interface NativeCompletionSources {
   criteria: Array<{ id: string; source: NativeCompletionSource }>;
 }
 
-export interface NativeExecutionInputV5 extends Omit<NativeExecutionInputV4, "schema"> {
+export interface NativeExecutionInputV5 extends Omit<NativeExecutionInputV4, "schema" | "provider"> {
   schema: typeof NATIVE_EXECUTION_INPUT_SCHEMA;
+  provider: NativeProviderConfigV5;
   completionSources?: NativeCompletionSources;
 }
 
@@ -447,7 +452,7 @@ export function parseNativeExecutionInput(value: unknown): NativeExecutionInput
       : provider.kind === "acpx"
         ? ["kind", "agent", "model", isV4 ? "permissionMode" : "permissionPolicy", "profile"]
       : provider.kind === "codex" && isV4
-        ? ["kind", "model", "approvalPolicy"]
+        ? ["kind", "model", "approvalPolicy", ...(isV5 ? ["reasoningEffort"] : [])]
         : provider.kind === "opencode" && isV4
           ? ["kind", "model", "permissionMode"]
           : ["kind", "model"],
@@ -468,7 +473,7 @@ export function parseNativeExecutionInput(value: unknown): NativeExecutionInput
   if (provider.kind === "opencode" && (providerModel === null || !providerModel.includes("/"))) {
     throw new NativeExecutionInputError("input.provider.model is required for opencode in provider/model form");
   }
-  let parsedProvider: NativeProviderConfig;
+  let parsedProvider: NativeProviderConfig | NativeProviderConfigV5;
   if (provider.kind === "claude_managed") {
     if (providerModel === null) {
       throw new NativeExecutionInputError("input.provider.model is required for claude_managed");
@@ -640,12 +645,18 @@ export function parseNativeExecutionInput(value: unknown): NativeExecutionInput
     if (isV4 && provider.approvalPolicy !== "never" && provider.approvalPolicy !== "on-request" && provider.approvalPolicy !== "untrusted") {
       throw new NativeExecutionInputError("input.provider.approvalPolicy must be never, on-request, or untrusted");
     }
+    if (isV5 && provider.reasoningEffort !== undefined && !["minimal", "low", "medium", "high", "xhigh", "max", "ultra"].includes(String(provider.reasoningEffort))) {
+      throw new NativeExecutionInputError("input.provider.reasoningEffort is unsupported");
+    }
     parsedProvider = {
       kind: "codex",
       model: providerModel,
       ...(isV4
         ? { approvalPolicy: provider.approvalPolicy as NativeCodexApprovalPolicy }
         : {}),
+      ...(isV5 && provider.reasoningEffort !== undefined
+        ? { reasoningEffort: text(provider.reasoningEffort, "input.provider.reasoningEffort") }
+        : {}),
     };
   }
   if (!Array.isArray(contract.criteria) || contract.criteria.length === 0) {
@@ -761,6 +772,7 @@ export function parseNativeExecutionInput(value: unknown): NativeExecutionInput
   return {
     ...withPermissions,
     schema: NATIVE_EXECUTION_INPUT_SCHEMA,
+    provider: parsedProvider as NativeProviderConfigV5,
     ...(input.completionSources !== undefined ? { completionSources: parseCompletionSources(input.completionSources) } : {}),
   };
 }
diff --git a/packages/paperclip-runner/src/drivers/codex/codex-app-server-driver-impl.ts b/packages/paperclip-runner/src/drivers/codex/codex-app-server-driver-impl.ts
index 0fba00ebad7..da221eff7fe 100644
--- a/packages/paperclip-runner/src/drivers/codex/codex-app-server-driver-impl.ts
+++ b/packages/paperclip-runner/src/drivers/codex/codex-app-server-driver-impl.ts
@@ -930,6 +930,7 @@ export class CodexAppServerDriver implements HarnessDriver {
       goalCapability: this.#goalCapability,
       dynamicTools: this.#providerDynamicTools(),
       skillInputs: this.#options.skillInputs,
+      reasoningEffort: this.#options.reasoningEffort,
       dynamicToolHandler: this.#options.dynamicToolHandler,
       completionFeedback: this.#options.completionFeedback,
     });
diff --git a/packages/paperclip-runner/src/drivers/codex/codex-app-server-driver.test.ts b/packages/paperclip-runner/src/drivers/codex/codex-app-server-driver.test.ts
index 36480ed9f01..bc000a79251 100644
--- a/packages/paperclip-runner/src/drivers/codex/codex-app-server-driver.test.ts
+++ b/packages/paperclip-runner/src/drivers/codex/codex-app-server-driver.test.ts
@@ -1436,6 +1436,18 @@ describe("Codex app-server Codex driver", () => {
     });
   });
 
+  it("sends the selected reasoning effort with the Codex turn", async () => {
+    const transport = new FakeCodexTransport();
+    const session = await makeDriver([transport], { model: "gpt-6-astra", reasoningEffort: "ultra" }).openSession({
+      runId: "run-effort",
+      normalizedSessionId: "session-effort",
+      workingDirectory: TEST_WORKING_DIRECTORY,
+    });
+    await session.startTurn({ message: { role: "user", text: "Continue" } });
+    expect(transport.calls.find((call) => call.method === "turn/start")?.params).toMatchObject({ effort: "ultra" });
+    await session.close({ reason: "test complete" });
+  });
+
   it("fails closed when the installed app-server does not confirm plan mode", async () => {
     const transport = new FakeCodexTransport();
     transport.confirmCollaborationMode = false;
diff --git a/packages/paperclip-runner/src/drivers/codex/codex-driver-types.ts b/packages/paperclip-runner/src/drivers/codex/codex-driver-types.ts
index 12e6265b6ee..77303d77be4 100644
--- a/packages/paperclip-runner/src/drivers/codex/codex-driver-types.ts
+++ b/packages/paperclip-runner/src/drivers/codex/codex-driver-types.ts
@@ -17,6 +17,8 @@ export interface CodexAppServerDriverOptions {
   taskEnvelope: CodexTaskEnvelope;
   /** Explicit provider model selected by the persisted native execution. */
   model?: string;
+  /** Per-run reasoning effort sent with each Codex turn, including resumed turns. */
+  reasoningEffort?: string;
   approvalPolicy?: "never" | "on-request" | "untrusted";
   baseInstructions?: string;
   includeSkillInstructions?: boolean;
diff --git a/packages/paperclip-runner/src/drivers/codex/codex-harness-session.ts b/packages/paperclip-runner/src/drivers/codex/codex-harness-session.ts
index 5aecc4dd8ab..a7843d516d4 100644
--- a/packages/paperclip-runner/src/drivers/codex/codex-harness-session.ts
+++ b/packages/paperclip-runner/src/drivers/codex/codex-harness-session.ts
@@ -221,6 +221,7 @@ export class CodexHarnessSession
     try {
       response = await this.transport.request("turn/start", {
         threadId: this.opened.threadId,
+        ...(this.reasoningEffort ? { effort: this.reasoningEffort } : {}),
         cwd: this.opened.context.workingDirectory,
         permissions:
           text(record(record(this.opened.context.sandbox).permissionProfile).id) || (requestedMode === "plan"
diff --git a/packages/paperclip-runner/src/drivers/codex/codex-session-state.ts b/packages/paperclip-runner/src/drivers/codex/codex-session-state.ts
index 3664ce23edb..318ad4cc7b5 100644
--- a/packages/paperclip-runner/src/drivers/codex/codex-session-state.ts
+++ b/packages/paperclip-runner/src/drivers/codex/codex-session-state.ts
@@ -101,6 +101,7 @@ export class CodexSessionState {
   readonly goalReasonCode: string | null;
   readonly goalReason: string | null;
   readonly skillInputs: NonNullable<CodexAppServerDriverOptions["skillInputs"]>;
+  readonly reasoningEffort: string | undefined;
   readonly dynamicTools: readonly Readonly<Record<string, unknown>>[];
   readonly completionFeedback: CodexAppServerDriverOptions["completionFeedback"];
   readonly dynamicToolHandler: CodexAppServerDriverOptions["dynamicToolHandler"];
@@ -174,6 +175,7 @@ export class CodexSessionState {
     goalReasonCode: string | null;
     goalReason: string | null;
     skillInputs?: CodexAppServerDriverOptions["skillInputs"];
+    reasoningEffort?: string;
     dynamicTools: readonly Readonly<Record<string, unknown>>[];
     completionFeedback?: CodexAppServerDriverOptions["completionFeedback"];
     dynamicToolHandler?: CodexAppServerDriverOptions["dynamicToolHandler"];
@@ -198,6 +200,7 @@ export class CodexSessionState {
     this.goalReasonCode = input.goalReasonCode;
     this.goalReason = input.goalReason;
     this.skillInputs = structuredClone(input.skillInputs ?? []);
+    this.reasoningEffort = input.reasoningEffort;
     this.dynamicTools = input.dynamicTools;
     this.dynamicToolHandler = input.dynamicToolHandler;
     this.completionFeedback = input.completionFeedback;
diff --git a/server/src/services/heartbeat-runner-provider-config.test.ts b/server/src/services/heartbeat-runner-provider-config.test.ts
index 2b589af21aa..da0a675adbe 100644
--- a/server/src/services/heartbeat-runner-provider-config.test.ts
+++ b/server/src/services/heartbeat-runner-provider-config.test.ts
@@ -3,6 +3,7 @@ import { describe, expect, it } from "vitest";
 import {
   assertAgentCoreProfileRecoveryBinding,
   assertManagedProfileRecoveryBinding,
+  projectPaperclipRunnerTaskConfig,
   resolvePaperclipRunnerNativeProviderInput,
 } from "./native-runtime/provider-profile.js";
 
@@ -44,6 +45,45 @@ describe("Paperclip Runner native provider configuration", () => {
     ).toThrow("codexPermissionMode set to never");
   });
 
+  it("projects Codex effort only when the selected model supports it", () => {
+    expect(resolvePaperclipRunnerNativeProviderInput({
+      backend: "codex_app_server",
+      adapterConfig: { provider: "codex", model: "gpt-6-astra", modelReasoningEffort: "ultra" },
+    })).toMatchObject({ provider: "codex", model: "gpt-6-astra", codexReasoningEffort: "ultra" });
+    expect(() => resolvePaperclipRunnerNativeProviderInput({
+      backend: "codex_app_server",
+      adapterConfig: { provider: "codex", model: "gpt-6-luna", modelReasoningEffort: "ultra" },
+    })).toThrow("reasoning effort is not supported");
+  });
+
+  it("uses only task model and effort overrides without changing the Runner provider", () => {
+    const base = { provider: "codex", model: "gpt-6-astra", modelReasoningEffort: "ultra", codexPermissionMode: "never" };
+    const projected = projectPaperclipRunnerTaskConfig("codex_app_server", base, {
+      provider: "opencode", model: "gpt-6-luna", managedProfileId: "other-profile",
+    });
+    expect(projected).toEqual({ provider: "codex", model: "gpt-6-luna", codexPermissionMode: "never" });
+    expect(resolvePaperclipRunnerNativeProviderInput({
+      backend: "codex_app_server", adapterConfig: projected,
+    })).toEqual({ provider: "codex", model: "gpt-6-luna", codexApprovalPolicy: "never" });
+    expect(projectPaperclipRunnerTaskConfig("codex_app_server", base, { modelReasoningEffort: "high" }))
+      .toMatchObject({ provider: "codex", model: "gpt-6-astra", modelReasoningEffort: "high" });
+  });
+
+  it("uses an OpenCode task model without changing the Runner provider", () => {
+    const projected = projectPaperclipRunnerTaskConfig(
+      "opencode_server",
+      { provider: "opencode", model: "openrouter/qwen/qwen3-coder-next", opencodePermissionMode: "deny" },
+      { provider: "codex", model: "openrouter/deepseek/deepseek-v4-flash-0731", modelReasoningEffort: "ultra" },
+    );
+    expect(projected).toEqual({
+      provider: "opencode", model: "openrouter/deepseek/deepseek-v4-flash-0731", opencodePermissionMode: "deny",
+    });
+    expect(resolvePaperclipRunnerNativeProviderInput({ backend: "opencode_server", adapterConfig: projected }))
+      .toEqual({
+        provider: "opencode", model: "openrouter/deepseek/deepseek-v4-flash-0731", opencodePermissionMode: "deny",
+      });
+  });
+
   it("requires persisted Claude recovery to use the qualified identity and current profile secret", () => {
     const stored = {
       id: "00000000-0000-4000-8000-000000000001",
diff --git a/server/src/services/heartbeat.ts b/server/src/services/heartbeat.ts
index 31226e6fe4b..5202327ddf3 100644
--- a/server/src/services/heartbeat.ts
+++ b/server/src/services/heartbeat.ts
@@ -253,6 +253,7 @@ import {
 import {
   assertAgentCoreProfileRecoveryBinding,
   assertManagedProfileRecoveryBinding,
+  projectPaperclipRunnerTaskConfig,
   resolvePaperclipRunnerNativeProviderInput,
 } from "./native-runtime/provider-profile.js";
 import {
@@ -23771,7 +23772,14 @@ export function heartbeatService(
                         : null,
                     ...resolvePaperclipRunnerNativeProviderInput({
                       backend: nativeRuntimeResolution.profile.backend,
-                      adapterConfig: agent.adapterConfig,
+                      adapterConfig: nativeRuntimeResolution.profile.backend === "codex_app_server"
+                        || nativeRuntimeResolution.profile.backend === "opencode_server"
+                        ? projectPaperclipRunnerTaskConfig(
+                            nativeRuntimeResolution.profile.backend,
+                            agent.adapterConfig,
+                            issueAssigneeOverrides?.adapterConfig,
+                          )
+                        : agent.adapterConfig,
                       managedProfile,
                       agentCoreProfile,
                     }),
diff --git a/server/src/services/native-runtime/native-execution-input.test.ts b/server/src/services/native-runtime/native-execution-input.test.ts
index 79d93e14ad5..9df5a0f51fe 100644
--- a/server/src/services/native-runtime/native-execution-input.test.ts
+++ b/server/src/services/native-runtime/native-execution-input.test.ts
@@ -18,11 +18,14 @@ describe("LCA-05 explicit native work mode", () => {
         taskPrompt: text,
         workspace: { id: "50000000-0000-4000-8000-000000000005", cwd: "/workspace", repoUrl: null, repoRef: null, branchName: null },
         normalizedSessionId: null,
+        provider: "codex",
+        codexReasoningEffort: "high",
         planningContext: workMode === "planning" ? { documentId: null, baseRevisionId: null, baseRevisionNumber: 0, markdown: "", sha256: "a".repeat(64), reviewContext: {} } : null,
         completionContract: { id: "70000000-0000-4000-8000-000000000007", sha256: `sha256:${"a".repeat(64)}`, schemaVersion: "paperclip.run-result.v1", contract: { revision: "1", objective: "Deliver the requested work", criteria: [{ id: "output", requirement: "Deliver the requested work" }] } },
         runtimeContext: nativeRuntimeContextFixture(),
       });
       expect(input.task.workMode).toBe(workMode);
+      expect(input.provider).toMatchObject({ kind: "codex", reasoningEffort: "high" });
       expect(input.executionMode).toBe(workMode === "planning" ? "plan" : "default");
       expect(input.task.title).toBe(text);
     }
diff --git a/server/src/services/native-runtime/native-execution-input.ts b/server/src/services/native-runtime/native-execution-input.ts
index 3ec83f06617..27f7c9f2c36 100644
--- a/server/src/services/native-runtime/native-execution-input.ts
+++ b/server/src/services/native-runtime/native-execution-input.ts
@@ -66,6 +66,7 @@ export function buildNativeExecutionInput(input: {
   provider?: "codex" | "opencode" | "claude_managed" | "aws_agentcore" | "acpx";
   acpxAgent?: NativeAcpxAgent;
   codexApprovalPolicy?: NativeCodexApprovalPolicy;
+  codexReasoningEffort?: string;
   opencodePermissionMode?: NativeOpenCodePermissionMode;
   acpxPermissionMode?: NativeAcpxPermissionMode;
   model?: string | null;
@@ -281,6 +282,7 @@ export function buildNativeExecutionInput(input: {
             kind: "codex",
             model: input.model ?? null,
             approvalPolicy: input.codexApprovalPolicy ?? "never",
+            ...(input.codexReasoningEffort ? { reasoningEffort: input.codexReasoningEffort } : {}),
           },
     completionContract: {
       id: input.completionContract.id,
diff --git a/server/src/services/native-runtime/provider-profile.ts b/server/src/services/native-runtime/provider-profile.ts
index 2a6f6ed12d9..371c04ac593 100644
--- a/server/src/services/native-runtime/provider-profile.ts
+++ b/server/src/services/native-runtime/provider-profile.ts
@@ -5,6 +5,10 @@ import {
   resolvePaperclipRunnerPermissionMode,
   type PaperclipRunnerProvider,
 } from "@paperclipai/adapter-utils";
+import {
+  codexLocalReasoningEffortsForModel,
+  isCodexLocalKnownModel,
+} from "@paperclipai/adapter-codex-local";
 import {
   AGENTCORE_QUALIFIED_MODEL,
   CLAUDE_MANAGED_QUALIFIED_MODEL,
@@ -63,6 +67,7 @@ export type PaperclipRunnerNativeProviderInput =
       provider: "codex";
       model: string | null;
       codexApprovalPolicy: "never" | "on-request" | "untrusted";
+      codexReasoningEffort?: string;
     }
   | {
       provider: "opencode";
@@ -138,6 +143,29 @@ function optionalString(value: unknown): string | null {
     : null;
 }
 
+/** A task may change a local Runner model (and Codex effort), but not provider identity. */
+export function projectPaperclipRunnerTaskConfig(
+  backend: "codex_app_server" | "opencode_server",
+  agentConfig: unknown,
+  taskOverrides: unknown,
+): Record<string, unknown> {
+  const base = asRecord(agentConfig);
+  const task = asRecord(taskOverrides);
+  const config = { ...base };
+  const model = optionalString(task.model);
+  const effortKey = backend === "codex_app_server"
+    ? ["modelReasoningEffort", "reasoningEffort", "effort"].find((key) => key in task)
+    : undefined;
+  if (backend === "codex_app_server" && ((model !== null && model !== optionalString(base.model)) || effortKey !== undefined)) {
+    delete config.modelReasoningEffort;
+    delete config.reasoningEffort;
+    delete config.effort;
+  }
+  if (model !== null) config.model = model;
+  if (effortKey !== undefined) config.modelReasoningEffort = task[effortKey];
+  return config;
+}
+
 function positiveNumberOrNull(
   value: unknown,
   code: string,
@@ -650,6 +678,18 @@ export function resolvePaperclipRunnerNativeProviderInput(input: {
       },
     };
   }
+  const effort = config.modelReasoningEffort ?? config.reasoningEffort ?? config.effort;
+  const allowedEfforts = ["minimal", "low", "medium", "high", "xhigh", "max", "ultra"];
+  if (effort !== undefined && effort !== null && effort !== "" && (
+    typeof effort !== "string" || !allowedEfforts.includes(effort)
+    || (profile.model && isCodexLocalKnownModel(profile.model)
+      && !codexLocalReasoningEffortsForModel(profile.model).includes(effort as "minimal" | "low" | "medium" | "high" | "xhigh" | "max" | "ultra"))
+  )) {
+    throw new PaperclipRunnerProviderProfileError(
+      "paperclip_runner_codex_effort_invalid",
+      "Paperclip Runner Codex reasoning effort is not supported for this model.",
+    );
+  }
   return {
     provider: "codex",
     model: profile.model,
@@ -657,5 +697,6 @@ export function resolvePaperclipRunnerNativeProviderInput(input: {
       "codex",
       config.codexPermissionMode,
     ) as "never" | "on-request" | "untrusted",
+    ...(typeof effort === "string" && effort ? { codexReasoningEffort: effort } : {}),
   };
 }
diff --git a/ui/src/components/task-chat/ComposerRunSettingsPicker.tsx b/ui/src/components/task-chat/ComposerRunSettingsPicker.tsx
index d16e52a42c7..f3b6025126a 100644
--- a/ui/src/components/task-chat/ComposerRunSettingsPicker.tsx
+++ b/ui/src/components/task-chat/ComposerRunSettingsPicker.tsx
@@ -136,7 +136,8 @@ export function ComposerRunSettingsPicker({
   const filteredModels = models.filter((item) =>
     `${item.label} ${item.id}`.toLowerCase().includes(query.toLowerCase()));
   const exactMatch = models.some((item) => item.id.toLowerCase() === query.toLowerCase());
-  const needsProvider = agent && ["opencode_local", "pi_local", "kimi_local"].includes(agent.adapterType);
+  const needsProvider = agent && (["opencode_local", "pi_local", "kimi_local"].includes(agent.adapterType)
+    || (agent.adapterType === "paperclip_runner" && provider === "opencode"));
   const manualValid = query.length > 0 && !/\s/.test(query)
     && (!needsProvider || /^[^/]+\/.+[^/]$/.test(query))
     && (provider !== "openrouter" || /^openrouter\/[^/]+\/.+[^/]$/.test(query));
diff --git a/ui/src/components/task-chat/composer-run-settings.test.ts b/ui/src/components/task-chat/composer-run-settings.test.ts
index 8f57ee20b7a..7e55eb5e7ba 100644
--- a/ui/src/components/task-chat/composer-run-settings.test.ts
+++ b/ui/src/components/task-chat/composer-run-settings.test.ts
@@ -12,6 +12,8 @@ const agent = (adapterType: Agent["adapterType"], provider?: string) => ({
 describe("composer run settings", () => {
   it("shows only effort levels known for the selected harness and model", () => {
     expect(composerEfforts(agent("codex_local"), "gpt-6-astra", [])).toContain("ultra");
+    expect(composerEfforts(agent("paperclip_runner", "codex"), "gpt-6-astra", [])).toContain("ultra");
+    expect(composerEfforts(agent("paperclip_runner", "opencode"), "gpt-6-astra", [])).toEqual([]);
     expect(composerEfforts(agent("codex_local"), "custom-private-model", [])).toEqual([]);
     expect(composerEfforts(agent("opencode_local"), "openrouter/x/y", ["openrouter/x/y"])).toEqual([]);
     expect(composerEfforts(agent("kimi_local"), "kimi-code/k3", ["kimi-code/k3"])).toEqual(["low", "high", "max"]);
@@ -32,5 +34,8 @@ describe("composer run settings", () => {
     expect(readComposerRunSettings({ adapterConfig: { reasoningEffort: "xhigh" } }, "codex_local").effort).toBe("xhigh");
     expect(mergeComposerRunSettings(previous, "codex_local", { model: "gpt-6-astra", effort: "ultra", fast: true }, true))
       .toEqual({ adapterConfig: { model: "gpt-6-astra", modelReasoningEffort: "ultra", fastMode: true } });
+    const runner = mergeComposerRunSettings(null, "paperclip_runner", { model: "gpt-6-astra", effort: "ultra", fast: false });
+    expect(runner).toEqual({ adapterConfig: { model: "gpt-6-astra", modelReasoningEffort: "ultra" } });
+    expect(readComposerRunSettings(runner, "paperclip_runner").effort).toBe("ultra");
   });
 });
diff --git a/ui/src/components/task-chat/composer-run-settings.ts b/ui/src/components/task-chat/composer-run-settings.ts
index 7e1da94a42b..d24a2c414af 100644
--- a/ui/src/components/task-chat/composer-run-settings.ts
+++ b/ui/src/components/task-chat/composer-run-settings.ts
@@ -35,7 +35,7 @@ export function composerCatalogProvider(agent: Agent | undefined): string | unde
 
 export function composerEfforts(agent: Agent | undefined, model: string, catalogIds: readonly string[]): readonly string[] {
   if (!agent || !model) return [];
-  if (agent.adapterType === "codex_local") {
+  if (agent.adapterType === "codex_local" || (agent.adapterType === "paperclip_runner" && composerCatalogProvider(agent) === "codex")) {
     return isCodexLocalKnownModel(model) ? codexLocalReasoningEffortsForModel(model) : [];
   }
   if (!catalogIds.includes(model)) return [];
@@ -53,7 +53,7 @@ export function readComposerRunSettings(overrides: IssueAssigneeAdapterOverrides
   const config = overrides?.adapterConfig ?? {};
   const effortKey = composerEffortKey(adapterType);
   const effortValue = effortKey && (config[effortKey]
-    ?? (adapterType === "codex_local" ? config.reasoningEffort ?? config.effort : undefined));
+    ?? (adapterType === "codex_local" || adapterType === "paperclip_runner" ? config.reasoningEffort ?? config.effort : undefined));
   return {
     model: typeof config.model === "string" ? config.model : null,
     effort: typeof effortValue === "string" ? effortValue : null,
@@ -62,7 +62,7 @@ export function readComposerRunSettings(overrides: IssueAssigneeAdapterOverrides
 }
 
 function composerEffortKey(adapterType: string | undefined): string | null {
-  if (adapterType === "codex_local") return "modelReasoningEffort";
+  if (adapterType === "codex_local" || adapterType === "paperclip_runner") return "modelReasoningEffort";
   if (adapterType === "claude_local" || adapterType === "kimi_local") return "effort";
   if (adapterType === "pi_local") return "thinking";
   if (adapterType === "opencode_local") return "variant";
diff --git a/ui/storybook/prototypes/composer-model-picker/fixtures.ts b/ui/storybook/prototypes/composer-model-picker/fixtures.ts
index 0e7a01136cd..e76cc91253f 100644
--- a/ui/storybook/prototypes/composer-model-picker/fixtures.ts
+++ b/ui/storybook/prototypes/composer-model-picker/fixtures.ts
@@ -90,7 +90,7 @@ export function effortChoices(agent: ComposerAgent, model: string): readonly str
 }
 
 export function fastModeAvailable(agent: ComposerAgent, model: string): boolean {
-  return (agent.adapterType === "codex_local" || agent.id === "runner")
+  return agent.adapterType === "codex_local"
     && isCodexLocalKnownModel(model)
     && isCodexLocalFastModeSupported(model);
 }
diff --git a/ui/storybook/stories/composer-model-picker.stories.tsx b/ui/storybook/stories/composer-model-picker.stories.tsx
index ec421f5faf8..7038aaa022f 100644
--- a/ui/storybook/stories/composer-model-picker.stories.tsx
+++ b/ui/storybook/stories/composer-model-picker.stories.tsx
@@ -139,6 +139,10 @@ export const RunnerCodexProfile: Story = {
   name: "16 · Runner · Codex profile",
   args: { agentId: "runner", initialPanel: "models" },
 };
+export const RunnerCodexEffort: Story = {
+  name: "16b · Runner · Codex effort",
+  args: { agentId: "runner", initialPanel: "settings", initialModel: "gpt-6-astra", initialEffort: "high" },
+};
 export const GrokModelOnly: Story = {
   name: "17 · Grok · model only",
   args: { agentId: "grok", initialPanel: "settings" },
@@ -250,6 +254,16 @@ export const ProductionComposer: Story = {
   },
 };
 
+export const ProductionRunnerCodexEffort: Story = {
+  name: "23a · App Runner picker with Codex effort",
+  render: () => <ComposerRunSettingsLiveStory agentId="runner" initialPanel="settings" initialModel="gpt-6-astra" initialEffort="high" />,
+  play: async ({ canvasElement }) => {
+    const screen = within(canvasElement.ownerDocument.body);
+    await expect(screen.getByRole("slider", { name: "Effort" })).toBeVisible();
+    await expect(screen.getByTestId("selected-effort")).toHaveTextContent("High");
+  },
+};
+
 export const ProductionMobileComposer: Story = {
   name: "23b · App picker on mobile",
   render: () => <ComposerRunSettingsLiveStory initialPanel="settings" mobile compact />,
@@ -262,6 +276,17 @@ export const ProductionMobileComposer: Story = {
   },
 };
 
+export const ProductionMobileRunnerCodexEffort: Story = {
+  name: "23c · App Runner Codex effort on mobile",
+  render: () => <ComposerRunSettingsLiveStory agentId="runner" initialPanel="settings" initialModel="gpt-6-astra" mobile compact />,
+  globals: { viewport: { value: "mobile1", isRotated: false } },
+  play: async ({ canvasElement }) => {
+    const screen = within(canvasElement.ownerDocument.body);
+    await expect(screen.getByTestId("composer-mobile-dialog")).toBeVisible();
+    await expect(screen.getByRole("slider", { name: "Effort" })).toBeVisible();
+  },
+};
+
 export const IntermediateWidthPlan: Story = {
   name: "24 · Narrow desktop with Plan and open picker",
   args: { compact: true, initialMode: "planning", initialPanel: "settings" },