diff --git a/src/acp/control-plane/manager.background-task.test.ts b/src/acp/control-plane/manager.background-task.test.ts
index 7731163f7413..0f1c5e8ca9c7 100644
--- a/src/acp/control-plane/manager.background-task.test.ts
+++ b/src/acp/control-plane/manager.background-task.test.ts
@@ -1,10 +1,13 @@
 /** Regression coverage for ACP background-task summary truncation boundaries. */
 import { describe, expect, it } from "vitest";
 import type { OpenClawConfig } from "../../config/types.openclaw.js";
+import { AcpRuntimeError } from "../runtime/errors.js";
 import {
   appendBackgroundTaskProgressSummary,
   resolveBackgroundTaskContext,
+  resolveBackgroundTaskFailureStatus,
 } from "./manager.background-task.js";
+import { ACP_TURN_TIMEOUT_DETAIL_CODE } from "./manager.turn-timeout.js";
 import type { AcpSessionManagerDeps } from "./manager.types.js";
 
 // U+1F99E (🦞) is a surrogate pair in UTF-16; a raw .slice() boundary can split it.
@@ -65,3 +68,20 @@ describe("resolveBackgroundTaskContext", () => {
     expect(context?.task).toBe(`summarize ${LOBSTER} feedback`);
   });
 });
+
+describe("resolveBackgroundTaskFailureStatus", () => {
+  it("uses the structured timeout detail instead of message text", () => {
+    expect(
+      resolveBackgroundTaskFailureStatus(
+        new AcpRuntimeError("ACP_TURN_FAILED", "turn deadline reached", {
+          detailCode: ACP_TURN_TIMEOUT_DETAIL_CODE,
+        }),
+      ),
+    ).toBe("timed_out");
+    expect(
+      resolveBackgroundTaskFailureStatus(
+        new AcpRuntimeError("ACP_TURN_FAILED", "backend said the request timed out"),
+      ),
+    ).toBe("failed");
+  });
+});
diff --git a/src/acp/control-plane/manager.background-task.ts b/src/acp/control-plane/manager.background-task.ts
index e11579ead44f..5eda1ff771ac 100644
--- a/src/acp/control-plane/manager.background-task.ts
+++ b/src/acp/control-plane/manager.background-task.ts
@@ -11,6 +11,7 @@ import {
 import { resolveRequiredCompletionTerminalResult } from "../../tasks/task-completion-contract.js";
 import { deliveryContextFromSession, type DeliveryContext } from "../../utils/delivery-context.js";
 import { AcpRuntimeError } from "../runtime/errors.js";
+import { ACP_TURN_TIMEOUT_DETAIL_CODE } from "./manager.turn-timeout.js";
 import type { AcpSessionManagerDeps } from "./manager.types.js";
 import { normalizeText } from "./runtime-options.js";
 
@@ -55,7 +56,7 @@ export function appendBackgroundTaskProgressSummary(current: string, chunk: stri
 
 /** Maps ACP runtime failures to detached-task terminal states. */
 export function resolveBackgroundTaskFailureStatus(error: AcpRuntimeError): "failed" | "timed_out" {
-  return /\btimed out\b/i.test(error.message) ? "timed_out" : "failed";
+  return error.detailCode === ACP_TURN_TIMEOUT_DETAIL_CODE ? "timed_out" : "failed";
 }
 
 /** Infers blocked terminal outcomes from final progress text when the child turn reports one. */
diff --git a/src/acp/control-plane/manager.turn-runner.ts b/src/acp/control-plane/manager.turn-runner.ts
index 9552a3b82412..3f7461a2cbf9 100644
--- a/src/acp/control-plane/manager.turn-runner.ts
+++ b/src/acp/control-plane/manager.turn-runner.ts
@@ -121,6 +121,7 @@ export async function runManagerTurn(params: {
         ? new AcpRuntimeError(
             error.code,
             `All ACP backends failed (${backendAttempts.length}): ${failedBackends}`,
+            { detailCode: error.detailCode },
           )
         : error;
     params.recordTurnCompletion({
diff --git a/src/agents/agent-run-terminal-error.ts b/src/agents/agent-run-terminal-error.ts
new file mode 100644
index 000000000000..43877619615b
--- /dev/null
+++ b/src/agents/agent-run-terminal-error.ts
@@ -0,0 +1,27 @@
+/** Carries and discovers canonical terminal outcomes through thrown-error boundaries. */
+import type { AgentRunTerminalOutcome } from "./agent-run-terminal-outcome.js";
+
+/** Carries a canonical terminal outcome when an embedded attempt exits by throwing. */
+export class AgentRunTerminalOutcomeError extends Error {
+  readonly terminalOutcome: AgentRunTerminalOutcome;
+
+  constructor(error: unknown, terminalOutcome: AgentRunTerminalOutcome) {
+    super(error instanceof Error ? error.message : String(error), { cause: error });
+    this.name = "AgentRunTerminalOutcomeError";
+    this.terminalOutcome = terminalOutcome;
+  }
+}
+
+/** Finds a canonical terminal outcome through ordinary error wrapper boundaries. */
+export function findAgentRunTerminalOutcome(error: unknown): AgentRunTerminalOutcome | undefined {
+  let candidate = error;
+  const seen = new Set<object>();
+  while (candidate && typeof candidate === "object" && !seen.has(candidate)) {
+    seen.add(candidate);
+    if (candidate instanceof AgentRunTerminalOutcomeError) {
+      return candidate.terminalOutcome;
+    }
+    candidate = (candidate as { cause?: unknown }).cause;
+  }
+  return undefined;
+}
diff --git a/src/agents/agent-run-terminal-outcome.test.ts b/src/agents/agent-run-terminal-outcome.test.ts
index e70ee591484d..be918fb8f57b 100644
--- a/src/agents/agent-run-terminal-outcome.test.ts
+++ b/src/agents/agent-run-terminal-outcome.test.ts
@@ -2,6 +2,8 @@
 import { describe, expect, it } from "vitest";
 import {
   buildAgentRunTerminalOutcome,
+  buildAgentRunTerminalOutcomeFromLifecycleEvent,
+  classifyAgentRunTerminalOutcome,
   mergeAgentRunAttemptTerminal,
   mergeAgentRunTerminalOutcome,
   normalizeAgentRunAttemptTerminal,
@@ -11,6 +13,46 @@ import {
 } from "./agent-run-terminal-outcome.js";
 
 describe("agent run terminal outcome", () => {
+  it.each([
+    ["completed", "success"],
+    ["hard_timeout", "timeout"],
+    ["timed_out", "timeout"],
+    ["cancelled", "cancellation"],
+    ["aborted", "cancellation"],
+    ["blocked", "failure"],
+    ["abandoned", "failure"],
+    ["failed", "failure"],
+  ] as const)("classifies %s as %s", (reason, classification) => {
+    expect(classifyAgentRunTerminalOutcome({ reason })).toBe(classification);
+  });
+
+  it("normalizes lifecycle signals with timeout, cancellation, failure precedence", () => {
+    expect(
+      buildAgentRunTerminalOutcomeFromLifecycleEvent({
+        phase: "end",
+        data: { aborted: true },
+      }),
+    ).toMatchObject({ reason: "aborted", status: "error", stopReason: "aborted" });
+    expect(
+      buildAgentRunTerminalOutcomeFromLifecycleEvent({
+        phase: "end",
+        data: { aborted: true, stopReason: "timeout", timeoutPhase: "provider" },
+      }),
+    ).toMatchObject({ reason: "hard_timeout", status: "timeout" });
+    expect(
+      buildAgentRunTerminalOutcomeFromLifecycleEvent({
+        phase: "error",
+        data: { error: "provider failed" },
+      }),
+    ).toMatchObject({ reason: "failed", status: "error", error: "provider failed" });
+    expect(
+      buildAgentRunTerminalOutcomeFromLifecycleEvent({
+        phase: "end",
+        data: { status: "cancelled", stopReason: "relay-closed" },
+      }),
+    ).toMatchObject({ reason: "cancelled", status: "error", stopReason: "relay-closed" });
+  });
+
   it("treats provider/preflight/post-turn timeout phases as hard run timeouts", () => {
     expect(
       ["preflight", "provider", "post_turn", "queue", "gateway_draining"].map(
diff --git a/src/agents/agent-run-terminal-outcome.ts b/src/agents/agent-run-terminal-outcome.ts
index efbc66fa2f3a..5f5450bc7424 100644
--- a/src/agents/agent-run-terminal-outcome.ts
+++ b/src/agents/agent-run-terminal-outcome.ts
@@ -402,16 +402,19 @@ export function projectAgentRunAttemptTerminal(terminal: AgentRunAttemptTerminal
   };
 }
 
+const AGENT_RUN_TERMINAL_CLASSIFICATION = {
+  completed: "success",
+  hard_timeout: "timeout",
+  timed_out: "timeout",
+  cancelled: "cancellation",
+  aborted: "cancellation",
+  blocked: "failure",
+  abandoned: "failure",
+  failed: "failure",
+} as const;
+
 /** Normalized terminal reason for an agent run. */
-type AgentRunTerminalReason =
-  | "completed"
-  | "hard_timeout"
-  | "timed_out"
-  | "cancelled"
-  | "aborted"
-  | "blocked"
-  | "abandoned"
-  | "failed";
+type AgentRunTerminalReason = keyof typeof AGENT_RUN_TERMINAL_CLASSIFICATION;
 
 /** Normalized terminal outcome for an agent run. */
 export type AgentRunTerminalOutcome = {
@@ -426,29 +429,9 @@ export type AgentRunTerminalOutcome = {
   endedAt?: number;
 };
 
-/** Carries a canonical terminal outcome when an embedded attempt exits by throwing. */
-export class AgentRunTerminalOutcomeError extends Error {
-  readonly terminalOutcome: AgentRunTerminalOutcome;
-
-  constructor(error: unknown, terminalOutcome: AgentRunTerminalOutcome) {
-    super(error instanceof Error ? error.message : String(error), { cause: error });
-    this.name = "AgentRunTerminalOutcomeError";
-    this.terminalOutcome = terminalOutcome;
-  }
-}
-
-/** Finds a canonical terminal outcome through ordinary error wrapper boundaries. */
-export function findAgentRunTerminalOutcome(error: unknown): AgentRunTerminalOutcome | undefined {
-  let candidate = error;
-  const seen = new Set<object>();
-  while (candidate && typeof candidate === "object" && !seen.has(candidate)) {
-    seen.add(candidate);
-    if (candidate instanceof AgentRunTerminalOutcomeError) {
-      return candidate.terminalOutcome;
-    }
-    candidate = (candidate as { cause?: unknown }).cause;
-  }
-  return undefined;
+/** Collapses terminal reasons into the four projections shared by run consumers. */
+export function classifyAgentRunTerminalOutcome(outcome: Pick<AgentRunTerminalOutcome, "reason">) {
+  return AGENT_RUN_TERMINAL_CLASSIFICATION[outcome.reason];
 }
 
 /** Raw terminal input collected from run wait/liveness/timeout paths. */
@@ -468,6 +451,11 @@ type AgentRunTerminalWaitInput = Omit<AgentRunTerminalInput, "status"> & {
   status?: unknown;
 };
 
+type AgentRunLifecycleTerminalData = Omit<AgentRunTerminalWaitInput, "status"> & {
+  aborted?: unknown;
+  status?: unknown;
+};
+
 /** Shared grace window for terminal observations that may still be followed by a retry. */
 export const AGENT_RUN_TERMINAL_RETRY_GRACE_MS = 15_000;
 
@@ -574,6 +562,64 @@ export function buildAgentRunTerminalOutcome(
   };
 }
 
+/** Builds the canonical outcome directly from a terminal lifecycle event. */
+export function buildAgentRunTerminalOutcomeFromLifecycleEvent(input: {
+  phase: "end" | "error";
+  data?: AgentRunLifecycleTerminalData;
+  abortSignal?: AbortSignal;
+  startedAt?: unknown;
+  endedAt?: unknown;
+}): AgentRunTerminalOutcome {
+  const data = input.data;
+  const abortFields =
+    typeof data?.aborted === "boolean"
+      ? {}
+      : resolveAgentRunAbortLifecycleFields(input.abortSignal);
+  const stopReason = asNonEmptyString(data?.stopReason) ?? abortFields.stopReason;
+  const timeoutPhase = normalizeAgentRunTimeoutPhase(data?.timeoutPhase);
+  const lifecycleStatus = asNonEmptyString(data?.status)?.toLowerCase();
+  // Bare `aborted` is cancellation; timeout needs a structured status, stop
+  // reason, or phase so legacy lifecycle gaps cannot turn user stops into timeouts.
+  const timedOut =
+    stopReason === "timeout" ||
+    timeoutPhase !== undefined ||
+    lifecycleStatus === "timeout" ||
+    lifecycleStatus === "timed_out";
+  const aborted =
+    data?.aborted === true || abortFields.aborted === true || lifecycleStatus === "aborted";
+  const cancellationStatus =
+    lifecycleStatus === "cancelled" ||
+    lifecycleStatus === "canceled" ||
+    lifecycleStatus === "aborted";
+  const cancelled = cancellationStatus || aborted;
+  const failed =
+    input.phase === "error" ||
+    lifecycleStatus === "error" ||
+    lifecycleStatus === "failed" ||
+    stopReason === "error";
+  const normalizedStopReason =
+    !timedOut &&
+    cancelled &&
+    !isAbortedAgentStopReason(stopReason) &&
+    !isCancellationStopReason(stopReason) &&
+    (stopReason === undefined || cancellationStatus)
+      ? aborted
+        ? "aborted"
+        : "stop"
+      : stopReason;
+  const outcome = buildAgentRunTerminalOutcome({
+    status: timedOut ? "timeout" : cancelled || failed ? "error" : "ok",
+    error: data?.error,
+    stopReason: normalizedStopReason,
+    livenessState: data?.livenessState,
+    timeoutPhase,
+    providerStarted: data?.providerStarted,
+    startedAt: input.startedAt ?? data?.startedAt,
+    endedAt: input.endedAt ?? data?.endedAt,
+  });
+  return stopReason && outcome.stopReason !== stopReason ? { ...outcome, stopReason } : outcome;
+}
+
 function hasRestartAbortReason(value: unknown): boolean {
   let candidate = value;
   for (let depth = 0; depth < 3; depth += 1) {
diff --git a/src/agents/command/lifecycle.ts b/src/agents/command/lifecycle.ts
index 438008e2dca9..9bdee7103ac4 100644
--- a/src/agents/command/lifecycle.ts
+++ b/src/agents/command/lifecycle.ts
@@ -2,7 +2,7 @@ import { emitAgentEvent } from "../../infra/agent-events.js";
 import { formatErrorMessage } from "../../infra/errors.js";
 import { createSubsystemLogger } from "../../logging/subsystem.js";
 import {
-  buildAgentRunTerminalOutcome,
+  buildAgentRunTerminalOutcomeFromLifecycleEvent,
   type AgentRunTerminalOutcome,
 } from "../agent-run-terminal-outcome.js";
 import type { EmbeddedAgentRunEntryTerminal } from "../embedded-agent-runner/run-entry.js";
@@ -35,20 +35,7 @@ export function resolveAgentRunLifecycleEndLogLevel(meta: {
   timeoutPhase?: unknown;
   providerStarted?: unknown;
 }): "info" | "warn" | "error" | undefined {
-  const status =
-    meta.stopReason === "timeout" || meta.timeoutPhase
-      ? "timeout"
-      : meta.aborted === true || meta.error || meta.stopReason === "error"
-        ? "error"
-        : "ok";
-  const outcome = buildAgentRunTerminalOutcome({
-    status,
-    error: meta.error,
-    stopReason: meta.stopReason,
-    livenessState: meta.livenessState,
-    timeoutPhase: meta.timeoutPhase,
-    providerStarted: meta.providerStarted,
-  });
+  const outcome = buildAgentRunTerminalOutcomeFromLifecycleEvent({ phase: "end", data: meta });
   return resolveTerminalLogLevel(outcome);
 }
 
diff --git a/src/agents/embedded-agent-runner/run/attempt.ts b/src/agents/embedded-agent-runner/run/attempt.ts
index f9094f6b4388..917a44b5e695 100644
--- a/src/agents/embedded-agent-runner/run/attempt.ts
+++ b/src/agents/embedded-agent-runner/run/attempt.ts
@@ -6,8 +6,8 @@ import {
 import { resolveContextEngineOwnerPluginId } from "../../../context-engine/registry.js";
 import { createBundleLspToolRuntime } from "../../agent-bundle-lsp-runtime.js";
 import { materializeBundleMcpToolsForRun } from "../../agent-bundle-mcp-tools.js";
+import { AgentRunTerminalOutcomeError } from "../../agent-run-terminal-error.js";
 import {
-  AgentRunTerminalOutcomeError,
   buildAgentRunTerminalOutcomeFromAttempt,
   mergeAgentRunAttemptTerminal,
   projectAgentRunAttemptTerminal,
diff --git a/src/agents/model-fallback-attempt.ts b/src/agents/model-fallback-attempt.ts
index 9ca48715f471..16135009e747 100644
--- a/src/agents/model-fallback-attempt.ts
+++ b/src/agents/model-fallback-attempt.ts
@@ -5,7 +5,7 @@ import type { OpenClawConfig } from "../config/types.openclaw.js";
 import { isCronTerminalAbortReasonText } from "../cron/service/execution-errors.js";
 import { formatErrorMessage, toErrorObject } from "../infra/errors.js";
 import { isCommandLaneTaskTimeoutError } from "../process/command-queue.js";
-import { findAgentRunTerminalOutcome } from "./agent-run-terminal-outcome.js";
+import { findAgentRunTerminalOutcome } from "./agent-run-terminal-error.js";
 import { isDefaultAgentRuntimeId, normalizeOptionalAgentRuntimeId } from "./agent-runtime-id.js";
 import { externalCliDiscoveryForProviders } from "./auth-profiles/external-cli-discovery.js";
 import type { AuthProfileStore } from "./auth-profiles/types.js";
diff --git a/src/agents/model-fallback.test.ts b/src/agents/model-fallback.test.ts
index b9250a25b426..5d6dd54ad9d8 100644
--- a/src/agents/model-fallback.test.ts
+++ b/src/agents/model-fallback.test.ts
@@ -17,7 +17,7 @@ import { setCurrentPluginMetadataSnapshot } from "../plugins/current-plugin-meta
 import { clearCurrentPluginMetadataSnapshot } from "../plugins/current-plugin-metadata-state.js";
 import { loadPluginMetadataSnapshot } from "../plugins/plugin-metadata-snapshot.js";
 import { GatewayDrainingError } from "../process/gateway-work-admission.js";
-import { AgentRunTerminalOutcomeError } from "./agent-run-terminal-outcome.js";
+import { AgentRunTerminalOutcomeError } from "./agent-run-terminal-error.js";
 import { AUTH_STORE_VERSION } from "./auth-profiles/constants.js";
 import type { AuthProfileStore } from "./auth-profiles/types.js";
 import { testing as cliBackendsTesting } from "./cli-backends.test-support.js";
diff --git a/src/agents/session-activity-notes.test.ts b/src/agents/session-activity-notes.test.ts
index 472cd70964ea..edec5532a52e 100644
--- a/src/agents/session-activity-notes.test.ts
+++ b/src/agents/session-activity-notes.test.ts
@@ -60,4 +60,17 @@ describe("session activity assistant buffering", () => {
     expect(state.assistantBuffer.endsWith("tail")).toBe(true);
     expect(state.assistantBufferDirty).toBe(false);
   });
+
+  it("does not report a signal-only aborted lifecycle end as done", () => {
+    const state = createSessionActivityNoteState();
+    noteSessionActivityEvent(state, {
+      runId: "run-aborted",
+      seq: 1,
+      stream: "lifecycle",
+      ts: 1_000,
+      data: { phase: "end", aborted: true },
+    });
+
+    expect(state.notes.at(-1)?.text).toBe("Run failed");
+  });
 });
diff --git a/src/agents/session-activity-notes.ts b/src/agents/session-activity-notes.ts
index ec63ba3c29f2..d97a123884e6 100644
--- a/src/agents/session-activity-notes.ts
+++ b/src/agents/session-activity-notes.ts
@@ -4,7 +4,10 @@ import { HEARTBEAT_TOKEN } from "../auto-reply/tokens.js";
 import { normalizeAgentPlanSteps } from "../channels/streaming.js";
 import type { AgentEventPayload } from "../infra/agent-events.js";
 import { redactToolPayloadText } from "../logging/redact.js";
-import { buildAgentRunTerminalOutcome } from "./agent-run-terminal-outcome.js";
+import {
+  buildAgentRunTerminalOutcomeFromLifecycleEvent,
+  classifyAgentRunTerminalOutcome,
+} from "./agent-run-terminal-outcome.js";
 import {
   INTERNAL_RUNTIME_CONTEXT_BEGIN,
   INTERNAL_RUNTIME_CONTEXT_END,
@@ -329,15 +332,9 @@ export function readFiniteNumber(value: unknown): number | undefined {
 
 export function terminalHealthFor(event: AgentEventPayload): "done" | "failed" {
   const phase = event.data.phase;
-  const outcome = buildAgentRunTerminalOutcome({
-    status: phase === "end" ? "ok" : "error",
-    error: event.data.error,
-    stopReason: event.data.stopReason,
-    livenessState: event.data.livenessState,
-    timeoutPhase: event.data.timeoutPhase,
-    providerStarted: event.data.providerStarted,
-    startedAt: event.data.startedAt,
-    endedAt: event.data.endedAt,
+  const outcome = buildAgentRunTerminalOutcomeFromLifecycleEvent({
+    phase: phase === "end" ? "end" : "error",
+    data: event.data,
   });
-  return outcome.reason === "completed" ? "done" : "failed";
+  return classifyAgentRunTerminalOutcome(outcome) === "success" ? "done" : "failed";
 }
diff --git a/src/audit/agent-event-audit.ts b/src/audit/agent-event-audit.ts
index b91e3e2fd540..6722446f6234 100644
--- a/src/audit/agent-event-audit.ts
+++ b/src/audit/agent-event-audit.ts
@@ -4,11 +4,11 @@ import { asDateTimestampMs } from "@openclaw/normalization-core/number-coercion"
 import { normalizeOptionalLowercaseString } from "@openclaw/normalization-core/string-coerce";
 import {
   AGENT_RUN_TERMINAL_RETRY_GRACE_MS,
-  buildAgentRunTerminalOutcome,
+  buildAgentRunTerminalOutcomeFromLifecycleEvent,
+  classifyAgentRunTerminalOutcome,
   mergeAgentRunTerminalOutcome,
   type AgentRunTerminalOutcome,
 } from "../agents/agent-run-terminal-outcome.js";
-import { normalizeAgentRunTimeoutPhase } from "../agents/run-timeout-attribution.js";
 import { isAllowedToolCallName } from "../agents/tool-call-shared.js";
 import type { AgentEventPayload } from "../infra/agent-events.js";
 import type { TrustedToolExecutionEvent } from "../infra/diagnostic-events.js";
@@ -122,57 +122,25 @@ function resolveToolProvenance(
   };
 }
 
+const AUDIT_TERMINAL_BY_CLASSIFICATION = {
+  success: { status: "succeeded" as const },
+  timeout: { status: "timed_out" as const, errorCode: "run_timed_out" as const },
+  cancellation: { status: "cancelled" as const, errorCode: "run_cancelled" as const },
+  failure: { status: "failed" as const, errorCode: "run_failed" as const },
+};
+
 function classifyRunTerminal(
   data: Record<string, unknown>,
   phase: "end" | "error",
 ): {
   outcome: AgentRunTerminalOutcome;
 } & AgentRunFinishedAuditTerminal {
-  const stopReason = nonEmptyString(data.stopReason);
-  const timeoutPhase = normalizeAgentRunTimeoutPhase(data.timeoutPhase);
-  const terminalStatus = normalizeOptionalLowercaseString(data.status);
-  const explicitlyTimedOut =
-    stopReason === "timeout" ||
-    timeoutPhase !== undefined ||
-    terminalStatus === "timeout" ||
-    terminalStatus === "timed_out";
-  const explicitlyCancelled =
-    !explicitlyTimedOut &&
-    (data.aborted === true ||
-      stopReason === "aborted" ||
-      terminalStatus === "cancelled" ||
-      terminalStatus === "canceled" ||
-      terminalStatus === "aborted");
-  // The terminal helper accepts wait statuses, so normalize explicit lifecycle
-  // cancellation to its canonical stop signal without persisting the raw reason.
-  const outcomeStopReason = explicitlyCancelled && !explicitlyTimedOut ? "stop" : stopReason;
-  const outcome = buildAgentRunTerminalOutcome({
-    status: explicitlyTimedOut
-      ? "timeout"
-      : phase === "error"
-        ? "error"
-        : explicitlyCancelled
-          ? "error"
-          : "ok",
-    stopReason: outcomeStopReason,
-    livenessState: data.livenessState,
-    timeoutPhase,
-    providerStarted: data.providerStarted,
-    startedAt: data.startedAt,
-    endedAt: data.endedAt,
-  });
-  if (outcome.reason === "cancelled" || outcome.reason === "aborted") {
-    return { outcome, status: "cancelled", errorCode: "run_cancelled" };
-  }
-  if (outcome.reason === "hard_timeout" || outcome.reason === "timed_out") {
-    return { outcome, status: "timed_out", errorCode: "run_timed_out" };
-  }
+  const outcome = buildAgentRunTerminalOutcomeFromLifecycleEvent({ phase, data });
   if (outcome.reason === "blocked") {
     return { outcome, status: "blocked", errorCode: "run_blocked" };
   }
-  return outcome.reason === "completed"
-    ? { outcome, status: "succeeded" }
-    : { outcome, status: "failed", errorCode: "run_failed" };
+  const terminal = AUDIT_TERMINAL_BY_CLASSIFICATION[classifyAgentRunTerminalOutcome(outcome)];
+  return { outcome, ...terminal };
 }
 
 type AgentAuditProjection = {
diff --git a/src/commands/agent-exec.test.ts b/src/commands/agent-exec.test.ts
index ee0b94316ca6..a7d932f5ec99 100644
--- a/src/commands/agent-exec.test.ts
+++ b/src/commands/agent-exec.test.ts
@@ -5,7 +5,7 @@ import path from "node:path";
 import { Readable } from "node:stream";
 import { promisify } from "node:util";
 import { afterEach, describe, expect, it, vi } from "vitest";
-import { AgentRunTerminalOutcomeError } from "../agents/agent-run-terminal-outcome.js";
+import { AgentRunTerminalOutcomeError } from "../agents/agent-run-terminal-error.js";
 import {
   ensureAuthProfileStore,
   findPersistedAuthProfileCredential,
diff --git a/src/commands/agent-exec.ts b/src/commands/agent-exec.ts
index 328ebe6b1d2a..47d32e48140b 100644
--- a/src/commands/agent-exec.ts
+++ b/src/commands/agent-exec.ts
@@ -5,7 +5,7 @@ import os from "node:os";
 import path from "node:path";
 import { TextDecoder } from "node:util";
 import { readByteStreamWithLimit } from "@openclaw/media-core/read-byte-stream-with-limit";
-import { findAgentRunTerminalOutcome } from "../agents/agent-run-terminal-outcome.js";
+import { findAgentRunTerminalOutcome } from "../agents/agent-run-terminal-error.js";
 import type { EmbeddedAgentRunMeta } from "../agents/embedded-agent.js";
 import type { OpenClawConfig } from "../config/types.openclaw.js";
 import { mergeDeep } from "../infra/deep-merge.js";
diff --git a/src/gateway/server-chat.ts b/src/gateway/server-chat.ts
index 9d3166ed8e7e..f7301636c4b1 100644
--- a/src/gateway/server-chat.ts
+++ b/src/gateway/server-chat.ts
@@ -6,7 +6,10 @@ import type {
   ChatRunStartupPhase,
 } from "../../packages/gateway-protocol/src/schema/logs-chat.js";
 import { isAgentLifecycleYieldedWaiting } from "../agents/agent-lifecycle-parent-state.js";
-import { buildAgentRunTerminalOutcome } from "../agents/agent-run-terminal-outcome.js";
+import {
+  buildAgentRunTerminalOutcomeFromLifecycleEvent,
+  classifyAgentRunTerminalOutcome,
+} from "../agents/agent-run-terminal-outcome.js";
 import { resolveDefaultAgentId } from "../agents/agent-scope.js";
 import { isTimeoutError, resolveFailoverReasonFromError } from "../agents/failover-error.js";
 import { resolveToolSearchCodeDisplayTarget } from "../agents/tool-display-common.js";
@@ -79,6 +82,13 @@ export type {
   ToolEventRecipientRegistry,
 } from "./server-chat-state.js";
 
+const CHAT_STATE_BY_TERMINAL_CLASSIFICATION = {
+  success: "done",
+  timeout: "error",
+  cancellation: "aborted",
+  failure: "error",
+} as const;
+
 function readChatRunStartupPhase(value: unknown): ChatRunStartupPhase | undefined {
   switch (value) {
     case "preparing_workspace":
@@ -725,8 +735,6 @@ export function createAgentEventHandler({
         (deliverySessionKey ? sessionMessageSubscribers.get(deliverySessionKey).size > 0 : false))
     ) {
       if (!isAborted) {
-        const evtStopReason =
-          typeof evt.data?.stopReason === "string" ? evt.data.stopReason : undefined;
         const finished = chatLink ? chatRunState.registry.shift(evt.runId) : undefined;
         if (chatLink && !finished) {
           clearRunContextForEvent(evt);
@@ -736,35 +744,23 @@ export function createAgentEventHandler({
         const terminalSessionKey = finished?.sessionKey ?? sessionKey;
         const terminalRunId = finished?.clientRunId ?? eventRunId;
         const terminalAgentId = finished?.agentId ?? sessionAgentId;
-        // Some local lifecycle sources only carry the aborted flag. Preserve
-        // that terminal state instead of misclassifying the run as a timeout.
-        const terminalStopReason = evtStopReason ?? (lifecycleAborted ? "aborted" : undefined);
+        const terminalOutcome = buildAgentRunTerminalOutcomeFromLifecycleEvent({
+          phase: lifecyclePhase,
+          data: evt.data,
+          endedAt: evt.data?.endedAt ?? evt.ts,
+        });
         const yieldedWaiting = isAgentLifecycleYieldedWaiting({
           phase: lifecyclePhase,
           yielded: evt.data?.yielded,
           livenessState: evt.data?.livenessState,
-          stopReason: terminalStopReason,
+          stopReason: terminalOutcome.stopReason,
           aborted: lifecycleAborted,
           status: evt.data?.status,
           timeoutPhase: evt.data?.timeoutPhase,
           error: evt.data?.error,
         });
-        const terminalOutcome = buildAgentRunTerminalOutcome({
-          status: lifecyclePhase === "error" ? "error" : lifecycleAborted ? "timeout" : "ok",
-          error: evt.data?.error,
-          stopReason: terminalStopReason,
-          livenessState: evt.data?.livenessState,
-          timeoutPhase: evt.data?.timeoutPhase,
-          providerStarted: evt.data?.providerStarted,
-          startedAt: evt.data?.startedAt,
-          endedAt: evt.data?.endedAt ?? evt.ts,
-        });
         const terminalState =
-          terminalOutcome.reason === "completed"
-            ? "done"
-            : terminalOutcome.reason === "cancelled" || terminalOutcome.reason === "aborted"
-              ? "aborted"
-              : "error";
+          CHAT_STATE_BY_TERMINAL_CLASSIFICATION[classifyAgentRunTerminalOutcome(terminalOutcome)];
         if (!(opts?.skipChatErrorFinal && terminalState === "error")) {
           emitChatTerminal(
             terminalSessionKey,
diff --git a/src/gateway/server-methods/agent-job.ts b/src/gateway/server-methods/agent-job.ts
index 133e17b847fe..0a4b52fb9545 100644
--- a/src/gateway/server-methods/agent-job.ts
+++ b/src/gateway/server-methods/agent-job.ts
@@ -5,6 +5,7 @@ import { asOptionalRecord } from "@openclaw/normalization-core/record-coerce";
 import {
   AGENT_RUN_TERMINAL_RETRY_GRACE_MS,
   buildAgentRunTerminalOutcome,
+  buildAgentRunTerminalOutcomeFromLifecycleEvent,
   isStickyAgentRunTerminalOutcome,
   mergeAgentRunTerminalOutcome,
   type AgentRunTerminalOutcome,
@@ -269,29 +270,26 @@ function createSnapshotFromLifecycleEvent(params: {
   const startedAt =
     typeof data?.startedAt === "number" ? data.startedAt : agentRunStarts.get(runId);
   const endedAt = typeof data?.endedAt === "number" ? data.endedAt : undefined;
-  const error = typeof data?.error === "string" ? data.error : undefined;
-  const stopReason = typeof data?.stopReason === "string" ? data.stopReason : undefined;
-  const livenessState = typeof data?.livenessState === "string" ? data.livenessState : undefined;
-  const terminalOutcome = buildAgentRunTerminalOutcome({
-    status: phase === "error" ? "error" : data?.aborted ? "timeout" : "ok",
-    error,
-    stopReason,
-    livenessState,
-    timeoutPhase: data?.timeoutPhase,
-    providerStarted: data?.providerStarted,
+  const terminalOutcome = buildAgentRunTerminalOutcomeFromLifecycleEvent({
+    phase,
+    data,
     startedAt,
     endedAt,
   });
+  // agent.wait historically treats a bare abort flag as a retryable timeout.
+  // Modern explicit stop reasons keep the canonical cancellation projection.
+  const legacyBareAbort =
+    terminalOutcome.reason === "aborted" && data?.stopReason == null && data?.status == null;
   return {
     runId,
     source: "lifecycle",
     recordedAt: Date.now(),
-    status: terminalOutcome.status,
+    status: legacyBareAbort ? "timeout" : terminalOutcome.status,
     startedAt,
     endedAt,
-    error: terminalOutcome.error,
-    stopReason,
-    livenessState,
+    error: legacyBareAbort ? undefined : terminalOutcome.error,
+    stopReason: legacyBareAbort ? undefined : terminalOutcome.stopReason,
+    livenessState: terminalOutcome.livenessState,
     ...(data?.yielded === true ? { yielded: true } : {}),
     ...(terminalOutcome.timeoutPhase ? { timeoutPhase: terminalOutcome.timeoutPhase } : {}),
     ...(terminalOutcome.providerStarted !== undefined
diff --git a/src/gateway/server-methods/agent-run-dispatch.ts b/src/gateway/server-methods/agent-run-dispatch.ts
index ba749de9e0a0..5ebe0ea17db0 100644
--- a/src/gateway/server-methods/agent-run-dispatch.ts
+++ b/src/gateway/server-methods/agent-run-dispatch.ts
@@ -1,8 +1,10 @@
 import { ErrorCodes, errorShape } from "../../../packages/gateway-protocol/src/index.js";
 import {
   buildAgentRunTerminalOutcome,
+  classifyAgentRunTerminalOutcome,
   type AgentRunTerminalOutcome,
 } from "../../agents/agent-run-terminal-outcome.js";
+import { isTimeoutError } from "../../agents/failover-error.js";
 import type { MainSessionRecoveryPendingTarget } from "../../agents/main-session-recovery-store.js";
 import { isAgentRunRestartAbortReason } from "../../agents/run-termination.js";
 import { normalizeAgentRunTimeoutPhase } from "../../agents/run-timeout-attribution.js";
@@ -12,12 +14,12 @@ import { clearAgentRunContext } from "../../infra/agent-run-registry.js";
 import { readErrorName } from "../../infra/errors.js";
 import { defaultRuntime } from "../../runtime.js";
 import { createRunningTaskRun } from "../../tasks/detached-task-runtime.js";
+import { mapAgentRunTerminalOutcomeToTaskStatus } from "../../tasks/task-registry-common.js";
 import { normalizeDeliveryContext } from "../../utils/delivery-context.shared.js";
 import type { ChatAbortControllerEntry } from "../chat-abort.js";
 import { formatForLog } from "../ws-log.js";
 import { setGatewayDedupeEntries } from "./agent-dedupe.js";
 import {
-  resolveFailedTrackedAgentTaskStatus,
   tryFinalizeTrackedAgentTask,
   type GatewayAgentTaskTrackingMode,
 } from "./agent-task-tracking.js";
@@ -67,8 +69,19 @@ function resolveGatewayAgentAbortStopReason(signal: AbortSignal): "restart" | "r
   return readErrorName(signal.reason) === "TimeoutError" ? "timeout" : "rpc";
 }
 
-function resolveAbortedAgentTaskStatus(stopReason: string | undefined): "cancelled" | "timed_out" {
-  return stopReason === "timeout" ? "timed_out" : "cancelled";
+// `agent` clients already consume cancellation as timeout; keep that wire
+// contract while task/session projections use the canonical cancellation class.
+const RESOLVED_GATEWAY_STATUS_BY_TERMINAL_CLASSIFICATION = {
+  success: "ok",
+  timeout: "timeout",
+  cancellation: "timeout",
+  failure: "error",
+} as const;
+
+function projectRejectedGatewayStatus(outcome: AgentRunTerminalOutcome): "error" | "timeout" {
+  // The shipped wire keeps raw provider/AbortError rejections as errors. Only
+  // signal-owned cancellation/timeout metadata promotes a rejection to timeout.
+  return outcome.reason === "cancelled" || outcome.stopReason === "timeout" ? "timeout" : "error";
 }
 
 export function resolveAbortedAgentStopReason(entry?: ChatAbortControllerEntry): string {
@@ -176,17 +189,14 @@ export function dispatchAgentRunFromGateway(params: {
         timeoutPhase,
         providerStarted: result?.meta?.providerStarted,
       });
-      const responseStatus = aborted ? "timeout" : terminalOutcome.status;
+      const responseStatus =
+        RESOLVED_GATEWAY_STATUS_BY_TERMINAL_CLASSIFICATION[
+          classifyAgentRunTerminalOutcome(terminalOutcome)
+        ];
       if (taskTracked) {
         tryFinalizeTrackedAgentTask({
           runId: params.runId,
-          status: aborted
-            ? resolveAbortedAgentTaskStatus(stopReason)
-            : responseStatus === "timeout"
-              ? "timed_out"
-              : responseStatus === "error"
-                ? "failed"
-                : "succeeded",
+          status: mapAgentRunTerminalOutcomeToTaskStatus(terminalOutcome),
           terminalSummary:
             responseStatus === "timeout"
               ? "aborted"
@@ -250,19 +260,20 @@ export function dispatchAgentRunFromGateway(params: {
       const renderedErr = formatForLog(err);
       const stopReason = aborted
         ? resolveGatewayAgentAbortStopReason(params.abortController.signal)
-        : undefined;
+        : isAbortError(err)
+          ? "aborted"
+          : undefined;
       const terminalOutcome = buildAgentRunTerminalOutcome({
-        status: aborted ? "timeout" : "error",
+        status: aborted || isTimeoutError(err) ? "timeout" : "error",
         error: renderedErr,
         stopReason,
         timeoutPhase: stopReason === "restart" ? "gateway_draining" : undefined,
       });
+      const responseStatus = projectRejectedGatewayStatus(terminalOutcome);
       if (taskTracked) {
         tryFinalizeTrackedAgentTask({
           runId: params.runId,
-          status: aborted
-            ? resolveAbortedAgentTaskStatus(stopReason)
-            : resolveFailedTrackedAgentTaskStatus(err),
+          status: mapAgentRunTerminalOutcomeToTaskStatus(terminalOutcome),
           error: renderedErr,
           terminalSummary: renderedErr,
           log: params.context.logGateway,
@@ -271,7 +282,7 @@ export function dispatchAgentRunFromGateway(params: {
       const error = errorShape(ErrorCodes.UNAVAILABLE, renderedErr);
       const payload = {
         runId: params.runId,
-        status: aborted ? ("timeout" as const) : ("error" as const),
+        status: responseStatus,
         summary: aborted ? "aborted" : renderedErr,
         ...(aborted
           ? {
diff --git a/src/gateway/server-methods/agent-task-tracking.ts b/src/gateway/server-methods/agent-task-tracking.ts
index e6d0cd455ccb..302963f0cbf0 100644
--- a/src/gateway/server-methods/agent-task-tracking.ts
+++ b/src/gateway/server-methods/agent-task-tracking.ts
@@ -4,10 +4,8 @@ import {
   GATEWAY_CLIENT_NAMES,
 } from "../../../packages/gateway-protocol/src/client-info.js";
 import { readAcpSessionMeta } from "../../acp/runtime/session-meta.js";
-import { isTimeoutError } from "../../agents/failover-error.js";
 import { resolveAgentIdFromSessionKey, resolveAgentMainSessionKey } from "../../config/sessions.js";
 import type { OpenClawConfig } from "../../config/types.openclaw.js";
-import { isAbortError } from "../../infra/abort-signal.js";
 import type { PluginSubagentRequesterContext } from "../../plugins/runtime/subagent-requester-context.js";
 import { isAcpSessionKey } from "../../routing/session-key.js";
 import type { InputProvenance } from "../../sessions/input-provenance.js";
@@ -186,12 +184,6 @@ export async function registerPluginSubagentRunFromGateway(params: {
   });
 }
 
-export function resolveFailedTrackedAgentTaskStatus(
-  error: unknown,
-): GatewayAgentTaskTerminalStatus {
-  return isAbortError(error) || isTimeoutError(error) ? "timed_out" : "failed";
-}
-
 export function tryFinalizeTrackedAgentTask(params: {
   runId: string;
   status: GatewayAgentTaskTerminalStatus;
diff --git a/src/gateway/server-methods/agent.sessions-and-models.test-utils.ts b/src/gateway/server-methods/agent.sessions-and-models.test-utils.ts
index 8a06c9323a83..29df51f74668 100644
--- a/src/gateway/server-methods/agent.sessions-and-models.test-utils.ts
+++ b/src/gateway/server-methods/agent.sessions-and-models.test-utils.ts
@@ -824,6 +824,43 @@ describe("gateway agent handler", () => {
     });
   });
 
+  it("classifies an unsignaled AbortError task as cancelled without changing the error wire", async () => {
+    await withTempDir({ prefix: "openclaw-gateway-agent-task-plain-abort-" }, async (root) => {
+      useTestStateDir(root);
+      resetAgentTaskRegistryForTests();
+      primeMainAgentRun();
+      const abortError = new Error("This operation was aborted");
+      abortError.name = "AbortError";
+      const context = makeContext();
+      const runId = "task-registry-agent-run-plain-abort";
+      mocks.agentCommand.mockRejectedValueOnce(abortError);
+
+      await invokeAgent(
+        {
+          message: "background cli task",
+          sessionKey: "agent:main:main",
+          idempotencyKey: runId,
+        },
+        { context, reqId: runId },
+      );
+
+      await waitForAssertion(() => {
+        expectRecordFields(findTaskByRunId(runId), {
+          runtime: "cli",
+          childSessionKey: "agent:main:main",
+          status: "cancelled",
+          error: "AbortError: This operation was aborted",
+        });
+        expectRecordFields(context.dedupe.get(`agent:${runId}`)?.payload, {
+          runId,
+          status: "error",
+          summary: "AbortError: This operation was aborted",
+        });
+        expect(context.dedupe.get(`agent:${runId}`)?.ok).toBe(false);
+      });
+    });
+  });
+
   it("preserves restart ownership for aborted async gateway agent rejections", async () => {
     await withTempDir({ prefix: "openclaw-gateway-agent-task-restart-abort-" }, async (root) => {
       useTestStateDir(root);
diff --git a/src/gateway/session-lifecycle-state.test.ts b/src/gateway/session-lifecycle-state.test.ts
index cbcf7d68b8d2..adbbea6f964c 100644
--- a/src/gateway/session-lifecycle-state.test.ts
+++ b/src/gateway/session-lifecycle-state.test.ts
@@ -198,10 +198,10 @@ describe("session lifecycle state", () => {
       abortedLastRun: true,
     },
     {
-      name: "timeout",
+      name: "signal-only cancellation",
       data: { phase: "end", endedAt: 1_800, aborted: true },
-      status: "timeout",
-      abortedLastRun: false,
+      status: "killed",
+      abortedLastRun: true,
     },
     {
       name: "provider timeout",
@@ -244,7 +244,7 @@ describe("session lifecycle state", () => {
         livenessState: "paused",
         stopReason: "end_turn",
       },
-      status: "timeout",
+      status: "failed",
       abortedLastRun: false,
     },
   ] as const)("persists $name terminal state", async ({ data, status, abortedLastRun }) => {
diff --git a/src/gateway/session-lifecycle-state.ts b/src/gateway/session-lifecycle-state.ts
index 92b1a50611c2..bd15445a2b39 100644
--- a/src/gateway/session-lifecycle-state.ts
+++ b/src/gateway/session-lifecycle-state.ts
@@ -3,7 +3,8 @@
 import { truncateUtf16Safe } from "@openclaw/normalization-core/utf16-slice";
 import { isAgentLifecycleYieldedWaiting } from "../agents/agent-lifecycle-parent-state.js";
 import {
-  buildAgentRunTerminalOutcome,
+  buildAgentRunTerminalOutcomeFromLifecycleEvent,
+  classifyAgentRunTerminalOutcome,
   type AgentRunTerminalOutcome,
 } from "../agents/agent-run-terminal-outcome.js";
 import { sanitizeUserFacingText } from "../agents/embedded-agent-helpers/sanitize-user-facing-text.js";
@@ -69,37 +70,18 @@ function resolveLifecyclePhase(event: Pick<LifecycleEventLike, "data">): Lifecyc
   return phase === "start" || phase === "end" || phase === "error" ? phase : null;
 }
 
-function mapAgentRunTerminalOutcomeToSessionStatus(
-  outcome: AgentRunTerminalOutcome,
-): SessionRunStatus {
-  switch (outcome.reason) {
-    case "completed":
-      return "done";
-    case "hard_timeout":
-    case "timed_out":
-      return "timeout";
-    case "cancelled":
-    case "aborted":
-      return "killed";
-    case "blocked":
-    case "abandoned":
-    case "failed":
-      return "failed";
-    default:
-      return outcome.reason satisfies never;
-  }
-}
+const SESSION_STATUS_BY_TERMINAL_CLASSIFICATION = {
+  success: "done",
+  timeout: "timeout",
+  cancellation: "killed",
+  failure: "failed",
+} as const satisfies Record<ReturnType<typeof classifyAgentRunTerminalOutcome>, SessionRunStatus>;
 
 function resolveTerminalOutcome(event: LifecycleEventLike): AgentRunTerminalOutcome {
   const phase = resolveLifecyclePhase(event);
-  return buildAgentRunTerminalOutcome({
-    status: phase === "error" ? "error" : event.data?.aborted === true ? "timeout" : "ok",
-    error: event.data?.error,
-    stopReason: event.data?.stopReason,
-    livenessState: event.data?.livenessState,
-    timeoutPhase: event.data?.timeoutPhase,
-    providerStarted: event.data?.providerStarted,
-    startedAt: event.data?.startedAt,
+  return buildAgentRunTerminalOutcomeFromLifecycleEvent({
+    phase: phase === "error" ? "error" : "end",
+    data: event.data,
     endedAt: event.data?.endedAt ?? event.ts,
   });
 }
@@ -196,7 +178,9 @@ function deriveGatewaySessionLifecycleSnapshot(params: {
     error: params.event.data?.error,
   });
   const terminal = yieldedWaiting ? undefined : resolveTerminalOutcome(params.event);
-  const status = terminal ? mapAgentRunTerminalOutcomeToSessionStatus(terminal) : "running";
+  const status = terminal
+    ? SESSION_STATUS_BY_TERMINAL_CLASSIFICATION[classifyAgentRunTerminalOutcome(terminal)]
+    : "running";
   return {
     updatedAt,
     status,
diff --git a/src/tasks/task-registry-common.ts b/src/tasks/task-registry-common.ts
index 4cf1b952c6de..714ce492ad5c 100644
--- a/src/tasks/task-registry-common.ts
+++ b/src/tasks/task-registry-common.ts
@@ -1,6 +1,6 @@
 import { normalizeOptionalString } from "@openclaw/normalization-core/string-coerce";
 import {
-  buildAgentRunTerminalOutcome,
+  classifyAgentRunTerminalOutcome,
   type AgentRunTerminalOutcome,
 } from "../agents/agent-run-terminal-outcome.js";
 import { SUBAGENT_KILL_TASK_ERROR } from "./detached-task-runtime-contract.js";
@@ -265,25 +265,17 @@ export function resolveTaskTerminalOutcome(params: {
   return params.status === "succeeded" ? "succeeded" : undefined;
 }
 
+const TASK_STATUS_BY_TERMINAL_CLASSIFICATION = {
+  success: "succeeded",
+  timeout: "timed_out",
+  cancellation: "cancelled",
+  failure: "failed",
+} as const;
+
 export function mapAgentRunTerminalOutcomeToTaskStatus(
   outcome: AgentRunTerminalOutcome,
 ): Extract<TaskStatus, "succeeded" | "failed" | "timed_out" | "cancelled"> {
-  switch (outcome.reason) {
-    case "completed":
-      return "succeeded";
-    case "hard_timeout":
-    case "timed_out":
-      return "timed_out";
-    case "cancelled":
-    case "aborted":
-      return "cancelled";
-    case "blocked":
-    case "abandoned":
-    case "failed":
-      return "failed";
-    default:
-      return outcome.reason satisfies never;
-  }
+  return TASK_STATUS_BY_TERMINAL_CLASSIFICATION[classifyAgentRunTerminalOutcome(outcome)];
 }
 
 export function resolveTaskLifecycleTerminalError(params: {
@@ -298,28 +290,6 @@ export function resolveTaskLifecycleTerminalError(params: {
     : params.error;
 }
 
-export function buildTaskLifecycleTerminalOutcome(params: {
-  phase: "end" | "error";
-  data?: Record<string, unknown>;
-  startedAt?: number;
-  endedAt?: number;
-}): AgentRunTerminalOutcome {
-  const status =
-    params.phase === "error" ? "error" : params.data?.aborted === true ? "timeout" : "ok";
-  // Lifecycle events carry runner/provider terminal facts. Keep the precedence
-  // centralized so task projections match agent.wait and gateway snapshots.
-  return buildAgentRunTerminalOutcome({
-    status,
-    error: params.data?.error,
-    stopReason: params.data?.stopReason,
-    livenessState: params.data?.livenessState,
-    timeoutPhase: params.data?.timeoutPhase,
-    providerStarted: params.data?.providerStarted,
-    startedAt: params.startedAt,
-    endedAt: params.endedAt,
-  });
-}
-
 export function appendTaskEvent(event: {
   at: number;
   kind: TaskEventKind;
diff --git a/src/tasks/task-registry-lifecycle.ts b/src/tasks/task-registry-lifecycle.ts
index 265db13cc31c..13b2274764a0 100644
--- a/src/tasks/task-registry-lifecycle.ts
+++ b/src/tasks/task-registry-lifecycle.ts
@@ -1,8 +1,8 @@
+import { buildAgentRunTerminalOutcomeFromLifecycleEvent } from "../agents/agent-run-terminal-outcome.js";
 import { onAgentEvent } from "../infra/agent-events.js";
 import { isTerminalTaskStatus } from "./task-executor-policy.js";
 import {
   appendTaskEvent,
-  buildTaskLifecycleTerminalOutcome,
   mapAgentRunTerminalOutcomeToTaskStatus,
   resolveTaskLifecycleTerminalError,
 } from "./task-registry-common.js";
@@ -55,7 +55,7 @@ function ensureListener() {
         if (phase === "start") {
           patch.status = "running";
         } else if (phase === "end") {
-          const terminal = buildTaskLifecycleTerminalOutcome({
+          const terminal = buildAgentRunTerminalOutcomeFromLifecycleEvent({
             phase,
             data: evt.data,
             startedAt,
@@ -72,7 +72,7 @@ function ensureListener() {
             patch.error = error;
           }
         } else if (phase === "error") {
-          const terminal = buildTaskLifecycleTerminalOutcome({
+          const terminal = buildAgentRunTerminalOutcomeFromLifecycleEvent({
             phase,
             data: evt.data,
             startedAt,
diff --git a/src/tasks/task-registry.test.ts b/src/tasks/task-registry.test.ts
index de69120ef084..c326f3826a45 100644
--- a/src/tasks/task-registry.test.ts
+++ b/src/tasks/task-registry.test.ts
@@ -959,7 +959,7 @@ describe("task-registry", () => {
     });
   });
 
-  it("keeps stronger run-scoped terminal states when a late success arrives", async () => {
+  it("keeps signal-only cancellation when a late success arrives", async () => {
     await withTaskRegistryTempDir(async () => {
       resetTaskRegistryMemoryForTest();
 
@@ -988,7 +988,7 @@ describe("task-registry", () => {
       });
 
       expectRecordFields(requireTaskByRunId("run-timeout-then-success"), {
-        status: "timed_out",
+        status: "cancelled",
         endedAt: 200,
       });
     });
diff --git a/src/tui/embedded-backend.test.ts b/src/tui/embedded-backend.test.ts
index 4fd9da3baa86..80787ecc443e 100644
--- a/src/tui/embedded-backend.test.ts
+++ b/src/tui/embedded-backend.test.ts
@@ -2289,8 +2289,7 @@ describe("EmbeddedTuiBackend", () => {
   });
 
   it("surfaces canonical error-only thrown outcomes without exposing the wrapped cause", async () => {
-    const { AgentRunTerminalOutcomeError } =
-      await import("../agents/agent-run-terminal-outcome.js");
+    const { AgentRunTerminalOutcomeError } = await import("../agents/agent-run-terminal-error.js");
     const secret = ["sk", "abcdefghijklmnopqrstuv"].join("-");
     agentCommandFromIngressMock.mockRejectedValueOnce(
       new AgentRunTerminalOutcomeError(new Error(`hidden provider credential ${secret}`), {
@@ -2325,8 +2324,7 @@ describe("EmbeddedTuiBackend", () => {
   });
 
   it("preserves a wrapped canonical cancellation without redundant abort metadata", async () => {
-    const { AgentRunTerminalOutcomeError } =
-      await import("../agents/agent-run-terminal-outcome.js");
+    const { AgentRunTerminalOutcomeError } = await import("../agents/agent-run-terminal-error.js");
     agentCommandFromIngressMock.mockRejectedValueOnce(
       new AgentRunTerminalOutcomeError(new Error("underlying cancellation"), {
         reason: "cancelled",
diff --git a/src/tui/embedded-backend.ts b/src/tui/embedded-backend.ts
index aac0536ec528..14826699978f 100644
--- a/src/tui/embedded-backend.ts
+++ b/src/tui/embedded-backend.ts
@@ -4,10 +4,12 @@ import type { SessionsPatchResult } from "../../packages/gateway-protocol/src/in
 import { CHAT_HISTORY_MAX_ENTRIES } from "../../packages/gateway-protocol/src/schema/chat-history-constants.js";
 import { agentCommandFromIngress } from "../agents/agent-command.js";
 import { isAgentLifecycleYieldedWaiting } from "../agents/agent-lifecycle-parent-state.js";
+import { findAgentRunTerminalOutcome } from "../agents/agent-run-terminal-error.js";
 import {
   AGENT_RUN_TERMINAL_RETRY_GRACE_MS,
-  buildAgentRunTerminalOutcome,
-  findAgentRunTerminalOutcome,
+  buildAgentRunTerminalOutcomeFromLifecycleEvent,
+  classifyAgentRunTerminalOutcome,
+  type AgentRunTerminalOutcome,
 } from "../agents/agent-run-terminal-outcome.js";
 import { listAgentEntries } from "../agents/agent-scope-config.js";
 import {
@@ -112,6 +114,13 @@ import type {
 } from "./tui-backend.js";
 import { formatTuiErrorMessage } from "./tui-formatters.js";
 
+const TUI_STATE_BY_TERMINAL_CLASSIFICATION = {
+  success: undefined,
+  timeout: "error",
+  cancellation: "aborted",
+  failure: "error",
+} as const;
+
 type LocalRunState = {
   sessionKey: string;
   agentId: string;
@@ -1176,46 +1185,36 @@ export class EmbeddedTuiBackend implements TuiBackend {
   private projectTerminalOutcome(
     runId: string,
     run: LocalRunState,
-    metadata: Partial<Parameters<typeof buildAgentRunTerminalOutcome>[0]> & {
+    metadata: NonNullable<
+      Parameters<typeof buildAgentRunTerminalOutcomeFromLifecycleEvent>[0]["data"]
+    > & {
       aborted?: unknown;
       phase?: unknown;
       toolErrorSummary?: unknown;
     },
     options: {
       visibleText?: string;
-      terminalOutcome?: ReturnType<typeof buildAgentRunTerminalOutcome>;
+      terminalOutcome?: AgentRunTerminalOutcome;
     } = {},
   ): boolean {
-    const aborted =
-      typeof metadata.aborted === "boolean" ? metadata.aborted : run.controller.signal.aborted;
-    const stopReason = metadata.stopReason ?? (aborted ? "aborted" : undefined);
     const terminalError =
       metadata.error && typeof metadata.error === "object" && "message" in metadata.error
         ? metadata.error.message
         : metadata.error;
     const outcome =
       options.terminalOutcome ??
-      buildAgentRunTerminalOutcome({
-        status:
-          stopReason === "timeout" || metadata.status === "timeout" || metadata.timeoutPhase
-            ? "timeout"
-            : aborted ||
-                metadata.error ||
-                metadata.phase === "error" ||
-                [metadata.status, stopReason].includes("error")
-              ? "error"
-              : "ok",
-        error: terminalError ? formatTuiErrorMessage(terminalError) : undefined,
-        stopReason,
-        livenessState: metadata.livenessState,
-        timeoutPhase: metadata.timeoutPhase,
-        providerStarted: metadata.providerStarted,
+      buildAgentRunTerminalOutcomeFromLifecycleEvent({
+        phase: metadata.phase === "error" || terminalError ? "error" : "end",
+        data: {
+          ...metadata,
+          error: terminalError ? formatTuiErrorMessage(terminalError) : undefined,
+        },
+        abortSignal: run.controller.signal,
       });
-    if (outcome.reason === "completed") {
+    const state = TUI_STATE_BY_TERMINAL_CLASSIFICATION[classifyAgentRunTerminalOutcome(outcome)];
+    if (!state) {
       return false;
     }
-    const state =
-      outcome.reason === "aborted" || outcome.reason === "cancelled" ? "aborted" : "error";
     const diagnostic =
       state === "aborted"
         ? readToolValidationErrorSummary(metadata.toolErrorSummary)