diff --git a/src/Backend/AutopilotMonitor.Functions.Tests/ScriptOutputReconciliationClassificationTests.cs b/src/Backend/AutopilotMonitor.Functions.Tests/ScriptOutputReconciliationClassificationTests.cs
new file mode 100644
index 00000000..bab8be70
--- /dev/null
+++ b/src/Backend/AutopilotMonitor.Functions.Tests/ScriptOutputReconciliationClassificationTests.cs
@@ -0,0 +1,52 @@
+using System;
+using System.Collections.Generic;
+using AutopilotMonitor.Functions.Services;
+using AutopilotMonitor.Shared;
+using AutopilotMonitor.Shared.Models;
+using Xunit;
+
+namespace AutopilotMonitor.Functions.Tests;
+
+/// <summary>
+/// D-316: the agent corrects an already reported platform run from IME's saved result with a
+/// script_output_reconciliation. It is observation of an earlier run: it never heals a Stalled session and never
+/// counts as another script run.
+/// </summary>
+public class ScriptOutputReconciliationClassificationTests
+{
+    private static readonly DateTime At = new(2026, 10, 3, 20, 59, 8, DateTimeKind.Utc);
+
+    [Fact]
+    public void A_correction_alone_is_no_real_activity_and_no_script_run()
+    {
+        var classification = EventIngestProcessor.ClassifyEvents(new List<EnrollmentEvent>
+        {
+            Event(Constants.EventTypes.ScriptOutputReconciliation, new Dictionary<string, object> { ["scriptType"] = "platform", ["runId"] = "run-1", ["outcome"] = "foreign" }),
+        });
+
+        Assert.False(classification.HasNonPeriodicRealEvent);
+        Assert.Equal(0, classification.PlatformScriptCount);
+    }
+
+    [Fact]
+    public void The_corrected_run_counts_once_as_a_platform_script()
+    {
+        var classification = EventIngestProcessor.ClassifyEvents(new List<EnrollmentEvent>
+        {
+            Event("script_failed", new Dictionary<string, object> { ["scriptType"] = "platform", ["runId"] = "run-1", ["exitCode"] = "1" }),
+            Event(Constants.EventTypes.ScriptOutputReconciliation, new Dictionary<string, object> { ["scriptType"] = "platform", ["runId"] = "run-1", ["outcome"] = "foreign" }),
+        });
+
+        Assert.True(classification.HasNonPeriodicRealEvent);
+        Assert.Equal(1, classification.PlatformScriptCount);
+    }
+
+    private static EnrollmentEvent Event(string eventType, Dictionary<string, object> data) => new()
+    {
+        EventId = Guid.NewGuid().ToString(),
+        Timestamp = At,
+        EventType = eventType,
+        Source = "RegistryScriptResult",
+        Data = data,
+    };
+}
diff --git a/src/Backend/AutopilotMonitor.Functions/Services/EventIngestProcessor.Classification.cs b/src/Backend/AutopilotMonitor.Functions/Services/EventIngestProcessor.Classification.cs
index 8fdd3e1a..b1ea6bf6 100644
--- a/src/Backend/AutopilotMonitor.Functions/Services/EventIngestProcessor.Classification.cs
+++ b/src/Backend/AutopilotMonitor.Functions/Services/EventIngestProcessor.Classification.cs
@@ -480,6 +480,9 @@ namespace AutopilotMonitor.Functions.Services
             // observation too — a device that slept through its stall must stay Stalled.
             "system_clock_changed" => true,
             "system_sleep_episode" => true,
+            // A platform run corrected after the fact from IME's saved result (D-316): registry
+            // observation of an earlier run, not progress — a stalled session stays Stalled.
+            Constants.EventTypes.ScriptOutputReconciliation => true,
             _ => false
         };
 
diff --git a/src/McpServer/autopilot-monitor-mcp/src/__tests__/script-output-correction.test.ts b/src/McpServer/autopilot-monitor-mcp/src/__tests__/script-output-correction.test.ts
new file mode 100644
index 00000000..a08a6361
--- /dev/null
+++ b/src/McpServer/autopilot-monitor-mcp/src/__tests__/script-output-correction.test.ts
@@ -0,0 +1,95 @@
+/**
+ * D-316: a platform run whose script_failed came from another script's end block is corrected by a later
+ * script_output_reconciliation (outcome "foreign", IME result Success). get_session_summary must not count the
+ * stored script_failed as an error, must not rank it as one and must not attach the foreign exit code's catalog
+ * text; the correction itself stays a Warning key event.
+ *
+ * Pure unit tests: fetch is stubbed and the registered tool handler is invoked directly.
+ */
+import { describe, it, expect, vi, afterEach } from 'vitest';
+import { McpServer } from '@modelcontextprotocol/server';
+import { registerTools } from '../tools.js';
+import { runWithCaller } from '../client.js';
+import { foreignSuccessRunIds, isCorrectedForeignFailure } from '../tools/shared.js';
+
+type ToolHandler = (args: Record<string, unknown>, extra: unknown) => Promise<{ content?: Array<{ type: string; text?: string }> }>;
+
+const SESSION = 'e259c121-1234-4abc-9def-0123456789ab';
+const GA = { token: 'ga', isGlobalAdmin: true };
+const extra = { signal: new AbortController().signal };
+
+function summaryHandler(): ToolHandler {
+  const server = new McpServer({ name: 'test', version: '0.0.0' });
+  registerTools(server, undefined, undefined, undefined, true, true, false);
+  const registry = (server as unknown as { _registeredTools: Record<string, { handler: ToolHandler }> })._registeredTools;
+  return registry['get_session_summary'].handler;
+}
+
+function stubBackend(events: unknown[]): void {
+  const body = {
+    success: true,
+    session: { sessionId: SESSION, tenantId: 't', status: 'Succeeded', startedAt: '2026-10-03T20:49:00Z' },
+    events,
+    results: [],
+    annotations: [],
+    count: events.length,
+  };
+  vi.stubGlobal('fetch', vi.fn(async () => ({ ok: true, status: 200, json: async () => body, text: async () => JSON.stringify(body) }) as unknown as Response));
+}
+
+afterEach(() => vi.unstubAllGlobals());
+
+const foreignFailure = {
+  timestamp: '2026-10-03T20:59:04Z',
+  eventType: 'script_failed',
+  severity: 'Error',
+  source: 'ImeLogTracker',
+  message: 'Platform script d94468af: Success (exit: 1)',
+  data: { scriptType: 'platform', result: 'Success', exitCode: '1', runId: 'run-1' },
+};
+
+const correction = (data: Record<string, unknown>) => ({
+  timestamp: '2026-10-03T20:59:08Z',
+  eventType: 'script_output_reconciliation',
+  severity: 'Warning',
+  source: 'RegistryScriptResult',
+  message: "Platform script d94468af: output corrected from IME's saved result",
+  data: { scriptType: 'platform', outcome: 'foreign', result: 'Success', runId: 'run-1', ...data },
+});
+
+async function summary(events: unknown[]): Promise<Record<string, any>> {
+  stubBackend(events);
+  const result = await runWithCaller(GA, () => summaryHandler()({ sessionId: SESSION }, extra));
+  return JSON.parse((result.content ?? []).map((c) => c.text ?? '').join(''));
+}
+
+describe('get_session_summary with a corrected platform run', () => {
+  it('does not count the foreign script_failed as an error and drops its exit-code text', async () => {
+    const body = await summary([foreignFailure, correction({})]);
+
+    expect(body.stats.errorCount).toBe(0);
+    expect(body.stats.warningCount).toBe(1);
+    const failed = body.keyEvents.find((e: { eventType: string }) => e.eventType === 'script_failed');
+    expect(failed.correctedByImeSavedResult).toBe(true);
+    expect(failed.errorCode).toBeUndefined();
+    expect(body.keyEvents.some((e: { eventType: string }) => e.eventType === 'script_output_reconciliation')).toBe(true);
+  });
+
+  it('keeps counting a failure IME itself reported, and an uncorrected one', async () => {
+    expect((await summary([foreignFailure, correction({ result: 'Failed' })])).stats.errorCount).toBe(1);
+    expect((await summary([foreignFailure, correction({ outcome: 'repaired' })])).stats.errorCount).toBe(1);
+    expect((await summary([foreignFailure, correction({ runId: 'another-run' })])).stats.errorCount).toBe(1);
+    expect((await summary([foreignFailure])).stats.errorCount).toBe(1);
+  });
+});
+
+describe('foreignSuccessRunIds / isCorrectedForeignFailure', () => {
+  it('names only foreign corrections whose IME result is Success, and only script_failed rows', () => {
+    const runs = foreignSuccessRunIds([correction({}), correction({ runId: 'r2', result: 'Failed' }), correction({ runId: 'r3', outcome: 'repaired' })]);
+    expect([...runs]).toEqual(['run-1']);
+    expect(isCorrectedForeignFailure('script_failed', { runId: 'run-1' }, runs)).toBe(true);
+    expect(isCorrectedForeignFailure('script_completed', { runId: 'run-1' }, runs)).toBe(false);
+    expect(isCorrectedForeignFailure('script_failed', { runId: 'r2' }, runs)).toBe(false);
+    expect(isCorrectedForeignFailure('script_failed', undefined, runs)).toBe(false);
+  });
+});
diff --git a/src/McpServer/autopilot-monitor-mcp/src/tools/sessions.ts b/src/McpServer/autopilot-monitor-mcp/src/tools/sessions.ts
index 9a87aeaa..49c886e0 100644
--- a/src/McpServer/autopilot-monitor-mcp/src/tools/sessions.ts
+++ b/src/McpServer/autopilot-monitor-mcp/src/tools/sessions.ts
@@ -2,7 +2,7 @@ import { McpServer } from '@modelcontextprotocol/server';
 import { z } from 'zod';
 import { ApiError, apiFetch, buildQuery, jsonBody, DEFAULT_FIRST_PAGE_SIZE, effectivePageSize, enforceDelegatedTenant, enforceDelegatedTenantForPage, followNextLink, pageSizeForCall, pickGlobalOrTenantPath, scanUntilMatch, scanWithTimeoutFallback } from '../client.js';
 import { withToolTelemetry } from '../telemetry.js';
-import { READ_ONLY, MAX_RESULT_SIZE_CHARS, LEAN_EVENT_FIELDS, LEAN_EVENT_OMISSION, leanFieldSelection, SUMMARY_EVENT_FIELDS, toolResultText, SessionIdSchema, isBenignHealthDetectionReport, tenantIdDescription, pageSizeDescription, CONTINUATION_DESCRIPTION, daysDescription } from './shared.js';
+import { READ_ONLY, MAX_RESULT_SIZE_CHARS, LEAN_EVENT_FIELDS, LEAN_EVENT_OMISSION, leanFieldSelection, SUMMARY_EVENT_FIELDS, toolResultText, SessionIdSchema, isBenignHealthDetectionReport, foreignSuccessRunIds, isCorrectedForeignFailure, tenantIdDescription, pageSizeDescription, CONTINUATION_DESCRIPTION, daysDescription } from './shared.js';
 import { toolError } from './error-handler.js';
 import { lookupErrorCode } from '../error-code-catalog.js';
 import { withEventTypeNote, assertKnownDevicePropertyKeys } from '../resource-catalog.js';
@@ -534,6 +534,8 @@ export function registerSessionTools(server: McpServer, ga: boolean, delegated:
         // Observation coverage: what the agent could and could not see, folded from the
         // health/lifecycle events that the triage timeline below ranks low or drops.
         const coverage = buildSessionCoverage(s, allEvents);
+        // Platform runs IME's saved result proved to carry another script's exit code (D-316).
+        const foreignRuns = foreignSuccessRunIds(allEvents);
 
         let errorCount = 0;
         let warningCount = 0;
@@ -545,7 +547,8 @@ export function registerSessionTools(server: McpServer, ga: boolean, delegated:
           const sev = String(e.severity ?? '');
           // A compliant health-script detection mis-stamped script_failed/Error is benign —
           // exclude it so a green session's errorCount isn't inflated by routine compliance reports.
-          const benign = isBenignHealthDetectionReport(String(e.eventType ?? ''), e.data);
+          const benign = isBenignHealthDetectionReport(String(e.eventType ?? ''), e.data)
+            || isCorrectedForeignFailure(String(e.eventType ?? ''), e.data, foreignRuns);
           if (!benign && (sev === 'Error' || sev === 'Critical')) errorCount++;
           if (sev === 'Warning') warningCount++;
           const et = String(e.eventType ?? '');
@@ -571,6 +574,8 @@ export function registerSessionTools(server: McpServer, ga: boolean, delegated:
         const relevanceScore = (e: Partial<EnrollmentEvent>): number => {
           // Benign compliant detection mis-stamped Error → rank as info-level, not top.
           if (isBenignHealthDetectionReport(String(e.eventType ?? ''), e.data)) return 10;
+          // A failure that was another script's exit code is not a failure of this one.
+          if (isCorrectedForeignFailure(String(e.eventType ?? ''), e.data, foreignRuns)) return 10;
           const sev = SEVERITY_RANK[String(e.severity ?? '')] ?? -1;
           if (sev >= 3) return 100;                        // Error/Critical
           if (PHASE_EVENT_TYPES.has(String(e.eventType ?? ''))) return 60;
@@ -597,7 +602,10 @@ export function registerSessionTools(server: McpServer, ga: boolean, delegated:
           phase: phaseName(e.phase, s.enrollmentType),
           message: e.message,
           source: e.source,
-          ...keyEventErrorCode(e.data, e.source),
+          // The exit code on a corrected run was another script's: no catalog text for it.
+          ...(isCorrectedForeignFailure(String(e.eventType ?? ''), e.data, foreignRuns)
+            ? { correctedByImeSavedResult: true }
+            : keyEventErrorCode(e.data, e.source)),
         }));
 
         let analysis = null;
diff --git a/src/McpServer/autopilot-monitor-mcp/src/tools/shared.ts b/src/McpServer/autopilot-monitor-mcp/src/tools/shared.ts
index 1b0030f2..da084c7d 100644
--- a/src/McpServer/autopilot-monitor-mcp/src/tools/shared.ts
+++ b/src/McpServer/autopilot-monitor-mcp/src/tools/shared.ts
@@ -75,6 +75,8 @@ export function leanFieldSelection(
 export const SUMMARY_EVENT_FIELDS =
   'eventType,severity,source,phase,timestamp,message,sequence,' +
   'data.scriptType,data.script_type,data.scriptPart,data.script_part,data.result,' +
+  // Platform-run corrections from IME's saved result (foreignSuccessRunIds below).
+  'data.runId,data.outcome,' +
   'data.rejectedSourceTimestamp,data.rejected_source_timestamp,' +
   'data.errorCode,data.exitCode,data.hresult,data.hresultFromWin32,data.hresultSymbol,' +
   'data.errorCodeInfo,data.exitCodeInfo,data.hresultInfo,data.hresultFromWin32Info,' +
@@ -125,6 +127,38 @@ export function isBenignHealthDetectionReport(
   return true;
 }
 
+/**
+ * Run ids of platform runs whose `script_failed` came from another script's end block while IME
+ * itself reported Success: `script_output_reconciliation` with outcome "foreign" and result Success
+ * (D-316 — the agent had attributed a foreign executor's exit code and output; IME's saved result
+ * proved it). The stored `script_failed` stays as written; read sides treat it like the benign
+ * detection reports above: no error count, info-level rank, no exit-code catalog text.
+ */
+export function foreignSuccessRunIds(
+  events: ReadonlyArray<{ eventType?: string | null; data?: Record<string, unknown> }>,
+): Set<string> {
+  const runs = new Set<string>();
+  for (const e of events) {
+    if (e.eventType !== 'script_output_reconciliation' || !e.data) continue;
+    if (String(e.data.outcome ?? '') !== 'foreign') continue;
+    if (String(e.data.result ?? '').toLowerCase() !== 'success') continue;
+    const runId = e.data.runId;
+    if (typeof runId === 'string' && runId.length > 0) runs.add(runId);
+  }
+  return runs;
+}
+
+/** True for a `script_failed` whose run `foreignSuccessRunIds` names. */
+export function isCorrectedForeignFailure(
+  eventType: string | undefined,
+  data: Record<string, unknown> | undefined,
+  foreignRuns: ReadonlySet<string>,
+): boolean {
+  if (eventType !== 'script_failed' || !data || foreignRuns.size === 0) return false;
+  const runId = data.runId;
+  return typeof runId === 'string' && foreignRuns.has(runId);
+}
+
 /**
  * Builds the role-aware description for a tenant-boundable tool's `tenantId` argument. MCP clients weigh
  * the per-arg schema heavily, so a delegated (MSP) caller — for whom omitting tenantId is REJECTED, not
diff --git a/src/Web/autopilot-monitor-web/app/gather-rules/eventTypes.ts b/src/Web/autopilot-monitor-web/app/gather-rules/eventTypes.ts
index 333040a1..f9510d60 100644
--- a/src/Web/autopilot-monitor-web/app/gather-rules/eventTypes.ts
+++ b/src/Web/autopilot-monitor-web/app/gather-rules/eventTypes.ts
@@ -152,6 +152,8 @@ export const KNOWN_EVENT_TYPES: EventTypeEntry[] = [
     description: "A platform script completed, or one phase (detection / remediation / post-detection) of a health script completed. Health scripts emit up to three of these per policy run." },
   { value: "script_failed", label: "script_failed", category: "script",
     description: "A platform script crashed (exit code != 0), or the remediation phase of a health script crashed. Health-script detection / post-detection phases use exit code as a compliance verdict (non-zero = non-compliant) and emit script_completed even on non-zero exit; only a true script crash in those phases would surface here." },
+  { value: "script_output_reconciliation", label: "script_output_reconciliation", category: "script",
+    description: "A platform script's reported output disagreed with the result IME saved after reporting the script batch. Outcome \"foreign\" (Warning): the run had been given another script's output and exit code; the saved output replaces it and the exit code is unknown. Outcome \"repaired\" (Info): the output had arrived incomplete. Carries runId (the corrected run), policyId, outcome, reason, result, stdout and stderr." },
   { value: "script_timeout_suspected", label: "script_timeout_suspected", category: "script",
     description: "A platform script ran to the IME script-execution timeout (~30 min; threshold 25 min) and was marked Failed while the enrollment was in progress. IME runs platform scripts serially, so a hung script starves app installs and the Autopilot-Monitor bootstrap — the prime suspect behind a late agent start / pre-failed ESP. Advisory (one per policyId); carries durationSeconds, exitCode and espPhase." },
   { value: "script_recurrence_summary", label: "script_recurrence_summary", category: "script",
diff --git a/src/Web/autopilot-monitor-web/app/sessions/components/EventTimeline.tsx b/src/Web/autopilot-monitor-web/app/sessions/components/EventTimeline.tsx
index 9b11a4eb..550e656c 100644
--- a/src/Web/autopilot-monitor-web/app/sessions/components/EventTimeline.tsx
+++ b/src/Web/autopilot-monitor-web/app/sessions/components/EventTimeline.tsx
@@ -1,6 +1,6 @@
 "use client";
 
-import { useState, useMemo, useDeferredValue } from "react";
+import { createContext, useContext, useState, useMemo, useDeferredValue } from "react";
 import { EnrollmentEvent, Session } from "@/types";
 import { normalizeEventDataForDisplay, shortenBuildHashInMessage } from "../utils/eventHelpers";
 import { buildEventSearchMatcher, formatEventSearchTerm, parseEventSearchQuery } from "../utils/eventSearchQuery";
@@ -8,6 +8,11 @@ import { getEnrichedOrLookup, formatErrorCode, errorCodeTooltip, type ErrorCodeI
 import { readTimeProvenance, classifyTimeJump, readClockChangeDeltaMs } from "@/lib/timeProvenance";
 import { isRebootOrRetryClass } from "@/lib/installProgress";
 import { formatDuration, formatUtcOffset } from "@/lib/formatting";
+import { SCRIPT_OUTPUT_RECONCILIATION } from "@/lib/scriptExecutions";
+
+// runId → outcome of every platform run that IME's saved result corrected later (D-316): the
+// run's own row says so, so its emitted output is never read as the script's.
+const CorrectedRunsContext = createContext<ReadonlyMap<string, "foreign" | "repaired">>(new Map());
 
 const SEARCH_SYNTAX_HINT =
   "Searches event type, message, source and the details JSON (e.g. gather output). " +
@@ -104,10 +109,20 @@ export default function EventTimeline({
     [events],
   );
 
+  const correctedRuns = useMemo(() => {
+    const runs = new Map<string, "foreign" | "repaired">();
+    for (const e of events) {
+      if (e.eventType !== SCRIPT_OUTPUT_RECONCILIATION) continue;
+      const runId = e.data?.runId;
+      if (typeof runId === "string" && runId.length > 0) runs.set(runId, e.data?.outcome === "foreign" ? "foreign" : "repaired");
+    }
+    return runs;
+  }, [events]);
+
   const filterPhaseEvents = (phaseEvents: EnrollmentEvent[]) =>
     matchesSearch ? phaseEvents.filter(matchesSearch) : phaseEvents;
 
-  return (
+  const timeline = (
     <div className="space-y-6">
       {/* Search + Severity filters + Expand/Collapse — shared controls above the timeline(s) */}
       <div className="flex flex-col sm:flex-row sm:items-center gap-2">
@@ -356,6 +371,8 @@ export default function EventTimeline({
       )}
     </div>
   );
+
+  return <CorrectedRunsContext.Provider value={correctedRuns}>{timeline}</CorrectedRunsContext.Provider>;
 }
 
 function PhaseSection({
@@ -515,7 +532,13 @@ function EventRow({ event, showScriptOutput, prevEvent, clockDeltas }: { event:
   // timeline still applies the same script-event styling/iconography.
   const isScriptEvent = event.eventType === "script_started"
     || event.eventType === "script_completed"
-    || event.eventType === "script_failed";
+    || event.eventType === "script_failed"
+    || event.eventType === SCRIPT_OUTPUT_RECONCILIATION;
+  const correctedRuns = useContext(CorrectedRunsContext);
+  const eventRunId = event.data?.runId;
+  const laterCorrection = event.eventType !== SCRIPT_OUTPUT_RECONCILIATION && typeof eventRunId === "string"
+    ? correctedRuns.get(eventRunId)
+    : undefined;
   const detailData = useMemo(() => {
     if (!rawDetailData || !isScriptEvent || showScriptOutput !== false) return rawDetailData;
     const filtered = { ...rawDetailData };
@@ -611,6 +634,13 @@ function EventRow({ event, showScriptOutput, prevEvent, clockDeltas }: { event:
             <span className="text-sm font-medium text-gray-900">{event.eventType}</span>
           </div>
           <p className="mt-1 text-sm text-gray-600" title={event.message || undefined}>{shortenBuildHashInMessage(event.message)}</p>
+          {laterCorrection && (
+            <p className="mt-0.5 text-xs text-gray-500">
+              {laterCorrection === "foreign"
+                ? "Corrected later from IME's saved result: the output and exit code on this row belonged to another script."
+                : "Output completed later from IME's saved result."}
+            </p>
+          )}
           {/* Exit code / HRESULT badge for app install events */}
           {(event.eventType === "app_install_failed" || event.eventType === "app_install_completed") && (() => {
             const ec = (event.data?.exitCode ?? event.data?.exit_code) as string | number | undefined;
diff --git a/src/Web/autopilot-monitor-web/app/sessions/page.tsx b/src/Web/autopilot-monitor-web/app/sessions/page.tsx
index 54db9a30..846003b0 100644
--- a/src/Web/autopilot-monitor-web/app/sessions/page.tsx
+++ b/src/Web/autopilot-monitor-web/app/sessions/page.tsx
@@ -234,6 +234,8 @@ function SessionDetailContent() {
       e => e.eventType === "script_started"
         || e.eventType === "script_completed"
         || e.eventType === "script_failed"
+        // Corrections of a platform run from IME's saved result (D-316) — applied by the reducer.
+        || e.eventType === "script_output_reconciliation"
     ),
     [events]
   );
diff --git a/src/Web/autopilot-monitor-web/components/ScriptExecutions.tsx b/src/Web/autopilot-monitor-web/components/ScriptExecutions.tsx
index 614f608a..f91851ec 100644
--- a/src/Web/autopilot-monitor-web/components/ScriptExecutions.tsx
+++ b/src/Web/autopilot-monitor-web/components/ScriptExecutions.tsx
@@ -30,6 +30,14 @@ import PhaseDivider from "@/components/PhaseDivider";
 // span is hours of offset error rather than run time (a 10 s script once read "1h 00m").
 const DURATION_SUPPRESSED_TITLE = "Run time not measurable: the start and end log lines were resolved on different timezone assumptions, so their span would be offset error, not run time";
 
+// IME's saved result corrected the run (script_output_reconciliation): the log had attributed
+// another script's end block to it, so its exit code is unknown and the output shown is IME's.
+const EXIT_UNVERIFIED_TITLE = "Exit code unknown: the IME log had attributed another script's output and exit code to this run. The output shown is this script's own, as IME saved it.";
+const OUTPUT_CORRECTED_TITLE: Record<"foreign" | "repaired", string> = {
+  foreign: "The IME log had attributed another script's output to this run. This is the script's own output, as IME saved it after reporting the result.",
+  repaired: "The IME log delivered this output incomplete. This is the full output, as IME saved it after reporting the result.",
+};
+
 interface ScriptExecutionsProps {
   events: ScriptInputEvent[];
   showScriptOutput?: boolean;
@@ -528,6 +536,9 @@ function ScriptItemRow({ item, showScriptOutput, latestBootstrapVersion, nested,
               exit {item.exitCode}
             </span>
           )}
+          {item.exitCode == null && item.outputCorrection === "foreign" && (
+            <span className="font-mono text-gray-400" title={EXIT_UNVERIFIED_TITLE}>exit n/a</span>
+          )}
           {durationLabel && (
             <span
               className={`font-mono ${isSlowDuration ? "text-amber-600 font-medium" : "text-gray-500"}`}
@@ -564,6 +575,9 @@ function ScriptItemRow({ item, showScriptOutput, latestBootstrapVersion, nested,
             {!nested && item.runContext && <span><span className="font-medium text-gray-700">Context:</span> {item.runContext}</span>}
             {!nested && item.targetType != null && <span><span className="font-medium text-gray-700">Target:</span> {item.targetType === 2 ? "Device" : "User"}</span>}
             {item.exitCode != null && <span><span className="font-medium text-gray-700">Exit Code:</span> <span className="font-mono">{item.exitCode}</span></span>}
+            {item.exitCode == null && item.outputCorrection === "foreign" && (
+              <span title={EXIT_UNVERIFIED_TITLE}><span className="font-medium text-gray-700">Exit Code:</span> <span className="font-mono text-gray-400">n/a</span></span>
+            )}
             {detailDurationLabel && <span><span className="font-medium text-gray-700">Duration:</span> <span className={`font-mono ${isSlowDuration ? "text-amber-600" : ""}`}>{detailDurationLabel}</span></span>}
             {!detailDurationLabel && item.durationSuppressedReason && (
               <span title={DURATION_SUPPRESSED_TITLE}><span className="font-medium text-gray-700">Duration:</span> <span className="font-mono text-gray-400">n/a</span></span>
@@ -601,7 +615,12 @@ function ScriptItemRow({ item, showScriptOutput, latestBootstrapVersion, nested,
 
           {hasStdout && (
             <div>
-              <div className="text-xs font-medium text-gray-500 mb-1">stdout</div>
+              <div className="text-xs font-medium text-gray-500 mb-1">
+                stdout
+                {item.outputCorrection && (
+                  <span className="font-normal text-gray-400" title={OUTPUT_CORRECTED_TITLE[item.outputCorrection]}>{" · from IME's saved result"}</span>
+                )}
+              </div>
               <div className="p-2 bg-gray-900 rounded text-xs text-gray-100 font-mono overflow-x-auto max-h-48 overflow-y-auto">
                 <pre className="whitespace-pre-wrap break-words">{item.stdout}</pre>
               </div>
@@ -614,7 +633,12 @@ function ScriptItemRow({ item, showScriptOutput, latestBootstrapVersion, nested,
 
           {hasStderr && (
             <div>
-              <div className="text-xs font-medium text-red-500 mb-1">stderr</div>
+              <div className="text-xs font-medium text-red-500 mb-1">
+                stderr
+                {item.outputCorrection && (
+                  <span className="font-normal text-gray-400" title={OUTPUT_CORRECTED_TITLE[item.outputCorrection]}>{" · from IME's saved result"}</span>
+                )}
+              </div>
               <div className="p-2 bg-gray-900 rounded text-xs text-red-300 font-mono overflow-x-auto max-h-48 overflow-y-auto">
                 <pre className="whitespace-pre-wrap break-words">{item.stderr}</pre>
               </div>
diff --git a/src/Web/autopilot-monitor-web/lib/__tests__/scriptExecutions.test.ts b/src/Web/autopilot-monitor-web/lib/__tests__/scriptExecutions.test.ts
index d62afedf..2fb39f5f 100644
--- a/src/Web/autopilot-monitor-web/lib/__tests__/scriptExecutions.test.ts
+++ b/src/Web/autopilot-monitor-web/lib/__tests__/scriptExecutions.test.ts
@@ -1201,3 +1201,81 @@ describe("isOnOffsetGrid", () => {
     expect(isOnOffsetGrid(0)).toBe(false);
   });
 });
+
+describe("reduceScriptEvents — correction from IME's saved result (D-316)", () => {
+  const POLICY = "d94468af-6ebe-4e94-9901-2a62d33ea6c1";
+  const OWN = "=== Autopilot Monitor Bootstrap Started =====\nBootstrap script version: v2.5\nInstaller finished (exit code 0).";
+  const FOREIGN = "VERBOSE: === Sample Suite Detection Started ===\nWARNING: === DETECTION FAILED ===";
+  const correction = (data: Record<string, unknown>, at = 60): ScriptInputEvent => ({
+    timestamp: ts(at),
+    eventType: "script_output_reconciliation",
+    data: { policyId: POLICY, scriptType: "platform", ...data },
+  });
+
+  it("a foreign end block is replaced: the script's own output, no exit code, Success", () => {
+    const items = reduceScriptEvents([
+      finalEvent({ eventType: "script_failed", data: { policyId: POLICY, scriptType: "platform", runId: "r1", result: "Success", exitCode: "1", stdout: FOREIGN } }),
+      correction({ runId: "r1", outcome: "foreign", result: "Success", stdout: OWN, stderr: "", previousExitCode: "1" }),
+    ]);
+    expect(items).toHaveLength(1);
+    expect(items[0].state).toBe("Success");
+    expect(items[0].exitCode).toBeUndefined();
+    expect(items[0].stdout).toBe(OWN);
+    expect(items[0].stdout).not.toContain("Detection");
+    expect(items[0].outputCorrection).toBe("foreign");
+    expect(items[0].bootstrapVersion).toBe("2.5");
+  });
+
+  it("an incomplete output is completed and the exit code stands", () => {
+    const items = reduceScriptEvents([
+      finalEvent({ data: { policyId: POLICY, scriptType: "platform", runId: "r2", result: "Success", exitCode: "0" } }),
+      correction({ runId: "r2", outcome: "repaired", result: "Success", stdout: OWN, stderr: "" }),
+    ]);
+    expect(items[0].exitCode).toBe(0);
+    expect(items[0].stdout).toBe(OWN);
+    expect(items[0].outputCorrection).toBe("repaired");
+  });
+
+  it("a stdout split into stderr is mended: the empty stderr clears the failure", () => {
+    const items = reduceScriptEvents([
+      finalEvent({ eventType: "script_failed", data: { policyId: POLICY, scriptType: "platform", runId: "r3", result: "Success", exitCode: "0", stdout: "Copying files", stderr: "0 errors\nDone, error =" } }),
+      correction({ runId: "r3", outcome: "repaired", result: "Success", stdout: "Copying files, error = 0 errors\nDone", stderr: "" }),
+    ]);
+    expect(items[0].state).toBe("Success");
+    expect(items[0].stderr).toBeUndefined();
+    expect(items[0].stdout).toBe("Copying files, error = 0 errors\nDone");
+  });
+
+  it("a correction only applies to the run it names", () => {
+    const items = reduceScriptEvents([
+      finalEvent({ eventType: "script_failed", data: { policyId: POLICY, scriptType: "platform", runId: "r4", result: "Success", exitCode: "1", stdout: FOREIGN } }),
+      correction({ runId: "another-run", outcome: "foreign", result: "Success", stdout: OWN, stderr: "" }),
+    ]);
+    expect(items[0].state).toBe("Failed");
+    expect(items[0].exitCode).toBe(1);
+    expect(items[0].outputCorrection).toBeUndefined();
+  });
+
+  it("a correction without a stdout key keeps the emitted stdout", () => {
+    const items = reduceScriptEvents([
+      finalEvent({ eventType: "script_failed", data: { policyId: POLICY, scriptType: "platform", runId: "r5", result: "Failed", exitCode: "1", stdout: "partial" } }),
+      correction({ runId: "r5", outcome: "repaired", result: "Failed", stderr: "Access denied" }),
+    ]);
+    expect(items[0].stdout).toBe("partial");
+    expect(items[0].stderr).toBe("Access denied");
+    expect(items[0].state).toBe("Failed");
+  });
+
+  it("two runs of the same script never surface the corrected run's foreign output", () => {
+    const items = reduceScriptEvents([
+      finalEvent({ ts: 0, data: { policyId: POLICY, scriptType: "platform", runId: "old", result: "Success", exitCode: "0", runContext: "System", stdout: OWN } }),
+      finalEvent({ ts: 30, eventType: "script_failed", data: { policyId: POLICY, scriptType: "platform", runId: "r6", result: "Success", exitCode: "1", runContext: "System", stdout: FOREIGN } }),
+      correction({ runId: "r6", outcome: "foreign", result: "Success", stdout: OWN, stderr: "" }),
+    ]);
+    expect(items).toHaveLength(1);
+    expect(items[0].stdout).toBe(OWN);
+    expect(items[0].stdout).not.toContain("Detection");
+    expect(items[0].state).toBe("Success");
+    expect(items[0].exitCode === 1).toBe(false);
+  });
+});
diff --git a/src/Web/autopilot-monitor-web/lib/scriptExecutions.ts b/src/Web/autopilot-monitor-web/lib/scriptExecutions.ts
index 08e94925..0185e516 100644
--- a/src/Web/autopilot-monitor-web/lib/scriptExecutions.ts
+++ b/src/Web/autopilot-monitor-web/lib/scriptExecutions.ts
@@ -36,8 +36,19 @@ interface ScriptEventData {
   sourceOffsetOrigin?: string;
   /** "true" when the line's own timestamp was rejected and the event was stamped from the clock. */
   derivedTimestamp?: string | boolean;
+  /** Identity of one platform-script run; a script_output_reconciliation names the run it corrects (agents from 2026-10 on). */
+  runId?: string;
+  /** On script_output_reconciliation: "foreign" (the run had another script's end block) or "repaired". */
+  outcome?: string;
 }
 
+/**
+ * A platform run corrected after the fact from IME's saved result (D-316). Its `runId` names the
+ * script_completed/script_failed it corrects; a present `stdout`/`stderr` key replaces the emitted
+ * value (empty clears it), `outcome` "foreign" makes the emitted exit code unverified.
+ */
+export const SCRIPT_OUTPUT_RECONCILIATION = "script_output_reconciliation";
+
 export interface ScriptItem {
   policyId: string;
   scriptType: string;        // "platform" | "remediation"
@@ -80,6 +91,12 @@ export interface ScriptItem {
   state: "Running" | "Success" | "Failed";
   timestamp: string;
   bootstrapVersion?: string | null;
+  /**
+   * Set when IME's saved result corrected the run (script_output_reconciliation): "foreign" — the
+   * log had given the run another script's end block, so the output shown is the script's own from
+   * IME and the exit code is unknown; "repaired" — the log had delivered the output incomplete.
+   */
+  outputCorrection?: "foreign" | "repaired";
   /**
    * Set by applyObservationEnd, never by the fold: the script was still running when the
    * session's observation ended. Terminal, neither a failure nor a success — the outcome was
@@ -198,6 +215,9 @@ export function partitionHistoricScriptEvents(events: ScriptInputEvent[]): Histo
 function dataCompleteness(item: ScriptItem): number {
   let score = 0;
   if (item.exitCode != null) score += 4; // exit code is the most important signal
+  // A run corrected from IME's saved result lost a foreign exit code, not data: it must not lose
+  // the merge against a sibling run for that.
+  if (item.outputCorrection === "foreign") score += 4;
   if (item.result) score += 2;
   if (item.complianceResult) score += 2;
   if (item.remediationStatus != null) score += 1;
@@ -224,6 +244,18 @@ export function toNumber(v: unknown): number | undefined {
   return undefined;
 }
 
+/**
+ * The value a correction publishes for `key`, or the emitted one: a present key replaces it (an
+ * empty string clears it), an absent key keeps it.
+ */
+function correctedText(correction: ScriptEventData | undefined, key: "stdout" | "stderr", emitted: unknown): string | undefined {
+  if (correction && typeof correction[key] === "string") {
+    const value = correction[key] as string;
+    return value.length > 0 ? value : undefined;
+  }
+  return typeof emitted === "string" ? emitted : undefined;
+}
+
 /** Map RemediationStatus enum to the human-readable label shown in the detail panel. */
 export function mapRemediationStatus(status?: number): string | null {
   switch (status) {
@@ -378,7 +410,14 @@ export function reduceScriptEvents(events: ScriptInputEvent[]): ScriptItem[] {
   // script_started events per (policyId, scriptType) in timestamp order — the start line a
   // final is paired with when its run duration is judged (see judgeDurationPair).
   const startsByPolicy = new Map<string, ScriptInputEvent[]>();
+  // IME's saved result corrects a platform run after the fact; the correction names the run.
+  const correctionsByRunId = new Map<string, ScriptEventData>();
   for (const evt of sorted) {
+    if (evt.eventType === SCRIPT_OUTPUT_RECONCILIATION) {
+      const c = evt.data as ScriptEventData | undefined;
+      if (c && typeof c.runId === "string" && c.runId.length > 0) correctionsByRunId.set(c.runId, c);
+      continue;
+    }
     if (evt.eventType !== "script_started") continue;
     const d = evt.data as ScriptEventData | undefined;
     const startPolicyId = d?.policyId ?? d?.policy_id;
@@ -402,7 +441,10 @@ export function reduceScriptEvents(events: ScriptInputEvent[]): ScriptItem[] {
     const key = `${dedupeId}-${scriptType}-${scriptPart ?? ""}`;
     if (policyId) policyIdsWithFinal.add(`${policyId}-${scriptType}`);
 
-    const exitCode = toNumber(d.exitCode ?? d.exit_code);
+    const correction = typeof d.runId === "string" ? correctionsByRunId.get(d.runId) : undefined;
+    const outputCorrection = correction ? (correction.outcome === "foreign" ? "foreign" : "repaired") : undefined;
+    // A foreign end block's exit code belongs to another script: unknown, not the emitted value.
+    const exitCode = outputCorrection === "foreign" ? undefined : toNumber(d.exitCode ?? d.exit_code);
 
     // Duration normalization — the wire field durationSeconds carries two different
     // semantics, named by durationBasis (see the ScriptItem field docs):
@@ -435,8 +477,9 @@ export function reduceScriptEvents(events: ScriptInputEvent[]): ScriptItem[] {
     const remediationStatus = toNumber(d.remediationStatus ?? d.remediation_status);
     const targetType = toNumber(d.targetType ?? d.target_type);
     const errorCode = toNumber(d.errorCode ?? d.error_code);
-    const stdout = typeof d.stdout === "string" ? d.stdout : undefined;
-    const stderr = typeof d.stderr === "string" ? d.stderr : undefined;
+    const stdout = correctedText(correction, "stdout", d.stdout);
+    const stderr = correctedText(correction, "stderr", d.stderr);
+    const result = (typeof correction?.result === "string" ? correction.result : undefined) ?? d.result;
     const hasStderr = !!stderr && stderr.trim().length > 0;
 
     // State derivation — rules in priority order (mirrors the agent's EmitScriptCompleted):
@@ -450,8 +493,10 @@ export function reduceScriptEvents(events: ScriptInputEvent[]): ScriptItem[] {
     //   3. Defensive: explicit script_failed eventType OR result === "Failed" → Failed.
     const isHealthComplianceReport = scriptType === "remediation"
       && (scriptPart === "detection" || scriptPart === "post-detection");
-    const isFailureSignal = evt.eventType === "script_failed"
-      || d.result === "Failed"
+    // A corrected run is judged on its corrected data: the agent chose script_failed from the
+    // emitted values the correction replaced.
+    const isFailureSignal = (!correction && evt.eventType === "script_failed")
+      || result === "Failed"
       || (!isHealthComplianceReport && (hasStderr || (exitCode != null && exitCode !== 0)));
 
     const candidate: ScriptItem = {
@@ -460,7 +505,7 @@ export function reduceScriptEvents(events: ScriptInputEvent[]): ScriptItem[] {
       scriptPart,
       runContext: d.runContext ?? d.run_context,
       exitCode,
-      result: d.result,
+      result,
       complianceResult: d.complianceResult ?? d.compliance_result,
       remediationStatus,
       targetType,
@@ -476,6 +521,7 @@ export function reduceScriptEvents(events: ScriptInputEvent[]): ScriptItem[] {
       timestamp: evt.timestamp,
       bootstrapVersion: scriptType === "platform" ? extractBootstrapVersion(stdout) : null,
       isIncomplete: false,
+      outputCorrection,
     };
 
     // Keep the most-complete entry, but merge the duration fields across both: the