diff --git a/scripts/agent/run-scheduler-cycle.mjs b/scripts/agent/run-scheduler-cycle.mjs
index 64b2f03..d3ee006 100644
--- a/scripts/agent/run-scheduler-cycle.mjs
+++ b/scripts/agent/run-scheduler-cycle.mjs
@@ -256,6 +256,7 @@ async function main() {
     }
 
     const promptPath = path.resolve(process.cwd(), 'src/prompts', cadence, `${selectedAgent}.md`);
+    const runArtifactSince = new Date().toISOString();
     if (schedulerConfig.handoffCommand) {
       const handoff = await runCommand('bash', ['-lc', schedulerConfig.handoffCommand], {
         env: { AGENT_PLATFORM: platform, SCHEDULER_AGENT: selectedAgent, SCHEDULER_CADENCE: cadence, SCHEDULER_PROMPT_PATH: promptPath },
@@ -272,6 +273,24 @@ async function main() {
       process.exit(1);
     }
 
+    const artifactCheck = await runCommand('node', [
+      'scripts/agent/verify-run-artifacts.mjs',
+      '--since',
+      runArtifactSince,
+      '--check-failure-notes',
+    ]);
+    if (artifactCheck.code !== 0) {
+      const detail = artifactCheck.stderr.trim() || artifactCheck.stdout.trim() || 'Artifact verification failed.';
+      await writeLog({
+        cadence,
+        agent: selectedAgent,
+        status: 'failed',
+        reason: 'Missing required run artifacts',
+        detail,
+      });
+      process.exit(artifactCheck.code);
+    }
+
     for (const validation of schedulerConfig.validationCommands) {
       const parts = validation.split(' ').filter(Boolean);
       if (!parts.length) continue;
diff --git a/scripts/agent/verify-run-artifacts.mjs b/scripts/agent/verify-run-artifacts.mjs
new file mode 100644
index 0000000..c212be5
--- /dev/null
+++ b/scripts/agent/verify-run-artifacts.mjs
@@ -0,0 +1,165 @@
+#!/usr/bin/env node
+import fs from 'node:fs/promises';
+import path from 'node:path';
+
+const REQUIRED_ARTIFACTS = [
+  { dir: 'src/context', expectedPrefix: 'CONTEXT_' },
+  { dir: 'src/todo', expectedPrefix: 'TODO_' },
+  { dir: 'src/decisions', expectedPrefix: 'DECISIONS_' },
+  { dir: 'src/test_logs', expectedPrefix: 'TEST_LOG_' },
+];
+
+function parseArgs(argv) {
+  const args = {
+    since: null,
+    session: null,
+    checkFailureNotes: false,
+  };
+
+  for (let i = 0; i < argv.length; i += 1) {
+    const value = argv[i];
+    if (value === '--since') {
+      args.since = argv[i + 1] || null;
+      i += 1;
+      continue;
+    }
+    if (value === '--session') {
+      args.session = argv[i + 1] || null;
+      i += 1;
+      continue;
+    }
+    if (value === '--check-failure-notes') {
+      args.checkFailureNotes = true;
+    }
+  }
+
+  return args;
+}
+
+function toMs(iso) {
+  if (!iso) return null;
+  const value = Date.parse(iso);
+  return Number.isFinite(value) ? value : null;
+}
+
+function isNotNeededNote(content) {
+  return /\bnot needed\b/i.test(content);
+}
+
+async function listRecentFiles(dirPath, sinceMs) {
+  try {
+    const entries = await fs.readdir(dirPath, { withFileTypes: true });
+    const files = [];
+    for (const entry of entries) {
+      if (!entry.isFile()) continue;
+      const filePath = path.join(dirPath, entry.name);
+      const stat = await fs.stat(filePath);
+      if (sinceMs != null && stat.mtimeMs < sinceMs) continue;
+      files.push({ name: entry.name, filePath, mtimeMs: stat.mtimeMs });
+    }
+    return files.sort((a, b) => a.mtimeMs - b.mtimeMs);
+  } catch {
+    return [];
+  }
+}
+
+async function hasExplicitNotNeeded(files) {
+  for (const file of files) {
+    const content = await fs.readFile(file.filePath, 'utf8').catch(() => '');
+    if (isNotNeededNote(content)) return true;
+  }
+  return false;
+}
+
+function hasExpectedArtifact(files, { expectedPrefix, session }) {
+  if (!files.length) return false;
+  if (session) {
+    return files.some((file) => file.name.includes(session));
+  }
+  return files.some((file) => file.name.startsWith(expectedPrefix));
+}
+
+async function checkFailureTracking({ sinceMs }) {
+  const recentTestLogs = await listRecentFiles(path.resolve(process.cwd(), 'src/test_logs'), sinceMs);
+  let sawFailure = false;
+
+  for (const file of recentTestLogs) {
+    const content = await fs.readFile(file.filePath, 'utf8').catch(() => '');
+    if (/\b(fail|failed|failure|error)\b/i.test(content)) {
+      sawFailure = true;
+      break;
+    }
+  }
+
+  if (!sawFailure) {
+    return { ok: true, message: null };
+  }
+
+  const knownIssuesStat = await fs.stat(path.resolve(process.cwd(), 'KNOWN_ISSUES.md')).catch(() => null);
+  const incidents = await listRecentFiles(path.resolve(process.cwd(), 'docs/agent-handoffs/incidents'), sinceMs);
+
+  const touchedKnownIssues = Boolean(knownIssuesStat && (sinceMs == null || knownIssuesStat.mtimeMs >= sinceMs));
+  const touchedIncident = incidents.length > 0;
+
+  if (touchedKnownIssues || touchedIncident) {
+    return { ok: true, message: null };
+  }
+
+  return {
+    ok: false,
+    message: 'Failure-related output detected in src/test_logs but neither KNOWN_ISSUES.md nor docs/agent-handoffs/incidents/ were updated during this run.',
+  };
+}
+
+async function main() {
+  const args = parseArgs(process.argv.slice(2));
+  const sinceMs = toMs(args.since);
+
+  if (args.since && sinceMs == null) {
+    console.error(`Invalid --since value: ${args.since}`);
+    process.exit(2);
+  }
+
+  const missing = [];
+
+  for (const artifact of REQUIRED_ARTIFACTS) {
+    const dirPath = path.resolve(process.cwd(), artifact.dir);
+    const files = await listRecentFiles(dirPath, sinceMs);
+    const hasExpected = hasExpectedArtifact(files, {
+      expectedPrefix: artifact.expectedPrefix,
+      session: args.session,
+    });
+
+    if (hasExpected) continue;
+
+    const hasNotNeeded = await hasExplicitNotNeeded(files);
+    if (hasNotNeeded) continue;
+
+    const expectedName = args.session
+      ? `${artifact.expectedPrefix}${args.session}.md`
+      : `${artifact.expectedPrefix}<timestamp>.md`;
+    missing.push(`${artifact.dir}/${expectedName}`);
+  }
+
+  if (args.checkFailureNotes) {
+    const failureTracking = await checkFailureTracking({ sinceMs });
+    if (!failureTracking.ok && failureTracking.message) {
+      missing.push(failureTracking.message);
+    }
+  }
+
+  if (missing.length) {
+    console.error('Missing required run artifacts:');
+    for (const item of missing) {
+      console.error(`- ${item}`);
+    }
+    process.exit(1);
+  }
+
+  console.log('Run artifacts verified.');
+}
+
+main().catch((err) => {
+  console.error(err);
+  process.exit(1);
+});