function safeClone(value, fallback = null) {
  if (value == null) return fallback;
  try {
    if (typeof structuredClone === "function") {
      return structuredClone(value);
    }
  } catch {
  }
  try {
    return JSON.parse(JSON.stringify(value));
  } catch {
    return fallback ?? value;
  }
}

function normalizeRecordId(value) {
  return String(value ?? "").trim();
}

function truncateText(value, maxLength = 4000) {
  const text = String(value ?? "");
  if (!text) return "";
  if (!Number.isFinite(maxLength) || maxLength < 1 || text.length <= maxLength) {
    return text;
  }
  return `${text.slice(0, Math.max(1, maxLength - 1))}…`;
}

function buildHash(input = "") {
  let hash = 2166136261;
  const text = String(input ?? "");
  for (let index = 0; index < text.length; index += 1) {
    hash ^= text.charCodeAt(index);
    hash = Math.imul(hash, 16777619);
  }
  return (hash >>> 0).toString(36);
}

function buildSafeSlug(input = "", fallback = "unknown") {
  const normalized = String(input || fallback)
    .trim()
    .replace(/[^A-Za-z0-9._-]+/g, "_")
    .replace(/_+/g, "_")
    .replace(/^[_.-]+|[_.-]+$/g, "")
    .slice(0, 96);
  return normalized || fallback;
}

function buildCompactTimestamp(date = new Date()) {
  const year = date.getUTCFullYear();
  const month = String(date.getUTCMonth() + 1).padStart(2, "0");
  const day = String(date.getUTCDate()).padStart(2, "0");
  const hour = String(date.getUTCHours()).padStart(2, "0");
  const minute = String(date.getUTCMinutes()).padStart(2, "0");
  const second = String(date.getUTCSeconds()).padStart(2, "0");
  return `${year}${month}${day}-${hour}${minute}${second}`;
}

const AUTHORITY_DIAGNOSTICS_MANIFEST_VERSION = 1;
export const AUTHORITY_DIAGNOSTICS_MANIFEST_LIMIT = 12;

function isSensitiveKey(key = "") {
  return /(api[_-]?key|token|secret|password|authorization|auth[_-]?header|cookie)/i.test(
    String(key || ""),
  );
}

function sanitizeValue(value, key = "", depth = 0) {
  if (depth > 8) {
    return "[Truncated]";
  }
  if (value == null) return value;
  if (isSensitiveKey(key)) {
    return String(value || "") ? "[REDACTED]" : "";
  }
  if (Array.isArray(value)) {
    return value.map((entry) => sanitizeValue(entry, "", depth + 1));
  }
  if (typeof value === "object") {
    const result = {};
    for (const [childKey, childValue] of Object.entries(value)) {
      result[childKey] = sanitizeValue(childValue, childKey, depth + 1);
    }
    return result;
  }
  return value;
}

function buildGraphSummary(graph = null) {
  const runtimeGraph = graph && typeof graph === "object" && !Array.isArray(graph) ? graph : {};
  const nodes = Array.isArray(runtimeGraph.nodes) ? runtimeGraph.nodes : [];
  const edges = Array.isArray(runtimeGraph.edges) ? runtimeGraph.edges : [];
  const activeNodes = nodes.filter((node) => !node?.archived);
  const archivedNodes = nodes.filter((node) => node?.archived);
  const typeCounts = {};
  for (const node of activeNodes) {
    const type = String(node?.type || "unknown");
    typeCounts[type] = (typeCounts[type] || 0) + 1;
  }
  return {
    nodeCount: nodes.length,
    activeNodeCount: activeNodes.length,
    archivedNodeCount: archivedNodes.length,
    edgeCount: edges.length,
    typeCounts,
    historyState: safeClone(
      {
        chatId: graph?.historyState?.chatId || "",
        extractionCount: Number(graph?.historyState?.extractionCount || 0),
        lastProcessedAssistantFloor: Number(
          graph?.historyState?.lastProcessedAssistantFloor ?? -1,
        ),
        activeRegion: String(graph?.historyState?.activeRegion || ""),
        activeStorySegmentId: String(
          graph?.historyState?.activeStorySegmentId || "",
        ),
        activeStoryTimeLabel: String(
          graph?.historyState?.activeStoryTimeLabel || "",
        ),
        activeRecallOwnerKey: String(
          graph?.historyState?.activeRecallOwnerKey || "",
        ),
        activeRecallOwnerKeys: Array.isArray(
          graph?.historyState?.activeRecallOwnerKeys,
        )
          ? graph.historyState.activeRecallOwnerKeys.map((value) => String(value || ""))
          : [],
        lastRecoveryResult: graph?.historyState?.lastRecoveryResult || null,
      },
      null,
    ),
    vectorIndexState: safeClone(
      {
        mode: String(graph?.vectorIndexState?.mode || ""),
        source: String(graph?.vectorIndexState?.source || ""),
        dirty: Boolean(graph?.vectorIndexState?.dirty),
        dirtyReason: String(graph?.vectorIndexState?.dirtyReason || ""),
        lastWarning: String(graph?.vectorIndexState?.lastWarning || ""),
        collectionId: String(graph?.vectorIndexState?.collectionId || ""),
        indexedCount: Number(
          Object.keys(graph?.vectorIndexState?.hashToNodeId || {}).length || 0,
        ),
      },
      null,
    ),
    summaryState: safeClone(
      {
        enabled: graph?.summaryState?.enabled !== false,
        lastSummarizedExtractionCount: Number(
          graph?.summaryState?.lastSummarizedExtractionCount || 0,
        ),
        lastSummarizedAssistantFloor: Number(
          graph?.summaryState?.lastSummarizedAssistantFloor ?? -1,
        ),
      },
      null,
    ),
  };
}

function readFiniteNumber(value, fallback = 0) {
  const normalized = Number(value);
  return Number.isFinite(normalized) ? normalized : fallback;
}

function buildBaselineDelta(currentValue, previousValue) {
  return readFiniteNumber(currentValue) - readFiniteNumber(previousValue);
}

function buildStatusSnapshot(status = null) {
  if (!status || typeof status !== "object" || Array.isArray(status)) {
    return null;
  }
  return safeClone(
    {
      text: String(status.text || ""),
      meta: truncateText(status.meta || "", 2000),
      level: String(status.level || "idle"),
      updatedAt: Number(status.updatedAt || 0),
    },
    null,
  );
}

export function buildAuthorityPerformanceBaseline({
  chatId = "",
  graphPersistence = null,
  graph = null,
  consistencyAudit = null,
} = {}) {
  const persistence =
    graphPersistence && typeof graphPersistence === "object" && !Array.isArray(graphPersistence)
      ? graphPersistence
      : {};
  const runtimeGraph = graph && typeof graph === "object" && !Array.isArray(graph) ? graph : {};
  const audit =
    consistencyAudit && typeof consistencyAudit === "object" && !Array.isArray(consistencyAudit)
      ? consistencyAudit
      : persistence.authorityConsistencyAudit &&
          typeof persistence.authorityConsistencyAudit === "object" &&
          !Array.isArray(persistence.authorityConsistencyAudit)
        ? persistence.authorityConsistencyAudit
        : null;
  const loadDiagnostics =
    persistence.loadDiagnostics && typeof persistence.loadDiagnostics === "object"
      ? persistence.loadDiagnostics
      : {};
  const persistDelta =
    persistence.persistDelta && typeof persistence.persistDelta === "object"
      ? persistence.persistDelta
      : {};
  const recentJobs = Array.isArray(persistence.authorityRecentJobs)
    ? persistence.authorityRecentJobs
    : [];
  const failedJobs = recentJobs.filter((job) => {
    const queueState = String(job?.queueState || "").trim();
    return queueState === "failed" || queueState === "error";
  });
  const runningJobs = recentJobs.filter(
    (job) => String(job?.queueState || "").trim() === "running",
  );
  const graphRevision = Number(
    runtimeGraph?.meta?.revision || persistence.revision || 0,
  );
  return {
    kind: "authority-performance-baseline",
    capturedAt: new Date().toISOString(),
    chatId: normalizeRecordId(chatId || persistence.chatId || runtimeGraph?.chatId),
    graphRevision: Number.isFinite(graphRevision) ? graphRevision : 0,
    graphNodeCount: Array.isArray(runtimeGraph?.nodes) ? runtimeGraph.nodes.length : 0,
    graphEdgeCount: Array.isArray(runtimeGraph?.edges) ? runtimeGraph.edges.length : 0,
    extractionCount: Number(runtimeGraph?.historyState?.extractionCount || 0),
    load: safeClone(
      {
        state: String(persistence.loadState || ""),
        source: String(loadDiagnostics.source || ""),
        totalMs: Number(loadDiagnostics.totalMs || 0),
        preApplyMs: Number(loadDiagnostics.preApplyMs || 0),
        exportSnapshotMs: Number(loadDiagnostics.exportSnapshotMs || 0),
        hydrateMs: Number(loadDiagnostics.hydrateMs || 0),
        hydrateNativeRecordsMs: Number(loadDiagnostics.hydrateNativeRecordsMs || 0),
        applyRuntimeMs: Number(loadDiagnostics.applyRuntimeMs || 0),
        updatedAt: String(loadDiagnostics.updatedAt || ""),
      },
      null,
    ),
    persist: safeClone(
      {
        totalMs: Number(persistDelta.totalMs || persistDelta.buildMs || 0),
        buildMs: Number(persistDelta.buildMs || 0),
        baseSnapshotReadMs: Number(persistDelta.baseSnapshotReadMs || 0),
        snapshotBuildMs: Number(persistDelta.snapshotBuildMs || 0),
        prepareMs: Number(persistDelta.prepareMs || 0),
        nativeAttemptMs: Number(persistDelta.nativeAttemptMs || 0),
        lookupMs: Number(persistDelta.lookupMs || 0),
        jsDiffMs: Number(persistDelta.jsDiffMs || 0),
        hydrateMs: Number(persistDelta.hydrateMs || 0),
        commitQueueWaitMs: Number(persistDelta.commitQueueWaitMs || 0),
        commitMs: Number(persistDelta.commitMs || 0),
        commitPayloadBytes: Number(persistDelta.commitPayloadBytes || 0),
        commitWalBytes: Number(persistDelta.commitWalBytes || 0),
        updatedAt: String(persistDelta.updatedAt || ""),
      },
      null,
    ),
    soak: {
      recentJobCount: recentJobs.length,
      runningJobCount: runningJobs.length,
      failedJobCount: failedJobs.length,
      lastJobId: String(persistence.authorityLastJobId || ""),
      lastJobStatus: String(persistence.authorityLastJobStatus || ""),
      lastJobUpdatedAt: String(persistence.authorityLastJobUpdatedAt || ""),
    },
    audit: safeClone(
      {
        state: String(persistence.authorityConsistencyState || audit?.summary?.level || "idle"),
        issueCount: Array.isArray(audit?.issues) ? audit.issues.length : 0,
        sqlRevision: Number(audit?.sql?.revision || 0),
        triviumRevision: Number(audit?.trivium?.revision || 0),
        blobRevision: Number(
          audit?.blob?.revision || persistence.authorityBlobCheckpointRevision || 0,
        ),
      },
      null,
    ),
    artifacts: safeClone(
      {
        diagnosticsBundlePath: String(persistence.authorityDiagnosticsBundlePath || ""),
        diagnosticsBundleReason: String(persistence.authorityDiagnosticsBundleReason || ""),
        diagnosticsBundleUpdatedAt: String(
          persistence.authorityDiagnosticsBundleUpdatedAt || "",
        ),
        diagnosticsBundleSize: Number(persistence.authorityDiagnosticsBundleSize || 0),
        blobCheckpointPath: String(persistence.authorityBlobCheckpointPath || ""),
        blobCheckpointRevision: Number(persistence.authorityBlobCheckpointRevision || 0),
        blobCheckpointUpdatedAt: String(
          persistence.authorityBlobCheckpointUpdatedAt || "",
        ),
      },
      null,
    ),
  };
}

export function buildAuthorityPerformanceBaselineComparison(previousBaseline = null, currentBaseline = null) {
  const previous =
    previousBaseline && typeof previousBaseline === "object" && !Array.isArray(previousBaseline)
      ? previousBaseline
      : null;
  const current =
    currentBaseline && typeof currentBaseline === "object" && !Array.isArray(currentBaseline)
      ? currentBaseline
      : null;
  if (!previous || !current) {
    return null;
  }
  return {
    kind: "authority-performance-baseline-comparison",
    chatId: normalizeRecordId(current.chatId || previous.chatId),
    previousCapturedAt: String(previous.capturedAt || ""),
    currentCapturedAt: String(current.capturedAt || ""),
    previousGraphRevision: readFiniteNumber(previous.graphRevision),
    currentGraphRevision: readFiniteNumber(current.graphRevision),
    deltaGraphRevision: buildBaselineDelta(current.graphRevision, previous.graphRevision),
    deltaNodeCount: buildBaselineDelta(current.graphNodeCount, previous.graphNodeCount),
    deltaEdgeCount: buildBaselineDelta(current.graphEdgeCount, previous.graphEdgeCount),
    deltaExtractionCount: buildBaselineDelta(current.extractionCount, previous.extractionCount),
    load: safeClone(
      {
        totalMs: buildBaselineDelta(current.load?.totalMs, previous.load?.totalMs),
        preApplyMs: buildBaselineDelta(current.load?.preApplyMs, previous.load?.preApplyMs),
        hydrateMs: buildBaselineDelta(current.load?.hydrateMs, previous.load?.hydrateMs),
        hydrateNativeRecordsMs: buildBaselineDelta(
          current.load?.hydrateNativeRecordsMs,
          previous.load?.hydrateNativeRecordsMs,
        ),
        applyRuntimeMs: buildBaselineDelta(
          current.load?.applyRuntimeMs,
          previous.load?.applyRuntimeMs,
        ),
      },
      null,
    ),
    persist: safeClone(
      {
        totalMs: buildBaselineDelta(current.persist?.totalMs, previous.persist?.totalMs),
        buildMs: buildBaselineDelta(current.persist?.buildMs, previous.persist?.buildMs),
        snapshotBuildMs: buildBaselineDelta(
          current.persist?.snapshotBuildMs,
          previous.persist?.snapshotBuildMs,
        ),
        commitQueueWaitMs: buildBaselineDelta(
          current.persist?.commitQueueWaitMs,
          previous.persist?.commitQueueWaitMs,
        ),
        commitMs: buildBaselineDelta(current.persist?.commitMs, previous.persist?.commitMs),
        commitPayloadBytes: buildBaselineDelta(
          current.persist?.commitPayloadBytes,
          previous.persist?.commitPayloadBytes,
        ),
        commitWalBytes: buildBaselineDelta(
          current.persist?.commitWalBytes,
          previous.persist?.commitWalBytes,
        ),
      },
      null,
    ),
    soak: safeClone(
      {
        recentJobCount: buildBaselineDelta(
          current.soak?.recentJobCount,
          previous.soak?.recentJobCount,
        ),
        runningJobCount: buildBaselineDelta(
          current.soak?.runningJobCount,
          previous.soak?.runningJobCount,
        ),
        failedJobCount: buildBaselineDelta(
          current.soak?.failedJobCount,
          previous.soak?.failedJobCount,
        ),
      },
      null,
    ),
  };
}

export function sanitizeDiagnosticsSettings(settings = {}) {
  return sanitizeValue(settings, "settings", 0);
}

export function buildAuthorityDiagnosticsBundlePath(chatId = "", reason = "diagnostics") {
  const normalizedChatId = normalizeRecordId(chatId);
  const safeChatId = buildSafeSlug(normalizedChatId || "global");
  const safeReason = buildSafeSlug(reason || "diagnostics", "diagnostics");
  const hash = buildHash(`${normalizedChatId}:${safeReason}`);
  const timestamp = buildCompactTimestamp(new Date());
  return `user/files/ST-BME_diagnostics_${safeChatId}-${safeReason}-${hash}-${timestamp}.json`;
}

function normalizeIsoTimestamp(value = "") {
  const text = String(value || "").trim();
  if (!text) return "";
  const date = new Date(text);
  return Number.isNaN(date.getTime()) ? "" : date.toISOString();
}

function normalizeManifestLimit(value, fallback = AUTHORITY_DIAGNOSTICS_MANIFEST_LIMIT) {
  const parsed = Number(value);
  if (!Number.isFinite(parsed) || parsed < 1) return fallback;
  return Math.max(1, Math.trunc(parsed));
}

export function buildAuthorityDiagnosticsManifestPath(chatId = "") {
  const normalizedChatId = normalizeRecordId(chatId);
  const safeChatId = buildSafeSlug(normalizedChatId || "global");
  const hash = buildHash(`${normalizedChatId}:diagnostics-manifest`);
  return `user/files/ST-BME_diagnostics_manifest_${safeChatId}-${hash}.json`;
}

export function normalizeAuthorityDiagnosticsArtifactRecord(record = null) {
  if (!record || typeof record !== "object" || Array.isArray(record)) {
    return null;
  }
  const path = normalizeRecordId(record.path);
  if (!path) return null;
  const createdAt =
    normalizeIsoTimestamp(record.createdAt) || normalizeIsoTimestamp(record.updatedAt);
  const updatedAt =
    normalizeIsoTimestamp(record.updatedAt) || createdAt || new Date().toISOString();
  return {
    kind: "diagnostics-bundle",
    chatId: normalizeRecordId(record.chatId),
    path,
    reason: String(record.reason || "diagnostics-bundle"),
    size: Math.max(0, Number(record.size || 0) || 0),
    bundleVersion: Math.max(1, Number(record.bundleVersion || 1) || 1),
    createdAt: createdAt || updatedAt,
    updatedAt,
  };
}

function buildAuthorityDiagnosticsManifestEntries(entries = [], limit = AUTHORITY_DIAGNOSTICS_MANIFEST_LIMIT) {
  const normalizedEntries = [];
  const seenPaths = new Set();
  for (const entry of Array.isArray(entries) ? entries : []) {
    const normalized = normalizeAuthorityDiagnosticsArtifactRecord(entry);
    if (!normalized || seenPaths.has(normalized.path)) continue;
    seenPaths.add(normalized.path);
    normalizedEntries.push(normalized);
  }
  normalizedEntries.sort((left, right) => {
    const leftTime = Date.parse(left.updatedAt || left.createdAt || 0) || 0;
    const rightTime = Date.parse(right.updatedAt || right.createdAt || 0) || 0;
    if (rightTime !== leftTime) return rightTime - leftTime;
    return String(left.path).localeCompare(String(right.path));
  });
  return normalizedEntries.slice(0, normalizeManifestLimit(limit));
}

function buildAuthorityDiagnosticsPrunedEntries(previousEntries = [], nextEntries = []) {
  const normalizedPreviousEntries = buildAuthorityDiagnosticsManifestEntries(
    previousEntries,
    Number.MAX_SAFE_INTEGER,
  );
  const keptPaths = new Set(
    buildAuthorityDiagnosticsManifestEntries(nextEntries, Number.MAX_SAFE_INTEGER).map(
      (entry) => entry.path,
    ),
  );
  return normalizedPreviousEntries.filter((entry) => !keptPaths.has(entry.path));
}

function normalizeAuthorityDiagnosticsManifest(manifest = null, options = {}) {
  const source = manifest && typeof manifest === "object" && !Array.isArray(manifest) ? manifest : {};
  const chatId = normalizeRecordId(options.chatId || source.chatId);
  const entries = buildAuthorityDiagnosticsManifestEntries(
    source.entries,
    options.limit,
  );
  const updatedAt =
    normalizeIsoTimestamp(options.updatedAt || source.updatedAt) ||
    entries[0]?.updatedAt ||
    new Date().toISOString();
  return {
    kind: "st-bme-authority-diagnostics-manifest",
    version: AUTHORITY_DIAGNOSTICS_MANIFEST_VERSION,
    chatId,
    updatedAt,
    entries,
  };
}

export async function readAuthorityDiagnosticsManifest(adapter, options = {}) {
  if (!adapter || typeof adapter.readJson !== "function") {
    throw new Error("Authority diagnostics adapter unavailable");
  }
  const chatId = normalizeRecordId(options.chatId);
  const path = String(options.path || buildAuthorityDiagnosticsManifestPath(chatId));
  const result = await adapter.readJson(path, {
    signal: options.signal,
  });
  if (!result?.exists || !result?.payload) {
    const manifest = normalizeAuthorityDiagnosticsManifest(null, {
      chatId,
      updatedAt: options.updatedAt,
      limit: options.limit,
    });
    return {
      ok: true,
      exists: false,
      path,
      entries: manifest.entries,
      manifest,
      result,
    };
  }
  const manifest = normalizeAuthorityDiagnosticsManifest(result.payload, {
    chatId,
    updatedAt: options.updatedAt,
    limit: options.limit,
  });
  return {
    ok: true,
    exists: true,
    path,
    entries: manifest.entries,
    manifest,
    result,
  };
}

export async function writeAuthorityDiagnosticsManifest(adapter, manifest = null, options = {}) {
  if (!adapter || typeof adapter.writeJson !== "function") {
    throw new Error("Authority diagnostics adapter unavailable");
  }
  const chatId = normalizeRecordId(options.chatId || manifest?.chatId);
  const path = String(options.path || buildAuthorityDiagnosticsManifestPath(chatId));
  const normalizedManifest = normalizeAuthorityDiagnosticsManifest(manifest, {
    chatId,
    updatedAt: options.updatedAt,
    limit: options.limit,
  });
  const result = await adapter.writeJson(path, normalizedManifest, {
    signal: options.signal,
    metadata: safeClone(
      {
        chatId,
        kind: "diagnostics-manifest",
        entryCount: normalizedManifest.entries.length,
        updatedAt: normalizedManifest.updatedAt,
      },
      {},
    ),
  });
  return {
    ok: result?.ok !== false,
    path: String(result?.path || path),
    manifest: normalizedManifest,
    entries: normalizedManifest.entries,
    result,
  };
}

export async function upsertAuthorityDiagnosticsManifestEntry(adapter, entry = null, options = {}) {
  const normalizedEntry = normalizeAuthorityDiagnosticsArtifactRecord(entry);
  if (!normalizedEntry) {
    throw new Error("Authority diagnostics artifact entry unavailable");
  }
  const current = await readAuthorityDiagnosticsManifest(adapter, {
    chatId: options.chatId || normalizedEntry.chatId,
    path: options.path,
    signal: options.signal,
    limit: options.limit,
  });
  const candidateEntries = [
    normalizedEntry,
    ...current.entries.filter((item) => item.path !== normalizedEntry.path),
  ];
  const entries = buildAuthorityDiagnosticsManifestEntries(candidateEntries, options.limit);
  const prunedEntries = buildAuthorityDiagnosticsPrunedEntries(candidateEntries, entries);
  const writeResult = await writeAuthorityDiagnosticsManifest(
    adapter,
    {
      ...current.manifest,
      chatId:
        normalizeRecordId(options.chatId || normalizedEntry.chatId || current.manifest?.chatId),
      updatedAt: normalizedEntry.updatedAt || new Date().toISOString(),
      entries,
    },
    {
      chatId: options.chatId || normalizedEntry.chatId,
      path: current.path,
      signal: options.signal,
      limit: options.limit,
    },
  );
  return {
    ...writeResult,
    entry: normalizedEntry,
    prunedEntries,
  };
}

export async function removeAuthorityDiagnosticsManifestEntry(adapter, artifactPath = "", options = {}) {
  const normalizedPath = normalizeRecordId(artifactPath);
  if (!normalizedPath) {
    throw new Error("Authority diagnostics artifact path is required");
  }
  const current = await readAuthorityDiagnosticsManifest(adapter, {
    chatId: options.chatId,
    path: options.path,
    signal: options.signal,
    limit: options.limit,
  });
  const entries = current.entries.filter((entry) => entry.path !== normalizedPath);
  const removed = entries.length !== current.entries.length;
  const writeResult = await writeAuthorityDiagnosticsManifest(
    adapter,
    {
      ...current.manifest,
      updatedAt: options.updatedAt || new Date().toISOString(),
      entries,
    },
    {
      chatId: options.chatId || current.manifest?.chatId,
      path: current.path,
      signal: options.signal,
      limit: options.limit,
    },
  );
  return {
    ...writeResult,
    removed,
  };
}

export function buildAuthorityDiagnosticsBundle({
  chatId = "",
  reason = "diagnostics-bundle",
  settings = {},
  runtimeStatus = null,
  runtimeDebug = null,
  graphPersistence = null,
  graph = null,
  lastExtractionStatus = null,
  lastVectorStatus = null,
  lastRecallStatus = null,
  lastBatchStatus = null,
  lastInjection = "",
  lastExtract = [],
  lastRecall = [],
  performanceBaseline = null,
  performanceBaselineComparison = null,
} = {}) {
  const createdAt = new Date().toISOString();
  return {
    kind: "st-bme-authority-diagnostics",
    bundleVersion: 1,
    createdAt,
    chatId: normalizeRecordId(chatId),
    reason: String(reason || "diagnostics-bundle"),
    settings: sanitizeDiagnosticsSettings(settings || {}),
    runtimeStatus: buildStatusSnapshot(runtimeStatus),
    runtimeDebug: safeClone(runtimeDebug, null),
    graphPersistence: safeClone(graphPersistence, null),
    graphSummary: buildGraphSummary(graph),
    performanceBaseline: safeClone(performanceBaseline, null),
    performanceBaselineComparison: safeClone(performanceBaselineComparison, null),
    lastStatuses: {
      extraction: buildStatusSnapshot(lastExtractionStatus),
      vector: buildStatusSnapshot(lastVectorStatus),
      recall: buildStatusSnapshot(lastRecallStatus),
      batch: safeClone(lastBatchStatus, null),
    },
    lastInjection: {
      textPreview: truncateText(lastInjection, 4000),
      textLength: String(lastInjection || "").length,
    },
    recentExtractedItems: safeClone(
      (Array.isArray(lastExtract) ? lastExtract : []).slice(0, 20),
      [],
    ),
    recentRecalledItems: safeClone(
      (Array.isArray(lastRecall) ? lastRecall : []).slice(0, 20),
      [],
    ),
  };
}

export async function writeAuthorityDiagnosticsBundle(adapter, bundle = null, options = {}) {
  if (!adapter || typeof adapter.writeJson !== "function") {
    throw new Error("Authority diagnostics adapter unavailable");
  }
  const chatId = normalizeRecordId(options.chatId || bundle?.chatId);
  const reason = String(options.reason || bundle?.reason || "diagnostics-bundle");
  const path =
    options.path || buildAuthorityDiagnosticsBundlePath(chatId, reason);
  const result = await adapter.writeJson(path, safeClone(bundle, bundle), {
    signal: options.signal,
    metadata: safeClone(
      {
        chatId,
        reason,
        kind: "diagnostics-bundle",
        bundleVersion: Number(bundle?.bundleVersion || 1),
        createdAt: bundle?.createdAt || new Date().toISOString(),
      },
      {},
    ),
  });
  return {
    ok: result?.ok !== false,
    path: String(result?.path || path),
    result,
  };
}