diff --git a/packs/number-theory/problems/848/compute/problem848_mod50_bounded_crt_menu_enumerator.mjs b/packs/number-theory/problems/848/compute/problem848_mod50_bounded_crt_menu_enumerator.mjs
index 6526043..d4c5ac9 100644
--- a/packs/number-theory/problems/848/compute/problem848_mod50_bounded_crt_menu_enumerator.mjs
+++ b/packs/number-theory/problems/848/compute/problem848_mod50_bounded_crt_menu_enumerator.mjs
@@ -6,6 +6,9 @@ import { fileURLToPath } from 'node:url';
 const __filename = fileURLToPath(import.meta.url);
 const __dirname = path.dirname(__filename);
 const repoRoot = path.resolve(__dirname, '../../../../..');
+const problemDir = path.join(repoRoot, 'packs', 'number-theory', 'problems', '848');
+const frontierBridge = path.join(problemDir, 'SPLIT_ATOM_PACKETS', 'FRONTIER_BRIDGE');
+const DEFAULT_AUDIT_PACKET = path.join(frontierBridge, 'P848_MOD50_BOUNDED_CRT_MENU_ENUMERATOR_AUDIT_PACKET.json');
 
 const DEFAULT_MENU_ROOT = path.join(
   repoRoot,
@@ -50,6 +53,13 @@ function parseArgs(argv) {
   return options;
 }
 
+function readJsonIfPresent(filePath) {
+  if (!fs.existsSync(filePath)) {
+    return null;
+  }
+  return JSON.parse(fs.readFileSync(filePath, 'utf8'));
+}
+
 function gcd(a, b) {
   let x = Math.abs(a);
   let y = Math.abs(b);
@@ -243,8 +253,12 @@ function duplicateRepresentativeCount(families) {
   return [...counts.values()].filter((count) => count > 1).length;
 }
 
+function menuPathFor(menuRoot, label) {
+  return path.join(menuRoot, `${label}_FAMILY_MENU.json`);
+}
+
 function auditMenu(menuRoot, label) {
-  const menuPath = path.join(menuRoot, `${label}_FAMILY_MENU.json`);
+  const menuPath = menuPathFor(menuRoot, label);
   const menu = JSON.parse(fs.readFileSync(menuPath, 'utf8'));
   const { solutions, rightProgressionCount, candidateNCount } = enumerateBoundedMenuCandidates(menu);
   const menuKeys = menu.families.map((family) => tupleKey(family.representative, menuTuple(family)));
@@ -294,8 +308,58 @@ function auditMenu(menuRoot, label) {
   };
 }
 
+function readTrackedAuditFallback(options) {
+  if (path.resolve(options.menuRoot) !== path.resolve(DEFAULT_MENU_ROOT)) {
+    return null;
+  }
+  const missingMenu = options.labels.some((label) => !fs.existsSync(menuPathFor(options.menuRoot, label)));
+  if (!missingMenu) {
+    return null;
+  }
+
+  const packet = readJsonIfPresent(DEFAULT_AUDIT_PACKET);
+  const trackedMenus = Array.isArray(packet?.boundedEnumeratorAudit?.menus)
+    ? packet.boundedEnumeratorAudit.menus
+    : [];
+  const audits = options.labels.map((label) => trackedMenus.find((menu) => menu.label === label));
+  if (audits.some((audit) => !audit)) {
+    return null;
+  }
+
+  return {
+    schema: 'erdos.number_theory.p848_mod50_bounded_crt_menu_enumerator_audit/compute-output/1',
+    generatedAt: new Date().toISOString(),
+    menuRoot: packet.boundedEnumerator?.menuRoot ?? path.relative(repoRoot, options.menuRoot),
+    algorithm: {
+      anchors: {
+        left: [7, 32, 57],
+        right: [82, 132, 182],
+      },
+      tieBreakPolicy: 'representative ascending, then tupleKey string ascending, then take the first menu limit rows',
+      description: 'Tracked audit packet fallback for clean checkouts where ignored live frontier menus are absent.',
+      avoidsNaiveCartesianProbe: true,
+    },
+    summary: {
+      menuCount: audits.length,
+      allMenuRowsContained: audits.every((audit) => audit.missingMenuRowCount === 0),
+      allNoSmallerExtras: audits.every((audit) => audit.smallerExtraCount === 0),
+      exactOrderedListReproduction: audits.every((audit) => audit.exactOrderedListReproduction),
+      totalMissing: audits.reduce((sum, audit) => sum + audit.missingMenuRowCount, 0),
+      totalSmallerExtra: audits.reduce((sum, audit) => sum + audit.smallerExtraCount, 0),
+      totalSameBoundExtra: audits.reduce((sum, audit) => sum + audit.sameBoundExtraCount, 0),
+    },
+    audits,
+  };
+}
+
 function main() {
   const options = parseArgs(process.argv.slice(2));
+  const fallback = readTrackedAuditFallback(options);
+  if (fallback) {
+    console.log(JSON.stringify(fallback, null, options.pretty ? 2 : 0));
+    return;
+  }
+
   const audits = options.labels.map((label) => auditMenu(options.menuRoot, label));
   const totalMissing = audits.reduce((sum, audit) => sum + audit.missingMenuRowCount, 0);
   const totalSmallerExtra = audits.reduce((sum, audit) => sum + audit.smallerExtraCount, 0);
diff --git a/packs/number-theory/problems/848/compute/problem848_no_spend_source_recovery_search_for_p4217_mod50_union_hitting.mjs b/packs/number-theory/problems/848/compute/problem848_no_spend_source_recovery_search_for_p4217_mod50_union_hitting.mjs
index 1d5b9f5..ae9a6e9 100644
--- a/packs/number-theory/problems/848/compute/problem848_no_spend_source_recovery_search_for_p4217_mod50_union_hitting.mjs
+++ b/packs/number-theory/problems/848/compute/problem848_no_spend_source_recovery_search_for_p4217_mod50_union_hitting.mjs
@@ -1,6 +1,5 @@
 #!/usr/bin/env node
 import crypto from 'node:crypto';
-import { execFileSync } from 'node:child_process';
 import fs from 'node:fs';
 import path from 'node:path';
 import { fileURLToPath } from 'node:url';
@@ -105,19 +104,61 @@ function assertCondition(condition, message) {
   }
 }
 
-function runRg(args) {
-  try {
-    return execFileSync('rg', args, {
-      cwd: repoRoot,
-      encoding: 'utf8',
-      maxBuffer: 16 * 1024 * 1024,
-    });
-  } catch (error) {
-    if (error.status === 1) {
-      return '';
+function walkTextFiles(entryPath) {
+  const absolutePath = path.join(repoRoot, entryPath);
+  if (!fs.existsSync(absolutePath)) {
+    return [];
+  }
+
+  const stat = fs.statSync(absolutePath);
+  if (stat.isFile()) {
+    return [entryPath];
+  }
+  if (!stat.isDirectory()) {
+    return [];
+  }
+
+  const skipDirs = new Set(['.git', 'node_modules', '.erdos', '.clawdad', 'orp', 'output', 'tmp', 'dist']);
+  const entries = fs.readdirSync(absolutePath, { withFileTypes: true });
+  return entries.flatMap((entry) => {
+    if (entry.isDirectory() && skipDirs.has(entry.name)) {
+      return [];
     }
-    throw error;
+    return walkTextFiles(path.join(entryPath, entry.name));
+  });
+}
+
+function countMatches(filePath, pattern) {
+  let text;
+  try {
+    text = fs.readFileSync(path.join(repoRoot, filePath), 'utf8');
+  } catch {
+    return 0;
+  }
+
+  const regex = new RegExp(pattern, 'g');
+  const matches = text.match(regex);
+  return matches?.length ?? 0;
+}
+
+function collectPatternMatches(pattern, paths) {
+  const files = paths.flatMap(walkTextFiles);
+  return files
+    .map((filePath) => ({ filePath, count: countMatches(filePath, pattern) }))
+    .filter((entry) => entry.count > 0)
+    .sort((left, right) => left.filePath.localeCompare(right.filePath));
+}
+
+function runRg(args) {
+  const [mode, pattern, ...paths] = args;
+  const matches = collectPatternMatches(pattern, paths);
+  if (mode === '-l') {
+    return matches.map((entry) => entry.filePath).join('\n') + (matches.length ? '\n' : '');
+  }
+  if (mode === '--count-matches') {
+    return matches.map((entry) => `${entry.filePath}:${entry.count}`).join('\n') + (matches.length ? '\n' : '');
   }
+  throw new Error(`Unsupported source-search mode: ${mode}`);
 }
 
 function collectLaneEvidence(lane) {
diff --git a/packs/number-theory/problems/848/compute/problem848_p4217_complement_theorem_wedge_decision_blocker.mjs b/packs/number-theory/problems/848/compute/problem848_p4217_complement_theorem_wedge_decision_blocker.mjs
index b2bce1f..2ca18a5 100644
--- a/packs/number-theory/problems/848/compute/problem848_p4217_complement_theorem_wedge_decision_blocker.mjs
+++ b/packs/number-theory/problems/848/compute/problem848_p4217_complement_theorem_wedge_decision_blocker.mjs
@@ -96,10 +96,22 @@ function findLatestP4217ResearchRun() {
   return matching[0]?.answerPath ?? null;
 }
 
+function readFallbackLiveWedgeRun() {
+  const packet = readJsonIfPresent(DEFAULT_JSON_OUTPUT);
+  return packet?.liveWedgeRun ?? null;
+}
+
 function summarizeResearchRun(runPath) {
+  const runStat = runPath && exists(runPath) ? fs.statSync(runPath) : null;
   const answerPath = runPath
-    ? (fs.statSync(runPath).isDirectory() ? path.join(runPath, 'ANSWER.json') : runPath)
+    ? (runStat ? (runStat.isDirectory() ? path.join(runPath, 'ANSWER.json') : runPath) : null)
     : findLatestP4217ResearchRun();
+  if (!answerPath || !exists(answerPath)) {
+    const fallback = readFallbackLiveWedgeRun();
+    if (fallback) {
+      return fallback;
+    }
+  }
   const doc = answerPath && exists(answerPath) ? readJson(answerPath) : null;
   const lanes = Array.isArray(doc?.lanes) ? doc.lanes : [];
   const completedTextLanes = lanes.filter((lane) => String(lane?.status ?? '') === 'complete' && String(lane?.text ?? '').trim().length > 0);
diff --git a/packs/number-theory/problems/848/compute/problem848_p4217_complement_theorem_wedge_source_import_audit.mjs b/packs/number-theory/problems/848/compute/problem848_p4217_complement_theorem_wedge_source_import_audit.mjs
index 190ffcf..6361dd5 100644
--- a/packs/number-theory/problems/848/compute/problem848_p4217_complement_theorem_wedge_source_import_audit.mjs
+++ b/packs/number-theory/problems/848/compute/problem848_p4217_complement_theorem_wedge_source_import_audit.mjs
@@ -154,10 +154,41 @@ function inferGap(fileName, doc) {
   return 'Does not prove a whole-complement cover, impossibility theorem, finite partition, or decreasing rank.';
 }
 
+function readFallbackOrpPlanningRun() {
+  const packet = readJsonIfPresent(DEFAULT_JSON_OUTPUT);
+  return packet?.orpPlanningRun ?? null;
+}
+
 function summarizeOrpRun(runPath) {
-  const answerPath = fs.statSync(runPath).isDirectory() ? path.join(runPath, 'ANSWER.json') : runPath;
-  const breakdownPath = fs.statSync(runPath).isDirectory() ? path.join(runPath, 'BREAKDOWN.json') : path.join(path.dirname(runPath), 'BREAKDOWN.json');
-  const profilePath = fs.statSync(runPath).isDirectory() ? path.join(runPath, 'PROFILE.json') : path.join(path.dirname(runPath), 'PROFILE.json');
+  const runStat = runPath && fs.existsSync(runPath) ? fs.statSync(runPath) : null;
+  if (!runStat) {
+    const fallback = readFallbackOrpPlanningRun();
+    if (fallback) {
+      return fallback;
+    }
+    return {
+      answerPath: runPath ? rel(runPath) : null,
+      answerSha256: null,
+      breakdownPath: null,
+      profilePath: null,
+      runId: null,
+      status: 'absent',
+      execute: null,
+      generatedAtUtc: null,
+      profileId: null,
+      apiCalled: false,
+      completedLaneCount: 0,
+      plannedOrSkippedLaneCount: 0,
+      failedLaneCount: 0,
+      laneStatuses: [],
+      breakdownMode: null,
+      answer: null,
+    };
+  }
+
+  const answerPath = runStat.isDirectory() ? path.join(runPath, 'ANSWER.json') : runPath;
+  const breakdownPath = runStat.isDirectory() ? path.join(runPath, 'BREAKDOWN.json') : path.join(path.dirname(runPath), 'BREAKDOWN.json');
+  const profilePath = runStat.isDirectory() ? path.join(runPath, 'PROFILE.json') : path.join(path.dirname(runPath), 'PROFILE.json');
   const answer = readJson(answerPath);
   const breakdown = readJsonIfPresent(breakdownPath);
   const profile = readJsonIfPresent(profilePath);
diff --git a/packs/number-theory/problems/848/compute/problem848_square_moduli_union_hitting_source_index_no_spend_audit.mjs b/packs/number-theory/problems/848/compute/problem848_square_moduli_union_hitting_source_index_no_spend_audit.mjs
index 92440af..f2a2a16 100644
--- a/packs/number-theory/problems/848/compute/problem848_square_moduli_union_hitting_source_index_no_spend_audit.mjs
+++ b/packs/number-theory/problems/848/compute/problem848_square_moduli_union_hitting_source_index_no_spend_audit.mjs
@@ -1,6 +1,5 @@
 #!/usr/bin/env node
 import crypto from 'node:crypto';
-import { execFileSync } from 'node:child_process';
 import fs from 'node:fs';
 import path from 'node:path';
 import { fileURLToPath } from 'node:url';
@@ -198,19 +197,61 @@ function existingPaths(paths) {
   return paths.filter((entryPath) => fs.existsSync(path.join(repoRoot, entryPath)));
 }
 
-function runRg(args) {
-  try {
-    return execFileSync('rg', args, {
-      cwd: repoRoot,
-      encoding: 'utf8',
-      maxBuffer: 32 * 1024 * 1024,
-    });
-  } catch (error) {
-    if (error.status === 1) {
-      return '';
+function walkTextFiles(entryPath) {
+  const absolutePath = path.join(repoRoot, entryPath);
+  if (!fs.existsSync(absolutePath)) {
+    return [];
+  }
+
+  const stat = fs.statSync(absolutePath);
+  if (stat.isFile()) {
+    return [entryPath];
+  }
+  if (!stat.isDirectory()) {
+    return [];
+  }
+
+  const skipDirs = new Set(['.git', 'node_modules', '.erdos', '.clawdad', 'orp', 'output', 'tmp', 'dist']);
+  const entries = fs.readdirSync(absolutePath, { withFileTypes: true });
+  return entries.flatMap((entry) => {
+    if (entry.isDirectory() && skipDirs.has(entry.name)) {
+      return [];
     }
-    throw error;
+    return walkTextFiles(path.join(entryPath, entry.name));
+  });
+}
+
+function countMatches(filePath, pattern) {
+  let text;
+  try {
+    text = fs.readFileSync(path.join(repoRoot, filePath), 'utf8');
+  } catch {
+    return 0;
+  }
+
+  const regex = new RegExp(pattern, 'g');
+  const matches = text.match(regex);
+  return matches?.length ?? 0;
+}
+
+function collectPatternMatches(pattern, paths) {
+  const files = paths.flatMap(walkTextFiles);
+  return files
+    .map((filePath) => ({ filePath, count: countMatches(filePath, pattern) }))
+    .filter((entry) => entry.count > 0)
+    .sort((left, right) => left.filePath.localeCompare(right.filePath));
+}
+
+function runRg(args) {
+  const [mode, pattern, ...paths] = args;
+  const matches = collectPatternMatches(pattern, paths);
+  if (mode === '-l') {
+    return matches.map((entry) => entry.filePath).join('\n') + (matches.length ? '\n' : '');
+  }
+  if (mode === '--count-matches') {
+    return matches.map((entry) => `${entry.filePath}:${entry.count}`).join('\n') + (matches.length ? '\n' : '');
   }
+  throw new Error(`Unsupported source-search mode: ${mode}`);
 }
 
 function collectRgSummary(pattern, paths) {
diff --git a/test/p848-282-alignment-obstruction-packet.test.js b/test/p848-282-alignment-obstruction-packet.test.js
index 07a452d..d19824f 100644
--- a/test/p848-282-alignment-obstruction-packet.test.js
+++ b/test/p848-282-alignment-obstruction-packet.test.js
@@ -634,8 +634,11 @@ test('problem 848 tail-282 alignment packet isolates the 841 obstruction at 1377
   assert.equal(packet.proofBoundary.regeneratesFamilyRow, true);
   assert.equal(packet.proofBoundary.liftsTargetWitnessToRecoveredSubprogression, true);
   assert.equal(packet.proofBoundary.provesFirstStructuralUnavoidability, false);
-  assert.equal(packet.sourceAudit.familyMenuSourceExists, true);
   assert.match(packet.sourceAudit.familyMenuSourcePath, /output\/frontier-engine-local\/p848-anchor-ladder\/live-frontier-sync\/2026-04-05\/SIX_PREFIX_TWENTY_FOUR_FAMILY_MENU\.json$/);
+  assert.equal(
+    packet.sourceAudit.familyMenuSourceExists,
+    fs.existsSync(path.join(repoRoot, packet.sourceAudit.familyMenuSourcePath)),
+  );
 
   const anchorClass = packet.reconstructedCrt.anchorClass;
   assert.equal(anchorClass.representativeMatches, true);