diff --git a/src/__tests__/code-ingest.test.ts b/src/__tests__/code-ingest.test.ts
index b316465..463ffbd 100644
--- a/src/__tests__/code-ingest.test.ts
+++ b/src/__tests__/code-ingest.test.ts
@@ -349,4 +349,30 @@ describe('packAnalysisUnits', () => {
     expect(text).toContain('risk signals:');
     expect(text).toContain('requests.get(url)'); // body included
   });
+
+  it('redacts source secrets before producing LLM-facing context', () => {
+    const blocks = parseFile('secrets.py', `def leak():\n    api_key = "sk-ant-api03-ABCDEFGHIJKLMNOP"\n    return "Authorization: Bearer abcdefghijklmnop"\n`);
+    const block = blocks[0];
+    if (!block) throw new Error('expected parseFile to return a block');
+    const unit: AnalysisUnit = {
+      block,
+      exposure: 'neutral',
+      callers: [],
+      callees: [],
+      reachable: false,
+      reachDepth: Infinity,
+      reachabilityPaths: [],
+      riskSignals: [],
+      priority: 0,
+    };
+
+    const formatted = formatUnitForLLM(unit);
+    const packed = packAnalysisUnits([unit], 100_000).text;
+
+    for (const text of [formatted, packed]) {
+      expect(text).not.toContain('sk-ant-api03-ABCDEFGHIJKLMNOP');
+      expect(text).not.toContain('Bearer abcdefghijklmnop');
+      expect(text).toContain('[redacted]');
+    }
+  });
 });
diff --git a/src/recon/code-ingest.ts b/src/recon/code-ingest.ts
index ec8d394..be9ca8b 100644
--- a/src/recon/code-ingest.ts
+++ b/src/recon/code-ingest.ts
@@ -43,6 +43,7 @@ import {
   type SourceFile,
   type SourceBundle,
 } from '../orchestration/context-pack.js';
+import { redactString } from '../redact.js';
 
 // =============================================================================
 // TYPES
@@ -861,7 +862,7 @@ export function formatUnitForLLM(unit: AnalysisUnit): string {
     `risk signals: ${unit.riskSignals.length ? unit.riskSignals.join(', ') : '(none)'}`,
   );
   lines.push('---');
-  lines.push(b.body);
+  lines.push(redactString(b.body));
   return lines.join('\n');
 }