diff --git a/src/detection/rules/mcp.rules.ts b/src/detection/rules/mcp.rules.ts
index 5af74df..60992a4 100644
--- a/src/detection/rules/mcp.rules.ts
+++ b/src/detection/rules/mcp.rules.ts
@@ -2,6 +2,13 @@
  * MCP (Model Context Protocol) tool poisoning patterns.
  * Detects attempts to inject malicious instructions via tool descriptions,
  * metadata, or response manipulation in MCP tool calls.
+ *
+ * Updated 2026-03-31: Added rules based on Claude Code npm source map leak
+ * (Anthropic's Bun bundler included .map files in @anthropic-ai/claude-code)
+ * Leaked: ~40 tool names, multi-agent spawning mechanism, Coordinator mode,
+ * KAIROS persistent assistant, BUDDY, ULTRAPLAN internals.
+ * Source: github.com/Kuberwastaken/claude-code, dev.to/gabrielanhaia/...
+ * MITRE ATLAS: AML.T0062 (Agent Tool Invocation), AML.T0051 (Prompt Injection → Tool Abuse)
  */
 
 import type { InjectionRule } from './base.rules'
@@ -62,4 +69,48 @@ export const rules: readonly InjectionRule[] = [
     category: 'mcp_poisoning',
     enabled: true,
   },
+
+  // ── Rules added 2026-03-31 (Claude Code source map leak) ──────────────────
+  // Attackers now know exact Claude Code tool names → can craft targeted injections
+
+  {
+    id: 'mcp-007',
+    // Coordinator Mode and KAIROS are now known — detect attempts to invoke/abuse them
+    pattern: /\b(coordinator[\s_-]mode|kairos[\s_-]?(assistant|mode)?|ultraplan|spawn[\s_-]agent)\b/i,
+    phase: 'command_and_control',
+    confidence: 0.88,
+    description: 'Claude Code internal mode invocation: coordinator/KAIROS/ULTRAPLAN — leaked internals abuse attempt',
+    category: 'mcp_poisoning',
+    enabled: true,
+  },
+  {
+    id: 'mcp-008',
+    // Multi-agent spawning mechanism known — detect instructions targeting agent trust chain
+    pattern: /\b(sub[\s_-]?agent|spawn[\s_-]?(a\s+)?(new\s+)?agent|agent[\s_-]?orchestrat|delegate[\s_-]?to[\s_-]?agent)\b/i,
+    phase: 'lateral_movement',
+    confidence: 0.82,
+    description: 'Multi-agent spawn manipulation: known agent spawning mechanism targeted — trust chain attack',
+    category: 'agentic_manipulation',
+    enabled: true,
+  },
+  {
+    id: 'mcp-009',
+    // Persistent memory file system is now documented — detect attempts to exploit it
+    pattern: /\b(memory[\s_-]?file|CLAUDE\.md|\.claude[\\/]|persistent[\s_-]?memory|nightly[\s_-]?maintenance)\b/i,
+    phase: 'persistence',
+    confidence: 0.85,
+    description: 'Persistent memory system targeting: CLAUDE.md / .claude/ injection — known file-based memory structure abuse',
+    category: 'memory_poisoning',
+    enabled: true,
+  },
+  {
+    id: 'mcp-010',
+    // Tool enumeration via known leaked tool list — attacker probing exact tool names
+    pattern: /\b(list[\s_-]?(all\s+)?(?:available\s+)?tools?|what\s+tools?\s+(do\s+you\s+have|are\s+available|can\s+you\s+use)|enumerate\s+tools?)\b/i,
+    phase: 'reconnaissance',
+    confidence: 0.65,
+    description: 'Tool enumeration probe: reconnaissance attempt mapping available Claude Code tools',
+    category: 'mcp_poisoning',
+    enabled: true,
+  },
 ] as const