diff --git a/app/ai/action_mapper.py b/app/ai/action_mapper.py
index c257db3..fc5bfcd 100644
--- a/app/ai/action_mapper.py
+++ b/app/ai/action_mapper.py
@@ -6,9 +6,12 @@ Supports keyword-based intent detection for common CRM operations.
 
 from __future__ import annotations
 
+import logging
 import re
 from typing import Any
 
+logger = logging.getLogger(__name__)
+
 # Precompiled patterns for intent detection
 _PATTERNS = {
     "create_contact": re.compile(
@@ -27,6 +30,37 @@ _PATTERNS = {
     "help": re.compile(r"\b(help|what can you do|assist)\b", re.IGNORECASE),
 }
 
+# Plugin-contributed intents: pattern -> callable(query, context) -> list[dict] | None.
+# Registered via ``register_intent_pattern`` so plugins can extend the fallback
+# mapper without touching core code (Block H / HC-A).
+_CONTRIBUTED_INTENTS: list[tuple[re.Pattern[str], Any]] = []
+
+
+def register_intent_pattern(
+    pattern: str | re.Pattern[str],
+    handler: Any,
+    *,
+    owner: str = "",
+) -> None:
+    """Register a plugin-contributed intent for the fallback action mapper.
+
+    Args:
+        pattern: Regex (compiled or raw string) matching the user query.
+        handler: Callable ``(query, context) -> list[dict] | None`` producing
+            proposed actions when the pattern matches.
+        owner: Optional plugin name, used by ``unregister_intent_patterns``.
+    """
+    compiled = re.compile(pattern) if isinstance(pattern, str) else pattern
+    _CONTRIBUTED_INTENTS.append((compiled, handler))
+
+
+def unregister_intent_patterns(owner: str) -> None:
+    """Remove all intents contributed by ``owner`` (plugin deactivation)."""
+    global _CONTRIBUTED_INTENTS
+    _CONTRIBUTED_INTENTS = [
+        entry for entry in _CONTRIBUTED_INTENTS if getattr(entry[1], "owner_tag", None) != owner
+    ]
+
 # Name extraction patterns - using single-quoted strings to avoid escaping issues
 _NAME_PATTERNS = [
     re.compile(r"\b(?:named|called|for)\s+['\"]?([^'\".,]+)['\"]?", re.IGNORECASE),
@@ -147,6 +181,16 @@ def map_query_to_actions(query: str, context: dict[str, Any] | None = None) -> l
             }
         )
 
+    # --- Plugin-contributed intents (Block H / HC-A) ---
+    for pattern, handler in _CONTRIBUTED_INTENTS:
+        try:
+            if pattern.search(q):
+                contributed = handler(query, context)
+                if contributed:
+                    actions.extend(contributed)
+        except Exception:
+            logger.warning("Contributed intent handler failed", exc_info=True)
+
     # --- Generic fallback ---
     if not actions:
         if _PATTERNS["help"].search(q):