diff --git a/src/timmy/thinking.py b/src/timmy/thinking.py
index f5fe297..178c0d3 100644
--- a/src/timmy/thinking.py
+++ b/src/timmy/thinking.py
@@ -1076,5 +1076,80 @@ class ThinkingEngine:
             logger.debug("Failed to broadcast thought: %s", exc)
 
 
+def search_thoughts(query: str, seed_type: str | None = None, limit: int = 10) -> str:
+    """Search Timmy's thought history for reflections matching a query.
+
+    Use this tool when Timmy needs to recall his previous thoughts on a topic,
+    reflect on past insights, or build upon earlier reflections. This enables
+    self-awareness and continuity of thinking across time.
+
+    Args:
+        query: Search term to match against thought content (case-insensitive).
+        seed_type: Optional filter by thought category (e.g., 'existential',
+                   'swarm', 'sovereignty', 'creative', 'memory', 'observation').
+        limit: Maximum number of thoughts to return (default 10, max 50).
+
+    Returns:
+        Formatted string with matching thoughts, newest first, including
+        timestamps and seed types. Returns a helpful message if no matches found.
+    """
+    # Clamp limit to reasonable bounds
+    limit = max(1, min(limit, 50))
+
+    try:
+        engine = thinking_engine
+        db_path = engine._db_path
+
+        # Build query with optional seed_type filter
+        with _get_conn(db_path) as conn:
+            if seed_type:
+                rows = conn.execute(
+                    """
+                    SELECT id, content, seed_type, created_at
+                    FROM thoughts
+                    WHERE content LIKE ? AND seed_type = ?
+                    ORDER BY created_at DESC
+                    LIMIT ?
+                    """,
+                    (f"%{query}%", seed_type, limit),
+                ).fetchall()
+            else:
+                rows = conn.execute(
+                    """
+                    SELECT id, content, seed_type, created_at
+                    FROM thoughts
+                    WHERE content LIKE ?
+                    ORDER BY created_at DESC
+                    LIMIT ?
+                    """,
+                    (f"%{query}%", limit),
+                ).fetchall()
+
+        if not rows:
+            if seed_type:
+                return f'No thoughts found matching "{query}" with seed_type="{seed_type}".'
+            return f'No thoughts found matching "{query}".'
+
+        # Format results
+        lines = [f'Found {len(rows)} thought(s) matching "{query}":']
+        if seed_type:
+            lines[0] += f' [seed_type="{seed_type}"]'
+        lines.append("")
+
+        for row in rows:
+            ts = datetime.fromisoformat(row["created_at"])
+            local_ts = ts.astimezone()
+            time_str = local_ts.strftime("%Y-%m-%d %I:%M %p").lstrip("0")
+            seed = row["seed_type"]
+            content = row["content"].replace("\n", " ")  # Flatten newlines for display
+            lines.append(f"[{time_str}] ({seed}) {content[:150]}")
+
+        return "\n".join(lines)
+
+    except Exception as exc:
+        logger.warning("Thought search failed: %s", exc)
+        return f"Error searching thoughts: {exc}"
+
+
 # Module-level singleton
 thinking_engine = ThinkingEngine()
diff --git a/src/timmy/tools.py b/src/timmy/tools.py
index e49268e..8f33686 100644
--- a/src/timmy/tools.py
+++ b/src/timmy/tools.py
@@ -619,6 +619,17 @@ def _register_gematria_tool(toolkit: Toolkit) -> None:
         logger.debug("Gematria tool not available")
 
 
+def _register_thinking_tools(toolkit: Toolkit) -> None:
+    """Register thinking/introspection tools for self-reflection."""
+    try:
+        from timmy.thinking import search_thoughts
+
+        toolkit.register(search_thoughts, name="thought_search")
+    except (ImportError, AttributeError) as exc:
+        logger.warning("Tool execution failed (Thinking tools registration): %s", exc)
+        logger.debug("Thinking tools not available")
+
+
 def create_full_toolkit(base_dir: str | Path | None = None):
     """Create a full toolkit with all available tools (for the orchestrator).
 
@@ -646,6 +657,7 @@ def create_full_toolkit(base_dir: str | Path | None = None):
     _register_introspection_tools(toolkit)
     _register_delegation_tools(toolkit)
     _register_gematria_tool(toolkit)
+    _register_thinking_tools(toolkit)
 
     # Gitea issue management is now provided by the gitea-mcp server
     # (wired in as MCPTools in agent.py, not registered here)
@@ -837,6 +849,11 @@ def _introspection_tool_catalog() -> dict:
             "description": "Search past conversation logs for messages, tool calls, errors, and decisions",
             "available_in": ["orchestrator"],
         },
+        "thought_search": {
+            "name": "Thought Search",
+            "description": "Query Timmy's own thought history for past reflections and insights",
+            "available_in": ["orchestrator"],
+        },
     }
 
 
diff --git a/tests/timmy/test_thinking.py b/tests/timmy/test_thinking.py
index 5250c27..0acf012 100644
--- a/tests/timmy/test_thinking.py
+++ b/tests/timmy/test_thinking.py
@@ -833,6 +833,115 @@ def test_thinking_chain_api_404(client):
     assert response.status_code == 404
 
 
+# ---------------------------------------------------------------------------
+# Thought search
+# ---------------------------------------------------------------------------
+
+
+def test_search_thoughts_basic(tmp_path):
+    """search_thoughts should find thoughts by content substring."""
+    from timmy import thinking
+
+    engine = _make_engine(tmp_path)
+    engine._store_thought("I wonder about sovereignty and freedom.", "existential")
+    engine._store_thought("The swarm is performing well today.", "swarm")
+    engine._store_thought("True sovereignty comes from local execution.", "sovereignty")
+
+    with patch.object(thinking, "thinking_engine", engine):
+        result = thinking.search_thoughts("sovereignty")
+    assert "Found 2 thought(s)" in result
+    assert "sovereignty" in result.lower()
+
+
+def test_search_thoughts_with_seed_type(tmp_path):
+    """search_thoughts should filter by seed_type when provided."""
+    from timmy import thinking
+
+    engine = _make_engine(tmp_path)
+    engine._store_thought("I wonder about sovereignty and freedom.", "existential")
+    engine._store_thought("True sovereignty comes from local execution.", "sovereignty")
+
+    with patch.object(thinking, "thinking_engine", engine):
+        result = thinking.search_thoughts("sovereignty", seed_type="sovereignty")
+    assert "Found 1 thought(s)" in result
+    assert '[seed_type="sovereignty"]' in result
+
+
+def test_search_thoughts_no_matches(tmp_path):
+    """search_thoughts should return helpful message when no matches found."""
+    from timmy import thinking
+
+    engine = _make_engine(tmp_path)
+    engine._store_thought("A thought about memory.", "memory")
+
+    with patch.object(thinking, "thinking_engine", engine):
+        result = thinking.search_thoughts("xyz_nonexistent")
+    assert "No thoughts found" in result
+
+
+def test_search_thoughts_limit(tmp_path):
+    """search_thoughts should respect the limit parameter."""
+    from timmy import thinking
+
+    engine = _make_engine(tmp_path)
+    for i in range(5):
+        engine._store_thought(f"Sovereignty thought number {i}.", "sovereignty")
+
+    with patch.object(thinking, "thinking_engine", engine):
+        result = thinking.search_thoughts("sovereignty", limit=3)
+    assert "Found 3 thought(s)" in result
+
+
+def test_search_thoughts_limit_bounds(tmp_path):
+    """search_thoughts should clamp limit to valid bounds."""
+    from timmy import thinking
+
+    engine = _make_engine(tmp_path)
+    engine._store_thought("A test thought.", "freeform")
+
+    with patch.object(thinking, "thinking_engine", engine):
+        # These should not raise errors - just clamp internally
+        result_low = thinking.search_thoughts("test", limit=0)
+        result_high = thinking.search_thoughts("test", limit=100)
+    # Both should execute (may return no results, but shouldn't crash)
+    assert isinstance(result_low, str)
+    assert isinstance(result_high, str)
+
+
+def test_search_thoughts_case_insensitive(tmp_path):
+    """search_thoughts should be case-insensitive (SQLite LIKE is case-insensitive)."""
+    from timmy import thinking
+
+    engine = _make_engine(tmp_path)
+    engine._store_thought("The SWARM is active today.", "swarm")
+
+    with patch.object(thinking, "thinking_engine", engine):
+        result_lower = thinking.search_thoughts("swarm")
+        result_upper = thinking.search_thoughts("SWARM")
+        result_mixed = thinking.search_thoughts("Swarm")
+
+    assert "Found 1 thought(s)" in result_lower
+    assert "Found 1 thought(s)" in result_upper
+    assert "Found 1 thought(s)" in result_mixed
+
+
+def test_search_thoughts_returns_formatted_output(tmp_path):
+    """search_thoughts should return formatted output with timestamps and seed types."""
+    from timmy import thinking
+
+    engine = _make_engine(tmp_path)
+    engine._store_thought("A memorable thought about existence.", "existential")
+
+    with patch.object(thinking, "thinking_engine", engine):
+        result = thinking.search_thoughts("memorable")
+    # Should contain timestamp-like content (year in 2026)
+    assert "2026-" in result or "2025-" in result
+    # Should contain seed type
+    assert "existential" in result
+    # Should contain the thought content
+    assert "memorable thought" in result
+
+
 # ---------------------------------------------------------------------------
 # _call_agent uses skip_mcp=True (#72)
 # ---------------------------------------------------------------------------
@@ -884,8 +993,7 @@ async def test_call_agent_strips_think_tags(tmp_path):
     mock_agent = AsyncMock()
     mock_run = AsyncMock()
     mock_run.content = (
-        "<think>Let me reason about this carefully...</think>"
-        "The actual thought content."
+        "<think>Let me reason about this carefully...</think>The actual thought content."
     )
     mock_agent.arun.return_value = mock_run
 
@@ -903,10 +1011,7 @@ async def test_call_agent_strips_multiline_think_tags(tmp_path):
 
     mock_agent = AsyncMock()
     mock_run = AsyncMock()
-    mock_run.content = (
-        "<think>\nStep 1: analyze\nStep 2: synthesize\n</think>\n"
-        "Clean output here."
-    )
+    mock_run.content = "<think>\nStep 1: analyze\nStep 2: synthesize\n</think>\nClean output here."
     mock_agent.arun.return_value = mock_run
 
     with patch("timmy.agent.create_timmy", return_value=mock_agent):