diff --git a/docs/ARCHITECTURE.md b/docs/ARCHITECTURE.md
index f9f60ca..51c14e5 100644
--- a/docs/ARCHITECTURE.md
+++ b/docs/ARCHITECTURE.md
@@ -49,23 +49,32 @@ Agents can respond with just `PASS` if they genuinely have nothing meaningful to
 Beyond the configured turn interval, the `needs_human_input()` method performs an additional check: if the **last agent message explicitly addresses the user by name**, the HITL prompt fires immediately. This ensures the conversation never inadvertently "speaks for" the human participant.
 
 **Decision Flow:**
-```
-generate_next_turn()
-    ↓
-Orchestrator due? → speak (or PASS → skip)
-    ↓
-_forced_next_agent set? → use it, clear it
-    ↓
-session_type = DYNAMIC?
-    → @mention in last message? → forced agent
-    → Score all agents by expertise → pick best
-    → fallback: round robin
-    ↓
-agent.generate_response()
-    ↓
-response == "PASS"? → skip, return {skipped: True}
-    ↓
-append to history with timestamp, return turn_data
+```mermaid
+flowchart TD
+
+A[generate_next_turn()] --> B{Orchestrator due?}
+B -->|Yes| C[Speak or PASS]
+C -->|Speak| EndOrch[Append to history & return turn]
+C -->|PASS| D
+
+B -->|No| D{_forced_next_agent set?}
+D -->|Yes| E[Use forced agent & clear flag] --> L
+D -->|No| F{session_type = DYNAMIC?}
+
+F -->|No| K[Fallback: round robin / argumentative] --> L
+F -->|Yes| G{@mention in last message?}
+
+G -->|Yes| H[Use mentioned agent] --> L
+G -->|No| I[Score agents by expertise]
+
+I --> J{Top score > 0?}
+J -->|Yes| Best[Pick best matching agent] --> L
+J -->|No| K
+
+L[agent.generate_response()] --> M{response == PASS?}
+
+M -->|Yes| N[Skip turn, return skipped: True]
+M -->|No| O[Append to history with timestamp] --> P[Return turn_data]
 ```
 
 ## Custom Model Integrations (Bring Your Own Code)