docs: replace NEW_FEAT.md with comprehensive FEAT.md, update README

- Delete NEW_FEAT.md
- Create FEAT.md with complete feature documentation across all versions
- Update README.md to reflect individual tool names and add @mention override

README.md

@@ -32,13 +32,17 @@ Dirigent adds deterministic logic **before model selection** and **turn-based sp
 - **Agent identity injection**
   - Injects agent name, Discord accountId, and Discord userId into group chat prompts
 
+- **Human @mention override**
+  - When a `humanList` user @mentions agents, temporarily overrides turn order
+  - Only mentioned agents cycle; original order restores when cycle completes
+
 - **Per-channel policy runtime**
   - Policies stored in a standalone JSON file
-  - Update at runtime via `dirigent_tools` (memory first → persist to file)
+  - Update at runtime via `dirigent_policy_set` / `dirigent_policy_delete` tools
 
 - **Discord control actions (optional)**
   - Private channel create/update + member list
-  - Unified via `dirigent_tools`
+  - Via `dirigent_channel_create`, `dirigent_channel_update`, `dirigent_member_list` tools
 
 ---
 
@@ -74,12 +78,24 @@ Discord extension capabilities: `docs/DISCORD_CONTROL.md`.
 
 ## Runtime tools & commands
 
-### Tool: `dirigent_tools`
+### Tools (9 individual tools)
 
-Actions:
-- `policy-get`, `policy-set-channel`, `policy-delete-channel`
-- `turn-status`, `turn-advance`, `turn-reset`
-- `channel-private-create`, `channel-private-update`, `member-list`
+**Discord control:**
+- `dirigent_channel_create` — Create private channel
+- `dirigent_channel_update` — Update channel permissions
+- `dirigent_member_list` — List guild members
+
+**Policy management:**
+- `dirigent_policy_get` — Get all policies
+- `dirigent_policy_set` — Set/update channel policy
+- `dirigent_policy_delete` — Delete channel policy
+
+**Turn management:**
+- `dirigent_turn_status` — Show turn state
+- `dirigent_turn_advance` — Advance turn
+- `dirigent_turn_reset` — Reset turn order
+
+> See `FEAT.md` for full feature documentation.
 
 ### Slash command (Discord)