docs: clarify councillor model configuration

The documentation incorrectly implied that the councillor model could be
configured via , but the model is actually
always taken from the preset configuration ().

Changes:
- Remove  from the  example since it's
  ignored (model comes from preset)
- Clarify that  configures temperature, MCPs, skills
  but NOT the model
- Update the Constraints section to be accurate about what can be
  configured via
- Add note that the default model is only a fallback

Fixes #375

docs/council.md

@@ -123,7 +123,7 @@ Each councillor within a preset:
 
 - Councillors run as **agent sessions with read-only codebase access** — they can read files, search by name (glob), search by content (grep), search by AST pattern (codesearch), and query the language server (LSP). They cannot modify files, run shell commands, or spawn subagents. This makes council responses grounded in actual code rather than guessing.
 - The council agent itself synthesises the final answer from councillor results using its own model.
-- Councillor agents can be configured (model, temperature, MCPs, skills) via the standard `agents.councillor` preset override.
+- Councillor agents can be configured (temperature, MCPs, skills) via the standard `agents.councillor` override. The model is always set per-councillor in the preset configuration.
 
 ---
 
@@ -450,7 +450,6 @@ Councillor is a registered agent, so you can customise it using the standard `ag
 {
   "agents": {
     "councillor": {
-      "model": "openai/gpt-5.4",
       "temperature": 0.3,
       "mcps": ["grep_app", "context7"]
     }
@@ -458,12 +457,12 @@ Councillor is a registered agent, so you can customise it using the standard `ag
 }
 ```
 
+**Important:** The `model` for each councillor is configured per-preset in `council.presets.<name>.<councillor>.model` (see [Councillor Configuration](#councillor-configuration) above). Settings in `agents.councillor` apply to all councillors (temperature, MCPs, skills, etc.) but the model always comes from the preset.
+
 **Defaults:**
 | Agent | Model | MCPs | Skills | Temperature |
 |-------|-------|------|--------|-------------|
-| `councillor` | `openai/gpt-5.4-mini` | none | none | 0.2 |
-
-**Note:** Per-councillor model overrides in the council config (`presets.<name>.<councillor>.model`) take precedence over the agent-level default.
+| `councillor` | `openai/gpt-5.4-mini` (fallback only) | none | none | 0.2 |
 
 ### Architecture Diagram