docs: clarify codex plugin auto-enable boundary

docs/concepts/model-providers.md

@@ -21,6 +21,9 @@ For model selection rules, see [/concepts/models](/concepts/models).
   and `openai/<model>` plus `agents.defaults.embeddedHarness.runtime: "codex"`
   uses the native Codex app-server harness. See [OpenAI](/providers/openai)
   and [Codex harness](/plugins/codex-harness).
+- Plugin auto-enable follows that same boundary: `openai-codex/<model>` belongs
+  to the OpenAI plugin, while the Codex plugin is enabled by
+  `embeddedHarness.runtime: "codex"` or legacy `codex/<model>` refs.
 - GPT-5.5 is currently available through subscription/OAuth routes:
   `openai-codex/gpt-5.5` in PI or `openai/gpt-5.5` with the Codex app-server
   harness. The direct API-key route for `openai/gpt-5.5` is supported once
@@ -110,6 +113,9 @@ OpenClaw ships with the pi‑ai catalog. These providers require **no**
 - PI model ref: `openai-codex/gpt-5.5`
 - Native Codex app-server harness ref: `openai/gpt-5.5` with `agents.defaults.embeddedHarness.runtime: "codex"`
 - Legacy model refs: `codex/gpt-*`
+- Plugin boundary: `openai-codex/*` loads the OpenAI plugin; the native Codex
+  app-server plugin is selected only by the Codex harness runtime or legacy
+  `codex/*` refs.
 - CLI: `openclaw onboard --auth-choice openai-codex` or `openclaw models auth login --provider openai-codex`
 - Default transport is `auto` (WebSocket-first, SSE fallback)
 - Override per PI model via `agents.defaults.models["openai-codex/<model>"].params.transport` (`"sse"`, `"websocket"`, or `"auto"`)

docs/providers/openai.md

@@ -23,6 +23,13 @@ supported once OpenAI enables GPT-5.5 on the public API; until then use an
 API-enabled model such as `openai/gpt-5.4` for `OPENAI_API_KEY` setups.
 </Note>
 
+<Note>
+Enabling the OpenAI plugin, or selecting an `openai-codex/*` model, does not
+enable the bundled Codex app-server plugin. OpenClaw enables that plugin only
+when you explicitly select the native Codex harness with
+`embeddedHarness.runtime: "codex"` or use a legacy `codex/*` model ref.
+</Note>
+
 ## OpenClaw feature coverage
 
 | OpenAI capability         | OpenClaw surface                                           | Status                                                 |
@@ -141,6 +148,7 @@ Choose your preferred auth method and follow the setup steps.
     <Note>
     Keep using the `openai-codex` provider id for auth/profile commands. The
     `openai-codex/*` model prefix is also the explicit PI route for Codex OAuth.
+    It does not select or auto-enable the bundled Codex app-server harness.
     </Note>
 
     ### Config example

docs/tools/plugin.md

@@ -189,6 +189,13 @@ OpenClaw scans for plugins in this order (first match wins):
 - Workspace-origin plugins are **disabled by default** (must be explicitly enabled)
 - Bundled plugins follow the built-in default-on set unless overridden
 - Exclusive slots can force-enable the selected plugin for that slot
+- Some bundled opt-in plugins are enabled automatically when config names a
+  plugin-owned surface, such as a provider model ref, channel config, or harness
+  runtime
+- OpenAI-family Codex routes keep separate plugin boundaries:
+  `openai-codex/*` belongs to the OpenAI plugin, while the bundled Codex
+  app-server plugin is selected by `embeddedHarness.runtime: "codex"` or legacy
+  `codex/*` model refs
 
 ## Plugin slots (exclusive categories)