diff --git a/docs/codex-mcp-deployment.md b/docs/codex-mcp-deployment.md
index a455d2e..ed21281 100644
--- a/docs/codex-mcp-deployment.md
+++ b/docs/codex-mcp-deployment.md
@@ -136,7 +136,64 @@ rules for:
 
 Restart Codex Desktop after editing `config.toml`.
 
-## 5. Verify Deployment
+## 5. Configure Codex Auto Invocation
+
+The MCP entries above only make the tools available. Codex decides when to call
+them from instructions, so automatic sidecar use also needs an `AGENTS.md`
+policy.
+
+For machine-wide behavior, add this to `~/.codex/AGENTS.md`. For one project
+only, add it to that project's `AGENTS.md`.
+
+```markdown
+## OpenSpace Sidecar Evolution
+
+When the user asks for sidecar self-evolution, call:
+- `openspace_evolution.evolve_from_context`
+
+Trigger phrases:
+- `sidecar 自进化一下`
+- `做一次 sidecar 自进化`
+- `对当前这轮工作做一次 sidecar 自进化`
+- `用 sidecar 沉淀一个 skill`
+- `基于当前改动做一次 sidecar skill capture`
+- `不要改代码，做一次 sidecar 自进化`
+
+If the user uses one of these phrases, default to this workflow automatically
+unless they explicitly ask for a different behavior.
+
+Derive the tool inputs from:
+- the current conversation
+- the current `git diff`
+- the key changed files
+
+Pass `workspace_dir` explicitly as the current repository root, use
+`max_skills = 1` by default, and do not modify code during the evolution pass.
+```
+
+If you want Codex to run sidecar evolution automatically at the end of
+substantial repo work, add this stricter opt-in rule as well:
+
+```markdown
+## OpenSpace Auto Evolution
+
+If `openspace_evolution` MCP is available, and the assistant is about to
+conclude a non-trivial repo-scoped task with implementation and verification
+evidence, run `openspace_evolution.evolve_from_context` before the final
+completion message.
+
+Use `workspace_dir` as the current repo root, pass the most relevant changed
+files in `file_paths`, and use `max_skills = 1` by default.
+
+Do not auto-run evolution for casual chat, simple factual Q&A, pure log
+reading, pure audit/review/explanation, or doc-only edits unless the user
+explicitly asks to capture a reusable documentation workflow.
+```
+
+After changing `~/.codex/AGENTS.md`, start a new Codex session so the new
+instructions are loaded.
+
+## 6. Verify Deployment
 
 Run static config and wrapper checks:
 
@@ -161,7 +218,7 @@ Run a real Codex MCP session probe:
 If the probe passes, open Codex from a project repository and confirm the
 `openspace` and `openspace_evolution` MCP servers are available.
 
-## 6. Optional Launch Modes
+## 7. Optional Launch Modes
 
 ### Normal Global Mode
 
@@ -208,7 +265,7 @@ This launcher reads `openspace/.env`, writes an isolated profile under
 `~/.codex-openspace`, and enables both `openspace` and `openspace_evolution`
 MCP servers in daemon mode.
 
-## 7. Operational Guard
+## 8. Operational Guard
 
 The guard is available through both repository launchers: