feat(init): add Codex CLI support via AGENTS.md + RTK.md workflow

ARCHITECTURE.md

@@ -297,8 +297,8 @@ SHARED            utils.rs          Helpers                N/A        ✓
 
 ### Module Count Breakdown
 
-- **Command Modules**: 34 (directly exposed to users)
-- **Infrastructure Modules**: 20 (utils, filter, tracking, tee, config, init, gain, toml_filter, verify_cmd, etc.)
+- **Command Modules**: 44 (directly exposed to users)
+- **Infrastructure Modules**: 22 (utils, filter, tracking, tee, config, init, gain, toml_filter, verify_cmd, trust, etc.)
 - **Git Commands**: 7 operations (status, diff, log, add, commit, push, branch/checkout)
 - **JS/TS Tooling**: 8 modules (modern frontend/fullstack development)
 - **Python Tooling**: 3 modules (ruff, pytest, pip)

hooks/rtk-awareness-codex.md

@@ -0,0 +1,32 @@
+# RTK - Rust Token Killer (Codex CLI)
+
+**Usage**: Token-optimized CLI proxy for shell commands.
+
+## Rule
+
+Always prefix shell commands with `rtk`.
+
+Examples:
+
+```bash
+rtk git status
+rtk cargo test
+rtk npm run build
+rtk pytest -q
+```
+
+## Meta Commands
+
+```bash
+rtk gain            # Token savings analytics
+rtk gain --history  # Recent command savings history
+rtk proxy <cmd>     # Run raw command without filtering
+```
+
+## Verification
+
+```bash
+rtk --version
+rtk gain
+which rtk
+```