Merge pull request #24 from StepzeroLab/feat/runtime-update-check

feat: runtime update check + rgit update

Author: Lum1104

README.md

@@ -130,6 +130,18 @@ That's the whole loop. The rest of the commands you'll meet as you need them —
 
 ---
 
+## Updating
+
+```bash
+rgit update
+```
+
+Upgrades the package (via whichever of uv/pipx/pip installed it) and refreshes every installed platform surface: the Claude Code plugin copy, MCP config, and the managed guidance blocks. Guidance blocks you have customized or removed are left alone — the command tells you how to restore them instead.
+
+rgit checks PyPI for a newer release at most once a day (in the background, terminal sessions only). Once one is found, it prints a one-line upgrade notice after every qualifying command until you upgrade or turn the notice off — the check is throttled, the reminder is not. Silence it for good with `rgit update --off`, or per-environment with `RGIT_UPDATE_CHECK=0`.
+
+---
+
 ## 🧩 Where it fits
 
 Anywhere you try many variations of one thing and later want a single one back — cleanly, on top of how the code looks now.