diff --git a/README.md b/README.md
index 2754806..0e949da 100644
--- a/README.md
+++ b/README.md
@@ -25,6 +25,7 @@ Eight opinionated workflow skills for [Claude Code](https://docs.anthropic.com/e
 | `/qa` | QA lead | Systematic QA testing. On a feature branch, auto-analyzes your diff, identifies affected pages, and tests them. Also: full exploration, quick smoke test, regression mode. |
 | `/setup-browser-cookies` | Session manager | Import cookies from your real browser (Comet, Chrome, Arc, Brave, Edge) into the headless session. Test authenticated pages without logging in manually. |
 | `/retro` | Engineering manager | Team-aware retro: your deep-dive + per-person praise and growth opportunities for every contributor. |
+| `/gstack-upgrade` | Upgrader | Upgrade gstack to the latest version and show what's new. |
 
 ## Demo: one feature, five modes
 
@@ -103,11 +104,11 @@ This is the setup I use. One person, ten parallel agents, each with the right co
 
 Open Claude Code and paste this. Claude will do the rest.
 
-> Install gstack: run `git clone https://github.com/garrytan/gstack.git ~/.claude/skills/gstack && cd ~/.claude/skills/gstack && ./setup` then add a "gstack" section to CLAUDE.md that says to use the /browse skill from gstack for all web browsing, never use mcp\_\_claude-in-chrome\_\_\* tools, and lists the available skills: /plan-ceo-review, /plan-eng-review, /review, /ship, /browse, /qa, /setup-browser-cookies, /retro. Then ask the user if they also want to add gstack to the current project so teammates get it.
+> Install gstack: run `git clone https://github.com/garrytan/gstack.git ~/.claude/skills/gstack && cd ~/.claude/skills/gstack && ./setup` then add a "gstack" section to CLAUDE.md that says to use the /browse skill from gstack for all web browsing, never use mcp\_\_claude-in-chrome\_\_\* tools, and lists the available skills: /plan-ceo-review, /plan-eng-review, /review, /ship, /browse, /qa, /setup-browser-cookies, /retro, /gstack-upgrade. Then ask the user if they also want to add gstack to the current project so teammates get it.
 
 ### Step 2: Add to your repo so teammates get it (optional)
 
-> Add gstack to this project: run `cp -Rf ~/.claude/skills/gstack .claude/skills/gstack && rm -rf .claude/skills/gstack/.git && cd .claude/skills/gstack && ./setup` then add a "gstack" section to this project's CLAUDE.md that says to use the /browse skill from gstack for all web browsing, never use mcp\_\_claude-in-chrome\_\_\* tools, lists the available skills: /plan-ceo-review, /plan-eng-review, /review, /ship, /browse, /qa, /setup-browser-cookies, /retro, and tells Claude that if gstack skills aren't working, run `cd .claude/skills/gstack && ./setup` to build the binary and register skills.
+> Add gstack to this project: run `cp -Rf ~/.claude/skills/gstack .claude/skills/gstack && rm -rf .claude/skills/gstack/.git && cd .claude/skills/gstack && ./setup` then add a "gstack" section to this project's CLAUDE.md that says to use the /browse skill from gstack for all web browsing, never use mcp\_\_claude-in-chrome\_\_\* tools, lists the available skills: /plan-ceo-review, /plan-eng-review, /review, /ship, /browse, /qa, /setup-browser-cookies, /retro, /gstack-upgrade, and tells Claude that if gstack skills aren't working, run `cd .claude/skills/gstack && ./setup` to build the binary and register skills.
 
 Real files get committed to your repo (not a submodule), so `git clone` just works. The binary and node\_modules are gitignored — teammates just need to run `cd .claude/skills/gstack && ./setup` once to build (or `/browse` handles it automatically on first use).