diff --git a/bin/gstack-uninstall b/bin/gstack-uninstall
new file mode 100755
index 000000000..7ac316aa0
--- /dev/null
+++ b/bin/gstack-uninstall
@@ -0,0 +1,190 @@
+#!/usr/bin/env bash
+# gstack-uninstall — remove gstack skills, state, and browse daemons
+#
+# Usage:
+#   gstack-uninstall              — interactive uninstall (prompts before removing)
+#   gstack-uninstall --force      — remove everything without prompting
+#   gstack-uninstall --keep-state — remove skills but keep ~/.gstack/ data
+#
+# What gets removed:
+#   ~/.claude/skills/gstack       — global Claude skill install (git clone or vendored)
+#   ~/.claude/skills/{skill}      — per-skill symlinks created by setup
+#   ~/.codex/skills/gstack*       — Codex skill install + per-skill symlinks
+#   ~/.kiro/skills/gstack*        — Kiro skill install + per-skill symlinks
+#   ~/.gstack/                    — global state (config, analytics, sessions, projects, repos)
+#   .gstack/                      — per-project browse state (in current git repo)
+#   .agents/skills/gstack*        — Codex/Gemini/Cursor sidecar (in current git repo)
+#   Running browse daemons        — stopped via SIGTERM before cleanup
+#
+# What is NOT removed:
+#   ~/Library/Caches/ms-playwright/  — Playwright Chromium (shared, may be used by other tools)
+#   ~/.gstack-dev/                   — developer eval artifacts (only present in gstack contributors)
+#
+# Env overrides (for testing):
+#   GSTACK_DIR        — override auto-detected gstack root
+#   GSTACK_STATE_DIR  — override ~/.gstack state directory
+#
+# NOTE: Uses set -uo pipefail (no -e) — uninstall must never abort partway.
+set -uo pipefail
+
+GSTACK_DIR="${GSTACK_DIR:-$(cd "$(dirname "$0")/.." && pwd)}"
+STATE_DIR="${GSTACK_STATE_DIR:-$HOME/.gstack}"
+_GIT_ROOT="$(git rev-parse --show-toplevel 2>/dev/null || true)"
+
+# ─── Parse flags ─────────────────────────────────────────────
+FORCE=0
+KEEP_STATE=0
+while [ $# -gt 0 ]; do
+  case "$1" in
+    --force) FORCE=1; shift ;;
+    --keep-state) KEEP_STATE=1; shift ;;
+    -h|--help)
+      sed -n '2,/^[^#]/{ /^#/s/^# \{0,1\}//p; }' "$0"
+      exit 0
+      ;;
+    *)
+      echo "Unknown option: $1" >&2
+      echo "Usage: gstack-uninstall [--force] [--keep-state]" >&2
+      exit 1
+      ;;
+  esac
+done
+
+# ─── Confirmation ────────────────────────────────────────────
+if [ "$FORCE" -eq 0 ]; then
+  echo "This will remove gstack from your system:"
+  { [ -d "$HOME/.claude/skills/gstack" ] || [ -L "$HOME/.claude/skills/gstack" ]; } && echo "  ~/.claude/skills/gstack"
+  [ -d "$HOME/.codex/skills" ] && echo "  ~/.codex/skills/gstack*"
+  [ -d "$HOME/.kiro/skills" ] && echo "  ~/.kiro/skills/gstack*"
+  [ "$KEEP_STATE" -eq 0 ] && [ -d "$STATE_DIR" ] && echo "  $STATE_DIR"
+
+  if [ -n "$_GIT_ROOT" ]; then
+    [ -d "$_GIT_ROOT/.gstack" ] && echo "  $_GIT_ROOT/.gstack/"
+    [ -d "$_GIT_ROOT/.agents/skills" ] && echo "  $_GIT_ROOT/.agents/skills/gstack*"
+  fi
+
+  printf "\nContinue? [y/N] "
+  read -r REPLY
+  case "$REPLY" in
+    y|Y|yes|YES) ;;
+    *) echo "Aborted."; exit 0 ;;
+  esac
+fi
+
+removed=()
+
+# ─── Stop running browse daemons ─────────────────────────────
+# Browse servers write PID to {project}/.gstack/browse.json.
+# Stop any we can find before removing state directories.
+stop_browse_daemon() {
+  local state_file="$1"
+  if [ ! -f "$state_file" ]; then
+    return
+  fi
+  local pid
+  pid="$(awk -F'[:,]' '/"pid"/ { for(i=1;i<=NF;i++) if($i ~ /"pid"/) { gsub(/[^0-9]/, "", $(i+1)); print $(i+1); exit } }' "$state_file" 2>/dev/null || true)"
+  if [ -n "$pid" ] && kill -0 "$pid" 2>/dev/null; then
+    kill "$pid" 2>/dev/null || true
+    # Wait up to 2s for graceful shutdown
+    local waited=0
+    while [ "$waited" -lt 4 ] && kill -0 "$pid" 2>/dev/null; do
+      sleep 0.5
+      waited=$(( waited + 1 ))
+    done
+    if kill -0 "$pid" 2>/dev/null; then
+      kill -9 "$pid" 2>/dev/null || true
+    fi
+    removed+=("browse daemon (PID $pid)")
+  fi
+}
+
+# Stop daemon in current project
+if [ -n "$_GIT_ROOT" ] && [ -f "$_GIT_ROOT/.gstack/browse.json" ]; then
+  stop_browse_daemon "$_GIT_ROOT/.gstack/browse.json"
+fi
+
+# Stop daemons tracked in global projects directory
+if [ -d "$STATE_DIR/projects" ]; then
+  while IFS= read -r browse_json; do
+    stop_browse_daemon "$browse_json"
+  done < <(find "$STATE_DIR/projects" -name browse.json -path '*/.gstack/*' 2>/dev/null || true)
+fi
+
+# ─── Remove Claude skills ───────────────────────────────────
+CLAUDE_SKILLS="$HOME/.claude/skills"
+if [ -d "$CLAUDE_SKILLS/gstack" ] || [ -L "$CLAUDE_SKILLS/gstack" ]; then
+  # Remove per-skill symlinks that point into gstack/
+  for link in "$CLAUDE_SKILLS"/*; do
+    [ -L "$link" ] || continue
+    name="$(basename "$link")"
+    [ "$name" = "gstack" ] && continue
+    target="$(readlink "$link" 2>/dev/null || true)"
+    case "$target" in
+      gstack/*|*/gstack/*) rm -f "$link"; removed+=("claude/$name") ;;
+    esac
+  done
+
+  # Remove the gstack directory/symlink itself
+  rm -rf "$CLAUDE_SKILLS/gstack"
+  removed+=("~/.claude/skills/gstack")
+fi
+
+# ─── Remove Codex skills ────────────────────────────────────
+CODEX_SKILLS="$HOME/.codex/skills"
+if [ -d "$CODEX_SKILLS" ]; then
+  for item in "$CODEX_SKILLS"/gstack*; do
+    [ -e "$item" ] || [ -L "$item" ] || continue
+    rm -rf "$item"
+    removed+=("codex/$(basename "$item")")
+  done
+fi
+
+# ─── Remove Kiro skills ──────────────────────────────────────
+KIRO_SKILLS="$HOME/.kiro/skills"
+if [ -d "$KIRO_SKILLS" ]; then
+  for item in "$KIRO_SKILLS"/gstack*; do
+    [ -e "$item" ] || [ -L "$item" ] || continue
+    rm -rf "$item"
+    removed+=("kiro/$(basename "$item")")
+  done
+fi
+
+# ─── Remove per-project .agents/ sidecar ─────────────────────
+if [ -n "$_GIT_ROOT" ] && [ -d "$_GIT_ROOT/.agents/skills" ]; then
+  for item in "$_GIT_ROOT/.agents/skills"/gstack*; do
+    [ -e "$item" ] || [ -L "$item" ] || continue
+    rm -rf "$item"
+    removed+=("agents/$(basename "$item")")
+  done
+
+  rmdir "$_GIT_ROOT/.agents/skills" 2>/dev/null || true
+  rmdir "$_GIT_ROOT/.agents" 2>/dev/null || true
+fi
+
+# ─── Remove per-project .gstack/ state ───────────────────────
+if [ -n "$_GIT_ROOT" ] && [ -d "$_GIT_ROOT/.gstack" ]; then
+  rm -rf "$_GIT_ROOT/.gstack"
+  removed+=("$_GIT_ROOT/.gstack/")
+fi
+
+# ─── Remove global state ────────────────────────────────────
+if [ "$KEEP_STATE" -eq 0 ] && [ -d "$STATE_DIR" ]; then
+  rm -rf "$STATE_DIR"
+  removed+=("$STATE_DIR")
+fi
+
+# ─── Clean up temp files ────────────────────────────────────
+for tmp_file in /tmp/gstack-latest-version /tmp/gstack-sketch-*.html /tmp/gstack-sketch.png; do
+  if [ -e "$tmp_file" ]; then
+    rm -f "$tmp_file"
+    removed+=("$(basename "$tmp_file")")
+  fi
+done
+
+# ─── Summary ────────────────────────────────────────────────
+if [ ${#removed[@]} -gt 0 ]; then
+  echo "Removed: ${removed[*]}"
+  echo "gstack uninstalled."
+else
+  echo "Nothing to remove — gstack is not installed."
+fi