Imported from bryanzk/MyCodexEnv (codex/skills/gstack-upgrade/SKILL.md). Install upstream with npx skills add bryanzk/MyCodexEnv --skill gstack-upgrade. Copyright stays with the author.

/gstack-upgrade

Upgrade gstack to the latest version and show what's new.

Inline upgrade flow

This section is referenced by all skill preambles when they detect UPGRADE_AVAILABLE.

Step 1: Ask the user (or auto-upgrade)

First, check if auto-upgrade is enabled:

_AUTO=""
[ "${GSTACK_AUTO_UPGRADE:-}" = "1" ] && _AUTO="true"
[ -z "$_AUTO" ] && _AUTO=$($GSTACK_ROOT/bin/gstack-config get auto_upgrade 2>/dev/null || true)
echo "AUTO_UPGRADE=$_AUTO"

If AUTO_UPGRADE=true or AUTO_UPGRADE=1: Skip AskUserQuestion. Log "Auto-upgrading gstack v{old} → v{new}..." and proceed directly to Step 2. If ./setup fails during auto-upgrade, restore from backup (.bak directory) and warn the user: "Auto-upgrade failed — restored previous version. Run /gstack-upgrade manually to retry."

Otherwise, use AskUserQuestion:

• Question: "gstack v{new} is available (you're on v{old}). Upgrade now?"
• Options: ["Yes, upgrade now", "Always keep me up to date", "Not now", "Never ask again"]

If "Yes, upgrade now": Proceed to Step 2.

If "Always keep me up to date":

$GSTACK_ROOT/bin/gstack-config set auto_upgrade true

Tell user: "Auto-upgrade enabled. Future updates will install automatically." Then proceed to Step 2.

If "Not now": Write snooze state with escalating backoff (first snooze = 24h, second = 48h, third+ = 1 week), then continue with the current skill. Do not mention the upgrade again.

_SNOOZE_FILE="$HOME/.gstack/update-snoozed"
_REMOTE_VER="{new}"
_CUR_LEVEL=0
if [ -f "$_SNOOZE_FILE" ]; then
  _SNOOZED_VER=$(awk '{print $1}' "$_SNOOZE_FILE")
  if [ "$_SNOOZED_VER" = "$_REMOTE_VER" ]; then
    _CUR_LEVEL=$(awk '{print $2}' "$_SNOOZE_FILE")
    case "$_CUR_LEVEL" in *[!0-9]*) _CUR_LEVEL=0 ;; esac
  fi
fi
_NEW_LEVEL=$((_CUR_LEVEL + 1))
[ "$_NEW_LEVEL" -gt 3 ] && _NEW_LEVEL=3
echo "$_REMOTE_VER $_NEW_LEVEL $(date +%s)" > "$_SNOOZE_FILE"

Note: {new} is the remote version from the UPGRADE_AVAILABLE output — substitute it from the update check result.

Tell user the snooze duration: "Next reminder in 24h" (or 48h or 1 week, depending on level). Tip: "Set auto_upgrade: true in ~/.gstack/config.yaml for automatic upgrades."

If "Never ask again":

$GSTACK_ROOT/bin/gstack-config set update_check false

Tell user: "Update checks disabled. Run $GSTACK_ROOT/bin/gstack-config set update_check true to re-enable." Continue with the current skill.

Step 2: Detect install type

if [ -d "$HOME/.agents/skills/gstack/.git" ]; then
  INSTALL_TYPE="global-git"
  INSTALL_DIR="$HOME/.agents/skills/gstack"
elif [ -d "$HOME/.gstack/repos/gstack/.git" ]; then
  INSTALL_TYPE="global-git"
  INSTALL_DIR="$HOME/.gstack/repos/gstack"
elif [ -d ".agents/skills/gstack/.git" ]; then
  INSTALL_TYPE="local-git"
  INSTALL_DIR=".agents/skills/gstack"
elif [ -d ".agents/skills/gstack/.git" ]; then
  INSTALL_TYPE="local-git"
  INSTALL_DIR=".agents/skills/gstack"
elif [ -d ".agents/skills/gstack" ]; then
  INSTALL_TYPE="vendored"
  INSTALL_DIR=".agents/skills/gstack"
elif [ -d "$HOME/.agents/skills/gstack" ]; then
  INSTALL_TYPE="vendored-global"
  INSTALL_DIR="$HOME/.agents/skills/gstack"
else
  echo "ERROR: gstack not found"
  exit 1
fi
echo "Install type: $INSTALL_TYPE at $INSTALL_DIR"

The install type and directory path printed above will be used in all subsequent steps.

Step 3: Save old version

Use the install directory from Step 2's output below:

OLD_VERSION=$(cat "$INSTALL_DIR/VERSION" 2>/dev/null || echo "unknown")

Step 4: Upgrade

Use the install type and directory detected in Step 2:

For git installs (global-git, local-git):

cd "$INSTALL_DIR"
STASH_OUTPUT=$(git stash 2>&1)
git fetch origin
git reset --hard origin/main
./setup

If $STASH_OUTPUT contains "Saved working directory", warn the user: "Note: local changes were stashed. Run git stash pop in the skill directory to restore them."

For vendored installs (vendored, vendored-global):

PARENT=$(dirname "$INSTALL_DIR")
TMP_DIR=$(mktemp -d)
git clone --depth 1 https://github.com/garrytan/gstack.git "$TMP_DIR/gstack"
mv "$INSTALL_DIR" "$INSTALL_DIR.bak"
mv "$TMP_DIR/gstack" "$INSTALL_DIR"
cd "$INSTALL_DIR" && ./setup
rm -rf "$INSTALL_DIR.bak" "$TMP_DIR"

Step 4.5: Handle local vendored copy

Use the install directory from Step 2. Check if there's also a local vendored copy, and whether team mode is active:

_ROOT=$(git rev-parse --show-toplevel 2>/dev/null)
LOCAL_GSTACK=""
if [ -n "$_ROOT" ] && [ -d "$_ROOT/.agents/skills/gstack" ]; then
  _RESOLVED_LOCAL=$(cd "$_ROOT/.agents/skills/gstack" && pwd -P)
  _RESOLVED_PRIMARY=$(cd "$INSTALL_DIR" && pwd -P)
  if [ "$_RESOLVED_LOCAL" != "$_RESOLVED_PRIMARY" ]; then
    LOCAL_GSTACK="$_ROOT/.agents/skills/gstack"
  fi
fi
_TEAM_MODE=$($GSTACK_ROOT/bin/gstack-config get team_mode 2>/dev/null || echo "false")
echo "LOCAL_GSTACK=$LOCAL_GSTACK"
echo "TEAM_MODE=$_TEAM_MODE"

If LOCAL_GSTACK is non-empty AND TEAM_MODE is true: Remove the vendored copy. Team mode uses the global install as the single source of truth.

cd "$_ROOT"
git rm -r --cached .agents/skills/gstack/ 2>/dev/null || true
if ! grep -qF '.agents/skills/gstack/' .gitignore 2>/dev/null; then
  echo '.agents/skills/gstack/' >> .gitignore
fi
rm -rf "$LOCAL_GSTACK"

Tell user: "Removed vendored copy at $LOCAL_GSTACK (team mode active — global install is the source of truth). Commit the .gitignore change when ready."

If LOCAL_GSTACK is non-empty AND TEAM_MODE is NOT true: Update it by copying from the freshly-upgraded primary install (same approach as README vendored install):

mv "$LOCAL_GSTACK" "$LOCAL_GSTACK.bak"
cp -Rf "$INSTALL_DIR" "$LOCAL_GSTACK"
rm -rf "$LOCAL_GSTACK/.git"
cd "$LOCAL_GSTACK" && ./setup
rm -rf "$LOCAL_GSTACK.bak"

Tell user: "Also updated vendored copy at $LOCAL_GSTACK — commit .agents/skills/gstack/ when you're ready."

If ./setup fails, restore from backup and warn the user:

rm -rf "$LOCAL_GSTACK"
mv "$LOCAL_GSTACK.bak" "$LOCAL_GSTACK"

Tell user: "Sync failed — restored previous version at $LOCAL_GSTACK. Run /gstack-upgrade manually to retry."

Step 4.75: Run version migrations

After ./setup completes, run any migration scripts for versions between the old and new version. Migrations handle state fixes that ./setup alone can't cover (stale config, orphaned files, directory structure changes).

MIGRATIONS_DIR="$INSTALL_DIR/gstack-upgrade/migrations"
if [ -d "$MIGRATIONS_DIR" ]; then
  for migration in $(find "$MIGRATIONS_DIR" -maxdepth 1 -name 'v*.sh' -type f 2>/dev/null | sort -V); do
    # Extract version from filename: v0.15.2.0.sh → 0.15.2.0
    m_ver="$(basename "$migration" .sh | sed 's/^v//')"
    # Run if this migration version is newer than old version
    # (simple string compare works for dotted versions with same segment count)
    if [ "$OLD_VERSION" != "unknown" ] && [ "$(printf '%s\n%s' "$OLD_VERSION" "$m_ver" | sort -V | head -1)" = "$OLD_VERSION" ] && [ "$OLD_VERSION" != "$m_ver" ]; then
      echo "Running migration $m_ver..."
      bash "$migration" || echo "  Warning: migration $m_ver had errors (non-fatal)"
    fi
  done
fi

Migrations are idempotent bash scripts in gstack-upgrade/migrations/. Each is named v{VERSION}.sh and runs only when upgrading from an older version. See CONTRIBUTING.md for how to add new migrations.

Step 5: Write marker + clear cache

mkdir -p ~/.gstack
echo "$OLD_VERSION" > ~/.gstack/just-upgraded-from
rm -f ~/.gstack/last-update-check
rm -f ~/.gstack/update-snoozed

Step 6: Show What's New

Read $INSTALL_DIR/CHANGELOG.md. Find all version entries between the old version and the new version. Summarize as 5-7 bullets grouped by theme. Don't overwhelm — focus on user-facing changes. Skip internal refactors unless they're significant.

Format:

gstack v{new} — upgraded from v{old}!

What's new:
- [bullet 1]
- [bullet 2]
- ...

Happy shipping!

Step 7: Continue

After showing What's New, continue with whatever skill the user originally invoked. The upgrade is done — no further action needed.

Standalone usage

When invoked directly as /gstack-upgrade (not from a preamble):

1. Force a fresh update check (bypass cache):

$GSTACK_ROOT/bin/gstack-update-check --force 2>/dev/null || \
.agents/skills/gstack/bin/gstack-update-check --force 2>/dev/null || true

Use the output to determine if an upgrade is available.

2. If UPGRADE_AVAILABLE <old> <new>: follow Steps 2-6 above.

3. If no output (primary is up to date): check for a stale local vendored copy.

Run the Step 2 bash block above to detect the primary install type and directory (INSTALL_TYPE and INSTALL_DIR). Then run the Step 4.5 detection bash block above to check for a local vendored copy (LOCAL_GSTACK) and team mode status (TEAM_MODE).

If LOCAL_GSTACK is empty (no local vendored copy): tell the user "You're already on the latest version (v{version})."

If LOCAL_GSTACK is non-empty AND TEAM_MODE is true: Remove the vendored copy using the Step 4.5 team-mode removal bash block above. Tell user: "Global v{version} is up to date. Removed stale vendored copy (team mode active). Commit the .gitignore change when ready."

If LOCAL_GSTACK is non-empty AND TEAM_MODE is NOT true, compare versions:

PRIMARY_VER=$(cat "$INSTALL_DIR/VERSION" 2>/dev/null || echo "unknown")
LOCAL_VER=$(cat "$LOCAL_GSTACK/VERSION" 2>/dev/null || echo "unknown")
echo "PRIMARY=$PRIMARY_VER LOCAL=$LOCAL_VER"

If versions differ: follow the Step 4.5 sync bash block above to update the local copy from the primary. Tell user: "Global v{PRIMARY_VER} is up to date. Updated local vendored copy from v{LOCAL_VER} → v{PRIMARY_VER}. Commit .agents/skills/gstack/ when you're ready."

If versions match: tell the user "You're on the latest version (v{PRIMARY_VER}). Global and local vendored copy are both up to date."