When to invoke this skill

Detects global vs vendored install, runs the upgrade, and shows what's new. Use when asked to "upgrade gstack", "update gstack", or "get latest version".

Voice triggers (speech-to-text aliases): "upgrade the tools", "update the tools", "gee stack upgrade", "g stack upgrade".

/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=$(~/.claude/skills/gstack/bin/gstack-config get auto_upgrade 2>/dev/null || true)
echo "AUTO_UPGRADE=$_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. On setup failure, follow Step 4's install-specific recovery: vendored installs restore their backup; git installs stop with the pre-upgrade commit recorded, without a destructive reset. Never claim restoration unless it actually succeeded.

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":

~/.claude/skills/gstack/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":

~/.claude/skills/gstack/bin/gstack-config set update_check false

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

Step 2: Detect install type

if [ -d "$HOME/.claude/skills/gstack/.git" ]; then
  INSTALL_TYPE="global-git"
  INSTALL_DIR="$HOME/.claude/skills/gstack"
elif [ -d "$HOME/.gstack/repos/gstack/.git" ]; then
  INSTALL_TYPE="global-git"
  INSTALL_DIR="$HOME/.gstack/repos/gstack"
elif [ -d ".claude/skills/gstack/.git" ]; then
  INSTALL_TYPE="local-git"
  INSTALL_DIR=".claude/skills/gstack"
elif [ -d ".agents/skills/gstack/.git" ]; then
  INSTALL_TYPE="local-git"
  INSTALL_DIR=".agents/skills/gstack"
elif [ -d ".claude/skills/gstack" ]; then
  INSTALL_TYPE="vendored"
  INSTALL_DIR=".claude/skills/gstack"
elif [ -d "$HOME/.claude/skills/gstack" ]; then
  INSTALL_TYPE="vendored-global"
  INSTALL_DIR="$HOME/.claude/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. Resolve INSTALL_DIR to an absolute path. Carry INSTALL_TYPE, INSTALL_DIR, OLD_VERSION, and later NEW_VERSION forward explicitly: if tool calls use fresh shells, reassign them from captured output before running a block. Do not rely on a prior call's working directory or shell variables.

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")
echo "OLD_VERSION=$OLD_VERSION"

Step 4: Upgrade

Use the install type and directory detected in Step 2:

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

Fast-forward first (#2517) — the same policy the session-update auto-upgrade uses. --autostash carries local edits over the pull; render-footprint dirt is discarded first because it is regenerable and poisons stashes (#2569):

cd "$INSTALL_DIR"
# Discard render-footprint dirt (#2569): pre-v1.67 gbrain-enabled installs
# ran gen:skill-docs:user IN PLACE, leaving generated SKILL.md / sections
# files permanently modified. They are regenerable (setup re-renders to
# ~/.gstack/render), so discarding is lossless.
git checkout -- 'SKILL.md' '*/SKILL.md' '*/sections/*.md' 2>/dev/null || true
git fetch origin
PRE_UPGRADE_COMMIT=$(git rev-parse HEAD)
echo "PRE_UPGRADE_COMMIT=$PRE_UPGRADE_COMMIT"
if git pull --ff-only --autostash origin main; then
  if ./setup; then echo "FF_OK"; else echo "SETUP_FAILED: git update succeeded; stop and inspect setup output (previous commit: $PRE_UPGRADE_COMMIT)" >&2; exit 1; fi
else
  echo "FF_REFUSED"
fi

If the output ends with FF_OK, the upgrade is done — skip the fallback below entirely. On SETUP_FAILED, STOP; keep user changes and report the recovery commit. There is no .bak on the git path. Do not enter the divergence fallback merely because setup failed. Enter it only on FF_REFUSED, after inspecting the pull error; network/auth failures stop for repair, not reset.

Fallback (ff-only refused — local commits or divergence). git reset --hard DESTROYS things: a clean tree with unpushed local commits still loses those commits. Gate it (#2517):

1. Run git status --porcelain and git rev-list origin/main..HEAD --oneline in $INSTALL_DIR.
2. If BOTH are empty, the reset is provably safe — run the fallback block below without asking.
3. Otherwise ask via AskUserQuestion (one-way door — destructive), listing exactly what will be discarded: each dirty file and each unpushed commit by hash + subject. Options: A) Discard them and upgrade (reset) — requires the explicit letter; B) Abort the upgrade so the user can rescue their work first (recommended when local commits exist). Never proceed on a vague reply.

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

If $STASH_OUTPUT contains "Saved working directory", warn the user: "Note: local changes were stashed (any modified generated SKILL.md/sections files were discarded first — they regenerate on setup). Run git stash pop in the skill directory to restore your own changes."

For vendored installs (vendored, vendored-global):

PARENT=$(dirname "$INSTALL_DIR")
# A stale .bak from a previously crashed upgrade would make the mv below NEST
# the live install inside it and the failure-restore arm would "restore" the
# stale backup. It may also be the only good copy from that crashed run —
# abort and let the human inspect, never delete it silently.
[ -e "$INSTALL_DIR.bak" ] && { echo "ERROR: stale backup exists at $INSTALL_DIR.bak (from a previous failed upgrade?) — inspect it, salvage/remove it, then re-run." >&2; exit 1; }
TMP_DIR=$(mktemp -d) || { echo "ERROR: mktemp failed — aborting upgrade (install untouched)." >&2; exit 1; }
git clone --depth 1 https://github.com/garrytan/gstack.git "$TMP_DIR/gstack" || { echo "ERROR: clone failed — aborting upgrade (install untouched)." >&2; rm -rf "$TMP_DIR"; exit 1; }
mv "$INSTALL_DIR" "$INSTALL_DIR.bak" || { rm -rf "$TMP_DIR"; exit 1; }
if mv "$TMP_DIR/gstack" "$INSTALL_DIR"; then
  if (cd "$INSTALL_DIR" && ./setup); then
    rm -rf "$INSTALL_DIR.bak" "$TMP_DIR"
  else
    rm -rf "$INSTALL_DIR"
    mv "$INSTALL_DIR.bak" "$INSTALL_DIR" || { echo "ERROR: restore failed; backup retained." >&2; exit 1; }
    rm -rf "$TMP_DIR"
    echo "ERROR: setup failed; previous install restored." >&2
    exit 1
  fi
else
  mv "$INSTALL_DIR.bak" "$INSTALL_DIR"
  echo "ERROR: swap failed — previous install restored; upgrade aborted." >&2
  rm -rf "$TMP_DIR"
  exit 1
fi

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 "$_ROOT/.claude/skills/gstack" ]; then
  _RESOLVED_LOCAL=$(cd "$_ROOT/.claude/skills/gstack" && pwd -P)
  _RESOLVED_PRIMARY=$(cd "$INSTALL_DIR" && pwd -P)
  if [ "$_RESOLVED_LOCAL" != "$_RESOLVED_PRIMARY" ]; then
    LOCAL_GSTACK="$_ROOT/.claude/skills/gstack"
  fi
fi
_TEAM_MODE=$(~/.claude/skills/gstack/bin/gstack-config get team_mode 2>/dev/null || echo "false")
echo "LOCAL_GSTACK=$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 "$_ROOT"
git rm -r --cached .claude/skills/gstack/ 2>/dev/null || true
if ! grep -qF '.claude/skills/gstack/' .gitignore 2>/dev/null; then
  echo '.claude/skills/gstack/' >> .gitignore
fi
rm -rf "$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):

[ -e "$LOCAL_GSTACK.bak" ] && { echo "ERROR: stale vendored backup; inspect it before retrying." >&2; exit 1; }
mv "$LOCAL_GSTACK" "$LOCAL_GSTACK.bak" || exit 1
if cp -Rf "$INSTALL_DIR" "$LOCAL_GSTACK" && rm -rf "$LOCAL_GSTACK/.git" && (cd "$LOCAL_GSTACK" && ./setup); then
  rm -rf "$LOCAL_GSTACK.bak"
  echo "LOCAL_SYNC_OK"
else
  rm -rf "$LOCAL_GSTACK"
  mv "$LOCAL_GSTACK.bak" "$LOCAL_GSTACK" || { echo "ERROR: restore failed; backup retained." >&2; exit 1; }
  echo "ERROR: sync failed; previous vendored copy restored." >&2
  exit 1
fi

Only on LOCAL_SYNC_OK, tell user: "Also updated vendored copy at $LOCAL_GSTACK — commit .claude/skills/gstack/ when you're ready." Otherwise stop and report the recovery outcome; do not continue migrations or announce success.

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 $m_ver..."
      # GSTACK_INSTALL_DIR: migrations that clean the INSTALL (not just
      # ~/.gstack state) default to ~/.claude/skills/gstack when unset —
      # a repo-local install would silently no-op without this.
      GSTACK_INSTALL_DIR="$INSTALL_DIR" 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 4.8: Stop any stale daemon (unconditional)

A browse daemon started before the upgrade keeps serving the OLD binary's code until it is stopped — it survives git reset --hard and ./setup because the running process holds the old executable (#2551). Always run this step, using the install directory detected in Step 2.

INSTALL_DIR_PLACEHOLDER="<install dir from Step 2>"
NEW_HASH=$(cat "$INSTALL_DIR_PLACEHOLDER/browse/dist/.version" 2>/dev/null || echo "")
_STATE_FILE="${BROWSE_STATE_FILE:-$(git rev-parse --show-toplevel 2>/dev/null || pwd)/.gstack/browse.json}"
if [ -z "$NEW_HASH" ] || [ ! -f "$_STATE_FILE" ]; then
  echo "DAEMON_CHECK=none (no state file or no fresh build hash)"
else
  DAEMON_PID=$(sed -n 's/.*"pid"[[:space:]]*:[[:space:]]*\([0-9][0-9]*\).*/\1/p' "$_STATE_FILE" | head -1)
  DAEMON_PORT=$(sed -n 's/.*"port"[[:space:]]*:[[:space:]]*\([0-9][0-9]*\).*/\1/p' "$_STATE_FILE" | head -1)
  OLD_HASH=$(sed -n 's/.*"binaryVersion"[[:space:]]*:[[:space:]]*"\([^"]*\)".*/\1/p' "$_STATE_FILE" | head -1)
  if [ -z "$DAEMON_PID" ] || ! kill -0 "$DAEMON_PID" 2>/dev/null; then
    echo "DAEMON_CHECK=dead (no live daemon to stop)"
  elif [ "$OLD_HASH" = "$NEW_HASH" ]; then
    echo "DAEMON_CHECK=current (daemon already runs the new binary)"
  elif curl -fsS --max-time 2 "http://127.0.0.1:$DAEMON_PORT/health" 2>/dev/null | grep -q '"status":"healthy"'; then
    echo "DAEMON_CHECK=stale-responsive pid=$DAEMON_PID hash=${OLD_HASH:-unknown} -> $NEW_HASH"
    "$INSTALL_DIR_PLACEHOLDER/browse/dist/browse" stop && echo "DAEMON_STOPPED=yes"
  else
    echo "DAEMON_CHECK=stale-busy pid=$DAEMON_PID hash=${OLD_HASH:-unknown} -> $NEW_HASH"
  fi
fi

Replace <install dir from Step 2> with the actual install directory before running. Interpret the DAEMON_CHECK result:

1. stale-responsive + DAEMON_STOPPED=yes: Tell the user "Stopped the old browse daemon (binary {OLD_HASH} → {NEW_HASH}). The next browse command starts a fresh daemon on the new binary."
2. stale-busy: The daemon runs the old binary but is mid-work — DEFER to it, never kill a busy daemon during upgrade. Tell the user: "A browse daemon is still running the pre-upgrade binary ({OLD_HASH} → {NEW_HASH}) but is busy right now. When it finishes, stop it with browse stop — or force it immediately with browse --force-restart stop (loses that session's tabs/cookies/logins)."
3. none / dead / current: Nothing to do — say nothing.

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):

~/.claude/skills/gstack/bin/gstack-update-check --force 2>/dev/null || \
.claude/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 .claude/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."