The GSTACK_LAUNCH line carries PATH=<dir>:$PATH when the certified Bun is not
first on PATH, plus GSTACK_CAPY=1 and GSTACK_INSTALL_VERDICT, and
GSTACK_LAUNCH_PATH: <dir>; the doctor runs with that PATH. A supported Bun in
$BUN_INSTALL/bin is reused instead of downloaded again. Project pins are read
with bin/gstack-runtime-pins.ts (CI lanes included): when every exact pin is
gstack's verified version the archive is installed alongside a different PATH
Bun; any other exact pin is RUNTIME_PIN_CONFLICT. Both ./setup runs are
skipped when this HEAD was set up with the same hosts, model and browser flag
and the check passes (never after a fast-forward); a failed setup ends with
gstack: fail setup and is retried next run. --check certifies only;
GSTACK_CAPY_LOCK_HELD=1 accepts the bootstrapper's held lock; result anchors
come from the generated components table; REV_NOTE names bin/gstack-upgrade.
Intentional pin change: test/gstack-capy-install.test.ts --revision trailer
now names <root>/bin/gstack-upgrade (the old text named a command that never
existed).
Co-authored-by: capy-ai[bot] <230910855+capy-ai[bot]@users.noreply.github.com>
