The guards check runs each .gstack/pregate.json guard whose globs match a
touched file in its own process with its own timeout (PREGATE_GUARD_FAILED,
never downgradable, incomplete without --allow-repo-commands). The lanes
runner and guards get the first Bun in $BUN_INSTALL/bin or ~/.bun/bin that
satisfies gstack's and the project's engines.bun; serial_patterns files run
one process each. price_file replaces the unreleased price_command key: a
paid gate is priced from a call-plan data file, never by running a command.
Co-authored-by: capy-ai[bot] <230910855+capy-ai[bot]@users.noreply.github.com>
