Bun loads .env from the working directory, so a branch could set
GSTACK_PROJECT_SLUG or a state root and choose which pregate.json governs
it. The shebang now passes --no-env-file, scriptInvocation carries that
flag over when it launches the bin as bun <script>, and a bare bun launch
beside any dotenv file refuses (POLICY_SOURCE_UNAVAILABLE).
A recorded pass also outlived its policy: pregate.json now records the
user file's digest (or, under the defaults, the path that was absent), and
verify and the ship receipt treat an edited, deleted or newly present user
file as PREGATE_STALE, reading both paths from the record.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
