bin/gstack-egress-lib.sh (sourced library, gstack-gbrain-lib.sh
precedent) provides _receipted_curl and _receipted_git: write the
egress receipt BEFORE the send via gstack-egress-receipt, hand curl the
SAME payload file via --data-binary @file so the receipt hash matches
the wire bytes exactly, then append a best-effort outcome. Per-call
fail policy: 'closed' refuses the send (return 3, problem/cause/fix
message on stderr) and 'open' warns and proceeds. Payload temp files
are consumed immediately per call — no EXIT traps, since callers like
gstack-telemetry-sync own their own EXIT trap and a sourced trap would
clobber it.
Tested end-to-end against a local Bun.serve listener: receipt sha256
equals the sha256 of the bytes the listener received, fail-closed
refusal never touches the network and carries the problem/cause/fix
stderr shape, fail-open warns and proceeds.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
(cherry picked from commit 6d067dce2d4c8815dec98be551763c85a3671357)
Garry Tan