Idea: portable signed approval receipts for agent workflows (draft spec, feedback wanted)

[min9lin9]

spec-kit became the default on-ramp for spec-driven development. Our draft spec boulder-evidence-format v0 adds what happens after the plan: HMAC-signed human-approval receipts bound to sha256 artifact digests, emitted before execution. Would a challenge-to-receipt adapter be valuable to spec-kit users, or noise?

Spec (2 pages): https://github.com/min9lin9/boulder/blob/v0.1.17/spec/evidence-format/SPEC.md
Happy to adapt - one line on what would make this not worth adopting is genuinely welcome.

[mnriem]

Feel free to experiment with an extension and/or preset to deliver this and we can get it listed in the community catalog