approval-engine/workplans/APPROVAL-WP-0007-bounded-execution-carrier.md

id	type	title	domain	repo	status	flavor	owner	topic_slug	created	updated	depends_on
APPROVAL-WP-0007	workplan	Bounded-execution admission carrier: assurance floor, correspondence and revoker evidence	infotech	approval-engine	proposed	implementation	approval-engine	netkingdom	2026-10-31	2026-10-31

Demand: NetKingdom NK-WP-0056-T02 owner request (hub message 40344380-ea33-4670-9b27-dafca1699d36) to carry a Bounded Execution Admission v0.1 (proposed) as an approval. Owner answer: docs/bounded-execution-admission-carrier.md. The binding, consume and revoke already work. This plan closes the engine-side gaps the answer found. Every change is opt-in at issue, so existing approvals and consumers keep their behavior. Native digest, CAS consumption and no-unconsume are unchanged.

Declared minimum approver assurance

id: APPROVAL-WP-0007-T01
status: todo
priority: high

Add an optional required_assurance (minimum level, ordered aal1 < aal2 < aal3) to POST /v1/approvals. Store it and serve it in the object and the claim, and inherit it on supersede. add_entry refuses an entry whose verified token assurance.level is weaker or missing. _evaluate and consume refuse when an existing entry does not meet it. Schema migration leaves old rows NULL, meaning no floor. Tests cover aal1 refused, aal2 accepted, missing level refused, supersede inheritance and the claim reason_code. Serves BEA-C4. Whether KeyCape emits aal2 is KeyCape's question, outside this plan.

Opt-in approver and consumer correspondence

id: APPROVAL-WP-0007-T02
status: wait
priority: medium

Proposal for owner and Gate House agreement before implementation, because it gives principal and actor an enforced meaning. Two optional issue flags:

• principal_approves: every entry subject must equal binding.principal.
• actor_consumes: the consuming subject must equal binding.actor.

Today any human with approval:approve can approve, and any tenant service with approval:consume can spend the object (a denial-of-run risk). Wait reason: semantic decision. NetKingdom's actor and principal strings must also match KeyCape subjects exactly.

Revoker identity in revocation evidence

id: APPROVAL-WP-0007-T03
status: todo
priority: medium

Record the verified revoker's subject, principal_type and assurance, plus an optional bounded reason, in the approval.revocation outbox event. Persist them on the object (the revoked_by fields) without changing the CAS or terminal semantics. This is the evidence for the founder's pre-start kill switch (NK-WP-0056-T07). Do not require the revoker to equal the principal: revocation must stay possible without the holder.

Synthetic bounded-execution carrier proof

id: APPROVAL-WP-0007-T04
status: todo
priority: medium

Add an in-process test and an example request covering the full path: the executor (service) creates the request (action: bounded-execution, target: {admission_id, admission_digest}, human_control: true, pdp_path: false); a human aal2 entry approves it; GET binding comparison; consume with request_digest = admission digest; idempotent retry; a different digest returns 409; revoke before consume gives 409 on consume; consumption outside the window is refused. Synthetic fixtures only, with no live service.