feat(builder): govern OS-image builds through the capability membrane (closure #1) - #557
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| const cli = (name, body) => { | ||
| const p = path.join(os.tmpdir(), name); | ||
| fs.writeFileSync(p, `let d='';process.stdin.on('data',c=>d+=c);process.stdin.on('end',()=>{${body}});`); |
mdheller
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August 4, 2026 17:10
… (closure #1) The image-build path was self-governed by sourceos-spec contracts but never passed through the estate's autonomy-governance fabric — a build could dispatch with no membrane decision on record. This admits every build through the AUTHORITATIVE capability membrane before dispatch and seals the decision into an AutonomyAdmissionReceipt (the same contract the membrane emits estate-wide). - src/services/buildAdmission.ts — composes a membrane CapabilityRequest for the build (surface=sourceos.os-image-build, tier→autonomy level, spec→risk), CALLS the authoritative membrane (never reinvents the decision) over a config-driven transport (MEMBRANE_GATE_URL http / MEMBRANE_GATE_CMD cli: JSON in, decision out, exit 0=allow /3=deny), and seals an AutonomyAdmissionReceipt.v0.2. Two safety properties: * ADVISORY BY DEFAULT — every build gets a decision + sealed receipt but is never blocked unless BUILD_ADMISSION_ENFORCE=true, so wiring this cannot break the live pipeline. Flip enforcement on once the membrane transport is confirmed in deploy. * FAIL-CLOSED WHEN ENFORCING — an unreachable/unwired membrane denies; never opens. - routes/api/builds-route.ts — admit before dispatchBuild: validate the receipt against the vendored schema (our own receipt must conform), persist it + emit srcos.builder.admission.decided, and on an enforced deny return 403 without dispatch. - contracts/schemas/AutonomyAdmissionReceipt.v0.2.json — vendored verbatim + hash-pinned from prophet-platform (authoritative), registered in the contracts validator. - test/admission.test.mjs — advisory-admits / enforce-fails-closed / cli allow+deny / advisory-records-deny-without-blocking / risk classification / receipt conformance + seal. Gated in builder-contract-tests.yml. Existing contract test stays green. Follow-up (deploy): set MEMBRANE_GATE_URL|CMD in the builder env, confirm decisions, then set BUILD_ADMISSION_ENFORCE=true to make governance binding. Closure #2 (point ControlPlaneLifecycle.vue at live evidence bundles) is separate.
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Summary
Closes the biggest governance gap the OS-build survey found: the image-build path is self-governed by
sourceos-speccontracts but never passes through the estate's autonomy-governance fabric — a build could dispatch with no membrane decision on record. This admits every build through the authoritative capability membrane before dispatch and seals the decision into anAutonomyAdmissionReceipt(the same contract the membrane emits estate-wide).Safe to land on a live pipeline
BUILD_ADMISSION_ENFORCE=true. So wiring this cannot break the currently-shipped build loop. Flip enforcement on once the membrane transport is confirmed in the deploy.prophet-platform.Changes
src/services/buildAdmission.ts— compose a membraneCapabilityRequest(surfacesourceos.os-image-build, tier→autonomy level, spec→risk), call the authoritative membrane over a config-driven transport (MEMBRANE_GATE_URLHTTP /MEMBRANE_GATE_CMDCLI: JSON in, decision out, exit 0=allow/3=deny), seal anAutonomyAdmissionReceipt.v0.2.routes/api/builds-route.ts— admit beforedispatchBuild: validate the receipt against the vendored schema, persist it + emitsrcos.builder.admission.decided, and on an enforced deny return403without dispatching.contracts/schemas/AutonomyAdmissionReceipt.v0.2.json(+ PROVENANCE) — vendored from prophet-platform, registered in the contracts validator.test/admission.test.mjs— advisory-admits / enforce-fails-closed / CLI allow+deny / advisory-records-deny-without-blocking / risk / receipt conformance + seal. Gated inbuilder-contract-tests.yml. Existing contract test stays green.Follow-ups
MEMBRANE_GATE_URL|CMDin the builder env, confirm decisions, thenBUILD_ADMISSION_ENFORCE=trueto make governance binding.ControlPlaneLifecycle.vue's evidence-gate view at the live GCS-emitted evidence bundles instead of fixtures.Touches a workflow — flagged for human review; not auto-merging.