Platform Extension Review and Certification¶

Review — instantiates Platform Core / Extension Design

A risk-tiered gate that combines automated evidence with human judgment to certify an extension safe and compatible enough to admit — with the depth of scrutiny scaled to the potential harm.

Not every extension deserves the same scrutiny, and no checklist can settle the questions that matter most. Platform Extension Review and Certification is the admission gate that decides whether an extension may be published, and at what assurance tier — and its defining move is that scrutiny is proportional to consequence. A read-only widget self-attests and passes on automated evidence alone; an extension that can cause real harm gets deep certification with a human in the loop. It consumes machine-checkable conformance evidence and adds judgment on the things automation cannot reach — novel risks, conflicts of interest, "is this actually safe" — and it produces a verdict with conditions, not a datastore or a runtime guarantee.

Example¶

A vehicle-software platform lets suppliers ship driving-assist extensions, and reviews them against the functional-safety standard ISO 26262. A submitted lane-keeping extension can actuate steering, so it lands in the highest risk tier (illustratively ASIL D): full certification, with a human safety engineer reviewing the hazard analysis and the evidence of freedom-from-interference, and approval granted only with conditions attached. A cabin ambient-lighting extension submitted the same week can do almost nothing dangerous; it sits in the lowest tier, clears mostly automated checks plus self-attestation, and ships in days. When the lane-keeping vendor later changes how steering torque is requested — a material change — that recertification trigger sends it back through review rather than letting the old certificate cover new behavior.

How it works¶

What distinguishes this gate from the artifacts it relies on:

Risk tiering first — map each extension's potential consequence to a depth of scrutiny (self-attest → automated → reviewed → certified), so effort tracks harm, not paperwork.
Automated evidence, then human judgment — the machine-checkable parts are gathered up front; reviewers spend their attention only on what can't be automated.
Verdict with conditions — approve, approve-with-conditions, or reject, each with stated reasons, an appeal path, and recusal where the operator competes with the submitter.
Recertification triggers — a new permission, a major version, or an incident forces re-review, because a certificate is a snapshot, not a warranty.

Tuning parameters¶

Risk-tier thresholds — where the cutlines between self-attest, automated, and full certification fall. Lower thresholds catch more harm but throttle the ecosystem and back up the queue.
Automation-to-judgment ratio — how much rides on automated evidence versus reviewer discretion; more automation scales but misses the novel.
Conditionality — approve outright, approve-with-conditions, or admit on probation with monitoring.
Recertification triggers — which changes force a fresh pass, and how sensitive those triggers are.
Reviewer independence — the strength of recusal and conflict-of-interest controls, most load-bearing when the operator ships competing extensions of its own.

When it helps, and when it misleads¶

Its strength is proportionate assurance: it concentrates scarce human scrutiny on the extensions that can actually hurt someone, and it catches the failures — deception, subtle unsafety, conflicts — that no automated suite will flag.

Its failure modes are sharp. Certification theater — a rubber-stamp that produces a badge without real examination — is worse than no gate, because the badge is trusted. And "passed pre-release review" quietly gets read as "safe forever," when runtime responsibility never transfers to the certificate. The classic misuse is running the gate backwards: writing criteria to justify admitting a favored (often first-party) extension, or applying scrutiny selectively to competitors. The discipline that keeps it honest is the ISO-26262-style principle that review depth scales with hazard^[1], enforced through transparent criteria, recusal, and stated reasons rather than operator preference.

How it implements the components¶

platform_compatibility_and_conformance_policy — the gate applies the conformance policy as an admission criterion, certifying (self-attested, reviewed, or fully certified by tier) that an extension meets what the platform requires it to preserve.
platform_security_quality_and_safety_guardrail — it is where the threat and harm model, minimum controls, and risk tiers are adjudicated before release, with human judgment on residual risk.

It does not generate the automated conformance evidence — that is Platform Conformance Test Suite, which it consumes. It does not record the resulting status ([Platform Plugin and Extension Registry]) or contain a bad extension at runtime ([Platform Sandbox and Capability Permissions]), and ecosystem-wide policy authority sits with Platform Ecosystem Change Council.

Instantiates: Platform Core / Extension Design — the review gate is where an extension is judged fit to admit.
Consumes: Platform Conformance Test Suite supplies the automated evidence the gate builds its judgment on.
Sibling mechanisms: Platform Plugin and Extension Registry · Platform Conformance Test Suite · Platform Sandbox and Capability Permissions · Platform Extension Manifest · Platform API and SDK · Platform Architecture Blueprint · Platform Capability Catalog and Portal · Platform Ecosystem Change Council · Platform Extension Health and Dependency Dashboard · Platform Reference Implementation · Platform Semantic Versioning and Release Train · Platform Migration and Deprecation Tooling

Notes¶

Certification is a point-in-time judgment, not a standing guarantee. Because passing the gate never eliminates runtime responsibility, review only works when it is paired with runtime containment ([Platform Sandbox and Capability Permissions]) and ongoing monitoring (Platform Extension Health and Dependency Dashboard) — the certificate opens the door; the other two watch what happens after.

References¶

[1] ISO 26262 defines Automotive Safety Integrity Levels (ASIL A–D) that scale the required rigor to a hazard's severity, exposure, and controllability. It is used here only to illustrate risk-tiered scrutiny — depth of review set by potential harm rather than by uniform process. ↩