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Stateful journeys/Governed SkyDNN inference review/Workshop
Advanced2 hr 10 min8 implementation labs5 hostile paths

Build Governed SkyDNN inference review

An eight-lab, source-bounded workshop for the complete vision evidence case lifecycle: exact commands and events, durable records, replay, concurrency, unknown outcomes, hostile fixtures, a maintained capstone, and production exit evidence.

Durable boundaryvision evidence case · 8 states · 8 transitions · 8 event identities
Application-owned workshop

Freeze the evidence boundary first

This curriculum teaches the durable host workflow around reviewed Mappls surfaces. It does not manufacture provider endpoints, callbacks, resource states, entitlement, or completion evidence.

The journey blueprint and application event contracts are implementation guidance, not Mappls provider payload specifications.Only linked normalized contracts and source guides may define provider request syntax; empty evidence is never backfilled.The simulator and maintained capstone operate in explicit fixture mode and make no entitlement claim.Credentials, precise production payloads, opaque native objects, and provider secrets stay outside workshop inputs and durable examples.
Lab 1 · 15 min

Model the lifecycle before the UI

Turn the vision evidence case blueprint into an explicit aggregate boundary owned by the application.

Build

registered: The application owns a purpose-bound case with opaque asset identity, SHA-256 content hash, media facts, capture time, location context, lawful-basis reference, and retention deadline.model_locked: An entitled server-discovery result and one exact API model key, fingerprint, class vocabulary, and policy version are frozen for the case.inference_requested: One worker owns an idempotent synchronous provider-call attempt against the exact asset and model identities.inferred: A schema-valid provider response has normalized labels, confidence, bounded geometry, timing, provenance, and response hash without becoming a business decision.review_pending: Versioned policy places the immutable result in an uncertainty, sensitive-class, or mandatory-sampling review lane.accepted: An independent reviewer accepted the derived evidence for the declared purpose and exact policy/model/output versions.rejected: An independent reviewer rejected the result with an attributable reason while retaining the immutable provider evidence.redacted: Derived labels and geometry were removed at the retention deadline while the minimum decision, hashes, policy, and audit record remain.

Prove before continuing

Every persisted state exists in the reviewed blueprint.Terminal states reject ordinary forward commands.Recovery text is operational guidance, not another hidden state.
Lab 2 · 20 min

Implement every command and event pair

Make intent, actor authority, allowed source state, committed state, and emitted fact reviewable together.

Build

register_case by Asset steward: new aggregate → registered; emit vision.case_registered.lock_model by Vision worker: registered → model_locked; emit vision.model_locked.request_inference by Vision worker: model_locked → inference_requested; emit vision.inference_requested.record_inference by Vision worker: inference_requested → inferred; emit vision.inference_recorded.submit_review by Policy service: inferred → review_pending; emit vision.review_requested.accept by Independent reviewer: review_pending → accepted; emit vision.accepted.reject by Independent reviewer: review_pending → rejected; emit vision.rejected.redact by Privacy worker: inferred | review_pending | accepted | rejected → redacted; emit vision.redacted.

Prove before continuing

register_case resolves to vision-inference-review-vision-case-registered without claiming a provider webhook payload.lock_model resolves to vision-inference-review-vision-model-locked without claiming a provider webhook payload.request_inference resolves to vision-inference-review-vision-inference-requested without claiming a provider webhook payload.record_inference resolves to vision-inference-review-vision-inference-recorded without claiming a provider webhook payload.submit_review resolves to vision-inference-review-vision-review-requested without claiming a provider webhook payload.accept resolves to vision-inference-review-vision-accepted without claiming a provider webhook payload.reject resolves to vision-inference-review-vision-rejected without claiming a provider webhook payload.redact resolves to vision-inference-review-vision-redacted without claiming a provider webhook payload.
Lab 3 · 15 min

Persist restart-safe records

Separate business identity, provider evidence, command receipts, immutable facts, audit, and downstream delivery.

Build

Vision case: Business purpose, external identity, lifecycle, policy, retention, and optimistic version. Keys: caseId, externalId, purpose, state, version, policyVersion, retentionUntil.Asset envelope: Opaque, non-media identity and integrity facts for one captured source. Keys: assetRef, sha256, mediaClass, width, height, capturedAt, lawfulBasisRef.Model lock: Exact entitled discovery evidence and immutable model selection. Keys: serverRef, apiModelKey, modelFingerprint, classes, lockedAt.Inference attempt: Synchronous request lifecycle, normalized response, safe failure, timing, and provenance. Keys: attemptId, assetHash, modelFingerprint, status, resultHash, regions, timings.Review and retention: Policy reasoning, attributable disposition, and derived-detail redaction evidence. Keys: reviewId, reasonCodes, reviewer, decision, redactedAt.Audit and outbox: Append-only state evidence and exactly-once-in-effect downstream notification. Keys: eventId, aggregateVersion, idempotencyKey, actor, outboxStatus.

Prove before continuing

Process restart restores the same aggregate version and command result.Opaque SDK or native UI objects are not durable records.Provider evidence and application decisions remain distinguishable.
Lab 4 · 15 min

Make concurrency and replay deterministic

Apply optimistic expected versions and aggregate-scoped idempotency before executing effects.

Build

No image bytes, media URL, bearer token, credential, face, number plate, or provider-internal file path enters the reference case store.The provider POST /predict call is synchronous; application queue, review, retry, decision, and retention states are never attributed to SkyDNN.Every attempt binds an immutable asset hash to one discovered model fingerprint and policy version.Confidence and geometry are evidence, not a business outcome or live safety command.Reviewer identity is independent from the fixture inference actor and every override or rejection has a reason.Idempotency, optimistic versions, audit, receipts, and outbox commit atomically.

Prove before continuing

An exact replay returns the first result without another event or version.A reused key with different intent conflicts.A stale expected version changes no durable truth.
Lab 5 · 15 min

Control effects and unknown outcomes

Commit outbox intent atomically, execute effects outside the transaction, and reconcile ambiguous results.

Build

Model discovery changes after the case is prepared: detect with Current metadata fingerprint differs from the locked fingerprint. Recover with Stop, create a new model lock and attempt, and retain the original lock for comparison.Provider response is lost after a synchronous request: detect with The active attempt has no terminal response hash and transport outcome is ambiguous. Recover with Reconcile with the approved provider boundary when possible or record a safe failed attempt before a deliberate linked retry.Geometry, label, or confidence is malformed: detect with Schema, bounds, topology, vocabulary, or numeric validation fails. Recover with Quarantine derived detail, retain a safe error class, and do not send it to policy or review.Sensitive or uncertain inference reaches policy: detect with A privacy class, low confidence, unsupported label, or mandatory sample rule matches. Recover with Require independent review and prevent automation from issuing a terminal business or safety action.Retention deadline passes while review is open: detect with Derived output remains present after the committed policy deadline. Recover with Redact on schedule, close or fail the review with explicit expiry, and retain minimum audit evidence.Process restarts after a command timeout: detect with The client lacks acknowledgement while snapshot, receipt, audit, and outbox are durable. Recover with Reload and replay the same idempotency key without duplicating attempts, decisions, or events.

Prove before continuing

A timeout remains an unknown outcome until identity-based reconciliation completes.Retries are bounded and preserve the original business and command identities.Dead-letter or manual review retains the entire attempt history.
Lab 6 · 15 min

Run all hostile fixture scenarios

Exercise the success path plus replay, concurrency, state, and response-loss failures without an account.

Build

Complete journey: Commit the shortest reviewed success path to the journey-specific operating target.Idempotent replay: Repeat one command identity and prove that version, event identity, and side effects do not duplicate.Stale version: Reject a command based on an outdated aggregate version without changing durable truth.Invalid transition: Reject a known command when the current state does not permit it.Unknown outcome recovery: Reconcile after a lost response, then replay the original command identity safely.

Prove before continuing

All fixture checks pass for all five scenarios.Rejected commands emit no event and do not increment version.The fixture makes zero provider calls and exposes no write tool.
Complete journeyIdempotent replayStale versionInvalid transitionUnknown outcome recovery
Lab 7 · 20 min

Trace the Vision Evidence Desk capstone

Follow the maintained source through domain rules, adapter seam, repository transaction, HTTP boundary, UI evidence, and restart test.

Build

Run the app's declared test suite (10 tests).Run fixture mode without a credential.Inspect audit and outbox evidence after each transition.Restart the process and continue the same aggregate.

Prove before continuing

The downloadable archive checksum verifies before execution.The capstone covers the journey target without inventing provider completion.Browser and HTTP surfaces report the same durable version.
Inspect Vision Evidence DeskDownload sourceVerify SHA-256
Lab 8 · 15 min

Qualify the real integration boundary

Replace only reviewed adapter seams and collect independent production evidence without weakening application invariants.

Build

Cases by state, purpose, media class, model fingerprint, and policy versionModel discovery drift, lock age, and incompatible input rateInference latency, safe error class, result-schema rejection, and ambiguous outcomeConfidence, label, geometry type, and review-reason distributionsReview queue age, disposition, override, disagreement, and sampling coverageSensitive-class access and derived-output retention/redaction deadlinesIdempotency replay, version conflict, restart recovery, audit, and outbox age

Prove before continuing

Exact product entitlement and regional behavior are validated separately.Provider contract tests cover success, rejection, throttling, timeout, and unknown outcome.Security, privacy, operations, rollback, and product owners approve exact evidence.Fixture completion is never presented as provider or production completion.
Copy, run, then adapt

Application-owned reliability scaffolds

The aggregate and SQL examples implement host truth; the fixture clients call the credential-free Journey Lab. Replace only the separately reviewed provider adapter seam.

Governed SkyDNN inference review workshop scaffolds
type State = "registered" | "model_locked" | "inference_requested" | "inferred" | "review_pending" | "accepted" | "rejected" | "redacted";
type CommandName = "register_case" | "lock_model" | "request_inference" | "record_inference" | "submit_review" | "accept" | "reject" | "redact";

type Command = {
  name: CommandName;
  aggregateId: string;
  expectedVersion: number;
  idempotencyKey: string;
};

const transitions = {
  "register_case": { from: [null], to: "registered", event: "vision.case_registered" },
  "lock_model": { from: ["registered"], to: "model_locked", event: "vision.model_locked" },
  "request_inference": { from: ["model_locked"], to: "inference_requested", event: "vision.inference_requested" },
  "record_inference": { from: ["inference_requested"], to: "inferred", event: "vision.inference_recorded" },
  "submit_review": { from: ["inferred"], to: "review_pending", event: "vision.review_requested" },
  "accept": { from: ["review_pending"], to: "accepted", event: "vision.accepted" },
  "reject": { from: ["review_pending"], to: "rejected", event: "vision.rejected" },
  "redact": { from: ["inferred", "review_pending", "accepted", "rejected"], to: "redacted", event: "vision.redacted" },
} as const;

export function decide(current: { state: State | null; version: number }, command: Command) {
  const rule = transitions[command.name];
  if (command.expectedVersion !== current.version) throw new Error("version_conflict");
  if (!rule.from.includes(current.state as never)) throw new Error("invalid_transition");
  return {
    state: rule.to as State,
    version: current.version + 1,
    event: rule.event,
    idempotencyKey: command.idempotencyKey,
  };
}

// Persist the result, immutable event, audit row, and outbox intent atomically.
// Store the first result by idempotencyKey before executing another effect.
Definition of done

Exit with reviewable evidence

All 8 reviewed transitions are implemented with actor and source-state checks.All 8 application event identities are immutable and versioned.Exact replay, idempotency conflict, stale version, invalid transition, and unknown outcome are tested.Aggregate, event, audit, command result, and outbox intent commit atomically.The Vision Evidence Desk capstone passes 10 declared tests after archive checksum verification.Provider entitlement, payload, callback, completion, and production behavior remain independently evidenced.
Workshop completion is not production authority

Workshop completion proves an application-owned reliability design only. Production still requires issued entitlement, exact adapter contract tests, regional and quota validation, security/privacy review, operational drills, and independent release approval.

Canonical evidence

Trace every external claim to an indexed source

Workshop evidence ready

Break the application before connecting the provider.

Run all five hostile scenarios and the maintained capstone test suite. Then qualify the exact provider seam under independently reviewed non-production entitlement.