Layer evidence
Unit, schema, policy, authorization, rendering, and configuration tests establish that each part behaves inside its boundary.
Auteur assurance overlay · System integrity
Prove the whole system—not merely the parts.
For multi-agent, multi-repository, reconstructed, financial, regulated, or operationally consequential products where “feature exists” is not the same as “connected, recoverable, deployable, or safe to activate.”
Control 01 · Governed context
Give every source an authority and purpose.
A pile of documentation is not a source of truth. The stack makes it clear which artifact defines destination, product intent, current work, evidence, and release authority.
- 01
North Star
The enduring destination, value, boundaries, and non-negotiable safety conditions.
- 02
Product intent map
The feature families, users, decisions, dependencies, and unresolved judgment.
- 03
Current specifications
Authoritative behavior, architecture, interface, data, and operational requirements.
- 04
Feature matrix
Traceability from intent through layers, tests, gates, status, and next action.
- 05
Task board
The bounded work currently authorized, blocked, under review, or complete.
- 06
Evidence + certification
Observed results supporting integration, deployment, and activation decisions.
Required labels: authoritative, supporting evidence, historical, provisional, superseded, or operational truth. A stale master specification may preserve valuable intent without controlling current implementation.
Control 02 · Feature traceability
Make completeness visible across layers.
The matrix is a read-only synthesis of governed sources. It does not replace specifications, tests, or evidence; it shows where each lives and what remains unproven.
| Feature | Intent + source | Product layers | System layers | Evidence | Safety + status |
|---|---|---|---|---|---|
| Feature family and user outcome | Product intent, authority, governing specs, unresolved assumptions | UI, client state, hooks, client service/API, experience states | Backend API, domain service, data, integration, infrastructure | Unit, contract, integration, end-to-end, operational observation | Risk gates, readiness state, blockers, decision owner, next action |
| Example: execute approved trade | Place only a human-approved order inside explicit risk limits | Review → confirm → submitting → accepted/rejected → reconciled | Auth → risk service → idempotent order API → exchange → ledger | Limit tests, contract tests, sandbox execution, duplicate/retry, reconciliation | Live permission off until independent review and activation approval |
14
New universal principle
Prove the connections.
A table can exist without the service reading it correctly. A service can pass without the API authorizing it correctly. An API can return success while the interface loses the final state. Verify each component with the right test, then verify every contract, state transition, retry, failure, and reconciliation seam.
Seam evidence
Contract, integration, end-to-end, external sandbox, recovery, and reconciliation tests establish that the system behaves together.
Control 03 · Readiness states
Never let “done” hide the remaining risk.
Percent complete compresses unlike evidence into one number. Use discrete states whose transition requires named proof.
Identified→Specified→Implemented→Layer-tested→Integrated→Simulated→Reviewed→Deployable→Live-enabled→Monitored
Evidence moves the state.
Code presence cannot move a feature to integrated. A green simulation cannot move it to live-enabled. Each transition records evidence, reviewer, unresolved risk, and rollback or shutdown path.
Deployment is not authority.
High-consequence capability should deploy disabled, with environment separation, least-privilege credentials, limits, observability, and an explicit human activation decision.
Control 04 · Assurance loop
Apply integrity throughout all five Auteur stages.
This is an overlay, not a sixth sequential stage. Its controls follow the feature from framing through production evidence.
Classify consequence and authority
Identify money, personal data, regulated behavior, operational action, external dependencies, and failure exposure.
Required output
- Risk tier and accountable owner
- Source hierarchy
- Safety invariants
Stop if
- Authority is ambiguous
- No safe test environment exists
- The intended behavior violates a non-negotiable boundary
Trace the vertical feature
Complete the matrix row, connection map, test plan, readiness gates, observability, and recovery design before mutation.
Required output
- Approved feature matrix row
- Contracts and state transitions
- Evidence required for each gate
Stop if
- A required layer has no owner
- Rollback depends on untested assumptions
- Historical behavior is being copied without intent review
Use recoverable checkpoints
Implement coherent slices with verified commits, protected evidence, least privilege, feature flags, and no accidental live authority.
Required output
- Reviewable commits tied to matrix rows
- Updated specifications and decisions
- External versioned backup
Repository rule
- Track authoritative docs and fixtures
- Ignore secrets, derived output, caches, dependencies, and classified private data
- Classify JSONL by purpose; never apply a blanket rule
Test parts, seams, stress, and recovery
Use independent review and consequence-appropriate evidence before advancing readiness.
Required evidence
- Layer and contract tests
- Integration and end-to-end tests
- Failure injection, retry, recovery, and reconciliation
High-consequence evidence
- Sandbox or paper operation
- Capacity and exposure limits
- Kill switch and restore exercise
Reconcile operation with intent
Monitor outcomes, limits, drift, incidents, and external state after every material change.
Required output
- Current matrix status and evidence links
- Post-release reconciliation
- Incident-derived tests and rules
Recurring proof
- Backup restoration succeeds
- Alerts and shutdown controls work
- Permissions and external dependencies remain valid
Applied example · Advanced trading software
A feature can exist long before it is safe to trade.
A complete “execute approved order” slice must cross product, risk, technical, exchange, and operational boundaries.
- 01 · INTENT
Define authority
Only a specifically authorized human or strategy may request an order inside explicit limits.
- 02 · PRODUCT
Make state visible
Show review, approval, submission, acknowledgement, rejection, fill, cancellation, and reconciliation states.
- 03 · RISK
Enforce before exchange
Apply position, price, size, exposure, duplicate, stale-data, and live-mode controls server-side.
- 04 · EXECUTION
Connect idempotently
Use durable identifiers and reconcile uncertain responses instead of blindly retrying.
- 05 · VERIFY
Prove in layers
Run policy tests, API contracts, sandbox orders, retries, partial fills, disconnects, and restart recovery.
- 06 · ACTIVATE
Gate live authority
Deploy disabled; independently review evidence, limits, monitoring, secrets, and kill switch before approval.
Result: “implemented” becomes one early state in an evidence-backed route to controlled operation.
Recovery discipline
Version control is a checkpoint. Backup is a recovery system.
Both need independent failure assumptions and observed restoration evidence.
Checkpoint
- Commit before risky or destructive work
- Commit after a coherent slice passes checks
- Connect commits to decision and evidence
- Avoid clock-based, unverified snapshots as “complete”
Backup
- Automate external versioned copies
- Separate credentials and failure domains
- Monitor missed or corrupt backups
- Include required source, docs, data, and configuration securely
Restore
- Test restoration on a schedule
- Measure recovery point and recovery time
- Practice manual or alternate operation
- Record defects as new controls
Evidence and boundary
A practical product overlay—not a compliance certification.
The controls are informed by established secure-development, contingency, and algorithmic-system guidance. Teams remain responsible for the laws, controls, and qualified reviews applicable to their system.
NIST SSDF
Risk-based secure development, protected software, provenance, tracked requirements, and continuous response.
Review the SSDF source ↗NIST backup guidance
Backups integrated with change management, created regularly, tested, and reviewed through recovery exercises.
Review the backup source ↗FINRA algorithmic systems
Risk assessment, controlled development, pre-production validation, operational review, and cross-functional supervision.
Review the trading source ↗Apply the overlay
Open the direction brief →Start with one feature row—not the whole suite at once.
Choose a consequential vertical slice, trace every layer and seam, define the evidence gates, and use what it reveals to improve the rest of the system.