Hub 01 · Agent governance & integrity

How to govern autonomous AI coding agents.

Autonomous delivery needs immutable review targets, append-only database history and data boundaries that fail closed. These controls turn model output into evidence that an integration authority can verify.

How does Nexus review AI-generated code?

Nexus binds independent review to the immutable repository state that produced the submitted evidence. If the code changes, the previous approval no longer applies, preventing one state from being reviewed while another becomes canonical.

Technical article

Exact-SHA Verification vs. Textual Code Review

A review is only reproducible when it identifies the immutable commit that produced the evidence. Nexus binds reviewer assignment, findings, tests and integration eligibility to one exact SHA; a newer branch head is a different review target. This prevents an approved summary from being reused after code changes.

Evidence names the exact commit SHA
Reviewer reads that immutable state
Any code change invalidates the prior approval
Integration checks the same reviewed SHA

Technical article

Protecting PostgreSQL Migration Lineage in Multi-Agent Workflows

Published migration history is an append-only production contract. Nexus compares local migration identity and order against the canonical recorded lineage, then blocks integration when history was rewritten, removed or reordered. Remediation creates a new forward migration instead of silently editing the past.

Hash published migrations
Compare order and identity
Refuse rewritten history
Repair with a forward-only migration

Technical article

Fail-Closed RLS Enforcement for Autonomous Software Workers

Autonomous workers should never infer tenant scope from convenience data. Nexus requires explicit subject and tenant boundaries in the work contract, tests negative cross-tenant cases and refuses integration when row-level security cannot be proven. Missing context produces no access—not broad access.

Explicit tenant and subject context
Negative isolation tests
No privileged fallback path
Blocked integration on uncertain scope

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