Independence by construction
The reviewer receives the captured change and policy contract, not the authoring agent's persuasive summary of why its own work is correct.
INDEPENDENT AI CODE REVIEWER
A second model should be
a second engineering authority.
2nd Engineer places an independent, read-only model behind a deterministic assurance gate. It reviews a neutral snapshot, returns evidence and cannot silently edit or approve its own recommendation.
Different modelRead-only reviewerImmutable snapshotEvidence required
THE CONTROL GAP
AI review needs more than another opinion.
Read-only by default
The reviewer cannot silently edit, merge, commit, revert or release. Recommendations return to the owner and authoring workflow as evidence.
Findings must be usable
A material block needs concrete repository evidence, a stated consequence and a verification step. Confidence scores alone do not advance trust.
Late evidence is quarantined
If code, policy, owner mode or captured context changes while review is running, the result is marked stale rather than reused.
HOW 2ND ENGINEER WORKS
Assurance that follows the change.
2nd Engineer governs when a second model is called, what exact state it receives, what evidence it must return and who has authority to decide.
- 1
Create a protected snapshot
Git state, allowed files and policy are captured; ignored credentials and suspected secret material are excluded.
- 2
Invoke the independent reviewer
The selected reviewer receives a bounded, read-only contract through its protected transport.
- 3
Validate response quality
2nd Engineer checks that blocking findings are grounded, actionable and tied to the review subject.
- 4
Return authority to the owner
The record shows the verdict, evidence, exact fingerprint and current-or-stale status for an accountable decision.
AI CHANGE ASSURANCE
Give every consequential change an independent engineering checkpoint.
Start with one team, one policy and a reversible author-reviewer workflow.