Four Hosts, One Engine
Claude Code, Codex and Grok judge the write before disk. Hermes refuses the conclusion instead, because an autonomous agent has nobody to break the loop. What each host does not do is measured and published.
Superpowers
Ten mechanisms. One refusal.
Every one of them exists to close the same gap: between what a model can write and what a codebase can carry.
Iron Law Pattern
Zero drift from your standards.
Every scaffold loads the canonical example first. No guessing, no hallucinating patterns.
The mechanisms
Everything the gate is made of.
Ten of them. You need to understand two: the ratchet, which is why your codebase cannot get worse, and correction learning, which is why you stop repeating yourself. The other eight run without being asked, on whichever agent you use.
Structural Ratchet
A committed baseline holds each file’s structural high-water mark: its worst function’s complexity, its longest function, its suppressions. A file you touch may improve or stay equal, never regress. Untouched legacy is never punished.
Correction Learning
A fix that recurs three times across three files becomes a candidate you approve.
Evidence Gate
“Done” requires proof. A failing test run revokes a verification that already exists, and from 4.14.0 a red test called flaky with no ticket sends the turn back.
Multi-CI Zero Drift
One rule set, four providers, identical to the hooks.
Hostile-Repo Threat Model
Opening a repository is not consenting to run it. A project file can never grant itself permission.
Rules Engine
17 core rules plus everything your pack adds, inherited global to project to directory. Legacy coexists with strict new code.
Adversarial Design Panel
Three contradictors attack a design before any code exists. Every objection lands in a retained or dismissed table.
Iron Law Pattern
Every scaffold loads the canonical example before it writes a line.
Cognitive Bias Detector
Catches acceleration, scope creep and over-optimisation in your prompts, not the model’s.
Free & open source
No seats. No keys. Apache 2.0.
The core gate runs entirely on your machine and costs nothing. Agent hooks are optional and cost cents per session. Two commands, one restart, and the next write is checked.
Install it now