2.1 Hard validation gates
2.1 Hard validation gates (max 2)
violations of deterministic code-quality rules (lint, typecheck, format; e.g. Biome, ESLint, SwiftLint) cannot reach the protected branch undetected. Enforcement happens at multiple checkpoints with the same ruleset across layers, so no surprise surfaces between them, and bypassing an earlier checkpoint is caught by a later one
Levels
Level 0
No enforcement at any checkpoint; violations routinely reach merge
Level 1
Partial enforcement — rules enforced at one checkpoint (typically CI at merge) but not at earlier ones; a developer bypassing that checkpoint can land violations before review
Level 2
Enforcement at multiple checkpoints (commonly pre-commit hooks + CI, also valid: pre-push + CI, merge queue + CI, pre-receive server-side hook + CI) with consistent ruleset across layers; bypass at any earlier checkpoint is caught by a later one, so violations cannot reach the protected branch undetected
Level 3
Not applicable — this criterion caps at level 2.
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