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New 'Behavior' stage between Gate and Milestone, frontend-phase only, after testGate green and before report/milestone. Verifies every interactive control actually works and every text region shows the right content, independent of the tests the tdd agent wrote. - BEHAVIOR_GATE_SCHEMA / behaviorGateContract() / behaviorGatePrompt() / runBehaviorGate(); reportPrompt now gates the milestone on behavior-gate evidence (frontend-phase-behavior-gate-r*.md, last attempt must be non-RED). - Two-tier failure: interaction defects (incl. binding-garbage) flake-retry once then hard-halt via adjudicate(allowContinue:false); text issues split by source (sentinel=objective -> no continue; i18n/literal/semantic=adjudicable). Convergence loop re-runs the env + interaction hard gates after any text-layer retry so a refreshed result can't slip a green past the hard gates. - Full-stack seeded run: test-DB name guard (deterministic halt, not adjudicated), strict 4-phase ordering (empty DB -> boot backend so Flyway builds schema -> seed -> boot frontend), auth bootstrap via storageState, router-config-driven route discovery, ephemeral .tmp/behavior-gate runner with finally teardown, type-legal per-field-unique sentinels. - agentType uses the plugin-namespaced 'erp-workflow:code-reviewer' (a bare 'code-reviewer' is ambiguous with feature-dev:code-reviewer); README + agents/code-reviewer.md aligned (frontmatter name: stays bare). - Design: docs/design/2026-06-02-frontend-behavior-gate.md. README + coding-start banner updated.