{
  "schema": "dispatch_gate.fixture.prompt_3901_block.v1",
  "description": "회장 verbatim §17.15 — 3901 bytes prompt MUST be blocked regression. >3900 bytes HARD_BLOCK + 자동 path-only compact mode 전환.",
  "input": {
    "prompt_byte_length": 3901,
    "synthesis": "filler text — UTF-8 bytes target 3901 (regression 측정값, 3900 한도 + 1)"
  },
  "expected": {
    "verdict": "HARD_BLOCK",
    "allowed": false,
    "warning": false,
    "hard_block": true,
    "channel_overflow": false,
    "requires_compact_mode": true
  }
}