nx_gate_sentinel.nx

nx_gate_sentinel.nx -- TEAM-OWNED watchdog over nx_game_gate (operator: "keep building the team to handle the ask"). Runs the gate, compares the fails count against the recorded baseline, and reacts WITHOUT Claude: fails > baseline -> REGRESSION: escalate to the PM review log (pm_gap) fails < baseline -> IMPROVEMENT: record a deliverable line fails == baseline -> STEADY: quiet (one SENTINEL line in the gate log) Baseline auto-updates after every report so each CHANGE escalates exactly once (no spam, no silent drift). This is the loop-monitor pattern from [[project-self-running-loop-governed-ingest-2026-06-05]] applied to the game-engine substrate: the gate produces evidence, the sentinel watches it, the PM log receives the escalation -- grades stay LIVE with no LLM in the loop. Usage (from nxc2 repo root): nx_gate_sentinel.elf # gate with default _offc compiler nx_gate_sentinel.elf /path/to/nx_cc.elf # gate a candidate compiler Exit: 0 steady/improvement/init, 1 regression, 2 gate-missing/crashed. license_tier: ORIGINAL