Host Coupling & Supervisor

supervisor/ plus watchdogs.py keep the runtime alive and keep it from harming the machine it runs on. The design principle: the same host metrics feed three deliberately separate mappings (see Host Coupling for the conceptual view):

1. Absolute floors → reflex. supervisor/host_resources.py (HostResourceGuard) watches disk/swap/memory below cognition and pauses heavy cycles at safety floors — separate from the deliberative loop, because a thrashing loop can't be asked to rescue the substrate it runs on.
2. Deviation from a learned band → control signals. brain/cognition/host_resource_monitor.py, resource_self_monitor.py, host_band.py — so a small or busy machine is not registered as chronic distress.
3. Absolute capacity → cadence. brain/cognition/resource_cadence.py — a small machine runs at a slower cadence, not a degraded one.

Supervisor watchdogs

Started by watchdogs.py (start_watchdogs):

• heartbeatdetector.py — liveness: notices when the loop stops emitting heartbeats.
• error_checker.py / errors.py — error-rate monitoring with an exception ratchet.
• liveness_cycle.py — cycle-progress watchdog.
• lifespan.py — a per-process uptime cutoff that resets on every restart. This is distinct from the runtime-lifetime clock (brain/cognition/runtime_lifetime.py), which is a persistent, finite lifetime budget — see Existence and Lifecycle.
• memory.py — process memory watchdog.
• no_goals.py / repeat.py / trend.py — behavioral guards: no active goals, repetitive behavior, and degrading trends.
• resource_floor.py + resource_floor_calibration.py — the calibrated absolute floors the guard enforces (observe-only until calibrated for the machine).

Calibration on a new machine

brain/cognition/infancy.py learns that machine's normal oscillation before the runtime trusts its own deviation signals, and brain/cognition/host_budget.py exposes a user-facing RAM budget slider that feeds both the cadence policy and the reported "100%".

Code pointers

• supervisor/supervisor.py — assembly
• supervisor/host_resources.py — the reflex guard
• watchdogs.py — watchdog startup
• brain/cognition/host_band.py, resource_cadence.py, infancy.py, host_budget.py