Struct FleetState 

pub struct FleetState {
    pub host_states: HashMap<(RolloutId, HostId), HostRolloutState>,
    pub rollouts: HashMap<RolloutId, RolloutSummary>,
    pub outstanding_failing_enforce_probes: HashMap<RolloutId, HashMap<HostId, usize>>,
}

Aggregated view of per-host state the planner consults. Built by the CP runtime from host_rollout_records (Phase 4 schema).

Fields

host_states: HashMap<(RolloutId, HostId), HostRolloutState>

Per-host state, keyed by (rollout_id, hostname). The reducer state is the source of truth; this map is a flat view derived from host_rollout_records via db::HostRolloutRecords::all_for_rollout per active rollout.

rollouts: HashMap<RolloutId, RolloutSummary>

outstanding_failing_enforce_probes: HashMap<RolloutId, HashMap<HostId, usize>>

Per-(rollout, host) outstanding enforce-mode probe failure count. Populated from db::probe_failures::outstanding_failing_enforce_probes_by_rollout at FleetState construction time (RFC-0007 §7.2). Read by the compliance-wave gate; absent entries mean zero failing enforce probes (RFC-0005 §6 — no fail-open fallback).