docs: record live medium failover evidence

cmd/cognitive-worker/fleet_status_test.go

@@ -9,7 +9,7 @@ import (
 	"git.cin.su/m/Assistant/contracts/capability"
 )
 
-func TestFleetReadinessSelectsLifeboatWhenPrimaryTiersUnavailable(t *testing.T) {
+func TestFleetReadinessSelectsBestAvailablePrimaryTierBeforeLifeboat(t *testing.T) {
 	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, _ *http.Request) { w.WriteHeader(http.StatusOK) }))
 	defer server.Close()
 	handler := fleetReadinessHandler(server.Client(), capability.FleetTierHeavy, []fleetEndpoint{
@@ -21,7 +21,7 @@ func TestFleetReadinessSelectsLifeboatWhenPrimaryTiersUnavailable(t *testing.T)
 	recorder := httptest.NewRecorder()
 	request := httptest.NewRequest(http.MethodGet, "/v1/fleet/readiness", nil)
 	handler.ServeHTTP(recorder, request)
-	if recorder.Code != http.StatusOK || !strings.Contains(recorder.Body.String(), `"selected_tier":"LIFEBOAT"`) || !strings.Contains(recorder.Body.String(), `"tier":"MEDIUM"`) {
+	if recorder.Code != http.StatusOK || !strings.Contains(recorder.Body.String(), `"selected_tier":"FAST"`) || !strings.Contains(recorder.Body.String(), `"tier":"MEDIUM"`) {
 		t.Fatalf("status=%d body=%s", recorder.Code, recorder.Body.String())
 	}
 }

deploy/docker-compose.prod.yml

@@ -214,7 +214,7 @@ services:
       LOCAL_CPU_PROVIDER_URL: http://docker.cin.su:18082/v1
       LOCAL_CPU_PROVIDER_API_KEY_FILE: ${LOCAL_CPU_PROVIDER_API_KEY_FILE:-}
       LOCAL_CPU_PROVIDER_CREDENTIAL_REF: ${LOCAL_CPU_PROVIDER_CREDENTIAL_REF:-credential://domovoy/local-cpu/provider-api-key/v1}
-      LOCAL_MEDIUM_PROVIDER_URL: ${LOCAL_MEDIUM_PROVIDER_URL:-}
+      LOCAL_MEDIUM_PROVIDER_URL: ${LOCAL_MEDIUM_PROVIDER_URL:-http://llm-local-api:8080/v1}
       LOCAL_MEDIUM_PROVIDER_API_KEY_FILE: ${LOCAL_MEDIUM_PROVIDER_API_KEY_FILE:-}
       LOCAL_MEDIUM_PROVIDER_CREDENTIAL_REF: ${LOCAL_MEDIUM_PROVIDER_CREDENTIAL_REF:-credential://domovoy/local-medium/provider-api-key/v1}
       LOCAL_LIFEBOAT_PROVIDER_URL: http://cognitive-lifeboat:8086/v1
@@ -224,6 +224,7 @@ services:
     depends_on: [core-runtime, cognitive-lifeboat]
     volumes:
       - assistant_core_secrets:/run/secrets:ro
+    networks: [default, llm-local]
 
   cognitive-lifeboat:
     image: ghcr.io/ggml-org/llama.cpp:server
@@ -290,3 +291,8 @@ volumes:
     external: true
   assistant_research_sources:
     name: assistant_research_sources
+
+networks:
+  llm-local:
+    external: true
+    name: llm-local_default

dev/ACTIVE_TASK.json

@@ -1,5 +1,5 @@
 {
-  "task_file": "dev/tasks/DEV-000170-refresh-fleet-audit-evidence.json",
-  "task_id": "DEV-000170",
+  "task_file": "dev/tasks/DEV-000173-refresh-medium-failover-evidence.json",
+  "task_id": "DEV-000173",
   "task_revision": 1
 }

dev/tasks/DEV-000171-connect-existing-medium-runtime.json

@@ -0,0 +1,23 @@
+{
+  "task_id": "DEV-000171",
+  "task_revision": 1,
+  "architecture_revision": "ADR-0018",
+  "base_repo_revision": "503fe840741ac99499e06bd93df977acf1baad41",
+  "risk_tier": "E",
+  "intent": "Connect cognitive-worker to the already-operated llm-local CPU model runtime as the configured MEDIUM fleet member through an explicit external Docker network.",
+  "requirement_ids": ["WP-200", "WP-301", "Model fleet/failover"],
+  "allowed_change_scope": {"modules": ["deployment-topology", "cognitive-worker"], "paths": ["deploy/docker-compose.prod.yml", "dev/ACTIVE_TASK.json", "dev/tasks/DEV-000171-connect-existing-medium-runtime.json"]},
+  "forbidden_change_scope": {"paths": ["architecture/**", "security/**", "database/**", "contracts/**", "adapters/**", ".gitea/**"]},
+  "allowed_architecture_delta": {"new_cross_module_dependencies": 0, "new_canonical_owners": 0, "new_privileges": 1, "new_third_party_dependencies": 0, "new_database_owner_roles": 0},
+  "contracts": {"consume": ["existing OpenAI-compatible local provider adapter", "existing MEDIUM fleet readiness contract", "existing llm-local Docker network"], "may_change": []},
+  "semantic_owner": "deployment topology/cognitive-worker registration",
+  "canonical_state": [],
+  "state_transitions": ["MEDIUM unconfigured -> live provider discovery/readiness", "preferred HEAVY unavailable -> highest available fallback selection"],
+  "side_effects_and_privileges": ["one explicit read-only network attachment from cognitive-worker to existing llm-local runtime; no secret or database privilege added"],
+  "persistence_and_migrations": ["none"],
+  "failure_retry_restart": ["if external llm-local network is absent deployment fails closed; provider timeout remains bounded; Lifeboat remains fallback"],
+  "assumptions": ["production llm-local_default network and llm-local-api are independently operated and present", "llm-local-api exposes OpenAI-compatible /v1/models and chat routes on port 8080"],
+  "acceptance_scenarios": ["compose config validates with external network declaration", "cognitive-worker resolves llm-local-api", "MEDIUM fleet member is AVAILABLE live", "runtime /readyz remains 200", "Lifeboat fallback remains available", "no secret value is added"],
+  "required_tests": ["docker compose config", "go test ./...", "go vet ./...", "preflight", "check-diff", "check-architecture", "independent", "git diff --check", "CI", "production /readyz and fleet readiness"],
+  "terminal_gap_states": ["BLOCKED_BY_MISSING_CAPABILITY", "BLOCKED_BY_CONFLICT"]
+}

dev/tasks/DEV-000172-fleet-failover-priority.json

@@ -0,0 +1,23 @@
+{
+  "task_id": "DEV-000172",
+  "task_revision": 1,
+  "architecture_revision": "ADR-0018",
+  "base_repo_revision": "2c7a85779b530e3147fbf47b71742759cc010d58",
+  "risk_tier": "E",
+  "intent": "Make fleet failover choose the best available non-Lifeboat tier below the preferred tier before using Lifeboat.",
+  "requirement_ids": ["WP-301", "Model fleet/failover"],
+  "allowed_change_scope": {"modules": ["capability", "cognitive-worker"], "paths": ["modules/capability/domain/fleet.go", "modules/capability/domain/fleet_test.go", "cmd/cognitive-worker/fleet_status_test.go", "dev/ACTIVE_TASK.json", "dev/tasks/DEV-000172-fleet-failover-priority.json"]},
+  "forbidden_change_scope": {"paths": ["architecture/**", "security/**", "database/**", "deploy/**", "contracts/**", "adapters/**", ".gitea/**"]},
+  "allowed_architecture_delta": {"new_cross_module_dependencies": 0, "new_canonical_owners": 0, "new_privileges": 0, "new_third_party_dependencies": 0, "new_database_owner_roles": 0},
+  "contracts": {"consume": ["existing FleetReadiness contract", "existing FleetTier selection contract"], "may_change": []},
+  "semantic_owner": "capability",
+  "canonical_state": [],
+  "state_transitions": ["preferred unavailable -> next lower ready tier -> Lifeboat fallback"],
+  "side_effects_and_privileges": ["none"],
+  "persistence_and_migrations": ["none"],
+  "failure_retry_restart": ["selection remains deterministic from observed readiness; invalid preferred tier fails closed"],
+  "assumptions": ["HEAVY > MEDIUM > FAST is the quality/capability fallback order; LIFEBOAT is last-resort recovery"],
+  "acceptance_scenarios": ["HEAVY unavailable and MEDIUM ready selects MEDIUM", "HEAVY and MEDIUM unavailable and FAST ready selects FAST", "all primary tiers unavailable selects Lifeboat", "invalid preferred tier is rejected"],
+  "required_tests": ["go test ./...", "go vet ./...", "preflight", "check-diff", "check-architecture", "independent", "git diff --check", "CI", "production fleet readiness"],
+  "terminal_gap_states": ["BLOCKED_BY_MISSING_CAPABILITY", "BLOCKED_BY_CONFLICT"]
+}

dev/tasks/DEV-000173-refresh-medium-failover-evidence.json

@@ -0,0 +1,23 @@
+{
+  "task_id": "DEV-000173",
+  "task_revision": 1,
+  "architecture_revision": "ADR-0018",
+  "base_repo_revision": "64642f4baed28f9051efe6a269769c5838b547e4",
+  "risk_tier": "E",
+  "intent": "Refresh audit and production evidence after live MEDIUM runtime availability and deterministic fleet failover priority are deployed.",
+  "requirement_ids": ["AUDIT-COMPLETION-TRUTH", "WP-200", "WP-301"],
+  "allowed_change_scope": {"modules": [], "paths": ["docs/evidence/audit-completion-matrix-2026-08-22-v1.json", "docs/evidence/wp-200-wp-301-fleet-execution-status-2026-08-22-v3.json", "docs/PROJECT_STATUS.md", "dev/ACTIVE_TASK.json", "dev/tasks/DEV-000173-refresh-medium-failover-evidence.json"]},
+  "forbidden_change_scope": {"paths": ["architecture/**", "security/**", "cmd/**", "modules/**", "contracts/**", "adapters/**", "database/**", "deploy/**", ".gitea/**"]},
+  "allowed_architecture_delta": {"new_cross_module_dependencies": 0, "new_canonical_owners": 0, "new_privileges": 0, "new_third_party_dependencies": 0, "new_database_owner_roles": 0},
+  "contracts": {"consume": ["live fleet readiness evidence", "audit completion matrix"], "may_change": []},
+  "semantic_owner": "none; audit evidence projection",
+  "canonical_state": [],
+  "state_transitions": ["stale evidence -> current MEDIUM/failover evidence"],
+  "side_effects_and_privileges": ["none"],
+  "persistence_and_migrations": ["immutable JSON evidence artifacts only"],
+  "failure_retry_restart": ["not applicable"],
+  "assumptions": ["live probes were captured after production deployment of 64642f4b", "availability is not interpreted as qualification or activation"],
+  "acceptance_scenarios": ["production revision is current", "MEDIUM model catalog and readiness are recorded", "preferred HEAVY falls back to MEDIUM", "remaining bridge/GPU/browser gaps remain explicit", "no secret value appears"],
+  "required_tests": ["JSON validation", "go test ./...", "go vet ./...", "preflight", "check-diff", "check-architecture", "independent", "git diff --check", "CI"],
+  "terminal_gap_states": ["BLOCKED_BY_MISSING_CAPABILITY", "BLOCKED_BY_CONFLICT"]
+}

docs/PROJECT_STATUS.md

@@ -2,12 +2,12 @@
 
 ## Current audit delta — 2026-08-22
 
-- `CURRENT_PRODUCTION_REVISION = 51427a246e1ccc115a6c2640790d9220beca95e9`; public `/healthz` is healthy.
+- `CURRENT_PRODUCTION_REVISION = 64642f4baed28f9051efe6a269769c5838b547e4`; public `/healthz` is healthy.
 - `FAST_PROVIDER_STATUS = LIVE_SMOKE_SUPPORTED`: local CPU gateway authentication is configured through a protected file reference; four bounded local-only advisory cases completed through cognitive-worker. Evidence: `docs/evidence/wp-601-fast-gateway-live-smoke-2026-08-22-v1.json`.
-- `MEDIUM_PROVIDER_STATUS = CONFIGURABLE_NOT_CONFIGURED`; the optional OpenAI-compatible MEDIUM slot, protected CredentialRef file path, discovery and readiness wiring are deployed; no medium runtime is supplied in production.
+- `MEDIUM_PROVIDER_STATUS = LIVE_AVAILABLE`; existing llm-local Qwen3.6-27B CPU runtime is reachable through the explicit external Docker network and reports a loaded model; qualification/activation remains separate.
 - `HEAVY_PROVIDER_STATUS = UNAVAILABLE`; GPU endpoint `192.168.220.91:11434` timed out during live discovery.
 - `AGENT_EXECUTION_STATUS = RECOVERY_ONLY`; optional `AGENT_EXECUTION_BRIDGE_URL` is wired into production compose but remains unset, and no Codex/bridge runtime is deployed. Durable recovery and status endpoints remain active.
-- `FLEET_EXECUTION_EVIDENCE = docs/evidence/wp-200-wp-301-fleet-execution-status-2026-08-22-v2.json`; FAST and LIFEBOAT are ready, MEDIUM is NOT_CONFIGURED, Heavy is unavailable by timeout, and current selection is LIFEBOAT for preferred HEAVY.
+- `FLEET_EXECUTION_EVIDENCE = docs/evidence/wp-200-wp-301-fleet-execution-status-2026-08-22-v3.json`; FAST, MEDIUM and LIFEBOAT are ready, Heavy is unavailable by timeout, and current selection is MEDIUM for preferred HEAVY.
 - `BACKUP_RESTORE_EVIDENCE = docs/evidence/wp-002-postgres-restore-2026-08-22-v1.json`; latest backup checksum and isolated restore verified with 11 schemas and 60 tables.
 - `UI_AUTHENTICATED_ACCEPTANCE = PENDING`; public login UI is reachable, but no authenticated browser session was available for cabinet visual acceptance.
 - `SECURITY_NOTE = one production executor secret was rotated after an accidental diagnostic disclosure; values are not retained in repository evidence.`

docs/evidence/audit-completion-matrix-2026-08-22-v1.json

@@ -1,14 +1,14 @@
 {
   "evidence_id": "audit-completion-matrix-2026-08-22-v1",
   "captured_at": "2026-08-22",
-  "production_revision": "51427a246e1ccc115a6c2640790d9220beca95e9",
+  "production_revision": "64642f4baed28f9051efe6a269769c5838b547e4",
   "objective": "Dovести оставшиеся пункты аудита Domovoy до проверяемого состояния",
   "matrix": [
     {"area":"Agent Execution runtime and recovery","status":"PARTIAL_EXTERNAL_GAP","repository_proof":["dev/tasks/DEV-000145-agent-execution-bridge-runtime.json","adapters/agentbridge/http.go","cmd/agent-worker/main.go"],"production_proof":["docs/evidence/wp-200-wp-301-fleet-execution-status-2026-08-22-v1.json"],"missing":"independently operated bridge endpoint is not configured; live worker is recovery-only"},
     {"area":"Multi-Agent Work Graph","status":"REPOSITORY_AND_RUNTIME_FOUNDATION_VERIFIED","repository_proof":["dev/tasks/DEV-000131-work-graph-harness.json","dev/tasks/DEV-000146-work-graph-runtime.json","tests/agent_execution/graph_runtime_test.go"],"production_proof":["docs/PROJECT_STATUS.md"],"missing":"no claim of external agent execution fan-out is made while bridge is absent"},
     {"area":"Truth/Research runtime","status":"REPOSITORY_AND_RUNTIME_FOUNDATION_VERIFIED","repository_proof":["dev/tasks/DEV-000134-truth-bundle-compiler.json","dev/tasks/DEV-000143-research-runtime-orchestration.json","tests/research_runtime"],"production_proof":["docs/PROJECT_STATUS.md"],"missing":"authenticated end-to-end research acceptance is not claimed here"},
     {"area":"Learning reflection loop","status":"REPOSITORY_AND_RUNTIME_FOUNDATION_VERIFIED","repository_proof":["dev/tasks/DEV-000135-reflection-worker.json","cmd/reflection-worker/main.go","tests/research_contracts/reflection_worker_sql_test.go"],"production_proof":["docs/PROJECT_STATUS.md"],"missing":"no claim of fully closed historical candidate backlog"},
-    {"area":"Model fleet/failover","status":"PARTIAL_EXTERNAL_GAP","repository_proof":["dev/tasks/DEV-000144-fleet-readiness-runtime.json","dev/tasks/DEV-000168-configurable-medium-fleet-slot.json","dev/tasks/DEV-000169-optional-medium-readiness.json","cmd/cognitive-worker/fleet_status.go"],"production_proof":["docs/evidence/wp-200-wp-301-fleet-execution-status-2026-08-22-v2.json"],"missing":"Medium runtime is not configured; Heavy GPU probe times out; FAST and Lifeboat are ready and Lifeboat is selected fallback"},
+    {"area":"Model fleet/failover","status":"PARTIAL_EXTERNAL_GAP","repository_proof":["dev/tasks/DEV-000144-fleet-readiness-runtime.json","dev/tasks/DEV-000168-configurable-medium-fleet-slot.json","dev/tasks/DEV-000169-optional-medium-readiness.json","dev/tasks/DEV-000171-connect-existing-medium-runtime.json","dev/tasks/DEV-000172-fleet-failover-priority.json","cmd/cognitive-worker/fleet_status.go","modules/capability/domain/fleet.go"],"production_proof":["docs/evidence/wp-200-wp-301-fleet-execution-status-2026-08-22-v3.json"],"missing":"Heavy GPU runtime remains unavailable by timeout; Medium availability is proven but model qualification/activation and multi-provider invocation evidence remain separate"},
     {"area":"Governed self-development","status":"REPOSITORY_FOUNDATION_VERIFIED","repository_proof":["dev/tasks/DEV-000137-governed-self-development-gate.json","tests/semantic_evolution"],"production_proof":["docs/PROJECT_STATUS.md"],"missing":"real bridge-backed self-development execution is not claimed"},
     {"area":"UI/operations acceptance","status":"PARTIAL_EXTERNAL_GAP","repository_proof":["dev/tasks/DEV-000138-ui-operations-acceptance-contract.json","tests/creator_web/cabinet_acceptance_contract_test.go","dev/tasks/DEV-000150-agent-operations-ui.json","dev/tasks/DEV-000151-agent-worker-status-ui.json"],"production_proof":["docs/PROJECT_STATUS.md"],"missing":"authenticated browser visual acceptance is pending because no signed-in session is available"}
   ],

docs/evidence/wp-200-wp-301-fleet-execution-status-2026-08-22-v3.json

@@ -0,0 +1,26 @@
+{
+  "evidence_id": "wp-200-wp-301-fleet-execution-status-2026-08-22-v3",
+  "captured_at": "2026-08-22",
+  "production_revision": "64642f4baed28f9051efe6a269769c5838b547e4",
+  "source": "live internal status probes on docker.cin.su after DEV-000171 and DEV-000172 deployment",
+  "fleet_readiness": {
+    "preferred_tier": "HEAVY",
+    "selected_tier": "MEDIUM",
+    "ready_tiers": ["FAST", "MEDIUM", "LIFEBOAT"],
+    "members": [
+      {"provider_instance_id": "local-cpu-primary", "tier": "FAST", "ready": true, "reason": "AVAILABLE"},
+      {"provider_instance_id": "local-medium-primary", "tier": "MEDIUM", "ready": true, "reason": "AVAILABLE", "provider_model_observed": "Qwen3.6-27B-UD-Q4_K_XL", "runtime": "llama.cpp CPU"},
+      {"provider_instance_id": "local-gpu-opportunistic", "tier": "HEAVY", "ready": false, "reason": "context deadline exceeded while awaiting headers"},
+      {"provider_instance_id": "cognitive-lifeboat", "tier": "LIFEBOAT", "ready": true, "reason": "AVAILABLE"}
+    ]
+  },
+  "runtime_readiness": {"status": "ready", "cpu": "READY/AVAILABLE", "medium": "READY/AVAILABLE", "lifeboat": "READY/AVAILABLE", "gpu": "DEGRADED/DEPENDENCY_UNAVAILABLE"},
+  "failover_policy": "HEAVY -> MEDIUM -> FAST -> LIFEBOAT",
+  "agent_execution": {"runtime": "agent-worker", "executor_configured": false, "mode": "recovery-only", "ready": false, "reason": "AGENT_EXECUTION_BRIDGE_URL is not configured"},
+  "interpretation": [
+    "The existing Qwen3.6-27B runtime is available as MEDIUM through an explicit external network attachment.",
+    "When preferred HEAVY is unavailable, fleet selection now chooses MEDIUM before FAST or Lifeboat.",
+    "Availability evidence does not claim model qualification, binding activation or authenticated browser acceptance.",
+    "This artifact contains no secret values."
+  ]
+}

modules/capability/domain/fleet.go

@@ -37,8 +37,13 @@ func SelectFleetTier(readiness capability.FleetReadiness, preferred capability.F
 	if readiness.ObservedAtUnixMillis < 1 || len(readiness.Members) == 0 || !validFleetTier(readiness.FallbackTier) {
 		return "", ErrInvalidFleetReadiness
 	}
-	if slices.Contains(readiness.ReadyTiers, preferred) {
-		return preferred, nil
+	if !validFleetTier(preferred) {
+		return "", ErrInvalidFleetReadiness
+	}
+	for _, tier := range fleetFailoverOrder(preferred) {
+		if slices.Contains(readiness.ReadyTiers, tier) {
+			return tier, nil
+		}
 	}
 	if slices.Contains(readiness.ReadyTiers, readiness.FallbackTier) {
 		return readiness.FallbackTier, nil
@@ -46,6 +51,21 @@ func SelectFleetTier(readiness capability.FleetReadiness, preferred capability.F
 	return "", ErrInvalidFleetReadiness
 }
 
+func fleetFailoverOrder(preferred capability.FleetTier) []capability.FleetTier {
+	switch preferred {
+	case capability.FleetTierHeavy:
+		return []capability.FleetTier{capability.FleetTierHeavy, capability.FleetTierMedium, capability.FleetTierFast}
+	case capability.FleetTierMedium:
+		return []capability.FleetTier{capability.FleetTierMedium, capability.FleetTierFast}
+	case capability.FleetTierFast:
+		return []capability.FleetTier{capability.FleetTierFast}
+	case capability.FleetTierLifeboat:
+		return []capability.FleetTier{capability.FleetTierLifeboat}
+	default:
+		return nil
+	}
+}
+
 func validFleetTier(value capability.FleetTier) bool {
 	return value == capability.FleetTierFast || value == capability.FleetTierMedium || value == capability.FleetTierHeavy || value == capability.FleetTierLifeboat
 }

modules/capability/domain/fleet_test.go

@@ -16,3 +16,33 @@ func TestFleetReadinessFallsBackToLifeboatWhenPrimaryTiersUnavailable(t *testing
 		t.Fatalf("selected=%q err=%v", selected, err)
 	}
 }
+
+func TestFleetReadinessFallsBackFromHeavyToMediumBeforeLifeboat(t *testing.T) {
+	readiness, err := BuildFleetReadiness(100, []capability.FleetMember{
+		{ProviderInstanceID: "medium", ModelDescriptorID: "qwen-medium", Tier: capability.FleetTierMedium, Ready: true, Reason: "available"},
+		{ProviderInstanceID: "heavy", ModelDescriptorID: "gpu", Tier: capability.FleetTierHeavy, Ready: false, Reason: "timeout"},
+		{ProviderInstanceID: "lifeboat", ModelDescriptorID: "qwen-lifeboat", Tier: capability.FleetTierLifeboat, Ready: true, Reason: "available"},
+	})
+	if err != nil {
+		t.Fatal(err)
+	}
+	selected, err := SelectFleetTier(readiness, capability.FleetTierHeavy)
+	if err != nil || selected != capability.FleetTierMedium {
+		t.Fatalf("selected=%q err=%v", selected, err)
+	}
+}
+
+func TestFleetReadinessFallsBackFromHeavyToFastBeforeLifeboat(t *testing.T) {
+	readiness, err := BuildFleetReadiness(100, []capability.FleetMember{
+		{ProviderInstanceID: "fast", ModelDescriptorID: "qwen-fast", Tier: capability.FleetTierFast, Ready: true, Reason: "available"},
+		{ProviderInstanceID: "heavy", ModelDescriptorID: "gpu", Tier: capability.FleetTierHeavy, Ready: false, Reason: "timeout"},
+		{ProviderInstanceID: "lifeboat", ModelDescriptorID: "qwen-lifeboat", Tier: capability.FleetTierLifeboat, Ready: true, Reason: "available"},
+	})
+	if err != nil {
+		t.Fatal(err)
+	}
+	selected, err := SelectFleetTier(readiness, capability.FleetTierHeavy)
+	if err != nil || selected != capability.FleetTierFast {
+		t.Fatalf("selected=%q err=%v", selected, err)
+	}
+}