fix(archera): validate required comparison amounts

go.mod

@@ -74,7 +74,7 @@ require (
 )
 
 require (
-	github.com/LeanerCloud/cloud-commitments-go/pkg v0.0.0-20261012130811-9dae64b216d4
+	github.com/LeanerCloud/cloud-commitments-go/pkg v0.0.0-20261016175124-570d168c6bc7
 	github.com/LeanerCloud/cloud-commitments-go/providers/aws v0.0.0-20261012130811-9dae64b216d4
 	github.com/LeanerCloud/cloud-commitments-go/providers/azure v0.0.0-20261012130811-9dae64b216d4
 	github.com/LeanerCloud/cloud-commitments-go/providers/gcp v0.0.0-20261012130811-9dae64b216d4

go.sum

@@ -76,8 +76,8 @@ github.com/GoogleCloudPlatform/opentelemetry-operations-go/internal/cloudmock v0
 github.com/GoogleCloudPlatform/opentelemetry-operations-go/internal/cloudmock v0.55.0/go.mod h1:vB2GH9GAYYJTO3mEn8oYwzEdhlayZIdQz6zdzgUIRvA=
 github.com/GoogleCloudPlatform/opentelemetry-operations-go/internal/resourcemapping v0.55.0 h1:0s6TxfCu2KHkkZPnBfsQ2y5qia0jl3MMrmBhu3nCOYk=
 github.com/GoogleCloudPlatform/opentelemetry-operations-go/internal/resourcemapping v0.55.0/go.mod h1:Mf6O40IAyB9zR/1J8nGDDPirZQQPbYJni8Yisy7NTMc=
-github.com/LeanerCloud/cloud-commitments-go/pkg v0.0.0-20261012130811-9dae64b216d4 h1:4C/4ZLemkgC45z47LtCjICglnfcTBzP2KUAq/gZEzZQ=
-github.com/LeanerCloud/cloud-commitments-go/pkg v0.0.0-20261012130811-9dae64b216d4/go.mod h1:8RTmzPazA8IeVZfn7wNaU7ILx0VK5eHZQozO21Mvtq8=
+github.com/LeanerCloud/cloud-commitments-go/pkg v0.0.0-20261016175124-570d168c6bc7 h1:mAvqQSMkTuw4P8m8o+/wdyoxGE9L6eiEzZFanGXqYcI=
+github.com/LeanerCloud/cloud-commitments-go/pkg v0.0.0-20261016175124-570d168c6bc7/go.mod h1:SCDEgHG6evjPh0RsoXof+J3aMmGXNFMrwbJIle7rMpQ=
 github.com/LeanerCloud/cloud-commitments-go/providers/aws v0.0.0-20261012130811-9dae64b216d4 h1:fnEv+2eCL0ObXn1nAFlBa2kZy1A0/nhc7LxYeDFCCkQ=
 github.com/LeanerCloud/cloud-commitments-go/providers/aws v0.0.0-20261012130811-9dae64b216d4/go.mod h1:C0ildZeRds0aRvDZp49MLY0kFWh/4FiM4lPWWWd3HFA=
 github.com/LeanerCloud/cloud-commitments-go/providers/azure v0.0.0-20261012130811-9dae64b216d4 h1:HljKKZOmfam4C3T5109DMeUQuyxVHRohroA4j/OU5oY=

tools/archera_pkg_adoption_test.go

@@ -0,0 +1,62 @@
+package tools
+
+import (
+	"encoding/json"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+func TestArcheraComparisonSelectedAmountContract(t *testing.T) {
+	setArcheraEnv(t)
+	cases := []struct {
+		value   any
+		name    string
+		missing bool
+		invalid bool
+	}{
+		{name: "missing", missing: true, invalid: true},
+		{name: "null", invalid: true},
+		{name: "negative", value: json.Number("-0.01"), invalid: true},
+		{name: "zero", value: json.Number("0")},
+		{name: "positive", value: json.Number("2")},
+	}
+	for _, location := range []struct {
+		name      string
+		candidate int
+	}{{name: "current", candidate: -1}, {name: "first candidate", candidate: 0}, {name: "second candidate", candidate: 1}} {
+		for _, tc := range cases {
+			t.Run(location.name+"/"+tc.name, func(t *testing.T) {
+				var wire map[string]any
+				require.NoError(t, json.Unmarshal(readWire(t), &wire))
+				entry := entryOf(wire)
+				if location.candidate >= 0 {
+					row := wire["data"].([]any)[0].(map[string]any)
+					entry = row["candidates"].([]any)[location.candidate].(map[string]any)
+				}
+				if tc.missing {
+					delete(entry, "selected_amount")
+				} else {
+					entry["selected_amount"] = tc.value
+				}
+				body, err := json.Marshal(wire)
+				require.NoError(t, err)
+				transport := okTransport(body)
+				result, protocol, err := callArchera(t, transport, nil)
+				require.NoError(t, err)
+				require.NotNil(t, result)
+				assert.Equal(t, 1, transport.count())
+				assert.NotContains(t, protocol, testArcheraKey)
+				if tc.invalid {
+					require.True(t, result.IsError, "invalid selected_amount must be refused")
+					assert.Contains(t, resultText(result), "selected_amount")
+					assert.Empty(t, result.StructuredContent)
+				} else {
+					got := structured(t, result)
+					assert.Len(t, got["rows"], 1)
+				}
+			})
+		}
+	}
+}

tools/testdata/archera_comparison_wire.json

@@ -80,6 +80,7 @@
    "current": {
     "is_current": true,
     "offer_id": "offer-cur",
+    "selected_amount": 2,
     "offer": {
      "provider": "aws",
      "region": "eu-west-1",
@@ -118,6 +119,7 @@
    "candidates": [
     {
      "is_current": false,
+     "selected_amount": 2,
      "offer_id": "\u001b[31m\u009b\u0085\u200b\u2028HOSTILE_OFFERID_xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx",
      "offer": {
       "provider": "gcp",
@@ -157,6 +159,7 @@
     {
      "is_current": false,
      "offer_id": "offer-c2",
+     "selected_amount": 0.125,
      "offer": {
       "provider": "aws",
       "region": null,