Add context packs impact analysis and message validation

toolkit/internal/gsp/model.go

@@ -131,14 +131,53 @@ type TraceResult struct {
 
 type PackResult struct {
 	Entry       string  `json:"entry"`
+	Intent      string  `json:"intent,omitempty"`
+	Stage       string  `json:"stage,omitempty"`
 	Depth       int     `json:"depth"`
 	Budget      int     `json:"budget,omitempty"`
 	Truncated   bool    `json:"truncated"`
 	Units       []*Unit `json:"units"`
+	Summary     Summary `json:"summary"`
 	ApproxChars int     `json:"approxChars"`
 	Warnings    []Issue `json:"warnings,omitempty"`
 }
 
+type Summary struct {
+	UnitCount     int            `json:"unitCount"`
+	MinResolution string         `json:"minResolution,omitempty"`
+	MaxResolution string         `json:"maxResolution,omitempty"`
+	TypeCounts    map[string]int `json:"typeCounts,omitempty"`
+	MissingCount  int            `json:"missingCount,omitempty"`
+}
+
+type ImpactResult struct {
+	Entry    string        `json:"entry"`
+	Depth    int           `json:"depth"`
+	Summary  ImpactSummary `json:"summary"`
+	Direct   []ImpactEntry `json:"direct,omitempty"`
+	Indirect []ImpactEntry `json:"indirect,omitempty"`
+	Edges    []GraphEdge   `json:"edges,omitempty"`
+	Warnings []Issue       `json:"warnings,omitempty"`
+}
+
+type ImpactSummary struct {
+	DirectCount   int `json:"directCount"`
+	IndirectCount int `json:"indirectCount"`
+	TotalCount    int `json:"totalCount"`
+	MaxDepth      int `json:"maxDepth"`
+}
+
+type ImpactEntry struct {
+	ID         string `json:"id"`
+	Title      string `json:"title,omitempty"`
+	Type       string `json:"type,omitempty"`
+	Resolution string `json:"resolution,omitempty"`
+	File       string `json:"file,omitempty"`
+	Depth      int    `json:"depth"`
+	Via        string `json:"via,omitempty"`
+	Kind       string `json:"kind,omitempty"`
+}
+
 type Graph struct {
 	Nodes []GraphNode `json:"nodes"`
 	Edges []GraphEdge `json:"edges"`