Feat v0.9.5 typed forms sdk (#79)

Co-authored-by: Jeffrey Smith <jasafpro@gmail.com>
Co-committed-by: Jeffrey Smith <jasafpro@gmail.com>

server/handlers/package_validate.go

@@ -5,6 +5,8 @@ import (
 	"fmt"
 	"regexp"
 	"strings"
+
+	"armature/forms"
 )
 
 // validManifestID matches lowercase alphanumeric slugs with optional hyphens.
@@ -35,6 +37,7 @@ type ManifestInfo struct {
 	GatePermission  string   // if set, checks this user permission before calling on_request
 	RequiresRoles   []string // team roles needed to access this package (advisory, OR semantics)
 	Adoptable       bool     // if true, teams can adopt this package to get a team-scoped copy
+	HasFormTemplate bool     // if true, package declares a form_template at the top level
 }
 
 // ValidateManifest parses a manifest map and validates all required fields,
@@ -184,6 +187,18 @@ func ValidateManifest(manifest map[string]any) (*ManifestInfo, error) {
 		info.Adoptable = v
 	}
 
+	// v0.9.5: form_template — any package can declare a typed form template
+	if manifest["form_template"] != nil {
+		raw, err := json.Marshal(manifest["form_template"])
+		if err != nil {
+			return nil, fmt.Errorf("form_template is invalid JSON")
+		}
+		if tpl := forms.ParseTypedFormTemplate(raw); tpl == nil {
+			return nil, fmt.Errorf("form_template is invalid or empty")
+		}
+		info.HasFormTemplate = true
+	}
+
 	info.SchemaVersion = ParseSchemaVersion(manifest)
 
 	// ── Type-specific constraints ────────────────────────────────