Add D&D spells extractor skeleton

internal/modules/extract/dnd/spells/extractor.go

@@ -0,0 +1,65 @@
+package spells
+
+import (
+	"context"
+	"fmt"
+
+	"gitea.maximumdirect.net/eric/notarius/internal/framework/contracts"
+	"gitea.maximumdirect.net/eric/notarius/internal/framework/pipeline"
+)
+
+const Key = "dnd/spells"
+const ArtifactType = "dnd.spell_cast"
+const SchemaVersion = "v1"
+
+var requiredCapabilities = []string{
+	"chunks",
+	"source.transcript",
+}
+
+var providedCapabilities = []string{
+	"dnd.spell_casts",
+}
+
+var _ contracts.Extractor = (*Extractor)(nil)
+
+type Extractor struct{}
+
+func New() *Extractor {
+	return &Extractor{}
+}
+
+func (e *Extractor) Key() string {
+	return Key
+}
+
+func (e *Extractor) ArtifactType() string {
+	return ArtifactType
+}
+
+func (e *Extractor) SchemaVersion() string {
+	return SchemaVersion
+}
+
+func (e *Extractor) Validators() []contracts.Validator {
+	return nil
+}
+
+func (e *Extractor) Extract(ctx context.Context, req contracts.ExtractionRequest) (contracts.ExtractionResult, error) {
+	return contracts.ExtractionResult{}, fmt.Errorf("dnd spells extractor: extraction is not implemented")
+}
+
+func ModuleSpec() pipeline.ModuleSpec {
+	return pipeline.ModuleSpec{
+		Key:      Key,
+		Stage:    pipeline.StageExtract,
+		Requires: append([]string(nil), requiredCapabilities...),
+		Provides: append([]string(nil), providedCapabilities...),
+	}
+}
+
+func Register(registry *pipeline.ExtractorRegistry) error {
+	return registry.RegisterWithSpec(ModuleSpec(), func() (contracts.Extractor, error) {
+		return New(), nil
+	})
+}