Add named pipeline profile composition

internal/config/load.go

@@ -14,7 +14,20 @@ import (
 
 // LoadPipeline loads pipeline configuration from a YAML file with strict field checking.
 func LoadPipeline(path string) (*PipelineConfig, error) {
-	cfg, err := loadComposedPipeline(path)
+	return LoadPipelineWithOptions(path, PipelineLoadOptions{})
+}
+
+// PipelineLoadOptions carries an optional explicit profile selection. A nil
+// Profile means the caller omitted selection; a non-nil empty value is an
+// explicit invalid selection.
+type PipelineLoadOptions struct {
+	Profile *string
+}
+
+// LoadPipelineWithOptions loads pipeline configuration with strict field
+// checking and optional named-profile selection.
+func LoadPipelineWithOptions(path string, opts PipelineLoadOptions) (*PipelineConfig, error) {
+	cfg, err := loadComposedPipeline(path, opts)
 	if err != nil {
 		return nil, fmt.Errorf("load pipeline config: %w", err)
 	}
@@ -22,6 +35,9 @@ func LoadPipeline(path string) (*PipelineConfig, error) {
 	if err := resolveNotariusPaths(cfg, path); err != nil {
 		return nil, fmt.Errorf("load pipeline config: %w", err)
 	}
+	if err := finalizePipelineResolution(cfg); err != nil {
+		return nil, fmt.Errorf("load pipeline config: %w", err)
+	}
 	return cfg, nil
 }
 
@@ -43,6 +59,7 @@ func LoadSession(path string) (*SessionConfig, error) {
 type SessionLoadOptions struct {
 	SessionID         string
 	PreviousSessionID string
+	Profile           *string
 }
 
 // LoadSessionWithOptions loads session configuration from a YAML file with
@@ -141,7 +158,7 @@ func Load(pipelinePath string, paths ...string) (*Config, error) {
 // LoadWithSessionOptions loads and resolves combined pipeline, campaign, and
 // session configuration with expected session identity checks.
 func LoadWithSessionOptions(pipelinePath, campaignPath, sessionPath string, sessionOpts SessionLoadOptions) (*Config, error) {
-	pipelineCfg, err := LoadPipeline(pipelinePath)
+	pipelineCfg, err := LoadPipelineWithOptions(pipelinePath, PipelineLoadOptions{Profile: sessionOpts.Profile})
 	if err != nil {
 		return nil, err
 	}