Harden initial framework skeleton

internal/config/load.go

@@ -4,6 +4,7 @@ import (
 	"fmt"
 	"io"
 	"os"
+	"path/filepath"
 
 	"gopkg.in/yaml.v3"
 )
@@ -11,7 +12,7 @@ import (
 // LoadPipeline loads pipeline configuration from a YAML file with strict field checking.
 func LoadPipeline(path string) (*PipelineConfig, error) {
 	var cfg PipelineConfig
-	if err := decodeStrictYAML(path, &cfg); err != nil {
+	if err := decodeStrictYAML("pipeline", path, &cfg); err != nil {
 		return nil, fmt.Errorf("load pipeline config: %w", err)
 	}
 	return &cfg, nil
@@ -20,7 +21,7 @@ func LoadPipeline(path string) (*PipelineConfig, error) {
 // LoadSession loads session configuration from a YAML file with strict field checking.
 func LoadSession(path string) (*SessionConfig, error) {
 	var cfg SessionConfig
-	if err := decodeStrictYAML(path, &cfg); err != nil {
+	if err := decodeStrictYAML("session", path, &cfg); err != nil {
 		return nil, fmt.Errorf("load session config: %w", err)
 	}
 	return &cfg, nil
@@ -46,23 +47,31 @@ func Load(pipelinePath, sessionPath string) (*Config, error) {
 	}, nil
 }
 
-func decodeStrictYAML(path string, out any) error {
+func decodeStrictYAML(kind, path string, out any) error {
 	f, err := os.Open(path)
 	if err != nil {
-		return fmt.Errorf("open %q: %w", path, err)
+		return fmt.Errorf("%s file %q: open: %w", kind, path, err)
 	}
 	defer f.Close()
 
 	dec := yaml.NewDecoder(f)
 	dec.KnownFields(true)
 	if err := dec.Decode(out); err != nil {
-		return fmt.Errorf("decode %q: %w", path, err)
+		return fmt.Errorf("%s file %q: strict decode failed: %w", kind, path, err)
 	}
 
 	var extra any
 	if err := dec.Decode(&extra); err != nil && err != io.EOF {
-		return fmt.Errorf("decode trailing content in %q: %w", path, err)
+		return fmt.Errorf("%s file %q: trailing content decode failed: %w", kind, path, err)
 	}
 
 	return nil
 }
+
+func shortName(path, fallback string) string {
+	base := filepath.Base(path)
+	if base == "." || base == string(filepath.Separator) {
+		return fallback
+	}
+	return base
+}