feat: add workspace-isolated toolhost runtime and capability-gap skill loop

internal/runtimews/bootstrap.go

@@ -0,0 +1,109 @@
+package runtimews
+
+import (
+	"fmt"
+	"io"
+	"os"
+	"path/filepath"
+	"strings"
+)
+
+const envWorkspaceDir = "AGENT_WORKSPACE_DIR"
+
+func PrepareFromEnv() (string, error) {
+	workspaceDir := strings.TrimSpace(os.Getenv(envWorkspaceDir))
+	if workspaceDir == "" {
+		workspaceDir = filepath.Join(".", "workspace", "agent_runtime")
+	}
+	absWorkspace, err := filepath.Abs(workspaceDir)
+	if err != nil {
+		return "", err
+	}
+	if err := os.MkdirAll(absWorkspace, 0o755); err != nil {
+		return "", err
+	}
+
+	if err := seedRuntimeWorkspace(absWorkspace); err != nil {
+		return "", err
+	}
+
+	if err := os.Setenv(envWorkspaceDir, absWorkspace); err != nil {
+		return "", err
+	}
+	_ = os.Setenv("CONFIG_ENV_FILE", filepath.Join(absWorkspace, "configs", "env"))
+	return absWorkspace, nil
+}
+
+func seedRuntimeWorkspace(workspaceRoot string) error {
+	seedDirs := []string{"configs", "data", "bot_context", "skills"}
+	for _, name := range seedDirs {
+		src := filepath.Join(".", name)
+		dst := filepath.Join(workspaceRoot, name)
+		if err := copyDirIfMissing(src, dst); err != nil {
+			return fmt.Errorf("seed %s failed: %w", name, err)
+		}
+	}
+	if err := os.MkdirAll(filepath.Join(workspaceRoot, "workspace"), 0o755); err != nil {
+		return err
+	}
+	return nil
+}
+
+func copyDirIfMissing(src, dst string) error {
+	info, err := os.Stat(src)
+	if err != nil {
+		if os.IsNotExist(err) {
+			return nil
+		}
+		return err
+	}
+	if !info.IsDir() {
+		return nil
+	}
+	if err := os.MkdirAll(dst, 0o755); err != nil {
+		return err
+	}
+
+	return filepath.WalkDir(src, func(path string, d os.DirEntry, walkErr error) error {
+		if walkErr != nil {
+			return walkErr
+		}
+		rel, err := filepath.Rel(src, path)
+		if err != nil {
+			return err
+		}
+		target := filepath.Join(dst, rel)
+		if d.IsDir() {
+			return os.MkdirAll(target, 0o755)
+		}
+		if _, err := os.Stat(target); err == nil {
+			return nil
+		}
+		if err := copyFile(path, target); err != nil {
+			return err
+		}
+		return nil
+	})
+}
+
+func copyFile(src, dst string) error {
+	in, err := os.Open(src)
+	if err != nil {
+		return err
+	}
+	defer in.Close()
+
+	if err := os.MkdirAll(filepath.Dir(dst), 0o755); err != nil {
+		return err
+	}
+	out, err := os.Create(dst)
+	if err != nil {
+		return err
+	}
+	defer out.Close()
+
+	if _, err := io.Copy(out, in); err != nil {
+		return err
+	}
+	return out.Sync()
+}