Method forkSession

pkg/server/server.go:248–275

forkSession creates a new session whose history is a deep copy of an existing session up to (but excluding) the Nth user message. The new session uses a fork-numbered title and starts with no runtime attached.

(c echo.Context)

// new session uses a fork-numbered title and starts with no runtime
// attached.
func (s *Server) forkSession(c echo.Context) error {
	var req api.ForkSessionRequest
	if err := c.Bind(&req); err != nil {
		return echo.NewHTTPError(http.StatusBadRequest, fmt.Sprintf("invalid request body: %v", err))
	}

	forked, err := s.sm.ForkSession(c.Request().Context(), c.Param("id"), req.UserMessageIndex)
	if err != nil {
		switch {
		case errors.Is(err, ErrForkOutOfRange),
			errors.Is(err, ErrForkInSubSession):
			return echo.NewHTTPError(http.StatusBadRequest, err.Error())
		}
		return echo.NewHTTPError(http.StatusInternalServerError, fmt.Sprintf("failed to fork session: %v", err))
	}

	return c.JSON(http.StatusOK, api.SessionResponse{
		ID:            forked.ID,
		Title:         forked.Title,
		CreatedAt:     forked.CreatedAt,
		Messages:      forked.GetAllMessages(),
		ToolsApproved: forked.ToolsApproved,
		InputTokens:   forked.InputTokens,
		OutputTokens:  forked.OutputTokens,
		WorkingDir:    forked.WorkingDir,
		Permissions:   forked.Permissions,
	})
}

func (s *Server) getSession(c echo.Context) error {
	sess, err := s.sm.GetSession(c.Request().Context(), c.Param("id"))