v1.39.0

fatedier/frpv1.39.0Mar 6, 2026by Schniz

AI Summary

This release focuses on performance and user experience improvements, including faster shell startup and enhanced robustness for the `--use-on-cd` hook. It introduces new CLI flags for automatic version switching and improved default version retrieval.

Key Highlights

Shell startup is significantly faster by eliminating an extra subprocess during initialization.
Improved robustness of the `--use-on-cd` shell hook, including zsh deduplication and Windows CMD fixes.
New `fnm install --use` flag to automatically switch to the installed version.
The `fnm default` command now supports returning the current default version without arguments.

New Features

Added `fnm install --use` flag for automatic version switching after installation.
Enhanced `fnm default` command to return the current default version when run without arguments.

Full Release Notes

**Performance & UX Improvements:**
- Shell startup is now faster: `fnm env --use-on-cd` applies the initial version during `fnm env` itself, eliminating an extra `fnm use` subprocess
- Improved `--use-on-cd` shell hook robustness (zsh hook deduplication on re-source, Windows CMD fixes for paths with spaces and drive changes)

**New Features:**
- `fnm install --use` flag to automatically switch to the version after installing
- `fnm default` (with no arguments) now returns the current default version

**Internal:**
- Rust toolchain upgraded to 1.88

**Docs/Maintenance:**
- Various README improvements, typo fixes, and CI workflow fixes

**Thanks to the new contributors:** @SunsetTechuila, @MangelMaxime, @CodingWithAnxiety, @zeroberry, @isaacl :hat-tip: