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v1.39.0

punkpeye/fastmcpv1.39.0Mar 6, 2026by Schniz

AI Summary

Significantly improves shell startup performance and adds new flags for automatic version switching and checking the current default version.

Key Highlights

  • Shell startup is now faster
  • Improved `--use-on-cd` shell hook robustness
  • New `fnm install --use` flag
  • New `fnm default` command

New Features

  • Shell startup optimization
  • Automatic version switching flag
  • Default version retrieval

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: