Yuki v0.1.0 - Reproducible Agent Sessions

Changelog

All notable changes to Yuki will be documented in this file.

[0.1.0] - 2026-05-06

Added

• Reproducible session features - All features from the paper are now implemented:

  • tools.denied - Filter out tools from the allowed list
  • environment - Declare environment variables in module config
  • systemPrompt - Write system prompt to .yuki/CLAUDE.md
  • sandbox - Module option that maps to --permission-mode
  • mcp.servers - Generate MCP config in ~/.yuki/settings.json
  • lib.mkAfter composition for system prompt merging

• Profile composition - Multiple profiles merge deterministically:

  • default - Base tools + REPL
  • rust - Rust development with toolchain
  • review - Read-only, sandboxed code review

• CLI rebranding - All user-facing output now uses "yuki" instead of "claw":

  • --help shows yuki v0.1.0
  • --version shows "Yuki CLI"
  • Error messages reference yuki

• Development environment:

  • nix develop - Dev shell with Rust toolchain
  • shell.nix - Fallback for non-flake Nix

Changed

• mkHarness now passes permission mode based on sandbox settings
• System prompt is written to .yuki/CLAUDE.md at session start
• MCP servers are configured via ~/.yuki/settings.json
• Hardcoded paths removed from mkHarness.nix

Documentation

• Complete rewrite of README.md with team use cases
• Updated USAGE.md with yuki binary references
• New shell.nix for local development

Credits

• Built on ultraworkers/claw-code
• Inspired by NixVim