[rc.1] dogfooding sign-up — try refract 0.1.0-rc.1 on your Rails app

[hrtsx]

We just cut 0.1.0-rc.1 — the single release candidate of refract, a
zero-dependency Ruby LSP/MCP/DAP server written in Zig. Targeting 0.1.0
final after a week of stable RC signal and a handful of real-world
sessions on production Rails apps.

What I need from you

A short hour-of-use session on your daily Rails project, then a single
issue or comment with:

• Setup: editor + version, Ruby version, repo size (rough LOC)
• First-impression: what worked, what felt off
• One concrete bug or DX gap: if any

Time budget: 1 h of editing. No structured script needed.

Install (rc.1)

Linux x86_64:

curl -fsSL https://github.com/hrtsx/refract/releases/download/v0.1.0-rc1/refract-x86_64-linux \
  -o ~/.local/bin/refract && chmod +x ~/.local/bin/refract
refract --version  # → refract 0.1.0-rc.1

aarch64-linux, x86_64-macos, aarch64-macos: same pattern.

VSCode/OpenVSX extension and Homebrew formula are deferred to the 0.1.0
final tag — for rc.1 please use the editor configs in
editors/.

Known caveats

• Plugin sandbox: enforced on every spawn (Linux seccomp + Landlock +
  setrlimit; macOS sandbox_init). Manifest is fail-closed on
  allow_network: true / non-empty allow_fs_write in 0.1.x.
• Splat / double-splat type propagation: not in 0.1.0; deferred to 0.2.
• 24 h soak: GH-hosted runner cap is 6 h; weekly Sunday cron runs 5 h
  on full Discourse + Mastodon corpus. True 24 h soak path needs
  self-hosted infra and lands in 0.1.1.
• Windows: not supported in 0.1.x.

Where to file feedback

• One-off bug or perf issue → Issues with rc1-dogfooding label
• Comparative observations vs ruby-lsp / Sorbet → comment on this discussion
• Editor wiring questions → Discussion → Q&A

What's in rc.1

See CHANGELOG.md:

• LSP outgoingCalls UAF on musl fixed
• Query handlers no longer drive synchronous index flushes
• Pre-rendered method/completion bodies
• MCP path-traversal guard + regression test
• Soak corpus widened to full Discourse + Mastodon; weekly 5 h cron
• perf-nightly Zig download switched off the flaky mirror routing
• CHANGELOG sandbox claim corrected (sandbox is shipped, not deferred)

Thanks for trying it. Every report shapes 0.1.0 final.