Set up Cursor Cloud development environment

[cowboycodr]

Summary

Sets up the development environment for the glass Rust terminal Markdown editor so future Cloud Agents can build, lint, test, and run it.

What was needed

• Rust stable ≥ 1.85 for edition 2024 (image shipped 1.83; updated default to stable 1.96).
• GCC as the default cc/c++ — tree-sitter-markdown compiles C++ via cc-rs, and the image's default clang (invoked with --target=x86_64-unknown-linux-gnu) fails to find libstdc++ headers ('cassert' file not found). Switched alternatives to GCC.
• Ghostty terminal installed for interactive/manual TUI testing (per request).

Changes

• Add AGENTS.md with ## Cursor Cloud specific instructions documenting the toolchain/compiler caveats, standard lint/test/build/run commands, and the Ghostty manual-testing note.
• Configure the startup update script (rustup default stable, cargo fetch --locked).

Verification

• cargo build --release --locked — success
• cargo fmt --all -- --check — clean
• cargo test --locked — 136 passed
• ./target/release/glass --render — renders ANSI snapshot
• Interactive edit + save of a note verified inside Ghostty.

glass_in_ghostty_demo.mp4
glass editor open in Ghostty
edits persisted, shown via cat in Ghostty

_{To show artifacts inline, enable in settings.}

  

[cowboycodr]

Closing as part of repository cleanup before public launch.