v0.2.4-beta

Added

• Quick-install scripts. install.sh (POSIX bash) and install.ps1 (Windows PowerShell) at the repo root download the latest prima release binary for the detected OS/architecture (mapping to the release matrix targets), verify the SHA-256 checksum, and install to ~/.local/bin (override with PRIMA_INSTALL_DIR; PRIMA_TARGET/PRIMA_VERSION override detection). The README now shows the one-line install commands.
• CI workflow (.github/workflows/ci.yml). Runs cargo fmt --all --check and cargo clippy --workspace --all-targets -- -D warnings on ubuntu and cargo test --workspace on ubuntu + windows, for every push to main/dev and every pull request.
• tests/cli.rs: run_all_examples_succeed now also runs the previously unasserted examples autodiff, builtin_layers, capi, config_simplify, fstring, jit, mymath, opt_levels.

Changed

• Release workflow macOS matrix. x86_64-apple-darwin was pinned to macos-13, a GitHub-hosted runner retired in Dec 2025 — a retired runs-on label leaves the job queued forever instead of failing. Both macOS targets now run on macos-15 (arm64): x86_64-apple-darwin is cross-compiled on Apple Silicon via rustup target add + cargo build --target (the Xcode SDK is universal), and aarch64-apple-darwin builds natively. The build job gained a timeout-minutes safety net and verifies the x86_64 macOS artifact's architecture with file.
• Comment/consistency housekeeping. Removed stray Chinese text from code comments (src/diagnostics.rs, examples/jit.pra), fixed a duplicated phrase in examples/linear_algebra.pra, dropped stale "prima-jit is a stub" wording in benches/bench_jit.rs (the crate is fully implemented), and reworded "deferred to a later phase/stage" doc comments to "later release". docs/IMPLEMENTATION-*.md §5 roadmap heading updated to reflect Phases 0–12 scope.
• Workspace reformatted with cargo fmt (rustfmt 1.9). The whole workspace is now canonical rustfmt output (cargo fmt --all --check passes), so formatting is enforced in CI like clippy and the tests.
• README (English + Chinese) rewritten with badges, an install section, and updated document version references (v2.1 → v2.3); the broken cargo run -- release run quick-start command was corrected.