feat: perry dev — V1 watch mode (auto-recompile + relaunch on save)

CLAUDE.md

@@ -8,7 +8,7 @@ This file provides guidance to Claude Code (claude.ai/code) when working with co
 
 Perry is a native TypeScript compiler written in Rust that compiles TypeScript source code directly to native executables. It uses SWC for TypeScript parsing and LLVM for code generation.
 
-**Current Version:** 0.5.142
+**Current Version:** 0.5.143
 
 ## TypeScript Parity Status
 
@@ -149,6 +149,7 @@ First-resolved directory cached in `compile_package_dirs`; subsequent imports re
 
 Keep entries to 1-2 lines max. Full details in CHANGELOG.md.
 
+- **v0.5.143** — New `perry dev <entry.ts>` subcommand (V1 watch mode, PR #126 by @TheHypnoo). Watches the nearest project root (package.json/perry.toml, falls back to entry dir) recursively via the `notify` crate, debounces 300ms, recompiles on any `.ts|.tsx|.mts|.cts|.json|.toml` change, kills the running child, and relaunches the fresh binary. Ignores `node_modules`, `target`, `.git`, `dist`, `build`, `.perry-dev`. Output defaults to `.perry-dev/<stem>`. Args after `--` forward to the child (`perry dev src/main.ts -- --port 3000`). Smoke-tested: initial build ~15s (cold auto-optimize), post-edit rebuild ~330ms (hot libs cached). 8 unit tests cover the pure helpers (`is_trigger_path`, `is_relevant`, `find_project_root`); `tempfile` added as dev-dep. Docs added to `docs/src/cli/commands.md` on merge. V2 follow-ups planned: in-memory AST cache + per-module `.o` reuse for incremental compilation.
 - **v0.5.142** — Make `stdlib/fs/roundtrip.ts` cross-platform. v0.5.140 introduced the example with a hardcoded `/tmp/perry_fs_demo.txt` path, which has no equivalent on Windows; the Windows doc-tests run correctly wrote to `C:\Users\…\tmp\…` (or wherever write fell back to) but the subsequent `readFileSync(path, "utf-8")` returned empty because the file wasn't at `/tmp`, so `roundtrip ok: false`. Switched the example to `os.tmpdir() + path.join`, re-blessed the expected stdout (dropped the absolute path from the "wrote N bytes" line since it varies per OS). Also removes the same bug if the example is ever run on a Windows dev box.
 - **v0.5.142** — Fix async arrow / closure return values (closes #125). `compile_closure` (`crates/perry-codegen/src/codegen.rs:1657, 1818`) had been dropping the `is_async` flag from `Expr::Closure` — the FnCtx was always constructed with `is_async_fn: false`, so `Stmt::Return` inside an async arrow never wrapped its value in `js_promise_resolved`. Consumers that rely on the closure returning a real Promise pointer (Fastify's server runtime inspects handler results with `js_is_promise` → `js_promise_value`) got back a raw NaN-boxed object pointer, treated it as a Promise, and read the object's field memory as `Promise.value` — surfacing as a gibberish decimal (a raw heap address reinterpreted as f64) in the HTTP response body. Threaded `is_async` through the destructure, set `is_async_fn: is_async`, and wrapped the no-explicit-return fallback too. Also stripped ~10 stale debug `eprintln!`s from `crates/perry-stdlib/src/fastify/context.rs` + `app.rs` (including a hardcoded "email" field probe that was spamming unrelated output on every JSON body parse). Side effect: gap suite jumped from 14/28 @ 117 diffs to 22/28 @ 29 diffs since async closures are load-bearing across test_gap_class_advanced/node_*/typeof_instanceof/etc.
 - **v0.5.141** — Two follow-ups from the v0.5.140 CI run: (1) Ubuntu `ui/styling/counter_card.ts` hit `undefined reference to perry_ui_widget_set_border_color` / `_set_border_width` — same pattern as v0.5.136's `buttonSetContentTintColor` (declared in perry's dispatch table, not exported by perry-ui-gtk4 because GTK4 borders are CSS-driven). Dropped the two calls from the example, documented inline. (2) Windows `cargo build -p perry-ui-windows` hit `E0505: cannot move out of out because it is borrowed` in `encode_png_rgba` — the early-return-on-header-error kept `encoder`'s borrow of `out` alive across the `return`. Restructured to commit the encoder's success/failure to a local `bool` and clear `out` after the borrow ends.

Cargo.toml

@@ -104,7 +104,7 @@ opt-level = "s"       # Optimize for size in stdlib
 opt-level = 3
 
 [workspace.package]
-version = "0.5.142"
+version = "0.5.143"
 edition = "2021"
 license = "MIT"
 repository = "https://github.com/PerryTS/perry"