PerryTS
diff --git a/‎CLAUDE.md‎
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@@ -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:** 0.5.341
+**Current Version:** 0.5.342
 
 ## 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.
 
+- **v0.5.342** — Tier 2.1 final extraction: moves the per-platform link command construction out of `crates/perry/src/commands/compile.rs::run_with_parse_cache` into a new `compile/link.rs` sub-module. Pre-extraction this was a single ~1240-LOC inline block fanning out across macOS / iOS / tvOS / visionOS / watchOS / Android / Linux / Windows + 5 cross-compile permutations — every platform-specific link flag change churned the orchestrator file. The new `pub(super) fn build_and_run_link(args_input, ctx, target, obj_paths, compiled_features, runtime_lib, stdlib_lib, jsruntime_lib, exe_path, format) -> Result<()>` takes 10 params (no struct needed once `is_*` flags get re-derived from `target` internally) and owns: (1) per-platform `Command::new(...)` selection — clang on macOS/iOS, swiftc on watchOS/visionOS, Android NDK clang, lld-link / link.exe on Windows, ld64.lld on Linux→Apple cross paths, plus the matching SDK / sysroot / triple discovery via `xcrun --sdk ... --show-sdk-path` / `--find clang` / `--find swiftc`. (2) entry-object `_main` rename via `rust-objcopy --redefine-sym` for watchOS / visionOS Swift-app shells (`_main → _perry_main_init`) and iOS / tvOS / watchOS game-loop variants (`_main → __perry_user_main`). (3) accumulating object files + dead-strip flags (`-Wl,--gc-sections` / `-dead_strip` / `-Xlinker -dead_strip` / `/OPT:REF /OPT:ICF`). (4) library link order — jsruntime → runtime fallback → stdlib precedence rules (the comment explains the Mach-O first-wins vs ELF `--allow-multiple-definition` vs MSVC `/FORCE:MULTIPLE` differences). (5) `-o exe_path` / `/OUT:...`. (6) plugin-host `-Wl,-u,_<sym>` force-keep + `-rdynamic` on Linux. (7) per-platform framework / system-lib enumeration (UIKit / SwiftUI / AVFoundation on Apple, GTK4 via `pkg-config --libs gtk4` with hardcoded fallback on Linux, Win32 system libs on Windows, Android stub for `JNI_GetCreatedJavaVMs`). (8) UI lib + strip-dedup invocation + GTK4 `--whole-archive` for `js_stdlib_process_pending`. (9) geisterhand lib link + Windows `/INCLUDE:` symbol force-references. (10) external `perry.nativeLibrary` manifest crates: `cargo build --release [+nightly] [-Zbuild-std] --manifest-path` per crate, find the resulting staticlib, framework / lib / pkg-config additions, swiftc compilation of manifest-declared `swift_sources` for `--features watchos-swift-app` (with deduplication via `seen_swift_sources: HashSet<PathBuf>`), and metal-source target validation. (11) `cmd.status()?` invocation + bail on non-zero. **Visibility changes**: 0 — every helper called by the new module is already `pub(super)` from the prior 9 sub-module extractions in this Tier 2.1 stack. The new module accesses `find_geisterhand_*`, `find_ui_library`, `find_lld_link`, `find_msvc_link_exe`, `find_perry_windows_sdk`, `windows_pe_subsystem_flag`, `find_msvc_lib_paths`, `find_stdlib_library`, `find_llvm_tool`, `find_visionos_swift_runtime`, `find_watchos_swift_runtime`, `apple_sdk_version`, `strip_duplicate_objects_from_lib`, `build_geisterhand_libs`, and `rust_target_triple` (compile.rs's own private fn — accessible to children) via `super::*`. **Argument-passing approach**: the call site is in `run_with_parse_cache` AFTER `args.output` has already been consumed by `unwrap_or_else` (line 2429 in old numbering), so the function takes `args_input: &Path` (i.e. `&args.input`) rather than `&CompileArgs`. The other ~10 params are by reference — `&CompilationContext`, `Option<&str>`, `&[PathBuf]`, `&[String]`, `&Path` (×2), `&Option<PathBuf>` (×2), and `OutputFormat` by value (Copy). The dylib link path stays inline in `run_with_parse_cache` because it returns early with a `CompileResult`; per-platform `.app` bundling (iOS / visionOS / watchOS / tvOS) and Android `.so` companion-lib copying also stay inline since they happen after the link returns and depend on many post-link variables (`result_bundle_id`, `result_app_dir`, etc.). **`is_cross_*` cleanup**: `is_cross_windows`, `is_cross_ios`, `is_cross_visionos`, `is_cross_macos`, and `is_cross_tvos` were all only used inside the extracted block. Their declarations have been removed from `compile.rs`; the new `link.rs` re-derives them internally from `target`. **compile.rs delta**: 5019 → 3783 LOC (-1236, ~25% reduction). **Cumulative across this session** (v0.5.329-v0.5.342, fourteen commits): **compile.rs 9391 → 3783 LOC (~60% total reduction)**, lower_call.rs 7000+ → 4681 LOC (~33%), lower.rs 13591 → 7554 LOC (~44%), `lower::lower_expr` 6687 → 624 LOC (~91%). compile.rs is now ~40% of its starting size; what remains is the orchestrator entry points (`run`, `run_with_parse_cache`), context construction (`CompilationContext::new`), and the parse / typecheck / lower / codegen / cache pipeline — i.e. exactly what an orchestrator file should hold. The full `compile/` sub-module structure has 10 focused files: parse_cache (294 LOC), strip_dedup (518), library_search (704), targets (824), object_cache (747), resolve (849), optimized_libs (413), collect_modules (412), and now link (1245). **What still works**: cargo build --release clean; cargo test --workspace 434/0/5 = baseline; gap tests 25/28 = baseline (the 3 failing — `array_methods`, `console_methods`, `typed_arrays` — pre-existing categorical/CI gaps, not regression-induced); doc-tests --skip-xcompile 80/82 = baseline (the lone fail is the pre-existing `ui/gallery.ts` retina screenshot drift); UI smoke compile (`App({title, body: VStack([Text("OK"), Button("Click", () => {})]) })`) produces a 856K macOS binary that exits 0 in `PERRY_UI_TEST_MODE=1`, and the strip-dedup output (419 → 35 trimmed objects via 178 by-symbol-subset + 222 by-name-pattern + 16 rlib-extracted + 19 kept) matches v0.5.341 byte-for-byte — proves the live path through library_search + targets + strip_dedup + ObjectCache + resolve + link all works end-to-end. **Cumulative across this session** (v0.5.329-v0.5.342, fourteen commits): every plan item delivered, plus four follow-up rounds extracting roughly 13,200 LOC across 18 new sub-modules into the largest cognitive-load reduction in the project's history. Tier 2.1 is now complete.
 - **v0.5.341** — Tier 2.1 final round: extracts the last two big bounded chunks of compile.rs. (1) **`compile/optimized_libs.rs`** (~390 LOC moved): the auto-rebuild driver that picks the smallest matching Cargo feature set for the user's TS code. Contains the `OptimizedLibs` struct + impl + `build_optimized_libs` fn (the cargo + workspace + target-dir hash-keyed driver) + the doc explaining the panic-mode + feature-derivation logic. Both runtime and stdlib halves fall back to the prebuilt libraries gracefully on failure. The hash-keyed `target/perry-auto-{:016x}` dir means consecutive runs with the same profile are no-ops after the first build. (2) **`compile/collect_modules.rs`** (~390 LOC moved): the transitive import-walk that builds `CompilationContext.native_modules` / `js_modules`. Walks the import graph from the entry file, lowers every TypeScript module to HIR, classifies each as native-compiled vs JS-runtime-loaded, and runs per-module HIR passes (`inline_functions`, `transform_generators`) before adding to context. Source hashes feed the V2.2 codegen cache key derivation. **Cumulative deltas this commit**: compile.rs 5795 → 5019 LOC (-776, ~13%). **Cumulative across the entire session** (v0.5.329-v0.5.341): **compile.rs 9391 → 5019 LOC (~47% total reduction)**, lower_call.rs 7000+ → 4681 LOC (~33%), lower.rs 13591 → 7554 LOC (~44%), `lower::lower_expr` (the most-cited monolith) 6687 → 624 LOC (~91%). compile.rs is now nearly half its starting size; what remains is the `run_with_parse_cache` orchestrator + `CompilationContext::new` + `build_link_command` (the bulk — the inline link command construction that fans out per-platform). Further splits would be possible but each would require careful coordination of the 30+ helper variables threaded through `build_link_command`. **What still works**: cargo build --release clean; cargo test --workspace 434/0 = baseline; gap tests 25/28 = baseline; doc-tests --skip-xcompile 80/82 = baseline; multi-module #212 closure-capture smoke matches Node byte-for-byte. **The final compile/ sub-module structure** has 9 focused files: parse_cache (294 LOC), strip_dedup (518), library_search (704), targets (824), object_cache (747), resolve (849), optimized_libs (413), collect_modules (412). **Cumulative across this session** (v0.5.329-v0.5.341, thirteen commits): every plan item delivered, plus four follow-up rounds extracting roughly 12,000 LOC across 17 new sub-modules into the largest cognitive-load reduction in the project's history.
 - **v0.5.340** — Tier 2.1 + 2.2 mass follow-up: completes the lower_call.rs split with the 805-LOC `lower_native_method_call` that v0.5.339 deferred, plus the next four big chunks of compile.rs (per-target codegen orchestrators, on-disk object cache, npm/module resolution). Four extractions in one PR. **lower_call.rs `lower_native_method_call`** (1 new sub-module, 805 LOC moved): `lower_call/native.rs` is the giant dispatcher routing `obj.method(args)` calls against native modules (mysql2, pg, redis, mongo, ws, fastify, fetch, perry/ui, perry/system, perry/i18n, perry/plugin, AbortController, …). Required bumping 14 helpers in `lower_call.rs` from private `fn` to `pub(super) fn` so the new sub-module can reach them via `super::` (perry_*_table_lookup family — UI / UI_INSTANCE / SYSTEM / I18N / PLUGIN / PLUGIN_INSTANCE — plus native_module_lookup, lower_perry_ui_table_call, lower_fetch_native_method, lower_abort_controller_call, lower_notification_schedule, find_outer_writes_stmt, is_abort_controller_expr, lower_native_module_dispatch, collect_closure_introduced_ids). The fn itself is `pub(crate)` (re-exported from lower_call.rs for callers in `crate::expr` that import directly). **compile.rs per-target orchestrators** (1 new sub-module, ~800 LOC moved): `compile/targets.rs` contains the 6 `compile_for_*` widget/web/wasm functions (ios_widget, watchos_widget, android_widget, wearos_tile, web, wasm) plus their supporting helpers (`generate_js_bundle`, `find_watchos_swift_runtime`, `find_visionos_swift_runtime`, `apple_sdk_version`, `lookup_bundle_id_from_toml`, `compile_metallib_for_bundle`). 12 fns hoisted to `pub(super)`. **compile.rs object cache** (1 new sub-module, ~440 LOC moved): `compile/object_cache.rs` contains `djb2_hash` + `Djb2Hasher` (the streaming hash accumulator) + `compute_object_cache_key` (the 246-LOC opts→key derivation) + the `ObjectCache` struct + impl + the 282-LOC `object_cache_tests` mod. Cluster moved together because they all relate to the V2.2 `.perry-cache/objects/<target>/<key>.o` codegen cache layout. `djb2_hash` re-exported as `pub` (used elsewhere in compile.rs); `compute_object_cache_key` is now `pub fn` so the resolve.rs sub-module's `cached_resolve_import` can keep calling it. **compile.rs resolve_import family** (1 new sub-module, ~810 LOC moved): `compile/resolve.rs` is the entire TypeScript / JavaScript module-resolution machinery: `find_perry_workspace_root` (workspace-marker walk), `find_node_modules` (walk-up search), `find_file_dep_in_package_json` (issue #209 file: dep resolution), `parse_package_specifier` / `resolve_with_extensions` / `resolve_package_entry` / `resolve_package_source_entry` / `resolve_exports` (per-segment resolution), `resolve_import` + `cached_resolve_import` (public entry + cache), `discover_extension_entries`, `compute_module_prefix`, plus the npm-package classification helpers (`has_perry_native_library`, `has_perry_native_module`, `parse_native_library_manifest`, `is_in_perry_native_package`, `extract_compile_package_dir`, `is_in_compile_package`) and the file-extension predicates (`is_js_file`, `is_ts_file`, `is_declaration_file`). 17 fns hoisted to `pub(super)` or `pub`. **Cumulative deltas this commit**: lower_call.rs 5085 → 4681 LOC (-404, ~8%); compile.rs 8057 → 5795 LOC (-2262, ~28%). **Cumulative across the entire session** (v0.5.329-v0.5.340): compile.rs 9391 → 5795 LOC (~38% reduction), lower_call.rs 7000+ → 4681 LOC (~33%), lower.rs 13591 → 7554 LOC (~44%), `lower::lower_expr` (the most-cited monolith) 6687 → 624 LOC (~91%). The single biggest cognitive-load reduction in the project's history. **What's still inline in compile.rs** (5795 LOC): the orchestrator entry points (`run`, `run_with_parse_cache`), context construction (`CompilationContext::new`), library/runtime building (`build_optimized_libs`, ~270 LOC), the link command construction (`build_link_command` and the inline body of `run_with_parse_cache`, the bulk of remaining LOC), and the v0.5.295 `find_clang` + Linux LLVM-prefix fallback. Each is independently extractable but doing more would shift this PR into rewrite-territory. **Verified**: cargo build --release clean; cargo test --workspace 434/0 = baseline; gap tests 25/28 = baseline; doc-tests --skip-xcompile 80/82 = baseline; comprehensive UI smoke (`App({ title, body: VStack([Text("OK"), Button("Click", () => {})]) })`) compiles to 0.9 MB binary, exits 0 in `PERRY_UI_TEST_MODE=1`, and the strip-dedup output (419 → 35 trimmed objects) matches v0.5.331 exactly — proves the live path through library_search + targets + strip_dedup + ObjectCache + resolve all works end-to-end. Multi-module #212 closure-capture smoke matches Node byte-for-byte. **Cumulative across this session** (v0.5.329-v0.5.340, twelve commits): every plan item delivered as full or pilot work, plus three rounds of follow-up extractions completing most of the cognitive-load reductions the plan called out.
 - **v0.5.339** — Tier 2.3 + 2.2 mass extraction: completes the lower_expr split (~all extractable arms shipped) and finishes the lower_call.rs follow-up that v0.5.334's `ui_styling` extraction left open. Three rounds in one PR. **Round 1 — Member + Assign + New** (3 new sub-modules, 1110 LOC moved out of lower_expr): `lower/expr_member.rs` (424 LOC) handles `obj.prop` / `obj["k"]` / `obj[i]` / namespace forms (`Math.PI`) / enum member access / private field reads / `Symbol.iterator` fast path. `lower/expr_assign.rs` (330 LOC) handles `=` / compound assigns / property assigns / index assigns / destructuring assigns; depends on `lower_expr_assignment` (now `pub(super) fn`) and the `destructuring::lower_destructuring_assignment` helper. `lower/expr_new.rs` (414 LOC) routes `new C()` calls to user-defined classes, built-in JS classes (Date / Map / Set / RegExp / Buffer / TypedArray*), and dynamic `new (someFn)()` form. **Round 2 — `lower_call.rs` `lower_builtin_new`** (1 new sub-module, 399 LOC moved): `lower_call/builtin.rs` handles `new C()` codegen for built-in classes (Date / Map / Set / Buffer / fetch Headers/Request/Response / mongodb MongoClient / redis Redis / fastify App / ws WebSocketServer / pg Client/Pool / perry/plugin Decimal / AsyncLocalStorage / AbortController / Command). Calling-side promoted to `pub(super) fn`; the parent module imports via the existing `mod builtin` pattern. (`lower_native_method_call` 805 LOC was assessed but skipped — its 20+ helper cross-references make safe extraction much riskier than the leverage warrants for a single PR; deferred to a focused follow-up.) **Round 3 — `lower_expr` Call arm** (1 new sub-module, 3986 LOC moved): `lower/expr_call.rs` is the giant call dispatcher — by far the largest single arm in the codebase, handling Math.* / JSON.* / fetch / native module method dispatch / class static methods / Symbol / Reflect / Proxy / built-in coercions / etc. Required bumping 6 helpers in lower.rs (`extract_typed_parse_source_order`, `resolve_typed_parse_ty`, `try_desugar_reactive_text`, `try_desugar_reactive_animate`, `is_widget_modifier_name`, `is_generator_call_expr`) from private `fn` to `pub(super) fn` so the new sub-module can reach them. **Cumulative `lower_expr` reduction**: 6687 LOC (original) → 624 LOC (~91% reduction). The function is now a thin dispatcher that delegates almost every arm to a focused sub-module. **Cumulative `lower.rs` reduction**: 13591 LOC → 7554 LOC (~44% reduction). **Cumulative `lower_call.rs` reduction across the session**: 7000+ LOC → 5085 LOC (~27% reduction since v0.5.328, combining Tier 1.3 dispatch tables + ui_styling + builtin extractions). **What remains**: `lower_native_method_call` in lower_call.rs (805 LOC, assessed risky in this round), per-target codegen orchestrators in compile.rs (~1200 LOC), `resolve_import` family (~600 LOC), `compute_object_cache_key` + `ObjectCache` (~700 LOC), `build_optimized_libs` + `build_link_command` (~2000 LOC). Each is independently extractable; doing them as focused PRs preserves reviewability. **Verified**: cargo build --release clean; cargo test --workspace 434/0 = baseline; gap tests 25/28 = baseline; doc-tests --skip-xcompile 80/82 = baseline; comprehensive smoke compile exercising Math.*, JSON.parse → array methods chain (`data.map(x => x*2).reduce(...)`), String methods, Object.{keys,values}, console.* with multiple args, class instantiation + chained calls inside .forEach, function call with rest spread (`sum3(...args)`) — all match `node --experimental-strip-types` byte-for-byte. **Cumulative across this session** (v0.5.329-v0.5.339, eleven commits): all 13 plan items shipped as full or partial extractions; lower_expr is now ~91% smaller; the giant arm split is the largest cognitive-load reduction in the entire session.