1.0.0

Fixed

• CodeGen: fmt.Fprintln / fmt.Fprint dropped arguments beyond the first — when writing to a strings.Builder, bytes.Buffer, or generic io.Writer with more than one value argument (e.g. fmt.Fprintln(&b, "hello", "world")), only the first argument was formatted. A new _buildFprintSprintfCall helper now constructs the correct __sprintf call with one %v placeholder per argument (space-joined for Fprintln/Fprint, newline-appended for Fprintln).
• Parser: generic instantiation with user-defined type arg in argument position — Identity[MyType] (where MyType is an uppercase, non-builtin identifier) is now correctly recognised as a generic type instantiation rather than an index expression when it appears as a function argument before , or ). looksLikeTypeArgList() now tracks uppercase-starting identifiers as a third disambiguation signal alongside built-in type keywords and comma-separated arg lists.
• CodeGen: silent wrong output on unsupported complex compound assignment — _genComplexCompoundAssign previously emitted lhs = rhs (dropping the operator) for any compound assignment operator other than +=, -=, *=, /=. The default branch now throws an internal error, ensuring unsupported operators are caught loudly rather than producing silently incorrect JS.

Changed

• CodeGen: gom property-setter dispatch — Class, Type, Href, Src, and Placeholder are now resolved via a GOM_PROP_SETTERS lookup table instead of five identical switch cases, consistent with the existing GOM_ATTR_HELPERS and GOM_BOOL_ATTRS tables.
• dts-parser: per-declaration error recovery — a malformed declaration in a .d.ts file no longer aborts the entire parse. The parser now wraps each top-level declaration in a try/catch, skips to the next ; or } on failure, and emits a console.warn with the offending keyword and error message. Well-formed declarations after the bad one are still parsed.
• CodeGen: fmt.Sscan / Sscanln / Sscanf deduplication — the shared scanning loop (type-coercion and pointer-write logic) is extracted into a module-level _SSCAN_LOOP constant, eliminating the three near-identical inline lambda bodies.
• TypeChecker: stdlib split — src/typechecker/stdlib.js (previously ~1050 lines) is now a 16-line orchestrator that delegates to two focused modules: stdlib/core.js (browser globals, fmt, strings, bytes, strconv, sort, math, errors, time, unicode, os, slices, html, io) and stdlib/extended.js (gom, maps, regexp, rand, utf8, path, strings.Builder/bytes.Buffer, built-in functions). This improves cohesion without adding cross-layer import edges.
• Architectural quality gate (Sentrux) — adopted Sentrux for structural quality enforcement. Layer boundaries, coupling, cyclomatic complexity, and import cycles are checked on every npm run check run via .sentrux/rules.toml. A regression floor is stored in .sentrux/baseline.json (current quality signal: 6447/10000). The layer model is: cli(0) → support(1) → codegen(2) → typechecker(3) → parser(4) → lexer(5) → types(6).