Nightly Build (2026-05-15)

Automated nightly build from main at cdfb411.

Built on 2026-05-15. This pre-release is replaced by each new nightly build.

0.7.1

[0.7.1] - 2026-04-29

🌐 Website

• Add version dispatch to playground engine (#467)
• Use static Vercel ignore config (#462)
• Refresh docs and website to match recent feature set (#460)
• Add website agent discovery metadata (#453)
• Scope Vercel builds to website changes (#455)

🏗️ Internal

• Update CHANGELOG.md for 0.7.0 (#457)

🐛 Fixed

• Fix microtask drain re-entrancy crashing async-generator yield rejection (#465)
• Fix generator loop resume and async iterator lookup (#456)
• Fix changelog website grouping (#459)

📖 Other

• Unify stdin handling across all three runners (#461)

0.7.0

[0.7.0] - 2026-04-29

✨ Improved

• Make fetch asynchronous with fetch manager (#396)
• Expand Test262 support for classes, functions, and typed arrays (#378)
• Expand typed array coverage across core methods (#367)
• Improve Temporal conformance and enable BigInt in test262 (#354)
• Include tests, benchmarks, and examples in nightly archives (#355)
• Report wall-clock timing for parallel runs (#318)
• Improve REPL object previews with depth-aware formatting (#296)
• Make import.meta tests account for Windows drive letters (#274)

🌐 Website

• Fix CSV and TSV header option examples (#452)
• Add agent discovery Link headers (#450)
• Declare Content Signals in robots.txt (#449)
• Enable markdown negotiation for agents (#451)
• Update playground examples and controls (#447)
• Add website Browserslist config (#446)
• Refine website landing and sandbox copy (#445)
• Update website API execution endpoints (#444)
• Fix Vercel ignore diff for shallow clones (#443)
• Fix website labels, hero console alignment, and example file extensions (#423)
• Unify website console output with shared ConsolePanel (#418)
• Skip Vercel preview builds for non-website changes (#414)
• Add Next.js 16 website (docs, playground, sandbox, install) (#407)

🏗️ Internal

• Extract shared text semantics utilities (#439)
• Update copyright year in LICENSE file (#384)
• Refactor engine around pluggable executors (#332)
• Update ECMAScript edition references to 2027 (#323)
• Refactor CLIs onto shared application framework (#299)
• Update docs (#302)
• Update CHANGELOG.md for 0.6.1 (#293)
• Refactor GC into Goccia.GarbageCollector (#254)

🐛 Fixed

• Fix generator continuation replay (#448)
• Fix CI cross toolchain resource compiler (#442)
• Fix ZonedDateTime DST-aware diff rounding (#435)
• Fix Temporal BigInt duration overflow (#431)
• Fix Windows parser CLI output assertions (#430)
• Fix unsupported var recovery before block close (#427)
• Fix for-of continue raising ReferenceError instead of skipping iteration (#425)
• Thread options through Temporal *.until / *.since methods (#417)
• Fix Number toString scientific notation threshold and format (#415)
• Fix decorator wrapper this-binding test gap and misdirecting warning (#416)
• Fix Array.prototype.slice for high-index array-like values (#411)
• Fix Object.isFrozen and Object.isSealed integrity checks (#412)
• Fix spyOn restore descriptor for re-spying (#397)
• Fix async parser scoping for default-parameter await (#393)
• Fix property redefinition rules for objects and arrays (#381)
• Handle EOF before REPL prompt on Windows (#385)
• Fix global descriptors for NaN, Infinity, and undefined (#380)
• Fix version constant propagation in CI build (#363)
• Fix BigInt Test262 compliance gaps (#361)
• Fix implicit Symbol→string coercion gap in ToStringLiteral (#357) (#359)
• Fix trailing-dot numeric literals and spread tokenization (#345)
• Handle Infinity in Number parsing tests (#331)
• Fix Temporal invalid-input errors to RangeError (#319)
• Fix lexically aware template boundaries and line terminators (#287)
• Fix nested backtick formatting in template literal docs (#284)
• Fix template escaping at interpolation boundaries (#278)
• Fixes tagged template object identity (#275)

📖 Other

• Embed IANA timezone data for Temporal (#440)
• Unify CLI JSON reporting (#433)
• Strengthen test262 runner and ECMAScript edge-case coverage (#402)
• Skip unsupported generator methods during parsing (#388)
• Infer names for anonymous classes and object functions (#387)
• Honor root config precedence for per-file CLI options (#382)
• Apply per-file config across all CLI apps (#373)
• Integrate REPL with CLI application framework (#372)
• Integrate JSX source map for coverage branch hit positions (#202) (#364)
• Recompute ZonedDateTime UTC offset after rounding (#358) (#362)
• Expose build date in version metadata (#360)
• Require BigInt for Temporal epoch nanoseconds (#346)
• Simplify hasOwnProperty shim binding (#347)
• Reject mixed stdout benchmark report formats (#340)
• Suppress progress output in structured and worker paths (#334)
• Restructure sources under source/ and rename build artifacts (#333)
• Validate Temporal.Duration field magnitudes (#328)
• Use shared Temporal property names in PlainDate parsing (#315)
• Use ConstructorToIndex for ArrayBuffer length (#316)
• Align error suggestions across builtins and runners (#308)
• Suppress CLI output from worker threads (#307)
• Deduplicate JSON string escaping helpers (#305)
• Docs, compiler type rules, and VM OP_CHECK_TYPE helper (#300)
• await-using tests: add microtask-boundary ordering assertions (#298)
• Recognize LS/PS as line terminators in lexer (ES2026 §12.3) (#285)
• Restructure built-in registration (#286)

🚀 Added

• Implement WeakMap and WeakSet built-ins (#437)
• Implement TC39 pattern matching (#438)
• Add generator and async generator support (#432)
• Add generated sources to CI FPC search path (#441)
• Add native TLS transport backends (#428)
• Support set-like operands for Set methods (#429)
• Implement smallestUnit, roundingMode, roundingIncrement for Temporal until/since (#424)
• Add receiver brand checks to Set/Map prototype methods (#421)
• Support destructuring into member expression targets (#413)
• Add fetch host allowlist support (#395)
• Add fetch host allowlist support (#391)
• Add opt-in function keyword support (--compat-function) (#390)
• Add unsafe Function constructor support (#386)
• Add void operator support (#389)
• Support array methods on array-like receivers (#383)
• Add compat var declarations (#368)
• Add Function.prototype.constructor per ES spec (#370)
• Implement Function.prototype.toString (#366)
• Add BigInt64Array and BigUint64Array support (#365)
• Add call stack depth limit with bytecode VM trampoline (#356)
• Add config file discovery for CLI apps (#353)
• Add GC memory ceiling and exposed counters (#351)
• Add nightly release and update artifact actions to v7 (#352)
• Add console output callback and remove Silence() anti-pattern (#350)
• Add instruction counter / interrupt handler with configurable limit (#349)
• Add --unsafe-ffi CLI toggle for FFI (#348)
• Implement BigInt spec support (#343)
• Add Object.hasOwn-backed hasOwnProperty shim (#344)
• Add Test262 bytecode support gaps (#341)
• Add Goccia.gc manual garbage collection hook (#342)
• Add fcl-net and OpenSSL to cross-build toolchain (#339)
• Add native fetch, Headers, and Response support (#338)
• Add CSV and TSV built-ins with module imports (#337)
• Enable strict types by default for bytecode executor (#336)
• Add default builtin shims for legacy globals (#330)
• Support ZonedDateTime relativeTo in Temporal duration ops (#329)
• Add Temporal.Duration.round support for relativeTo (#327)
• Add Temporal.Duration.prototype.total relativeTo support (#324)
• Add standalone GocciaBundler build target and CLI (#322)
• Support iterable inputs in Map.groupBy (#317)
• Add watchdog timeout to worker-thread test runs (#314)
• Add parallel execution for multi-file runners (#306)
• Add JSONC support for structured module globals (#304)
• Add explicit resource management support (#290)
• Add per-file timeouts and test262 harness updates (#297)
• Add support for RegExp modifier groups (#295)
• Implement Source Maps (TC39 Source Map v3) (#289)
• Support regex duplicate named capture groups (#291)
• Add JSON.rawJSON and JSON.isRawJSON (#288)
• Add dynamic import support to the runtime (#282)
• Implement TC39 Template Literal Revision for tagged templates (#281)
• Add encodeURI / decodeURI / encodeURIComponent / decodeURIComponent (#280)
• Add missing Temporal built-ins and options support (#277)
• Add URL and URLSearchParams built-ins (#273)
• Add ToObject coercion for primitives across all Object.* static methods (#271)
• Add Goccia.build platform metadata (#276)
• Add TextEncoder and TextDecoder built-ins (#272)
• Implement import.meta support (#265)
• Add tagged template literal support (#267)
• Add Float16Array and Math.f16round (ES2025) (#262)
• Add resizable ArrayBuffer support and transfer APIs (#266)
• Add support for class static blocks (#264)
• Add Object.getOwnPropertyDescriptors support (#261)
• Add logical assignment operators (#259)
• Add numeric separator support in number literals (#258)
• Add Uint8Array Base64 and Hex APIs (#260)
• Add Iterator.zip and zipKeyed helpers (#257)
• Add atob and btoa global functions (#256)
• Add reviver source context to JSON.parse and JSON5.parse (#255)
• Add Iterator.concat support (#253)
• Add RegExp.escape support (#252)
• Add top-level await and for-await-of support (#251)

0.6.1

[0.6.1] - 2026-04-09

🏗️ Internal

• Strip symbols before staging build artifacts (#245)
• Extract shared ToPropertyDescriptor helper (#239)

🐛 Fixed

• Route Reflect.set receiver [[DefineOwnProperty]] through TryDefineProperty (#247)
• Thread optional receiver through Reflect.get and Reflect.set (#243)
• Fix Reflect.construct prototype setup (#241)

📖 Other

• Streamline project docs and contributor guidance (#250)
• VM improvements including fixing AArch64 Int64-to-Double conversion paths (#242)

🚀 Added

• Add automated changelog generation with git-cliff (#248)
• Add Error.cause support (#249)
• Support array-like arguments for apply and Reflect (#244)

0.6.0

What's Changed

• Add public Goccia.semver API namespace by @frostney in #192
• Add coverage reporting to ScriptLoader and TestRunner by @frostney in #201
• Merge GocciaScript metadata into Goccia global by @frostney in #204
• Make String.prototype.matchAll return a lazy iterator by @frostney in #206
• Add named capture groups and Unicode sets flag for RegExp by @frostney in #207
• Improve parser error context and diagnostics by @frostney in #205
• Implement full ECMAScript Unicode RegExp semantics by @frostney in #208
• Strip release artifacts and bake production version info by @frostney in #211
• Remove obsolete multihelpers mode switch by @frostney in #213
• Remove dead code and unused imports by @frostney in #212
• Fix YAML harness cleanup on parse failure by @frostney in #218
• Include zero-hit executable lines in coverage reports by @frostney in #219
• Add opt-in automatic semicolon insertion by @frostney in #220
• Add mock() and spyOn() test APIs by @frostney in #210
• Add onTestFinished cleanup hook to test framework by @frostney in #223
• Add explicit FFI support for native shared libraries by @frostney in #209
• Build 32-bit FFI fixture DLL on Windows CI by @frostney in #227
• Add a test262 conformance harness by @frostney in #222
• Add test262 conformance harness and CI support by @frostney in #234
• Implement Proxy builtin and traps by @frostney in #226
• Add Reflect API by @frostney in #228
• Replace VM register arrays with contiguous stack (+28% bytecode throughput) by @frostney in #235
• Update unsupported CPU target case in CI workflow by @frostney in #217
• Add bytecode VM profiling support by @frostney in #237

Full Changelog: 0.5.1...0.6.0

0.5.1

What's Changed

• Unify newline handling for text file inputs by @frostney in #193
• Add default GitHub issue template by @frostney in #195
• Handle mixed type-only imports and exports by @frostney in #194
• Add pull request template checklist by @frostney in #196
• Add CLAUDE.md symlink to AGENTS.md by @frostney in #197
• Update repository skills by @frostney in #199
• Report bytecode timing phases separately by @frostney in #198
• Add bytecode REPL timing mode by @frostney in #200

Full Changelog: 0.5.0...0.5.1

0.5.0

What's Changed

• Add YAML parsing and module imports by @frostney in #166
• Fix cross builds for fcl-base units by @frostney in #171
• Enforce private static brand checks by @frostney in #168
• Stage CI and release artifacts from top-level dpr binaries by @frostney in #169
• Add RegExp support and regex-aware expect.toMatch by @frostney in #172
• Fix cross-build linking for RegExpr units by @frostney in #180
• Allow string-literal module export names by @frostney in #181
• Add JSONL runtime parsing and module imports by @frostney in #182
• Add Vitest lifecycle and structure APIs by @frostney in #184
• Add TOML parsing, globals, and compliance checks by @frostney in #183
• Normalize TOML multiline strings to LF across platforms by @frostney in #186
• Add namespace imports for script and data modules by @frostney in #185
• Preserve UTF-8 parser inputs on Windows by @frostney in #188
• Add JSON5 parsing and stringify support by @frostney in #189
• Ignore leading shebang lines in the lexer by @frostney in #191
• Add .txt and .md text asset imports by @frostney in #190

Full Changelog: 0.4.0...0.5.0

0.4.0

What's Changed

• Add async, await and for [await] ... of by @frostney in #36
• Add [Shared]ArrayBuffer and TypedArray implementations by @frostney in #37
• Add bytecode and vm by @frostney in #38
• Feature parity between bytecode mode and interpreter mode by @frostney in #39
• More bytecode optimisation by @frostney in #40
• Remove type annotations on enum field level by @frostney in #41
• Strict types in bytecode VM by @frostney in #42
• Inline paths where possible by @frostney in #43
• Update documentation by @frostney in #44
• Fix switch default clause not participating in fallthrough by @frostney in #47
• Environment specific test failure by @frostney in #48
• De-couple control flow from exception flow by @frostney in #45
• Allow to suppress console output on native tests by @frostney in #49
• Refactor dispatch evaluator by @frostney in #51
• Fix increment/decrement for computed member expressions by @frostney in #54
• GocciaScript bytecode benchmarks in PRs by @frostney in #55
• First draft of WAM output through Souffle VM by @frostney in #53
• Fix class expression super() bytecode crash in decorator wrapping benchmark by @frostney in #56
• Fix to resolve Windows 32-bit Out Of Memory benchmark tests by @frostney in #57
• CI job independence by @frostney in #59
• Promise and iterator optimisations by @frostney in #58
• Unify garbage collector by @frostney in #60
• Change wasm-tests CI to run Node harness instead of Pascal harness by @frostney in #61
• Potential Windows BenchmarkRunner fixes by @frostney in #62
• Add Performance built-in API by @frostney in #63
• for of array fast path by @frostney in #64
• Replace TStringBuilder with TStringBuffer by @frostney in #65
• Garbage collector memory optimization by @frostney in #67
• Update Github action steps to include test matrix for bytecode and interpreter by @frostney in #68
• Enable autoInline optimization by @frostney in #70
• Bytecode endianness portability by @frostney in #72
• High benchmark variance by @frostney in #69
• Mark SouffleIsTrue as inline for hot-path branch elimination by @frostney in #73
• Remove dead decorator class bridge code by @frostney in #75
• Replace double-negation unary + with OP_RT_TO_NUMBER by @frostney in #80
• Pre-materialize constant pool into TSouffleValue array on template load by @frostney in #82
• Extend constant folding with boolean NOT, typeof, and logical operators by @frostney in #85
• Benchmark tests regression by @frostney in #92
• Benchmark runner exit codes by @frostney in #90
• Remove unused typed local opcodes from compiler and VM by @frostney in #74
• Promote 10 hot opcodes into main VM dispatch loop by @frostney in #81
• Eliminate redundant OP_MOVE in plain function call compilation by @frostney in #86
• Optimize bridge cache: dirty flag and single-lookup reverse map by @frostney in #89
• Add Tier 1 OP_NOT and OP_TO_BOOL opcodes for inline boolean coercion by @frostney in #76
• Add record/delegate fast path for OP_RT_GET_PROP in VM by @frostney in #83
• Experiment: SOUFFLE_INLINE_STRING_MAX = 13 by @frostney in #96
• Fix FPC 3.2.2 internal error on CI prod builds by @frostney in #98
• Bypass interpreter bridge for blueprint-backed class construction by @frostney in #87
• Unify blueprint bridge on ConvertBlueprintToClassValue by @frostney in #100
• Set prototype.constructor on native blueprint construct path by @frostney in #102
• Update hashmap hierarchy to improve performance by @frostney in #66
• Convert spike PDFs to Markdown, update VM docs, add optimization log by @frostney in #105
• Add cross-compilation toolchain workflow by @frostney in #93
• Fix Failed Tests summary missing assertion failures by @frostney in #111
• Eliminate interpreter bridge for async/await in bytecode mode by @frostney in #110
• Add record fast path for OP_RT_SET_PROP in VM dispatch by @frostney in #108
• Eliminate interpreter bridge for module loading in bytecode mode by @frostney in #107
• Add Souffle-value-backed Map/Set types and native callback fast paths by @frostney in #109
• Refactor built-in object model registration by @frostney in #136
• Fold Souffle VM directly into GocciaScript by @frostney in #137
• Support reading ScriptLoader source from stdin by @frostney in #138
• Add structured JSON output to ScriptLoader by @frostney in #139
• Test JSON output via public CLI surface by @frostney in #142
• Allow Windows CRLF in ScriptLoader CLI checks by @frostney in #143
• Add ScriptLoader CLI globals injection by @frostney in #140
• Add ScriptLoader execution timeout support by @frostney in #141
• Use range-based benchmark comparison in PR comments by @frostney in #144
• Expand JSON.stringify error coverage by @frostney in #145
• Add nullish coalescing assignment operator by @frostney in #146
• Harden OrderedStringMap tombstone compaction by @frostney in #148
• Refresh JS conformance suite and tighten runtime parity by @frostney in #147
• Fix ModuleResolver alias segment boundary matching by @frostney in #149
• Add ScriptLoader import maps and goccia.json discovery by @frostney in #151
• Fix JSON stringify round-trip precision by @frostney in #163
• Extract standalone module loader for module content providers by @frostney in #162
• Add Vitest-style matcher support for test assertions by @frostney in #164

Full Changelog: 0.3.0...0.4.0

0.3.0

What's Changed

• Warning when using unsupported features by @frostney in #15
• JSX parsing as source-to-source pre-pass by @frostney in #16
• fix import clauses (remove or move from interface to implementation) by @frostney in #18
• Add module resolver by @frostney in #17
• REPL History + Color formatting by @frostney in #19
• Add iterators by @frostney in #20
• Remove the usage of interfaces by @frostney in #21
• Print LOC and SLOC as part of the build process by @frostney in #22
• Add stack property for errors by @frostney in #23
• Add tests for nested loops by @frostney in #26
• Refactor: Split constants by @frostney in #25
• Add stucturedClone by @frostney in #24
• Fix windows build on line breaks by @frostney in #27
• Disable runtime checks for production builds by @frostney in #28
• Create BindingMap for Scope and pre-typed array callbacks by @frostney in #29
• First draft of re-ordering maps functionality by @frostney in #30
• Add command-line flags to TestRunner by @frostney in #31
• Add wildcard, function, loose equality and label to unsupported features by @frostney in #32
• Enum support by @frostney in #33
• Add Map#getOrInsert[Computed], Error.isError, Math.sumPrecise by @frostney in #34
• Add decorators by @frostney in #35

Full Changelog: 0.2.0...0.3.0

0.2.0

Full Changelog: 0.1.0...0.2.0

What's Changed

• Switch to microsecond timing and improve benchmarks by @frostney in #1
• Promises by @frostney in #2
• Add Temporal API by @frostney in #3
• Update binary upload to exclude test files by @frostney in #4
• Fix test suites for further ECMAScript compatibility by @frostney in #5
• Add queueMicrotask functionality by @frostney in #6
• Refine code style guide and auto-fix files by @frostney in #7
• Add workspace settings and extensions for VSCode by @frostney in #8
• Add native tests for TestAssertions by @frostney in #9
• Fixes Temporal Duration total edge case and GC collection by @frostney in #10
• Fix edge cases for special values by @frostney in #11
• Add code convention on abbreviations by @frostney in #12
• Named exports modules by @frostney in #13
• Type annotations as comments by @frostney in #14

New Contributors

• @frostney made their first contribution in #1

Full Changelog: 0.1.0...0.2.0