0.1.0

0.1.0 (2026-10-18)

🚀 Features

• maple: add Object.preventExtensions and Object.isExtensible (eadeac5)
• maple: add the Maple interpreter (94eda74)
• maple: answer "in" for the methods of a value's type (b42e35f)
• maple: carry the indices of a match made with the d flag (d50ea30)
• maple: convert Maple's own values to primitives through their class (97be6fe)
• maple: ignore debugger statements and add escape and unescape (b61d9be)
• maple: let scripts add properties to built-ins for the length of a run (13a968b)
• maple: let scripts add properties to errors, functions and wrappers (09e5fe8)
• maple: run what js-interpreter runs (13eb8ed)
• maple: support the cause option of the Error constructors (09c230f)
• maple: take a method's receiver from the call (c1e71ac)

🩹 Bug Fixes

• maple: add valueOf to numbers and strings (ede9d90)
• maple: cap the nesting of values copied from the host (d5eb307)
• maple: close the iterator when an iterator helper fails (02240a7)
• maple: close the iterator when take or drop rejects its count (9c2742a)
• maple: convert the limit of split without a separator with ToUint32 (f8d23b1)
• maple: copy uncaught errors to the host without cycles and bounded in size (590b19e)
• maple: count nested errors' text against an uncaught error's budget (d262f21)
• maple: drop constructor keys when a value leaves the sandbox (c0cfaae)
• maple: give errors thrown inside a conversion a position and a stack (507f55b)
• maple: give nested runs their own state for built-ins (8f6229e)
• maple: give objects without a prototype no Object.prototype behaviour (e6d0d76)
• maple: hide host exception messages from scripts unless marked with exposed (5bc3109)
• maple: keep an error's name and message as assigned and convert them as JavaScript does (2ee7621)
• maple: keep holes as holes in sort and reverse (42833bf)
• maple: keep lastIndex on a frozen RegExp (e851e9f)
• maple: make Intl TypeErrors in Array.prototype.toLocaleString catchable (9d43f5d)
• maple: name a value in an error message without converting it (7bcfb24)
• maple: name only the root in errors about deeply nested host values (16b71da)
• maple: read a host exception's name and message defensively (fb7a1bd)
• maple: read each element when the array callback methods reach it (ac97e1f)
• maple: refuse a RegExp in startsWith, endsWith and includes (0549dd8)
• maple: reject a non-numeric RegExp lastIndex at the boundary (3fff312)
• maple: report values nested too deep for the boundary as script errors (9ce371f)
• maple: return the element the predicate saw from find and findLast (405770d)
• maple: revoke the sandbox handle once the intrinsic has returned (8496236)
• maple: run only source text that Maple parses itself (c06f57e)
• maple: skip a key that for...in deletes before visiting it (64c6f8e)
• maple: start setYear on an invalid Date from local midnight (d7675b8)
• playground: read js-interpreter's result on the host so the context cannot shadow it (2f70094)

📖 Documentation

• ai: make JavaScript the reference instead of js-interpreter (8158b0c)
• cleanup maple documentation (557272e)
• drop any mentions of outdated folder structure in AGENTS.md and spec.md (8803738)
• maple: define secure as isolation, not resource limits (011bcc4)
• maple: say JavaScript instead of "the language" (8f1cabf)
• maple: update README (bba28e2)
• parity: group the divergences by whether Maple follows the language (0791c28)
• rewrite readmes and add AGENTS.md (6786c4a)
• update READMEs (9a6762c)

🔧 Miscellaneous Chores

• playground: add run limits, stats and inline errors (1686325)
• playground: compare Maple with js-interpreter (7703a3c)
• playground: return the greeting in the default code (b492ee3)

🛠️ Code Refactoring

• maple: give each built-in type a prototype that holds its methods (a54d14e)
• maple: give every own property of Maple's values JavaScript's attributes (493b18d)
• maple: give Maple's own values a base class that holds their properties (1f37ca1)
• maple: restructure array builtin for better readability and discoverability (c241806)
• maple: restructure boolean builtin for better readability and discoverability (ee4fd87)
• maple: restructure date builtin for better readability and discoverability (ea68b50)
• maple: restructure error builtin for better readability and discoverability (355cc99)
• maple: restructure function builtin for better readability and discoverability (a058d53)
• maple: restructure iterator builtin for better readability and discoverability (b76b0a2)
• maple: restructure json builtin for better readability and discoverability (4027aa0)
• maple: restructure map builtin for better readability and discoverability (05bd0fe)
• maple: restructure math builtin for better readability and discoverability (f3b955b)
• maple: restructure number builtin for better readability and discoverability (4157a7f)
• maple: restructure object builtin for better readability and discoverability (6cb88ef)
• maple: restructure regexp builtin for better readability and discoverability (9ea2e4e)
• maple: restructure set builtin for better readability and discoverability (59d1583)
• maple: restructure string builtin for better readability and discoverability (7895f7d)
• maple: take substr from the host (45fd612)

🧪 Tests

• parity: hold Maple to everything js-interpreter runs (e116481)
• parity: run every case in Node as well (18b386b)

📦 Build System

• add test:watch script (13c5d0a)
• ai: update Agents.md (79a53dc)

🔄️ Continuous Integration

• add changelog-preview comments (046dba9)
• enable npm publishing (e68b534)
• skip npm auth until the first release (8b8939d)
• skip the changelog preview for pull requests from forks (c7ce28f)