What's Changed

• introduce iterator helpers that manage recursion / time by @davidhewitt in https://github.com/pydantic/monty/pull/454
• fix interactions with global names, function scopes & repl by @davidhewitt in https://github.com/pydantic/monty/pull/469
• experiment with StringBuilder to guard strings under construction by @davidhewitt in https://github.com/pydantic/monty/pull/448
• fix type-object marshalling across the sandbox boundary by @samuelcolvin in https://github.com/pydantic/monty/pull/478
• FromArgs slots cleanup by @samuelcolvin in https://github.com/pydantic/monty/pull/484
• fix(file): release the buffered-file OS-call pin on all paths by @arkuhn in https://github.com/pydantic/monty/pull/485
• add __name__ et al. by @samuelcolvin in https://github.com/pydantic/monty/pull/495
• f-strings improvements by @samuelcolvin in https://github.com/pydantic/monty/pull/494
• fix: return error instead of panicking in ForIter heap read by @tontinton in https://github.com/pydantic/monty/pull/493
• Move execution to a subprocess pool by @samuelcolvin in https://github.com/pydantic/monty/pull/500
• Add 'Part of the Pydantic Stack' footer to README by @strawgate in https://github.com/pydantic/monty/pull/502
• fix(asyncio): raise RuntimeError on cross-gather coroutine reuse by @samuelcolvin in https://github.com/pydantic/monty/pull/503
• fix CI since subprocesses by @samuelcolvin in https://github.com/pydantic/monty/pull/505
• Async memory limits by @samuelcolvin in https://github.com/pydantic/monty/pull/504
• uprev ruff and ty crates by @samuelcolvin in https://github.com/pydantic/monty/pull/506
• move py_eq to accept &Value for RHS by @davidhewitt in https://github.com/pydantic/monty/pull/508
• use published ruff and ty crates by @samuelcolvin in https://github.com/pydantic/monty/pull/512
• reintroduce feed_start API to both python & JS by @davidhewitt in https://github.com/pydantic/monty/pull/507
• use stable clippy in ci by @samuelcolvin in https://github.com/pydantic/monty/pull/513
• Publish all library crates to crates.io by @samuelcolvin in https://github.com/pydantic/monty/pull/514
• websocket protocol by @samuelcolvin in https://github.com/pydantic/monty/pull/509
• Support multi-level (transitive) closure capture by @samuelcolvin in https://github.com/pydantic/monty/pull/516
• move recursion count from heap to VM by @davidhewitt in https://github.com/pydantic/monty/pull/511
• monty-cpython: rich sandbox tracebacks with source previews and carets by @samuelcolvin in https://github.com/pydantic/monty/pull/517
• fix various bugs with global name scoping by @davidhewitt in https://github.com/pydantic/monty/pull/510
• ci: try newer manylinux version by @davidhewitt in https://github.com/pydantic/monty/pull/519
• Add unicodedata module, refactor and improve FromArgs macros by @samuelcolvin in https://github.com/pydantic/monty/pull/522
• rename and change behaviour of external_lookup by @samuelcolvin in https://github.com/pydantic/monty/pull/520
• encode and decode codecs and error types by @samuelcolvin in https://github.com/pydantic/monty/pull/523
• Fix wasm CI by @samuelcolvin in https://github.com/pydantic/monty/pull/526
• Add resume_auto() to iteratively drive feed_start snapshots by @samuelcolvin in https://github.com/pydantic/monty/pull/527
• User-defined classes by @samuelcolvin in https://github.com/pydantic/monty/pull/515
• small perf wins by @samuelcolvin in https://github.com/pydantic/monty/pull/528
• Add benchmarks covering real agent workloads by @samuelcolvin in https://github.com/pydantic/monty/pull/530
• Bound native evaluate_function re-entry to prevent infinite recursion by @samuelcolvin in https://github.com/pydantic/monty/pull/529
• Restrict git commit and git push for claude by @samuelcolvin in https://github.com/pydantic/monty/pull/532
• Regex perf improvements by @samuelcolvin in https://github.com/pydantic/monty/pull/531
• String cheap wins (perf track 3) by @samuelcolvin in https://github.com/pydantic/monty/pull/537
• add ci stage for browser testing by @davidhewitt in https://github.com/pydantic/monty/pull/539
• prep for beta release by @samuelcolvin in https://github.com/pydantic/monty/pull/540
• Fixing CI for0.0.19-beta.2 by @samuelcolvin in https://github.com/pydantic/monty/pull/542
• merge DropWithHeap / DropWithVM by @davidhewitt in https://github.com/pydantic/monty/pull/521
• fix interned longint ops by @davidhewitt in https://github.com/pydantic/monty/pull/547
• Add per-crate READMEs, rename monty-cli to monty-runtime by @samuelcolvin in https://github.com/pydantic/monty/pull/544
• migrate from ava to vitest by @davidhewitt in https://github.com/pydantic/monty/pull/548
• use web workers for browser wasm by @davidhewitt in https://github.com/pydantic/monty/pull/525
• remove cargo config by @davidhewitt in https://github.com/pydantic/monty/pull/546
• Monty-proto moves by @samuelcolvin in https://github.com/pydantic/monty/pull/549
• JSON error data, and type conversion to cpython by @samuelcolvin in https://github.com/pydantic/monty/pull/552
• Prep for 0.0.19-beta.3 by @samuelcolvin in https://github.com/pydantic/monty/pull/555
• monty-wasm-runtime publish false, prep 0.0.19-beta.4 by @samuelcolvin in https://github.com/pydantic/monty/pull/559
• clean up js packaging / smoke test by @davidhewitt in https://github.com/pydantic/monty/pull/550
• build and release the monty-cpython container by @samuelcolvin in https://github.com/pydantic/monty/pull/563
• remove mod eq optimization by @davidhewitt in https://github.com/pydantic/monty/pull/565
• Add pytest-style assert failure messages by @samuelcolvin in https://github.com/pydantic/monty/pull/556
• remove monty-cpython by @samuelcolvin in https://github.com/pydantic/monty/pull/571
• improve error messages from suspensions in evaluate_function by @davidhewitt in https://github.com/pydantic/monty/pull/573
• inline clone_immediate into clone_with_heap by @davidhewitt in https://github.com/pydantic/monty/pull/578
• Make an existing iterator self-iterable by @rewitt94 in https://github.com/pydantic/monty/pull/579
• Move mounting to the host-side and move fs to monty-fs by @samuelcolvin in https://github.com/pydantic/monty/pull/576
• Arg fixes, int(), str(), round() by @samuelcolvin in https://github.com/pydantic/monty/pull/584
• Public API fixes by @samuelcolvin in https://github.com/pydantic/monty/pull/587
• add iterator to PyTrait by @davidhewitt in https://github.com/pydantic/monty/pull/575
• Support class decorators by @rewitt94 in https://github.com/pydantic/monty/pull/582
• Implement iter(callable, sentinel) by @rewitt94 in https://github.com/pydantic/monty/pull/581
• Retain the OS-call payload in suspended state and drop OsFunctionCall::Used by @samuelcolvin in https://github.com/pydantic/monty/pull/583
• avoid collisions in id by @davidhewitt in https://github.com/pydantic/monty/pull/580
• migrate iterator callsites to py_iter by @davidhewitt in https://github.com/pydantic/monty/pull/588
• stop uninstalling workspace in make install-py by @davidhewitt in https://github.com/pydantic/monty/pull/595
• use web-time for the resource-tracker clock so max_duration works on wasm32-unknown-unknown by @Butch78 in https://github.com/pydantic/monty/pull/554
• Allow any iterable after *, not just five container types by @rewitt94 in https://github.com/pydantic/monty/pull/589
• monty-types crate by @samuelcolvin in https://github.com/pydantic/monty/pull/592
• Teach the type checker about iter/next by @rewitt94 in https://github.com/pydantic/monty/pull/596
• Bump version to 0.0.19-beta.5 by @samuelcolvin in https://github.com/pydantic/monty/pull/597
• fix npm publish by @davidhewitt in https://github.com/pydantic/monty/pull/603
• Fix leaks and panics on MontyObject conversion error paths by @samuelcolvin in https://github.com/pydantic/monty/pull/600
• release 0.0.19b6 by @davidhewitt in https://github.com/pydantic/monty/pull/604
• make dev-py install python dev deps by @davidhewitt in https://github.com/pydantic/monty/pull/606
• Cap CollectString/CollectStreams so print loops can't OOM the host by @Shaurya-Sethi in https://github.com/pydantic/monty/pull/558
• Remove ResourceError::Exception and fix check_replace_size shrinking bypass by @samuelcolvin in https://github.com/pydantic/monty/pull/610
• Remove max_allocations from resource limits by @samuelcolvin in https://github.com/pydantic/monty/pull/611
• Reject action-less open modes, fix mixed-indent traceback dedent by @samuelcolvin in https://github.com/pydantic/monty/pull/612
• use same build profile for codspeed as release by @samuelcolvin in https://github.com/pydantic/monty/pull/614
• Prep for v0.0.19 by @samuelcolvin in https://github.com/pydantic/monty/pull/616

New Contributors

• @arkuhn made their first contribution in https://github.com/pydantic/monty/pull/485
• @tontinton made their first contribution in https://github.com/pydantic/monty/pull/493
• @strawgate made their first contribution in https://github.com/pydantic/monty/pull/502
• @rewitt94 made their first contribution in https://github.com/pydantic/monty/pull/579
• @Shaurya-Sethi made their first contribution in https://github.com/pydantic/monty/pull/558

Full Changelog: https://github.com/pydantic/monty/compare/v0.0.18...v0.0.19