v1.2.0

agentset-ai/agentsetv1.2.0Oct 18, 2026by samuelcolvin

Upgrading?

Full Release Notes

## What's Changed
* Cap float format precision at `INT_MAX - 1024` like CPython 3.14.8 by @samuelcolvin in https://github.com/pydantic/monty/pull/1002
* Implement `hashlib` by @samuelcolvin in https://github.com/pydantic/monty/pull/988
* fix(monty-js): publish the component facade declaration in dist by @Yi-111-a in https://github.com/pydantic/monty/pull/1008
* fix-pr-comments: include maintainer threads, be sceptical of bots by @samuelcolvin in https://github.com/pydantic/monty/pull/1012
* Implement `os.path` by @samuelcolvin in https://github.com/pydantic/monty/pull/1000
* Add a docs column to the branch diff and fix misclassified files by @samuelcolvin in https://github.com/pydantic/monty/pull/1017
* Support dataclasses `field()`, `default_factory` and `__post_init__` by @rewitt94 in https://github.com/pydantic/monty/pull/835
* Load `pydantic_monty._binary` eagerly at package import by @cpruijsen in https://github.com/pydantic/monty/pull/992
* Honour `open()`'s `newline` argument and make file objects iterable by @samuelcolvin in https://github.com/pydantic/monty/pull/1001
* Import host call by @samuelcolvin in https://github.com/pydantic/monty/pull/942
* Host module fixes: duplicate attr names, assignment docs, module hashing by @samuelcolvin in https://github.com/pydantic/monty/pull/1021
* fix(monty): compile the JSON string cache on the declared 1.96 MSRV by @Yi-111-a in https://github.com/pydantic/monty/pull/1013
* Fix JavaScript print callbacks swallowing thrown null by @GoldArowana in https://github.com/pydantic/monty/pull/1028
* Optimisation: Direct sequence unpacking by @jaheba in https://github.com/pydantic/monty/pull/1015
* Extract a `PyHashTable` shared by dict and set by @rewitt94 in https://github.com/pydantic/monty/pull/884
* Binascii and base64 resource limits checks by @rewitt94 in https://github.com/pydantic/monty/pull/842
* Bump `samuelcolvin/check-python-version` action to v5.1 by @Viicos in https://github.com/pydantic/monty/pull/997
* Harden CI by @Viicos in https://github.com/pydantic/monty/pull/1010
* Cap restored session budgets at destination limits by @rewitt94 in https://github.com/pydantic/monty/pull/1027
* Support list slice assignment by @jaheba in https://github.com/pydantic/monty/pull/1031
* `Path.scan` os call by @samuelcolvin in https://github.com/pydantic/monty/pull/987
* Bump dtolnay/rust-toolchain from efa25f7f19611383d5b0ccf2d1c8914531636bf9 to e2a55d2ffb04f378e9626c28d38b36d230d1e12f by @dependabot[bot] in https://github.com/pydantic/monty/pull/1034
* Fix contracts of `pathlib.Path` and `os` fs actions by @jaheba in https://github.com/pydantic/monty/pull/999
* Support ordering comparisons for set and frozenset by @jaheba in https://github.com/pydantic/monty/pull/1040
* Add `bisect` module by @jaheba in https://github.com/pydantic/monty/pull/1047
* Run CodSpeed benchmarks on macro runners in walltime mode by @samuelcolvin in https://github.com/pydantic/monty/pull/1044
* Extract Python benchmark scripts into separate files by @jaheba in https://github.com/pydantic/monty/pull/1055
* Enable CodSpeed memory mode for benchmarks by @jaheba in https://github.com/pydantic/monty/pull/1054
* Optimize f-string concatenation buffer preallocation and refcount churn by @gabrielhsc95 in https://github.com/pydantic/monty/pull/1052
* Implement the `csv` module by @samuelcolvin in https://github.com/pydantic/monty/pull/1018
* Remove redundant interpreter benchmarks by @samuelcolvin in https://github.com/pydantic/monty/pull/1056
* Disable ASLR for the CodSpeed bench run by @samuelcolvin in https://github.com/pydantic/monty/pull/1062
* optimize ci by @davidhewitt in https://github.com/pydantic/monty/pull/1064
* Match statements by @samuelcolvin in https://github.com/pydantic/monty/pull/1016
* Pin glibc malloc thresholds for walltime benchmarks by @codspeed[bot] in https://github.com/pydantic/monty/pull/1059
* make many more dunders supported on user instances by @davidhewitt in https://github.com/pydantic/monty/pull/1058
* Include capture groups in `re.split()` results by @Likheet in https://github.com/pydantic/monty/pull/1036
* Register interpreter benchmarks from the python/ directory by @samuelcolvin in https://github.com/pydantic/monty/pull/1057
* Fix match statement review findings by @samuelcolvin in https://github.com/pydantic/monty/pull/1069
* Add `pyperformance` benchmarks by @jaheba in https://github.com/pydantic/monty/pull/996
* `json.load` and `json.dump` by @samuelcolvin in https://github.com/pydantic/monty/pull/1023
* implement `tomllib` by @samuelcolvin in https://github.com/pydantic/monty/pull/1022
* v1.2.0 release prep by @samuelcolvin in https://github.com/pydantic/monty/pull/1073

## New Contributors
* @cpruijsen made their first contribution in https://github.com/pydantic/monty/pull/992
* @GoldArowana made their first contribution in https://github.com/pydantic/monty/pull/1028
* @dependabot[bot] made their first contribution in https://github.com/pydantic/monty/pull/1034
* @gabrielhsc95 made their first contribution in https://github.com/pydantic/monty/pull/1052
* @Likheet made their first contribution in https://github.com/pydantic/monty/pull/1036

**Full Changelog**: https://github.com/pydantic/monty/compare/v1.1.0...v1.2.0

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