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Title: add free-threading support by kumaraditya303 · Pull Request #877 · msgspec/msgspec · GitHub

Open Graph Title: add free-threading support by kumaraditya303 · Pull Request #877 · msgspec/msgspec

X Title: add free-threading support by kumaraditya303 · Pull Request #877 · msgspec/msgspec

Description: A fast serialization and validation library, with builtin support for JSON, MessagePack, YAML, and TOML - add free-threading support by kumaraditya303 · Pull Request #877 · msgspec/msgspec

Open Graph Description: This PR fixes the thread safety issues in msgspec implementation and add free-threading support as well as making it compatible with 3.14. Python 3.13t support is omitted as it is experimental and ...

X Description: This PR fixes the thread safety issues in msgspec implementation and add free-threading support as well as making it compatible with 3.14. Python 3.13t support is omitted as it is experimental and ...

Opengraph URL: https://github.com/msgspec/msgspec/pull/877

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og:image:altThis PR fixes the thread safety issues in msgspec implementation and add free-threading support as well as making it compatible with 3.14. Python 3.13t support is omitted as it is experimental and ...
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add free-threading support https://github.com/msgspec/msgspec/pull/877#top
ofekhttps://github.com/ofek
msgspec:mainhttps://github.com/msgspec/msgspec/tree/main
kumaraditya303:thread-safehttps://github.com/kumaraditya303/msgspec/tree/thread-safe
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Oct 14, 2025https://github.com/msgspec/msgspec/pull/877#issue-3514383535
Please reload this pagehttps://github.com/msgspec/msgspec/pull/877
#852https://github.com/msgspec/msgspec/pull/852
#878https://github.com/msgspec/msgspec/issues/878
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September 12, 2025 23:37https://github.com/msgspec/msgspec/pull/877#commits-pushed-478f1ef
https://github.com/kumaraditya303
initial thread safety fixeshttps://github.com/msgspec/msgspec/pull/877/commits/478f1efbb9009bf3134d9189a779210ad4ab3326
478f1efhttps://github.com/msgspec/msgspec/pull/877/commits/478f1efbb9009bf3134d9189a779210ad4ab3326
https://github.com/JelleZijlstra
https://github.com/kumaraditya303
Fix annotations support on 3.14https://github.com/msgspec/msgspec/pull/877/commits/a7f4bc458e31a738f5ed62cfece18652b2e8fd4b
a7f4bc4https://github.com/msgspec/msgspec/pull/877/commits/a7f4bc458e31a738f5ed62cfece18652b2e8fd4b
msgspec#810https://github.com/msgspec/msgspec/pull/810
msgspec#651https://github.com/msgspec/msgspec/issues/651
msgspec#795https://github.com/msgspec/msgspec/issues/795
https://github.com/kumaraditya303
more thread safety fixeshttps://github.com/msgspec/msgspec/pull/877/commits/776c2a166996c8d8a5e899a7c395c824ba8134d8
776c2a1https://github.com/msgspec/msgspec/pull/877/commits/776c2a166996c8d8a5e899a7c395c824ba8134d8
https://github.com/kumaraditya303
fmthttps://github.com/msgspec/msgspec/pull/877/commits/81dc696ed1adb42076cba4e013782e0b4d0699ae
81dc696https://github.com/msgspec/msgspec/pull/877/commits/81dc696ed1adb42076cba4e013782e0b4d0699ae
https://github.com/kumaraditya303
use pyeventhttps://github.com/msgspec/msgspec/pull/877/commits/d239f4ab4c030c551207f0dad7ea71859859fe20
d239f4ahttps://github.com/msgspec/msgspec/pull/877/commits/d239f4ab4c030c551207f0dad7ea71859859fe20
https://github.com/kumaraditya303
use atomicshttps://github.com/msgspec/msgspec/pull/877/commits/d302d39ff532388e0e559327d39259f029c1e2af
d302d39https://github.com/msgspec/msgspec/pull/877/commits/d302d39ff532388e0e559327d39259f029c1e2af
https://github.com/kumaraditya303
add atomic specifierhttps://github.com/msgspec/msgspec/pull/877/commits/0a3fad8db15c14f534be65ac96c79546d4c53c22
0a3fad8https://github.com/msgspec/msgspec/pull/877/commits/0a3fad8db15c14f534be65ac96c79546d4c53c22
https://github.com/kumaraditya303
test fixeshttps://github.com/msgspec/msgspec/pull/877/commits/bf7c3bff1b3bfa44b8ee2aaef54a9ce56f943d64
bf7c3bfhttps://github.com/msgspec/msgspec/pull/877/commits/bf7c3bff1b3bfa44b8ee2aaef54a9ce56f943d64
https://github.com/kumaraditya303
fmthttps://github.com/msgspec/msgspec/pull/877/commits/4f195f489ed98da1ad18654dda283060e750aef7
4f195f4https://github.com/msgspec/msgspec/pull/877/commits/4f195f489ed98da1ad18654dda283060e750aef7
https://github.com/kumaraditya303
final thread safety changeshttps://github.com/msgspec/msgspec/pull/877/commits/51598fd1971ca56933e1471f83dda5fe8b94bcea
51598fdhttps://github.com/msgspec/msgspec/pull/877/commits/51598fd1971ca56933e1471f83dda5fe8b94bcea
https://github.com/kumaraditya303
kumaraditya303https://github.com/kumaraditya303
Oct 14, 2025 https://github.com/msgspec/msgspec/pull/877#ref-pullrequest-3091619282
Fix annotations support on 3.14 #852 https://github.com/msgspec/msgspec/pull/852
https://github.com/sobolevn
sobolevnhttps://github.com/sobolevn
Oct 16, 2025 https://github.com/msgspec/msgspec/pull/877#ref-issue-3496279842
Add another maintainer? #875 https://github.com/msgspec/msgspec/issues/875
Support for Python 3.13 freethreading #744 https://github.com/msgspec/msgspec/issues/744
msgspec not installed in python 3.14t (free-thread version) #878 https://github.com/msgspec/msgspec/issues/878
kumaraditya303https://github.com/kumaraditya303
October 20, 2025 09:26https://github.com/msgspec/msgspec/pull/877#commits-pushed-5a7e7e3
https://github.com/kumaraditya303
Merge remote-tracking branch 'upstream/main' into thread-safehttps://github.com/msgspec/msgspec/pull/877/commits/5a7e7e38bb7802f784e89fa0e4489ef07e8b260e
5a7e7e3https://github.com/msgspec/msgspec/pull/877/commits/5a7e7e38bb7802f784e89fa0e4489ef07e8b260e
https://github.com/kumaraditya303
fix mergehttps://github.com/msgspec/msgspec/pull/877/commits/e6bef684d4350f4e49b622436a8f9c3937d58013
e6bef68https://github.com/msgspec/msgspec/pull/877/commits/e6bef684d4350f4e49b622436a8f9c3937d58013
https://github.com/kumaraditya303
fix msvchttps://github.com/msgspec/msgspec/pull/877/commits/2554635906948647c7d76dae024fe22a65ab3432
2554635https://github.com/msgspec/msgspec/pull/877/commits/2554635906948647c7d76dae024fe22a65ab3432
https://github.com/kumaraditya303
fmthttps://github.com/msgspec/msgspec/pull/877/commits/43c7fbfa3b213736fb78189020f45f17d171b178
43c7fbfhttps://github.com/msgspec/msgspec/pull/877/commits/43c7fbfa3b213736fb78189020f45f17d171b178
https://github.com/kumaraditya303
fix build on 3.11https://github.com/msgspec/msgspec/pull/877/commits/0f82709c3b0cf1e1d62ceec2c0202c0e78674334
0f82709https://github.com/msgspec/msgspec/pull/877/commits/0f82709c3b0cf1e1d62ceec2c0202c0e78674334
https://github.com/kumaraditya303
fix gcc not supporting empty labelshttps://github.com/msgspec/msgspec/pull/877/commits/9fafd82b6d3c796d72d2be4b7e52c4fc5206399d
9fafd82https://github.com/msgspec/msgspec/pull/877/commits/9fafd82b6d3c796d72d2be4b7e52c4fc5206399d
https://github.com/kumaraditya303
Merge remote-tracking branch 'upstream/main' into thread-safehttps://github.com/msgspec/msgspec/pull/877/commits/bd429cbecfd677276b01a7a98a347bddb0882818
bd429cbhttps://github.com/msgspec/msgspec/pull/877/commits/bd429cbecfd677276b01a7a98a347bddb0882818
https://github.com/kumaraditya303
kumaraditya303https://github.com/kumaraditya303
Oct 20, 2025https://github.com/msgspec/msgspec/pull/877#issuecomment-3420554376
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#888https://github.com/msgspec/msgspec/pull/888
Please reload this pagehttps://github.com/msgspec/msgspec/pull/877
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Oct 20, 2025https://github.com/msgspec/msgspec/pull/877#issuecomment-3420559415
Please reload this pagehttps://github.com/msgspec/msgspec/pull/877
kumaraditya303https://github.com/kumaraditya303
October 20, 2025 10:27https://github.com/msgspec/msgspec/pull/877#commits-pushed-e6b0d8a
https://github.com/kumaraditya303
Merge remote-tracking branch 'upstream/main' into thread-safehttps://github.com/msgspec/msgspec/pull/877/commits/e6b0d8a7f33ec9b80b22983ffa14ec73d601d198
e6b0d8ahttps://github.com/msgspec/msgspec/pull/877/commits/e6b0d8a7f33ec9b80b22983ffa14ec73d601d198
https://github.com/kumaraditya303
add 3.14t CIhttps://github.com/msgspec/msgspec/pull/877/commits/746c159bb25ede0d93bf86330edf8ddcc555d48b
746c159https://github.com/msgspec/msgspec/pull/877/commits/746c159bb25ede0d93bf86330edf8ddcc555d48b
https://github.com/kumaraditya303
kumaraditya303https://github.com/kumaraditya303
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456f10dhttps://github.com/msgspec/msgspec/commit/456f10d45a415bdcc0e66e7f655c382548c141af
746c159https://github.com/msgspec/msgspec/commit/746c159bb25ede0d93bf86330edf8ddcc555d48b
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October 20, 2025 04:59https://github.com/msgspec/msgspec/pull/877#event-20371756814
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Oct 20, 2025https://github.com/msgspec/msgspec/pull/877#issuecomment-3420567109
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Please reload this pagehttps://github.com/msgspec/msgspec/pull/877
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Oct 20, 2025 https://github.com/msgspec/msgspec/pull/877#pullrequestreview-3356408980
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https://github.com/manzt
manzthttps://github.com/manzt
Oct 21, 2025 https://github.com/msgspec/msgspec/pull/877#ref-issue-3537604132
Extension's server fails to start if Python 3.14t is installed marimo-team/marimo-lsp#155 https://github.com/marimo-team/marimo-lsp/issues/155
manzthttps://github.com/manzt
Nov 14, 2025 https://github.com/msgspec/msgspec/pull/877#ref-commit-651bbad
https://github.com/kumaraditya303
https://github.com/JelleZijlstra
https://github.com/manzt
add free-threading support (https://github.com/marimo-team/msgspec/commit/651bbad60ef5269eb234b303a7726541f085b6d0
msgspec#877https://github.com/msgspec/msgspec/pull/877
)https://github.com/marimo-team/msgspec/commit/651bbad60ef5269eb234b303a7726541f085b6d0
651bbadhttps://github.com/marimo-team/msgspec/commit/651bbad60ef5269eb234b303a7726541f085b6d0
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Nov 14, 2025 https://github.com/msgspec/msgspec/pull/877#ref-pullrequest-3626631433
Cherry-pick Python 3.14 support and free-threading from upstream marimo-team/msgspec#8 https://github.com/marimo-team/msgspec/pull/8
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Nov 14, 2025 https://github.com/msgspec/msgspec/pull/877#ref-commit-2ecf9bf
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Cherry-pick Python 3.14 support and free-threading from upstream (https://github.com/marimo-team/msgspec/commit/2ecf9bf8272294637b187674976bd90473560642
#8https://github.com/marimo-team/msgspec/pull/8
)https://github.com/marimo-team/msgspec/commit/2ecf9bf8272294637b187674976bd90473560642
2ecf9bfhttps://github.com/marimo-team/msgspec/commit/2ecf9bf8272294637b187674976bd90473560642
msgspec#853https://github.com/msgspec/msgspec/pull/853
msgspec#852https://github.com/msgspec/msgspec/pull/852
msgspec#854https://github.com/msgspec/msgspec/pull/854
msgspec#888https://github.com/msgspec/msgspec/pull/888
msgspec#877https://github.com/msgspec/msgspec/pull/877
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https://github.com/msgspec/msgspec/pull/877/files/746c159bb25ede0d93bf86330edf8ddcc555d48b
msgspec not installed in python 3.14t (free-thread version) https://github.com/msgspec/msgspec/issues/878
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