Add Python 3.14 support

[emlowe]

Add python 3.14 support.

Current status: Runs fine - ready for review

Draft For:

• working
• Build Wheels update Add 3.14 and update zstd build-wheels#81
• Chiapos Add python 3.14 chiapos#504 (2.0.12)
• Update blockchain for Chiapos build(deps): bump chiapos from 2.0.11 to 2.0.12 #20246
• chia_rs Python 3.14 chia_rs#1301
• Update blockchain for chia_rs bump chia_rs and update uses of RewardChainBlock and SubEpochSummary #20304
• chiavdf Add Python 3.14 chiavdf#275 (1.1.14)
• update blockchain for chiavdf build(deps): bump chiavdf from 1.1.13 to 1.1.14 #20245
• chiabip158 Add python 3.14 chiabip158#62 (1.5.4)
• update blockchain for chiabip158 build(deps): bump chiabip158 from 1.5.3 to 1.5.4 #20247
• bitarray 3.8.0 (435842e)
• markupsafe 3.0.3 (9d59ff4)
• zstd (CNI wheel for 1.5.7.2: Add 3.14 and update zstd build-wheels#81) (8723372)
• miniupnp (CNI wheel for 2.3.3: Add 3.14 and update zstd build-wheels#81)
• test against 3.14 Add 3.14 actions#243
• Binary watchdog for macos+3.14 Missing macOS python 3.14 binary wheels on pypi gorakhargosh/watchdog#1143
• Fixes to test_long_sync_untrusted_break #20327
• async is_empty() not awaited #20328
• context manager for BlockTools #20326
• Convert to use rpcclient context to ensure proper teardown cleanup #20329
• fix problems with test_limits_connections (pytest -s -n0 -k test_limits_connections) (fbc2664)

---

Note

Medium Risk
Mostly compatibility and test/cleanup changes, but it touches event loop policy selection and a few shutdown/sync paths (ChiaPolicy, timelord, node discovery) that could affect runtime behavior under load or during shutdown.

Overview
Adds Python 3.14 support by expanding CI matrices (pre-commit/tests/wheel checks/mypy) and updating install.sh/Install.ps1 to prefer/allow 3.14.

Improves asyncio/transport compatibility for 3.14 by updating ChiaPolicy to use the new base policy class, and adjusts tests for changed error messages and deprecation warnings.

Hardens resource management and shutdown behavior: closes aiohttp sessions/websockets and RPC clients more consistently, adds a safer timelord VDF client shutdown sequence, waits for node-discovery tasks to finish on close, fixes temp file handling, and adds Windows-safe temp directory cleanup retries.

^{Reviewed by Cursor Bugbot for commit 45b7cb6. Bugbot is set up for automated code reviews on this repo. Configure here.}

[coveralls-official]

Coverage Report for CI Build 25567115061

Warning

Build has drifted: This PR's base is out of sync with its target branch, so coverage data may include unrelated changes.
Quick fix: rebase this PR. Learn more →

Coverage decreased (-0.09%) to 91.252%

Details

• Coverage decreased (-0.09%) from the base build.
• Patch coverage: 11 uncovered changes across 3 files (185 of 196 lines covered, 94.39%).
• 107 coverage regressions across 29 files.

Uncovered Changes

File	Changed	Covered	%
chia/server/chia_policy.py	13	7	53.85%
chia/_tests/util/full_sync.py	14	10	71.43%
chia/_tests/util/test_replace_str_to_bytes.py	5	4	80.0%

Coverage Regressions

107 previously-covered lines in 29 files lost coverage.

Top 10 Files by Coverage Loss	Lines Losing Coverage	Coverage
chia/_tests/core/util/test_lockfile.py	22	77.42%
chia/timelord/timelord.py	16	73.04%
chia/wallet/wallet_node.py	10	86.87%
chia/daemon/server.py	7	80.62%
chia/server/ws_connection.py	7	92.01%
chia/_tests/core/server/test_event_loop.py	6	89.74%
chia/data_layer/data_layer.py	4	85.68%
chia/server/server.py	4	84.67%
chia/full_node/full_node.py	3	87.68%
chia/data_layer/data_store.py	2	95.55%

---

Coverage Stats

Relevant Lines:	118945
Covered Lines:	108711
Line Coverage:	91.4%
Relevant Branches:	11822
Covered Branches:	10616
Branch Coverage:	89.8%
Branches in Coverage %:	Yes
Coverage Strength:	1.83 hits per line

---

💛 - Coveralls

[socket-security]

Review the following changes in direct dependencies. Learn more about Socket for GitHub.

Diff	Package	Supply Chain Security	Vulnerability	Quality	Maintenance	License
	pypi/​certifi@​2024.7.4 ⏵ 2026.1.4	+1
	pypi/​pycryptodome@​3.20.0 ⏵ 3.23.0
	pypi/​prompt-toolkit@​3.0.51 ⏵ 3.0.52	+1
	pypi/​distlib@​0.3.7 ⏵ 0.4.0	+1
	pypi/​bitarray@​3.0.0 ⏵ 3.8.0	+1
	pypi/​virtualenv@​20.26.6 ⏵ 20.36.1	+1	+2
	pypi/​execnet@​2.1.1 ⏵ 2.1.2	+1
	pypi/​rich@​13.9.4 ⏵ 14.3.2	+1
	pypi/​nodeenv@​1.9.1 ⏵ 1.10.0	+1
	pypi/​jeepney@​0.8.0 ⏵ 0.9.0
	pypi/​altgraph@​0.17.4 ⏵ 0.17.5
	pypi/​charset-normalizer@​3.3.0 ⏵ 3.4.4
	pypi/​pydot@​3.0.4 ⏵ 4.0.1
	pypi/​pyproject-hooks@​1.0.0 ⏵ 1.2.0	+1
	pypi/​portalocker@​2.8.2 ⏵ 3.2.0	+1
	pypi/​tomli@​2.0.1 ⏵ 2.4.0
	pypi/​requests@​2.32.4 ⏵ 2.33.0	+1	+2
	pypi/​jaraco-context@​5.3.0 ⏵ 6.1.0		+16
	pypi/​python-dateutil@​2.8.2 ⏵ 2.9.0.post0	+1
	pypi/​wcwidth@​0.2.13 ⏵ 0.6.0
	pypi/​pycparser@​2.21 ⏵ 3.0	+4
	pypi/​markdown-it-py@​3.0.0 ⏵ 4.0.0	+1
	pypi/​macholib@​1.16.3 ⏵ 1.16.4
	pypi/​identify@​2.5.30 ⏵ 2.6.16	+1				+31
	pypi/​pefile@​2023.2.7 ⏵ 2024.8.26	+1
	pypi/​attrs@​23.1.0 ⏵ 25.4.0	+1
	pypi/​platformdirs@​3.11.0 ⏵ 4.5.1	+1
	pypi/​pyparsing@​3.2.3 ⏵ 3.3.2	+1
	pypi/​jaraco-functools@​4.0.1 ⏵ 4.4.0	+1
	pypi/​yarl@​1.18.3 ⏵ 1.22.0	+1
	pypi/​iniconfig@​2.0.0 ⏵ 2.3.0
	pypi/​jmespath@​1.0.1 ⏵ 1.1.0	+1
See 17 more rows in the dashboard

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[socket-security]

Warning

Review the following alerts detected in dependencies.

According to your organization's Security Policy, it is recommended to resolve "Warn" alerts. Learn more about Socket for GitHub.

Action	Severity	Alert  (click "▶" to expand/collapse)
Warn		License policy violation: pypi charset-normalizer under CC-BY-SA-3.0 License: CC-BY-SA-3.0 - The applicable license policy does not permit this license (5) (charset_normalizer-3.4.4/data/NOTICE.md) From: poetry.lock → pypi/charset-normalizer@3.4.4 ℹ Read more on: This package | This alert | What is a license policy violation? Next steps: Take a moment to review the security alert above. Review the linked package source code to understand the potential risk. Ensure the package is not malicious before proceeding. If you're unsure how to proceed, reach out to your security team or ask the Socket team for help at support@socket.dev. Suggestion: Find a package that does not violate your license policy or adjust your policy to allow this package's license. Mark the package as acceptable risk. To ignore this alert only in this pull request, reply with the comment @SocketSecurity ignore pypi/charset-normalizer@3.4.4. You can also ignore all packages with @SocketSecurity ignore-all. To ignore an alert for all future pull requests, use Socket's Dashboard to change the triage state of this alert.
Warn		Native binaries present: pypi tomli Location: Package overview From: poetry.lock → pypi/tomli@2.4.0 ℹ Read more on: This package | This alert | Why is native code a concern? Next steps: Take a moment to review the security alert above. Review the linked package source code to understand the potential risk. Ensure the package is not malicious before proceeding. If you're unsure how to proceed, reach out to your security team or ask the Socket team for help at support@socket.dev. Suggestion: Verify that the inclusion of native code is expected and necessary for this package's functionality. If it is unnecessary or unexpected, consider using alternative packages without native code to mitigate potential risks. Mark the package as acceptable risk. To ignore this alert only in this pull request, reply with the comment @SocketSecurity ignore pypi/tomli@2.4.0. You can also ignore all packages with @SocketSecurity ignore-all. To ignore an alert for all future pull requests, use Socket's Dashboard to change the triage state of this alert.

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[emlowe]

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[cursor]

Cursor Bugbot has reviewed your changes and found 1 potential issue.

There are 2 total unresolved issues (including 1 from previous review).

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[github-actions]

File	Coverage	Missing Lines
chia/_tests/util/full_sync.py	71.4%	lines 270-273
chia/_tests/util/test_replace_str_to_bytes.py	80.0%	lines 145
chia/server/chia_policy.py	53.8%	lines 354-355, 357-358, 360, 362

Total	Missing	Coverage
195 lines	11 lines	94%