chore(deps): update python to >=3.14,<3.15

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
python (source)	requires-python	minor	>=3.10,<3.14 → >=3.14,<3.15

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Release Notes

python/cpython (python)

v3.14.3

Compare Source

v3.14.2

Compare Source

v3.14.1

Compare Source

v3.14.0

Compare Source

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Configuration

📅 Schedule: Branch creation - "before 4am on monday" in timezone Europe/Berlin, Automerge - At any time (no schedule defined).

🚦 Automerge: Disabled by config. Please merge this manually once you are satisfied.

♻ Rebasing: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this PR and you won't be reminded about this update again.

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• If you want to rebase/retry this PR, check this box

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This PR was generated by Mend Renovate. View the repository job log.

[claude]

Security & Bug Review - CRITICAL ISSUES FOUND

BLOCKING ISSUE: Breaking Python Version Change

Severity: CRITICAL

This PR introduces a breaking change that drops support for all currently supported Python versions.

Current State (CLAUDE.md:187):

Requires Python 3.10-3.13 (3.14 not yet supported per pyproject.toml)

Proposed Change:

• Changes requires-python from >=3.10,<3.14 to >=3.14,<3.15
• This completely removes Python 3.10, 3.11, 3.12, and 3.13 support
• Only supports Python 3.14 which is not yet stable/released

Impact

1. All CI/CD pipelines failing - Every test job is failing because Python 3.14 is not properly supported
2. Breaks all existing users - Anyone using Python 3.10-3.13 (the entire current user base) would be unable to upgrade
3. Dependency resolution issues - uv.lock shows restrictive requires-python = "==3.14.*" causing many dependencies to be incompatible
4. Violates semantic versioning - This is a major breaking change that should require a major version bump (1.0.0) and careful migration planning

Recommendation

DO NOT MERGE this PR. Instead:

1. Wait for Python 3.14 to be officially released and stabilized
2. First add Python 3.14 support alongside existing versions: >=3.10,<3.15
3. Test thoroughly with all supported Python versions
4. Update documentation
5. Only drop older Python versions in a future major release with proper deprecation warnings

This PR should be closed or converted to add Python 3.14 support without removing existing version support.

[claude]

Security and Bug Review - PR #820

Critical Issues Found

1. Breaking Change: Python Version Compatibility 🔴

This PR changes requires-python from >=3.10,<3.14 to >=3.14,<3.15, which is a major breaking change that:

• Drops support for Python 3.10, 3.11, 3.12, and 3.13
• Forces all users to upgrade to Python 3.14 (which may not even be released yet)
• Contradicts the CLAUDE.md documentation stating 'Requires Python 3.10-3.13 (3.14 not yet supported)'
• Breaks existing deployments and downstream dependencies

2. Metadata Inconsistency 🟡

pyproject.toml lines 18-21 still declare support for Python 3.10-3.13 in classifiers. These classifiers now contradict the requires-python field, which will mislead users and package indexes.

3. Configuration Mismatch 🟡

Line 146: target-version = "py310" in ruff configuration is now invalid since the package requires Python 3.14+. This should be updated to "py314" if the version bump is intentional.

4. Test Matrix Failure 🔴

All CI checks are failing because the test matrix still attempts to run tests on Python 3.10, 3.11, 3.12, and 3.13, but uv.lock now enforces requires-python = "==3.14.*", preventing installation on these versions.

Recommendation

This PR should NOT be merged as-is. It appears to be a premature Renovate bot update. Python 3.14 is not yet stable, and this change breaks backward compatibility without justification.

Suggested action:

• Close this PR
• Update Renovate configuration to cap Python version at <3.14 until Python 3.14 is released and tested
• When intentionally adding Python 3.14 support, it should be >=3.10,<3.15 (additive), not >=3.14,<3.15 (breaking)

[claude]

Security & Bug Review

Critical Issue: Breaking Change - Python Version Constraint

Severity: High

The PR changes requires-python from >=3.10,<3.14 to >=3.14,<3.15, which:

1. Breaks CI/CD Pipeline: All tests are failing because the CI is configured to test Python 3.10-3.13, but the lockfile now requires exactly Python 3.14:

   • Error: The requested interpreter resolved to Python 3.X.X, which is incompatible with the project's Python requirement: ==3.14.*

2. Inconsistent Metadata: The pyproject.toml classifiers still list Python 3.10-3.13 (lines 18-21) but the project now requires Python 3.14+. This is misleading to users.

3. Breaking Change for Users: This will break all existing users on Python 3.10-3.13, despite Python 3.14 not being officially released yet (as of November 2025). According to the project docs, Python 3.14 is explicitly "not yet supported."

4. Premature Adoption: Python 3.14 is still in development. The uv.lock file constraint requires-python = "==3.14.*" means the project will ONLY work with Python 3.14.x, breaking compatibility with all stable Python versions.

Recommendation

Do not merge this PR. This appears to be an overeager Renovate bot update that should be rejected. The project should:

1. Continue supporting Python 3.10-3.13 as documented
2. Only adopt Python 3.14 after it's officially released and tested
3. When Python 3.14 support is added, use >=3.10,<3.15 (not >=3.14) to maintain backward compatibility

No Other Security Issues Found

No other security vulnerabilities or critical bugs detected in the dependency updates themselves (uv.lock changes).

[claude]

Security & Bug Review

CRITICAL ISSUES - DO NOT MERGE

Breaking Changes

1. Python 3.14 Not Released (pyproject.toml:6)

   • Changes requires-python to >=3.14,<3.15
   • Python 3.14 is currently in pre-alpha development (not stable)
   • Breaks all existing users on Python 3.10-3.13
   • Library becomes immediately unusable in production

2. Metadata Inconsistency (pyproject.toml:18-21)

   • Classifiers still claim Python 3.10-3.13 support
   • Contradicts requires-python constraint
   • Will mislead PyPI users about compatibility

3. Tool Configuration Mismatch (pyproject.toml:170)

   • Ruff target-version = "py310" incompatible with Python 3.14 requirement
   • May allow/block incorrect syntax

CI/CD Failures

All quality gates failing:

• ❌ Tests (all Python versions, all platforms)
• ❌ Pre-commit checks
• ❌ Type checking (mypy)
• ❌ Documentation build
• ❌ Runtime type validation (typeguard)
• ❌ Doctest validation (xdoctest)

Recommendation

Close this PR. Python 3.14 won't be stable until October 2025. The project currently supports Python 3.10-3.13 per CLAUDE.md. Wait for:

1. Python 3.14 stable release
2. CI infrastructure supporting 3.14
3. Dependency ecosystem compatibility

[claude]

Security & Bug Review

I have reviewed PR #820 and found critical bugs that will break the project:

Critical Issues:

1. Python 3.14 Not Yet Released

• Changes requires-python to >=3.14,<3.15, but Python 3.14 is still in alpha/pre-release
• Project will be uninstallable until Python 3.14 official release

2. Dependency Constraint Conflict

• uv.lock forces requires-python = "==3.14.*" (exact version)
• pyproject.toml specifies requires-python = ">=3.14,<3.15" (range)
• Mismatched constraints will cause installation failures

3. Missing Dependency Markers

• Removes Python version-specific dependencies (exceptiongroup, typing-extensions)
• anyio requires these on older Python versions, causing runtime errors

4. Classifier/Version Mismatch

• Lines 18-21 in pyproject.toml still declare Python 3.10-3.13 support
• Creates contradiction: requires 3.14+ but claims to support 3.10-3.13

5. All CI Checks Failed

• 30/30 CI checks failed: pre-commit, mypy, tests, typeguard, xdoctest, docs-build
• Confirms the breaking changes prevent builds/tests

6. Violates Project Documentation

• CLAUDE.md line 122 states: "Requires Python 3.10-3.13 (3.14 not yet supported)"

Recommendation:

Do not merge until Python 3.14 reaches stable release and:

• All dependencies are tested for 3.14 compatibility
• CI/CD infrastructure updated to support 3.14
• Version classifiers updated to include 3.14
• CLAUDE.md documentation updated

Python 3.14 support is premature at this stage.

[claude]

Security and Bug Review

I've identified critical bugs in this PR that are blocking all tests:

🐛 Critical Bug: Python Version Incompatibility

Location: pyproject.toml:6

Issue: The PR changes requires-python from >=3.10,<3.14 to >=3.14,<3.15, but this creates a severe incompatibility:

1. Python 3.14 is not officially released yet (as of November 2024)
2. The lock file now requires exactly Python 3.14: requires-python = "==3.14.*"
3. All CI/CD tests are failing with error: The requested interpreter resolved to Python 3.13.9, which is incompatible with the project's Python requirement: ==3.14.*
4. The project metadata still claims support for Python 3.10-3.13 (classifiers on lines 18-21)

Root Cause: The Renovate bot incorrectly interpreted the requirement and bumped to Python 3.14, which doesn't exist in stable releases yet.

Impact:

• ❌ All 28 CI/CD checks are failing
• ❌ Project cannot be installed on any current Python version
• ❌ Breaks all existing users and deployments
• ❌ Documentation, tests, type checking, and builds all fail

According to CLAUDE.md: This violates the pre-push requirement that states "you MUST run the full test suite" and "DO NOT push if uv run nox reports ANY failures."

Recommendation

REJECT this PR. The correct approach is:

• Keep requires-python = ">=3.10,<3.14" until Python 3.14 is officially released and stable
• Add Python 3.14 support in a separate PR after it's released
• Update all classifiers and test matrices simultaneously

No security vulnerabilities detected, but the breaking change makes this PR unsuitable for merging.

[claude]

Security & Bug Review

Critical Issue: Breaking Change - Python Version Incompatibility

This PR updates requires-python from >=3.10,<3.14 to >=3.14,<3.15, which causes severe issues:

1. Drops support for Python 3.10-3.13 - This is a breaking change that makes the library unusable for all existing users on Python 3.10, 3.11, 3.12, and 3.13.

2. Contradicts project documentation - The CLAUDE.md file explicitly states: "Requires Python 3.10-3.13 (3.14 not yet supported per pyproject.toml)", and the current pyproject.toml classifiers (lines 18-21) still list Python 3.10-3.13 as supported versions.

3. Python 3.14 is not released yet - Python 3.14 is still in development (not officially released as of December 2025). This makes the library immediately unusable since the required Python version does not exist in stable form.

4. All CI/CD checks are failing - Every test suite is failing because the Python version constraint cannot be satisfied.

Recommendation: This PR should be rejected. The project is not ready to migrate to Python 3.14-only. A proper migration would require:

• Updating all classifiers in pyproject.toml
• Updating documentation (CLAUDE.md, README)
• Ensuring Python 3.14 is officially released and stable
• Testing all dependencies for 3.14 compatibility
• Communicating the breaking change to users

[claude]

Security and Bug Review

🚨 CRITICAL ISSUE: Incompatible Python Version Requirement

This PR changes the Python requirement from >=3.10,<3.14 to >=3.14,<3.15, which introduces several critical problems:

Bugs:

1. Breaking change for all users: Drops support for Python 3.10-3.13, breaking existing installations
2. CI infrastructure incompatibility: All test suites are failing (mypy, tests, docs-build, pre-commit, typeguard, xdoctest) - the project infrastructure doesn't support Python 3.14
3. Documentation conflict: CLAUDE.md explicitly states "Requires Python 3.10-3.13 (3.14 not yet supported per pyproject.toml)"
4. Overly restrictive lockfile: uv.lock changed to requires-python = "==3.14.*" instead of a range like >=3.14,<3.15

Dependency Issues:

• backports-datetime-fromisoformat removed entirely (1660+ lines of changes in lockfile)
• exceptiongroup removed (needed for exception handling backports)
• typing-extensions markers removed (needed for typing backports)
• coverage[toml] extra removed - may affect test coverage functionality

Security Concern:
Python 3.14 is currently in alpha/beta phase (Dec 2025). Using pre-release Python versions in production:

• May contain unpatched security vulnerabilities
• Lacks stability and security hardening of stable releases
• Not recommended for production use per Python's release guidelines

Recommendation:
This PR should not be merged until:

1. The project is ready to drop Python 3.10-3.13 support (requires user communication)
2. All CI/CD infrastructure is updated to support Python 3.14
3. Python 3.14 reaches stable release
4. Nox sessions and testing matrices are updated accordingly

Reference: CLAUDE.md Pre-Push Requirements - uv run nox must pass before merging.

[claude]

Security & Bug Review

CRITICAL ISSUES FOUND - DO NOT MERGE

🔴 Critical Bug: Inconsistent Python Version Declaration

Issue: The PR updates requires-python to >=3.14,<3.15 but leaves outdated Python version classifiers.

Location: pyproject.toml:6 vs pyproject.toml:18-21

Impact:

• Package metadata is inconsistent - declares support for Python 3.10-3.13 in classifiers but requires >=3.14
• This will confuse package managers and users about actual compatibility
• PyPI will show incorrect supported versions

Evidence:

requires-python = ">=3.14,<3.15"  # Line 6 - requires ONLY 3.14
classifiers = [
    "Programming Language :: Python :: 3.10",  # Line 18 - claims 3.10 support
    "Programming Language :: Python :: 3.11",  # Line 19 - claims 3.11 support  
    "Programming Language :: Python :: 3.12",  # Line 20 - claims 3.12 support
    "Programming Language :: Python :: 3.13",  # Line 21 - claims 3.13 support
]

🔴 Critical Bug: Ruff Target Version Mismatch

Issue: Ruff is configured to target Python 3.10 but the package now requires Python 3.14.

Location: pyproject.toml:170

Impact:

• Ruff will allow Python 3.10 syntax/features that may not be intended
• Code quality checks are not aligned with actual Python version requirements
• May miss deprecation warnings for newer Python versions

Evidence:

target-version = "py310"  # Should be "py314"

⚠️ Major Breaking Change Warning

Issue: This PR drops support for Python 3.10, 3.11, 3.12, and 3.13, requiring ONLY Python 3.14.

Impact:

• Breaking change for all users on Python 3.10-3.13
• Python 3.14 is not yet released (current is 3.13)
• According to CLAUDE.md, the project explicitly states: "Requires Python 3.10-3.13 (3.14 not yet supported per pyproject.toml)"
• All CI checks are failing because Python 3.14 does not exist yet

🚨 CI Failures

Status: All test jobs are failing (30/30 checks failed)

Root Cause: The update requires Python 3.14 which does not exist. The CI is attempting to run tests on Python 3.10-3.13, which now fail the version check.

Recommendation

DO NOT MERGE this PR. The change appears to be a Renovate bot error. This should likely be updating to >=3.10,<3.15 (adding 3.14 support) rather than >=3.14,<3.15 (dropping all current versions).

If Python 3.14-only support is intentional, the following must be updated:

1. Update classifiers to only list Python 3.14
2. Update ruff target-version to py314
3. Update CLAUDE.md documentation
4. Update CI configuration to test Python 3.14 (when it becomes available)
5. Communicate breaking change to users

---

Review performed by Claude Code

[claude]

Security & Bug Review

Status: ❌ CRITICAL ISSUES FOUND - DO NOT MERGE

Critical Bugs

1. Breaking Version Compatibility (pyproject.toml:6)

   • Changes requires-python from >=3.10,<3.14 to >=3.14,<3.15
   • Drops support for Python 3.10, 3.11, 3.12, and 3.13 - breaking change for all existing users
   • Python 3.14 is not yet officially released (still in beta/rc as of Dec 2025)
   • Contradicts CLAUDE.md which states "Requires Python 3.10-3.13 (3.14 not yet supported)"

2. Metadata Inconsistency (pyproject.toml:18-21)

   • Classifiers still declare support for Python 3.10-3.13
   • Creates contradictory package metadata (claims support but blocks installation)

3. Configuration Mismatch (pyproject.toml:170)

   • Ruff target-version = "py310" inconsistent with requiring Python 3.14+

4. Test Suite Failure

   • All 30 CI/CD test jobs failing
   • Breaks entire build and test pipeline

Recommendation

REJECT this PR. This appears to be an incorrectly configured Renovate bot update attempting to upgrade to an unreleased Python version while dropping all currently supported versions.

Correct approach:

1. Keep current requires-python = ">=3.10,<3.14"
2. Wait for Python 3.14 stable release
3. Add 3.14 support without removing 3.10-3.13 support
4. Update classifiers and target-version accordingly

---

Automated review by Claude Code

[claude]

Security and Bug Review

Critical Issue: Breaking Change - Python Version Incompatibility

Severity: HIGH

This PR introduces a breaking change that makes the library incompatible with its documented and advertised Python version support.

The Problem

The PR changes requires-python from >=3.10,<3.14 to >=3.14,<3.15, which:

1. Drops support for Python 3.10-3.13 - documented as currently supported in CLAUDE.md line 98
2. Locks to Python 3.14 only (==3.14.* in uv.lock) - Python 3.14 is not yet officially released as stable
3. Breaks all CI/CD tests - All test jobs fail because they run on Python 3.10-3.13
4. Inconsistent metadata - pyproject.toml classifiers still list Python 3.10-3.13 support (lines 18-21) but requires-python excludes them

Evidence

All CI jobs fail with: error: The requested interpreter resolved to Python 3.13.11, which is incompatible with the project's Python requirement: ==3.14.* (from project.requires-python)

Impact

• Breaking change for all existing users on Python 3.10-3.13
• Violates semantic versioning - should require a major version bump
• Contradicts project documentation stating Python 3.10-3.13 are supported
• Makes library unusable until Python 3.14 becomes stable

Recommendation

DO NOT MERGE this PR. This appears to be an overly aggressive Renovate bot update that should be either rejected entirely OR modified to gradually add Python 3.14 support while maintaining 3.10-3.13 compatibility (change to >=3.10,<3.15). According to CLAUDE.md, the project requires Python 3.10-3.13, and Python 3.14 is explicitly marked as not yet supported.