Drop support for Python 3.9 and 3.10

.github/workflows/linting.yaml

@@ -64,8 +64,6 @@ jobs:
                     - "3.13"
                     - "3.12"
                     - "3.11"
-                    - "3.10"
-                    - "3.9"
         steps:
 
         # repo: https://github.com/actions/checkout

.github/workflows/testing.yaml

@@ -72,8 +72,6 @@ jobs:
                     - "3.13"
                     - "3.12"
                     - "3.11"
-                    - "3.10"
-                    - "3.9"
                 include:
                     # Exercise the Windows-specific code paths at least once per run, matching the
                     # "Operating System :: Microsoft :: Windows" classifier in pyproject.toml.

.just/uv.justfile

@@ -109,15 +109,15 @@ alias uv-export := uv-export-requirements
 # set python-version in .python-version file
 [group: 'uv']
 [unix]
-uv-set-python-version version="3.10" *args:
+uv-set-python-version version="3.11" *args:
     mv .python-version .python-version.backup
     @ echo "{{version}}" > .python-version
     @ echo -e "Set python version to {{version}}"
 
 # set python-version in .python-version file
 [group: 'uv']
 [windows]
-uv-set-python-version version="3.10" *args:
+uv-set-python-version version="3.11" *args:
     #!pwsh.exe
     Move-Item .python-version .python-version.backup -Force
     Set-Content -Path .python-version -Value "{{version}}"

.pre-commit-config.yaml

@@ -23,7 +23,7 @@ default_install_hook_types: [commit-msg, pre-commit]
 default_stages: [pre-commit, manual]
 
 default_language_version:
-    python: "3.9"
+    python: "3.11"
 
 fail_fast: true
 

.python-version

@@ -1 +1 @@
-3.10
+3.11

docs/changes.md

@@ -2,6 +2,12 @@
 
 All notable changes to this project will be documented anti-chronologically in this file.
 
+## Unreleased
+
+- Drop support for Python 3.9 and 3.10 (both end-of-life); `requires-python` is now `>=3.11`.
+  Removes the 3.9-only workarounds (`tp.Optional` for cyclopts, coverage pragmas for the
+  pre-PEP 626 line table), targets ruff at `py311`, and defaults `.python-version` to 3.11.
+
 ## 0.1.1 (2026-11-03)
 
 Maintenance release: no changes to the package code or its runtime dependencies.

docs/installation.md

@@ -2,7 +2,7 @@
 
 ## Requirements
 
-- Python >= 3.9
+- Python >= 3.11
 - [uv](https://docs.astral.sh/uv/), to resolve and install the local-path overrides once
   `toggle` has enabled them
 

docs/readme.md

@@ -26,7 +26,7 @@ See [Introduction] for the full problem this solves.
 
 ## Requirements
 
-- Python >= 3.9
+- Python >= 3.11
 - [uv]
 
 ## Installation

pyproject.toml

@@ -26,7 +26,7 @@ version = "0.1.2.dev1"
 license = { file = "license.md" }
 description = "Toggle [tool.uv.sources] local path overrides in pyproject.toml on and off, and guard against committing them."
 readme = "docs/readme.md"
-requires-python = ">=3.9"
+requires-python = ">=3.11"
 authors = [{ name = "Wouter Vanden Hove", email = "wouter@libranet.eu" }]
 maintainers = [{ name = "Wouter Vanden Hove", email = "wouter@libranet.eu" }]
 keywords = ["uv", "pyproject.toml", "dependencies", "editable-install", "local-development", "pre-commit", "cli"]
@@ -42,8 +42,6 @@ classifiers = [
     "Programming Language :: Python :: 3.13",
     "Programming Language :: Python :: 3.12",
     "Programming Language :: Python :: 3.11",
-    "Programming Language :: Python :: 3.10",
-    "Programming Language :: Python :: 3.9",
     "Programming Language :: Python :: Implementation :: CPython",
     "Topic :: Software Development :: Libraries",
     "Topic :: Software Development",
@@ -165,7 +163,7 @@ testpaths = ["tests"]  # search for test-files
 cache-dir = "var/cache/ruff" # relative to project_root
 fix = true
 line-length = 120
-target-version = "py39"
+target-version = "py311"
 
 [tool.ruff.lint]
 select = ["ALL"]

src/uv_developer/about.py

@@ -5,7 +5,7 @@
 
 """
 
-from __future__ import annotations  # make | in typing work in Python 3.8
+from __future__ import annotations
 
 import importlib.metadata
 
@@ -24,7 +24,7 @@
 
 def _get(key: str) -> str | None:
     """Return a metadata field, or None when unavailable/unset."""
-    return metadata.get(key) if metadata is not None else None
+    return metadata[key] if metadata is not None and key in metadata else None
 
 
 authors: str | list[str] = _get("Author-email") or "unknown"

src/uv_developer/cli/toggle.py

@@ -3,7 +3,6 @@
 from __future__ import annotations
 
 import pathlib as pl
-import typing as tp  # `X | None` breaks cyclopts' runtime introspection on Python 3.9
 
 import cyclopts
 
@@ -16,7 +15,7 @@
 
 
 @app.default()
-def toggle(action: tp.Optional[str] = None, pyproject: pl.Path = pl.Path("pyproject.toml")) -> None:  # noqa: UP045
+def toggle(action: str | None = None, pyproject: pl.Path = pl.Path("pyproject.toml")) -> None:
     """Toggle [tool.uv.sources] local path overrides in pyproject.toml.
 
     By default (no action), the command auto-toggles:

src/uv_developer/toggle.py

@@ -40,12 +40,7 @@ def parse_source_entries(lines: list[str]) -> list[SourceEntry]:
             in_uv_sources = False
 
         if not in_uv_sources or not stripped:
-            # This *is* exercised (see test_toggle_sources_reports_no_entries and friends), but
-            # CPython 3.9's bytecode line-table doesn't emit a distinct trace event for a bare
-            # `continue` as the sole body of an `or`-guarded `if` here -- coverage.py sees it as
-            # never hit. Fixed by PEP 626 (Python 3.10+); confirmed by running the same suite
-            # under 3.13, where this line and its branch both report 100%.
-            continue  # pragma: no cover
+            continue
 
         match = SOURCE_KEY_RE.match(line)
         if not match:
@@ -102,11 +97,7 @@ def toggle_sources(mode: ToggleMode | None, pyproject: pl.Path) -> tuple[ToggleM
             if entry.pinned:
                 continue
             ensure_cloned(project_root, entry)
-            # Both branches are exercised (test_toggle_sources_warns_when_missing_clone_comment
-            # enters it, test_toggle_sources_no_write_when_already_in_target_mode skips it), but
-            # CPython 3.9's bytecode line-table doesn't record the "skip straight to `continue`"
-            # arc here as taken -- same PEP 626 limitation as above, confirmed fixed under 3.13.
-            if entry.line.strip().startswith("#"):  # pragma: no branch
+            if entry.line.strip().startswith("#"):
                 updated_lines[entry.idx] = re.sub(r"^\s*#\s*", "", entry.line)
                 changed = True
             continue