fix(tooling): advance exact Python dev pins with just update

- Resolve direct development tools as one compatible cross-platform set.
- Preserve runtime and build-system dependency requirements.
- Refresh Ruff, Semgrep, Ty, and their compatible transitive dependencies.

Author: acgetchell

AGENTS.md

@@ -295,7 +295,7 @@ just ci               # Full CI simulation (checks + tests + examples + bench co
 just test             # Lib + doc tests (fast)
 just test-all         # All tests (Rust, benchmark inputs, and Python)
 just examples         # Run all examples
-just update           # Update dependency locks and repository-owned Cargo tools
+just update           # Update dependency requirements, locks, and repository-owned Cargo tools
 just update-version vX.Y.Z # Update release metadata without upgrading dependencies
 ```
 

CONTRIBUTING.md

@@ -26,12 +26,12 @@ Use `just fix` when you intentionally want formatters and automatic fixes to
 change files. Run `just --list` for the full command surface.
 
 Use `just update` for deliberate dependency and tool maintenance. It composes
-`just update-dependencies`, which advances Cargo dependency requirements and
-the Cargo/uv locks, with `just update-cargo-tools`, which upgrades only the
-Cargo CLI packages owned by `setup-tools` and atomically reconciles their root
-`justfile` pins. The tool updater requires `cargo-install-update` from the
-`cargo-update` package and does not touch unrelated Cargo executables or uv's
-user-global tool environments.
+`just update-dependencies`, which advances Cargo dependency requirements, exact
+Python development-tool pins, and the Cargo/uv locks, with
+`just update-cargo-tools`, which upgrades only the Cargo CLI packages owned by
+`setup-tools` and atomically reconciles their root `justfile` pins. The tool
+updater requires `cargo-install-update` from the `cargo-update` package and does
+not touch unrelated Cargo executables or uv's user-global tool environments.
 
 The repository uses `cargo-nextest` for runnable Rust tests, `cargo-machete`
 for unused-dependency checks, and `just cargo-lock-check` to verify that the

Cargo.lock

@@ -29,8 +29,9 @@ git switch main
 git pull --ff-only
 ```
 
-Refresh dependency requirements, lockfiles, and repository-owned Cargo tool
-pins before creating the release branch:
+Refresh Cargo dependency requirements, exact Python development-tool pins,
+lockfiles, and repository-owned Cargo tool pins before creating the release
+branch:
 
 ```bash
 just update

docs/RELEASING.md

@@ -1084,11 +1084,20 @@ update-cargo-tools: _ensure-uv
     cargo install-update --locked "${packages[@]}"
     uv run --locked update-cargo-tool-pins
 
-# Advance Cargo dependency declarations, update Cargo and uv locks, then sync uv dev tools.
-[doc('Update Cargo.toml dependency requirements and all Cargo/uv locked dependencies.')]
-update-dependencies: _ensure-uv _ensure-cargo-edit
+# Advance Cargo and exact Python development requirements plus their lockfiles.
+[doc('Update Cargo and Python development requirements plus all Cargo/uv locked dependencies.')]
+update-dependencies: update-cargo-dependencies update-python-dependencies
+
+# Advance Cargo dependency declarations and lockfile entries.
+[doc('Update Cargo.toml dependency requirements and Cargo.lock.')]
+update-cargo-dependencies: _ensure-cargo-edit
     cargo upgrade
     cargo update
+
+# Resolve latest Python development tools, retain exact pins, and sync the environment.
+[doc('Update exact dependency-groups.dev pins and uv.lock through uv.')]
+update-python-dependencies: _ensure-uv
+    uv run --locked update-python-dev-pins
     uv lock --upgrade
     uv sync --locked --group dev
 

justfile

@@ -43,11 +43,12 @@ tag-release = "tag_release:main"
 check-docs-version-sync = "check_docs_version_sync:main"
 update-release-version = "update_release_version:main"
 update-cargo-tool-pins = "update_cargo_tool_pins:main"
+update-python-dev-pins = "update_python_dev_pins:main"
 
 # Configure setuptools to find modules in scripts/ directory.
 [tool.setuptools]
 package-dir = { "" = "scripts" }
-py-modules = [ "archive_changelog", "archive_performance", "bench_compare", "benchmark_contract", "check_docs_version_sync", "check_semgrep_fixtures", "criterion_dim_plot", "performance_artifacts", "postprocess_changelog", "subprocess_utils", "tag_release", "update_cargo_tool_pins", "update_release_version" ]
+py-modules = [ "archive_changelog", "archive_performance", "bench_compare", "benchmark_contract", "check_docs_version_sync", "check_semgrep_fixtures", "criterion_dim_plot", "performance_artifacts", "postprocess_changelog", "subprocess_utils", "tag_release", "update_cargo_tool_pins", "update_python_dev_pins", "update_release_version" ]
 
 [tool.ruff]
 line-length = 160
@@ -99,6 +100,7 @@ known-first-party = [
     "subprocess_utils",
     "tag_release",
     "update_cargo_tool_pins",
+    "update_python_dev_pins",
 ]
 force-single-line = false
 split-on-trailing-comma = true
@@ -149,10 +151,10 @@ package = true
 dev = [
     "actionlint-py==1.7.12.24",
     "pytest==9.1.1",
-    "ruff==0.16.2",
-    "semgrep==1.172.0",
+    "ruff==0.16.4",
+    "semgrep==1.174.0",
     "shellcheck-py==0.11.0.1",
     "shfmt-py==4.0.0",
-    "ty==0.0.69",
+    "ty==0.0.73",
     "yamllint==1.38.0",
 ]

pyproject.toml

@@ -27,9 +27,11 @@ uv sync --locked --group dev
 ### Updating dependencies and repository-owned tools
 
 Run `just update` for the deliberate maintenance workflow. It updates Cargo and
-uv dependency declarations and locks, upgrades only the Cargo CLI packages
-owned by `setup-tools`, and then uses `update-cargo-tool-pins` to reconcile the
-installed package versions with the root `justfile` atomically.
+exact Python development-tool declarations and their locks, upgrades only the
+Cargo CLI packages owned by `setup-tools`, and then reconciles the installed
+package versions with the root `justfile` atomically. The Python updater asks
+uv to resolve one cross-platform tool set before applying all changed exact
+pins together; it does not change runtime or build-system requirements.
 
 ## How to use it
 
@@ -282,6 +284,7 @@ validates SemVer, and handles GitHub's 125KB tag-annotation size limit.
 | `postprocess_changelog.py` | Normalize and reflow generated git-cliff Markdown safely |
 | `subprocess_utils.py` | Safe subprocess wrappers for git commands |
 | `update_cargo_tool_pins.py` | Reconcile repository-owned Cargo tool pins with installed versions |
+| `update_python_dev_pins.py` | Resolve and advance exact Python development-tool pins through uv |
 | `update_release_version.py` | Transactionally update deterministic release-version metadata |
 
 See `docs/RELEASING.md` for the full release workflow.

scripts/README.md

@@ -23,6 +23,7 @@
 import sys
 from dataclasses import dataclass
 from pathlib import Path
+from typing import cast
 
 # rumdl MD013 line-length limit used by this project.
 MAX_LINE_WIDTH = 160
@@ -216,17 +217,17 @@ def _squash_heading_parts(line: str) -> tuple[str, str, str] | None:
     if match is None:
         return None
 
-    raw_prefix = match.group("prefix")
+    raw_prefix = cast("str", match.group("prefix"))
     kind = re.sub(r"\([^)]+\)", "", raw_prefix).rstrip("!").casefold()
     label = _SQUASH_HEADING_LABELS.get(kind)
     if label is None:
         return None
 
-    title = match.group("title").strip()
+    title = cast("str", match.group("title")).strip()
     if not title:
         return None
 
-    return match.group("indent"), label, title[0].upper() + title[1:]
+    return cast("str", match.group("indent")), label, title[0].upper() + title[1:]
 
 
 def _normalize_squash_heading(line: str, *, nested: bool = False) -> str:
@@ -678,7 +679,11 @@ def _fence_parts(line: str) -> tuple[str, str, str] | None:
     match = _FENCE_RE.fullmatch(line)
     if match is None:
         return None
-    return match.group("indent"), match.group("fence"), match.group("info")
+    return (
+        cast("str", match.group("indent")),
+        cast("str", match.group("fence")),
+        cast("str", match.group("info")),
+    )
 
 
 def _opening_code_fence(line: str) -> _CodeFence | None:

scripts/postprocess_changelog.py

@@ -18,7 +18,7 @@
 import subprocess
 import tempfile
 from pathlib import Path
-from typing import Any
+from typing import Any, cast
 
 type RunKwargs = dict[str, Any]
 
@@ -105,10 +105,13 @@ def run_git_command(
     """
     git_path = get_safe_executable("git")
     run_kwargs = _build_run_kwargs("run_git_command", **kwargs)
-    return subprocess.run(  # noqa: S603,PLW1510
-        [git_path, *args],
-        cwd=cwd,
-        **run_kwargs,
+    return cast(
+        "subprocess.CompletedProcess[str]",
+        subprocess.run(  # noqa: S603,PLW1510
+            [git_path, *args],
+            cwd=cwd,
+            **run_kwargs,
+        ),
     )
 
 
@@ -134,10 +137,13 @@ def run_cargo_command(
     """
     cargo_path = get_safe_executable("cargo")
     run_kwargs = _build_run_kwargs("run_cargo_command", **kwargs)
-    return subprocess.run(  # noqa: S603,PLW1510
-        [cargo_path, *args],
-        cwd=cwd,
-        **run_kwargs,
+    return cast(
+        "subprocess.CompletedProcess[str]",
+        subprocess.run(  # noqa: S603,PLW1510
+            [cargo_path, *args],
+            cwd=cwd,
+            **run_kwargs,
+        ),
     )
 
 
@@ -165,10 +171,13 @@ def run_safe_command(
     """
     command_path = get_safe_executable(command)
     run_kwargs = _build_run_kwargs(f"run_safe_command for {command}", **kwargs)
-    return subprocess.run(  # noqa: S603,PLW1510
-        [command_path, *args],
-        cwd=cwd,
-        **run_kwargs,
+    return cast(
+        "subprocess.CompletedProcess[str]",
+        subprocess.run(  # noqa: S603,PLW1510
+            [command_path, *args],
+            cwd=cwd,
+            **run_kwargs,
+        ),
     )
 
 
@@ -279,11 +288,14 @@ def run_git_command_with_input(
     with tempfile.TemporaryFile() as stdin:
         stdin.write(payload)
         stdin.seek(0)
-        return subprocess.run(  # noqa: S603,PLW1510
-            [git_path, *args],
-            cwd=cwd,
-            stdin=stdin,
-            **run_kwargs,
+        return cast(
+            "subprocess.CompletedProcess[str]",
+            subprocess.run(  # noqa: S603,PLW1510
+                [git_path, *args],
+                cwd=cwd,
+                stdin=stdin,
+                **run_kwargs,
+            ),
         )
 
 

scripts/subprocess_utils.py

@@ -77,14 +77,17 @@ def test_update_workflow_composes_scoped_dependency_and_tool_updates() -> None:
     """Update recipes should cover repo state without touching unrelated global tools."""
     recipes = just_recipes()
     update_dependencies = {dependency["recipe"] for dependency in recipes["update"]["dependencies"]}
+    dependency_updates = {dependency["recipe"] for dependency in recipes["update-dependencies"]["dependencies"]}
 
     assert update_dependencies == {"update-cargo-tools", "update-dependencies"}
+    assert dependency_updates == {"update-cargo-dependencies", "update-python-dependencies"}
 
     dependency_result = run_just("--dry-run", "update-dependencies")
     dependency_update = dependency_result.stdout + dependency_result.stderr
     assert "cargo upgrade" in dependency_update
     assert "cargo upgrade --incompatible allow" not in dependency_update
     assert "cargo update" in dependency_update
+    assert "update-python-dev-pins" in dependency_update
     assert "uv lock --upgrade" in dependency_update
     assert "uv sync --locked --group dev" in dependency_update
     assert "cargo install-update --all" not in dependency_update