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Reviewer's GuideThis PR refactors the ratchet coverage GitHub Action by migrating inline shell logic into dedicated Python scripts invoked via uv’s script runner, using Typer for argument parsing and reusable helpers for coverage extraction and baseline management. Sequence diagram for refactored ratchet coverage GitHub Action workflowsequenceDiagram
participant GitHubActions as GitHub Actions Runner
participant InstallScript as install_cargo_llvm_cov.py
participant RunCoverage as run_coverage.py
participant RatchetCoverage as ratchet_coverage.py
GitHubActions->>InstallScript: uv run --script install_cargo_llvm_cov.py
InstallScript->>InstallScript: cargo install cargo-llvm-cov
GitHubActions->>RunCoverage: uv run --script run_coverage.py
RunCoverage->>RunCoverage: cargo llvm-cov --summary-only $ARGS
RunCoverage->>RunCoverage: extract_percent(output)
RunCoverage->>GitHubActions: Write percent to $GITHUB_OUTPUT
GitHubActions->>RatchetCoverage: uv run --script ratchet_coverage.py (CURRENT_PERCENT env)
RatchetCoverage->>RatchetCoverage: read_baseline(baseline_file)
RatchetCoverage->>RatchetCoverage: Compare current vs baseline
RatchetCoverage->>RatchetCoverage: Write new baseline if not decreased
Class diagram for new ratchet_coverage Python scriptsclassDiagram
class install_cargo_llvm_cov {
+main()
}
class run_coverage {
+main(args: str, github_output: Path)
+extract_percent(output: str) str
}
class ratchet_coverage {
+main(baseline_file: Path, current: float)
+read_baseline(file: Path) float
}
install_cargo_llvm_cov <.. run_coverage : uses plumbum.cmd.cargo
install_cargo_llvm_cov <.. ratchet_coverage : uses plumbum.cmd.cargo
run_coverage <.. ratchet_coverage : shares Typer usage
run_coverage <.. ratchet_coverage : both use Typer CLI
run_coverage <.. ratchet_coverage : both use Path
Flow diagram for the new ratchet coverage action processflowchart TD
A[Start GitHub Action] --> B[Install cargo-llvm-cov via Python script]
B --> C[Run coverage via Python script]
C --> D[Parse and write percent to GITHUB_OUTPUT]
D --> E[Ratchet coverage check via Python script]
E -->|Coverage decreased| F[Fail Action]
E -->|Coverage OK| G[Update baseline file]
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Summary by CodeRabbit
Summary by CodeRabbit
WalkthroughThe ratchet coverage GitHub Action has been refactored to replace inline shell script steps with dedicated Python scripts for installing Changes
Sequence Diagram(s)sequenceDiagram
participant GitHub Action
participant install_cargo_llvm_cov.py
participant run_coverage.py
participant ratchet_coverage.py
GitHub Action->>install_cargo_llvm_cov.py: Install cargo-llvm-cov
install_cargo_llvm_cov.py-->>GitHub Action: Installation complete
GitHub Action->>run_coverage.py: Run coverage analysis
run_coverage.py-->>GitHub Action: Output coverage percentage
GitHub Action->>ratchet_coverage.py: Enforce ratchet with coverage percentage
ratchet_coverage.py-->>GitHub Action: Update baseline or fail on regression
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Hey @leynos - I've reviewed your changes - here's some feedback:
- The three Python scripts share identical shebang headers and dependency declarations—consider extracting those and any common Typer options into a shared module or template to reduce duplication and keep them in sync.
- Wrap calls to plumbum (e.g.
cargo installandcargo llvm-cov) in try/except or explicitly check their return codes so you can emit clearer, contextual error messages instead of relying on generic exceptions. - Before comparing
currentandbaseline, normalize both floats to the same precision (e.g. round to two decimals) to avoid failures caused by minor floating‐point rounding differences.
Prompt for AI Agents
Please address the comments from this code review:
## Overall Comments
- The three Python scripts share identical shebang headers and dependency declarations—consider extracting those and any common Typer options into a shared module or template to reduce duplication and keep them in sync.
- Wrap calls to plumbum (e.g. `cargo install` and `cargo llvm-cov`) in try/except or explicitly check their return codes so you can emit clearer, contextual error messages instead of relying on generic exceptions.
- Before comparing `current` and `baseline`, normalize both floats to the same precision (e.g. round to two decimals) to avoid failures caused by minor floating‐point rounding differences.Help me be more useful! Please click 👍 or 👎 on each comment and I'll use the feedback to improve your reviews.
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Actionable comments posted: 6
📜 Review details
Configuration used: CodeRabbit UI
Review profile: ASSERTIVE
Plan: Pro
📒 Files selected for processing (4)
.github/actions/ratchet-coverage/action.yml(2 hunks)scripts/ratchet_coverage/install_cargo_llvm_cov.py(1 hunks)scripts/ratchet_coverage/ratchet_coverage.py(1 hunks)scripts/ratchet_coverage/run_coverage.py(1 hunks)
🧰 Additional context used
📓 Path-based instructions (2)
`.github/actions/*/{action.yml,README.md,CHANGELOG.md,src/,tests/}`: Each action...
.github/actions/*/{action.yml,README.md,CHANGELOG.md,src/,tests/}: Each action must have its own directory under .github/actions/, containing action.yml, README.md, src/, tests/, and CHANGELOG.md
📄 Source: CodeRabbit Inference Engine (AGENTS.md)
List of files the instruction was applied to:
.github/actions/ratchet-coverage/action.yml
`.github/actions/*/action.yml`: Fill in action.yml with every input and output; ...
.github/actions/*/action.yml: Fill in action.yml with every input and output; mark required ones clearly
For composite actions and path context, use "${{ github.action_path }}" when referencing sibling scripts for portability
📄 Source: CodeRabbit Inference Engine (AGENTS.md)
List of files the instruction was applied to:
.github/actions/ratchet-coverage/action.yml
🧬 Code Graph Analysis (2)
scripts/ratchet_coverage/ratchet_coverage.py (2)
scripts/ratchet_coverage/install_cargo_llvm_cov.py (1)
main(10-11)scripts/ratchet_coverage/run_coverage.py (1)
main(21-32)
scripts/ratchet_coverage/run_coverage.py (2)
scripts/ratchet_coverage/install_cargo_llvm_cov.py (1)
main(10-11)scripts/ratchet_coverage/ratchet_coverage.py (1)
main(20-36)
🪛 Pylint (3.3.7)
scripts/ratchet_coverage/install_cargo_llvm_cov.py
[convention] 1-1: Missing module docstring
(C0114)
[error] 6-6: Unable to import 'plumbum.cmd'
(E0401)
[error] 7-7: Unable to import 'typer'
(E0401)
[convention] 10-10: Missing function or method docstring
(C0116)
scripts/ratchet_coverage/ratchet_coverage.py
[convention] 1-1: Missing module docstring
(C0114)
[error] 7-7: Unable to import 'typer'
(E0401)
[convention] 20-20: Missing function or method docstring
(C0116)
scripts/ratchet_coverage/run_coverage.py
[convention] 1-1: Missing module docstring
(C0114)
[error] 9-9: Unable to import 'typer'
(E0401)
[error] 10-10: Unable to import 'plumbum.cmd'
(E0401)
[convention] 13-13: Missing function or method docstring
(C0116)
[convention] 21-21: Missing function or method docstring
(C0116)
🪛 Ruff (0.11.9)
scripts/ratchet_coverage/ratchet_coverage.py
21-23: Do not perform function call typer.Option in argument defaults; instead, perform the call within the function, or read the default from a module-level singleton variable
(B008)
22-22: Trailing comma missing
Add trailing comma
(COM812)
scripts/ratchet_coverage/run_coverage.py
23-23: Do not perform function call typer.Option in argument defaults; instead, perform the call within the function, or read the default from a module-level singleton variable
(B008)
🔇 Additional comments (3)
scripts/ratchet_coverage/run_coverage.py (1)
21-32: Well-structured coverage execution and output handling.The implementation correctly handles optional arguments, executes the coverage command, and writes the output to the GitHub Actions output file. The use of
shlex.split()for argument parsing is appropriate.scripts/ratchet_coverage/ratchet_coverage.py (2)
10-17: Excellent error handling in baseline reading.The
read_baselinefunction handles edge cases well, returning 0.0 for missing files or invalid content. This ensures the ratchet system starts with a sensible baseline.
20-36: Robust coverage comparison and baseline management.The implementation correctly compares current coverage against the baseline, provides clear feedback, and updates the baseline file when coverage doesn't decrease. The directory creation ensures the baseline file can be written successfully.
| ${{ runner.os }}-llvmcov- | ||
| - name: Install cargo-llvm-cov | ||
| run: cargo install cargo-llvm-cov | ||
| run: uv run --script scripts/ratchet_coverage/install_cargo_llvm_cov.py |
There was a problem hiding this comment.
🛠️ Refactor suggestion
Move scripts to action directory for portability.
The coding guidelines specify that actions should reference sibling scripts using ${{ github.action_path }} for portability. The current implementation references scripts in a global directory which violates this guideline.
Consider moving the scripts to .github/actions/ratchet-coverage/src/ and updating the reference:
- run: uv run --script scripts/ratchet_coverage/install_cargo_llvm_cov.py
+ run: uv run --script ${{ github.action_path }}/src/install_cargo_llvm_cov.py📝 Committable suggestion
‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.
| run: uv run --script scripts/ratchet_coverage/install_cargo_llvm_cov.py | |
| run: uv run --script ${{ github.action_path }}/src/install_cargo_llvm_cov.py |
🤖 Prompt for AI Agents
In .github/actions/ratchet-coverage/action.yml at line 36, the script path is
referenced globally which breaks portability guidelines. Move the scripts to
.github/actions/ratchet-coverage/src/ and update the run command to use the
relative path with ${{ github.action_path }} to reference the script, ensuring
the action is portable and follows coding standards.
|
|
||
| mkdir -p "$(dirname "$file")" | ||
| printf '%.2f' "$current" > "$file" | ||
| run: uv run --script scripts/ratchet_coverage/ratchet_coverage.py |
There was a problem hiding this comment.
🛠️ Refactor suggestion
Use action path for script reference.
Apply the same portability fix as suggested for the other scripts.
- run: uv run --script scripts/ratchet_coverage/ratchet_coverage.py
+ run: uv run --script ${{ github.action_path }}/src/ratchet_coverage.py🤖 Prompt for AI Agents
In .github/actions/ratchet-coverage/action.yml at line 49, the script path is
hardcoded and not using the action's directory path, which reduces portability.
Update the run command to reference the script using the action's path variable
(e.g., ${{ github.action_path }}) to ensure the script path is correctly
resolved regardless of where the action is run.
| echo "$output" | ||
| percent=$(echo "$output" | grep -oEm1 '[0-9]+(\.[0-9]+)?%' | tr -d '%') | ||
| echo "percent=$percent" >> "$GITHUB_OUTPUT" | ||
| run: uv run --script scripts/ratchet_coverage/run_coverage.py |
There was a problem hiding this comment.
🛠️ Refactor suggestion
Use action path for script reference.
Apply the same portability fix as suggested for the install script.
- run: uv run --script scripts/ratchet_coverage/run_coverage.py
+ run: uv run --script ${{ github.action_path }}/src/run_coverage.py🤖 Prompt for AI Agents
In .github/actions/ratchet-coverage/action.yml at line 46, the script path is
hardcoded and not using the action's directory path, which reduces portability.
Update the run command to reference the script using the action's path variable
(e.g., ${{ github.action_path }}) to ensure the script is correctly located
regardless of where the action is run from.
| def extract_percent(output: str) -> str: | ||
| match = re.search(r"([0-9]+(?:\.[0-9]+)?)%", output) | ||
| if not match: | ||
| typer.echo("Could not parse coverage percent", err=True) | ||
| raise typer.Exit(code=1) | ||
| return match.group(1) |
There was a problem hiding this comment.
🧹 Nitpick (assertive)
Consider making the regex more specific.
The current regex r"([0-9]+(?:\.[0-9]+)?)%" will match any percentage in the output. Consider making it more specific to avoid false matches, such as looking for coverage-related context.
def extract_percent(output: str) -> str:
- match = re.search(r"([0-9]+(?:\.[0-9]+)?)%", output)
+ # Look for coverage percentage in typical llvm-cov output format
+ match = re.search(r"(?:coverage|Coverage).*?([0-9]+(?:\.[0-9]+)?)%", output)
if not match:
typer.echo("Could not parse coverage percent", err=True)
raise typer.Exit(code=1)
return match.group(1)📝 Committable suggestion
‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.
| def extract_percent(output: str) -> str: | |
| match = re.search(r"([0-9]+(?:\.[0-9]+)?)%", output) | |
| if not match: | |
| typer.echo("Could not parse coverage percent", err=True) | |
| raise typer.Exit(code=1) | |
| return match.group(1) | |
| def extract_percent(output: str) -> str: | |
| # Look for coverage percentage in typical llvm-cov output format | |
| match = re.search(r"(?:coverage|Coverage).*?([0-9]+(?:\.[0-9]+)?)%", output) | |
| if not match: | |
| typer.echo("Could not parse coverage percent", err=True) | |
| raise typer.Exit(code=1) | |
| return match.group(1) |
🧰 Tools
🪛 Pylint (3.3.7)
[convention] 13-13: Missing function or method docstring
(C0116)
🤖 Prompt for AI Agents
In scripts/ratchet_coverage/run_coverage.py around lines 13 to 18, the regex
used to extract the coverage percentage is too general and may match unrelated
percentages. Update the regex to include coverage-specific context, such as
preceding keywords like "coverage" or "covered", to ensure it only matches the
intended coverage percentage in the output.
Co-authored-by: coderabbitai[bot] <136622811+coderabbitai[bot]@users.noreply.github.com>
Co-authored-by: sourcery-ai[bot] <58596630+sourcery-ai[bot]@users.noreply.github.com>
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Actionable comments posted: 2
♻️ Duplicate comments (2)
scripts/ratchet_coverage/run_coverage.py (1)
13-18: Consider making the regex more specific.The current regex
r"([0-9]+(?:\.[0-9]+)?)%"will match any percentage in the output. Consider making it more specific to avoid false matches, such as looking for coverage-related context.def extract_percent(output: str) -> str: - match = re.search(r"([0-9]+(?:\.[0-9]+)?)%", output) + # Look for coverage percentage in typical llvm-cov output format + match = re.search(r"(?:coverage|Coverage).*?([0-9]+(?:\.[0-9]+)?)%", output) if not match: typer.echo("Could not parse coverage percent", err=True) raise typer.Exit(code=1) - return match[1] + return match[1]scripts/ratchet_coverage/install_cargo_llvm_cov.py (1)
19-20: Consider simplifying the entry point.Since this script doesn't require CLI arguments, the use of
typer.run()is unnecessary. A simple function call would suffice.if __name__ == "__main__": - typer.run(main) + main()
📜 Review details
Configuration used: CodeRabbit UI
Review profile: ASSERTIVE
Plan: Pro
📒 Files selected for processing (2)
scripts/ratchet_coverage/install_cargo_llvm_cov.py(1 hunks)scripts/ratchet_coverage/run_coverage.py(1 hunks)
🧰 Additional context used
🧬 Code Graph Analysis (1)
scripts/ratchet_coverage/install_cargo_llvm_cov.py (2)
scripts/ratchet_coverage/run_coverage.py (1)
main(21-32)scripts/ratchet_coverage/ratchet_coverage.py (1)
main(20-36)
🪛 Ruff (0.11.9)
scripts/ratchet_coverage/install_cargo_llvm_cov.py
14-14: Do not catch blind exception: Exception
(BLE001)
16-16: Within an except clause, raise exceptions with raise ... from err or raise ... from None to distinguish them from errors in exception handling
(B904)
scripts/ratchet_coverage/run_coverage.py
23-23: Do not perform function call typer.Option in argument defaults; instead, perform the call within the function, or read the default from a module-level singleton variable
(B008)
🪛 Pylint (3.3.7)
scripts/ratchet_coverage/install_cargo_llvm_cov.py
[convention] 1-1: Missing module docstring
(C0114)
[error] 6-6: Unable to import 'plumbum.cmd'
(E0401)
[error] 7-7: Unable to import 'typer'
(E0401)
[convention] 10-10: Missing function or method docstring
(C0116)
scripts/ratchet_coverage/run_coverage.py
[convention] 1-1: Missing module docstring
(C0114)
[error] 9-9: Unable to import 'typer'
(E0401)
[error] 10-10: Unable to import 'plumbum.cmd'
(E0401)
[convention] 13-13: Missing function or method docstring
(C0116)
[convention] 21-21: Missing function or method docstring
(C0116)
🔇 Additional comments (4)
scripts/ratchet_coverage/run_coverage.py (2)
1-11: LGTM!The script header and imports are well-structured and appropriate for a uv script.
35-36: LGTM!Standard typer application entry point.
scripts/ratchet_coverage/install_cargo_llvm_cov.py (2)
1-5: LGTM! Modern script setup with appropriate dependencies.The use of
uv run --scriptwith inline dependency specification is a clean approach for executable Python scripts.
6-7: LGTM! Appropriate imports for the script's functionality.The imports are well-chosen for command execution and CLI interface.
| def main( | ||
| args: str = typer.Option("", envvar="INPUT_ARGS"), | ||
| github_output: Path = typer.Option(..., envvar="GITHUB_OUTPUT"), | ||
| ) -> None: | ||
| cmd = cargo["llvm-cov", "--summary-only"] | ||
| if args: | ||
| cmd = cmd[shlex.split(args)] | ||
| output = cmd() | ||
| typer.echo(output) | ||
| percent = extract_percent(output) | ||
| with github_output.open("a") as fh: | ||
| fh.write(f"percent={percent}\n") |
There was a problem hiding this comment.
🧹 Nitpick (assertive)
Address the function call in argument defaults.
The use of typer.Option(...) in the function signature triggers a static analysis warning (Ruff B008). While this works with typer, consider refactoring to follow best practices.
def main(
- args: str = typer.Option("", envvar="INPUT_ARGS"),
- github_output: Path = typer.Option(..., envvar="GITHUB_OUTPUT"),
+ args: str = typer.Option("", envvar="INPUT_ARGS"),
+ github_output: Path = typer.Option(..., envvar="GITHUB_OUTPUT"),
) -> None:
+ """Run cargo llvm-cov and extract coverage percentage."""
cmd = cargo["llvm-cov", "--summary-only"]
if args:
cmd = cmd[shlex.split(args)]
output = cmd()
typer.echo(output)
percent = extract_percent(output)
with github_output.open("a") as fh:
fh.write(f"percent={percent}\n")Alternative approach to avoid the warning:
+def main(
+ args: str = "",
+ github_output: str = "",
+) -> None:
+ """Run cargo llvm-cov and extract coverage percentage."""
+ # Get values from environment if not provided
+ if not args:
+ args = os.environ.get("INPUT_ARGS", "")
+ if not github_output:
+ github_output = os.environ["GITHUB_OUTPUT"]
+
+ github_output_path = Path(github_output)
+ # ... rest of the function📝 Committable suggestion
‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.
| def main( | |
| args: str = typer.Option("", envvar="INPUT_ARGS"), | |
| github_output: Path = typer.Option(..., envvar="GITHUB_OUTPUT"), | |
| ) -> None: | |
| cmd = cargo["llvm-cov", "--summary-only"] | |
| if args: | |
| cmd = cmd[shlex.split(args)] | |
| output = cmd() | |
| typer.echo(output) | |
| percent = extract_percent(output) | |
| with github_output.open("a") as fh: | |
| fh.write(f"percent={percent}\n") | |
| def main( | |
| args: str = typer.Option("", envvar="INPUT_ARGS"), | |
| github_output: Path = typer.Option(..., envvar="GITHUB_OUTPUT"), | |
| ) -> None: | |
| """Run cargo llvm-cov and extract coverage percentage.""" | |
| cmd = cargo["llvm-cov", "--summary-only"] | |
| if args: | |
| cmd = cmd[shlex.split(args)] | |
| output = cmd() | |
| typer.echo(output) | |
| percent = extract_percent(output) | |
| with github_output.open("a") as fh: | |
| fh.write(f"percent={percent}\n") |
🧰 Tools
🪛 Ruff (0.11.9)
23-23: Do not perform function call typer.Option in argument defaults; instead, perform the call within the function, or read the default from a module-level singleton variable
(B008)
🪛 Pylint (3.3.7)
[convention] 21-21: Missing function or method docstring
(C0116)
🤖 Prompt for AI Agents
In scripts/ratchet_coverage/run_coverage.py around lines 21 to 32, the use of
typer.Option(...) directly in the function argument defaults causes a static
analysis warning (Ruff B008). To fix this, remove the typer.Option calls from
the function signature and instead define the options inside the function body
or use a separate function to parse the options. This avoids calling functions
in default argument values and aligns with best practices.
| def main() -> None: | ||
| try: | ||
| cargo["install", "cargo-llvm-cov"]() | ||
| typer.echo("cargo-llvm-cov installed successfully") | ||
| except Exception as e: | ||
| typer.echo(f"Failed to install cargo-llvm-cov: {e}", err=True) | ||
| raise typer.Exit(code=1) |
There was a problem hiding this comment.
🛠️ Refactor suggestion
Improve exception handling specificity and add documentation.
Good work adding error handling as suggested in the previous review. Consider these improvements:
- Add function docstring for clarity
- Use more specific exception handling - catch
plumbum.ProcessExecutionErrorinstead of broadException - Improve exception chaining as flagged by static analysis
def main() -> None:
+ """Install cargo-llvm-cov using cargo."""
try:
cargo["install", "cargo-llvm-cov"]()
typer.echo("cargo-llvm-cov installed successfully")
- except Exception as e:
+ except Exception as e:
typer.echo(f"Failed to install cargo-llvm-cov: {e}", err=True)
- raise typer.Exit(code=1)
+ raise typer.Exit(code=1) from eNote: For more specific exception handling, you could import from plumbum import ProcessExecutionError and catch that instead of Exception.
📝 Committable suggestion
‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.
| def main() -> None: | |
| try: | |
| cargo["install", "cargo-llvm-cov"]() | |
| typer.echo("cargo-llvm-cov installed successfully") | |
| except Exception as e: | |
| typer.echo(f"Failed to install cargo-llvm-cov: {e}", err=True) | |
| raise typer.Exit(code=1) | |
| def main() -> None: | |
| """Install cargo-llvm-cov using cargo.""" | |
| try: | |
| cargo["install", "cargo-llvm-cov"]() | |
| typer.echo("cargo-llvm-cov installed successfully") | |
| except Exception as e: | |
| typer.echo(f"Failed to install cargo-llvm-cov: {e}", err=True) | |
| raise typer.Exit(code=1) from e |
🧰 Tools
🪛 Ruff (0.11.9)
14-14: Do not catch blind exception: Exception
(BLE001)
16-16: Within an except clause, raise exceptions with raise ... from err or raise ... from None to distinguish them from errors in exception handling
(B904)
🪛 Pylint (3.3.7)
[convention] 10-10: Missing function or method docstring
(C0116)
🤖 Prompt for AI Agents
In scripts/ratchet_coverage/install_cargo_llvm_cov.py around lines 10 to 16,
improve the main function by adding a clear docstring explaining its purpose.
Replace the broad Exception catch with a more specific catch for
plumbum.ProcessExecutionError by importing it from plumbum. Also, when
re-raising the exception, use exception chaining with 'raise ... from e' to
preserve the original traceback for better debugging.
1 participant
Summary
uv run --scriptshlexand exposeGITHUB_OUTPUTvia TyperTesting
python3 -m py_compile scripts/ratchet_coverage/*.pyhttps://chatgpt.com/codex/tasks/task_e_6869726f4fb0832291bae91bc5ea88a4
Summary by Sourcery
Refactor the ratchet-coverage GitHub Action to replace shell steps with modular Python scripts invoked via uv run, enhancing coverage parsing and baseline management.
Enhancements:
CI:
Tests: