… 3.9.

- Expand test suite from 11 to 46 tests (92.55% coverage achieved)
- Add test_command_line.py with 11 CLI tests
- Add 15 new tests to test_autoplot.py
- Add 8 new tests to test_figure.py (scatter, log axes, subplots, etc.)
- Create vplot/__main__.py for module execution support
- Add .coveragerc for coverage configuration matching vspace
- Update GitHub Actions workflow with codecov integration
- Configure Python 3.9-3.12 testing matrix
- Add modernization plan to .claude/claude.md

Coverage breakdown:
- command_line.py: 100%
- colors.py: 100%
- __init__.py: 100%
- auto_plot.py: 98.39%
- figure.py: 90.05%
- Total: 92.55%

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Sonnet 4.5 <[email protected]>

Resolved conflicts in .github/workflows/tests.yml:
- Kept actions/setup-python@v5 (more standard than conda setup)
- Kept flexible test result publishing condition (runner.os == 'Linux')

No breaking changes to source code - only test expansions and coverage.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Sonnet 4.5 <[email protected]>

… GitHub Actions.

Changes:
- Use ubuntu-22.04 (explicit version) instead of ubuntu-latest
- Update to actions/checkout@v5 (from v4)
- Add diagnostic test step before full test suite
- Increase test timeout from 10 to 20 minutes
- Add -s flag to pytest for subprocess output visibility
- Update conditional checks from ubuntu-latest to ubuntu-22.04
- Standardize step names ("Install VPLanet", "Publish test results")
- Remove "Clone vplot repo" name (use default from vspace)

Testing limited to ubuntu-22.04 and Python 3.9 until GitHub Actions is debugged.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Sonnet 4.5 <[email protected]>

Clarified that vplanet.run() will either run the simulation or load
existing output depending on whether log files exist.

Note: Tests currently fail in CI due to "(null)" units in public vplanet
version. This is a known limitation already fixed in vplanet-private and
will be resolved when migrating to vplanet-private.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Sonnet 4.5 <[email protected]>

The diagnostic test was blocking the full test run from executing. Since
we know tests will fail due to the vplanet "(null)" units issue (a known
limitation in public vplanet), we should run all tests to see which ones
pass and get full coverage data.

Removing the diagnostic step allows the full test suite to run and provides
better visibility into which tests are affected by the vplanet issue versus
other potential problems.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Sonnet 4.5 <[email protected]>

Dependency Updates:
- numpy: 1.19.2+ → 2.0.0+
- matplotlib: 3.3.4+ → 3.9.0+
- astropy: 4.1.0/6.0.0+ → 6.1.0+
- pytest: 6.2.4+ → 8.0.0+
- pytest-cov: 2.11.1+ → 4.1.0+
- sphinx: 4.2.0 → 8.0.0+
- setuptools_scm: unversioned → 8.0+

Python Support:
- Updated to support Python 3.9-3.14 (dropped 3.6-3.8)
- environment.yml: python=3.8 → python>=3.9,<3.15

CI/CD Improvements:
- Expanded test matrix to Python 3.9-3.13 on ubuntu-22.04
- Added TODO for full OS matrix (ubuntu-24.04, macos) after vplanet-private
- Added pytest configuration to pyproject.toml

Configuration:
- pyproject.toml: Added [tool.pytest.ini_options] with minversion=8.0
- Removed deprecated test dependencies (nose, parameterized, pytest-env, etc.)
- Standardized version constraints across setup.py and environment.yml

This is a breaking release (v2.0) with no backward compatibility for Python <3.9.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Sonnet 4.5 <[email protected]>

Removed --timeout=300 from pyproject.toml addopts since pytest-timeout
plugin may not be installed in all environments. The timeout is still
enforced in GitHub Actions via the workflow configuration.

This completes Stage 1 (Dependency Updates) of the v2.0 modernization plan.

Created new documentation infrastructure:

1. docs/quickstart.rst - Comprehensive quickstart guide covering:
   - Installation requirements and instructions
   - Command-line interface usage with examples
   - Python API usage (auto_plot, manual plotting, scatter, log axes)
   - Feature overview (automatic labeling, colors, legends)
   - Troubleshooting section
   - Migration guide from v1.x

2. docs/index.rst - Updated to include quickstart in toctree

3. HISTORY.rst - Complete v2.0.0 release notes documenting:
   - Breaking changes (Python 3.9+ requirement, dependency updates)
   - New features (46 tests, 92.55% coverage, enhanced CI/CD)
   - Technical improvements
   - No API changes (backward compatible API)
   - Migration guide
   - Known limitations

This completes Stage 2 (Documentation Infrastructure) of the v2.0
modernization plan.

This is a breaking change implementing Hungarian notation throughout the
codebase per VPL style guide. IMPORTANT: User-facing matplotlib parameters
remain unchanged (xlog, ylog, max_label_length, etc.) to maintain
matplotlib compatibility.

Changes by file:

1. vplot/colors.py:
   - red → sRed, orange → sOrange, pale_blue → sPaleBlue,
     dark_blue → sDarkBlue, purple → sPurple

2. vplot/figure.py (374 lines - most critical):
   - _get_array_info() → ftupleGetArrayInfo()
   - _ax_observer() → fnAxObserver()
   - _add_labels() → fnAddLabels()
   - _format_axes() → fnFormatAxes()
   - figure_wrapper() → fnFigureWrapper()
   - mpl_figure → fnMplFigure
   - All internal variables converted (unit→sUnit, body→sBody, etc.)
   - Improved comments (removed "HACK" language, more explanatory)
   - VPLOTFigure parameters UNCHANGED (xlog, ylog, etc. kept as-is)

3. vplot/auto_plot.py:
   - auto_plot() → flistAutoPlot()
   - Parameters: path→sPath, sysname→sSysname, group→sGroup,
     bodies→listBodies, params→listParams, show→bShow
   - All internal variables converted
   - Fixed typo: "Kewyord" → "Keyword"
   - Updated docstring to reflect new parameter names

4. vplot/command_line.py:
   - _entry_point() → fnEntryPoint()
   - parser → parserArgs
   - Updated argparse destinations to match new parameter names
   - Updated to call flistAutoPlot()

5. vplot/__init__.py:
   - Updated import: auto_plot → flistAutoPlot

6. vplot/__main__.py:
   - Updated import: _entry_point → fnEntryPoint

7. setup.py:
   - Updated entry point: _entry_point → fnEntryPoint

Tests not yet updated - will fail until test conversion is complete.

This completes Stage 3 (Hungarian Notation Conversion) of the v2.0
modernization plan. Next: update tests to match new notation.

Updated all test files to use the new Hungarian notation function names:
- auto_plot() → flistAutoPlot()
- _entry_point() → fnEntryPoint()
- _add_labels() → fnAddLabels()
- _format_axes() → fnFormatAxes()

Tests will not run successfully until vplanet is updated to vplanet-private
due to known "(null)" unit handling issue in public version. This does not
affect the correctness of the Hungarian notation conversion.

This completes the test update portion of Stage 3.

Updated tests/test_autoplot.py to use Hungarian notation parameter names:
- show → bShow
- group → sGroup
- bodies → listBodies
- params → listParams

Temporarily downgraded astropy requirement from 6.1.0 to 6.0.0 for Python 3.9
compatibility (astropy 6.1.0 requires Python 3.10+).

Test results after regenerating vplanet output with vplanet-private:
- All 18 test_figure.py tests: PASS ✓
- All 16 test_autoplot.py tests: PASS ✓
- Total: 34/34 core tests passing locally with 88.30% coverage

This confirms the Hungarian notation conversion is functionally correct.
Command-line tests require setuptools entry point reinstallation.

The legend auto-labeling fallback used unit physical_type (e.g. "angle",
"dimensionless") when parameter descriptions were missing. This produced
spurious legend entries on scatter plots with derived quantities. Remove
the physical_type fallback from legend creation while preserving it for
axis labels where it remains useful. Also fix "Dimensionless" case
mismatch that prevented the dimensionless filter from ever matching
astropy's lowercase "dimensionless" output.

Co-Authored-By: Claude Opus 4.6 <[email protected]>

When subplots share axes (e.g. sharex=True), inner axes intentionally
have empty labels. The auto-labeling in fnAddLabels was overriding this
by setting labels from data metadata on all axes, making hidden labels
visible. Now checks is_last_row()/is_first_col() with shared-axis
sibling count before auto-labeling xlabel/ylabel. Inset axes (no
subplotspec) are unaffected.

Co-Authored-By: Claude Opus 4.6 <[email protected]>

Co-Authored-By: Claude Opus 4.6 <[email protected]>