fix(reports): add extension handling to TerminalReport.generate_to_file (#83)

[himanshu231204]

Summary

TerminalReport.generate_to_file wrote the raw output_path with no extension logic, while every other report generator applies consistent extension handling:

• MarkdownReport -> defaults to report.md
• JSONReport -> defaults to report.json
• HTMLReport -> defaults to report.html and normalizes a wrong suffix to .html
• ComparisonReport -> defaults to comparison.txt

This inconsistency meant a call like generate_to_file(report, "my_run") produced a file named my_run with no extension, unlike the other formats. The terminal test even hard-coded report.txt, masking the gap. (issue #83)

Changes

openagent_eval/reports/terminal.py — generate_to_file now mirrors the HTML generator's robust pattern:

path = Path(output_path)
if path.suffix == "":
    path = path / "report.txt"
elif path.suffix.lower() != ".txt":
    path = path.with_suffix(".txt")
path = self._prepare_output_file(path)

Behavior:

• No extension -> appends report.txt
• Wrong extension (e.g. .log) -> normalized to .txt
• Explicit .txt -> preserved as-is

tests/unit/test_reports/test_terminal.py — added three tests covering default, normalization, and passthrough paths.

Testing

• uv run pytest tests/unit/test_reports/ -> 98 passed
• uv run ruff check on changed files -> clean
• New cases: test_generate_to_file_defaults_to_txt, test_generate_to_file_normalizes_wrong_suffix, test_generate_to_file_keeps_txt_suffix

Checklist

• Fix matches the extension-handling pattern of other generators
• Unit tests added for success + edge (wrong suffix) paths
• ruff passes
• Full reports test suite passes (no regressions)
• Branch fix/83-terminal-report-extension off main, not developed on main

[github-actions]

🎉 Congratulations @himanshu231204!

Your pull request has been successfully merged into main. 🚀

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