Add --output-prefix flag to con-duct ls

[asmacdo]

Internal changes:

• Move DUCT_OUTPUT_PREFIX and EXECUTION_SUMMARY_FORMAT from duct_main.py to cli.py, renamed to DEFAULT_OUTPUT_PREFIX and DEFAULT_SUMMARY_FORMAT
• Break circular import by adding --output-prefix / -p to con-duct ls, so ls.py receives the prefix via args instead of importing it from duct_main

Fix latent bug:

• the output prefix default was evaluated at import time (before .env files were loaded); now os.getenv() runs at parser creation time inside main()

Closes #386

🤖 Generated with Claude Code

[codecov]

Codecov Report

❌ Patch coverage is 75.00000% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 91.47%. Comparing base (3756590) to head (30d03b9).

Files with missing lines	Patch %	Lines
src/con_duct/ls.py	60.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #393      +/-   ##
==========================================
- Coverage   91.81%   91.47%   -0.34%     
==========================================
  Files          15       15              
  Lines        1112     1115       +3     
  Branches      138      138              
==========================================
- Hits         1021     1020       -1     
- Misses         69       72       +3     
- Partials       22       23       +1     

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[Copilot]

Pull request overview

This PR adds an --output-prefix (-p) option to con-duct ls and relocates CLI default values into cli.py to remove a circular import and ensure defaults are read after .env files are loaded.

Changes:

• Move CLI default constants from duct_main.py to cli.py (DEFAULT_OUTPUT_PREFIX, DEFAULT_SUMMARY_FORMAT).
• Add --output-prefix/-p to con-duct ls and refactor ls.py to derive the glob search prefix from args instead of importing from duct_main.
• Update tests to use the new constants and cover custom ls --output-prefix behavior.

Reviewed changes

Copilot reviewed 7 out of 7 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
src/con_duct/cli.py	Introduces new default constants and uses env-evaluated defaults at parser creation; adds ls --output-prefix.
src/con_duct/duct_main.py	Removes CLI-default constants from the execution module.
src/con_duct/ls.py	Stops importing defaults and uses args.output_prefix to build the glob pattern when no paths are provided.
test/utils.py	Updates test helper to use new default constants from cli.py.
test/test_ls.py	Adds coverage for ls with default and custom output-prefix globbing.
test/duct_main/test_report.py	Updates imports to new summary format constant location.
test/duct_main/test_aggregation.py	Updates imports to new summary format constant location.

Comments suppressed due to low confidence (1)

src/con_duct/cli.py:287

• The help text for --output-prefix lists {datetime} as a supported format variable, but LogPaths.create() only provides pid and datetime_filesafe when calling output_prefix.format(...). Using {datetime} will raise a KeyError at runtime. Either add a datetime value to LogPaths.create() formatting, or remove {datetime} from the help/ docs to match actual behavior.

        help="File string format to be used as a prefix for the files -- the captured "
        "stdout and stderr and the resource usage logs. The understood variables are "
        "{datetime}, {datetime_filesafe}, and {pid}. "
        "Leading directories will be created if they do not exist. "

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[Copilot]

When no paths are provided, the glob pattern is built as f"{prefix}". If output_prefix starts with '{', prefix becomes an empty string and the pattern becomes "", which can unintentionally scan the entire CWD and match many unrelated files. Consider restricting the glob to info files (e.g., "*info.json") and/or handling the empty-prefix case explicitly to avoid overly broad globbing.

Suggested change

	pattern = f"{prefix}*"
	# Avoid overly broad globbing when prefix is empty (e.g., output_prefix starts with '{').
	# In that case, restrict the search to likely info files.
	if prefix:
	pattern = f"{prefix}*"
	else:
	pattern = "*info.json"