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Claude Development Notes

Structure

Typically begin by reading README.md.

Key files:

  • persistproc/cli.py
  • persistproc/tools.py
  • persistproc/process_manager.py

Running Tests

Use uv run python -m pytest to run tests. For development, use uv run python -m pytest -x --maxfail=3 to stop after 3 failures.

There is critical code in tests/conftest.py and tests/helpers.py. Some defaults are changed via env vars.

Linting and Type Checking

  • Linting: uv run ruff check
  • Formatting: uv run ruff format

Development Guidelines

NEVER run persistproc commands manually during development. The persistproc CLI should only be invoked through the test suite. Manual CLI usage can interfere with test servers and cause unexpected failures.

Instead:

  • Use the test suite to verify functionality
  • Use the test helpers in tests/helpers.py for programmatic testing
  • Debug issues through test output and logging

NEVER background a process with an & suffix.

ALWAYS use git --no-pager diff for all diffs, never git diff.

If you get a timeout in tests while running locally, it is NOT a "timing issue" or "race condition." It is as REAL BUG. You are running on a fast computer that is not under load. The correct response to a test timeout is to ADD DEBUG LOGGING and THINK HARD.

Workflow guidelines

For EVERY programming task assigned, you are NOT FINISHED until you can produce a message in the following format:

After-action report for (task title here)

Relevant files found:

  • (list them)

(1-3 paragraphs justifying why the change is both correct and comprehensive)

Steps taken to verify:

  • (list them)

Web links supporting my changes:

  • (list them)

I solemnly swear there are no further steps I can take to verify the changes within the boundaries set for me. I ran the entire test suite just now, which you can see in the output above. If you can't see a complete passing run of all tests, I admit this whole report is bullshit because I didn't do everything you asked.

Pitfalls

persistproc/run.py has soft, non-type-safe dependencies on other parts of the program. Audit it carefully, especially after changes to persistproc/tools.py.