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Title: Add "never return bool for success/failure" guideline to function design skill by Copilot · Pull Request #1778 · usethis-python/usethis-python · GitHub

Open Graph Title: Add "never return bool for success/failure" guideline to function design skill by Copilot · Pull Request #1778 · usethis-python/usethis-python

X Title: Add "never return bool for success/failure" guideline to function design skill by Copilot · Pull Request #1778 · usethis-python/usethis-python

Description: Agent config lacked guidance against C-style bool returns for operation outcomes, leading to generated code like def add_entry(...) -> bool instead of raising exceptions. Added "Never return bool to signal success or failure" section to usethis-python-functions skill (v1.2 → v1.3) Includes rationale, alternatives (raise/return None), and bad/good examples Explicit carve-out for predicate functions (is_tool_used(), has_build_system()) where bool is appropriate # Bad: caller can silently ignore failure def add_config_entry(key: str, value: str) -> bool: if key in existing: return False existing[key] = value return True # Good: raise on failure, return nothing on success def add_config_entry(key: str, value: str) -> None: if key in existing: raise ValueError(f"Config entry '{key}' already exists.") existing[key] = value Skills used: usethis-skills-modify, usethis-qa-static-checks.

Open Graph Description: Agent config lacked guidance against C-style bool returns for operation outcomes, leading to generated code like def add_entry(...) -> bool instead of raising exceptions. Added "Never retu...

X Description: Agent config lacked guidance against C-style bool returns for operation outcomes, leading to generated code like def add_entry(...) -> bool instead of raising exceptions. Added "Ne...

Opengraph URL: https://github.com/usethis-python/usethis-python/pull/1778

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