René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Fix: message_length_limit config is ignored when CLI flag is unset (commit/check)","articleBody":"### Description\n\nWhen `message_length_limit` is configured (e.g., in `pyproject.toml`), `cz commit / cz check` should enforce it unless the user explicitly overrides it via the CLI `-l/--message-length-limit`.\nCurrently, if the CLI argument exists but is `None/unset`, the code path ends up treating it as “no limit”, so the configured limit is not applied.\n\nReason why:\n1. `argparse` leaves `message_length_limit` as `None` when the flag isn’t provided (no default is set). eg. `cz commit`\n3. Because **the key still exists in arguments**, `arguments.get(\"message_length_limit\", ...)` returns `None` and never falls back to `config.settings`, effectively **bypassing the configured limit**.\n\n### Steps to reproduce\n\n1. Create a `pyproject.toml` with:\n```toml\n[tool.commitizen]\nname = \"cz_conventional_commits\"\nmessage_length_limit = 10\n```\n\n2. Run either:\n- `cz check --message \"feat: this is definitely too long\"`\n- or `cz commit --dry-run` and enter a subject that makes the first line longer than 10 characters.\n\n3. Ensure you did **not** pass -l/--message-length-limit.\n\n### Current behavior\n\nThe configured `message_length_limit` from `pyproject.toml` is **not enforced** when the CLI flag is unset, allowing too-long subjects to pass.\n\n### Desired behavior\n\n- Enforce `message_length_limit` from config when `-l/--message-length-limit` is not provided.\n- Precedence should be CLI \u003e config \u003e default (0 = no limit).\n- `-l 0` should explicitly disable the limit even if config sets one.\n\n### Screenshots\n\n\u003cimg width=\"922\" height=\"695\" alt=\"Image\" src=\"https://github.com/user-attachments/assets/34f7643b-a782-4f44-9704-ba9bd610be34\" /\u003e\n\n### Environment\n\nCommitizen Version: 4.13.9\nPython Version: 3.14.3 (main, Feb  3 2026, 15:32:20) [Clang 15.0.0 (clang-1500.1.0.2.5)]\nOperating System: Darwin","author":{"url":"https://github.com/ttw225","@type":"Person","name":"ttw225"},"datePublished":"2026-03-18T08:49:25.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":0},"url":"https://github.com/1899/commitizen/issues/1899"}