YeonGyu-Kim d47b015100
fix: unknown single-word subcommand emits command_not_found (#825/#826)
Single-word all-alpha/dash tokens that don't match any known subcommand
now always emit command_not_found (with or without fuzzy suggestions).

Multi-word cases fall through to CliAction::Prompt (natural language
prompt passthrough like 'claw explain this' must still work). The
multi-word gap is documented as ROADMAP #826 (known limitation).

Tests:
- unknown_subcommand_json_emits_command_not_found (new)
- unknown_subcommand_text_emits_command_not_found_on_stderr (new)
- unknown_subcommand_typo_with_suggestions_json_emits_command_not_found (new)
- multi_word_unknown_subcommand_falls_through_to_prompt_826 (documents gap)

572 tests pass, 1 pre-existing worker_boot failure unrelated.
2026-05-29 14:58:07 +09:00
..