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Pinpoint #171: typed-error classifier gap discovered during #141 probe cycle #97. `claw list-sessions --help` emits: error: unexpected extra arguments after `claw list-sessions`: --help This format is used by multiple verbs that reject trailing positional args: - list-sessions - plugins (subcommands) - config (subcommands) - diff - load-session Before fix: {"error": "unexpected extra arguments after `claw list-sessions`: --help", "hint": null, "kind": "unknown", "type": "error"} After fix: {"error": "unexpected extra arguments after `claw list-sessions`: --help", "hint": "Run `claw --help` for usage.", "kind": "cli_parse", "type": "error"} The pattern `unexpected extra arguments after \`claw` is specific enough that it won't hijack generic prose mentioning "unexpected extra arguments" in other contexts (sanity test included). Side benefit: like #169/#170, correctly classified cli_parse errors now auto-trigger the #247 hint synthesizer. Related #141 gap not yet closed: `claw list-sessions --help` still errors instead of showing help (requires separate parser fix to recognize --help as a distinct path). This classifier fix at least makes the error surface typed correctly so consumers can distinguish "parse failure" from "unknown" and potentially retry without the --help flag. Test added: - `classify_error_kind_covers_unexpected_extra_args_171` (4 positive cases + 1 sanity guard) Tests: 226/226 pass (+1 from #171). Typed-error family: #121, #127, #129, #130, #164, #169, #170, #247.