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fix: classify mcp show missing server argument

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bellman
2026-06-03 18:22:23 +09:00
parent 4d3dc5b873
commit f529fb0e55
4 changed files with 91 additions and 6 deletions
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@@ -7901,8 +7901,12 @@ Original filing (2026-04-18): the session emitted `SessionStart hook (completed)
**Acceptance.** `claw --output-format json /commit` hint does NOT mention `--resume`. `claw --output-format json /status` (resume-safe) hint still mentions `--resume`. [SCOPE: claw-code]
830. **`claw mcp show` (missing server name arg) emits `error_kind:"unknown_mcp_action"` instead of `missing_argument`** — dogfooded 2026-05-29 17:00 on `main` `ac5b19de`. `claw --output-format json mcp show` (no server name supplied) exits with `error_kind:"unknown_mcp_action"`. However `show` IS a known MCP action — the error is a missing required argument (server name), not an unknown action. Machine consumers inspecting `error_kind` cannot distinguish "I don't know this action" from "I know this action but a required arg is missing".
830. **DONE — `claw mcp show` (missing server name arg) emits `error_kind:"unknown_mcp_action"` instead of `missing_argument`** — dogfooded 2026-05-29 17:00 on `main` `ac5b19de`. `claw --output-format json mcp show` (no server name supplied) exits with `error_kind:"unknown_mcp_action"`. However `show` IS a known MCP action — the error is a missing required argument (server name), not an unknown action. Machine consumers inspecting `error_kind` cannot distinguish "I don't know this action" from "I know this action but a required arg is missing".
**Required fix shape.** The MCP subcommand parser should detect `show` with no following token and emit `missing_argument: mcp show requires a server name.\nUsage: claw mcp show <server>` with a distinct `error_kind`. Update the classifier arm to return `missing_argument` for this prefix.
**Acceptance.** `claw --output-format json mcp show` exits rc=1, stdout `error_kind:"missing_argument"`, stderr empty. Hint contains usage example. [SCOPE: claw-code]
**Fix applied.** `mcp show` without a server name now emits a typed `missing_argument` response instead of reusing `unknown_mcp_action`. The direct JSON path returns `{kind:"mcp", action:"show", status:"error", error_kind:"missing_argument"}` with a usage hint on stdout and an empty stderr stream; the slash-command parser also classifies `/mcp show` as `missing_argument` via the shared error-kind classifier.
**Verification.** `cargo fmt --manifest-path rust/Cargo.toml --all -- --check`; `cargo test --manifest-path rust/Cargo.toml -p commands mcp -- --nocapture`; `cargo test --manifest-path rust/Cargo.toml -p rusty-claude-cli mcp_show_missing_server_name_returns_missing_argument_830 -- --nocapture`; `cargo test --manifest-path rust/Cargo.toml -p rusty-claude-cli classify_error_kind_returns_correct_discriminants -- --nocapture`; direct probe `cargo run --manifest-path rust/Cargo.toml -q -p rusty-claude-cli -- --output-format json mcp show`.