Document mcp show missing status contract gap

Constraint: ROADMAP-only dogfood follow-up for 20:30 nudge on rebuilt claw git_sha ee41b266

Rejected: implementation change to MCP show status schema; request was one concrete follow-up if no backlog item
Confidence: high after bounded successful repro
Scope-risk: narrow
Directive: Replaces invalid hang/nondeterminism PRs with verified status contract gap
Tested: cargo run --manifest-path rust/Cargo.toml --bin claw -- version --output-format json; ./rust/target/debug/claw mcp show does-not-exist --output-format json; git diff --check; scripts/fmt.sh --check
Not-tested: runtime behavior change, because this commit only documents the gap

ROADMAP.md

@@ -6286,3 +6286,4 @@ Original filing (2026-04-18): the session emitted `SessionStart hook (completed)
 344. **Resume-safe `/config help --output-format json` is treated as an unsupported config section instead of a structured config-section discovery surface** — dogfooded 2026-04-29 for the 18:30 nudge on current `origin/main` / rebuilt `./rust/target/debug/claw` with embedded `git_sha` `a510f734`. Running `./rust/target/debug/claw --resume latest /config help --output-format json` wrote no stdout bytes and emitted stderr JSON: `{"command":"/config help","error":"Unsupported /config section 'help'. Use env, hooks, model, or plugins.\n  Usage            /config [env|hooks|model|plugins]\n\n/config\n  Summary          Inspect Claude config files or merged sections\n  Usage            /config [env|hooks|model|plugins]\n  Category         Config\n  Resume           Supported with --resume SESSION.jsonl","type":"error"}`. The same shape appears for natural discovery forms such as `/config list` and `/config show`, while bare `/config --output-format json` succeeds and returns config-file data. The config surface is therefore resume-supported, but its section discovery/help path is only available as a human-formatted error string on stderr, with no structured `sections[]`, no `help` alias, and no typed `unsupported_section` metadata. This is distinct from #342's missing slash-command index and #343's dead-end suggestion: the pinpoint is a command-specific subcommand/section discovery contract for an otherwise working resume-safe command. **Required fix shape:** (a) make `/config help` or `/config sections` resume-safe and return stdout JSON containing supported sections such as `env`, `hooks`, `model`, and `plugins`; (b) for unsupported config sections, emit a typed JSON envelope with `kind:"error"` or equivalent plus `code:"unsupported_config_section"`, `section`, and structured `supported_sections[]`; (c) keep human usage text optional, not the only machine-readable recovery path; (d) add regression coverage proving `/config help --output-format json` or its canonical replacement exposes structured section metadata and that `/config list`/`show` errors include structured supported-section guidance. **Why this matters:** config inspection is a control-plane surface. Claws should not have to intentionally trigger an error and scrape prose to learn which config sections can be inspected under `--resume`; section discovery needs the same machine-readable contract as the config payload itself. Source: gaebal-gajae dogfood follow-up for the 18:30 nudge on rebuilt `./rust/target/debug/claw` `a510f734`.
 345. **Resume-safe `/config env|hooks|model|plugins --output-format json` accepts different section names but returns the same generic config-file summary for every section** — dogfooded 2026-04-29 for the 19:00 nudge on current `origin/main` / rebuilt `./rust/target/debug/claw` with embedded `git_sha` `a510f734`. Running `./rust/target/debug/claw --resume latest /config env --output-format json`, `/config hooks`, `/config model`, and `/config plugins` all wrote stdout JSON successfully and no stderr, but each response had the same top-level shape and values: `kind:"config"`, `cwd`, `files[]`, `loaded_files:1`, and `merged_keys:1`. None of the outputs included the requested `section`, section-specific keys, hook/model/plugin/env data, `section_missing`, `section_empty`, or truncation metadata; the `env`, `hooks`, `model`, and `plugins` arguments appear to be accepted while producing an indistinguishable generic config summary. This is distinct from #344's missing config-section discovery/help path: the pinpoint here is that the advertised section-specific entrypoints do not produce section-specific machine-readable payloads once invoked. **Required fix shape:** (a) include a `section` field in `/config <section> --output-format json` responses; (b) return section-specific structured payloads for `env`, `hooks`, `model`, and `plugins`, with explicit empty/missing states when applicable; (c) preserve the config-file provenance summary separately from the requested section content so callers can tell what was inspected; (d) add regression coverage proving the four supported sections produce distinguishable JSON contracts and do not silently collapse to the bare `/config` summary. **Why this matters:** config inspection is used to diagnose model, hook, plugin, and env lifecycle issues. If every supported section returns the same generic file list, claws cannot tell whether a section is empty, unsupported, redacted, or simply ignored, and config troubleshooting remains prose/error archaeology instead of structured state inspection. Source: gaebal-gajae dogfood follow-up for the 19:00 nudge on rebuilt `./rust/target/debug/claw` `a510f734`.
 346. **Top-level `agents show <name> --output-format json` accepts a natural agent-detail request but falls back to generic help JSON instead of returning the selected agent or a typed unsupported-detail error** — dogfooded 2026-04-29 for the 20:00 nudge on current `origin/main` / rebuilt `./rust/target/debug/claw` with embedded `git_sha` `c6c01bea`. Running `./rust/target/debug/claw agents list --output-format json` returned a valid stdout JSON inventory with `kind:"agents"`, `action:"list"`, and an `agents[]` entry named `analyst`. Immediately running `./rust/target/debug/claw agents show analyst --output-format json` returned success on stdout but did not return the `analyst` detail object; instead it returned generic help-shaped JSON: `{"action":"help","kind":"agents","unexpected":"show analyst","usage":{"direct_cli":"claw agents [list|help]","slash_command":"/agents [list|help]",...}}`. Both stderr streams were empty. The command therefore accepts a natural detail-inspection spelling, recognizes it only as `unexpected`, and hides the absence of an agent-detail surface behind a successful help fallback rather than a typed `unsupported_agents_action` / `agent_detail_unavailable` error. This is distinct from #328 and #329: those cover source/provenance mismatch and slash `/agents` inventory flattening, while this pinpoint is the missing top-level agent detail/inspection contract after inventory discovery succeeds. **Required fix shape:** (a) either implement `agents show <name> --output-format json` returning the selected agent's structured fields and provenance, or return a non-success typed JSON error with `code:"unsupported_agents_action"`, `requested_action:"show"`, and `supported_actions:["list","help"]`; (b) include `agent_name` and whether the name exists in the current inventory when rejecting detail inspection; (c) avoid `action:"help"` success envelopes for unsupported subcommands because they make failed detail inspection look like intentional help output; (d) add regression coverage proving `agents show analyst --output-format json` does not silently collapse to generic help when `analyst` exists in `agents list`. **Why this matters:** claws discover agents first, then need to inspect a chosen agent before delegation. If the natural detail command returns successful generic help instead of a selected-agent payload or typed unsupported-action error, automation cannot distinguish typo, unsupported detail view, missing agent, or successful help request without comparing unrelated inventory output. Source: gaebal-gajae dogfood follow-up for the 20:00 nudge on rebuilt `./rust/target/debug/claw` `c6c01bea`; earlier false hang hypotheses for `mcp help` and `agents list` were closed after bounded repros succeeded.
+347. **Top-level `mcp show <missing-server> --output-format json` reports a missing server as `status:"ok"` instead of a typed not-found/error status** — dogfooded 2026-04-29 for the 20:30 nudge on current `origin/main` / rebuilt `./rust/target/debug/claw` with embedded `git_sha` `ee41b266`. After rebuilding and verifying the binary provenance, running `./rust/target/debug/claw mcp show does-not-exist --output-format json` returned stdout JSON with `{"action":"show","config_load_error":null,"found":false,"kind":"mcp","message":"server `does-not-exist` is not configured","server_name":"does-not-exist","status":"ok"}` and no stderr. `found:false` is useful, but pairing it with `status:"ok"` makes the command-level outcome ambiguous: a missing requested server is not an OK inspection result for automation that needs to distinguish successful detail retrieval from a not-found lookup. This is distinct from #327's MCP source-list mismatch and the invalid #2874/#2879/#2880 hang/nondeterminism hypotheses that were closed after bounded repros. **Required fix shape:** (a) return a typed not-found status such as `status:"not_found"` or `kind:"error"` plus `code:"mcp_server_not_found"` while preserving `server_name` and optional `available_servers[]`; (b) document whether `found:false` objects are considered success or error and keep that convention consistent across text and JSON modes; (c) ensure process exit semantics match the JSON status contract or expose a separate `exit_ok`/`lookup_status` field; (d) add regression coverage proving missing-server lookup is distinguishable from successful server detail retrieval without parsing the human `message`. **Why this matters:** MCP inspection is a control-plane diagnostic. If a missing server returns `status:"ok"`, claws can silently treat a failed lookup as healthy MCP state unless they special-case `found:false`, which defeats the purpose of a clear machine-readable status field. Source: gaebal-gajae dogfood follow-up for the 20:30 nudge on rebuilt `./rust/target/debug/claw` `ee41b266`.