697. **`claw plugins remove <name>` silently returns `status:"ok"` with exit 0 when the named plugin does not exist — no `not_found` error, no non-zero exit, no indication the operation was a no-op; sibling: `claw agents <unknown-subcommand>` returns `action:"help"` with exit 0 instead of a typed `unknown_subcommand` error** — dogfooded 2026-05-25 on `63a5a874`. Reproduction: `claw plugins remove nonexistent-plugin --output-format json </dev/null` returns `{"kind":"plugin","action":"remove","status":"ok","error":null,...}` and exits 0. No plugin named `nonexistent-plugin` exists. A caller cannot distinguish "plugin was successfully removed" from "plugin was never there" — both produce the same `status:"ok"` envelope. Sibling: `claw agents stop nonexistent-agent --output-format json </dev/null` returns `{"kind":"agents","action":"help","unexpected":"stop nonexistent-agent",...}` and exits 0 — unknown subcommand falls through to help output rather than a typed error with exit 1. **Required fix shape:** (a) `plugins remove` must check whether the named plugin exists before reporting success; emit `{"kind":"plugin","action":"remove","status":"error","error_kind":"plugin_not_found","plugin_name":"<name>"}` with exit 1 when the plugin is absent; (b) `agents <unknown>` must emit `{"kind":"agents","action":"error","error_kind":"unknown_subcommand","subcommand":"<token>","supported":["list","help"]}` with exit 1 instead of falling back to help output with exit 0; (c) add regression tests proving both paths exit 1 with typed error envelopes. **Why this matters:** idempotent-but-silent remove is fine for infrastructure tools with explicit idempotency contracts; claw has no such contract, and `status:"ok"` for a name-miss means automation cannot audit whether a remove actually ran vs was a no-op. Source: Jobdori dogfood on `63a5a874`, 2026-05-25.
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