diff --git a/ROADMAP.md b/ROADMAP.md
index 3f798a0a..a2d9d363 100644
--- a/ROADMAP.md
+++ b/ROADMAP.md
@@ -7820,3 +7820,9 @@ Original filing (2026-04-18): the session emitted `SessionStart hook (completed)
     **Required fix shape.** Treat JSON output mode as a global app-level diagnostic routing contract: local/list/status surfaces that successfully return structured JSON should not write config deprecation prose to stderr. Either collect those warnings into each relevant JSON envelope where a warnings field exists, or suppress config-warning emission during JSON-mode preloading/default resolution for surfaces that cannot represent warnings yet. Preserve human stderr warnings in text mode.
 
     **Acceptance.** With deprecated `enabledPlugins` present, `claw --output-format json plugins list`, `claw --output-format json mcp list`, and `claw --output-format json doctor` exit 0, stdout parses from byte 0, and stderr contains zero `enabledPlugins is deprecated` app-level warning lines. Text mode still prints the warning. [SCOPE: claw-code]
+
+817. **`claw --output-format json plugins list --` writes its JSON error envelope to stderr while sibling local inventory commands use stdout** — dogfooded 2026-05-28 12:30 on `main` `9494e3c26`. Trailing bare `--` is a useful parser edge because automation sometimes injects delimiter sentinels. `agents list --` and `skills list --` return rc 1 with parseable JSON on stdout and empty stderr. `mcp list --` also returns a parseable JSON error on stdout. `config --` returns rc 0 with a structured config error on stdout. But `plugins list --` returns rc 1, stdout empty, and writes the JSON error envelope to stderr: `{"action":"abort","error":"unknown option for `claw plugins list`: --", ...}`. This is machine-readable, but channel-inconsistent and surprising for JSON-mode consumers that read stdout for command payloads.
+
+    **Required fix shape.** Align `plugins list` parse-error routing with the other JSON inventory/local surfaces: in JSON mode, print the structured CLI error envelope to stdout and keep stderr empty for this handled parse error. Preserve text-mode stderr behavior. Add regression coverage for `claw --output-format json plugins list --` asserting rc 1, stdout parseable JSON with `error_kind:"cli_parse"`, and empty stderr.
+
+    **Acceptance.** `claw --output-format json plugins list --` exits 1, stdout parses from byte 0 as the existing JSON error envelope, stderr is empty, and text mode still reports the parse error to stderr. [SCOPE: claw-code]