fix: make help and version successful discovery

docs/adr/0003-default-to-json-everywhere.md

@@ -11,3 +11,10 @@ whether stdout is a terminal or pipe; human-readable presentation requires
 command has the same framing and semantics in every execution environment.
 JSON mode never emits interactive prompts; required confirmation is represented
 as a structured error and satisfied by an explicit flag.
+
+Clap discovery requests are intentionally outside the operation-result
+protocol. Root and subcommand `--help`, plus `--version`, return conventional
+plain UTF-8 text on stdout with status 0 and no stderr. They do not initialize
+the runtime or execute an operation. This narrow exception keeps the CLI
+self-describing for both people and automation agents without weakening JSON
+framing for analysis and cleanup commands.