EXTENSIONS

Provider-agnostic ManageSieve (RFC 5804) client built directly on Deno's native TCP/TLS primitives -- no third-party ManageSieve library exists on npm with any real maintenance signal, so the small line protocol (STARTTLS, SASL PLAIN, and the literal/quoted string framing for LISTSCRIPTS/GETSCRIPT/PUTSCRIPT/SETACTIVE/DELETESCRIPT/CHECKSCRIPT) is implemented in-repo behind a single injectable transport seam. Read-only methods: listScripts, getScript, getActive, checkScript (CHECKSCRIPT without installing). Gated write methods: putScript, setActive, deleteScript -- dryRun defaults true, every write validates via CHECKSCRIPT first (putScript) or a live LISTSCRIPTS snapshot (setActive/deleteScript), and deleteScript refuses to remove the currently-active script. Script names/text are always sent as RFC 5804 non-synchronizing literals ({n+}), which are purely length-prefixed, so no caller-supplied content can ever be interpreted as a protocol boundary.