Module tab 

browser-control tab subcommand: named-tab lifecycle backed by the SQLite tabs table. Commands: tab open, tab list, tab adopt.

• Close is implicit (sweep-on-read evicts stale rows; LRU recycles under budget pressure). Agents don’t know when they’re done.
• Navigate is folded into tab open <browser>/<name> <url>, which navigates the existing tab if url differs from last_url.
• tab adopt binds an unnamed live tab (discovered via tab list --all) to a name so it becomes addressable in page-context commands.

Enums

TabCmd

Functions

run