lasso self-identity

If you were spawned by lasso, you are running
inside a herdr pane that lasso created, and your own identity is already in your
environment. You do not need to call list_repos / list_agents and guess
which entry is you — that wastes tokens. Read your pane id from the env instead.

Your environment variable

Check whether you're a lasso agent at all by testing HERDR_PANE_ID:

echo "$HERDR_PANE_ID"   # empty/unset => you are NOT in a lasso-managed herdr pane

Closing yourself when you're done

The easiest way to shut yourself down is the CLI — it reads $HERDR_PANE_ID for
you, so there's nothing to pass:

lasso closeme

That tells the running lasso server to kill your agent process and close your
pane (the same soft-close the UI and the close_agent MCP tool perform). This
works even when you were spawned by a lasso on a different machine: the local
server finds the owning record on its peer and closes your pane locally. If the
server runs on a non-default port, set LASSO_LISTEN=host:port — it must stay
an address of the machine you run on.

Acting on yourself via the lasso MCP tools

The lasso MCP server runs inside lasso's own process, not your shell, so it
cannot read your environment — you must pass $HERDR_PANE_ID yourself.

• whoami — pass $HERDR_PANE_ID as pane_id to get your own agent record,
  including your agent id.
• close_agent — call with the id whoami returned (its agent_id) to
  shut yourself down (the long-hand of lasso closeme).

If $HERDR_PANE_ID is empty, you are not running under lasso and none of this
applies to you.