Module mapping 

Pure translations between Leviath’s own types and the Agent Client Protocol.

Everything here is a total function over plain data - no I/O, no daemon, no async - so the stdio server in leviath-cli is left with only sequencing to do, and every mapping decision is unit-testable in isolation.

Constants

OPTION_ALLOW_ALWAYS

The option id returned when the user approves this tool for the whole session.

OPTION_ALLOW_ONCE

The option id returned when the user approves a single tool call.

OPTION_REJECT_ONCE

The option id returned when the user rejects a tool call.

Functions

flatten_prompt

Flatten a prompt’s content blocks into the single task/message string Leviath agents consume.

is_permission_request

Whether an interaction can be answered over the protocol at all.

parse_region_markers

Parse ---region:<name>--- markers out of a flattened prompt into a name→content map.

permission_request

Build a session/request_permission request from a Leviath tool-approval interaction.

stop_reason_for

The stop reason to report for a run that has reached status, or None while the run has not stopped at all.

stop_reason_for_label

stop_reason_for over the string labels carried by completion events, which report a terminal status by name rather than as a RunStatus. An unexpected label reads as an ordinary end of turn.