Agent session library

Single-writer session actors, immutable prompt/workspace revisions, runtime builders, workers, subscriptions, quotas and transitions. Commit state through the actor; keep blocking work outside it.

Administration constructs detached reset/rebuild/upgrade candidates. Commit prepared candidates through Session_actor.commit_administration, which rechecks authority/revision/lifecycle and retains the previous state before replacement. See archive storage and operator initializer restrictions.

See embedding, protocol and the implementation specification. Public interfaces are the exact callable API; the table below is the complete module inventory for this library. Follow each interface for preconditions, resource ownership, return types and cancellation/error behavior.

Module	Interface	Implementation
active_calls	contract	source
administration	contract	source
chatmd_export	contract	source
compaction_archive	contract	source
durable_event_log	contract	source
history_codec	contract	source
history_id_source	contract	source
live_event_buffer	contract	source
mailbox	contract	source
memory_backend	contract	source
operation_worker	contract	source
permission_policy	contract	source
permission_reviewer	contract	source
prompt_catalog	contract	source
prompt_definition	contract	source
prompt_revision	contract	source
prompt_revision_builder	contract	source
quota_key	contract	source
quota_manager	contract	source
runtime_builder	contract	source
runtime_paths	contract	source
security_grant	contract	source
session_actor	contract	source
session_delta	contract	source
session_persistence	contract	source
session_state	contract	source
session_transition	contract	source
start_queue	contract	source
subscriber	contract	source
turn_worker	contract	source
workspace_catalog	contract	source
workspace_cleanup	contract	source
workspace_definition	contract	source
workspace_instance	contract	source
workspace_lease	contract	source
workspace_resolver	contract	source