Which engine process opened this entry (#349), as <hostname>:<pid>.
Null on entries written before the key existed, and on hand-written ones.
The stale sweep is the only reader: an open entry says "an agent is
running", and without a name on it a second engine cannot tell a crashed
process's orphan from another process's live job — it aged both after
staleMs and re-dispatched, putting two agents on one task. With the
name, a sweep ages its own entries (and unnamed ones) on the short
window and another engine's only once no live job could still hold it.
Closed without a process ever spawning (#155): $0, not a failure, not a retry spent.
The harness's own session for this dispatch (#181), when its adapter says how to read one. Adapter-neutral by name because only the adapter knows what a session is; a runner that has none leaves this null.
A retry of the same role+task+round resumes it, so the second attempt starts from what the first had already worked out instead of re-reading the same files. It is a hint, never a handle: a session the harness will not take costs a fresh dispatch and nothing else.
One dispatch, as the ledger spells it. Named for the budget ledger to keep it distinct from
view-model/ledger.ts'sLedgerEntry, which is a parsed commit subject — a different ledger entirely, and both reach the package root.