The section "recover() change, for a design read" covers three things, with
file:line against aca16404c. Every leftover is still bound and ended as
host-lost, and a survivor only refuses legacy-run-live while it lives. The
5 s wait applies only in the bwrap kill branch. No old test's expected value
changes. The fallback is to revert to the base recover() and leave the
refusal untested. The survivor log line now names the outer and runner pids
so an operator can clear it, and the new test's log assertion matches.
recover() kept a survivor only when a bwrap outer pid outlived SIGKILL, so
the Q2 refusal (BUILD.md:177-179, t1-sessions.md:109) had no test. A leftover
whose runner still ran after its outer pid was gone was ended and dropped.
Now recover() waits on the outer pid and the runner, keeps any leftover where
either still runs, and logs that it still runs. check() reads only the
survivors that still run.
session-launch.test.mjs adds a test where a sessionless leftover's runner is
a sleep child and its outer pid is gone. It asserts the legacy-run-live
refusal with no launch and no session workspace, then one launch once the
child exits. BUILD.md adds mutants M10-M12 and replaces the "no test" note.
threadsState gives one row per session with `session` and `legacy`; threadIdle
idles a run against its bound session. Each session gets its own store
(threads/<b>/<t>/sessions/<s>/, or the thread's old store for a legacy-3l
session) and its own workspace (session-workspaces/<b>/<i>/<s>/), held by an
O_EXCL <ws>.lock from before the clones to the run's proven exit. A legacy
session's workspace binds in-sandbox at the old instance path. sessions.json
is v2 and reads v1. New tests: cli session-launch.test.mjs, seat
session-workspace.test.mjs. Not yet run: tests wait for Sage's CLEAR.
Two old assertions change as exact updates:
- mos-1285: end-launch.test.mjs threadsState deepEqual. The old row shape was
{ thread: 'th-1', instance: 'coder', pending: 0, unread: 0, lastMessage: null,
lastOpen: '2026-10-15T00:00:01.000Z', lastClaim: null, holder: null }; the
row keeps every key and value and adds session: 'th-1', legacy: true.
- mos-1289: thread-launch.test.mjs:182, old line
`const store = join(f.dataRoot, "threads", "acme", A);`
now reads A's default session id from threadsState's `session` key; :183-185
unchanged; one added assert that threads/acme/<A>/session is absent.
jason.woltje