ADR-0015 and commit 414beb8 document that the wake-time restore (getWebSockets(SYNC_TAG) in the mixin constructor, mixin.ts:171) has no automated coverage: @cloudflare/vitest-pool-workers gained evictDurableObject/evictAllDurableObjects (graceful evict, storage preserved, WebSockets hibernated not closed) only in 0.16.20, which requires vitest@^4, while the repo pins 0.12.21 / vitest 3.2.4.
Request: bump vitest to 4.x and vitest-pool-workers accordingly, then add a test that (1) opens a sync socket, (2) evicts the DO, (3) performs a server write on the reconstructed instance, and (4) asserts the pre-eviction client still receives the delta — pinning the last code-read-only path in the hibernation story. Long-lived production sockets (hours-idle agent sessions) ride this path constantly.
Related documented gap (ADR-0009:182-188): mid-tick eviction with coalescer-buffered deltas plus a surviving hibernatable socket can silently skip a delta batch (appliedSeq has no contiguity check) — the eviction test rig would also enable pinning that.
ADR-0015 and commit 414beb8 document that the wake-time restore (getWebSockets(SYNC_TAG) in the mixin constructor, mixin.ts:171) has no automated coverage: @cloudflare/vitest-pool-workers gained evictDurableObject/evictAllDurableObjects (graceful evict, storage preserved, WebSockets hibernated not closed) only in 0.16.20, which requires vitest@^4, while the repo pins 0.12.21 / vitest 3.2.4.
Request: bump vitest to 4.x and vitest-pool-workers accordingly, then add a test that (1) opens a sync socket, (2) evicts the DO, (3) performs a server write on the reconstructed instance, and (4) asserts the pre-eviction client still receives the delta — pinning the last code-read-only path in the hibernation story. Long-lived production sockets (hours-idle agent sessions) ride this path constantly.
Related documented gap (ADR-0009:182-188): mid-tick eviction with coalescer-buffered deltas plus a surviving hibernatable socket can silently skip a delta batch (appliedSeq has no contiguity check) — the eviction test rig would also enable pinning that.