KeepState hosts your agent's working environment and checkpoints it, so a supported recovery can resume from the last saved point.
KeepState hosts the agent's working environment. A checkpoint captures the documented guest state so a supported recovery can resume from that point. Recovery starts from a saved checkpoint, not from every unsaved change. Provider-held state and external side effects have separate boundaries.
filesystem
process memory
tool state
one atomic checkpoint
Filesystem, process memory, and tool state are captured in one write, so a restore returns them from the same point in time. Provider-side KV cache is not ours to freeze; what survives is the agent's own memory and world.
A session is a micro-VM we can freeze. The freeze is one write, not three: if the filesystem were captured at t and the process memory at t plus 40 ms, the agent would wake remembering a file that does not exist. (The 40 ms is an illustration of skew, not a measurement.)
Storage is content-addressed: 82 checkpoints of one soak occupied 4,233 MiB against 80,952 MiB naive, a 19.1x dedup, measured once, on one workload. That is why the cadence can be aggressive enough to make a crash boring.
29 July 2026 · laboratory demonstration An agent session was checkpointed and hard-stopped. The saved session resumed; observed downtime was 25.2 seconds. One demonstration, not a recovery-time guarantee.
An editorial summary of a historical result, not a session running now. Dates, scope and limitations are on the walkthrough.
a conversation, not a self-serve step
Book a supervised interruption demo: you type the kill on our bench.
A 30-minute call where you type the kill -9 yourself and watch the session come back with its work intact.
Ask about a recovery walkthroughRAM-only guest resume
measured across soak cycles
Agent session resume
measured (gates 4, 6, 7). No second region exists, so no cross-region number does either.
Kill-and-resume
fresh cycles, Wilson 95% CI [86.7%, 100%]. The claim is the interval, not the point.
Dated public summaries retain the measured resume latency, tested environment and durability limits. record
Create an account, bring a model key, and follow the hosted quickstart.
keepstate.ai · the durable agent session cloud