Research NoteOctober 22, 20253 min read

Ephemeral State in Wazero Mounts

Enforcing stateless policy evaluation.

Problem

If an agent's policy script can persist state locally on the filesystem, it becomes stateful and non-deterministic. A subsequent evaluation of the exact same prompt could yield a different result based on hidden local state.

Approach

HELM enforces strictly stateless execution. When the Wazero sandbox is spun up, any required filesystem access operates on a virtual tmpfs RAM disk (ephemeral volume). When the sandbox terminates, the volume is destroyed. Any data the agent wishes to remember must be explicitly proposed and written to the external Memory Plane.

Invariants

  • Read/Write operations inside the Wasm guest map only to temporary RAM blocks.
  • Execution contexts cannot leak state to subsequent contexts.

Artifacts

References

  • WebAssembly System Interface (WASI) spec.

Mindburn Labs Research β€’ October 22, 2025
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Ephemeral State in Wazero Mounts β€” Mindburn Research | Mindburn Labs