impacc

impacc is an AI consulting firm specializing in building durable agent runtimes and infrastructure. They integrate agent harnesses with workflow engines like Temporal to ensure systems resume correctly after crashes. Their services include harness and runtime engineering, production reliability, and deterministic interpreters for model-authored programs.

The firm targets clients needing long-horizon agents that must run for hours rather than seconds. They help organizations where systems face crashes, rolling deploys, provider outages, or network partitions. Their approach ensures every tool call and subagent is recorded, retried, and replayed correctly.

Clients can start by booking an intro call to discuss their specific agent infrastructure needs. The firm is open to conversations about systems that already fall over in interesting ways or those requiring long-duration execution. They emphasize that both scenarios are good starting points for a collaboration.

impacc builds agent loops specifically on durable execution runtimes using Temporal. They treat tool calls as activities and subagents as child workflows within this architecture. This structure allows the system to resume at the exact step where a crash occurred instead of restarting from step one.

Their harness and runtime engineering involves programmatic tool calling and recursive subagent trees. They also utilize sandboxed execution surfaces, ranging from embedded interpreters to determinism-hardened V8 isolates. These primitives are designed to converge on the frontier of harness capabilities built directly into the client stack.

Production reliability covers failure taxonomies, retry and idempotency contracts, and cancellation semantics. They also implement replay-correct state recovery and test matrices that exercise all components without burning model calls. This unglamorous work is critical for deciding whether agents successfully ship to production.

The name impacc is described as a Meta inside joke derived from saying 'impact' fast and often. The company states that impact is the only metric that matters, even though they dropped the 't' from the word. This branding choice reflects their focus on measurable outcomes over vibes.

impacc emphasizes that workflows require rigor similar to distributed systems with event histories and retry policies. They argue that opaque sandbox calls can swallow durability guarantees, so granular activity boundaries are essential. Getting these boundaries right is presented as the core work of their engineering.

Their recent technical work includes deterministic interpreters designed specifically for model-authored programs. They also focus on V8 isolate hardening to ensure replay-correct execution during long-running agent sessions. These tools allow agents to step through code deterministically even after interruptions.

The firm states that everything on their site comes from systems running in production, not just theory. They have shipped durable agent runtimes on Temporal using both Python and TypeScript. This hands-on experience forms the basis of their consulting methodology.

You can reach impacc by e-mail at [email protected].

The official website of impacc is impacc.io.

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