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AI · July 17, 2026

SolidState HQ

A deterministic runtime for safe, controllable AI agents

SolidState HQ launched on July 17, 2026 with 11 votes, #1,462 of 24,623 launches that month and more than 90% of that year's launches.

What it does

SolidState is an open-source runtime for building safe and controllable AI agents. It separates probabilistic reasoning from deterministic execution, giving the runtime control over state transitions, tools, approvals, retries, concurrency, persistence, and limits. The alpha release includes FSM workflows, human-in-the-loop policies, parallel tools, checkpointing, StateGraph orchestration, actor-based concurrency, tracing, and multi-model support.

A lightweight, deterministic alternative to LangGraph and LangChain. Build secure, sandboxed runtimes for GenAI agents with strict safety policies, persistent checkpoints, and audit trails.

A high-reliability, lightweight agent state machine runtime. A modular alternative to LangGraph and LangChain built for controllable GenAI agent frameworks and enterprise GenAI DevOps. from solidstate import AgentRuntime, RuntimeState from solidstate.models.openai_model import OpenAIModelAdapter from solidstate.persistence import FileCheckpointer # Initialize runtime with model, checkpointer, and policies runtime = AgentRuntime( model=OpenAIModelAdapter( "gpt-4o" ), tool_registry=registry, policy_evaluator=policy, checkpointer=FileCheckpointer( "checkpoints/" ), tracer=JsonlTracer( "audit.jsonl" ) ) # Run turn-based execution loop state = RuntimeState.new( "Analyze account risk and transfer…from solidstatehq.ai

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