Stop drawing the graph: reactive agents over versioned artifacts

Stop drawing the graph: reactive agents over versioned artifacts Most agent frameworks make you draw the graph : connect nodes, wire memory, declare control flow. But a knowledge problem is not a workflow. Take a realistic question: "Why did infrastructure costs increase in Q2?" The answer may need Confluence docs, GitLab merge requests, CSV spend data, a calculation, source verification — and a clarifying question. The next question needs a different path. There is no universal graph here, and asking a developer to draw one for every possible question is asking them to predict the future. So we built an agent runtime where you don't describe execution at all . You describe what artifacts exist and what agents can do with them; the runtime derives what runs next from state changes. Agents react to events. There is no graph and no node pipeline. This is ctxloom — a reactive, artifact-driven agent runtime, now open source. What it looks like The whole loop is: create an artifact → agents react → one atomic patch → context advances . A knowledge question — say, "how much does GPU inference cost?" — becomes a chain of typed artifacts: UserQuery → TypedDoc → Evidence → Claim → Answer . Each is produced by an agent that reacts to the previous artifact. No graph describes this chain; it falls out of what each agent consumes and produces. ARTIFACT CREATED / UPDATED │ ▼ AGENTS REACT ──self.effects──► Effects ──compile──► Patch ▲ │ └──────────────────────────────────────────────────────┘ Context v+1 The event that wakes an agent is derived from that same change — the causal chain can never drift from the actual state. from pydantic import BaseModel from ctxloom import Budget , Consume , Context , Runtime , RuntimeResources , create_agent , produce , structured_llm class Question ( BaseModel ): text : str class FindingBody ( BaseModel ): text : str class Finding ( BaseModel ): text : str source : str class Conclusion ( BaseModel ): text : str @produce ( Finding ) async def ana