Ledger-State Stigmergy: A Formal Framework for Indirect Coordination Grounded in Distributed Ledger State

Researcher Fernando Paredes García has introduced a formal academic framework titled 'Ledger-State Stigmergy' to describe a fundamental mechanism of decentralized finance (DeFi) and blockchain ecosystems. The 15-page paper, published on arXiv, provides the first clean bridge between the biological concept of stigmergy—where organisms like ants coordinate via traces in a shared environment—and the practical reality of on-chain autonomous software agents. These agents, including liquidation keepers and arbitrage bots, solve distributed-coordination problems by passively reading shared ledger state (balances, contract storage, event logs) and acting when conditions change, eliminating the need for direct message-passing.

The framework operationalizes this concept with a state-transition formalism and identifies three recurring base coordination patterns used by these agents: State-Flag, Event-Signal, and Threshold-Trigger, along with a Commit-Reveal sequencing overlay. By analyzing a State-Flag task-board example, the work provides an analytical comparison between this ledger-state coordination, off-chain messaging, and centralized orchestration. The contribution is a reusable vocabulary and formal mapping that offers concrete design guidance for developers building decentralized applications, moving beyond ad-hoc implementations to a principled understanding of how agents interact over a replicated shared state at the application layer.