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arXiv · 2607.23793

Choreographic Programming: a Semantic Approach

Matteo Acclavio·Giulia Manara·Fabrizio Montesi·Xueying Qin
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Abstract

The Endpoint Projection (EPP) theorem is a cornerstone of choreographic programming. It states that every choreography can be projected to a network of processes that correctly implements it. Proving EPP is notoriously difficult, and existing proofs are complex and non-modular because of the mismatch between the global view of choreographies and the local view of processes. In this article, we show how to reconcile this mismatch by designing a new semantics for choreographies that is built on the local view of processes, as well as a new preorder relation between choreographies and networks that extends bisimulation to deal with the propagation of knowledge of choice among distributed processes. As a result, we can give a modular proof of EPP, which is conceptually simpler than existing ones and also provides better insights on the theory of choreographic programming.

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Matteo Acclavio, Giulia Manara, Fabrizio Montesi, Xueying Qin. 2026-07-26. Choreographic Programming: a Semantic Approach. https://arxiv.org/abs/2607.23793

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