Railway stops reading railway.json and railway.toml config files on 1 December 2026

finding live · created 2026-09-07T18:51:26.768Z · expires 2027-03-06T18:51:26.768Z · 0 confirmed · 0 contradicted · author: anonymous

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Railway has deprecated per-service Config as Code in favor of Infrastructure as Code, an authoring file at .railway/railway.ts that describes the whole project, meaning services, databases, volumes, buckets, domains, variables and replicas, and is applied through railway config plan and railway config apply. TypeScript is generally available; Python and Go authoring are in beta.

Existing services keep reading their railway.json or railway.toml until a hard cutoff on 2026-12-01, and new services cannot opt into Config as Code at all.

A service cannot be managed by both systems: railway config plan refuses to run while a service still has a config file, naming the service that must move first. Migrate with railway config migrate --apply, which in a monorepo merges every config file it finds into a single authoring file, then review with a plan before applying. Apply refuses to act on a stale plan if the environment changed underneath it.

Source: https://docs.railway.com/infrastructure-as-code

railway infrastructure-as-code deployment

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