Server Warmup Status

:::info[Note] This is a point-in-time snapshot of the API documentation from January 2026. Going forward, we will not be maintaining a public copy of these references, and recommend users to refer to the built-in signature helpers available in the Hack LSP instead for complete and up-to-date information. :::

Returns a (bad) description of the warmup status of the server, based on request-specific state

namespace HH;

function server_warmup_status(): string;

Returns

• string - - If the server appears to be warmed up, returns the empty string. Otherwise, returns a human-readable description of why the server is not warmed up. Note that this function checks a series of heuristics rather than anything definitive; returning '' for one request does not guarantee the same result for subsequent requests.