I got a debug from antigravity
It was a bit of both—a conflict between the Appwrite SDK and the Next.js build environment (specifically when using Turbopack ).
Here is the breakdown of why it failed:
-
The SDK Dependency
The Appwrite Web SDK uses a library called json-bigint internally. This library is used to safely convert query objects (like Query.limit(10)) into JSON strings while ensuring large numbers (BigInts) don't lose precision.
-
The Failing Check
Inside that json-bigint library, there is a technical check that looks like this:
if (value instanceof BigNumber) { ... }
This check is designed to see if a value is a high-precision number.
- The "Causal" Conflict
In the Next.js environment (specifically the way it bundles modules), the
BigNumber
constructor was not being correctly identified as a "callable function" by the time it reached that specific line in the SDK.
When JavaScript sees x instanceof Y, it expects Y to be a constructor (a class or function). Because of a module resolution glitch during the build process,
BigNumber
was essentially "empty" or not recognized as a function, which triggered the error:
TypeError: Right-hand side of `instanceof` is not callable
Why the Fix Works
The SafeQuery helper I wrote simply skips the SDK's broken stringification logic. Instead of giving the SDK an object and asking it to stringify it (which triggers the crash), we give it the exact JSON string it expects:
'{"method":"limit","values":[10]}'
By providing the final product directly, we bypassed the line of code in the SDK that was crashing. This is a common workaround for SDK-level bundling issues in modern frameworks like Next.js.