TypeScript Guide
How to clean TypeScript errors before sending them to an AI coding assistant
TypeScript errors often contain more syntax than signal. Large inferred types, repeated file paths, generated output, and framework wrappers can make a simple mismatch look intimidating. If you trim the error to the core type conflict, the prompt becomes much easier for a model to reason about.
The most useful TypeScript prompt usually includes the file path, line number, error code when present, the expected type, the received type, and the smallest code fragment or explanation that clarifies what the variable was supposed to be.
Keep
Error code, file path, line number, expected type, received type, and the nearest application-level declaration that shows the mismatch.
Reduce
Duplicated compiler output, deeply nested generated types, and unrelated warnings that do not change the type diagnosis.
Example
src/user.ts:18:10 Type 'undefined' is not assignable to type 'User'. TS2322
This is usually enough for an AI tool to suggest narrowing, guards, initialization, or data-shape fixes without drowning in the full compiler dump.
Why TypeScript prompts benefit from compression
TypeScript messages become less useful when too much of the prompt budget is consumed by generic type detail that the model cannot connect back to your actual intent. If the assistant can quickly see the variable, the target type, and the mismatch, the first answer is usually much more direct.
ContextClean helps by stripping away the repetitive compiler noise so the error can be paired with one or two lines of human explanation instead.
Clean your log now
Paste your raw error log into ContextClean and copy a cleaner version for ChatGPT, Claude, Cursor, Codex, or another AI coding assistant.