TypeScript compile or type-check failure

What this failure means

The TypeScript compiler rejected the code because a type, symbol, or module import does not match the project’s declared types.

Symptoms

Faultline looks for one or more of these log fragments:

error ts
tsc:
type 'string' is not assignable to type
property does not exist on type
cannot find name
compilation complete. watching for file changes

Diagnosis

The TypeScript compiler rejected the code because a type, symbol, or module import does not match the project’s declared types.

Fix steps

1. Run tsc --noEmit locally to reproduce the failing diagnostic with the same config.
2. Inspect the first TypeScript error in the log and update the code or type definitions to match.
3. If a generated type file changed, regenerate it before committing.
4. Confirm path aliases in tsconfig.json match the repository layout used in CI.

Validation

• tsc —noEmit

Why it matters

Type errors often appear after API changes, dependency upgrades, or partial refactors where code and type definitions drift out of sync.

Prevention

• Run a dedicated type-check step on every pull request.
• Keep generated client or schema types in sync with the source of truth.
• Avoid broad any escapes that hide drift until a later refactor.

Try it locally

tsc --noEmit
tsc --noEmit

How Faultline detects it

Use faultline explain typescript-compile to see the full playbook.

faultline analyze build.log
faultline explain typescript-compile

Generated from playbooks/bundled/log/build/typescript-compile.yaml. Do not edit directly.