# `pnpm check` blocked by `mongodb.test.ts` `NODE_ENV` assignment

## Summary

`prompts/documentation_ghostwriter_prompt.md` randomly selected the `ideas` module for a documentation pass on April 23, 2026. I drafted a new `src/modules/ideas/README.md`, then ran `pnpm check` as required by both the prompt and `AGENTS.md`.

The run failed during `pnpm typecheck`, so I reverted the README change and logged the blocker instead of landing an unverified documentation update.

## Failure

`pnpm check` failed with these TypeScript errors on current `main`:

```text
src/lib/__tests__/mongodb.test.ts(39,17): error TS2540: Cannot assign to 'NODE_ENV' because it is a read-only property.
src/lib/__tests__/mongodb.test.ts(52,17): error TS2540: Cannot assign to 'NODE_ENV' because it is a read-only property.
src/lib/__tests__/mongodb.test.ts(63,17): error TS2540: Cannot assign to 'NODE_ENV' because it is a read-only property.
src/lib/__tests__/mongodb.test.ts(83,17): error TS2540: Cannot assign to 'NODE_ENV' because it is a read-only property.
```

Lint completed first and reported only pre-existing `@next/next/no-img-element` warnings in unrelated files. The hard blocker for this run was the `typecheck` failure above.

## Proposed Fix

- Update `src/lib/__tests__/mongodb.test.ts` to avoid direct assignment to `process.env.NODE_ENV` in a way that violates the current Node typings.
- Safe options likely include:
  - mutating through a widened env object type for the test setup/teardown
  - wrapping env changes in a helper that preserves and restores `NODE_ENV`
  - replacing direct assignment sites with a typed utility used across tests

## Why I Held Back

- The prompt requires reverting changes if verification fails.
- This run was scoped to one small documentation improvement, not a test infrastructure fix.
- Forcing the README through without a clean `pnpm check` would break the repository’s stated agent workflow.