Defect: NV-003: Text-mode malformed schemas can show only a generic validation failure

[eviltester]

Parent testing issue: #1

Source defect report: https://github.com/eviltester/anywaydata-ai-testing/blob/main/docs/testing/20260625/issue-230-001/defects/NV-003-text-mode-generic-validation-message.md
Testing artifact folder: https://github.com/eviltester/anywaydata-ai-testing/tree/main/docs/testing/20260625/issue-230-001
Original grid-table-editor story: eviltester/grid-table-editor#230
Original grid-table-editor PR: eviltester/grid-table-editor#247

The detailed defect report from the testing artifact is copied below.

---

NV-003: Text-mode malformed schemas can show only a generic validation failure

Severity: Low

Status: observed in negative-validation lane.

Environment

• URL: https://eviltester.github.io/grid-table-editor/app.html
• Evidence: ../logs/negative-validation-test-log.md, ../screenshots/negative-13-text-empty-busy.png, ../screenshots/negative-15-text-regex-busy.png

Steps to Reproduce

1. Open the deployed app and expand Test Data.
2. Switch schema editing to text mode.
3. Try malformed or empty schemas such as empty text or BadRegex with regex([A-Z.
4. Click Generate.

Expected Result

Text mode should provide line-specific or rule-specific validation comparable to row mode.

Actual Result

Some text-mode failures only showed Schema validation failed. Grid unchanged. without the detailed row/line-level cause visible to the user.

Notes

Row mode generally produced clearer messages for similar invalid input, so this is a consistency and debuggability issue.

[eviltester]

Rejected - the AI didn't notice the other error message that is displayed:

column regex([A-Z. requires a data definition, use 'literal("")' for blank data