## TL;DR
Fix this in scorecard validation agent workflow by acting on the exact message first: constrain scorecard validation to the rule list read from the live scorecard configuration, reject any rule name not in that list, and verify a sample of validated rules against the configuration before signing off the validation. Do not rerun the whole job unchanged, because the same inputs produce the same failure. Prove the fix on one account, batch or record set first, then rerun the full scope and reconcile the counts.

```text
agent hallucinating scorecard rule not in source data for validating the scorecard configuration error hallucination failure
```

## Use this when
- The operation in scorecard validation agent workflow fails with this exact message or symptom: agent hallucinating scorecard rule not in source data for validating the scorecard configuration error hallucination failure.
- The same failure repeats on retry with unchanged inputs.
- Health scoring, alerting or routing is blocked until this item completes.

## Not for this skill when
- The message is an outage notice from the platform. Resolve that first, then return here if this error remains.
- The operation completes and you only disagree with its output quality. That is a quality review, not this failure.

## Steps
1. Reproduce the failure with the smallest scope that still shows it in scorecard validation agent workflow, and copy the full message plus the account, measure or job involved into the run notes. Verify: the error is reproduced on demand with a named scope, not only seen in a log.
2. Apply the specific fix for this error: constrain scorecard validation to the rule list read from the live scorecard configuration, reject any rule name not in that list, and verify a sample of validated rules against the configuration before signing off the validation. Verify: the smallest failing scope now completes, or the named account, measure or job behaves as the fix predicts.
3. Check the neighbouring accounts, measures or jobs that share the same config, schema or source, because this class of failure rarely affects only one item. Verify: the neighbouring items are listed and each is marked affected or clear.
4. Rerun the original operation in scorecard validation agent workflow on the previously failing scope, watching for the same message rather than assuming success from a quiet log. Verify: the operation completes and the original message does not appear.
5. Compare the result counts, scores or status against the source in scorecard validation agent workflow so a silent partial success is caught before sign off. Verify: counts match the source or every difference is named and explained.
6. Record the fix, the triggering input and the verification result on the item so the next occurrence is recognised immediately. Verify: the record names the error, the fix applied and the evidence of success.

## Why it happens
An agent validating from an expected rule pattern invents rules that sound right, and list constrained validation blocks every invented rule.

## Variant phrasings

### agent hallucinating scorecard rule not in source data for validating the scorecard configuration error hallucination failure
The verbatim form searchers paste from the terminal or console. Treat it identically: same fix, same single scope proof, then the full rerun.

### How to fix - agent hallucinating scorecard rule not in source data for validating the scorecard configuration error hallucination failure
The how-to phrasing for the same failure in scorecard validation agent workflow. The steps above apply unchanged; start at the reproduction step rather than skipping to the rerun.

### scorecard validation agent workflow troubleshooting for this failure
The symptom-first phrasing used when the console hides the full message. Surface the full message first, confirm it matches the code block above, then follow the steps.

## Edge cases
- If the fix works on the sample scope but the full rerun still fails, a second account or record with the same fault is present; widen the scope in stages until the next failing item is found.
- If scores change after the fix but downstream alerts or reports do not, check the downstream refresh timing before recalculating again, because those surfaces often read a synced copy.
- If the source information itself is missing for the affected accounts, record that as a source gap rather than scoring the accounts as zero.

Compatibility: scorecard validation agent workflow at current versions, plus the platform API or console the query names; no extra tooling beyond the source system access needed to verify counts.

## Provenance

Resolved from the public thread: https://vectle.com/posts/pst_O3hNORswvds0OGexkIUCWw