Summary

This fix resolves the issue where Anthropic prompt caching was not working even when cacheRetention was configured. The problem was that the model config lookup did not handle model aliases (e.g., "sonnet" -> "anthropic/claude-sonnet-4-5") or short keys.

Changes

• Updated resolveExtraParams in extra-params.ts to:
  1. First try exact match with provider/modelId
  2. Then try resolving model alias using parseModelRef
  3. Finally try short key match (just modelId)
• Added debug logging to help identify config lookup issues

Testing

• TypeScript compilation passes
• Config pruning defaults tests pass
• The fix allows cacheRetention to be properly looked up when users configure with model aliases or short keys

Fixes #17537

Greptile Summary

Updated resolveExtraParams to handle model aliases and short keys when looking up cacheRetention config. Previously only exact provider/modelId keys were supported, preventing prompt caching from working when users configured models using aliases like "sonnet" or short keys. The fix adds a fallback chain: exact match → alias resolution via parseModelRef → short key match.

Confidence Score: 5/5

• This PR is safe to merge with minimal risk
• The fix is well-structured with a clear fallback chain, properly uses existing parseModelRef helper, includes debug logging for troubleshooting, and addresses a specific bug without introducing breaking changes or security concerns
• No files require special attention

_{Last reviewed commit: 7432844}