[rudycelekli]

Summary

Reuse a complete image-generation batch instead of requesting it again. With --n 2, generation writes numbered PNGs, but the cache lookup checks the unnumbered path. A repeat request therefore misses its existing images and can make another provider request.

Check each expected numbered output, stop at the first missing file, and return the same path/paths shape as fresh generation. Explicit output still requires matching request metadata; partial batches and --force still bypass the cache. The lookup allocates only for files actually present.

Validation

The same portable tests invoke the actual CLI: unchanged main has two cache failures and four passing controls; this patch passes all six. Coverage includes default and explicit outputs, actual cached PNG content, single images, partial batches, mismatched metadata, force bypass, and a billion-image cache miss under a 32 MiB heap limit. Provider keys are removed from test processes; no generation requests or paid calls were made.

Required local reference checks (101 files), all 50 theme validations, index regeneration without a diff, and diff hygiene pass. The regression runs in the existing Node 20 verify workflow. Local runtime was Node 22; hosted CI is pending and Vercel may separately require team authorization.

Checked all 67 current/historical PRs and cache/imagegen issue overlap. Prepared with AI assistance under the account owner's direction and independently reviewed. Maintainer review and merge remain pending.

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