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[theg1239]

spent a lot of water and tokens to review your slop

Greptile Summary

This PR updates PDF buffer cache eviction to cancel unused downloads.

• Adds a shared cache-entry eviction helper.
• Aborts evicted downloads that have no listeners.
• Uses the helper while trimming the cache.

Confidence Score: 5/5

This looks safe to merge.

No blocking issues were found in the changed code. Entries with active listeners continue downloading, and deleting or aborting an already settled entry is harmless.

T-Rex Logs

What T-Rex did

• Reviewed the general-contract-validation-proof and examined pdf-cache-eviction-01-before.log to observe that the parent revision leaves an evicted listener-free preload running and fails the expected-abort assertion.
• Validated the after-state by inspecting pdf-cache-eviction-02-after.log and confirming the head records exactly one abort for the oldest listener-free request and passes.
• Verified the active-listener before/after captures show zero aborts, successful completion, progress notification, and safe unsubscribe.
• Acknowledged that the reusable TypeScript harness and the parent-revision implementation snapshot are included to enable reproduction.

_{Ran code and verified through T-Rex}

Important Files Changed

Filename	Overview
lib/pdf/pdf-buffer-cache.ts	Centralizes cache eviction and aborts listener-free downloads when they are evicted.

_{Reviews (1): Last reviewed commit: "Merge pull request #461 from ACM-VIT/cur..." | Re-trigger Greptile}

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Project	Deployment	Actions	Updated (UTC)
examcooker-dev	Error		Jul 12, 2026 11:37am