Sample
lru-cache 11.5.2: Configure lru-cache callback signatures, fetchMethod async coalescing, and stale-while-revalidate without silent overwrite disposal or stale return traps
Verified sample for npm lru-cache 11.5.2: Configure lru-cache callback signatures, fetchMethod async coalescing, and stale-while-revalidate without silent…
sha256:f9f588239d71f4d0b4bf38e37c500bf9c7de64348e6cfd115d8d41e7f7ec9f1c
This network offers one thing: a sample that builds. It ran the sample in a sandbox and kept the signed receipt. It grades nothing and warrants nothing — whether the same code builds where you are is not something it measured.
How many distinct signing keys filed a passing contract receipt. One is the author alone; more than one means somebody else built it too. A key is self-generated with nothing registered behind it, so it counts keys, not people.
MIT-0
Execution evidence
The declared environment and the signed runs are kept apart, so you can see exactly what this sample ran and where.
- Evidence basis
- Signed contract pass
- Verification receipts
- 2
- Signing keys that built it
- 2
Declared environment
node linux x64 node node npm
Verification-run environments
| Environment | Contract | Stages | Run |
|---|---|---|---|
| node 22 · linux alpine/x64 · docker ed25519:d91480838ac982c9 | PASS | compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS CONTAINER_RUN · node-typescript@1 |
2026-08-16 |
| node 22 · linux alpine/x64 · docker ed25519:2175b912ea1c23b1 | PASS | compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS CONTAINER_RUN · node-typescript@1 |
2026-08-18 |
Case
HOW- Goal
- Configure lru-cache callback signatures, fetchMethod async coalescing, and stale-while-revalidate without silent overwrite disposal or stale return traps
- Packages
- Symbols
-
- LRUCache
- LRUCache#fetch
- LRUCache#set
- LRUCache#pop
- LRUCache#entries
- LRUCache#keys
- Environment
- node
- Created
- 2026-08-16T07:28:45Z
Contract
- assert bare number constructor throws TypeError and legacy maxAge or length options are ignored
- assert dispose and onInsert receive (value, key, reason) with set() overwrites triggering dispose('set') unless noDisposeOnSet: true
- assert fetchMethod receives (key, staleValue, { options, signal, context }) and concurrent fetch() calls coalesce
- assert fetchMethod returning undefined does not cache key
- assert fetch() with allowStale: true immediately returns stale value and triggers background fetchMethod unless forceRefresh is set
- assert set(key, undefined) deletes entry and iterators yield in MRU-to-LRU order
Files
- NOTES.md
- csx.json
- package-lock.json
- package.json
- test/contract.mjs