Pith Number

pith:HJGG4FJU

pith:2026:HJGG4FJUMZX4IQJTRCR5LJEEXS

not attested not anchored not stored refs pending

CacheRAG: A Semantic Caching System for Retrieval-Augmented Generation in Knowledge Graph Question Answering

Lei Chen, Yushi Sun

CacheRAG adds semantic caching to turn stateless LLM planners for knowledge graph questions into continual learners.

arxiv:2604.26176 v2 · 2026-04-28 · cs.DB · cs.CL

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\usepackage{pith}
\pithnumber{HJGG4FJUMZX4IQJTRCR5LJEEXS}

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Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Claims

C1strongest claim

CacheRAG significantly outperforms state-of-the-art baselines (e.g., +13.2% accuracy and +17.5% truthfulness on the CRAG dataset).

C2weakest assumption

That the three proposed design principles (schema-agnostic ISR interface, MMR-based diversity retrieval, and bounded heuristic expansion) can be realized without introducing new failure modes or requiring extensive manual tuning of cache policies.

C3one line summary

CacheRAG turns stateless LLM planners for KGQA into continual learners via schema-agnostic parsing, diversity-optimized hierarchical caching, and bounded subgraph expansion, yielding up to 13.2% accuracy gains on benchmarks.

Cited by

1 paper in Pith

When Classic Cache Policies Fail: Learning-Augmented Replacement for Semantic Retrieval Buffers

Receipt and verification

First computed	2026-06-02T03:04:41.614720Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3a4c6e1534666fc4413388a3d5a484bc93ceb7d5005e3a57b56fcced13688210

Aliases

arxiv: 2604.26176 · arxiv_version: 2604.26176v2 · doi: 10.48550/arxiv.2604.26176 · pith_short_12: HJGG4FJUMZX4 · pith_short_16: HJGG4FJUMZX4IQJT · pith_short_8: HJGG4FJU

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/HJGG4FJUMZX4IQJTRCR5LJEEXS \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: 3a4c6e1534666fc4413388a3d5a484bc93ceb7d5005e3a57b56fcced13688210

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7f51c31b076311b5f7d212ffdc33cba645f714ba68c406cac031304497eba5fb",
    "cross_cats_sorted": [
      "cs.CL"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cs.DB",
    "submitted_at": "2026-04-28T23:46:47Z",
    "title_canon_sha256": "7c173da619f0326e1d6aa8b3673b563e48c83d3268af691926e8ca026385a46e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2604.26176",
    "kind": "arxiv",
    "version": 2
  }
}