Pith Number

pith:456F6KSN

pith:2025:456F6KSNSL5OPDRJNF2JUICSJG

not attested not anchored not stored refs pending

HardTests: Synthesizing High-Quality Test Cases for LLM Coding

Aidan Zhang, Dejia Xu, Ivan Bercovich, Jiabao Ji, Junting Zhou, Kexun Zhang, Lei Li, Yee Man Choi, Zhongmou He

arxiv:2505.24098 v1 · 2025-05-30 · cs.CL

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{456F6KSNSL5OPDRJNF2JUICSJG}

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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.

Cited by

6 papers in Pith

The Generalization Spectrum: A Chromatographic Approach to Evaluating Learning Algorithms

CP-Agent: A Calibrated Risk-Controlled Agent for Feedback-Driven Competitive Programming

FrontierSmith: Synthesizing Open-Ended Coding Problems at Scale

VeriContest: A Competitive-Programming Benchmark for Verifiable Code Generation

Receipt and verification

First computed	2026-07-05T11:12:41.854207Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e77c5f2a4d92fae78e2969749a205249b6e6c8508c3068365b8faf8ba798a0c1

Aliases

arxiv: 2505.24098 · arxiv_version: 2505.24098v1 · doi: 10.48550/arxiv.2505.24098 · pith_short_12: 456F6KSNSL5O · pith_short_16: 456F6KSNSL5OPDRJ · pith_short_8: 456F6KSN

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/456F6KSNSL5OPDRJNF2JUICSJG \
  | 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: e77c5f2a4d92fae78e2969749a205249b6e6c8508c3068365b8faf8ba798a0c1

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1091f49d455e8fa9266f5d0db9892c0f60266819d6e1e9c60b09be25d9fc6116",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cs.CL",
    "submitted_at": "2025-05-30T01:00:34Z",
    "title_canon_sha256": "84bbd61baf4c801fefadf5afb69be9ae3cd68892e8935ed3cd580a386dc81cbb"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2505.24098",
    "kind": "arxiv",
    "version": 1
  }
}