Pith Number

pith:UVJFA4LO

pith:2025:UVJFA4LO3KNBXOAWDX5MF2EVBH

not attested not anchored not stored refs pending

Hamster: A Large-Scale Study and Characterization of Developer-Written Tests

Alessandro Orso, Nate Levin, Raju Pavuluri, Rangeet Pan, Saurabh Sinha, Tyler Stennett

arxiv:2509.26204 v2 · 2025-09-30 · cs.SE

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{UVJFA4LO3KNBXOAWDX5MF2EVBH}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

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.

Receipt and verification

First computed	2026-05-26T02:03:56.029827Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a55250716eda9a1bb8161dfac2e89509ffc808484075704a01d31e66ea320088

Aliases

arxiv: 2509.26204 · arxiv_version: 2509.26204v2 · doi: 10.48550/arxiv.2509.26204 · pith_short_12: UVJFA4LO3KNB · pith_short_16: UVJFA4LO3KNBXOAW · pith_short_8: UVJFA4LO

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/UVJFA4LO3KNBXOAWDX5MF2EVBH \
  | 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: a55250716eda9a1bb8161dfac2e89509ffc808484075704a01d31e66ea320088

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "12e7816ff952e4ab33f8f75c17df925412cce93446bc040e14c968ae9e5bdbf8",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by-nc-nd/4.0/",
    "primary_cat": "cs.SE",
    "submitted_at": "2025-09-30T13:08:23Z",
    "title_canon_sha256": "7ea7da19b77ed367af6a4f431b73cb45ace84f4a4e4bd251b4d925059d84141d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2509.26204",
    "kind": "arxiv",
    "version": 2
  }
}