Pith Number

pith:NC5CQFQ5

pith:2026:NC5CQFQ5CYSZPY7KJZLKFVC7WV

not attested not anchored not stored refs pending

SpecPath: Testing Coding Agents Across Contract-Equivalent Specification Histories

Fangzhen Lin, Haozhe Wang, Huanyu Yang, Jianmin Ji, Yangfan Wu

arxiv:2608.09799 v1 · 2026-08-10 · 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{NC5CQFQ5CYSZPY7KJZLKFVC7WV}

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	2026-08-11T02:25:07.362064Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

68ba28161d162597e3ea4e56a2d45fb54a42f12ebae898498f2a953da9216083

Aliases

arxiv: 2608.09799 · arxiv_version: 2608.09799v1 · doi: 10.48550/arxiv.2608.09799 · pith_short_12: NC5CQFQ5CYSZ · pith_short_16: NC5CQFQ5CYSZPY7K · pith_short_8: NC5CQFQ5

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/NC5CQFQ5CYSZPY7KJZLKFVC7WV \
  | 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: 68ba28161d162597e3ea4e56a2d45fb54a42f12ebae898498f2a953da9216083

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1b921a313c18fd6393df3d82bd7777253d70068f785f0c896e4ece4236c12237",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.SE",
    "submitted_at": "2026-08-10T16:19:00Z",
    "title_canon_sha256": "789743e23ab1896ac9b50e46d68f57a3ec7936943158e7e3e147a79b371eca4c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2608.09799",
    "kind": "arxiv",
    "version": 1
  }
}