Pith Number

pith:4CPPPTH6

pith:2026:4CPPPTH63MCUTIVELJWLXG54ET

not attested not anchored not stored refs pending

SPEAR: Code-Augmented Agentic Prompt Optimization

Cong Feng, Fengyi Li, Guangming Lu, Huimin Han, Mengyin Lu, Shihui Long, Tanvi Motwani, Xiaonan Ding, Yu Sun

arxiv:2605.26275 v1 · 2026-05-25 · 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{4CPPPTH63MCUTIVELJWLXG54ET}

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	2026-05-27T01:05:09.510239Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e09ef7ccfedb0549a2a45a6cbb9bbc24edd477283d4a01ff48727418cdd3606a

Aliases

arxiv: 2605.26275 · arxiv_version: 2605.26275v1 · doi: 10.48550/arxiv.2605.26275 · pith_short_12: 4CPPPTH63MCU · pith_short_16: 4CPPPTH63MCUTIVE · pith_short_8: 4CPPPTH6

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/4CPPPTH63MCUTIVELJWLXG54ET \
  | 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: e09ef7ccfedb0549a2a45a6cbb9bbc24edd477283d4a01ff48727418cdd3606a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b68baa57f7ee6c6884f19874a039c2e9aea703d10f5d2269c1803281d14cca2b",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CL",
    "submitted_at": "2026-05-25T19:01:10Z",
    "title_canon_sha256": "f9570e7061c8ced8fb9af9d52f7c7e0b46b6ebce6cbe58a4d2db66a6c2a0a444"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2605.26275",
    "kind": "arxiv",
    "version": 1
  }
}