Pith Number

pith:EG2MMGVW

pith:2026:EG2MMGVWDUJ4BBOC7ZCG2IUN25

not attested not anchored not stored refs pending

PAST-Bench: Benchmarking the Foundations of Recursive Self-Improvement in Personal Agents

Ling Yang, Mengdi Wang, Shuhan Xue, Yichen Shen, Yingcheng Wu, Yinjie Wang, Yuxin Chen, Zhenfei Yin, Zixin Ding

arxiv:2608.04003 v1 · 2026-08-04 · 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{EG2MMGVWDUJ4BBOC7ZCG2IUN25}

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	2026-08-05T01:37:40.820444Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

21b4c61ab61d13c085c2fe446d228dd74c0b4d29fe81d404874668188c382489

Aliases

arxiv: 2608.04003 · arxiv_version: 2608.04003v1 · doi: 10.48550/arxiv.2608.04003 · pith_short_12: EG2MMGVWDUJ4 · pith_short_16: EG2MMGVWDUJ4BBOC · pith_short_8: EG2MMGVW

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/EG2MMGVWDUJ4BBOC7ZCG2IUN25 \
  | 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: 21b4c61ab61d13c085c2fe446d228dd74c0b4d29fe81d404874668188c382489

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6b198828573fc7cd5699a33e737d725351518c219add4178755a56743238fbf4",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CL",
    "submitted_at": "2026-08-04T17:58:05Z",
    "title_canon_sha256": "67d350e539e9bc53fba266ce6d2df5003497eac2e2b62ff8c599b392169e233f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2608.04003",
    "kind": "arxiv",
    "version": 1
  }
}