Pith Number

pith:E5FNZT7K

pith:2026:E5FNZT7KWPGKASQ63XR5VAI2Z3

not attested not anchored not stored refs pending

Matryoshka Agent: Unfolding Sub-Agents for Long-Horizon Machine Learning Engineering

Bo Dai, Changhao Li, Chao Zhang, Haotian Sun, Rushi Qiang, Yuchen Zhuang

arxiv:2607.25090 v1 · 2026-07-27 · cs.AI · cs.LG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{E5FNZT7KWPGKASQ63XR5VAI2Z3}

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	2026-07-29T00:25:02.237586Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

274adccfeab3cca04a1edde3da811acef8d652839ae11ade49c27a5e9b670b66

Aliases

arxiv: 2607.25090 · arxiv_version: 2607.25090v1 · doi: 10.48550/arxiv.2607.25090 · pith_short_12: E5FNZT7KWPGK · pith_short_16: E5FNZT7KWPGKASQ6 · pith_short_8: E5FNZT7K

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/E5FNZT7KWPGKASQ63XR5VAI2Z3 \
  | 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: 274adccfeab3cca04a1edde3da811acef8d652839ae11ade49c27a5e9b670b66

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2be014cf157b036245c2c4efd9d008b9bb9473b3421a5570262d6bb0295b9d6f",
    "cross_cats_sorted": [
      "cs.LG"
    ],
    "license": "http://creativecommons.org/licenses/by-nc-sa/4.0/",
    "primary_cat": "cs.AI",
    "submitted_at": "2026-07-27T21:30:39Z",
    "title_canon_sha256": "c65256d922d7998751b9adcf31d2f5ae1dd3a16e0ef8553b0110eb5d79e4025c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2607.25090",
    "kind": "arxiv",
    "version": 1
  }
}