Pith Number

pith:YXPRLSBU

pith:2026:YXPRLSBUH46VAD3UITFGNCEPUD

not attested not anchored not stored refs pending

Ground Truth First: A Longitudinal Evaluation Instrument for Agent Memory, and the Tenure Crossover in Memory-Architecture Rankings

Quentin Spencer

arxiv:2607.21962 v1 · 2026-07-24 · 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{YXPRLSBUH46VAD3UITFGNCEPUD}

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	2026-07-27T00:20:29.965335Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c5df15c8343f3d500f7444ca66888fa0c35f587dbb7981f554db9624df82e6eb

Aliases

arxiv: 2607.21962 · arxiv_version: 2607.21962v1 · doi: 10.48550/arxiv.2607.21962 · pith_short_12: YXPRLSBUH46V · pith_short_16: YXPRLSBUH46VAD3U · pith_short_8: YXPRLSBU

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/YXPRLSBUH46VAD3UITFGNCEPUD \
  | 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: c5df15c8343f3d500f7444ca66888fa0c35f587dbb7981f554db9624df82e6eb

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d71180fbab2383fcaf03e13c48d9714be9895c0e53f8ae70c76a424c7babd764",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CL",
    "submitted_at": "2026-07-24T04:19:45Z",
    "title_canon_sha256": "19bb7f1e344364dc60b4cedbd47184e0c46f624b9bd43eff73a56e8ce8c2facb"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2607.21962",
    "kind": "arxiv",
    "version": 1
  }
}