Pith Number

pith:PCJ4L5FN

pith:2026:PCJ4L5FNVUFGK35AFPPKCOCUUU

not attested not anchored not stored refs pending

The Regression Tax: Decomposing Why Skills Help and Hurt LLM Agents

Baran Nama, Darshan Tank

arxiv:2607.22520 v1 · 2026-07-24 · cs.AI

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{PCJ4L5FNVUFGK35AFPPKCOCUUU}

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	2026-07-27T01:21:31.852741Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7893c5f4adad0a656fa02bdea13854a507f336ae3d4785a861e731776334d668

Aliases

arxiv: 2607.22520 · arxiv_version: 2607.22520v1 · doi: 10.48550/arxiv.2607.22520 · pith_short_12: PCJ4L5FNVUFG · pith_short_16: PCJ4L5FNVUFGK35A · pith_short_8: PCJ4L5FN

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/PCJ4L5FNVUFGK35AFPPKCOCUUU \
  | 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: 7893c5f4adad0a656fa02bdea13854a507f336ae3d4785a861e731776334d668

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "325c11e471d518e7bd6f2b6399b13b561ca483a2498020b7f0c90c5f2652ee48",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cs.AI",
    "submitted_at": "2026-07-24T17:50:03Z",
    "title_canon_sha256": "ae24a8d177edd03e7c90853e116f803d8e120761f7928cff733cf287c9d69e5a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2607.22520",
    "kind": "arxiv",
    "version": 1
  }
}