Pith Number

pith:KF6EAGED

pith:2026:KF6EAGEDSAYTRWNAMZEL5UHPOH

not attested not anchored not stored refs pending

FitText: Evolving Agent Tool Ecologies via Memetic Retrieval

Chenchen Ye, Han Zhang, Kyle Zheng, Renliang Sun, Wei Wang

Embedding evolutionary retrieval inside an agent's reasoning loop allows dynamic adaptation to evolving task needs in large tool ecosystems.

arxiv:2605.02411 v2 · 2026-05-04 · cs.AI · cs.IR · cs.LG · cs.MA

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\usepackage{pith}
\pithnumber{KF6EAGEDSAYTRWNAMZEL5UHPOH}

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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.

Claims

C1strongest claim

On ToolRet (43k tools, 4 domains), FitText improves average retrieval rank from 8.81 to 2.78; on StableToolBench (16,464 APIs), it achieves a 0.73 average pass rate--a 24-point absolute gain over static query retrieval.

C2weakest assumption

The base model must be capable of acting as a competent semantic operator for generating and refining pseudo-tool descriptions; under weaker models the evolutionary search inverts and amplifies noise.

C3one line summary

FitText embeds memetic evolutionary retrieval inside the agent's reasoning loop to iteratively refine pseudo-tool descriptions, raising retrieval rank from 8.81 to 2.78 on ToolRet and pass rate to 0.73 on StableToolBench.

Formal links

3 machine-checked theorem links

Receipt and verification

First computed	2026-06-11T01:09:36.720464Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

517c401883903138d9a06648bed0ef71e71d1099c0f0a967573fcd6d3b2387e4

Aliases

arxiv: 2605.02411 · arxiv_version: 2605.02411v2 · doi: 10.48550/arxiv.2605.02411 · pith_short_12: KF6EAGEDSAYT · pith_short_16: KF6EAGEDSAYTRWNA · pith_short_8: KF6EAGED

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/KF6EAGEDSAYTRWNAMZEL5UHPOH \
  | 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: 517c401883903138d9a06648bed0ef71e71d1099c0f0a967573fcd6d3b2387e4

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d8e2f52bf3175be91768d008e363e66629b420f606a21cb5a03bcad20d934216",
    "cross_cats_sorted": [
      "cs.IR",
      "cs.LG",
      "cs.MA"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cs.AI",
    "submitted_at": "2026-05-04T10:01:24Z",
    "title_canon_sha256": "9df02b7fea2af15228bc64847699625900c421b8e1b688756d237e31d50872ae"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2605.02411",
    "kind": "arxiv",
    "version": 2
  }
}