Pith Number

pith:XLZTRT52

pith:2026:XLZTRT52DFIFRZP6ICYFW72Y46

not attested not anchored not stored refs pending

M$^\star$: Every Task Deserves Its Own Memory Harness

Mirror Xu, Shiwei Zhang, Shujie Liu, Wanlu Shi, Wenbo Pan, Xiangyang Zhou, Xiaohua Jia

LLM agents perform better with task-specific memory programs evolved as Python code than with any fixed shared design.

arxiv:2604.11811 v2 · 2026-04-10 · cs.PL · cs.AI · cs.CL · cs.LG

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

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\usepackage{pith}
\pithnumber{XLZTRT52DFIFRZP6ICYFW72Y46}

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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

M$^* improves performance over existing fixed-memory baselines robustly across all evaluated tasks. Furthermore, the evolved memory programs exhibit structurally distinct processing mechanisms for each domain.

C2weakest assumption

That reflective population-based code evolution on the chosen benchmarks will reliably discover memory programs that are both superior and generalizable beyond the specific evaluation tasks and failure modes analyzed.

C3one line summary

M* evolves distinct Python memory programs per task via population-based reflective search, outperforming fixed-memory baselines on conversation, planning, and reasoning benchmarks.

Receipt and verification

First computed	2026-05-26T01:03:29.940052Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

baf338cfba195058e5fe40b05b7f58e7a88476312353e31d2913a86b38c0e34f

Aliases

arxiv: 2604.11811 · arxiv_version: 2604.11811v2 · doi: 10.48550/arxiv.2604.11811 · pith_short_12: XLZTRT52DFIF · pith_short_16: XLZTRT52DFIFRZP6 · pith_short_8: XLZTRT52

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/XLZTRT52DFIFRZP6ICYFW72Y46 \
  | 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: baf338cfba195058e5fe40b05b7f58e7a88476312353e31d2913a86b38c0e34f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "615e6f1e42d13bb7870ed92f3f47a8849dbf1aea0366307132a79d9d740043ce",
    "cross_cats_sorted": [
      "cs.AI",
      "cs.CL",
      "cs.LG"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.PL",
    "submitted_at": "2026-04-10T03:22:26Z",
    "title_canon_sha256": "5940f3f552839e945d0d9d51ae0c4950f5ad766c0b0911d674649645196452be"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2604.11811",
    "kind": "arxiv",
    "version": 2
  }
}