claim

active

claim:post-evolution-performance-is-dominated-by-the-task-solving-agent-s-base-capability-not-by-evolver-identity

Post-evolution performance is dominated by the task-solving agent's base capability, not by evolver identity

Practical implication of Observation 2 in evolver-side analysis

Source paper

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Harness Updating Is Not Harness Benefit: Disentangling Evolution Capabilities in Self-Evolving LLM Agents

(2026) · Minhua Lin · Juncheng Wu · Zijun Wang · Zhan Shi +13

Neighborhood — ranked by edge-count

Findings (2)

finding

Pairing weakest anchor agent with best evolver against strongest anchor with worst evolver, the strong agent still leads by 18.6 to 35.2 pp on every benchmark
supports
Confirms that post-evolution performance bottleneck is on the agent side, not evolver side
Within-agent spread across seven evolvers is at most 5.1 pp (Qwen3-235B on MCP), small against the 36.0 pp gap between Opus and Qwen3-235B base capabilities
supports
Demonstrates that post-evolution score is dominated by agent base capability, not evolver identity

Claims (1)

claim

Capability budget should be allocated to the task-solving agent rather than the evolver, since harness-updating varies by at most 3.1 pp across evolvers
supports
Primary design recommendation derived from harness-updating flatness finding

Related by similarity (8)

cosine ≥ 0.65 · no typed edge

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