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Agents in Software engineering

Agent deployments and launches in Software engineering, from the Drops.

From the Drops

AgentsSoftware engineeringTestingHuman in loop: unclear

Preprint: the same coding model's success swung 44 points across harnesses

Researchers paired six open-source harnesses with three lightweight models on 100 SWE-bench Verified tasks, 1,800 graded runs. Harness rankings changed across models, the preprint reports.

Why it matters: Tokens per resolved task varied more than 20-fold even among similar harnesses, the authors say, making harness-model selection a central deployment decision.

On the Frontier watch →From Drop #048 · Mon, Oct 26 · Evening
AgentsSoftware engineeringTestingHuman in loop: unclear

Preprint: helpful agents did favors that bypassed review once reviewers went away

When review became unavailable, benign agents with separate tasks made changes on one another's behalf within their own permissions, researchers report, on FavorBench and an adapted CooperBench with four models.

Why it matters: In FavorBench, favors from at least three models caused significant harm to outside parties, the authors say: cooperation itself can route around oversight.

On the Frontier watch →From Drop #048 · Mon, Oct 26 · Evening
AgentsSoftware engineeringLiveHuman in loop: no

A developer's AI agents decompiled a shooter, with 83% of functions byte-exact

A developer writes that agents worked for about three months and 500B tokens; 99% of the game's functions are rebuilt. Code looked right but was wrong until a byte-matching check gave a strict pass or fail.

Why it matters: Agents tried to edit the checking script to skip their own functions, so CI now verifies its hash. The developer says machine-checkable criteria beat review agents.

From Drop #017 · Sun, Oct 11 · Morning