{"type":"raw_signal","id":"improved-token-efficiency-for-longer-agent-runs-2bfa90","slug":"improved-token-efficiency-for-longer-agent-runs-2bfa90","title":"Improved token efficiency for longer agent runs","description":"Cursor says it reduced users’ token costs by 7% without reducing agent quality by reworking its agent harness for longer runs.","retrieval_nugget":"Cursor says it reduced users’ token costs by 7% without reducing agent quality by reworking its agent harness for longer runs.","observed_at":"2026-09-25","record_date":"2026-09-25","date_kind":"observed_at","why_it_matters":"Cursor says it A/B tested tool-context configurations against token use, cost, latency, tool-call errors, and overall agent usage. It retained common reading, search, editing, and shell tools in static context while moving other definitions to dynamic loading. The post reports a 60% reduction in static-context tool-description tokens and a 20% lower cold-cache-miss rate.","novelty":"notable","verification_level":"source-linked","signal_type":"release","source_platform":"cursor.com","topics":["agent-harness"],"entities":[],"related_patterns":[],"source_url":"https://cursor.com/blog/improved-token-efficiency","source_urls":["https://cursor.com/blog/improved-token-efficiency"],"schema_version":"newruntime-agent-readable-v0.2","stable_id":"signal:improved-token-efficiency-for-longer-agent-runs-2bfa90","status":"published","visuals":[],"editor":{"role":"editor","name":"Andrey Reshetnikov","profile":"https://newruntime.com/owner-profile.md","profile_json":"https://newruntime.com/owner-profile.json","same_as":["https://www.linkedin.com/in/reshetnikov1/","https://t.me/lapetuse"]},"routes":{"html":"https://newruntime.com/signals/improved-token-efficiency-for-longer-agent-runs-2bfa90/","markdown":"https://newruntime.com/signals/improved-token-efficiency-for-longer-agent-runs-2bfa90.md","json":"https://newruntime.com/signals/improved-token-efficiency-for-longer-agent-runs-2bfa90.json"},"next_reads":[{"type":"topic","path":"/topics/agent-harness/","url":"https://newruntime.com/topics/agent-harness/","title":"Agent Harness","reason":"Explore the agent-harness topic hub.","media_type":"text/html","markdown_url":"https://newruntime.com/topics/agent-harness.md","json_url":"https://newruntime.com/topics/agent-harness.json"},{"type":"collection","path":"/signals/","url":"https://newruntime.com/signals/","title":"Raw Signals","reason":"Open every source-linked raw signal.","media_type":"text/html","json_url":"https://newruntime.com/signals.json"},{"type":"collection","path":"/source-ledger.json","url":"https://newruntime.com/source-ledger.json","title":"Source Ledger","reason":"Inspect the public source evidence graph.","media_type":"application/json"}]}