Context Management

jevselector: dropping unused skills from the prompt

S Sam @universamlang · 2026-09-21

EN▶ videoContext ManagementHuman-reviewed entry

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WHAT IT DOES

Skills accumulate. Most of them are never used by the task at hand, yet they keep occupying the context window. jevselector scores them with JEV and drops what is not being used; the author reports roughly a 50% cut to the system prompt.

Pinned skills and per-agent distinctions are respected, so it does not quietly remove something an agent depends on.

Reported by the creator on X.

Summary written by this site

FROM THE ORIGINAL POST

jevselector: Stop paying for Skills you're not using! jevselector uses @opencode + @typesafeai Jev to score and drop the unused Skills — cutting the system prompt ~50%. — Sam · Original post

JEV ROLE

Filtering Score #tooling#context-window#demo

WHERE IT SITS

HOW IT WORKS

INPUTthe installed skill list of an agent

JEVFiltering

OUTPUTa keep/drop decision per skill

WHAT THE POST SHOWED

No observable metrics recorded. Metrics are only published when they can be tied to a source link.

SOURCE

↗ Original post

Source checked

Evidence is a status, not a ranking. It says how the claim can be checked — not whether the case is good.