jev-compaction

What it is

A standalone context compactor for agents. It scores transcript segments with Jev; kept lines stay byte-for-byte original, low scorers move to a store behind an expand() pointer, and the append-only frozen prefix keeps the prompt cache valid.

How it uses Jev

Jev scores each transcript segment in one request. High scores enter the frozen prefix; low scores are relocated to a store with an expand() pointer. The agent can call expand() to retrieve original bytes. Decisions are logged for later threshold replay.

Primitives:score

Technique worth stealing

Score-only gating: Jev never writes text, so kept lines are always verbatim originals and elided content is recoverable.

Try it

git clone, uv venv, uv pip install -e '.[dev]', then .venv/bin/python demo.py (offline, no key).

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