jev-conductor

# Jev Conductor composition Jev Conductor shows a live scrolling score: Jev (TypeSafe's System One model) picks the next bar's chord, bass note, lead phrase, mood and energy on a bar clock, and the pane performs it with Web Audio. The agent curates `piece.json` — the musical constraints Jev improvises within. ## The loop 1. Update `piece.json`. The viewer watches it and reshapes Jev's playing live — no restart, no second server. 2. `node "$JEV_DSH/toolchain/check.mjs"` verifies the workspace's `piece.json` is valid and range-checked, and reports the current verdict. Run it before you call a piece done. 3. Listen (or reason about the design): a narrow consonant scale + small harmonic palette yields coherent improv; a wide or chromatic scale yields chaos. Name the moods you want to hear. ## Reading Jev The viewer colors each bar by mood and shows Jev's choices (chord, bass, lead, mood, energy). Because Jev's *choice* questions return a probability distribution, `jev.mjs`'s mock and the real model both pick a `choice` — but what matters musically is the *constraint design*: a strong tonic, a small consonant scale, vivid mood labels. Design those well and any path Jev walks sounds like music. ## Verifying a piece `node "$JEV_DSH/toolchain/check.mjs"` returns non-zero when `piece.json` is invalid (bad notes, out of range, empty palettes). It does not replace judging the *music*. The real test is coherence: with a tonic-centered chord list and a consonant scale, Jev's random walks resolve; with a giant chromatic scale they won't. ## Driving Jev yourself `toolchain/jev.mjs` exports a small client. Example (from the workspace) — audition a chord palette before you commit to it: ```bash node --input-type=module -e ' import { evaluate, jev } from "$JEV_DSH/toolchain/jev.mjs"; const res = await evaluate({ state: "You are scoring mood music. Palette A resolves to the tonic; palette B is all tension.", questions: { electric: jev.score({0:"flat",1:"alive",2:"electric"}, "How electric is this palette to improvise in?"), cohesive: jev.noul("Will random walks through this palette sound cohesive?"), }, }); console.log(JSON.stringify(res.answers, null, 2)); ' ``` Without `TYPESAFE_API_KEY` this uses the deterministic mock; set the key to hit live Jev.