User repository on GitHub
A minimal Pareto-optimal OpenRouter model router for pi, based on Jev
- Forks
- 1
- Last pushed
- Updated Sep 2026
Repo stats from the GitHub API, cached Oct 2026.
CommunityJev Agents & MCP
Pi Jev Router — philippdubach
Pi extension that classifies each task with Jev over OpenRouter and routes it to a Pareto-optimal model balancing measured quality, cost, and latency under a role policy.
- Stars
- 13
- Language
- TypeScript
- License
- MIT
- Published by
- Community
- Author
- philippdubach
- Last verified
- Oct 2026
About this project
pi-jev-router is a pi extension. It classifies each task with Jev (TypeSafe System One, called through OpenRouter) and routes the task to an OpenRouter model. The pick balances quality, cost and latency, and follows a role policy for planning, code and writing. The default mode is shadow: the router records what it would pick and does not switch. Use /router auto or /router auto --dry-run N to let it switch.
Quoted from the project's README. Read the full README.
Used inJev for Software & DevTools
- Languages
- TypeScript
Highlights
- Shadow by default records the pick without switching; auto and dry-run modes allow controlled switching.
- One Jev call per task for category, complexity, risk, brief, and decompose, with continuation fast path.
- Hard gates for tool support, context, pricing, and measured pass rates relax in fixed order with ledger notes.
- Every decision appends model pick, active model, classifier answers, and context to decisions.jsonl.
Watch out
Budget covers main session, classifier calls, and workers; at cap it picks the cheapest frontier model and a pin does not override it. Dispatch outcomes are recorded but not yet used as evidence. Reloads happen on long sessions. Copy reviewed against the repository README on 2026-10-04, not from running it.
Questions about this entry
Short answers drawn from the linked project or page.
No, shadow is the default and only records what it would pick. Switching needs explicit auto, a dry-run count that returns to shadow, or a pin, and budget caps force the cheapest frontier pick with a warning.
When Jev is confident the brief needs clarification the router abstains and does not switch, leaving the current model to ask. Continuations keep the model except after abstain or pin.
Measured pass rates are smoothed toward an Artificial Analysis prior so measured and unmeasured models share one scale. Hard tasks read hard-suite evidence once a model has enough hard runs, with gates relaxing in fixed order.
Replay the ledger through the current selector with no model calls and diff picks before and after a change. A small live classifier set checks work-kind accuracy for a fraction of a cent.
Run npm install, set OPENROUTER_API_KEY or reuse the key in ~/.pi/agent/auth.json, and copy config/models.openrouter.json to ~/.pi/agent/models.json. Then symlink the checkout into ~/.pi/agent/extensions/pi-jev-router so pi loads it each process, and restart pi after an update.
The default mode records the model it would pick and does not switch. Use /router auto to let it switch per task, or /router auto --dry-run N to switch for N tasks and then return to shadow with a summary. /router pin forces a model, and a session budget caps automatic switching.
Every decision is appended to ~/.pi/agent/jev-router/decisions.jsonl, recording the pick, the model that actually ran, the reason, the classifier answers, the first 400 characters of the context block, the context size, and the loaded router version. A failed ledger write only prints one line to stderr.
Other listings of this project
Forks and copies of this project in the directory. This entry is the canonical one.
11GitHub stars
Pi Coding Agent extension that routes only at task boundaries, using Jev judgments plus declared capabilities, availability, price estimates, and failure state.
Jev Agents & MCP#community#jevbest#catalog-import
Community
win4r/pi-jev-routerTypeScript
win4r/pi-jev-routerTypeScriptMore Jev resources like this
10GitHub stars
Node router that sends each query to the cheapest capable LLM tier by asking Jev to classify demand against your tier descriptions, with no LLM call spent on routing.
Jev Agents & MCP#community#jevbest#catalog-import
Community
rajdhakad9826/jev-routerTypeScript
rajdhakad9826/jev-routerTypeScript5GitHub stars
A Claude Code function hook that sends AskUserQuestion dialogs to Jev and draws a probability per option above the dialog, so you still choose while seeing how confident the model is.
Jev Agents & MCP#community#jevbest#catalog-import
Community
BeLazy167/typesafe-modTypeScript
BeLazy167/typesafe-modTypeScript3GitHub stars
Model router that asks Jev eleven questions in one call and lets a YAML policy turn the answers into a tier. Every request starts on the fast tier and only escalates on evidence such as multi-step reasoning, hard difficulty, high stakes or safety, and every decision is logged without the message text.
Jev Agents & MCP#community#jevbest#catalog-import
Community
iamvatsalpatel/tiershiftTypeScript
iamvatsalpatel/tiershiftTypeScript2GitHub stars
Model router that never names a model: Jev classifies the task family, then a cost-per-task Pareto walk picks the cheapest frontier point clearing its quality floor.
Jev Agents & MCP#community#jevbest#catalog-import
Community
tylerjharden/ailerixTypeScript
tylerjharden/ailerixTypeScript6GitHub stars
A per-prompt capability router for coding agents: a local BM25 shortlist of installed skills, MCP servers, subagents and commands, then one Jev request injects at most one suggestion plus two runner-ups.
Jev Agents & MCP#community#jevbest#catalog-import
Community
bestagentkits/jev-skillfulTypeScript
bestagentkits/jev-skillfulTypeScript10GitHub stars
Two pi extensions driven by Jev judgments: one replaces summary-based context compaction with keep, drop and shorten calls, the other scores each prompt for difficulty and switches pi's model before the turn runs.
Jev Agents & MCP#community#jevbest#catalog-import
Community
iefnaf/pi-jevTypeScript
iefnaf/pi-jevTypeScriptFrom the Jev community
Posts from builders shipping with Jev right now.