Jev Decision Gate by BPJ MCP server

Jev Decision Gate · by BPJ

Use Jev for Issue triage without building the whole integration and review workflow.

中文 · MCP setup · Evaluation method · BPJ developer tools

Why install ours? Get six MCP tools for local Issue batches, task/usage checks, independent calibration, held-out evaluation and accept/review recommendations. The same workflow is available as a Skill or CLI. LLM vs direct Jev vs our MCP.

Underlying model prices: about 238× difference, with the same hypothetical input volume. Standard uncached prices on 2026-10-02: Claude Fable 5.1 $10/M input tokens; Jev 1.13 $0.042/M. Against Haiku 4.5 ($1/M), the ratio is 23.8×. Direct Jev and our MCP share this Jev input price. This compares model input unit prices; total workflow cost depends on actual usage, output, retries and agent-host charges.

Price math and assumptions · Static image · Actual rules output

An independent MIT-licensed Python tool for repository maintainers. Run a rules baseline, optionally call TypeSafe's Jev, and calibrate which suggestions may be accepted. The first case predicts issue kind, affected module and information sufficiency. It never edits issues, applies labels, posts comments or closes tickets.

Version 0.3.1, early developer preview. This is an integration and statistical gate, not Jev's model, training algorithm, or an official TypeSafe product. The bundled cases are 12 original synthetic examples for trying the workflow.

Run in two minutes

Python 3.11+:

git clone https://github.com/f-tiger/jev-decision-gate.git
cd jev-decision-gate
python -m venv .venv
# macOS / Linux
source .venv/bin/activate
# Windows PowerShell: .venv\Scripts\Activate.ps1
python -m pip install '.[mcp]'
jev-gate demo --out demo-report.json --export-issues demo-issues.json

The demo runs locally without keys or network requests. It produces real output from a deliberately simple rules baseline. All items initially require review. Keep the report: compare on your own labels before choosing a provider. Commands refuse to overwrite existing output files.

Reproduce the animation's price calculation without a key:

python tools/price_scenario.py --input-tokens 1000000 --fallback-fraction 0.1

This scenario is $0.042 for Jev input plus $1 for an extra 10% of that input sent to Fable, or $1.042 versus $10. The 9.6× input-cost ratio is hypothetical, excludes output/retries/review, and does not imply this package calls Fable. Share a successful run or a blocker.

Call Jev on selected issues

Set TYPESAFEAPIKEY through your local environment or secret manager. Do not paste a key into an issue, model chat, repository or MCP configuration committed to Git. Jev mode sends selected title/body text to https://api.typesafe.ai/v1/systemone; BPJ receives nothing.

jev-gate triage demo-issues.json --provider jev --max-calls 12 --out jev-report.json

Shortened. The full README is on GitHub.