9 open-source repos that plug Jev into coding agents
A roundup of nine repos including jev-opus, jev-harness and jev-pilot that use Jev to adjust Opus 5.5's thinking effort per step, pick models and route skills, with the author's own test results.
Opus 5.5 + Jev is a coding agent that thinks harder after a failing test and eases off once it passes by default, Claude Code runs a whole session at one effort level. jev-opus changes that, and 8 more repos put Jev around coding agents Jev steering Opus 5.5: 1. jev-opus: effort re-picked by Jev at every step on Opus 5.5, prompt cache unbroken http://github.com/WXK-AI/jev-opus 2. jev-harness: Jev as Claude Code's decision layer. permissions, skill routing, effort-tiered subagents on Opus 5.5 http://github.com/dansya-arsana/jev-harness 3. jev-pilot: a plugin where Jev picks effort, subagent model and skill for every prompt http://github.com/Akramovic1/jev-pilot 4. jev-effort: per-step effort from Jev, and an honest result below http://github.com/ifoster01/jev-effort Jev around coding agents: 5. claude-dev-router: races Opus 5.5 low, Fable 5.1 low and Haiku 4.5 against Jev on a modeled bench http://github.com/PineapplesDev/claude-dev-router 6. jev-router: Jev Router in the /model picker decides the model for each fresh turn http://github.com/gargpratyush/jev-router 7. jev-code: Jev as five tools inside Claude Code, Codex, Pi and OpenCode, plus a skill for when to use them http://github.com/FrancoisChastel/jev-code 8. jev-harness (ismaelsoilet): a test-failure gate. pipe the test runner through Jev, not the traceback through a frontier model http://github.com/ismaelsoilet/jev-harness 9. jev-dev-harness: a safety toolkit for coding agents, one command to register it as an MCP server http://github.com/celolopes/jev-dev-harness the numbers, from the authors themselves: jev-pilot: its own jev-bench check scored 8/8 for $1.93, against $2.20 for Claude alone on high jev-effort: Opus 5.5 at high effort already thinks little on routine steps, so a 46% thinking cut moved total cost by only about 1% start with jev-opus: npm install -g jev-opus && jev-opus init && jev-opus claude (init asks for your Jev key) in short: Opus 5.5 does the work, Jev answers the small questions, your code owns the rules these are community projects and several ask for your API keys, so read the code before you run one
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