i didn't expect people to build this much with Jev already
1,000 emails sorted for roughly $0.03. 1,000 reviews checked in 4.6 seconds. fewer calls to Claude.
8 open-source repos, starting with the ones you can use every day:
1. sort your Gmail → jevmail
sort Gmail into needs reply, updates, promos, sales and spam. each message gets an urgency score.
the author reports:
1,000 emails → about 1 minute → roughly $0.03
read-only Gmail access. nothing gets sent or deleted.
github.com/fazlerocks/jevmai…
2. send uncertain emails to Claude → claude-x-jev
Jev sorts emails, leads or comments. Claude reads the uncertain items and writes.
the author's inbox:
216 emails → 38 for Claude to review
in the separate sorting comparison:
→ Jev: about $0.01
→ Opus 5.5: $4.73
github.com/charlesdove977/cl…
3. let Jev handle browser clicks → firefox-jev-mcp
Opus sets the browser goal. Jev handles the clicks.
in a Wikipedia navigation test:
→ Claude turns: 12 to 4
→ Claude tokens: 88,500 to 20,800
→ total time: 23.4 to 14.7 seconds
github.com/kitoutou999/firef…
4. turn app reviews into priorities → jev-column-race
turn 1,000 app reviews into sentiment, topics, bug reports and scores for how likely users are to leave.
→ Jev: 4.6 seconds / $0.023
→ Gemini 3.8 Flash: 18.8 seconds / $0.158
4.1x faster. about 7x cheaper in the recorded comparison.
github.com/goodrahstar/jev-c…
5. find code by asking a question → every
ask your codebase a question like "which functions ignore errors?"
the author measured:
1,302 functions → 3.7 seconds → $0.018
you get ranked matches with files and lines to inspect.
github.com/sufianetaouil/eve…
6. load only relevant skill descriptions → jev-skill-gate
Claude doesn't need every installed skill description in every session.
one Rust example with 217 skills:
estimated description tokens → 12,750 to 3,185
75% smaller → roughly $0.00074 for the Jev call
the skills remain available to invoke manually.
github.com/ShivamPansuriya/j…
7. check commands before they run → hermes-jev-approvals
Jev checks commands against your rules and returns approve, deny or ask a person.
in the author's 156-command benchmark:
→ review time: 619 to 63.2 seconds
→ human prompts: 42 to 10
a separate study against GPT-5.4 mini found a smaller 1.24x reviewer-time speedup.
github.com/anpicasso/hermes-…
8. put useful search passages first → jev-rerank-server
put relevant search passages first before your model reads them.
25 search queries → 500 relevance checks
16.9 seconds → about $0.016 at listed API rates
in that sample, the top-10 ranking score improved from 0.616 to 0.718.
github.com/gbesse/jev-rerank…
all eight are open source. the numbers come from the authors' tests and examples. API usage is billed separately.
pick a repo → get your Jev API key with this guide → follow the repo's setup instructions ↓