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Thinking coreutils
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- Updated Oct 2026
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CommunityJev Tools & CLIs
Grev
grep, sort, cut and uniq that match by meaning: each line whose Jev Noul clears the threshold survives grev, sibling filters route by Choice and rank by Score, and the output is always your own input, never generated text.
- Stars
- 56
- Language
- Go
- License
- APACHE-2.0
- Published by
- Community
- Last verified
- Oct 2026
About this project
Unix filters that ask questions instead of matching patterns. The tools run on TypeSafe's Jev models, which answer typed questions with calibrated probabilities instead of generating text. That's why these tools behave like grep, sort or cut: output is always your input. Labels and scores appear only as explicit columns. A few thousand lines cost fractions of a cent and take seconds. Every tool has --help and a man page. The common flags:
Quoted from the project's README. Read the full README.
Used inJev for Software & DevTools
- Languages
- Go
- Platforms
- CLIOpenRouter
- Capabilities
- Open sourceRequires API key
Highlights
- Ships roughly 16 tools including grev, isv, tagv, sortv, rank, uniqv, cutv, seek, trv, lookv and probev.
- Documented costs: Jev at $0.042 per million input tokens; grepping a 4,000-line source file is about $0.008.
- Spend guards include confirmAbove prompts, daily and monthly caps, and a per-run --max-cost flag.
- An Agent Skill installs to ~/.claude/skills and ~/.agents/skills via grev-settings skill install.
Watch out
Requires a TypeSafe API key by default, with OpenRouter and Fastino GLiDE endpoints configurable; relative cost depends on provider pricing. Dual licensed Apache-2.0/MIT.
Questions about this entry
Short answers drawn from the linked project or page.
It asks typed Jev questions about each record and prints the records the model says yes to, so output is always a subset of your input and labels or scores appear only as explicit columns.
Yes. Set api.endpoint and api.model for OpenRouter (jev-latest or jev-1.13) or Fastino's GLiDE; the README notes those runs cost several times more than on Jev.
Roughly sixteen, each the semantic counterpart of a coreutils filter: grev like grep, isv like test, oneof like case, tagv like awk with a --split mode that routes records into files, sortv like sort, plus rank, uniqv, cutv, pickv, seek, trv, lookv, probev and unwrap.
Documented at $0.042 per million input tokens for Jev, and grepping a 4,000-line source file is about $0.008. A few thousand lines take seconds, and the more expensive bisect-style tool lookv only needs 3 requests across 600 lines.
Yes. Spend guards include confirmAbove prompts, daily and monthly caps, and a per-run --max-cost flag, so a broad pass over a large file can be bounded before it runs.
Yes. An Agent Skill installs to ~/.claude/skills and ~/.agents/skills via grev-settings skill install, which is how the tools are meant to reach a coding agent without pasting commands by hand.
Dual licensed Apache-2.0/MIT. It requires a TypeSafe API key by default, with OpenRouter and Fastino GLiDE endpoints configurable, and relative cost depends on the provider you point it at.
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