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A minimal, explicit, provider-safe harness for the Pi coding agent
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- Updated Oct 2026
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SpecPi
A small, opinionated harness setup for the Pi coding agent: scope control keeps tasks to declared files, an improvement loop turns friction into tested changes, eight pinned packages are verified before install, and LANCET Nano screens shell commands.
- Stars
- 15
- Language
- JavaScript
- License
- MIT
- Reading time
- 3 min
- Published by
- Community
- Author
- tannermidd
- Last verified
- Oct 2026
- Languages
- JavaScript
- Platforms
- CLI
- Capabilities
- Open sourceRuns locally
Highlights
- Scope control keeps each task to its declared files; the improvement loop turns repeated friction into small, tested changes via /harness-improvement.
- LANCET Nano, a 111M-parameter classifier, checks Bash, PowerShell and cmd commands on your own CPU in about 10 ms with no API key and no network traffic.
- Fixed rules settle obvious cases first — blocking rm -rf / and passing git status — before the model scores the rest; risky verdicts ask you first.
- Web access, browser QA and delegation stay off until /webaccess on, /browser on and /delegate on; long builds run as background jobs, listed by /jobs.
- Eight hand-picked packages are locked to exact versions and checked before anything installs, and SpecPi Chat adds a VS Code panel for working beside the agent.
Watch out
Grounded in the truncated repository README (SpecPi 0.37.1) and GitHub metadata reviewed on 2026-10-15; the reviewed excerpt documents no Jev or TypeSafe integration, so this entry's Jev connection is the awesome-jev-projects list attribution, and install steps were past the truncation point.
Questions about this entry
Short answers drawn from the linked project or page.
A minimal, explicit harness setup for the Pi coding agent: one opinionated starting point (version 0.37.1 in the README) built around scope control and an improvement loop, plus eight pinned packages and a VS Code chat panel.
The reviewed README excerpt does not document any Jev or TypeSafe integration; it appears in this directory because it is listed in the awesome-jev-projects collection. Treat this entry as a catalog import pending clearer documentation of the Jev connection.
It keeps each task to the files the agent said it would touch, so work does not sprawl into unrelated parts of the repo. It is one of the two built-in extensions at the center of the setup.
Local notes about repeated friction become small, checked changes to the setup through /harness-improvement, instead of prompts and workarounds piling up. Everything it touches is written down, versioned and easy to undo.
A 111M-parameter classifier that checks shell commands on your own CPU before the agent runs them. It reads Bash, PowerShell and cmd, takes about 10 ms per typical command, needs no API key, sends nothing over the network and costs nothing per check.
Web access, browser QA and delegation stay off until you need them; enable them per session with /webaccess on, /browser on and /delegate on, or let the agent ask when it hits the need. Long builds and evals run as background jobs, listed by /jobs.
It is MIT licensed and written in JavaScript. The README reviewed is an excerpt, so install instructions and any Jev integration were not visible; the examples describe SpecPi around version 0.37.1, and LANCET relies on fixed rules for obvious cases before its model scores the rest.
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