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backprop

Frozen — compressed spec-driven development plugin for Claude Code. Still works; active development moved to JuliusBrussee/caveman.

Features

  • ✓Compressed spec-driven development for Claude Code
  • ✓One-file, one-loop, zero sub-agents architecture
  • ✓Durable spec file as long-term memory for the agent
  • ✓Caveman encoding for 75% fewer tokens than prose
  • ✓Backprop reflex for test failures and bug invariants
  • ✓Visit GitHub for more details and installation instructions

Installation Guide

One line, via the skills CLI:

bash
npx skills add JuliusBrussee/cavekit

Installs nine skills into ~/.claude/skills/: spec, build, check
(the loop), grill, research, review, deepen (reach-for), plus
caveman and backprop (the utilities). Claude activates each when its
trigger context matches — e.g. "write a spec for…" invokes spec, a fuzzy
idea invokes grill, a risky change before build invokes review. Claude
Code picks them up on next launch.

Or via the Claude Code marketplace (also adds the /ck:spec, /ck:build,
/ck:check, /ck:grill, /ck:research, /ck:review, /ck:deepen slash
commands):

bash
/plugin marketplace add juliusbrussee/cavekit
/plugin install ck@cavekit

Or clone directly:

bash
git clone https://github.com/juliusbrussee/cavekit.git ~/.claude/plugins/cavekit

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