gavishap

Spar — Development skill for Claude Code

Development community

Make the models argue before you build — Codex attacks the plan in bounded read-only rounds, then one builds and the other grades the diff.

How to install Spar

Installs to ~/.claude/commands/gavishap-cortex-spar.md

Terminal

mkdir -p ~/.claude/commands && curl -fsSL https://raw.githubusercontent.com/gavishap/cortex/HEAD/.claude/commands/spar.md -o ~/.claude/commands/gavishap-cortex-spar.md

Restart Claude Code, or start a new session, for it to be picked up.

What Spar does

description: Make the models argue before you build — Codex attacks the plan in bounded read-only rounds, then one builds and the other grades the diff argument-hint: [rounds=N]

Run the `sparring` skill on: $ARGUMENTS

The short version of what that means:

SCOUT — recon from the vault's layered memory (relay status → graph → wiki catalog → narrow raw reads), then present ONE batched Assumptions Ledger with sources. Start state: `python scripts/spar_too

Alternatives in Development

Fidelity — Measure how faithfully a clone reproduces a site — pixel-diff plus motion-fidelity into one 0-100 score, a let 3.6k ★
Magnitude — Open source inference server your agent sets up for you 1.5k ★
CI Mockup Figure — Read and follow the skill definition 239 ★