# Spi Parallel Verify

> Verify Strong Parallelism Invariance (SPI) and GF(3) conservation for 3-way color streams with arbitrary precision.

- Skill: `majiayu000/spi-parallel-verify` (Agent Skill, multi-file: 2 files)
- Install (CLI): `npx skillmds add majiayu000/spi-parallel-verify`
- Raw SKILL.md: https://api.skillmd.com/api/skills/majiayu000/spi-parallel-verify/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- Author: majiayu000 (https://skillmd.com/u/majiayu000)
- Updated: 2026-09-09
- Page: https://skillmd.com/skills/majiayu000/spi-parallel-verify

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# SPI Parallel Verify

Use when validating that parallel, shuffled, or split execution yields identical results.

## Inputs
- seed, indices, precision
- sources (optional): splitmix_ternary, xoroshiro_3color, gay_mcp

## Workflow
1. Compute ordered, reversed, shuffled results.
2. Compute parallel split if available.
3. Compare at fixed precision or via hex.
4. Validate GF(3) per triplet.
5. Emit a deterministic report.

## Commands (music-topos)
- `just spi-verify`
- `just spi-gf3-parallel`
- `ruby -I lib -r splitmix_ternary -e "require 'json'; puts JSON.pretty_generate(SplitMixTernary.prove_out_of_order)"`

## Acceptance
- ordered == reversed == shuffled
- parallel == sequential
- gf3_ok == true
- avoid float truncation of RNG state

## Report fields
- seed, indices, all_equal, parallel_ok, gf3_ok, precision

## Example prompt
"Verify SPI and GF(3) for 3-stream triads at seed 0x42D and report determinism."