suede-parity-contract

suede-parity-contract is a skill for Claude Code, Codex from JasonColapietro/suede-creator-skills. It costs 212 tokens per session (1,872 once invoked), scanned A, original, MIT.

A procedure for keeping the same product rules and answers across web, iOS, Android, documentation, and other services. It generates a shared contract from one reference implementation and checks the other surfaces against it.

In plain words
What is it for?
Use it to choose one source of truth, generate shared constants, and verify that other applications and documents still agree with it.
Why use it?
It prevents copied values from quietly drifting apart, such as one platform using a different limit or answer. A mismatch becomes a failed test instead of reaching users.

Skill for Claude CodeCodex

Written for Claude Code and Codex: shipped in a Claude Code plugin, but also agents/openai.yaml present.

Part of the suede-skills plugin — 78 skills, 6 agents, 3 MCP servers shipped together

Good fit Use it to choose one source of truth, generate shared constants, and verify that other applications and documents still agree with it.

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Install with agentmods
npx agentmods add skills/jasoncolapietro/suede-creator-skills/suede-parity-contract
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent
npx skills add JasonColapietro/suede-creator-skills --skill suede-parity-contract
Clone the repo
git clone --depth 1 https://github.com/JasonColapietro/suede-creator-skills

Made for: Claude Code, Codex.

Or install suede-skills, the plugin that ships this one along with the rest of its 78 skills, 6 agents, 3 MCP servers.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for suede-parity-contract

README.md
[![agentmods](https://agentmods.dev/badge/skills/jasoncolapietro/suede-creator-skills/suede-parity-contract/github.svg)](https://agentmods.dev/skills/jasoncolapietro/suede-creator-skills/suede-parity-contract)
Your own site
<a href="https://agentmods.dev/skills/jasoncolapietro/suede-creator-skills/suede-parity-contract"><img src="https://agentmods.dev/badge/skills/jasoncolapietro/suede-creator-skills/suede-parity-contract/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for suede-parity-contract

Your own site · 80×15
<a href="https://agentmods.dev/skills/jasoncolapietro/suede-creator-skills/suede-parity-contract"><img src="https://agentmods.dev/badge/skills/jasoncolapietro/suede-creator-skills/suede-parity-contract.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 212 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,872 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe. Third-party audits
  • NVIDIA SkillSpector pass 7 Sept 2026
How audits are shown
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00212 $0.01872
Opus 5 $0.00106 $0.00936
Sonnet 5 $0.00042 $0.00374
Haiku 4.5 $0.00021 $0.00187

Measured 6d ago against content hash a5ed916b84a6, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

suede-parity-contract scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 6d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

skills/suede-parity-contract/SKILL.md · 178 lines

How it starts

The opening of the file, as written. The whole thing — 178 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Suede Parity Contract

Iron Law: generate the contract from the reference surface's live constants.
A contract you transcribe is a second copy, and second copies drift.
A contract you generate cannot disagree with the code it came from.

Silent drift is the failure this prevents. Nothing crashes when a threshold is copied wrong into a second language. The two surfaces simply start answering the same question differently, and a user finds out before you do.

Step 1 — Name one reference surface

Exactly one surface is the reference. Every other surface is a follower that asserts against it. Two references is two sources of truth with extra steps.

Pick the surface where the domain is most complete and most exercised, and write that choice into the contract's reference field so nobody re-litigates it.

Step 2 — Build the contract by importing, never retyping

The builder imports the constants from the modules the application actually runs on and serializes them. Retyping a value into the builder reintroduces exactly the copy this skill exists to delete.

When a needed value is private, export it rather than duplicating it. That is a one-line change and it keeps the count of definitions at one.

Serialize with stable key order and a trailing newline, because followers vendor the file verbatim and a reformat shows up as a spurious diff.

Step 3 — Make staleness fail on the reference side

One test rebuilds the contract in memory and compares it to the committed file. Without it the JSON is a snapshot someone took once.

Give it a write mode so regeneration is one command, and put that command in the contract's README and in the file's own note field:

CONTRACT_WRITE=1 <test runner> <contract test>

Compare parsed objects first so the failure names the key that moved, then compare raw bytes so a reformat is caught too.

Step 4 — Vendor byte-identical to each follower

Followers keep a copy at the same relative path. Prove it matches rather than assuming:

Read the full file on GitHub · 178 lines

Files

What ships with it

2 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 6d ago First seen · 178 lines · 212 tokens per session scan A a5ed916b84a6

Subscribe to this mod's changes

suede-parity-contract is a skill published in the GitHub repository JasonColapietro/suede-creator-skills (135 stars, last pushed today), licensed MIT. It adds 212 tokens to every session and 1,872 once invoked, about $0.0011 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-06.

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