ADAvault

Midnight Skill — Testing skill for Claude Code

Testing community

Claude Code skill for writing and testing Compact smart contracts on Midnight.

How to install Midnight Skill

This entry records only its repository, not the path inside it, so there is no exact command to give. Open ADAvault/midnight-skill and copy the folder into ~/.claude/skills/, or the file into ~/.claude/agents/.

What Midnight Skill does

Claude Code skill for writing and testing Compact smart contracts on Midnight.

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README

Midnight Compact Smart Contract Skill

An [Agent Skill](https://agentskills.io) for writing, testing, and deploying **Compact smart contracts** on the **Midnight blockchain**. Built from Discord community knowledge, compiler validation, and real-world gotchas. This project extends the [Midnight Network](https://midnight.network) with additional developer tooling.

Supports Claude Code, Cursor, Gemini CLI, VS Code Copilot, and 30+ other AI coding assistants.

**Important:** These examples are educational references. Any smart contract generated using this skill should be professionally audited before deployment to mainnet. AI-assisted code generation does not replace security review.

Compiler-Validated

All examples compiled and tested against **Compact 0.30.0** (`compact-runtime` 0.15.0, ledger v8). Also compatible with Compact 0.29.0 (ledger v7). See gotcha #74 for migration guide.

✅ Re-validated 2026-08-17 — all 29 examples compile on Compact 0.31.1

Every published example was recompiled from source against the current compiler.

set result

10 standalone validation contracts 10/10 PASS

19 remaining + new contracts 19/19 PASS

vendored OpenZeppelin compact-contracts 9/10 — see below

**Toolchain:** `compact` CLI **0.5.1**, compiler **0.31.1**, `compact-runtime` **0.16.0**, Midnight.js **4.1.1**, Node 1.0.1, Ledger 8.1.0. ([support matrix](https://docs.midnight.network/relnotes/support-matrix))

⚠ `compact --version` reports the **CLI wrapper** (0.5.1), not the compiler (0.31.1). Easy to confuse when checking which you are on.

**🔴 Compact 0.31.0 has a soundness bug** that can silently drop a range constraint. Use **0.31.1**+. If you deployed anything built with 0.31.0, diff the verifier key — source review is explicitly *not* reliable for finding it. Details in `SKILL.md`.

**Breaking changes found, and what they mean for older code:**

CoinInfo is now an **unbound