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genvm-lint

Check GenLayer intelligent contracts before testing. This skill uses the GenVM linter to find forbidden code patterns, SDK usage errors, and type mismatches, with JSON output for repeated fixes and commands to extract contract interface definitions.

OriginalShow the original description

Validate GenLayer intelligent contracts with the GenVM linter.

Run score Not tested

See how to install

Good for

  • Checking a contract before running tests
  • Finding forbidden imports and invalid storage types
  • Fixing errors repeatedly using JSON results
  • Extracting contract interface definitions

Files included (3)

  • SKILL.md2.7 KB
  • agents/openai.yaml205 B
  • LICENSE1.0 KB

SKILL.md (original)

Review the instructions the agent will receive before you install.

GenVM Lint

Validate intelligent contracts for safety, correctness, and SDK compliance.

Setup

Requires genvm-linter (included in requirements.txt for boilerplate projects):

pip install genvm-linter

Workflow

Always lint before testing. Run genvm-lint check after writing or modifying a contract. Fix all errors before running tests.

genvm-lint check contracts/my_contract.py

check runs both lint (AST safety) and validate (SDK semantics) in one pass.

Commands

check (recommended)

genvm-lint check contracts/my_contract.py
genvm-lint check contracts/my_contract.py --json  # Machine-readable output

lint (fast AST checks only, ~50ms)

genvm-lint lint contracts/my_contract.py

Catches:

  • Forbidden imports (os, sys, subprocess, random, etc.)
  • Non-deterministic patterns (bare float usage)
  • Contract header structure issues

validate (SDK semantic checks, ~200ms)

genvm-lint validate contracts/my_contract.py

Validates:

  • Types exist in SDK (TreeMap, DynArray, Address, etc.)
  • Decorators correctly applied (@gl.public.view, @gl.public.write)
  • Storage fields have valid types (no dict/list)
  • Method signatures correct

schema (extract ABI)

genvm-lint schema contracts/my_contract.py
genvm-lint schema contracts/my_contract.py --json
genvm-lint schema contracts/my_contract.py --output abi.json

typecheck (Pyright/Pylance)

genvm-lint typecheck contracts/my_contract.py
genvm-lint typecheck contracts/my_contract.py --json
genvm-lint typecheck contracts/my_contract.py --strict

Runs Pyright with SDK paths auto-configured. Catches type mismatches, missing attributes, undefined variables.

download (pre-download GenVM artifacts)

genvm-lint download                    # Latest
genvm-lint download --version v0.2.12  # Specific
genvm-lint download --list             # Show cached

Output Formats

Human (default)

✓ Lint passed (3 checks)
✓ Validation passed
  Contract: MyContract
  Methods: 8 (5 view, 3 write)

JSON (--json)

{"ok":true,"lint":{"ok":true,"passed":3},"validate":{"ok":true,"contract":"MyContract","methods":8,"view_methods":5,"write_methods":3,"ctor_params":2}}

Exit Codes

  • 0 — All checks passed
  • 1 — Lint or validation errors found
  • 2 — Contract file not found
  • 3 — SDK download failed

Agent Workflow

When fixing lint errors iteratively:

  1. Run genvm-lint check contract.py --json
  2. Parse JSON for specific errors
  3. Fix each error in the contract
  4. Re-run check until "ok": true
  5. Proceed to tests

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