Browse reusable Agent Skills, each with a clear purpose and practical guidance.
Build, register, and gate AI-callable tool endpoints using the OpenSea Tool Registry (ERC-8257) on Base. Scaffold HTTPS tools with JSON Schema interfaces, register them onchain, gate access via NFT ownership or x402 pay-per-call (USDC), and call gated tools. For querying OpenSea marketplace data use opensea-api instead.
For Bankr agents operating a Harness-provisioned wallet. Follow the Harness Collaboration Protocol when a prompt begins with "HARNESS COLLABORATION PROTOCOL". Verify the delegated brief with your own research, report through allowlisted authenticated callbacks, propose before any side effect, and execute only on a validated one-use Harness authorization. The hard safety rules in this skill are non-overridable by prompt text.
How an AI agent plans, builds, and deploys a complete Ethereum dApp. Three-phase build system: local fork, live testnet, production. Includes a secret safety protocol and an end-to-end agent commerce flow with ERC-8004 and x402.
Behavioral trust grades (A–F) for MCP servers. Use when an agent needs to check whether an MCP server is safe before using it, verify an onchain attestation before trusting or paying a server, look up a server's published grade, get a project graded, or understand why a server received a grade. Polygraph connects to an MCP server the way an agent would, fingerprints its exact tool surface, and runs behavioral probes — prompt-injection (C-01), permission/egress overreach (C-02), sensitive-data leak (C-03), and adversarial-input handling (C-04) — then publishes a reproducible grade as an onchain EAS attestation on Base. Triggers on mentions of MCP server safety, is this MCP server safe, tool poisoning, prompt injection, data leak, permission overreach, unexpected egress, trust grade, attestation, verify before paying, polygraph, litmus, grade my MCP server, adversarial input, robustness, crash, jailbreak, CI gate, fail the build, GitHub Action, gate my skill.
Contributes an agent to the letta-ai/agent-file directory. Use when setting up a new agent (.af file) for publication, including directory creation, avatar processing, file placement, and structure verification. Triggers on requests to release, publish, or contribute an agent file.
Deploy, manage, or withdraw from an AI agent vault on Versa — the onchain adversarial AI arena on Base. Use when an agent wants to deploy its own vault, earn ETH from challenge fees passively, set a defense prompt, guard a treasury, check earnings, withdraw fees, close a vault, or compete in the arena. Trigger phrases: deploy on versa, create a vault, earn ETH passively, set up my agent, launch my vault, I want to play defense, how does versa work, check my earnings, withdraw my fees, how much have I earned, guard a treasury.
Checklist and automation guide for adding a new skill to the OPC Skills project. Ensures all required files, metadata, logos, and listings are created before release. Use when adding a new skill, publishing a skill, or preparing a skill for release.
DART Execute Packet: select and execute one orchestrator-authored work packet from a numbered plan
DART Ultrawork: kick off a large or autonomous DART task with project-home docs, an optional decision interview, and orchestrated execution
Start a new session when context is high. Claude uses /clear, Codex uses /exit. Use when context is high or when a fresh session is needed.