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Core Anchor programming patterns including program structure, account types, constraints, space calculation, and error handling. Always load this skill when writing or reviewing any Anchor program code.

Cross-Program Invocation patterns for safely calling other programs. Load when implementing SPL token transfers, system program calls, or any inter-program communication.

Program Derived Address patterns for creating deterministic accounts, hashmap-like structures, and program signing. Load when implementing PDAs or working with seeds and bumps.

Security patterns from sealevel-attacks repository and Anchor best practices. Always load this skill when writing or reviewing Anchor programs to prevent common vulnerabilities.

Testing strategies for Anchor programs including unit tests, integration tests, and transaction simulation. Load when writing or reviewing tests for Anchor programs.

SPL Token and Token-2022 patterns for managing token accounts, transfers, and associated token accounts. Load when working with SPL tokens in Anchor programs.

Rust patterns specific to Solana development including serialization, compute optimization, and Solana-specific types. Load when optimizing Solana programs or working with low-level Solana features.