# Anchor

> Anchor framework for Solana programs — program structure, PDAs, CPI, IDL, errors, events, zero-copy, constraints, account types, and CLI for agent-driven tooling.

- Skill: `hairyf/anchor` (Agent Skill, multi-file: 12 files)
- Install (CLI): `npx skillmds@latest add hairyf/anchor`
- Raw SKILL.md: https://api.skillmd.com/api/skills/hairyf/anchor/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: AI & ML
- Author: hairyf (https://skillmd.com/u/hairyf)
- Updated: 2026-09-10
- Page: https://skillmd.com/skills/hairyf/anchor

---


> Skill is based on Anchor v0.32.1, generated 2026-02-09.

Concise reference for building Solana programs with Anchor: macros, accounts, PDAs, CPI, IDL, custom errors, events, zero-copy, constraints, account types, and CLI.

## Core References

| Topic | Description | Reference |
|-------|-------------|-----------|
| Program Structure | declare_id, #[program], #[derive(Accounts)], #[account], Context | [core-program-structure](references/core-program-structure.md) |
| PDA | seeds, bump, init, IDL/client resolution, PDA signer | [core-pda](references/core-pda.md) |
| CPI | CpiContext, transfer, PDA signer, invoke/invoke_signed | [core-cpi](references/core-cpi.md) |
| IDL | Instructions, accounts, discriminators, client usage | [core-idl](references/core-idl.md) |

## Features

| Topic | Description | Reference |
|-------|-------------|-----------|
| Custom Errors | error_code, err!, require! macros, client handling | [features-errors](references/features-errors.md) |
| Events | emit!, emit_cpi!, #[event], addEventListener, event-cpi | [features-events](references/features-events.md) |
| Zero-Copy | AccountLoader, #[account(zero_copy)], load/load_mut/load_init | [features-zero-copy](references/features-zero-copy.md) |

## References

| Topic | Description | Reference |
|-------|-------------|-----------|
| Account Constraints | signer, mut, init, seeds/bump, has_one, address, owner | [references-account-constraints](references/references-account-constraints.md) |
| Account Types | Account, Signer, Program, AccountLoader, Interface types | [references-account-types](references/references-account-types.md) |
| CLI | build, deploy, test, idl, keys, account, expand, upgrade, verify | [references-cli](references/references-cli.md) |