anchor-programs

Development guidance for Solana programs, which are blockchain programs that run on the Solana network. It covers state, instructions, errors, testing, and dependencies.

In plain words
What is it for?
Designing program state, defining instructions, handling errors, writing tests, and managing dependencies.
Why use it?
It helps structure these programs and check their behavior consistently.

Cursor rule for Cursor

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add rules/dewicats/solana-dev-cursor-rules/anchor-programs
Clone the repo
git clone --depth 1 https://github.com/DeWiCats/solana-dev-cursor-rules

Made for: Cursor.

Per session 1,342 This file is loaded in full into every session.
When invoked 1,342 The same file — it is already loaded in full.
Security scan A 1 finding. Scan, not verified.
Origin unknown No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5 $0.01342 $0.01342
Opus 5 $0.00671 $0.00671
Sonnet 5 $0.00268 $0.00268
Haiku 4.5 $0.00134 $0.00134

Measured 2d ago against content hash 6b17a97ef6ce, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

anchor-programs scanned grade A with 1 finding against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

const gameState = await program.account.gameState.fetch(gameKeypair.publicKey);
.cursor/anchor-programs.mdc · 209 lines

The source is not reproduced here

No licence file

A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.

Read it on GitHub

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 2d ago First seen · 209 lines · 1,342 tokens per session scan A 6b17a97ef6ce

Subscribe to this mod's changes

anchor-programs is a cursor rule published in the GitHub repository DeWiCats/solana-dev-cursor-rules (6 stars, last pushed 1y ago), with no licence file. It adds 1,342 tokens to every session, about $0.0067 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.