What is stacks-agent?

A development guide for building applications on Stacks, a blockchain network whose smart contracts use Bitcoin as their settlement layer. It includes examples and guidance for Clarity contracts, tokens, DeFi, security, Stacks.js, naming, staking, and deployment.

Use it to create, audit, debug, or deploy Stacks smart contracts and connected web applications, including fungible tokens, NFTs, DeFi features, and Bitcoin-related operations.

It gives coding agents current example patterns and troubleshooting guidance for Stacks development. This helps avoid deprecated APIs and common transaction or security mistakes.

stacks-agent — Skill by kai-builder

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 skills/kai-builder/stacksagent/stacks-agent

Any agent

npx skills add kai-builder/stacksagent --skill stacks-agent

Clone the repo

git clone --depth 1 https://github.com/kai-builder/stacksagent

Made for: Claude Code, Codex.

Per session 19 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 2,530 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. Scan, not verified.

Origin original 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.

Model	Per session	Once invoked
Fable 5	$0.00019	$0.02530
Opus 5	$0.00010	$0.01265
Sonnet 5	$0.00004	$0.00506
Haiku 4.5	$0.00002	$0.00253

Measured 2d ago against content hash c8c3a5bc7cc3, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

stacks-agent scanned grade A with 0 findings 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.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

.claude/skills/stacks-agent/SKILL.md · 274 lines

How it starts

The opening of the file, as written. The whole thing — 274 lines — stays where its author put it; the contents beside it link to each section on GitHub.