btt

btt is a skill for Claude Code from sablier-labs/plugin-marketplace. It costs 53 tokens per session (1,628 once invoked), scanned A, a copy of btt, MIT.

A writing guide for Bulloak tree files, which describe branching smart-contract test cases and can generate Solidity test scaffolding.

In plain words
What is it for?
Use it to create .tree specifications for contract functions, then generate test contracts with Bulloak. It also includes examples and Sablier-specific conventions.
Why use it?
It gives integration tests a structured way to cover different outcomes and edge cases instead of listing scenarios informally.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

Part of the testing plugin — 3 skills shipped together

Good fit Use it to create .tree specifications for contract functions, then generate test contracts with Bulloak. It also includes examples and Sablier-specific conventions.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/sablier-labs/plugin-marketplace/btt
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.

Any agent
npx skills add sablier-labs/plugin-marketplace --skill btt
Clone the repo
git clone --depth 1 https://github.com/sablier-labs/plugin-marketplace

Made for: Claude Code.

Or install testing, the plugin that ships this one along with the rest of its 3 skills.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for btt

README.md
[![agentmods](https://agentmods.dev/badge/skills/sablier-labs/plugin-marketplace/btt.svg)](https://agentmods.dev/skills/sablier-labs/plugin-marketplace/btt)
Your own site
<a href="https://agentmods.dev/skills/sablier-labs/plugin-marketplace/btt"><img src="https://agentmods.dev/badge/skills/sablier-labs/plugin-marketplace/btt.svg" alt="Measured on agentmods" height="20"></a>
Per session 53 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,628 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin 94% copy Near-identical to another mod 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 5.1 $0.00053 $0.01628
Opus 5 $0.00026 $0.00814
Sonnet 5 $0.00011 $0.00326
Haiku 4.5 $0.00005 $0.00163

Measured 8d ago against content hash 064dfda51bb5, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-08, from the pricing page.

Security

Grade A, and why

btt 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 8d 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.

Origin

This is a copy

94% identical to btt — 52 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

plugins/testing/skills/btt/SKILL.md · 211 lines

How it starts

The opening of the file, as written. The whole thing — 211 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Branching Tree Technique (BTT) Skill

Write bulloak tree specifications for smart contract tests.

Bundled References

Reference Content When to Read
./references/examples.md Complete tree and generated test examples When learning BTT syntax
./references/sablier-conventions.md Sablier-specific terminology and examples When working in Sablier repos

What is Bulloak?

Bulloak is a Solidity test generator that creates test scaffolds from .tree specification files. It offers a structured approach to test case design that ensures comprehensive coverage of all possible scenarios and edge cases in your smart contract tests.

Commands

To install Bulloak, if not found

cargo install bulloak

Generate test contract from a .tree file

bulloak scaffold -wf --skip-modifiers --format-descriptions <path/to/file.tree>

where:

  • --format-descriptions capitalizes the first letter of the branch in the test contract and add a period at the end of it.
  • --skip-modifiers skips the generation of modifiers. We do this because we put all the modifiers in a separate Modifiers.sol file.

Check if the code in .t.sol file matches the specification in the .tree file

bulloak check --skip-modifiers <path/to/file.tree>

Tree Syntax

Structure

FunctionName_ContractName_Integration_Test
├── condition1
│  └── outcome1
└── condition2
   └── outcome2

Terminology

Keyword Purpose
when Conditional branch (user input or timestamp)
given Pre-condition contract state branch
it Action/assertion (leaf node)
  • when and given become modifiers if they have nested branches.

Read the full file on GitHub · 211 lines

Files

What ships with it

2 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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. 8d ago First seen · 211 lines · 53 tokens per session scan A 064dfda51bb5

Subscribe to this mod's changes

btt is a skill published in the GitHub repository sablier-labs/plugin-marketplace (7 stars, last pushed 2mo ago), licensed MIT. It adds 53 tokens to every session and 1,628 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 0 findings. It is 94% identical to btt, differing in 52 lines, and is treated as a copy.

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