install-formula

install-formula is a skill for Claude Code from rjroy/vibe-garden. It costs 31 tokens per session (513 once invoked), scanned A, original, MIT.

A setup skill that installs a reusable lore-development workflow into a project's Beads configuration. Beads is the project's system for storing and running these workflows.

In plain words
What is it for?
Adding the lore-development formula to a project and showing how to run it with Beads commands.
Why use it?
Installing a project workflow can overwrite an existing file or put it in the wrong project. This skill checks the project, compares existing files, verifies the workflow, and avoids silent replacement.

Skill for Claude Code

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

Part of the lore-development plugin — 14 skills, 6 agents shipped together

Good fit Adding the lore-development formula to a project and showing how to run it with Beads commands.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/rjroy/vibe-garden/install-formula
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 rjroy/vibe-garden --skill install-formula
Clone the repo
git clone --depth 1 https://github.com/rjroy/vibe-garden

Made for: Claude Code.

Or install lore-development, the plugin that ships this one along with the rest of its 14 skills, 6 agents.

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 install-formula

README.md
[![agentmods](https://agentmods.dev/badge/skills/rjroy/vibe-garden/install-formula/github.svg)](https://agentmods.dev/skills/rjroy/vibe-garden/install-formula)
Your own site
<a href="https://agentmods.dev/skills/rjroy/vibe-garden/install-formula"><img src="https://agentmods.dev/badge/skills/rjroy/vibe-garden/install-formula/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for install-formula

Your own site · 80×15
<a href="https://agentmods.dev/skills/rjroy/vibe-garden/install-formula"><img src="https://agentmods.dev/badge/skills/rjroy/vibe-garden/install-formula.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 31 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 513 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 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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00031 $0.00513
Opus 5.5 $0.00012 $0.00205
Sonnet 5.5 $0.00006 $0.00103
Haiku 4.5 $0.00003 $0.00051

Measured 9d ago against content hash 99f1f4f586e7, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

install-formula 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 9d 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.

lore-development/skills/install-formula/SKILL.md · 51 lines

How it starts

The opening of the file, as written. The whole thing — 51 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Install Formula

Install the plugin's lore-development Beads formula into the current project.

Process

  1. From this skill's base directory, resolve the plugin root two levels up. The source formula is at ../../formulas/lore-development.formula.toml.
  2. Confirm the current directory is the intended project root. Do not install into a parent directory or a different checkout without the user's explicit path.
  3. Create .beads/formulas/ if it does not exist.
  4. If .beads/formulas/lore-development.formula.toml does not exist, copy the source formula there.
  5. If it already exists, compare it with the plugin formula. Report that it is already installed when identical. If it differs, stop and ask whether the user wants to replace it. Never overwrite a project-owned formula silently.
  6. Run bd formula show .beads/formulas/lore-development.formula.toml --json and verify that the parsed result contains the required variables and workflow steps, with human gates on approve-design and approve-plan. Intent is conversational context, not an approval gate.
  7. Explain how to use the installed formula. bd mol pour can cook a formula from the project formula search path directly:
bd mol pour lore-development --var topic="..." --var artifact_name="..."

Approval Semantics

Do not replace human gates with an approved variable. Variables provide work inputs; they do not establish that a person made a decision. A human gate remains open until a person resolves it with bd gate resolve <gate-id>.

The formula gates design and implementation-plan approval, not intent. Intent is a conversational record of what and why, not a contract requiring approval. Implementation proceeds without a routine approval gate. If the implementation skill encounters a concrete safety or compatibility concern or a stuck correction loop, it must escalate to the user rather than inventing an approval value.

Safety

  • Do not modify an existing formula without explicit user permission.
  • Do not create or close molecule steps while installing the formula.
  • Do not claim that a gate was approved based on a variable, prompt assumption, or agent judgment.

Read the full file on GitHub · 51 lines

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. 9d ago First seen · 51 lines · 31 tokens per session scan A 99f1f4f586e7

Subscribe to this mod's changes

install-formula is a skill published in the GitHub repository rjroy/vibe-garden (6 stars, last pushed 10d ago), licensed MIT. It adds 31 tokens to every session and 513 once invoked, about $0.0001 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-10-08.

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