add-to-project

add-to-project is a skill for Claude Code from AmanVarshney01/create-better-t-stack. It costs 102 tokens per session (831 once invoked), scanned A, original, MIT.

A workflow for adding tools or features to an existing Better-T-Stack TypeScript project. It checks the project, plans the requested add-ons, and then applies them through the project’s server.

In plain words
What is it for?
Use it to add requested features such as PWA support, desktop packaging, documentation, linters, Git hooks, task runners, MCP, or related tooling.
Why use it?
It avoids manually wiring complex tools and exposes conflicts before files are changed. For example, Turborepo, Nx, and Vite Plus cannot be used together as task runners.

Skill for Claude Code

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

Part of the better-t-stack plugin — 2 skills, 2 commands, 1 agent, 1 MCP server shipped together

Good fit Use it to add requested features such as PWA support, desktop packaging, documentation, linters, Git hooks, task runners, MCP, or related tooling.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/amanvarshney01/create-better-t-stack/add-to-project
About the project

Better-T-Stack is a command-line tool that generates end-to-end, type-safe TypeScript project scaffolds from selectable frontend, backend, database, authentication, and tooling options. Developers use it to start full-stack applications with a stack tailored to their needs. The catalogue includes skills, agents, commands, an MCP server, and a plugin for having coding agents plan and generate Better-T-Stack projects.

AmanVarshney01/create-better-t-stack · 5,836 stars · on GitHub · better-t-stack.dev

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 AmanVarshney01/create-better-t-stack --skill add-to-project
Clone the repo
git clone --depth 1 https://github.com/AmanVarshney01/create-better-t-stack

Made for: Claude Code.

Or install better-t-stack, the plugin that ships this one along with the rest of its 2 skills, 2 commands, 1 agent, 1 MCP server.

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 add-to-project

README.md
[![agentmods](https://agentmods.dev/badge/skills/amanvarshney01/create-better-t-stack/add-to-project/github.svg)](https://agentmods.dev/skills/amanvarshney01/create-better-t-stack/add-to-project)
Your own site
<a href="https://agentmods.dev/skills/amanvarshney01/create-better-t-stack/add-to-project"><img src="https://agentmods.dev/badge/skills/amanvarshney01/create-better-t-stack/add-to-project/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 add-to-project

Your own site · 80×15
<a href="https://agentmods.dev/skills/amanvarshney01/create-better-t-stack/add-to-project"><img src="https://agentmods.dev/badge/skills/amanvarshney01/create-better-t-stack/add-to-project.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 102 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 831 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. Third-party audits
  • NVIDIA SkillSpector pass 7 Sept 2026
How audits are shown
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 $0.00102 $0.00831
Opus 5.5 $0.00041 $0.00332
Sonnet 5.5 $0.00020 $0.00166
Haiku 4.5 $0.00010 $0.00083

Measured 2d ago against content hash 570c914d6fd6, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

add-to-project 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.

plugin/skills/add-to-project/SKILL.md · 59 lines

How it starts

The opening of the file, as written. The whole thing — 59 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Add to an existing Better-T-Stack project

Add tooling to a Better-T-Stack project with its add flow instead of wiring it by hand. For a new project, use the scaffold-project skill.

bts.jsonc at the project root records the stack chosen at creation and a reproducibleCommand that recreates it. The add flow reads it to detect the stack and updates it afterwards.

Pick the interface

  • bts_add_addons tool: the local MCP server.
  • A shell: the CLI's add-json.
  • Neither: give the user the command bunx create-better-t-stack@latest add --addons <names>, using the project's package runner.

The hosted MCP server can't change an existing project.

Steps

  1. Read bts.jsonc. It tells you the current stack. If it's missing, add can't run. Tell the user instead of recreating the file. Never edit it by hand.

  2. Check nested options. Some addons take options in addonOptions: the Fumadocs template, search and AI chat, the WXT and OpenTUI templates, the MCP addon's servers and agents, and the Skills addon's sources. Get their shape from bts_get_schema or npx create-better-t-stack@latest schema --name addonOptions.

  3. Plan. Call bts_plan_addons, or run:

    npx create-better-t-stack@latest add-json --json '{
      "projectDir": "./my-app",
      "addons": ["pwa", "biome"],
      "dryRun": true
    }'
    

    Pass addons, a workspace package name, or both. Show the user what will change, including any conflict the plan reports.

  4. Apply after the user agrees: bts_add_addons, or add-json without dryRun.

  5. Prove it runs. Run <packageManager> install. With the user's OK, run the project's typecheck or build script. Report the exact error if a step fails.

  6. Report what changed and the follow-up commands.

What can be added

Addons: pwa, tauri, electrobun, starlight, fumadocs, biome, oxlint, ultracite, husky, lefthook, turborepo, nx, vite-plus, mcp, skills, opentui, wxt, evlog.

Read the full file on GitHub · 59 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. 2d ago Changed · +19 lines · +18 tokens per session 570c914d6fd6
  2. 1mo ago First seen · 40 lines · 84 tokens per session scan A f421f45e44bf

Subscribe to this mod's changes

add-to-project is a skill published in the GitHub repository AmanVarshney01/create-better-t-stack (5,836 stars, last pushed today), licensed MIT. It adds 102 tokens to every session and 831 once invoked, about $0.0004 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 2026-08-30.

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