add-plugin

add-plugin is a skill for Claude Code from bdfinst/agentic-dev-team. It costs 46 tokens per session (717 once invoked), scanned A, original, MIT.

A tool for installing a Claude Code plugin and registering it in the project's settings file. The settings record lets the team reproduce the same plugin setup.

In plain words
What is it for?
Adding a plugin from a marketplace or repository, including its marketplace source, to a project's shared settings.
Why use it?
It prevents the installed plugins and the project's configuration from getting out of sync, and avoids duplicate registrations.

Skill for Claude Code

Written for Claude Code: allowed-tools in frontmatter. Also seen: reads .claude/ paths; positional $N argument; mentions Claude Code.

Part of the marketplace-dev plugin — 10 skills, 1 agent shipped together

Good fit Adding a plugin from a marketplace or repository, including its marketplace source, to a project's shared settings.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/bdfinst/agentic-dev-team/add-plugin
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 bdfinst/agentic-dev-team --skill add-plugin
Clone the repo
git clone --depth 1 https://github.com/bdfinst/agentic-dev-team

Made for: Claude Code.

Or install marketplace-dev, the plugin that ships this one along with the rest of its 10 skills, 1 agent.

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-plugin

README.md
[![agentmods](https://agentmods.dev/badge/skills/bdfinst/agentic-dev-team/add-plugin.svg)](https://agentmods.dev/skills/bdfinst/agentic-dev-team/add-plugin)
Your own site
<a href="https://agentmods.dev/skills/bdfinst/agentic-dev-team/add-plugin"><img src="https://agentmods.dev/badge/skills/bdfinst/agentic-dev-team/add-plugin.svg" alt="Measured on agentmods" height="20"></a>
Per session 46 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 717 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 warn 7 Sept 2026
SkillSpector: 1 finding, up to medium
  • medium Excessive Agency · line 27
    Skill enables autonomous high-impact decisions without human-in-the-loop verification. Critical operations (destructive commands, financial transactions, data deletion) should require explicit user confirmation.
    Fix: Add human-in-the-loop confirmation for destructive, irreversible, or high-impact operations. Never auto-execute commands that modify files, send data, or alter system state.
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 $0.00046 $0.00717
Opus 5 $0.00023 $0.00358
Sonnet 5 $0.00009 $0.00143
Haiku 4.5 $0.00005 $0.00072

Measured 2d ago against content hash dd392ed91569, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-07, from the pricing page.

Security

Grade A, and why

add-plugin 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.

plugins/marketplace-dev/skills/add-plugin/SKILL.md · 113 lines

How it starts

The opening of the file, as written. The whole thing — 113 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Add Plugin

Role: implementation. This skill installs a Claude Code plugin and adds it to .claude/settings.json so the project's plugin set is reproducible.

You have been invoked with the /add-plugin skill.

Implementation constraints

  1. Always update settings.json. Installing without registering defeats the purpose — the whole point is reproducibility.
  2. Derive marketplace from the identifier. The name@marketplace format encodes both; never ask the user to repeat information already in the argument.
  3. Do not duplicate entries. Check settings.json before adding; if the plugin is already registered, report it and stop.
  4. Be concise. Report only the outcome — no narration of each step.

Parse Arguments

Arguments: $ARGUMENTS

Required: plugin identifier ($0) in name@marketplace format — e.g. skill-creator@claude-plugins-official or refactoring@refactoring.

Optional:

  • --repo <owner/repo>: GitHub repository to register as the marketplace source before installing (e.g. elifiner/refactoring). Required for plugins not on an official marketplace.

Steps

1. Parse arguments

Extract:

  • NAME — the part before @ in $0
  • MARKETPLACE — the part after @ in $0
  • REPO — value of --repo, or empty string if not provided

2. Check for existing registration

Read .claude/settings.json. If enabledPlugins already contains "<NAME>@<MARKETPLACE>": true, report:

<NAME>@<MARKETPLACE> is already registered in settings.json. Nothing to do.

and stop.

3. Register marketplace (if --repo provided)

If REPO is non-empty, run:

claude plugin marketplace add <REPO>

If this fails, report the error and stop.

4. Install the plugin

Run:

claude plugin install <NAME>@<MARKETPLACE>

If this fails, report the error and stop — do not update settings.json for a plugin that did not install successfully.

5. Add to settings.json

Add to the enabledPlugins object in .claude/settings.json:

Read the full file on GitHub · 113 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 First seen · 113 lines · 46 tokens per session scan A dd392ed91569

Subscribe to this mod's changes

add-plugin is a skill published in the GitHub repository bdfinst/agentic-dev-team (280 stars, last pushed 2d ago), licensed MIT. It adds 46 tokens to every session and 717 once invoked, about $0.0002 per session on Opus 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 2026-09-05.

Related

Other skills, from other repositories

recipe-create-meet-space

Create a Google Meet meeting space and share the join link.

googleworkspace/cli · 18 tokens

atmos-config

Atmos root configuration: atmos.yaml discovery, precedence, deep merging, basepath, imports, minimal bootstrap, and routing to narrower Atmos skills.

cloudposse/atmos · 31 tokens

workthreads

SpecStory Workthreads - a weekly work-thread rollup across a team's repos from SpecStory coding histories (any agent - Claude Code, Codex, Cursor, Gemini, and more). It groups the window's sessions into threads of work per project and labels each new / open / recently closed, so a lead sees what shipped, what is still…

specstoryai/getspecstory · 126 tokens

story-readiness

Validate that a story file is implementation-ready. Checks for embedded GDD requirements, ADR references, engine notes, clear acceptance criteria, and no open design questions. Produces READY / NEEDS WORK / BLOCKED verdict with specific gaps. Use when user says 'is this story ready', 'can I start on this story', 'is…

Donchitos/Claude-Code-Game-Studios · 77 tokens

autotask-creator

Rules for automation CRUD from the group-chat commander. The commander does not call mutation tools and does not edit cloud/autotasks files directly. It emits one or more top-level ... containers in its final text; the bus parses and applies them after the turn.

Orkas-AI/Orkas · 5 tokens

monorepo-management

Master monorepo management with Turborepo, Nx, and pnpm workspaces to build efficient, scalable multi-package repositories with optimized builds and dependency management. Use when setting up monorepos, optimizing builds, or managing shared dependencies.

wshobson/agents · 54 tokens