agent-add

agent-add is a skill for Claude Code from bdfinst/agentic-dev-team. It costs 96 tokens per session (720 once invoked), scanned A, original, MIT.

A helper for creating Claude Code agent files that follow the project's required format. It supports review agents, which inspect code, and team agents, which act as defined personas.

In plain words
What is it for?
Use it when adding an agent for a new kind of code issue or creating a team agent with a specified role.
Why use it?
It avoids hand-writing agent files that may use the wrong structure, model setting, or token budget. It also directs the work to the project's agent-creation process.

Skill for Claude Code

Written for Claude Code: allowed-tools in frontmatter. Also seen: mentions subagents; mentions Claude Code.

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

Good fit Use it when adding an agent for a new kind of code issue or creating a team agent with a specified role.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/bdfinst/agentic-dev-team/agent-add
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 agent-add
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 agent-add

README.md
[![agentmods](https://agentmods.dev/badge/skills/bdfinst/agentic-dev-team/agent-add.svg)](https://agentmods.dev/skills/bdfinst/agentic-dev-team/agent-add)
Your own site
<a href="https://agentmods.dev/skills/bdfinst/agentic-dev-team/agent-add"><img src="https://agentmods.dev/badge/skills/bdfinst/agentic-dev-team/agent-add.svg" alt="Measured on agentmods" height="20"></a>
Per session 96 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 720 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 Agent Snooping · line 44
    Skill enumerates or reads other installed skills. Access to other skills' SKILL.md files or the skills directory reveals prompt instructions, capabilities, and secrets that should be invisible to peer skills.
    Fix: Remove all code or instructions that list or read other skills' files or directories. Skills should operate independently; cross-skill access is a privilege escalation.
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 $0.00096 $0.00720
Opus 5 $0.00048 $0.00360
Sonnet 5 $0.00019 $0.00144
Haiku 4.5 $0.00010 $0.00072

Measured 2d ago against content hash d8ea430bc1ad, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-07, from the pricing page.

Security

Grade A, and why

agent-add 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/agent-add/SKILL.md · 64 lines

What it actually says

Agent Add

Role: implementation.

Implementation constraints

  1. Follow the official sub-agent schema and token budgets.
  2. Delegate the build to the agent-create skill; do not improvise structure.
  3. Be concise. Report the created agent file, no narration.

Steps

1. Parse arguments

Capture the agent name/spec or URL from $ARGUMENTS.

2. Delegate

Invoke the agent-create skill with the arguments.

3. Report

Output the created file path.

Apply the guidelines defined in skills/agent-create/SKILL.md to the current task. Read the skill file and follow its steps exactly.

If $ARGUMENTS starts with http:// or https://, fetch the URL with WebFetch first and extract the relevant guidance, then use that content as the agent description.

Pass these flags through to the skill as context:

  • --plugin <dir> → target plugin directory (resolved by agent-create Step 0)
  • --name <name> → set agent name (skips name prompt)
  • --type review|team → set agent type (skips type prompt)
  • --model sonnet|opus|haiku|fable|inherit|<full model ID> → sets the agent's model (invalid values rejected against agent-contract.json)
  • --effort low|medium|high|xhigh|max → sets the agent's reasoning effort (invalid values rejected against agent-contract.json)
  • --memory user|project|local / --isolation worktree / --color <color> / --max-turns <int> / --background true|false / --skills <name1,name2,...> → optional native fields, no forced defaults
  • --context diff-only|full-file|project-structure → sets Context needs: field
  • --lang <exts> → adds language scope declaration to the body
  • --dry → show generated content without writing to disk or updating registry

Apply this skill to: $ARGUMENTS

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 · 64 lines · 96 tokens per session scan A d8ea430bc1ad

Subscribe to this mod's changes

agent-add is a skill published in the GitHub repository bdfinst/agentic-dev-team (280 stars, last pushed 2d ago), licensed MIT. It adds 96 tokens to every session and 720 once invoked, about $0.0005 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.

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