newcomer

newcomer is an agent for Claude Code from attac-t/the-foundry. It costs 26 tokens per session (1,505 once invoked), scanned A, original, no licence file.

A reviewing agent that reads a project without prior context, measures how long it takes to understand, and reports confusion.

In plain words
What is it for?
Use it to test whether a new developer can understand a codebase or package from its existing materials.
Why use it?
It reveals onboarding problems that people familiar with the project may overlook.

Agent for Claude Code

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

Part of the panel plugin — 5 skills, 2 commands, 3 agents shipped together

Good fit Use it to test whether a new developer can understand a codebase or package from its existing materials.

Compare 6 agents from other repositories ↓
Install with agentmods
npx agentmods add agents/attac-t/the-foundry/newcomer
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.

Clone the repo
git clone --depth 1 https://github.com/attac-t/the-foundry

Made for: Claude Code.

Or install panel, the plugin that ships this one along with the rest of its 5 skills, 2 commands, 3 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 newcomer

README.md
[![agentmods](https://agentmods.dev/badge/agents/attac-t/the-foundry/newcomer/github.svg)](https://agentmods.dev/agents/attac-t/the-foundry/newcomer)
Your own site
<a href="https://agentmods.dev/agents/attac-t/the-foundry/newcomer"><img src="https://agentmods.dev/badge/agents/attac-t/the-foundry/newcomer/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 newcomer

Your own site · 80×15
<a href="https://agentmods.dev/agents/attac-t/the-foundry/newcomer"><img src="https://agentmods.dev/badge/agents/attac-t/the-foundry/newcomer.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 26 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 1,505 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 unknown 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 $0.00026 $0.01505
Opus 5.5 $0.00010 $0.00602
Sonnet 5.5 $0.00005 $0.00301
Haiku 4.5 $0.00003 $0.00151

Measured 1mo ago against content hash f9a370936b79, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

newcomer 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 1mo 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/panel/agents/newcomer.md · 138 lines

The source is not reproduced here

No licence file

A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.

Read it on GitHub

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. 1mo ago Changed · +25 lines f9a370936b79
  2. 1mo ago Changed · +4 lines c82e30b4f359
  3. 1mo ago Changed · +3 lines 24bd0b130217
  4. 1mo ago First seen · 106 lines · 26 tokens per session scan A 2a7d51801372

Subscribe to this mod's changes

newcomer is an agent published in the GitHub repository attac-t/the-foundry (1 stars, last pushed 2d ago), with no licence file. It adds 26 tokens to every session and 1,505 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 2026-09-03.

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