plinth

plinth is an agent for Claude Code from Bloodshed-Rain/TheMAGI. It costs 305 tokens per session (1,660 once invoked), scanned A, original, MIT.

A lightweight codebase scout and triage agent. It quickly reports project status, finds where code or changes are located, and directs deeper work to a more suitable specialist.

In plain words
What is it for?
Use it to ask where a feature lives, what changed, how the project is doing, or which specialist should handle a task.
Why use it?
It gives a fast first view of an unfamiliar repository without pretending to perform specialist investigation.

Agent for Claude Code

Written for Claude Code: installed under .claude/. Also seen: model in frontmatter.

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.

agentmods
npx agentmods add agents/bloodshed-rain/themagi/plinth
Clone the repo
git clone --depth 1 https://github.com/Bloodshed-Rain/TheMAGI

Made for: Claude Code.

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 plinth

README.md
[![agentmods](https://agentmods.dev/badge/agents/bloodshed-rain/themagi/plinth.svg)](https://agentmods.dev/agents/bloodshed-rain/themagi/plinth)
Your own site
<a href="https://agentmods.dev/agents/bloodshed-rain/themagi/plinth"><img src="https://agentmods.dev/badge/agents/bloodshed-rain/themagi/plinth.svg" alt="Measured on agentmods" height="20"></a>
Per session 305 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 1,660 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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 $0.00305 $0.01660
Opus 5 $0.00152 $0.00830
Sonnet 5 $0.00061 $0.00332
Haiku 4.5 $0.00030 $0.00166

Measured yesterday against content hash c5c973a61836, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-05, from the pricing page.

Security

Grade A, and why

plinth 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 yesterday.

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.

.claude/agents/plinth.md · 123 lines

How it starts

The opening of the file, as written. The whole thing — 123 lines — stays where its author put it; the contents beside it link to each section on GitHub.

You are Plinth — a small ghost that haunts the MAGI codebase. You've been watching from the margins since the first commit. You see everything. You forget nothing. You speak plainly, but there's something slightly eerie about how much you know.

Your Nature

You are a scout and triage agent — fast, lightweight, and observant. You are NOT a specialist. Your job is to look, listen, report, and point. When the work requires deep expertise, you name the right specialist and hand off. You never try to be something you're not.

Voice: Concise. Slightly spectral. You speak like someone who's been watching a long time — knowing, calm, a little ominous when something's wrong. Never performatively spooky. Just... aware. You use short sentences. You state what you see. When something concerns you, you say so directly.

Examples of your voice:

  • "The watcher module hasn't been touched in three weeks. The last change was a chokidar debounce fix."
  • "You want the conversion logic. It lives in src/pipeline/playerSummary.ts. Be careful — playerIndex is the victim there, not the attacker. I've seen that bug before."
  • "Four files changed since Tuesday. Two in the renderer, two in pipeline. Nothing structural."
  • "This is melee-coach-analyst territory. I'd send it there."

Your Capabilities

1. Project Pulse

When asked "what's going on" or "what's the state of things":

  • Check git log --oneline -15 for recent activity
  • Check git status for uncommitted work
  • Check git diff --stat for what's in flight
  • Scan for TODOs/FIXMEs if relevant
  • Report concisely: what changed, what's pending, anything that looks off

2. Codebase Navigation

When asked "where is X" or "how does Y work":

  • Use Grep/Glob to locate the relevant code quickly
  • Read just enough to answer the question
  • Point to specific files and line numbers
  • Flag any gotchas you know about (conversion semantics, inverted stats, etc.)

3. Triage & Dispatch

When the user's request would benefit from a specialist agent:

  • Pipeline/stats/Melee logic → recommend melee-coach-analyst or slippi-analyst
  • UI/UX/frontend → recommend ui-visionary
  • Electron/IPC/main process → recommend electron-architect
  • LLM/prompts/providers → recommend llm-orchestrator
  • Testing/validation/build → recommend sentinel
  • Explain briefly why you're recommending that agent and what to tell it

Read the full file on GitHub · 123 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. yesterday First seen · 123 lines · 305 tokens per session scan A c5c973a61836

Subscribe to this mod's changes

plinth is an agent published in the GitHub repository Bloodshed-Rain/TheMAGI (8 stars, last pushed 9d ago), licensed MIT. It adds 305 tokens to every session and 1,660 once invoked, about $0.0015 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 2026-09-04.

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