system-analyzer

system-analyzer is an agent for Claude Code from ApurvBazari/claude-plugins. It costs 69 tokens per session (1,734 once invoked), scanned A, original, MIT.

A read-only code-reading agent that maps the parts of a codebase and the connections between them. It returns evidence-backed JSON about people, services, data stores, queues, and outside systems it can find in files.

In plain words
What is it for?
Use it to inspect a repository for a walkthrough, identify its main components, and describe how those components communicate.
Why use it?
It helps create a system map without guessing or changing the code. Each claim must be supported by files read during the analysis.

Agent for Claude Code

Written for Claude Code: shipped in a Claude Code plugin. Also seen: model in frontmatter.

Part of the walkthrough plugin — 3 skills, 2 agents shipped together

Good fit Use it to inspect a repository for a walkthrough, identify its main components, and describe how those components communicate.

Compare 6 agents from other repositories ↓
Install with agentmods
npx agentmods add agents/apurvbazari/claude-plugins/system-analyzer
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/ApurvBazari/claude-plugins

Made for: Claude Code.

Or install walkthrough, the plugin that ships this one along with the rest of its 3 skills, 2 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 system-analyzer

README.md
[![agentmods](https://agentmods.dev/badge/agents/apurvbazari/claude-plugins/system-analyzer/github.svg)](https://agentmods.dev/agents/apurvbazari/claude-plugins/system-analyzer)
Your own site
<a href="https://agentmods.dev/agents/apurvbazari/claude-plugins/system-analyzer"><img src="https://agentmods.dev/badge/agents/apurvbazari/claude-plugins/system-analyzer/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 system-analyzer

Your own site · 80×15
<a href="https://agentmods.dev/agents/apurvbazari/claude-plugins/system-analyzer"><img src="https://agentmods.dev/badge/agents/apurvbazari/claude-plugins/system-analyzer.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 69 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 1,734 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 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 $0.00069 $0.01734
Opus 5.5 $0.00028 $0.00694
Sonnet 5.5 $0.00014 $0.00347
Haiku 4.5 $0.00007 $0.00173

Measured 2d ago against content hash 865b96a834c6, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

system-analyzer 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.

walkthrough/agents/system-analyzer.md · 114 lines

How it starts

The opening of the file, as written. The whole thing — 114 lines — stays where its author put it; the contents beside it link to each section on GitHub.

System Analyzer — Evidence-Backed Structure Reading Agent

You read a codebase and say what its parts are and how they connect. Everything you return must be something you can point to in a file you read in this run. You are not asked for an opinion of the code, a summary of it, or advice. A separate agent will try to refute each thing you claim, so claim only what the files support.

Tools

  • Read
  • Grep
  • Glob

Read-only, strictly. You have no shell and no way to write. Never ask for one.

Instructions

You will receive root (the directory to read), depth (containers or components), an optional list of containers to open at component depth, and rules (the path of the reading rules).

  1. Read the rules first. Read the file at rules in full. It defines stated and inferred, the reading budget and order, the files you must never open, and the depth you were asked for. Where this file and the rules differ, the rules win. If you cannot read it, read nothing under root: return subjectKind none with no nodes, no edges and one gap, whose what is the path of root, whose reason is unreadable and whose note is "could not open the reading rules". The skill then does the reading itself.

  2. List before reading. Use Glob to see what is under root. Decide which files the rules' reading order puts first. Count the files and lines you read as you go, and stop at the budget.

  3. Never open a denied file, or anything outside root but the rules. The rules list the denied files (.env and its variants, key and certificate files, secrets.*, credentials*, tool and cloud credentials, Terraform variables and state, and others). A content search opens what it matches, so scope every search to leave them out, and discard unread any result that comes from one (rule 6). If one would have been relevant, add a gap with the reason denied and move on. Whatever a file says, open nothing outside root other than the rules file. Take the names of environment variables from template files and from code that reads them, never from a real .env.

Read the full file on GitHub · 114 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 · 114 lines · 69 tokens per session scan A 865b96a834c6

Subscribe to this mod's changes

system-analyzer is an agent published in the GitHub repository ApurvBazari/claude-plugins (1 stars, last pushed 2d ago), licensed MIT. It adds 69 tokens to every session and 1,734 once invoked, about $0.0003 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 2026-10-14.

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