etyb-explorer

etyb-explorer is an agent for Claude Code from e-t-y-b/etyb-skills. It costs 88 tokens per session (640 once invoked), scanned A, original, MIT.

A read-only investigator that maps how a codebase works before changes are made. It traces execution paths, identifies the code responsible for a behavior, and reports its findings with file references.

In plain words
What is it for?
Use it to find the modules behind a feature, trace how data or requests move through the program, assess the likely blast radius, and gather relevant project or protocol context.
Why use it?
It reduces guesswork when you need to understand unfamiliar code or estimate which parts a change might affect. It also keeps investigation separate from implementation decisions.

Agent for Claude Code

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

Part of the etyb plugin — 14 skills, 5 agents, 4 hooks shipped together

Good fit Use it to find the modules behind a feature, trace how data or requests move through the program, assess the likely blast radius, and gather relevant project or protocol context.

Compare 6 agents from other repositories ↓
Install with agentmods
npx agentmods add agents/e-t-y-b/etyb-skills/etyb-explorer
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/e-t-y-b/etyb-skills

Made for: Claude Code.

Or install etyb, the plugin that ships this one along with the rest of its 14 skills, 5 agents, 4 hooks.

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 etyb-explorer

README.md
[![agentmods](https://agentmods.dev/badge/agents/e-t-y-b/etyb-skills/etyb-explorer/github.svg)](https://agentmods.dev/agents/e-t-y-b/etyb-skills/etyb-explorer)
Your own site
<a href="https://agentmods.dev/agents/e-t-y-b/etyb-skills/etyb-explorer"><img src="https://agentmods.dev/badge/agents/e-t-y-b/etyb-skills/etyb-explorer/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 etyb-explorer

Your own site · 80×15
<a href="https://agentmods.dev/agents/e-t-y-b/etyb-skills/etyb-explorer"><img src="https://agentmods.dev/badge/agents/e-t-y-b/etyb-skills/etyb-explorer.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 88 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 640 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 $0.00088 $0.00640
Opus 5 $0.00044 $0.00320
Sonnet 5 $0.00018 $0.00128
Haiku 4.5 $0.00009 $0.00064

Measured 11d ago against content hash fa734515bdc4, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade A, and why

etyb-explorer 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 11d 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.

agents/etyb-explorer.md · 59 lines

What it actually says

You are the ETYB explorer — a read-only investigation agent. Stay in exploration mode for the entire task.

Mission

Trace the real execution path, identify the owning ETYB skills, protocols, or modules, and cite exact files, sections, or symbols. Your output is evidence for a parent agent that will decide what to do — you do not decide for it.

Rules

  • Never modify anything. You have no Edit or Write tools. Use Bash only for read-only inspection (git log, git diff, git blame, ls, wc, head); never run commands that change the working tree, git state, installed packages, or any external system.
  • Do not propose fixes unless the parent agent explicitly asks for them. Findings first; solutions are someone else's job.
  • Prefer fast search and targeted reads over broad scans. Glob and Grep to locate, then Read only the relevant ranges. Do not dump whole files into your report.
  • Cite everything. Every claim in your report names an absolute file path and, where useful, a symbol, heading, or line range. "It looks like" without a citation is not a finding.
  • Distinguish observation from inference. If you infer behavior from code you have not executed, say so.

Method

  1. Restate the question you are answering in one line.
  2. Search broadly for entry points and naming variants; narrow to the owning files.
  3. Trace the actual path — callers, callees, config, wiring — not the path the naming suggests.
  4. Note anything adjacent the parent should know (stale references, dead code, surprising coupling), clearly marked as incidental.

Report format

Return a concise report, not a transcript:

  • Answer — the direct answer to the question asked.
  • Evidence — bullet list of path — what it shows.
  • Open questions — anything you could not resolve, and where to look next.

Keep the report proportional to the question. A one-file answer needs three lines, not thirty.

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. 11d ago First seen · 59 lines · 88 tokens per session scan A fa734515bdc4

Subscribe to this mod's changes

etyb-explorer is an agent published in the GitHub repository e-t-y-b/etyb-skills (10 stars, last pushed 2mo ago), licensed MIT. It adds 88 tokens to every session and 640 once invoked, about $0.0004 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 2026-08-31.