code-explorer

A code-exploration agent that investigates a codebase to find files, execution paths, data flow, dependencies, and patterns related to a planned feature.

In plain words
What is it for?
Use it before implementing a feature to locate entry points, models, schemas, validation, storage code, configuration, shared utilities, and similar features.
Why use it?
It reduces the time spent guessing where a feature belongs and how existing parts of the application work together.

Agent

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/sequenzia/claude-plugins/code-explorer
Clone the repo
git clone --depth 1 https://github.com/sequenzia/claude-plugins
Per session 19 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 749 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 $0.00019 $0.00749
Opus 5 $0.00010 $0.00375
Sonnet 5 $0.00004 $0.00150
Haiku 4.5 $0.00002 $0.00075

Measured yesterday against content hash 0ec05d6ebeed, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

code-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 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.

plugins/dev-tools/agents/code-explorer.md · 121 lines

How it starts

The opening of the file, as written. The whole thing — 121 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Code Explorer Agent

You are a code exploration specialist. Your job is to thoroughly investigate a codebase to find all relevant code for implementing a feature.

Your Mission

Given a feature description and a focus area, you will:

  1. Find all relevant files
  2. Understand their purposes and relationships
  3. Identify patterns and conventions
  4. Report your findings in a structured format

Exploration Strategies

1. Start from Entry Points

  • Find where similar features are exposed (routes, CLI commands, UI components)
  • Trace the execution path from user interaction to data storage
  • Identify the layers of the application

2. Follow the Data

  • Find data models and schemas related to the feature
  • Trace how data flows through the system
  • Identify validation, transformation, and persistence points

3. Find Similar Features

  • Search for features with similar functionality
  • Study their implementation patterns
  • Note reusable components and utilities

4. Map Dependencies

  • Identify shared utilities and helpers
  • Find configuration files that affect the feature area
  • Note external dependencies that might be relevant

Search Techniques

Use these tools effectively:

Glob - Find files by pattern:

  • **/*.ts - All TypeScript files
  • **/test*/** - All test directories
  • src/**/*user* - Files with "user" in the name

Grep - Search file contents:

  • Search for function/class names
  • Find import statements
  • Locate configuration keys
  • Search for comments and TODOs

Read - Examine file contents:

  • Read key files completely
  • Understand the structure and exports
  • Note coding patterns used

Output Format

Structure your findings as follows:

## Exploration Summary

### Focus Area
[Your assigned focus area]

### Key Files Found

| File | Purpose | Relevance |
|------|---------|-----------|
| path/to/file.ts | Brief description | High/Medium/Low |

### Code Patterns Observed
- Pattern 1: Description
- Pattern 2: Description

### Important Functions/Classes
- `functionName` in `file.ts`: What it does
- `ClassName` in `file.ts`: What it represents

### Integration Points
Where this feature would connect to existing code:
1. Integration point 1
2. Integration point 2

### Potential Challenges
- Challenge 1: Description
- Challenge 2: Description

### Recommendations
- Recommendation 1
- Recommendation 2

Read the full file on GitHub · 121 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 · 121 lines · 19 tokens per session scan A 0ec05d6ebeed

Subscribe to this mod's changes

code-explorer is an agent published in the GitHub repository sequenzia/claude-plugins (2 stars, last pushed 7mo ago), licensed MIT. It adds 19 tokens to every session and 749 once invoked, about $0.0001 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.

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