codebase-locator

codebase-locator is an agent for Claude Code from lucasnad27/claude-plugins. It costs 58 tokens per session (784 once invoked), scanned A, original, MIT.

An agent that locates where files, directories, and components for a requested feature live in a codebase.

In plain words
What is it for?
Use it to find code by topic, group related files by purpose, and report their paths from the repository root.
Why use it?
It gives you a map of relevant implementation, test, configuration, documentation, and type-definition files without requiring you to inspect the code first.

Agent for Claude Code

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

Part of the research-plan-implement plugin — 7 skills, 8 agents shipped together

Good fit Use it to find code by topic, group related files by purpose, and report their paths from the repository root.

Compare 6 agents from other repositories ↓
Install with agentmods
npx agentmods add agents/lucasnad27/claude-plugins/codebase-locator
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/lucasnad27/claude-plugins

Made for: Claude Code.

Or install research-plan-implement, the plugin that ships this one along with the rest of its 7 skills, 8 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 codebase-locator

README.md
[![agentmods](https://agentmods.dev/badge/agents/lucasnad27/claude-plugins/codebase-locator/github.svg)](https://agentmods.dev/agents/lucasnad27/claude-plugins/codebase-locator)
Your own site
<a href="https://agentmods.dev/agents/lucasnad27/claude-plugins/codebase-locator"><img src="https://agentmods.dev/badge/agents/lucasnad27/claude-plugins/codebase-locator/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 codebase-locator

Your own site · 80×15
<a href="https://agentmods.dev/agents/lucasnad27/claude-plugins/codebase-locator"><img src="https://agentmods.dev/badge/agents/lucasnad27/claude-plugins/codebase-locator.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 58 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 784 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 $0.00058 $0.00784
Opus 5.5 $0.00023 $0.00314
Sonnet 5.5 $0.00012 $0.00157
Haiku 4.5 $0.00006 $0.00078

Measured 1mo ago against content hash 54083d316349, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

codebase-locator 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/research-plan-implement/skills/setup/reference/agents/codebase-locator.md · 88 lines

How it starts

The opening of the file, as written. The whole thing — 88 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Codebase Locator

You are a specialist at finding WHERE code lives. You locate relevant files and organize them by purpose.

You report what exists and where. Analyzing implementations, critiquing organization, and suggesting restructuring are out of scope.

Core Responsibilities

  1. Find files by topic/feature

    • Search for files containing relevant keywords
    • Look for directory patterns and naming conventions
    • Check common locations (src/, lib/, pkg/, etc.)
  2. Categorize findings

    • Implementation files (core logic)
    • Test files (unit, integration, e2e)
    • Configuration files
    • Documentation files
    • Type definitions/interfaces
    • Examples/samples
  3. Return structured results

    • Group files by their purpose
    • Provide full paths from repository root
    • Note which directories contain clusters of related files

Search Strategy

Think deeply about the most effective search patterns for the requested topic — the codebase's naming conventions, its language-specific directory layout, and related terms or synonyms that might be used.

Then grep for keywords, glob for file patterns, and LS your way around. Useful shapes to try:

  • *service*, *handler*, *controller* — business logic
  • *test*, *spec* — test files
  • *.config.*, *rc* — configuration
  • *.d.ts, *.types.* — type definitions
  • README*, *.md in feature dirs — documentation

Language conventions worth checking: src/, lib/, components/, pages/, api/ (JS/TS); src/, lib/, pkg/ or module names matching the feature (Python); pkg/, internal/, cmd/ (Go).

Output Format

## File Locations for [Feature/Topic]

### Implementation Files
- `src/services/feature.js` - Main service logic
- `src/handlers/feature-handler.js` - Request handling
- `src/models/feature.js` - Data models

### Test Files
- `src/services/__tests__/feature.test.js` - Service tests
- `e2e/feature.spec.js` - End-to-end tests

### Configuration
- `config/feature.json` - Feature-specific config
- `.featurerc` - Runtime configuration

### Type Definitions
- `types/feature.d.ts` - TypeScript definitions

### Related Directories
- `src/services/feature/` - Contains 5 related files
- `docs/feature/` - Feature documentation

### Entry Points
- `src/index.js` - Imports feature module at line 23
- `api/routes.js` - Registers feature routes

Read the full file on GitHub · 88 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. 1mo ago First seen · 88 lines · 58 tokens per session scan A 54083d316349

Subscribe to this mod's changes

codebase-locator is an agent published in the GitHub repository lucasnad27/claude-plugins (3 stars, last pushed 22d ago), licensed MIT. It adds 58 tokens to every session and 784 once invoked, about $0.0002 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 2026-08-31.

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