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Use to do a thorough exploration of an existing codebase. Always use this when asked to explore a codebase/repo/project. Always use it when starting a task that requires deep knowledge of the codebase. Don't use for quick lookups or single-file questions.
Codex または Claude でインストール この Prompt をコピーして Codex、Claude、または他のアシスタントに貼り付けると、Skill ページを確認してインストールできます。
SOC 職業分類に基づく
Use when converting files to Markdown format for LLM consumption, document analysis, or text extraction. Supports PDF, Office documents, images, audio, HTML, and more via Microsoft's markitdown. Don't use for simple text file reads, existing Markdown files, or when the file is in a usable format.
Use when creating or modifying custom opencode commands in the `commands/` directory. Covers markdown command files, frontmatter options (description, agent, model, subtask), prompt templates with $ARGUMENTS, shell output injection, and file references.
Use when rendering mermaid diagrams to PNG, SVG, or PDF images. Handles both .mmd files and inline mermaid code blocks in markdown files. Don't use for creating mermaid syntax or GraphViz/DOT diagrams.
Use when creating a comprehensive architecture document for a codebase. First explores the codebase using the exploring-code skill, then writes a detailed architecture document. Don't use for quick documentation lookups or single-file questions: only use when asked to create or update architectural documents.
You MUST use when creating, modifying, or reviewing GitHub Actions workflow files. For security reasons it is VITAL that you use this skill when working with third party actions (including `actions/checkout` and other official actions).
Use when parsing, querying, transforming, or extracting data from JSON files, API responses, or JSON streams. Always use the `jq` CLI for all JSON operations. Do not use for YAML, XML, CSV, or plain-text parsing. Never build JSON from scratch in Python, Node, or other languages when `jq` can handle it.
| name | exploring-code |
| description | Use to do a thorough exploration of an existing codebase. Always use this when asked to explore a codebase/repo/project. Always use it when starting a task that requires deep knowledge of the codebase. Don't use for quick lookups or single-file questions. |
| license | MIT |
| metadata | {"author":"Robert Hafner","source":"https://github.com/tedivm/opencode-config"} |
Launch a subagent to explore the target codebase. The subagent follows a structured workflow: documentation first, then tests, then source code. It returns a dense overview covering architecture, key modules, patterns, and potential concerns.
Identify the target — Confirm the root directory and scope with the user. If exploring the current workspace, use its root.
Launch the subagent — Use the task tool with subagent_type: explore and a prompt that includes the full exploration checklist below. Set description to something like "Explore codebase structure and architecture."
The subagent executes this checklist:
## Exploration Checklist
### Phase 1: Documentation and Entry Points
- [ ] Read README.md (or primary README) for project overview, setup instructions, and high-level architecture
- [ ] Read any additional documentation: CONTRIBUTING.md, ARCHITECTURE.md, docs/, guides/, etc.
- [ ] Check package.json / Cargo.toml / go.mod / pyproject.toml / Cargo.lock for dependencies and their roles
- [ ] Identify the project language, framework, and build system
### Phase 2: Project Structure
- [ ] Map the top-level directory structure
- [ ] Identify key directories: src/, lib/, core/, api/, components/, tests/, scripts/, config/
- [ ] Note the file organization pattern (by feature, by layer, by type)
- [ ] Identify entry points: main files, CLI entry points, server startup files, index files
### Phase 3: Tests
- [ ] Find test directories and test file patterns
- [ ] Read test structure to understand what is tested and testing conventions
- [ ] Note test frameworks used and any test utilities or fixtures
- [ ] Identify gaps: areas with no test coverage
### Phase 4: Source Code Deep Dive
- [ ] Read entry points and bootstrap code
- [ ] Trace the main execution flow from entry point through key modules
- [ ] Identify core abstractions, interfaces, and data models
- [ ] Map dependencies between modules (what imports what)
- [ ] Note architectural patterns used (MVC, layered, event-driven, microservices, etc.)
- [ ] Identify configuration systems and how settings are loaded
- [ ] Note error handling patterns and logging approaches
### Phase 5: Integration Points
- [ ] Identify external dependencies: APIs, databases, message queues, file systems
- [ ] Find configuration files: .env examples, config files, deployment configs
- [ ] Check for CI/CD pipelines: GitHub Actions, Makefiles, build scripts
- [ ] Note deployment patterns and infrastructure requirements
### Phase 6: Synthesis
- [ ] Produce a comprehensive overview as a direct message back to the primary agent (do NOT save any document to disk):
- Project purpose and what it does
- High-level architecture diagram (text-based)
- Key modules and their responsibilities
- Data flow and execution paths
- Technology stack and notable dependencies
- Testing strategy and coverage notes
- Code organization patterns and conventions
- Potential concerns, technical debt, or areas needing attention
Use this as the prompt when launching the explore subagent:
Thoroughly explore the codebase at [WORKSPACE_ROOT]. Follow this structured approach:
1. START with documentation: README, CONTRIBUTING, any docs/ directory, package config files
2. MAP the directory structure: identify key directories, entry points, organization patterns
3. REVIEW tests: find test files, understand testing approach, note coverage gaps
4. DEEP DIVE into source: trace execution flow, identify core abstractions, map module dependencies, note architectural patterns
5. IDENTIFY integration points: external APIs, databases, config systems, CI/CD
6. SYNTHESIZE everything into a comprehensive overview
Return a dense, well-structured report as your final output message — do NOT save any document to disk. Cover: project purpose, architecture, key modules, data flow, tech stack, testing, conventions, and any concerns or technical debt. Be specific — name files, functions, and patterns you find.
timeout parameter on the task tool if needed.