agent blocks
Reusable snippets for agent configuration files (CLAUDE.md, codex.md, etc.)
Rules 219 blocks
Rules
Concise directives that shape how your AI agent writes, reviews, and reasons about code.
Code QualityArchitectureTestingSecurityAgent BehaviorFrontendBackendTypeScriptReactPythonDevOpsand more
→ Workflows 82 blocks
Workflows
Step-by-step procedures that tell your agent how to perform a process from start to finish.
DevelopmentCode ReviewTestingGit & WorkflowDeploymentDebuggingDocumentationRefactoringMaintenance
→ What are agent blocks?
Agent blocks are reusable snippets you insert into files like CLAUDE.md, codex.md, or any agent configuration file. They give your AI agent specific instructions — coding standards, behavior rules, architectural guidelines — so it works the way you want, every time.
Browse by category, copy what you need, or download blocks directly into Crystl.