OpenCode

Generates complete code implementations from natural language requirements by decomposing tasks into subtasks, maintaining context across multiple generation steps, and iteratively refining outputs based on intermediate validation. Uses an agentic loop pattern where the AI reasons about what code to write, generates it, and validates against the original intent before returning final implementations.

Maintains awareness of the existing codebase by retrieving relevant code files, function signatures, and architectural patterns to inject into the generation context. Uses semantic or syntactic indexing to identify related code sections that should inform new code generation, ensuring generated code follows existing conventions and integrates properly with the codebase.

Breaks down complex coding tasks into sequential subtasks with explicit dependencies and execution order, creating an execution plan that the agent follows step-by-step. Uses planning algorithms to identify task dependencies, determine optimal execution order, and track completion state across multiple generation and validation cycles.

Validates generated code against specifications through automated testing, linting, type checking, and semantic analysis, then iteratively refines implementations based on validation failures. The agent receives validation feedback and regenerates or modifies code to fix issues, repeating until validation passes or max iterations reached.

Enables the agent to call external tools and APIs (file operations, package managers, build systems, testing frameworks) as part of code generation and validation workflows. Implements function calling with schema-based tool definitions, allowing the agent to invoke tools, receive results, and incorporate tool outputs into subsequent reasoning and code generation steps.

Generates code in multiple programming languages (Python, JavaScript, TypeScript, Go, Rust, etc.) while respecting language-specific idioms, conventions, and best practices. Uses language-specific templates, AST patterns, and style guides to ensure generated code follows each language's conventions rather than producing generic or language-agnostic code.

Persists agent execution state (task progress, generated code, validation results, context) to enable resuming interrupted workflows without losing progress. Implements state serialization and recovery mechanisms that allow long-running code generation tasks to be paused and resumed, with full context restoration.