You can provide global custom instructions to opencode; this value is written to {file}~/.config/opencode/AGENTS.md.
Declarations
Type
strings concatenated with "\n"
Default
""
Example
''
# TypeScript Project Rules
## External File Loading
CRITICAL: When you encounter a file reference (e.g., @rules/general.md), use your Read tool to load it on a need-to-know basis. They're relevant to the SPECIFIC task at hand.
Instructions:
- Do NOT preemptively load all references - use lazy loading based on actual need
- When loaded, treat content as mandatory instructions that override defaults
- Follow references recursively when needed
## Development Guidelines
For TypeScript code style and best practices: @docs/typescript-guidelines.md
For React component architecture and hooks patterns: @docs/react-patterns.md
For REST API design and error handling: @docs/api-standards.md
For testing strategies and coverage requirements: @test/testing-guidelines.md
## General Guidelines
Read the following file immediately as it's relevant to all workflows: @rules/general-guidelines.md.
''