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Built-in Tools

OpenCode has some built-in tools that you don't need to install yourself. The most important ones for day-to-day coding are:

read, glob, and grep for gathering context
edit, write, and patch for changing files
shell for running commands
webfetch and websearch for fetching pages and searching online
question for asking you clarifying questions (which displays a custom selector UI)
skill for loading reusable SKILL.md files (we'll cover these later)

A good agent harness makes it seem like the LLM is interacting directly with files and tools on the system, but it's still ultimately just text-in, text-out!

Assignment

Watch OpenCode use its tools to add a precedence test for Sloperator, meaning mathematical operations happen in the correct order. For example, 2 + 5 * 3 should evaluate to 17, not 21 (multiply first).

Tell OpenCode to find where Sloperator decides that * happens before +, and to add a test in tests/test_precedence.py confirming that multiplication happens before addition.
Watch which tools it uses to find, read, and change the code.

Tell OpenCode to run and submit the CLI tests from the project root.