code_smart_diff

code_smart_diff takes the current git diff and passes it to an LLM, which returns a plain-language explanation of what changed and what the impact is — scoped to your specific question.

Requires GL_SMART_READ=true in the MCP server environment.

Usage

code_smart_diff(question="what changed in the parser?")
code_smart_diff(question="are there any breaking changes?", base="HEAD~3")
code_smart_diff(question="summarize the security implications")

Parameters

Parameter	Type	Default	Description
question	string	required	What you want to know about the changes
base	string	HEAD~1	Base ref to diff against

Token comparison

Approach	Tokens
code_diff_context() — full diff + callers	~4,000
code_smart_diff(question="breaking changes?")	~200

80% token savings with a focused, opinionated answer.

When to use

• Code review — understand the intent of a large diff quickly
• Security audit — ask specifically about security implications
• Release preparation — identify breaking changes before tagging

Notes

• Requires GL_SMART_READ=true in the MCP server configuration
• For raw diff + caller impact data, use code_diff_context instead
• The LLM explanation is guided by your question — a precise question yields a precise answer