Terminal-based AI coding agent with interactive TUI for autonomous code generation.

Features:
  - Interactive TUI with React/Ink
  - Autonomous agent with tool calls (bash, read, write, edit, glob, grep)
  - Permission system with pattern-based rules
  - Session management with auto-compaction
  - Dual providers: GitHub Copilot and Ollama
  - MCP server integration
  - Todo panel and theme system
  - Streaming responses
  - GitHub-compatible project context

src/constants/diff.ts

@@ -0,0 +1,13 @@
+/**
+ * Diff utility constants
+ */
+
+// Default context lines for hunks
+export const DIFF_CONTEXT_LINES = 3;
+
+// Line type prefixes
+export const LINE_PREFIXES = {
+  add: "+",
+  remove: "-",
+  context: " ",
+} as const;