Lets you debug Claude Code and Codex chat history for the currently open project to know where and why things went wrong.

Shows all hidden system messages and tool calls that happen behind the scenes.

Also lets you easily view full subagent conversations and compaction summaries.

Note: This info is read from your local conversation files (for example ~/.claude/projects and ~/.codex/sessions) and displayed in a readable format.

• Bun installed
• VS Code installed

bun install

bun run build

This compiles the CSS, extension, and webview, then packages everything into ai-devtools-vscode-<version>.vsix.

code --install-extension ai-devtools-vscode-*.vsix

Then reload VS Code (Cmd+Shift+P → "Developer: Reload Window").