LangWatch adds session replay, tool-call tracking, and cost visibility for coding agents

_rchaves_ · x · 2026-07-29

The post introduces npx langwatch claude, a free-for-individuals observability tool for AI coding-agent sessions.

It tracks the actual cost of each session, cache reads and writes, every tool call, token usage, full terminal replay, and the exact moment the agent started going off the rails. The author says it also works with OpenAI Codex, Gemini CLI, and OpenCode, and argues that watching agent behavior should become standard before the tokens eat the budget.

Related event: LangWatch Introduces Usage Tracking for Claude Code(2 posts)→

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