Claude Esp Rs

claude-esp-rs

[](https://crates.io/crates/claude-esp)

Stream Claude Code's hidden output (thinking, tool calls, subagents) to a separate terminal in real-time.


**Note:** This is a Rust port of the [Go version](https://github.com/phiat/claude-esp). The binary is named `claude-esp-rs` to allow running both versions side-by-side.

The Problem

When using Claude Code interactively, tool outputs and thinking are collapsed by default and require pressing `Ctrl+O` to toggle visibility. This tool lets you watch all that output in a **separate terminal** with a nice TUI, without interrupting your main Claude Code session.

Features

• Multi-session support - Watch all active Claude sessions simultaneously
• Hierarchical tree view - Sessions with nested Main/Agent nodes
• Real-time streaming - See thinking, tool calls, and outputs as they happen
• Subagent tracking - Automatically discovers and displays subagent activity
• Session events - Compaction boundaries, hook output, post-edit LSP diagnostics, PR-link events, prompt-cache misses (with reason + extra tokens), queue operations, slash-command invocations, transient notices, killed-subagent markers, plan/auto mode transitions, and skill/MCP/tool deltas surfaced inline
• Agent type labels - Shows agent types (Explore, code-reviewer, etc.) from .meta.json
• Token usage tracking - Cumulative input/output token counts in the header bar
• Per-agent context size - Each Main/subagent row shows current context as a percentage of the model's max context window (Main 18%, Explore 9%). Denominator is the model's max window (1M for the Claude 5 family and opus-4-6 through 4-8 / sonnet-4-6, 200k for haiku-4-5), not the auto-compact threshold
• Tool execution duration - Shows how long each tool call took
• Background task visibility - See background tasks (⏳/✓) under