Claude Hindsight: Observability Tool for Claude Code Sessions
What Claude Hindsight Does
Claude Hindsight is an observability tool built specifically for Claude Code sessions. It captures every tool call, every token, and every error from your Claude Code interactions and turns them into an explorable dashboard. The tool provides visibility into what Claude Code is actually doing during development sessions.
Key Details from the Source
The creator used Claude Hindsight to refactor their open-source project from proof-of-concept to production-ready in a single Claude Code conversation. The session involved:
- 78 conversation turns
- 733 tool calls
- 11 hours of continuous work
- $370 in Claude Code usage
- 692.8M cache read tokens
- Code changes: +9,915 lines added, -2,962 lines removed
The creator built Claude Hindsight for the Anthropic community and then used it to rebuild itself, creating a feedback loop where the monitoring tool helped build the monitoring tool.
Practical Benefits
When something broke during development, the creator could see exactly which tool call failed and why. For code quality auditing, they could browse every Read, Edit, and Bash call Claude made. To verify refactors didn't break anything, they could open the session in Chrome and click through nodes in the dashboard.
Technical Details
Claude Hindsight is:
- Open source
- Single binary
- Built with Rust and React
- Available via Homebrew:
brew tap codestz/tapfollowed bybrew install claude-hindsight
The GitHub repository contains the full source code and the pull request showing the refactoring work: https://github.com/codestz/claude-hindsight/pull/34
This type of observability tool addresses a growing need for visibility into AI coding agent sessions, allowing developers to understand exactly what's happening during complex refactoring or development sessions.
📖 Read the full source: r/ClaudeAI
👀 See Also
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OpenClaw Benchmark Shows Qwen3.5:27B Outperforms Other Local LLMs for Agent Tasks
A benchmark of 7 local LLMs on 22 real agent tasks using OpenClaw found qwen3.5:27b-q4_K_M scored 59.4%, while the runner-up qwen3.5:35b scored only 23.2%. Most models couldn't find basic tools like email functions.
RelayPlane Open Source Proxy Shows 73% Cost Reduction with Claude Model Routing
RelayPlane, an open source npm-native proxy for the Anthropic API, demonstrated 73.4% cost savings in benchmarks by routing requests to appropriate Claude models based on complexity. The tool reduced cost per 10 requests from $0.0323 to $0.0086 while improving p50 latency from 1.55s to 0.78s.
Heddle: Trust Enforcement and Audit Logging for Claude Desktop MCP Connections
Heddle is an open-source tool that adds trust tiers, access controls, and audit logging to Claude Desktop's MCP connections, allowing secure management of multiple services through a single interface with six starter packs included.