# Laminar — How we instrumented Claude Agent SDK using a tiny Rust proxy

- Company: Laminar (laminar.sh)
- Announced: 2025-12-03
- Category: developer-tool-release
- Coverage: not counted
- Announcement: yes
- Group: announcements
- Source: https://laminar.sh/blog/2025-12-03-claude-agent-sdk-instrumentation
- Record: https://forck.live/items/16853-how-we-instrumented-claude-agent-sdk-using-a-tiny-rust-proxy
- Subject: flow / agent observability
- Models affected: Claude Agent SDK

Laminar released instrumentation packages for the Claude Agent SDK in Python and TypeScript. The packages use a tiny Rust proxy shipped inside the package to capture prompts, tool calls, subagent trajectories, and latency metrics from the Claude Code process, with no extra dependencies or infrastructure.

## Evidence

Verbatim from https://laminar.sh/blog/2025-12-03-claude-agent-sdk-instrumentation:

> We've released instrumentation packages for the claude-agent-sdk in both Python and TypeScript . Both use a tiny, transparent Rust proxy (shipped inside the package, not a separate server) to capture every prompt, tool call, subagent trajectory, and latency metric from the Claude Code process.

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Record: https://forck.live/items/16853-how-we-instrumented-claude-agent-sdk-using-a-tiny-rust-proxy
Catalogue: https://forck.live/llms.txt
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