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Flight Log / jlowin/fastmcp #870

Add MCP Middleware — a Claude Code (Anthropic) flight by Jeremiah Lowin

Jeremiah Lowin (@jlowin) opened this Claude Code (Anthropic) pull request in jlowin/fastmcp on Jun 19, 2025; merged clean in 20.6 h, merged by @jlowin: +3,644 −1,929, 32 files, 1 review.

All agent flights in jlowin/fastmcp · Claude Code flights

Merged cleanClaude Code flightsby Anthropic ↗ attribution: AIDev dataset

Flown by Jeremiah Lowin (@jlowin)GitHub ↗— unclaimed

Lines
+3,644 −1,929
Files
32
Commits
18
Reviews
1
To merge
20.6 h
Task
feat

Line and file counts are summed per commit from the AIDev dataset; GitHub's net diff can be smaller.

Claude Code opened a feature PR adding MCP Middleware to the fastmcp repository, letting developers intercept and modify requests and responses. The change touched 32 files with 3644 additions and 1929 deletions across 18 commits. It drew one review round with zero change requests and zero review comments, and merged clean after 20.56 hours.

From the pull request description

## Summary This PR introduces **MCP Middleware** - a powerful new system for adding cross-cutting functionality to FastMCP servers. The middleware system allows developers to intercept, inspect, and modify MCP requests and responses as they flow through the server pipeline. Closes #549 ### Key F…

Excerpt (first 300 characters) — the full description is on GitHub.

View the pull request on GitHub →

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Flight timeline

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  23. Jun 19, 2025mergedjlowin
  24. Jun 19, 2025closedjlowin
  25. Jun 19, 2025labeledjlowin

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Cite this flight: AgentRiders Flight Log, jlowin/fastmcp#870, record updated Nov 3, 2026, https://agentriders.com/logs/jlowin/fastmcp/870/

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