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langchain-middleware
langchain-ai/langchain-skillsSkill
INVOKE THIS SKILL when you need human-in-the-loop approval, custom middleware, or structured output. Covers HumanInTheLoopMiddleware for human approval of dangerous tool calls, creating custom middleware with hooks, Command resume patterns, and structured output with Pydantic/Zod.
Why this score
This repo hosts 10 skills, so its 1,297 stars are split between them (about 130 each) for scoring.
Popularity score: 70/100 from public GitHub signals only. It shows how widely used and maintained this is, not how well it works. Not included yet: the fake-star check. The security scan is shown separately and doesn't change the score. How we rank
Security
Scanned Oct 21, 2026 at commit 704e9f4a2f96, with Cisco's open-source skill-scanner.
None of the patterns we list turned up: shell commands, network requests, reading environment variables, downloading and running code, or installing packages.
A scan lists patterns in the code. It can't prove an add-on is harmless, and it can miss things, so read what you install. How we scan
Alternatives
Other makers' add-ons that do the same job, next to this one.
| Name | Score | Stars | Context | Updated |
|---|---|---|---|---|
| This onelangchain-middleware langchain-ai/langchain-skills · Skill | 70 | ★ 1.3k | ≈76 always | 16d ago |
| integrate-arcjet-guard-langchain arcjet/arcjet-js · Skill Same job: ai engineering | 66 | ★ 693 | ≈112 always | 16d ago |
| edgeone-makers-middleware TencentEdgeOne/edgeone-makers-tools · Skill Both about middleware | 71 | ★ 1.9k | ≈26 always | 19d ago |
| pydantic-evals Fuenfgeld/pydantic-ai-skills · Skill Same job: ai engineering | 56 | ★ 10 | ≈138 always | 18d ago |
| eval-audit ai-evals-course/evals-skills · Skill Same job: ai engineering | 66 | ★ 1.5k | ≈21 always | 1mo ago |
| harness-eval HKUDS/OpenHarness · Skill Same job: ai engineering | 80 | ★ 16k | ≈74 always | 5mo ago |