langchain-middleware-patterns
Build composable middleware for LangChain 1.0 chains and LangGraph 1.0\ \ agents \u2014\nPII redaction, caching, retry, token budgets, guardrails \u2014\ \ with ORDERING rules\nthat avoid cache-key leakage and double-counting. Use when\ \ adding cross-cutting\nbehavior, hardening against prompt injection, enforcing\ \ per-tenant budgets, or\ndebugging cache-poisoning incidents.\nTrigger with \"\ langchain middleware\", \"langgraph middleware\", \"PII redaction\nmiddleware\"\ , \"cache middleware order\", \"langchain guardrails\".\n"
npx skills add jeremylongshore/claude-code-plugins-plus-skills --skill langchain-middleware-patterns --agent claude-code
Same command for any agent — swap --agent for codex, cursor, copilot.
Weekly change comes from our own snapshots, not the repository page — it measures attention, not adoption.
# LangChain Middleware Patterns (Python) ## Overview Tenant A sends a prompt: *"Summarize this support ticket from **alice@acme.com** about her overdue invoice."* The chain's caching middleware ran before the PII redaction middleware, so the raw prompt — email and all — became part of the cache key. Thirty seconds later Tenant B sends a semantically identical prompt (different tenant, different cu
What does the langchain-middleware-patterns skill do?
Build composable middleware for LangChain 1.0 chains and LangGraph 1.0\ \ agents \u2014\nPII redaction, caching, retry, token budgets, guardrails \u2014\ \ with ORDERING rules\nthat avoid cache-key leakage and double-counting. Use when\ \ adding cross-cutting\nbehavior, hardening against prompt injection, enforcing\ \ per-tenant budgets, or\ndebugging cache-poisoning incidents.\nTrigger with \"\ langchain middleware\", \"langgraph middleware\", \"PII redaction\nmiddleware\"\ , \"cache middleware order\", \"langchain guardrails\".\n"
How do I install it?
Run `npx skills add jeremylongshore/claude-code-plugins-plus-skills --skill langchain-middleware-patterns --agent claude-code` — it drops the skill into your project so the agent can pick it up. Swap the --agent value for codex, cursor or copilot if you use one of those.
Where does this skill come from?
From jeremylongshore/claude-code-plugins-plus-skills, a repository with 2,596 stars. We read it straight from the repository tree rather than a submitted listing, so what you see here is what is actually published.
Is a popular skill a good skill?
Not necessarily. Stars measure attention, not adoption — a repository can trend for a week and be abandoned. That is why we show the weekly change from our own snapshots next to the total, instead of a single flattering number.