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LangChain chain and agent hardening v1.0.0

Use this resource to harden a LangChain chain or agent against prompt injection and data leaks

New

  • 544 downloads
  • 150 likes
  • 134 saves

Free

Install with the CLI

In a terminal, from the folder you want:

npx --yes palatekit@latest install langchain-security-hardening

With no option, the skill goes to ~/.agents/skills/; add --agent claude-code (or codex, cursor…) to target an agent.

First time: connect the CLI with

npx --yes palatekit@latest login

The agent wraps user input in XML tags, enforces a tool allowlist, redacts personal data before cache and traces, validates outputs with Pydantic and moves secrets into a secret manager. You get a base ready for a security review.

Mostly picked by

Updated November 2, 2026

Card for the “LangChain chain and agent hardening” skill

Details

Works in
Install guides
Generates with
Your agent's model
Licence
MIT

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What you get

  • SKILL.md: XML tags, tool allowlist, redaction and validation
  • references/prompt-injection-defenses.md: prompt injection defenses
  • references/tool-allowlist-enforcement.md: allowlist enforcement
  • references/secrets-lifecycle.md: secrets lifecycle

Good fit for

  • You are preparing a security review before launch
  • Your RAG chain ingests documents uploaded by users

Not for

    Tags

    • langchain
    • security
    • prompt injection
    • personal data

    About

    You say

    “Harden my RAG chain so user-uploaded PDFs cannot trigger any tool.”

    Card for the “LangChain chain and agent hardening” skill

    Skill published by Jeremy Longshore <jeremy@intentsolutions.io> under the MIT license, delivered in its original version.

    Show more

    How to use it

    1. Install the skill in your agent's skills folder
    2. Ask your agent to harden a LangChain chain or agent against prompt injection and data leaks
    3. Review and adjust the result

    Content preview

    Files

    • LICENSE1.1 KB
    • NOTICE-PALATEKIT.md0.5 KB
    • references/compliance-posture.md8.6 KB
    • references/one-pager.md4.9 KB
    • references/prompt-injection-defenses.md6.8 KB
    • references/secrets-lifecycle.md6.4 KB
    • references/tool-allowlist-enforcement.md6.7 KB
    • SKILL.md17.2 KB

    Origin and licence

    Listed unmodified

    Author
    Jeremy Longshore <jeremy@intentsolutions.io>
    Source
    github.com/jeremylongshore/tons-of-skills-marketplace/tree/ab85a061f7bcc039dac13ee193de7a4cd4388571/skills/.curated/langchain-security-basics
    Licence
    MIT

    Notice

    « langchain-security-basics » (Jeremy Longshore <jeremy@intentsolutions.io>, MIT) livré dans sa version d'origine : fiche en français et en anglais par PalateKit.

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