langchain-middleware agent skill by langchain-ai
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.
Source and license
| Publisher | langchain-ai |
|---|---|
| Repository | langchain-ai/langchain-skills |
| License | MIT |
| Snapshot | 2026-10-22 |
| Last repository commit | 2026-10-02 |
| Instruction size | 1,126 words; 396 lines |
| Bundled files | 1 |
Suede Skill Check: 77/100 · C
Report snapshot · · graded-v2
The rubric totals 100 points; published scores are capped at 99. Security scan: not scanned.
Source revision: 16a992f09ab3. Report version f65c0f07aa83. Badge URLs follow the latest listing; save the report to keep this version.
Download report · Request a fresh review
What to review next
- Boundary clause: 0 of 4 points. 4 when the description says when not to use the skill (“Not for …”, “Do not use …”, “Use … instead”).
- Example request: 0 of 3 points. 3 when the description quotes an example request (3–60 characters in quotation marks).
- Reference files: 0 of 3 points. 3 when the skill folder ships a references/, reference/ or docs/ folder.
Add declarations and bundled files when they describe the skill’s actual needs. Update the source, then request a fresh review with the changed commit or PR.
| Component | Points earned | Available |
|---|---|---|
| Structural checks | 56 | 56 |
| Description length | 5 | 5 |
| Boundary clause | 0 | 4 |
| Example request | 0 | 3 |
| Instruction depth | 7 | 7 |
| Reference files | 0 | 3 |
| Bundled scripts | 0 | 2 |
| Recent maintenance | 9 | 9 |
| Curated-list citations | 0 | 7 |
| Tool permissions declared | 0 | 2 |
| Compatibility declared | 0 | 2 |
The published score is capped at 99. It measures the published files, documentation and maintenance signals. Security scan: not scanned. This assessment does not include a runtime test or a full installation-dependency review.
Install langchain-middleware
The skills CLI works with Claude Code, Codex, Cursor and other agents; the other routes copy the folder by hand.
npx skills add https://github.com/langchain-ai/langchain-skills/tree/main/config/skills/langchain-middlewaretmp="$(mktemp -d)"
git clone --depth 1 https://github.com/langchain-ai/langchain-skills.git "$tmp/repo"
mkdir -p .claude/skills
cp -R "$tmp/repo/"config/skills/langchain-middleware .claude/skills/
rm -rf "$tmp"tmp="$(mktemp -d)"
git clone --depth 1 https://github.com/langchain-ai/langchain-skills.git "$tmp/repo"
mkdir -p .agents/skills
cp -R "$tmp/repo/"config/skills/langchain-middleware .agents/skills/
rm -rf "$tmp"For a user-level install, copy the folder to ~/.claude/skills/ (Claude Code) or ~/.agents/skills/ (Codex). Inside Codex, $skill-installer can also fetch a skill from GitHub. New to skills? Read How to install agent skills in Claude Code, Codex and Cursor.
langchain-ai/langchain-skills is third-party code. Read SKILL.md and any bundled scripts before you install it.
Show the listing and raise the score
langchain-middleware is listed with 77/100 · C. This badge links to its Suede AI listing. Skills scoring 80–99 add a numeric and a letter quality shield; the largest open points for langchain-middleware are boundary clause (4), example request (3) and reference files (3). Send your repository and the points you want to raise, then request a fresh review after updating the skill. Publishers: read How to get your agent skill found in search and cited by AI assistants.
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