frontmcp-extensibility SKILL.md skillA

frontmcp-extensibility from agentfront/frontmcp is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.

Install it, pinned
mdr add agentfront/frontmcp/frontmcp-extensibility@git:20261011.3484b44

Pins git:20261011.3484b44 in mdr.lock. Pin the fingerprint instead.

Audit grade
A, 17 of 17 checks passed
Kind
SKILL.md skill
Repository
agentfront/frontmcp
Path
libs/skills/catalog/frontmcp-extensibility/SKILL.md
Versions recorded
6
Latest version
git:20261011.3484b44, committed Oct 11, 2026
First version recorded
May 5, 2026
Size
12,889 bytes
Repository stars
148
License
Apache-2.0

Use when extending FrontMCP beyond the core SDK by integrating external npm packages, libraries, or third-party services into providers and tools. Covers VectoriaDB for in-memory semantic and vector search (ML-based embeddings or TF-IDF keyword engines, with persistence) and the tamper-evident, hash-chained skill audit log (pluggable signer and store, with chain verification). Triggers: add semantic search, vector search, embeddings, similarity search, recommendations, ML features, audit…

Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.

What the file says

# FrontMCP Extensibility

Patterns and examples for extending FrontMCP servers with external npm packages. The core SDK handles MCP protocol, DI, and lifecycle — this skill shows how to integrate third-party libraries as providers and tools.

## When to Use This Skill

### Must Use

- Adding semantic search or similarity matching to your server (VectoriaDB)
- Integrating an external npm package as a FrontMCP provider
- Building tools that wrap third-party services (databases, APIs, ML models)

### Recommended

- Looking for patterns to structure external service integrations
- Deciding between provider-based vs direct integration for a library
- Adding capabilities like applescript automation, VM execution, or data processing

### Skip When

- You need to build core MCP components (see `frontmcp-development`)
- You need to configure auth, transport, or CORS (see `frontmcp-config`)
- You need to write a plugin with hooks and context extensions (see `create-plugin`)

> **Decision:** Use this skill when integrating external libraries into your FrontMCP server as providers or tools.

## Prerequisites

- A FrontMCP project (see `frontmcp-setup` if you don't have one).
…

Read the whole file at its exact version.

How to install

The exact contents, by fingerprint
mdr add agentfront/frontmcp/frontmcp-extensibility@sha256:f118af3ab55f9899

The line at the top of this page pins the label git:20261011.3484b44, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.

Badge

mdr badge

[![mdr](https://markdownregistry.com/badge/art_f4sefc4gngbjvchs.svg)](https://markdownregistry.com/a/art_f4sefc4gngbjvchs)

2 badge image fetches in 30 days. What the badge shows.

Versions

The registry has recorded 6 versions of this file, between May 5, 2026 and Oct 11, 2026, about one every 32 days.

versioncommittedcommitsizeaudit
git:20261011.3484b44 latest2026-10-11 3484b44 12,889 BA view · diff
git:20261005.84ff37a2026-10-05 84ff37a 12,906 BA view · diff
git:20260605.de548652026-06-05 de54865 12,870 BA view · diff
git:20260505.24045672026-05-05 2404567 12,561 BA view · diff
git:20260505.c6e81222026-05-05 c6e8122 12,199 BA view · diff
git:20260505.c9986c62026-05-05 c9986c6 5,020 BA view

Audit of the latest version

A  17 of 17 checks passed. Fixed automatic checks with no AI involved, so the same checks give the same answer every run.
  • pass: Frontmatter block present
  • pass: Frontmatter declares a name
  • pass: Frontmatter declares a description
  • pass: Size between 200 bytes and 200 KB (12889 bytes)
  • pass: No zero-width or bidi control characters
  • pass: No instruction hidden inside an HTML comment
  • pass: No link to an exfiltration or paste host
  • pass: No credential-shaped string
  • pass: No instruction to send local credentials anywhere
  • pass: No text hidden with inline styles
  • pass: No prompt-injection phrasing
  • pass: No curl or wget piped into a shell
  • pass: No recursive delete of root, home or parent
  • pass: No instruction to read or print local credentials
  • pass: No base64 blob over 200 characters
  • pass: No link to a raw IP address
  • pass: No script tag

Source

GitHub

agentfront/frontmcp · 148 stars · license Apache-2.0 · pushed 2026-10-21 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_f4sefc4gngbjvchs
GET https://markdownregistry.com/api/v1/resolve?ref=agentfront/frontmcp/frontmcp-extensibility
GET https://markdownregistry.com/api/v1/blob/f118af3ab55f989953b611ffe1c6f8ed353f4e97ee7e6d5113428010d3cac42d

Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.

Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.

More from agentfront/frontmcp

AGENTS.md AGENTS.md file
agentfront/frontmcp · AGENTS.md
git:20260324.7e28044 · audit A · 148 stars
CLAUDE.md CLAUDE.md file
agentfront/frontmcp · CLAUDE.md
git:20261012.07f7c5f · audit A · 148 stars
docs-skill SKILL.md skill
agentfront/frontmcp · apps/e2e/demo-e2e-skills/src/apps/skills/skills/docs-skill/SKILL.md · A fixture skill with references and examples for E2E testing.
git:20260505.c6e8122 · audit A · 148 stars
CLAUDE.md@libs/plugins CLAUDE.md file
agentfront/frontmcp · libs/plugins/CLAUDE.md
git:20260106.b334103 · audit A · 148 stars
caller-relative-skill SKILL.md skill
agentfront/frontmcp · libs/sdk/src/skill/__tests__/fixtures/caller-relative-skill/SKILL.md · A skill loaded by a path relative to the file that loads it
git:20261011.030ca57 · audit B · 148 stars
create-tool SKILL.md skill
agentfront/frontmcp · libs/skills/catalog/create-tool/SKILL.md · ALWAYS use this skill when the user asks to build, modify, or audit a FrontMCP tool. Covers everything inside…
git:20261011.3484b44 · audit A · 148 stars
frontmcp-auth-ui SKILL.md skill
agentfront/frontmcp · libs/skills/catalog/frontmcp-auth-ui/SKILL.md · Use when customizing, branding, or replacing the built-in FrontMCP OAuth pages (the login, consent, federated-select…
git:20261011.3484b44 · audit B · 148 stars
frontmcp-authorities SKILL.md skill
agentfront/frontmcp · libs/skills/catalog/frontmcp-authorities/SKILL.md · Use when implementing authorization and access control for FrontMCP tools, resources, prompts, or skills, deciding who…
git:20261011.3484b44 · audit A · 148 stars
frontmcp-channels SKILL.md skill
agentfront/frontmcp · libs/skills/catalog/frontmcp-channels/SKILL.md · Use when pushing real-time notifications or events into Claude Code (or another MCP client) sessions, or building…
git:20261007.3a34fab · audit A · 148 stars
frontmcp-config SKILL.md skill
agentfront/frontmcp · libs/skills/catalog/frontmcp-config/SKILL.md · Use when configuring a FrontMCP server through frontmcp.config or the @FrontMcp options. Covers auth modes (public…
git:20261011.3484b44 · audit A · 148 stars
frontmcp-deployment SKILL.md skill
agentfront/frontmcp · libs/skills/catalog/frontmcp-deployment/SKILL.md · Use when deploying, building for production, packaging, or shipping a FrontMCP server. Covers build targets (node, cli…
git:20261012.f800a12 · audit A · 148 stars
frontmcp-development SKILL.md skill
agentfront/frontmcp · libs/skills/catalog/frontmcp-development/SKILL.md · Use when building any FrontMCP server component other than a tool (for tools, use create-tool). Covers @Resource static…
git:20261011.3484b44 · audit A · 148 stars

Every file in agentfront/frontmcp

Browse by kind, by grade A, or by owner.