Effect vs core-skills
core-skills is no longer listed on any marketplace we read: these are its last known data, as of 2026‑10‑19.
Effect is an MCP server published by tim-smart. Marketplaces we read that list it: 1 (Docker MCP Catalog). core-skills is a plugin bundle for AI coding tools published by Dean Dumitru. No marketplace we read lists it any more. As of our marketplace pass on 2026-10-19. A plugin in this pair is no longer listed on any marketplace we read, so search engines are asked not to index the page.
Where each is published
| Marketplace |   Effect | |
|---|---|---|
| Docker MCP Catalog | Listed Version: sha256:a0e077abc890 Forks (GitHub): 13 Pulls (Docker Hub): 12 954 Stars (Docker Hub): 0 Stars (GitHub): 238 Not marked · First seen |
Not listed |
| Community marketplace deandum/claude-resources | Not listed | Removed on 2026-10-19 Version: 3.0.0 Forks (GitHub): 1 Stars (GitHub): 4 Not marked · First seen |
Each figure is the marketplace's own and is never added up across marketplaces. A marketplace that publishes no figure shows none: no number is not zero.
The facts side by side
| Fact | Effect | core-skillsno longer listed · |
|---|---|---|
| Marketplaces that list it (differs) | 1 | 0 |
| Stars (GitHub) (differs) | 238 | 4 |
| Pulls (Docker Hub) (differs) | 12 954 | No figure on Docker Hub |
| Forks (GitHub) (differs) | 13 | 1 |
| Last release | Not published | Not published |
| Where it runs (differs) | On your machine (mcp/effect-mcp) | Installs as a plugin bundle |
| Transport (differs) | stdio | Not stated |
| Tools it declares (differs) | 2 | Not published |
| Environment variables it asks for | Not published | Not published |
| Hooks it runs (differs) | Not published | 2 |
| Parts of the bundle (differs) | Not a bundle | 43 |
| Licence | MIT | MIT |
| Repository (differs) | github.com/tim-smart/effect-mcp | github.com/deandum/claude-resources |
| Changes in the last 7 days (differs) | 0 | 4 |
| First seen (differs) | 2026-10-11 | 2026-10-15 |
Lines where the two differ have a tinted background and bold values. No value is marked better or worse: a plugin no marketplace lists any more is shown with its last known data, which we do not rank against current figures.
What to use instead of core-skills
Plugins still listed whose own names, descriptions, tools and skills are closest in meaning to it. Comparable, not endorsed.
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Production-grade engineering skills covering every phase of software development: spec, plan, build, verify, review, and ship.
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Production-grade engineering skills covering every phase of software development: spec, plan, build, verify, review, and ship.
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37 advanced engineering skills: agent designer, agent workflow designer, RAG architect, database designer + schema designer + SQL assistant, migration architect, observability…
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Public Builder skills for docs-first discipline, autonomous execution, cross-agent review, local-first Rewind memory, efficient agent workflows, clear status recaps, Agent-Native…
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60 Agent Skills spanning the agent lifecycle, building, diagnosis, SRE, security, review, QA, data, delivery, docs, and research.
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Complete CTO & Staff Engineer toolkit: 24 skills covering code review, architecture, DevOps, security, testing, and engineering management
What each says it does
Effect
Tools and resources for writing Effect code in Typescript.
core-skills
Language-agnostic process skills covering spec-driven orchestration, error handling, testing strategy, code review, API design, concurrency, observability, Docker, project structure, and code style
How to run each
Effect As a local MCP server: Docker image
claude mcp add --transport stdio effect-mcp -- docker run -i --rm mcp/effect-mcpcore-skills
No data for an automatic command: what its marketplaces declare does not say unambiguously how to connect it.
Commands built only from what the marketplaces declare; the full set for every client is on each card.
Tools each declares
The marketplaces of core-skills publish no list of tools, so we do not compare tools.
Settings each asks for
Neither one's marketplaces publish the settings it asks for.
What it can do: Effect · What it can do: core-skills · Compare two other plugins
Data comes from the Docker MCP Catalog (desktop.docker.com/mcp/catalog) and Docker Hub. Data comes from public marketplace files in GitHub repositories of their authors. Figures come from our own regular passes over the marketplaces, last read on . We publish no contact details for plugin publishers.