Effect vs oh-my-harness
oh-my-harness is no longer listed on any marketplace we read: these are its last known data, as of 2026‑10‑22.
Effect is an MCP server published by tim-smart. Marketplaces we read that list it: 1 (Docker MCP Catalog). oh-my-harness is a plugin bundle for AI coding tools published by Hoya324. No marketplace we read lists it any more. As of our marketplace pass on 2026-10-22. 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): 12 993 Stars (Docker Hub): 0 Stars (GitHub): 238 Not marked · First seen |
Not listed |
| Community marketplace hoya324/oh-my-harness | Not listed | Removed on 2026-10-22 Version: 0.5.0 Forks (GitHub): 0 Stars (GitHub): 7 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 | oh-my-harnessno longer listed · |
|---|---|---|
| Marketplaces that list it (differs) | 1 | 0 |
| Stars (GitHub) (differs) | 238 | 7 |
| Pulls (Docker Hub) (differs) | 12 993 | No figure on Docker Hub |
| Forks (GitHub) (differs) | 13 | 0 |
| 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 | 11 |
| Parts of the bundle (differs) | Not a bundle | 23 |
| Licence | MIT | MIT |
| Repository (differs) | github.com/tim-smart/effect-mcp | github.com/hoya324/oh-my-harness |
| Changes in the last 7 days (differs) | 0 | 4 |
| First seen (differs) | 2026-10-11 | 2026-10-21 |
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 oh-my-harness
Plugins still listed whose own names, descriptions, tools and skills are closest in meaning to it. Comparable, not endorsed.
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Harness leverages Claude Code's agent team system to decompose complex tasks into coordinated teams of specialized agents. Say "build a harness for this project" and it…
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Multi-agent code harness framework with unified skills for OpenCode, Cursor, Codex, Kimi Code, and ZCode.
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AI Agent Harness Engineering: bootstrap, audit, and evolve a reliable 6-layer agent harness for any project. Generates AGENTS.md, hooks (type-check, .env protection, auto-format…
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Endor Labs workflow agents and setup for Claude Code.
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karimo-harness-engineering-agent-orchestration
Harness engineering framework for Claude Code — plan mode on steroids. Product design-driven agent orchestration with sub-agents and agent teams, tuned for developers and…
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Endor Labs workflow agents and setup for Claude Code.
What each says it does
Effect
Tools and resources for writing Effect code in Typescript.
oh-my-harness
Claude Code and Codex plugin bundling hooks, skills, MCP memory, spec-driven loops, verification, and collaboration; Codex role profiles and durable AGENTS guidance are provisioned explicitly by harness-setup or the local CLI
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-mcpoh-my-harness
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 oh-my-harness 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: oh-my-harness · 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.