amphion-agent vs SuperSkill Registry
amphion-agent is no longer listed on any marketplace we read: these are its last known data, as of 2026‑10‑17.
amphion-agent is a plugin bundle for AI coding tools published by activetwist. No marketplace we read lists it any more. SuperSkill Registry is an MCP server published by onlyharness.com. Marketplaces we read that list it: 1 (Official MCP Registry). 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 |  SuperSkill Registry | |
|---|---|---|
| Community marketplace activetwist/amphion-agent-extension | Removed on 2026-10-17 Version: not stated Forks (GitHub): 0 Stars (GitHub): 2 Not marked · First seen |
Not listed |
| Official MCP Registry | Not listed | Listed Version: 0.3.1 Forks (GitHub): 0 Stars (GitHub): 0 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 | amphion-agentno longer listed · | SuperSkill Registry |
|---|---|---|
| Marketplaces that list it (differs) | 0 | 1 |
| Stars (GitHub) (differs) | 2 | 0 |
| Forks (GitHub) | 0 | 0 |
| Last release | Not published | Not published |
| Where it runs (differs) | Installs as a plugin bundle | Remote server (superskill.sh/mcp) |
| Transport (differs) | Not stated | Streamable HTTP |
| Tools it declares | Not published | Not published |
| Environment variables it asks for | Not published | Not published |
| Parts of the bundle (differs) | 10 | Not a bundle |
| Licence | Not stated | Not stated |
| Repository (differs) | github.com/activetwist/amphion-agent-extension | github.com/elvismusli/onlyharness |
| Changes in the last 7 days (differs) | 4 | 0 |
| First seen (differs) | 2026-10-15 | 2026-10-11 |
| Endpoint at the last check (differs) | no remote endpoint we check | Responded 5 days ago |
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 amphion-agent
Plugins still listed whose own names, descriptions, tools and skills are closest in meaning to it. Comparable, not endorsed.
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A workflow skill for long-running Codex, Claude Code, Cursor, and AI agent tasks with contracts, disk-backed state, role separation, verification traces, restarts, subjective…
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Build and run grounded business agents over MCP: agents, knowledge bases, skills, Storylines.
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Open-source AI agent skills for enterprise deployment. Three skills: (1) ServiceNow AI Agent Studio reference with data model, entity mapping, tool types, prompting patterns, and…
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Plugin and skill authoring: create/edit skills, agents, plugins, CLAUDE.md files, search skills, manage dependencies
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Strale agent skills with remote MCP connector for Strale platform integration.
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Assistant setup, instruction hygiene, documentation review, memory capture, skill improvement, harness adaptation, and markdown/prompt maintenance.
What each says it does
amphion-agent
Full AmphionAgent skill suite: initialize MCD workspace, evaluate, contract, execute, closeout, generate docs, manage server, access help, and write session memory
SuperSkill Registry
Find, inspect and install reviewed reusable AI-agent capabilities from superskill.sh.
How to run each
amphion-agent
No data for an automatic command: what its marketplaces declare does not say unambiguously how to connect it.
SuperSkill Registry As a remote MCP server
claude mcp add --transport http registry https://superskill.sh/mcpCommands built only from what the marketplaces declare; the full set for every client is on each card.
Only SuperSkill Registry has a remote endpoint we check. How we check endpoints
Tools each declares
Neither one's marketplaces publish a list of tools, so there is nothing to compare.
Settings each asks for
Neither one's marketplaces publish the settings it asks for.
What it can do: amphion-agent · What it can do: SuperSkill Registry · Compare two other plugins
Data comes from public marketplace files in GitHub repositories of their authors. Data comes from the Official MCP Registry (registry.modelcontextprotocol.io), CC0 1.0. Figures come from our own regular passes over the marketplaces, last read on . We publish no contact details for plugin publishers.