Superpowers vs Skill Shelf (Rust singleton daemon)
Superpowers is a plugin bundle for AI coding tools published by Jesse Vincent. Marketplaces we read that list it: 1 (Codex: openai-curated (openai/plugins)). Skill Shelf (Rust singleton daemon) is an MCP server published by halflifezyf2680. Marketplaces we read that list it: 1 (Official MCP Registry). As of our marketplace pass on 2026-10-17. This pair was picked by a reader, not by our comparison rule, so search engines are asked not to index the page.
Where each is published
| Marketplace |  Skill Shelf (Rust singleton daemon) | |
|---|---|---|
| Codex: openai-curated (openai/plugins) | Listed Version: 6.3.0 Forks (GitHub): 970 Stars (GitHub): 7 455 Not marked · First seen |
Not listed |
| Official MCP Registry | Not listed | Listed Version: 2.0.5 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 | Superpowers | Skill Shelf (Rust singleton daemon) |
|---|---|---|
| Marketplaces that list it | 1 | 1 |
| Stars (GitHub) (differs) | 7 455 (better) | 4 (worse) |
| Forks (GitHub) (differs) | 970 (better) | 1 (worse) |
| Last release | Not published | Not published |
| Where it runs (differs) | Installs as a plugin bundle | Not stated |
| Transport | Not stated | Not stated |
| Tools it declares | Not published | Not published |
| Environment variables it asks for | Not published | Not published |
| Parts of the bundle (differs) | 14 | Not a bundle |
| Licence (differs) | MIT | Not stated |
| Repository (differs) | github.com/openai/plugins | github.com/halflifezyf2680/skill-shelf |
| Changes in the last 7 days | 0 | 0 |
| First seen | 2026-10-11 | 2026-10-11 |
Lines where the two differ have a tinted background and bold values. Where the data itself says which value is better (more marketplaces, a larger figure of the same marketplace, a fresher release, a verified mark on a marketplace that lists both), the better one is also marked green with ▲ and the worse one red with ▼. Where it runs, the transport, the tools, the settings, hooks, the bundle's parts, the licence and the week's changes are marked only as different: more or fewer is not better in itself.
What each says it does
Superpowers
An agentic skills framework & software development methodology that works: planning, TDD, debugging, and collaboration workflows.
Skill Shelf (Rust singleton daemon)
Progressive group routing for 524 professional skills via Rust daemon stdio shim.
How to run each
Superpowers As a Codex plugin
codex plugin marketplace add openai/pluginsSkill Shelf (Rust singleton daemon)
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
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: Superpowers · What it can do: Skill Shelf (Rust singleton daemon) · Compare two other plugins
Data comes from the public marketplace file https://github.com/openai/plugins/blob/HEAD/.agents/plugins/marketplace.json. 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.