claude-performance vs spc-tools
claude-performance is a plugin bundle for AI coding tools published by adelaidasofia. Marketplaces we read that list it: 1 (Claude Code: claude-plugins-community). spc-tools is a plugin bundle for AI coding tools published by ewolters. Marketplaces we read that list it: 1 (Claude Code: claude-plugins-community). As of our marketplace pass on 2026-10-21. 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 |  claude-performance |  spc-tools |
|---|---|---|
| Claude Code: claude-plugins-community | Listed Version: 1.0.0 Forks (GitHub): 0 Stars (GitHub): 3 Not marked · First seen |
Listed Version: 2d28422 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 | claude-performance | spc-tools |
|---|---|---|
| Marketplaces that list it | 1 | 1 |
| Stars (GitHub) (differs) | 3 (better) | 0 (worse) |
| Forks (GitHub) | 0 | 0 |
| Last release | Not published | Not published |
| Where it runs | Installs as a plugin bundle | Installs as a plugin bundle |
| Transport | Not stated | Not stated |
| Tools it declares | Not published | Not published |
| Environment variables it asks for | Not published | Not published |
| Hooks it runs | 1 | 1 |
| Parts of the bundle (differs) | 2 | 5 |
| Licence (differs) | MIT | Apache-2.0 |
| Repository (differs) | github.com/adelaidasofia/claude-performance | github.com/ewolters/spc-tools |
| Changes in the last 7 days (differs) | 2 | 0 |
| First seen (differs) | 2026-10-11 | 2026-10-12 |
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
claude-performance
Self-improving measurement layer for Claude Code. Reads JSONL session data, computes effectiveness metrics, writes behavioral rules into CLAUDE.md.
spc-tools
SPC Tools gives Claude a calibrated, comprehensive statistical process control toolkit with pure-JavaScript visualization. Covers standard techniques (control charts, Cpk, Gage R&R) as well as Bayesian and distribution-free methods. No dependencies required; computation is pure Python, charts are zero-dependency ChartSpec JSON rendered client-side.
How to run each
claude-performance As a Claude Code plugin
/plugin marketplace add anthropics/claude-plugins-community
/plugin install claude-performance@claude-communityspc-tools As a Claude Code plugin
/plugin marketplace add anthropics/claude-plugins-community
/plugin install spc-tools@claude-communityCommands 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: claude-performance · What it can do: spc-tools · Compare two other plugins
Data comes from the public marketplace file https://github.com/anthropics/claude-plugins-community/blob/HEAD/.claude-plugin/marketplace.json. 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.