null-safety vs io.github.sgroy10/speclock
null-safety is no longer listed on any marketplace we read: these are its last known data, as of 2026‑10‑18.
null-safety is a plugin bundle for AI coding tools published by barnburner121. No marketplace we read lists it any more. io.github.sgroy10/speclock is an MCP server published by sgroy10. Marketplaces we read that list it: 3 (Official MCP Registry, npm registry (MCP servers), Community GitHub marketplaces). As of our marketplace pass on 2026-10-27. 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 |  io.github.sgroy10/speclock | |
|---|---|---|
| Community marketplace barnburner121/claude-plugin-marketplace | Removed on 2026-10-18 Version: 1.0.0 Forks (GitHub): 0 Stars (GitHub): 3 Not marked · First seen |
Not listed |
| Official MCP Registry | Not listed | Listed Version: 5.5.3 Downloads/month (npm): 833 Downloads/week (npm): 151 Forks (GitHub): 6 Stars (GitHub): 25 Not marked · First seen |
| npm registry (MCP servers) | Not listed | Listed Version: 5.8.0 Downloads/month (npm): 833 Downloads/week (npm): 151 Forks (GitHub): 6 Stars (GitHub): 25 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 | null-safetyno longer listed · | io.github.sgroy10/speclock |
|---|---|---|
| Marketplaces that list it (differs) | 0 | 3 |
| Stars (GitHub) (differs) | 3 | 25 |
| Forks (GitHub) (differs) | 0 | 6 |
| Last release | Not published | Not published |
| Where it runs (differs) | On your machine (@barnburner121/plugin-hub-mcp) | On your machine (speclock) |
| Transport (differs) | Not stated | stdio |
| Tools it declares | Not published | Not published |
| Environment variables it asks for | Not published | Not published |
| Hooks it runs (differs) | Not published | 1 |
| Parts of the bundle (differs) | 2 | 3 |
| Licence | MIT | MIT |
| Repository (differs) | github.com/barnburner121/claude-plugin-marketplace | github.com/sgroy10/speclock |
| Changes in the last 7 days | 0 | 0 |
| First seen (differs) | 2026-10-14 | 2026-10-11 |
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 null-safety
Plugins still listed whose own names, descriptions, tools and skills are closest in meaning to it. Comparable, not endorsed.
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Analyzes and fixes bugs in your codebase
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Prevent, catch, and verify architectural violations while Claude Code works.
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Debugging specialist for errors, test failures, and unexpected behavior. Use proactively when encountering any issues.
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Systematically debug issues with step-by-step troubleshooting approaches.
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Pre-PR review with severity grading and tiered model routing. Detects TOCTOU races, accessibility gaps, hardcoded secrets, silent-blinding sensors (swallowed errors, negative…
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SOLID principles enforcement with automatic project detection and validation for all languages
What each says it does
null-safety
Find null/undefined issues and add safety checks
io.github.sgroy10/speclock
AI Constraint Engine — enforces CLAUDE.md and .cursorrules as laws. 51 MCP tools.
How to run each
null-safety
No data for an automatic command: what its marketplaces declare does not say unambiguously how to connect it.
io.github.sgroy10/speclock As a local MCP server: npm package
claude mcp add --transport stdio speclock -- npx -y speclockCommands 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: null-safety · What it can do: io.github.sgroy10/speclock · 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. Package data comes from the public npm registry (registry.npmjs.org). Figures come from our own regular passes over the marketplaces, last read on . We publish no contact details for plugin publishers.