pstack vs karellen-rr-mcp
pstack is a plugin bundle for AI coding tools published by Lauren Tan. Marketplaces we read that list it: 1 (Cursor: cursor/plugins). karellen-rr-mcp is a plugin bundle for AI coding tools published by karellen. Marketplaces we read that list it: 1 (Claude Code: claude-plugins-community). As of our marketplace pass on 2026-10-13. 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 | ||
|---|---|---|
| Cursor: cursor/plugins | Listed Version: 0.15.21 Forks (GitHub): 1 066 Stars (GitHub): 11 026 Not marked · First seen |
Not listed |
| Claude Code: claude-plugins-community | Not listed | Listed Version: 0.2.4 Forks (GitHub): 0 Stars (GitHub): 3 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 | pstack | karellen-rr-mcp |
|---|---|---|
| Marketplaces that list it | 1 | 1 |
| Stars (GitHub) (differs) | 11 026 (better) | 3 (worse) |
| Forks (GitHub) (differs) | 1 066 (better) | 0 (worse) |
| Last release (differs) | 2026-10-13 | 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 (differs) | Not published | 3 |
| Parts of the bundle (differs) | 54 | 9 |
| Licence (differs) | MIT | Apache-2.0 |
| Repository (differs) | github.com/cursor/plugins | github.com/karellen/karellen-rr-mcp |
| Changes in the last 7 days (differs) | 1 | 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
pstack
if you want to go fast, go deep first. pstack helps you write less, but higher quality code. rigorous agent workflows you can parallelize with confidence.
karellen-rr-mcp
Claude Code plugin for rr reverse debugging via MCP. Automatically configures the karellen-rr-mcp MCP server and includes a crash detection hook that suggests rr when a command exits with a signal (SIGSEGV, SIGABRT, etc.) or sanitizer output is detected, a debugging skill with the full record-replay-analyze workflow, and an rr-investigator agent for autonomous crash investigation through reverse execution. Requires Linux x86-64 with rr, gdb, and pip install karellen-rr-mcp.
How to run each
pstack
No data for an automatic command: what its marketplaces declare does not say unambiguously how to connect it.
karellen-rr-mcp As a Claude Code plugin
/plugin marketplace add anthropics/claude-plugins-community
/plugin install karellen-rr-mcp@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: pstack · What it can do: karellen-rr-mcp · Compare two other plugins
Data comes from the public marketplace file https://github.com/cursor/plugins/blob/HEAD/.cursor-plugin/marketplace.json. Data comes from the public marketplace file https://github.com/anthropics/claude-plugins-community/blob/HEAD/.claude-plugin/marketplace.json. Figures come from our own regular passes over the marketplaces, last read on . We publish no contact details for plugin publishers.