mcp-yoshi vs okl — Observed Knowledge Ledger
mcp-yoshi is a plugin bundle for AI coding tools published by aliksir. Marketplaces we read that list it: 1 (Claude Code: claude-plugins-community). okl — Observed Knowledge Ledger is an MCP server published by emeraldleaf. Marketplaces we read that list it: 1 (Official MCP Registry). As of our marketplace pass on 2026-10-16. 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 |  mcp-yoshi |  okl — Observed Knowledge Ledger |
|---|---|---|
| Claude Code: claude-plugins-community | Listed Version: 1.3.0 Forks (GitHub): 0 Stars (GitHub): 1 Not marked · First seen |
Not listed |
| Official MCP Registry | Not listed | Listed Version: 0.8.7 Downloads/month (PyPI): 1 293 Downloads/week (PyPI): 1 005 Forks (GitHub): 1 Stars (GitHub): 1 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 | mcp-yoshi | okl — Observed Knowledge Ledger |
|---|---|---|
| Marketplaces that list it | 1 | 1 |
| Stars (GitHub) | 1 | 1 |
| Forks (GitHub) (differs) | 0 (worse) | 1 (better) |
| Last release (differs) | Not published | 2026-10-12 |
| Where it runs (differs) | Installs as a plugin bundle | On your machine (observed-knowledge-ledger) |
| 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) | 2 | Not published |
| Parts of the bundle (differs) | 3 | Not a bundle |
| Licence (differs) | MIT | Not stated |
| Repository (differs) | github.com/aliksir/mcp-yoshi | github.com/emeraldleaf/okl |
| Changes in the last 7 days (differs) | 0 | 6 |
| 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
mcp-yoshi
Real-time security filter for MCP tool communications. Works as a Claude Code hook to inspect all data sent to and received from MCP servers. Detects prompt injection, API key leakage, tool poisoning, ASCII smuggling, SSRF, Base64-encoded payloads, and Rug Pull attacks. Provides PASS/WARN/BLOCK decisions with per-server configuration, allowlisting, and logging. Zero dependencies, ~60ms latency.
okl — Observed Knowledge Ledger
Lessons your coding agent can trust: briefed before each task, proven by checks, flagged on change.
How to run each
mcp-yoshi As a Claude Code plugin
/plugin marketplace add anthropics/claude-plugins-community
/plugin install mcp-yoshi@claude-communityokl — Observed Knowledge Ledger As a local MCP server: PyPI package
claude mcp add --transport stdio okl -- uvx --with "mcp>=1.2" observed-knowledge-ledger mcpCommands 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: mcp-yoshi · What it can do: okl — Observed Knowledge Ledger · 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 the Official MCP Registry (registry.modelcontextprotocol.io), CC0 1.0. 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.