Effect vs sdd
Effect is an MCP server published by tim-smart. Marketplaces we read that list it: 1 (Docker MCP Catalog). sdd is a plugin bundle for AI coding tools published by Kyrylo Genkov. Marketplaces we read that list it: 1 (Community GitHub marketplaces). 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 |   Effect | |
|---|---|---|
| Docker MCP Catalog | Listed Version: sha256:a0e077abc890 Forks (GitHub): 13 Pulls (Docker Hub): 12 984 Stars (Docker Hub): 0 Stars (GitHub): 238 Not marked · First seen |
Not listed |
| Community marketplace genkovich/sdd | Not listed | Listed Version: 2.4.1 Forks (GitHub): 67 Stars (GitHub): 184 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 | Effect | sdd |
|---|---|---|
| Marketplaces that list it | 1 | 1 |
| Stars (GitHub) (differs) | 238 (better) | 184 (worse) |
| Pulls (Docker Hub) (differs) | 12 984 | No figure on Docker Hub |
| Forks (GitHub) (differs) | 13 (worse) | 67 (better) |
| Last release | Not published | Not published |
| Where it runs (differs) | On your machine (mcp/effect-mcp) | Installs as a plugin bundle |
| Transport (differs) | stdio | Not stated |
| Tools it declares (differs) | 2 | Not published |
| Environment variables it asks for | Not published | Not published |
| Parts of the bundle (differs) | Not a bundle | 33 |
| Licence | MIT | MIT |
| Repository (differs) | github.com/tim-smart/effect-mcp | github.com/genkovich/sdd |
| Changes in the last 7 days (differs) | 0 | 2 |
| First seen (differs) | 2026-10-11 | 2026-10-19 |
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
Effect
Tools and resources for writing Effect code in Typescript.
sdd
Spec-Driven Development pipeline: 23 atomic Socratic skills (survey/scaffold → spec → ux-flows → design → data-model → api → screens → tasks → tests → implement → review → ship) + a living decomposition roadmap (steps + dependency graph + parallel-safe execution waves) above the per-feature flow + 10 subagents, plus a TDD implementation engine with agent-team and dynamic-workflow modes. The Q&A skills are depth-tunable (easy/medium/hard); the ideation analyses (researcher/strategist/analyst/devil's-advocate) run as named subagents gated by that dial; diagrams are confirmed in prose; and every acceptance criterion is covered end-to-end. Surface-aware: declare target surfaces at design (backend/web/mobile/desktop/CLI/worker/library, as C4 containers); downstream gates the `ui` task layer, UI-driven flows, and frontend test tiers. UI features get a design pipeline (auto-skipped for backend-only work): design-system (the committed canon — Figma MCP / Pencil MCP / code-markdown; on pencil it also bootstraps and se
How to run each
Effect As a local MCP server: Docker image
claude mcp add --transport stdio effect-mcp -- docker run -i --rm mcp/effect-mcpsdd As a Claude Code plugin
/plugin marketplace add genkovich/sdd
/plugin install sdd@sddCommands built only from what the marketplaces declare; the full set for every client is on each card.
Tools each declares
The marketplaces of sdd publish no list of tools, so we do not compare tools.
Settings each asks for
Neither one's marketplaces publish the settings it asks for.
What it can do: Effect · What it can do: sdd · Compare two other plugins
Data comes from the Docker MCP Catalog (desktop.docker.com/mcp/catalog) and Docker Hub. 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.