Claude Code Plugin Ecosystem

Composable plugins
for Claude Code agents

Tools. Homebase. Peers. Superpowers. Four independent packages that give your Claude Code instances intelligence, identity, coordination, and workflow power.

Get Started GitHub
Install all four
/plugin marketplace add decibelsystems/marketplace
/plugin install tools@decibelsystems
/plugin install homebase@decibelsystems
/plugin install peers@decibelsystems
/plugin install superpowers@decibelsystems

The Stack

Four packages. One ecosystem.

Tools

The MCP server, auto-wired

26 facade tools across 20 domains — work tracking, architecture, design, git forensics, coordination, and more. One plugin install, zero manual config.

tools@decibelsystemsFull docs

Domain preview

Sentinel
Issues, epics, ADRs, project health
Architect
System design decisions and policies
Designer
Critiques, token audits, lateral sessions
Oracle
Portfolio summaries, project context
Learnings
Living knowledge documents
12 more
Git, Coordinator, Guardian, and more...
See all 20 domains and 26 tools

Homebase

Branch identity and protocol

Defines what a Decibel branch IS. Conventions, project detection, tool priority, and a discovery contract that lets plugins find each other.

  • —Tool priority rules (Decibel MCP > skills > built-ins)
  • —.decibel/ directory contract
  • —Project capability manifests
  • —Integration hooks for cross-package composability
  • —Verification-before-completion skill
homebase@decibelsystems

Peers

Agent specialization and coordination

Spin up Claude Code instances as specialist reviewers. Designer, architect, debugger — each with structured identity, discovery, and handoff protocols.

  • —Peer identity schema with capability tags
  • —Structured review artifact format
  • —Handoff protocol with offline queuing
  • —4 specialist role templates (designer, reviewer, architect, debugger)
  • —Session-start hook for automatic peer announcement
peers@decibelsystems

Superpowers

Workflow remix with sentinel tracking

Fork of superpowers by Jesse Vincent, refined with sentinel-powered project intelligence. Your planning, debugging, and review become project-aware.

  • —Sentinel-driven planning (issues, ADRs, epics from brainstorming)
  • —Sentinel-driven debugging (bugs tracked through full lifecycle)
  • —Sentinel-driven review (findings escalate to tracked issues)
  • —Project health checks before claiming done
  • —All 14 upstream superpowers skills included
  • —Graceful degradation without MCP tools
superpowers@decibelsystems

Design Principles

Built to stay out of your way

Composable, not coupled

Every package works alone. Install any combination. No dependencies between them.

Protocol over opinion

Homebase defines where things live, not what you believe. Your branch, your rules.

Graceful degradation

Missing a package? Skills fall back cleanly. No silent failures — always visible logging.

Upstream compatible

Superpowers stays mergeable with the original. Your refinements layer on top, never fork away.

Architecture

How the pieces fit

01
Toolswires up the MCP server
02
Homebasegives a branch its shape
03
Peersgives it specialist coordination
04
Superpowersgives it optional workflow juice
05
Marketplacemakes it discoverable

Each layer is independent. Install Tools and you get 26 MCP tools instantly. Add Homebase for conventions and identity. Add Peers and specialists can find each other. Add Superpowers and your workflows become sentinel-tracked. The marketplace is just an index — each package owns its own manifest.

—Install any combination — no required dependencies
—Each package declares its own capabilities
—Homebase discovery contract makes cross-package composability automatic
—Remove any package without breaking the others

Specialist Peers

Claudes that talk to each other

Spin up a Claude as a design reviewer, code reviewer, architect, or debugger. It announces itself, other Claudes find it, and they coordinate through structured protocols.

# Terminal 1 — Designer Peer
$ cd designer-peer && claude
> Setting summary: "Decibel Designer — design system reviewer"
> Checking messages... 1 pending request
# Terminal 2 — Your working session
> list_peers → Found: designer-peer (design-review, token-audit)
> send_message → "Review the card layout in deck-web/src/components/CardGrid.tsx"
# Terminal 1 — Designer responds
> Finding: 8px rhythm broken at line 42 — gap-3 (12px) should be gap-2 (8px)
> Finding: Using hardcoded #18181B instead of token/surface-raised
> Summary: 2 issues, both fixable in place
Designer
design-review, token-audit, spacing
Reviewer
code-review, pr-summary, lint
Architect
adr-review, dependency-check
Debugger
trace-analysis, repro, bisect

Get Started

Install in minutes

Any combination works. Start with one, add the rest when you're ready.

bash
# Add the Decibel marketplace (one time)
/plugin marketplace add decibelsystems/marketplace

# Install what you need — any combination works
/plugin install tools@decibelsystems
/plugin install homebase@decibelsystems
/plugin install peers@decibelsystems
/plugin install superpowers@decibelsystems

Requires Claude Code CLI. All plugins are MIT licensed.