Add plugin marketplace structure

[leggetter]

Summary

Adds .claude-plugin/ metadata so this repo is a valid Claude Code plugin marketplace and can be submitted to the community marketplace (Claude.ai submission form). The three existing skills are bundled as a single plugin. No SKILL.md content, scripts, or tooling are modified, this is purely additive metadata.

What was added

• .claude-plugin/marketplace.json — marketplace catalog with one plugin entry, source: "./" (the marketplace root itself).
• .claude-plugin/plugin.json — plugin manifest, version 0.1.0.

Existing skill layout (skills/<name>/SKILL.md at the repo root) already matches the plugin spec, so nothing had to move.

Why

Adding the marketplace manifest lets users discover and install these skills through Claude Code's /plugin marketplace add flow and the various community plugin indexers. It's also the prerequisite for submitting to the official Anthropic marketplace.

Naming

Per Anthropic's marketplace docs, the bare name agent-skills is reserved and rejected by the Claude.ai marketplace sync, alongside claude-code-marketplace, claude-code-plugins, claude-plugins-official, anthropic-marketplace, anthropic-plugins, knowledge-work-plugins, and life-sciences. The GitHub repo name (hookdeck/agent-skills) is unaffected, only the values inside the JSON manifests had to be changed.

Chosen names:

• Marketplace name: hookdeck-agent-skills
• Plugin name: hookdeck

Inside Claude Code the skills are namespaced as:

• hookdeck:hookdeck (the router skill)
• hookdeck:event-gateway
• hookdeck:outpost

Plugin name convention

The plugin name follows the convention used by other single-plugin vendors in the official Anthropic marketplace: plain brand name, no -skills or -plugin suffix. Examples from the official marketplace catalog:

Vendor	Plugin name	Source repo
Vercel	vercel	vercel/vercel-plugin
Supabase	supabase	supabase-community/supabase-plugin
Cloudflare	cloudflare	cloudflare/skills
Sentry	sentry	getsentry/sentry-for-claude
Stripe, Firebase, Linear, Prisma, MongoDB, PlanetScale, Railway	plain brand	various

The slightly tautological hookdeck:hookdeck namespace for the router skill mirrors the established supabase:supabase pattern in supabase/agent-skills, so this is a recognised shape in the ecosystem.

If we ever ship a second plugin from this repo we can switch to prefixed names (the AWS pattern: aws-amplify, aws-core, aws-data-analytics).

Validation

Validated locally with the bundled CLI:

$ claude plugin validate .
Validating marketplace manifest: .../.claude-plugin/marketplace.json
✔ Validation passed

Also smoke-tested loading the plugin with claude --plugin-dir . and confirmed all three skills resolve as hookdeck:hookdeck, hookdeck:event-gateway, and hookdeck:outpost.

Test plan

• claude plugin validate . passes
• claude --plugin-dir . loads the plugin and lists all three skills with the hookdeck: prefix
• After merge, add the marketplace from the GitHub source and install: /plugin marketplace add hookdeck/agent-skills then /plugin install hookdeck@hookdeck-agent-skills
• Submit to the official marketplace via https://claude.ai/settings/plugins/submit

🤖 Generated with Claude Code