ecosystem-authoritative-sources

Original：🇺🇸 English

Translated

Provides information about how to create, structure, install, and audit Agent Skills, Plugins, Antigravity Workflows, and Sub-agents. Trigger this when specifications, rules, or best practices for the ecosystem are required.

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Sourcerichfrem/agent-plugins-skills

Added on2026-03-08

NPX Install

npx skill4agent add richfrem/agent-plugins-skills ecosystem-authoritative-sources

SKILL.md Content

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Ecosystem Authoritative Sources

Official Open Standard Recognition

Important: This reference library draws heavy inspiration and structural standards directly from the Anthropic Claude Plugins official repositories. Please refer to:

Foundational Specification:

https://github.com/anthropics/claude-plugins-official/tree/main/plugins/plugin-dev

L4 Interaction & Execution Patterns: Derived from
```
https://github.com/anthropics/claude-knowledgework-plugins
```
(specifically the Legal and Bio-Research plugins).

The Library

The following open standards are available for review:

This skill provides comprehensive information and reference guides about the conventions and constraints defining the extensibility ecosystem.

Because of the Progressive Disclosure architecture, you should selectively read the reference files below only when you need detailed information on that specific topic.

To read any of the reference guides, use your file system tools to

cat

view

the relevant file.

Agent Skills: Definition, lifecycle, progressive disclosure, and constraints of
```
.claude/skills/
```
(and equivalents like
```
.agent/skills/
```
and
```
.github/skills/
```
). Custom agents deployed as Skills are stored here as
```
<plugin>-<agent>/SKILL.md
```
.
- reference/skills.md
- reference/skill-execution-flow.mmd
Claude Plugins: Specification for the
```
.claude-plugin
```
architecture, manifest setup, and distribution.
- reference/plugins.md
- reference/plugin-architecture.mmd
Antigravity Workflows & Rules (and Legacy Commands): Specifications for global/workspace Rules, deterministic trajectory Workflows, and the critical distinction between deploying Skills vs. Legacy Commands.
- reference/workflows.md
Sub-Agents: Definition, setup, and orchestration of nested contextual LLM boundaries. Sub-Agents are deployed structurally as pure Skills (mapped to
```
skills/<agent-name>/SKILL.md
```
).
- reference/sub-agents.md
GitHub Copilot Prompts (Models): Documentation on the exact YAML schema, dynamic variables, and exclusion logic (
```
exclude-targets
```
) used by GitHub Copilot chat environments.
- reference/github-prompts.md
GitHub Agentic Workflows: Documentation on the "Continuous AI" autonomous agents responding to CI/CD events.
- reference/github-agentic-workflows.md
Hooks: Lifecycle event integrations (e.g.,
```
pre-commit
```
,
```
on-startup
```
).
- reference/hooks.md
Azure AI Foundry Agents: Documentation on how to map Open Agent-Skills to Azure Foundry Agent Service, including API payloads, constraints (e.g., 128-tool limits), and standard setups.
- reference/azure-foundry-agents.md
Marketplace: Registering registries and interacting with the
```
marketplace.json
```
distribution format.
- reference/marketplace.md

Usage Instruction

Never guess the specifics of

SKILL.md

frontmatter, plugin directory limits, or workflow sizes. Read the exact specifications linked above before constructing new ecosystem extensions.