diff --git a/.github/plugin/marketplace.json b/.github/plugin/marketplace.json
new file mode 100644
index 0000000..1ee09c1
--- /dev/null
+++ b/.github/plugin/marketplace.json
@@ -0,0 +1,19 @@
+{
+  "name": "paper",
+  "owner": {
+    "name": "Paper",
+    "email": "team@paper.design"
+  },
+  "metadata": {
+    "description": "Paper connects your teams, agents, code, and data on a single design space built on web standards.",
+    "version": "0.1.0"
+  },
+  "plugins": [
+    {
+      "name": "paper-desktop",
+      "source": "./plugins/paper-desktop",
+      "description": "Connect to Paper Desktop using its MCP server.",
+      "version": "0.2.0"
+    }
+  ]
+}
diff --git a/README.md b/README.md
index e2e0a9d..2eb6f05 100644
--- a/README.md
+++ b/README.md
@@ -43,3 +43,51 @@ codex plugin install paper-desktop@paper
 You can also browse and install plugins interactively by running `/plugins` inside Codex CLI after adding the marketplace.
 
 - [Read more about installing Codex plugins](https://developers.openai.com/codex/plugins)
+
+## Copilot CLI
+
+**Add the custom marketplace**
+
+```sh
+copilot plugin marketplace add paper-design/agent-plugins
+```
+
+**Install the plugin**
+
+```sh
+copilot plugin install paper-desktop@paper
+```
+
+Confirm with `copilot mcp list`. Plugins installed this way also appear in VS Code under **Agent Plugins - Installed**.
+
+## VS Code
+
+1. Enable agent plugins: set `chat.plugins.enabled` to `true`.
+2. Add the marketplace in settings:
+
+```json
+"chat.plugins.marketplaces": [
+  "paper-design/agent-plugins"
+]
+```
+
+3. Install **paper-desktop** from the Agent Plugins view (or install via Copilot CLI as above).
+
+### Manual MCP (optional)
+
+If you prefer not to use plugins, add this to your Copilot / VS Code MCP config:
+
+```json
+{
+  "servers": {
+    "paper": {
+      "type": "stdio",
+      "command": "${userHome}/.paper/bin/paper",
+      "args": ["mcp"]
+    }
+  }
+}
+```
+
+- [About Copilot plugins](https://docs.github.com/en/copilot/concepts/agents/about-plugins)
+- [Agent plugins in VS Code](https://code.visualstudio.com/docs/agent-customization/agent-plugins)
diff --git a/package.json b/package.json
index 4448776..b0b1510 100644
--- a/package.json
+++ b/package.json
@@ -3,7 +3,8 @@
   "type": "module",
   "private": true,
   "scripts": {
-    "build": "bun ./scripts/validate-cursor-schema.mjs && bun ./scripts/validate-cursor-structure.mjs && bun ./scripts/validate-codex.mjs"
+    "build": "bun ./scripts/validate-cursor-schema.mjs && bun ./scripts/validate-cursor-structure.mjs && bun ./scripts/validate-codex.mjs && bun ./scripts/validate-copilot.mjs",
+    "test": "bun run build"
   },
   "devDependencies": {
     "@types/bun": "latest",
diff --git a/plugins/paper-desktop/.claude-plugin/plugin.json b/plugins/paper-desktop/.claude-plugin/plugin.json
index bdb45a5..dd80a5d 100644
--- a/plugins/paper-desktop/.claude-plugin/plugin.json
+++ b/plugins/paper-desktop/.claude-plugin/plugin.json
@@ -1,6 +1,6 @@
 {
   "name": "paper-desktop",
-  "version": "0.1.0",
+  "version": "0.2.0",
   "description": "Design on a canvas that Claude can read and write to — built on web standards.",
   "author": {
     "name": "Paper",
@@ -21,6 +21,5 @@
     "mcp",
     "design-system"
   ],
-  "skills": "./skills",
   "mcpServers": "./mcp.json"
 }
diff --git a/plugins/paper-desktop/.codex-plugin/plugin.json b/plugins/paper-desktop/.codex-plugin/plugin.json
index 18d14da..9234f81 100644
--- a/plugins/paper-desktop/.codex-plugin/plugin.json
+++ b/plugins/paper-desktop/.codex-plugin/plugin.json
@@ -1,6 +1,6 @@
 {
   "name": "paper-desktop",
-  "version": "0.1.0",
+  "version": "0.2.0",
   "description": "Design on a canvas that Codex can read and write to — built on web standards.",
   "author": {
     "name": "Paper",
@@ -23,7 +23,6 @@
     "mcp",
     "design-system"
   ],
-  "skills": "./skills/",
   "mcpServers": "./mcp.json",
   "interface": {
     "displayName": "Paper Desktop",
diff --git a/plugins/paper-desktop/.cursor-plugin/plugin.json b/plugins/paper-desktop/.cursor-plugin/plugin.json
index f36e0ef..2833fb3 100644
--- a/plugins/paper-desktop/.cursor-plugin/plugin.json
+++ b/plugins/paper-desktop/.cursor-plugin/plugin.json
@@ -1,7 +1,7 @@
 {
   "name": "paper-desktop",
   "displayName": "Paper",
-  "version": "0.1.0",
+  "version": "0.2.0",
   "description": "Design on a canvas that Cursor can read and write to — built on web standards.",
   "author": {
     "name": "Paper",
diff --git a/plugins/paper-desktop/README.md b/plugins/paper-desktop/README.md
index c285d22..a718093 100644
--- a/plugins/paper-desktop/README.md
+++ b/plugins/paper-desktop/README.md
@@ -14,7 +14,7 @@ Paper connects your designs, agents, code, and data on a single canvas built on
 
 ## Prerequisites
 
-Paper Desktop must be running with a file open for the MCP server to be available. Download it at [paper.design/downloads](https://paper.design/downloads).
+Install [Paper Desktop](https://paper.design/downloads) and open it once.
 
 ## Examples
 
diff --git a/plugins/paper-desktop/mcp.json b/plugins/paper-desktop/mcp.json
index 034d089..3afdae1 100644
--- a/plugins/paper-desktop/mcp.json
+++ b/plugins/paper-desktop/mcp.json
@@ -1,8 +1,10 @@
 {
+  "$schema": "https://agent-plugins.org/schemas/1.0.0/mcp.schema.json",
   "mcpServers": {
     "paper": {
-      "type": "http",
-      "url": "http://127.0.0.1:29979/mcp"
+      "type": "stdio",
+      "command": "${userHome}/.paper/bin/paper",
+      "args": ["mcp"]
     }
   }
 }
diff --git a/plugins/paper-desktop/plugin.json b/plugins/paper-desktop/plugin.json
new file mode 100644
index 0000000..b56675f
--- /dev/null
+++ b/plugins/paper-desktop/plugin.json
@@ -0,0 +1,27 @@
+{
+  "$schema": "https://agent-plugins.org/schemas/1.0.0/plugin.schema.json",
+  "name": "paper-desktop",
+  "version": "0.2.0",
+  "description": "Design on a canvas that Copilot can read and write to — built on web standards.",
+  "author": {
+    "name": "Paper",
+    "email": "team@paper.design",
+    "url": "https://paper.design"
+  },
+  "homepage": "https://paper.design",
+  "repository": "https://github.com/paper-design/agent-plugins",
+  "license": "MIT",
+  "keywords": [
+    "paper",
+    "design",
+    "ui",
+    "canvas",
+    "html",
+    "css",
+    "design-to-code",
+    "code-to-design",
+    "mcp",
+    "design-system"
+  ],
+  "mcpServers": "./mcp.json"
+}
diff --git a/plugins/paper-desktop/rules/ensure-paper-started.md b/plugins/paper-desktop/rules/ensure-paper-started.md
deleted file mode 100644
index 71eff56..0000000
--- a/plugins/paper-desktop/rules/ensure-paper-started.md
+++ /dev/null
@@ -1,5 +0,0 @@
----
-description: Guidelines for using the Paper MCP server
----
-
-Before using any Paper MCP tools, ensure the Paper Desktop app is running on the user's machine. If a connection to the Paper MCP server fails, remind the user to open Paper Desktop first.
diff --git a/plugins/paper-desktop/skills/code-to-design/SKILL.md b/plugins/paper-desktop/skills/code-to-design/SKILL.md
deleted file mode 100644
index 2ba0ace..0000000
--- a/plugins/paper-desktop/skills/code-to-design/SKILL.md
+++ /dev/null
@@ -1,8 +0,0 @@
----
-name: code-to-design
-description: Generate a Paper design from the project's codebase — using its tokens, styles, and components as context.
----
-
-Before starting, ensure Paper Desktop is running with a file open. If a connection to the Paper MCP server fails, remind the user to open Paper Desktop first.
-
-Read the project's stylesheets, design tokens, or theme files to understand the existing design language. Then create a new artboard in Paper and build the requested UI using the codebase's actual colors, typography, spacing, and component patterns — not generic defaults.
diff --git a/plugins/paper-desktop/skills/design-to-code/SKILL.md b/plugins/paper-desktop/skills/design-to-code/SKILL.md
deleted file mode 100644
index d3b68a3..0000000
--- a/plugins/paper-desktop/skills/design-to-code/SKILL.md
+++ /dev/null
@@ -1,8 +0,0 @@
----
-name: design-to-code
-description: Turn a Paper design into production code using the project's existing conventions.
----
-
-Before starting, ensure Paper Desktop is running with a file open. If a connection to the Paper MCP server fails, remind the user to open Paper Desktop first.
-
-Read the selected frame or artboard from Paper — including structure, styles, text content, and computed layout. Then generate production-ready components in the project's framework and coding style. Match the design's layout, spacing, typography, and colors using the codebase's existing conventions (e.g. Tailwind classes, CSS modules, design tokens, styled-components).
diff --git a/schemas/agent-plugins/mcp.schema.json b/schemas/agent-plugins/mcp.schema.json
new file mode 100644
index 0000000..a9139a4
--- /dev/null
+++ b/schemas/agent-plugins/mcp.schema.json
@@ -0,0 +1,120 @@
+{
+  "$schema": "https://json-schema.org/draft/2020-12/schema",
+  "$id": "https://agent-plugins.org/schemas/1.0.0/mcp.schema.json",
+  "title": "Agent Plugins MCP Configuration",
+  "description": "Machine-readable schema for mcp.json in Agent Plugins 1.0.0. The Agent Plugins specification defines additional semantic and operational requirements.",
+  "type": "object",
+  "properties": {
+    "$schema": {
+      "const": "https://agent-plugins.org/schemas/1.0.0/mcp.schema.json",
+      "description": "Canonical identifier of the MCP configuration schema for the Agent Plugins version targeted by this document."
+    },
+    "mcpServers": {
+      "type": "object",
+      "additionalProperties": {
+        "$ref": "#/$defs/server"
+      }
+    }
+  },
+  "required": ["$schema", "mcpServers"],
+  "additionalProperties": false,
+  "$defs": {
+    "server": {
+      "title": "MCP server",
+      "oneOf": [
+        {
+          "$ref": "#/$defs/stdioServer"
+        },
+        {
+          "$ref": "#/$defs/streamableHttpServer"
+        },
+        {
+          "$ref": "#/$defs/sseServer"
+        }
+      ]
+    },
+    "stdioServer": {
+      "title": "stdio MCP server",
+      "type": "object",
+      "properties": {
+        "type": {
+          "const": "stdio"
+        },
+        "command": {
+          "type": "string",
+          "minLength": 1,
+          "description": "Executable token. Resolution rules are defined by the Agent Plugins specification."
+        },
+        "args": {
+          "type": "array",
+          "items": {
+            "type": "string"
+          }
+        },
+        "env": {
+          "type": "object",
+          "propertyNames": {
+            "not": {
+              "enum": ["PLUGIN_ROOT", "PLUGIN_DATA"]
+            }
+          },
+          "additionalProperties": {
+            "type": "string"
+          }
+        },
+        "cwd": {
+          "type": "string",
+          "pattern": "^(?:\\./|\\$\\{PLUGIN_ROOT\\}(?:/|$)|\\$\\{PLUGIN_DATA\\}(?:/|$))",
+          "description": "Plugin-relative, PLUGIN_ROOT-rooted, or PLUGIN_DATA-rooted working directory. Filesystem containment is validated separately."
+        }
+      },
+      "required": ["type", "command"],
+      "additionalProperties": false
+    },
+    "streamableHttpServer": {
+      "title": "Streamable HTTP MCP server",
+      "type": "object",
+      "properties": {
+        "type": {
+          "const": "streamable-http"
+        },
+        "url": {
+          "type": "string",
+          "minLength": 1,
+          "description": "MCP endpoint URL. URL semantics are defined by the Agent Plugins specification."
+        },
+        "headers": {
+          "$ref": "#/$defs/headers"
+        }
+      },
+      "required": ["type", "url"],
+      "additionalProperties": false
+    },
+    "sseServer": {
+      "title": "Legacy HTTP+SSE MCP server",
+      "type": "object",
+      "properties": {
+        "type": {
+          "const": "sse"
+        },
+        "url": {
+          "type": "string",
+          "minLength": 1,
+          "description": "MCP endpoint URL. URL semantics are defined by the Agent Plugins specification."
+        },
+        "headers": {
+          "$ref": "#/$defs/headers"
+        }
+      },
+      "required": ["type", "url"],
+      "additionalProperties": false
+    },
+    "headers": {
+      "title": "HTTP headers",
+      "type": "object",
+      "additionalProperties": {
+        "type": "string"
+      }
+    }
+  }
+}
diff --git a/schemas/agent-plugins/plugin.schema.json b/schemas/agent-plugins/plugin.schema.json
new file mode 100644
index 0000000..8fed0e1
--- /dev/null
+++ b/schemas/agent-plugins/plugin.schema.json
@@ -0,0 +1,65 @@
+{
+  "$schema": "https://json-schema.org/draft/2020-12/schema",
+  "$id": "https://agent-plugins.org/schemas/1.0.0/plugin.schema.json",
+  "title": "Agent Plugins Manifest",
+  "description": "Machine-readable schema for plugin.json in Agent Plugins 1.0.0. The Agent Plugins specification defines additional semantic and operational requirements.",
+  "type": "object",
+  "properties": {
+    "$schema": {
+      "const": "https://agent-plugins.org/schemas/1.0.0/plugin.schema.json",
+      "description": "Canonical identifier of the plugin manifest schema for the Agent Plugins version targeted by this document."
+    },
+    "name": {
+      "type": "string",
+      "minLength": 1,
+      "maxLength": 64,
+      "pattern": "^(?!.*(?:--|\\.\\.))[a-z0-9](?:[a-z0-9.-]*[a-z0-9])?$",
+      "description": "Human-readable plugin name."
+    },
+    "version": {
+      "type": "string"
+    },
+    "description": {
+      "type": "string"
+    },
+    "author": {
+      "type": "object",
+      "properties": {
+        "name": {
+          "type": "string"
+        },
+        "email": {
+          "type": "string"
+        },
+        "url": {
+          "type": "string"
+        }
+      },
+      "additionalProperties": false
+    },
+    "homepage": {
+      "type": "string"
+    },
+    "repository": {
+      "type": "string"
+    },
+    "license": {
+      "type": "string"
+    },
+    "keywords": {
+      "type": "array",
+      "items": {
+        "type": "string"
+      }
+    },
+    "extensions": {
+      "type": "object",
+      "description": "Client-specific manifest data keyed by reverse-domain extension namespace. Agent Plugins assigns no semantics to namespace object contents.",
+      "additionalProperties": {
+        "type": "object"
+      }
+    }
+  },
+  "required": ["$schema", "name"],
+  "additionalProperties": false
+}
diff --git a/scripts/validate-copilot.mjs b/scripts/validate-copilot.mjs
new file mode 100644
index 0000000..c96b597
--- /dev/null
+++ b/scripts/validate-copilot.mjs
@@ -0,0 +1,186 @@
+#!/usr/bin/env node
+
+/**
+ * Copilot plugin validator.
+ * - marketplace.json: GitHub Copilot marketplace layout
+ * - plugin.json: Open Plugin Spec fields (+ Copilot `mcpServers` path)
+ * - mcp.json: Open Plugin Spec MCP schema
+ */
+
+import { readFileSync, existsSync, statSync } from "fs";
+import { resolve, dirname, relative } from "path";
+import { fileURLToPath } from "url";
+import Ajv2020 from "ajv/dist/2020.js";
+import addFormats from "ajv-formats";
+
+const __dirname = dirname(fileURLToPath(import.meta.url));
+const root = resolve(__dirname, "..");
+
+function loadJSON(path) {
+  return JSON.parse(readFileSync(path, "utf-8"));
+}
+
+function loadJSONSafe(path, label, fail) {
+  if (!existsSync(path)) {
+    fail(`${label}: file not found at ${relative(root, path)}`);
+    return null;
+  }
+  try {
+    return loadJSON(path);
+  } catch (err) {
+    fail(`${label}: invalid JSON — ${err.message}`);
+    return null;
+  }
+}
+
+const pluginSchema = loadJSON(
+  resolve(root, "schemas/agent-plugins/plugin.schema.json")
+);
+const mcpSchema = loadJSON(resolve(root, "schemas/agent-plugins/mcp.schema.json"));
+
+const ajv = new Ajv2020({ allErrors: true, strict: false });
+addFormats(ajv);
+
+const validatePlugin = ajv.compile(pluginSchema);
+const validateMcp = ajv.compile(mcpSchema);
+
+let errors = 0;
+
+function fail(message) {
+  console.error(`ERROR: ${message}`);
+  errors++;
+}
+
+function reportSchemaErrors(label, validate) {
+  fail(`${label}: schema validation failed:`);
+  for (const err of validate.errors ?? []) {
+    const detail =
+      err.keyword === "additionalProperties"
+        ? `${err.message}: "${err.params.additionalProperty}"`
+        : err.message;
+    console.error(`  ${err.instancePath || "/"}: ${detail}`);
+  }
+}
+
+function isValidRelativePath(path) {
+  if (typeof path !== "string" || path.length === 0) return false;
+  const stripped = path.startsWith("./") ? path.slice(2) : null;
+  if (stripped === null || stripped.length === 0) return false;
+  const segments = stripped.replace(/\/+$/, "").split("/");
+  return segments.every((s) => s.length > 0 && s !== ".." && s !== ".");
+}
+
+// 1. Marketplace (GitHub Copilot layout; structural checks)
+const marketplacePath = resolve(root, ".github/plugin/marketplace.json");
+const marketplace = loadJSONSafe(marketplacePath, "Marketplace", fail);
+
+if (!marketplace) {
+  process.exit(1);
+}
+
+if (typeof marketplace.name !== "string" || marketplace.name.length === 0) {
+  fail("Marketplace: missing or empty `name`");
+}
+
+if (!Array.isArray(marketplace.plugins) || marketplace.plugins.length === 0) {
+  fail("Marketplace: `plugins` must be a non-empty array");
+}
+
+for (const [index, entry] of (marketplace.plugins ?? []).entries()) {
+  const label = `Marketplace plugins[${index}]`;
+
+  if (typeof entry?.name !== "string" || entry.name.length === 0) {
+    fail(`${label}: missing or empty \`name\``);
+    continue;
+  }
+
+  const pluginLabel = `Marketplace plugin "${entry.name}"`;
+
+  if (!isValidRelativePath(entry.source)) {
+    fail(
+      `${pluginLabel}: \`source\` must be a relative path starting with "./" — got "${entry.source}"`
+    );
+    continue;
+  }
+
+  const pluginDir = resolve(root, entry.source.slice(2));
+  if (!existsSync(pluginDir) || !statSync(pluginDir).isDirectory()) {
+    fail(`${pluginLabel}: source directory does not exist — ${entry.source}`);
+    continue;
+  }
+
+  // 2. plugin.json — OPS core fields; Copilot allows mcpServers on top
+  const pluginJsonPath = resolve(pluginDir, "plugin.json");
+  const pluginJson = loadJSONSafe(
+    pluginJsonPath,
+    `${pluginLabel} plugin.json`,
+    fail
+  );
+  if (!pluginJson) continue;
+
+  const { mcpServers, ...opsPluginJson } = pluginJson;
+  if (!validatePlugin(opsPluginJson)) {
+    reportSchemaErrors(
+      `${pluginLabel} (${relative(root, pluginJsonPath)})`,
+      validatePlugin
+    );
+  }
+
+  if (pluginJson.name && pluginJson.name !== entry.name) {
+    fail(
+      `${pluginLabel}: marketplace name does not match plugin.json name "${pluginJson.name}"`
+    );
+  }
+
+  // 3. MCP via Copilot mcpServers path (or inline object)
+  if (mcpServers === undefined) {
+    fail(
+      `${pluginLabel}: missing \`mcpServers\` (path to mcp.json or inline servers)`
+    );
+    continue;
+  }
+
+  let mcpJson = null;
+  let mcpLabel = `${pluginLabel} mcpServers`;
+
+  if (typeof mcpServers === "string") {
+    if (!isValidRelativePath(mcpServers)) {
+      fail(
+        `${pluginLabel}: \`mcpServers\` path must start with "./" — got "${mcpServers}"`
+      );
+      continue;
+    }
+    const mcpPath = resolve(pluginDir, mcpServers.slice(2));
+    mcpLabel = `${pluginLabel} (${relative(root, mcpPath)})`;
+    mcpJson = loadJSONSafe(mcpPath, mcpLabel, fail);
+  } else if (mcpServers && typeof mcpServers === "object") {
+    mcpJson = { mcpServers };
+    // Inline Copilot shape lacks OPS $schema; wrap only the servers object
+    // Validate by synthesizing a minimal OPS document when possible.
+    if (!("$schema" in mcpServers) && !("mcpServers" in mcpServers)) {
+      mcpJson = {
+        $schema: "https://agent-plugins.org/schemas/1.0.0/mcp.schema.json",
+        mcpServers,
+      };
+    } else {
+      mcpJson = mcpServers;
+    }
+  } else {
+    fail(`${pluginLabel}: \`mcpServers\` must be a path string or object`);
+    continue;
+  }
+
+  if (!mcpJson) continue;
+
+  if (!validateMcp(mcpJson)) {
+    reportSchemaErrors(mcpLabel, validateMcp);
+  }
+}
+
+if (errors > 0) {
+  console.error(`\nCopilot validation failed with ${errors} error(s).`);
+  process.exit(1);
+}
+
+console.log("Copilot validation passed.");
+process.exit(0);