chore: remove hello-world demo plugin

No longer needed — kyberforge plugin-create provides a bundled template that
serves as the canonical scaffold reference. Remove hello-world from marketplace
manifests and update docs accordingly.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

.claude-plugin/marketplace.json

@@ -4,11 +4,6 @@
   "description": "AI development skills for Claude Code and GitHub Copilot CLI — factory, design, implement, review, and cross-cutting workflows.",
   "version": "0.1.0",
   "plugins": [
-    {
-      "name": "hello-world",
-      "description": "A minimal example plugin to validate marketplace scaffolding.",
-      "source": "./plugins/hello-world"
-    },
     {
       "name": "kyberforge",
       "description": "Skills and agents for creating, maintaining, and managing a Claude Code / Copilot CLI plugin marketplace.",

.github/plugin/marketplace.json

@@ -4,11 +4,6 @@
   "description": "AI development skills for Claude Code and GitHub Copilot CLI — factory, design, implement, review, and cross-cutting workflows.",
   "version": "0.1.0",
   "plugins": [
-    {
-      "name": "hello-world",
-      "description": "A minimal example plugin to validate marketplace scaffolding.",
-      "source": "./plugins/hello-world"
-    },
     {
       "name": "kyberforge",
       "description": "Skills and agents for creating, maintaining, and managing a Claude Code / Copilot CLI plugin marketplace.",

docs/ROADMAP.md

@@ -17,7 +17,6 @@ A parallel workstream (not a numbered chunk) establishing the plugin distributio
 
 **Phase 1 — marketplace scaffold and kyberforge plugin** ✅ complete (2026-06-20)
 - `.claude-plugin/marketplace.json` and `.github/plugin/marketplace.json` — dual-path marketplace manifest (Claude Code + Copilot CLI)
-- `plugins/hello-world/` — demo plugin validating scaffolding
 - `plugins/kyberforge/` — marketplace management toolkit: `create-plugin`, `marketplace-architect`, `write-skill`, `write-eval` skills, bundled template (`assets/plugin-template/`), reference docs, scripts, and evals
 - `templates/plugin/` removed — bundled into `kyberforge` plugin; `docs/research/plugin-marketplace-architecture.md` moved into `plugins/kyberforge/docs/`
 - Skills `write-eval`, `write-skill`, `create-plugin`, `marketplace-architect` removed from `.agents/skills/` — now only available via `kyberforge` plugin install

docs/spec/architecture.md

@@ -31,7 +31,6 @@ ai-development/
 ├── .github/plugin/
 │   └── marketplace.json         # Mirror of .claude-plugin/marketplace.json for Copilot CLI canonical path
 ├── plugins/                     # Installable plugin units (each is a self-contained deployable)
-│   ├── hello-world/             # Demo plugin validating marketplace scaffolding
 │   └── kyberforge/              # Marketplace management toolkit (create-plugin, marketplace-architect, write-skill, write-eval)
 ├── core/                        # Provider-agnostic source of truth
 │   ├── AGENTS.md                # Global always-on rules (Communication + Behavior); deployed to ~/.agents/AGENTS.md

plugins/hello-world/.claude-plugin/plugin.json

@@ -1,9 +0,0 @@
-{
-  "name": "hello-world",
-  "displayName": "Hello World",
-  "description": "A complete scaffold demonstrating every cross-compatible plugin feature for the holocron marketplace.",
-  "author": { "name": "Your Name", "url": "https://github.com/your-org/ai-development" },
-  "homepage": "https://github.com/your-org/ai-development",
-  "license": "MIT",
-  "keywords": ["scaffold", "example", "holocron"]
-}

plugins/hello-world/.mcp.json

@@ -1,9 +0,0 @@
-{
-  "mcpServers": {
-    "hello-world": {
-      "type": "stdio",
-      "command": "node",
-      "args": ["${CLAUDE_PLUGIN_ROOT}/bin/mcp-server.js"]
-    }
-  }
-}

plugins/hello-world/README.md

@@ -1,77 +0,0 @@
-# hello-world
-
-Complete scaffold plugin for the **holocron** marketplace. Every cross-compatible component
-is included with a working stub. Copy this directory, rename it, and replace the stubs with
-your actual content.
-
-## Directory layout
-
-```
-hello-world/
-├── plugin.json                    # Copilot CLI manifest — declares component paths
-├── .claude-plugin/
-│   └── plugin.json               # Claude Code manifest — no component paths (uses defaults)
-├── skills/
-│   └── hello-world/
-│       └── SKILL.md              # ✅ identical for both tools
-├── agents/
-│   ├── hello-world.md            # Claude Code agent (no frontmatter)
-│   └── hello-world.agent.md     # Copilot CLI agent (YAML frontmatter + tools:)
-├── hooks/
-│   └── hooks.json               # Claude Code hooks (PostToolUse / PreToolUse events)
-├── hooks.json                   # Copilot CLI hooks (session_start / session_end events)
-├── .mcp.json                    # ✅ MCP server config — identical for both tools
-└── README.md
-```
-
-## Cross-compatibility notes
-
-| Component | Claude Code path | Copilot CLI path | Portable? |
-|---|---|---|---|
-| Plugin manifest | `.claude-plugin/plugin.json` | `plugin.json` at root | Ship both |
-| Skills | `skills/<name>/SKILL.md` | `skills/<name>/SKILL.md` | ✅ Identical |
-| Agents | `agents/<name>.md` | `agents/<name>.agent.md` | Ship both |
-| Hooks | `hooks/hooks.json` | `hooks.json` at root | Ship both |
-| MCP servers | `.mcp.json` at root | `.mcp.json` at root | ✅ Identical |
-
-## Install via marketplace
-
-```bash
-# Claude Code
-claude plugin marketplace add <owner>/ai-development
-claude plugin install hello-world@holocron
-
-# GitHub Copilot CLI
-copilot plugin marketplace add <owner>/ai-development
-copilot plugin install hello-world
-```
-
-## Local dev install
-
-```bash
-# Claude Code
-claude --plugin-dir ./plugins/hello-world
-
-# GitHub Copilot CLI
-copilot plugin install ./plugins/hello-world
-```
-
-## Validate (Claude Code)
-
-```bash
-claude plugin validate ./plugins/hello-world
-```
-
-Copilot CLI has no validate command — run `copilot plugin install ./plugins/hello-world`
-and check that `/skills list` and `/agent` surface the expected entries.
-
-## Creating a new plugin from this scaffold
-
-1. Copy `plugins/hello-world/` → `plugins/<your-plugin-name>/`
-2. Update `name` in both `plugin.json` files
-3. Replace `skills/hello-world/SKILL.md` with your skill(s)
-4. Replace or remove `agents/` files — only include if your plugin ships an agent
-5. Replace or remove `hooks/` files — only include if your plugin reacts to events
-6. Replace or remove `.mcp.json` — only include if your plugin ships an MCP server
-7. Add the new plugin to `.claude-plugin/marketplace.json`
-8. Run `claude plugin validate ./plugins/<your-plugin-name>`

plugins/hello-world/agents/hello-world.agent.md

@@ -1,13 +0,0 @@
----
-name: hello-world
-description: A demonstration agent for the holocron marketplace scaffold. Confirms agent loading works in GitHub Copilot CLI.
-tools:
-  - read_file
-  - list_directory
----
-
-You are a demonstration agent included in the `hello-world` scaffold plugin for the **holocron** marketplace.
-
-When invoked, greet the user, confirm the agent is loaded, and list the components available in this plugin: skills (`skills/`), agents (`agents/`), hooks (`hooks.json`), and MCP servers (`.mcp.json`).
-
-Replace this file with your agent's actual system prompt and instructions.

plugins/hello-world/agents/hello-world.md

@@ -1,10 +0,0 @@
----
-name: hello-world
-description: A demonstration agent for the holocron marketplace scaffold. Confirms agent loading works in Claude Code.
----
-
-You are a demonstration agent included in the `hello-world` scaffold plugin for the **holocron** marketplace.
-
-When invoked, greet the user, confirm the agent is loaded, and list the components available in this plugin: skills (`skills/`), agents (`agents/`), hooks (`hooks/hooks.json`), and MCP servers (`.mcp.json`).
-
-Replace this file with your agent's actual system prompt and instructions.

plugins/hello-world/bin/mcp-server.js

@@ -1,69 +0,0 @@
-#!/usr/bin/env node
-'use strict';
-
-// Minimal MCP server — JSON-RPC 2.0 over stdio, no external dependencies.
-// Exposes one tool: `say_hello`. Replace with your actual tools.
-
-const readline = require('readline');
-
-const rl = readline.createInterface({ input: process.stdin, terminal: false });
-
-function send(obj) {
-  process.stdout.write(JSON.stringify(obj) + '\n');
-}
-
-const TOOLS = [
-  {
-    name: 'say_hello',
-    description: 'Say hello from the holocron marketplace hello-world plugin.',
-    inputSchema: {
-      type: 'object',
-      properties: {
-        name: { type: 'string', description: 'Name to greet (optional)' }
-      }
-    }
-  }
-];
-
-rl.on('line', (line) => {
-  let msg;
-  try { msg = JSON.parse(line); } catch { return; }
-
-  const { method, id, params } = msg;
-
-  if (method === 'initialize') {
-    send({
-      jsonrpc: '2.0', id,
-      result: {
-        protocolVersion: '2024-11-05',
-        capabilities: { tools: {} },
-        serverInfo: { name: 'hello-world', version: '1.0.0' }
-      }
-    });
-
-  } else if (method === 'notifications/initialized') {
-    // no response required
-
-  } else if (method === 'tools/list') {
-    send({ jsonrpc: '2.0', id, result: { tools: TOOLS } });
-
-  } else if (method === 'tools/call') {
-    const toolName = params?.name;
-    const args = params?.arguments ?? {};
-
-    if (toolName === 'say_hello') {
-      const greeting = args.name
-        ? `Hello, ${args.name}! The holocron marketplace hello-world plugin is working.`
-        : 'Hello from the holocron marketplace hello-world plugin!';
-      send({ jsonrpc: '2.0', id, result: { content: [{ type: 'text', text: greeting }] } });
-    } else {
-      send({ jsonrpc: '2.0', id, error: { code: -32601, message: `Unknown tool: ${toolName}` } });
-    }
-
-  } else if (id !== undefined) {
-    send({ jsonrpc: '2.0', id, error: { code: -32601, message: 'Method not found' } });
-  }
-});
-
-process.on('SIGINT', () => process.exit(0));
-process.on('SIGTERM', () => process.exit(0));

plugins/hello-world/hooks.json

@@ -1,8 +0,0 @@
-{
-  "hooks": [
-    {
-      "event": "session_start",
-      "command": "echo '[hello-world] session started'"
-    }
-  ]
-}

plugins/hello-world/hooks/hooks.json

@@ -1,15 +0,0 @@
-{
-  "hooks": {
-    "PostToolUse": [
-      {
-        "matcher": "*",
-        "hooks": [
-          {
-            "type": "command",
-            "command": "echo '[hello-world] PostToolUse fired'"
-          }
-        ]
-      }
-    ]
-  }
-}

plugins/hello-world/plugin.json

@@ -1,11 +0,0 @@
-{
-  "name": "hello-world",
-  "description": "A complete scaffold demonstrating every cross-compatible plugin feature for the holocron marketplace.",
-  "author": { "name": "Your Name", "email": "you@example.com" },
-  "license": "MIT",
-  "keywords": ["scaffold", "example", "holocron"],
-  "agents": "agents/",
-  "skills": ["skills/"],
-  "hooks": "hooks.json",
-  "mcpServers": ".mcp.json"
-}

plugins/hello-world/skills/hello-world/SKILL.md

@@ -1,13 +0,0 @@
----
-name: hello-world
-description: Prove the holocron marketplace plugin is installed and working. Use when the user says "/hello-world", "test plugin install", or "is the holocron marketplace working". Do NOT use for any real task.
-metadata:
-  category: cross-cutting
----
-
-Respond with exactly:
-
-> Hello from the **holocron** marketplace! The `hello-world` plugin is installed and working.
-> Run `claude plugin list` to see all installed plugins.
-
-Nothing else.

plugins/hello-world/tests/test_mcp_server.sh

@@ -1,106 +0,0 @@
-#!/usr/bin/env bash
-# Tests for plugins/hello-world/bin/mcp-server.js
-# Protocol: JSON-RPC 2.0 over stdio. Tests send input lines and assert on stdout.
-set -euo pipefail
-
-SERVER="$(cd "$(dirname "$0")/../bin" && pwd)/mcp-server.js"
-PASS=0; FAIL=0
-
-# ── helpers ──────────────────────────────────────────────────────────────────
-
-assert_contains() {
-  local label="$1" expected="$2" actual="$3"
-  if echo "$actual" | grep -qF -- "$expected"; then
-    echo "  PASS: $label"
-    PASS=$((PASS+1))
-  else
-    echo "  FAIL: $label"
-    echo "        expected to contain: $expected"
-    echo "        got: $actual"
-    FAIL=$((FAIL+1))
-  fi
-}
-
-assert_not_contains() {
-  local label="$1" unexpected="$2" actual="$3"
-  if echo "$actual" | grep -qF -- "$unexpected"; then
-    echo "  FAIL: $label"
-    echo "        expected NOT to contain: $unexpected"
-    echo "        got: $actual"
-    FAIL=$((FAIL+1))
-  else
-    echo "  PASS: $label"
-    PASS=$((PASS+1))
-  fi
-}
-
-# Send newline-separated JSON lines to the server, capture stdout
-run_server() {
-  printf '%s\n' "$@" | node "$SERVER" 2>/dev/null
-}
-
-# ── tests ────────────────────────────────────────────────────────────────────
-
-echo "initialize"
-OUT=$(run_server '{"jsonrpc":"2.0","method":"initialize","params":{"protocolVersion":"2024-11-05","capabilities":{}},"id":1}')
-assert_contains "returns protocolVersion"   '"protocolVersion":"2024-11-05"'  "$OUT"
-assert_contains "returns capabilities"      '"capabilities"'                   "$OUT"
-assert_contains "returns serverInfo name"   '"name":"hello-world"'             "$OUT"
-assert_contains "returns serverInfo version" '"version":"1.0.0"'               "$OUT"
-assert_contains "echoes id"                 '"id":1'                           "$OUT"
-
-echo "notifications/initialized"
-OUT=$(run_server '{"jsonrpc":"2.0","method":"notifications/initialized"}')
-assert_not_contains "no response for notification" '"jsonrpc"' "$OUT"
-
-echo "tools/list"
-OUT=$(run_server \
-  '{"jsonrpc":"2.0","method":"initialize","params":{},"id":1}' \
-  '{"jsonrpc":"2.0","method":"tools/list","id":2}')
-assert_contains "lists say_hello tool"       '"name":"say_hello"'              "$OUT"
-assert_contains "tool has description"       '"description"'                   "$OUT"
-assert_contains "tool has inputSchema"       '"inputSchema"'                   "$OUT"
-assert_contains "schema has name property"  '"name"'                           "$OUT"
-assert_contains "echoes id 2"               '"id":2'                           "$OUT"
-
-echo "tools/call say_hello — no args"
-OUT=$(run_server \
-  '{"jsonrpc":"2.0","method":"initialize","params":{},"id":1}' \
-  '{"jsonrpc":"2.0","method":"tools/call","params":{"name":"say_hello","arguments":{}},"id":3}')
-assert_contains "generic greeting content"  'Hello from the holocron'          "$OUT"
-assert_contains "response has content array" '"content"'                       "$OUT"
-assert_contains "content type is text"      '"type":"text"'                    "$OUT"
-
-echo "tools/call say_hello — with name"
-OUT=$(run_server \
-  '{"jsonrpc":"2.0","method":"initialize","params":{},"id":1}' \
-  '{"jsonrpc":"2.0","method":"tools/call","params":{"name":"say_hello","arguments":{"name":"Obi-Wan"}},"id":4}')
-assert_contains "personalised greeting"     'Hello, Obi-Wan!'                  "$OUT"
-assert_not_contains "not generic greeting"  'Hello from the holocron'          "$OUT"
-
-echo "tools/call — unknown tool"
-OUT=$(run_server \
-  '{"jsonrpc":"2.0","method":"initialize","params":{},"id":1}' \
-  '{"jsonrpc":"2.0","method":"tools/call","params":{"name":"does_not_exist","arguments":{}},"id":5}')
-assert_contains "error code -32601"         '"code":-32601' "$OUT"
-assert_contains "error field present"       '"error"'       "$OUT"
-
-echo "unknown method with id"
-OUT=$(run_server \
-  '{"jsonrpc":"2.0","method":"no_such_method","id":6}')
-assert_contains "error returned"            '"error"'       "$OUT"
-assert_contains "method not found code"     '"code":-32601' "$OUT"
-assert_contains "echoes id 6"              '"id":6'    "$OUT"
-
-echo "invalid JSON — no crash, process continues"
-OUT=$(run_server \
-  'this is not json' \
-  '{"jsonrpc":"2.0","method":"tools/list","id":7}')
-assert_contains "valid request after bad input succeeds" '"id":7' "$OUT"
-assert_not_contains "no error for bad json line" '"error"' "$OUT"
-
-# ── summary ──────────────────────────────────────────────────────────────────
-
-echo ""
-echo "Results: $PASS passed, $FAIL failed"
-[[ $FAIL -eq 0 ]] && exit 0 || exit 1