feat: initial agent-builder plugin (v0.1.0)

Build complete autonomous agent systems with Claude Code.
7-phase guided workflow: map work, CLAUDE.md, agent team,
pipeline, security, deployment, test.

Components:
- commands/build.md: main guided workflow
- agents/builder.md: scaffolding agent
- skills/agent-system-design: architecture knowledge + 4 references
- scripts/templates: hooks, automation, launchd, systemd

Covers 22 OpenClaw capabilities across 4 deployment targets
(local, Mac Mini, VPS, Managed Agents).

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

CLAUDE.md

@@ -0,0 +1,26 @@
+# Agent Builder Plugin
+
+Plugin that helps users build complete autonomous agent systems
+using Claude Code. Installed via `/install` or `--plugin-dir`.
+
+## What this plugin does
+
+Guides users through building their own multi-agent system:
+agents, skills, hooks, automation, and deployment config.
+The `/agent-builder:build` command runs a 7-phase guided workflow.
+
+## Plugin structure
+
+- `commands/` -- 4 user-invoked slash commands
+- `agents/` -- 2 plugin agents (builder, deployment-advisor)
+- `skills/` -- 2 auto-triggering knowledge skills
+- `scripts/templates/` -- file templates the builder copies
+  into the user's project
+
+## Rules
+
+- Never write files outside the user's project directory
+- Always ask before overwriting existing files
+- Hook templates must be bash 3.2 compatible (Intel Mac)
+- Generated agents must have valid YAML frontmatter
+- Use `${CLAUDE_PLUGIN_ROOT}` for all intra-plugin paths