docs: add daemon technical analysis and update agent instructions

- Add comprehensive daemon architecture documentation to CLAUDE.md
- Update AGENTS.md with AI workflow guidelines
- Document auto-sync configuration for simpler agent workflows

Co-Authored-By: SageOx <ox@sageox.ai>

AGENTS.md

@@ -4,6 +4,22 @@ See [CLAUDE.md](CLAUDE.md) for full instructions.
 
 This file exists for compatibility with tools that look for AGENTS.md.
 
+## Key Sections in CLAUDE.md
+
+- **Issue Tracking** - How to use bd for work management
+- **Development Guidelines** - Code standards and testing
+- **Visual Design System** - Status icons, colors, and semantic styling for CLI output
+
+## Visual Design Anti-Patterns
+
+**NEVER use emoji-style icons** (🔴🟠🟡🔵⚪) in CLI output. They cause cognitive overload.
+
+**ALWAYS use small Unicode symbols** with semantic colors:
+- Status: `○ ◐ ● ✓ ❄`
+- Priority: `● P0` (filled circle with color)
+
+See CLAUDE.md "Visual Design System" section for full guidance.
+
 ## Landing the Plane (Session Completion)
 
 **When ending a work session**, you MUST complete ALL steps below. Work is NOT complete until `git push` succeeds.