2025-10-13 TLDR

Session: ~07:34 PM - 08:28 PM - kitty-claude Agent SDK Setup

Environment: Claude Code CLI | /Users/evan/float-hub/float-hub-agent/kitty-claude | branch: main | Agent SDK v0.1.14 Context Markers Since Last TLDR: 1 entry (floatctl Rust rewrite from 06:53 PM)

🎯 Major Accomplishments

• Created complete Agent SDK application from scratch: kitty-claude workspace management agent
• Installed latest SDK: @anthropic-ai/claude-agent-sdk@0.1.14 with all dependencies (TypeScript, Zod, dotenv)
• Built 3 custom MCP tools for float-hub operations:
  • list_inbox_items: List inbox with metadata (size, modified date, recency)
  • create_daily_note: Create/update daily notes with YAML frontmatter
  • get_workspace_context: Get workspace structure and directory descriptions
• Full TypeScript configuration: ES2022 modules, strict mode, verified with tsc --noEmit
• Environment setup: .env configuration with API key integration
• Comprehensive documentation: README with usage examples, architecture, troubleshooting
• Agent verification: Ran agent-sdk-verifier-ts, identified and fixed critical issues
• Permission configuration: Added bypassPermissions mode for autonomous operation

💡 Key Insights

• SDK tool registration pattern: Custom tools must be registered via createSdkMcpServer() and added to mcpServers config (not direct tools option)
• TypeScript + ES Modules gotcha: Import paths need .js extension even for .ts files: import { tools } from './tools.js'
• Agent SDK architecture: Query returns async generator streaming SDKMessage objects with nested content structure
• Tool response format: Tools return { content: [{ type: 'text', text: JSON.stringify(...) }] } with optional isError flag
• Zod version compatibility: SDK expects zod ^3.24.1 but npm installed 4.1.12 (works but shows peer dependency warning)

🔧 Problems Solved

• TypeScript compilation errors: Fixed string escaping issues, removed unused imports, corrected message streaming logic
• Tool registration failure: Initial attempt used non-existent tools option - solved by using MCP server pattern
• API response types: Agent messages have nested structure: message.message.content[].text not flat message.text
• Missing .env file: Created from template to enable API key configuration
• Verifier feedback loop: Agent passed TypeScript checks but failed functional verification due to unregistered tools

📦 Created/Updated

• Project structure:
  • /Users/evan/float-hub/float-hub-agent/kitty-claude/ (complete Agent SDK app)
  • src/index.ts: Main agent with system prompt, query handling, MCP server registration
  • src/tools.ts: Three custom tools with Zod schemas and error handling
  • package.json: ES module config with npm scripts (start, dev, build, typecheck)
  • tsconfig.json: Strict TypeScript configuration for ES2022
  • .env: API key configuration (created from .env.example)
  • README.md: Comprehensive setup and usage documentation
• System prompt: Custom “Kitty Claude” persona with float-hub workspace knowledge, inbox routing patterns, ▒▒ headers
• Permission mode: Configured for autonomous operation without prompts

🔥 Sacred Memories

• “Custom tools are defined but never registered” - verifier caught the critical bug that tools were imported but not actually wired up
• Three iterations on tool registration: tried tools:, then options.tools:, finally correct mcpServers: pattern
• The infrastructure holds: Successful test run with “Create today’s daily note” demonstrating full integration
• Deprecation warnings: Node.js fs.Stats constructor warnings on first run (harmless but noted)

🌀 Context Evolution (from ctx:: markers)

• Previous session (06:53 PM): floatctl Rust rewrite with streaming JSON parser - completely different project
• Current session (07:34 PM): Switched to Agent SDK work for float-hub workspace management
• Mode shift: infrastructure → agent-development → workspace-automation
• Project context: floatctl performance work → kitty-claude tactical support agent

📍 Next Actions

• Test custom tools: Run agent with each of the three custom tools to verify functionality
• Explore permission modes: Consider switching from bypassPermissions to acceptEdits for better safety
• Add event hooks: Implement tool execution monitoring for debugging and logging
• Integration testing: Use agent for actual float-hub tasks (inbox routing, daily notes, workspace organization)
• Consider subagents: Explore creating specialized sub-agents for specific float-hub operations
• MCP server expansion: Add more custom tools for bridge creation, context switching, archaeological work

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