Notes from building MCP servers, autonomous trading agents, and the systems around them. Weekly Le Raviole newsletter + ad-hoc posts.https://raviolelabs.com/en-us© 2026 Raviole LabsAstro60https://raviolelabs.com/icon-192.pnghttps://raviolelabs.com/https://raviolelabs.com/blog/claude-is-pessimistic/https://raviolelabs.com/blog/claude-is-pessimistic/Claude routinely sandbags time estimates, suggests breaks, and defers work that another instance ships in 10 minutes. Field notes from a session where the gap was 100x, plus a skill that forbids the pattern.Fri, 22 May 2026 00:00:00 GMTclaudeai agentsbuilding with aianti-patternsproductivitynoreply@raviolelabs.com (LeRaviole)https://raviolelabs.com/blog/what-is-mcp-complete-guide/https://raviolelabs.com/blog/what-is-mcp-complete-guide/MCP (Model Context Protocol) is the open standard that lets any AI agent, Claude, Cursor, Windsurf, Clawbot, call external tools and data sources. Here's how it works, why it matters, and what to build with it.Tue, 19 May 2026 00:00:00 GMTmcpai agentstool callinganthropicguidenoreply@raviolelabs.com (LeRaviole)https://raviolelabs.com/blog/polymarket-hyperliquid-mcp-integration/https://raviolelabs.com/blog/polymarket-hyperliquid-mcp-integration/Use PredMCP to expose live Polymarket markets, Hyperliquid perpetual funding, open interest, whale flows, and cross-venue divergence signals to Claude Desktop, Cursor, or any tool-using LLM. Free tier, no glue code.Mon, 18 May 2026 00:00:00 GMTmcppolymarkethyperliquidpredmcptradingnoreply@raviolelabs.com (LeRaviole)https://raviolelabs.com/blog/browser-mcp-vs-playwright-puppeteer/https://raviolelabs.com/blog/browser-mcp-vs-playwright-puppeteer/Why a browser MCP server beats raw Playwright or Puppeteer when your AI agent needs to operate real web UIs. Stealth, sessions, fallbacks, and what a 46-tool browser MCP (RoverMCP) actually exposes.Sun, 17 May 2026 00:00:00 GMTmcpbrowser automationrovermcpplaywrightpuppeteerai agentsnoreply@raviolelabs.com (LeRaviole)https://raviolelabs.com/blog/hello-raviole-labs/https://raviolelabs.com/blog/hello-raviole-labs/Why we're building MCP servers, what we ship, and what we don't.Sat, 16 May 2026 00:00:00 GMTintromcpnoreply@raviolelabs.com (Raviole Labs)https://raviolelabs.com/blog/cross-venue-divergence-thesis/https://raviolelabs.com/blog/cross-venue-divergence-thesis/Three venues price the same event differently. The disagreement is the signal. Here's how PredMCP makes it tractable for an agent.Fri, 15 May 2026 00:00:00 GMTpredmcppolymarkethyperliquidsignalsnoreply@raviolelabs.com (Raviole Labs)