Software engineering, AI agents, open source projects, and satirical commentary. A mixed bag from a Pečan.https://pecan.si/https://pecan.si/posts/share-the-mark-pointing-instead-of-describing/https://pecan.si/posts/share-the-mark-pointing-instead-of-describing/The feedback loop between me and my coding agent was broken: I could see the UI problem, but describing it in text was lossy and slow. So I built share-the-mark, a browser extension and CLI that hands an agent your exact markup of a live page.Mon, 29 Jun 2026 07:00:00 GMTbrowser extensionClaude CodeAI toolingWXTTypeScriptRustopen sourcedesign feedbackhttps://pecan.si/posts/short-story-the-simulation-runner/https://pecan.si/posts/short-story-the-simulation-runner/A memoir about losing my brother Lojze, the chaos of bringing him home, and the comforting fiction that maybe he was running the show all along.Sat, 27 Jun 2026 07:36:34 GMTshort storymemoirgrieffictionhttps://pecan.si/posts/what-googles-defamation-banner-says-about-lap/https://pecan.si/posts/what-googles-defamation-banner-says-about-lap/Google Maps now publishes how many reviews each business has had removed for defamation. Applying this to LAP Coffee's 32 German locations reveals an effective rating that sits almost a full star below what's displayed.Mon, 27 Apr 2026 15:46:42 GMTGoogle Mapsdata analysisreviewsLAP CoffeeBerlinClaude CoWorkhttps://pecan.si/posts/claude-building-a-bash-parser/https://pecan.si/posts/claude-building-a-bash-parser/How I had Claude Code build rable, a Rust bash parser, from scratch using Parable's test suite — reaching 99.9% accuracy and replacing tree-sitter-bash in tokf.Wed, 25 Mar 2026 16:54:31 GMTRustLLMtoolingClaude Codeopen sourcetoken compressionCLItokfparsinghttps://pecan.si/posts/getting-into-make-just-and-hooks/https://pecan.si/posts/getting-into-make-just-and-hooks/How tokf intercepts subcommands inside Make, Just, and git hooks by injecting custom shells and shimming PATH lookups — extending token compression to nested tool invocations.Sun, 08 Mar 2026 16:41:57 GMTRustLLMtoolingClaude Codetoken compressionCLItokfhttps://pecan.si/posts/tokf-a-different-approach-to-token-compression/https://pecan.si/posts/tokf-a-different-approach-to-token-compression/How tokF uses declarative TOML pipelines to compress CLI output before it reaches an LLM, cutting token usage by up to 90%. A story of scratching an itch and building a tool in two days.Fri, 20 Feb 2026 16:59:35 GMTRustLLMtoolingClaude Codeopen sourcetoken compressionCLIhttps://pecan.si/posts/finding-duplicate-rust-code-through-ast-normalization/https://pecan.si/posts/finding-duplicate-rust-code-through-ast-normalization/How cargo-dupes finds structurally identical Rust functions by parsing code into ASTs, replacing identifiers with positional placeholders, and fingerprinting the normalized trees. Part 1 of a series on duplicate detection.Sat, 14 Feb 2026 18:49:53 GMTRustcargoASTcode analysisopen sourceClaude Codetoolinghttps://pecan.si/posts/building-an-mcp-for-stfu/https://pecan.si/posts/building-an-mcp-for-stfu/Implementing an MCP server for STFU and attempting to connect it to Claude.ai. A journey through OAuth, stateless handlers, and discovering why the claude.ai custom connector just won't connect.Mon, 02 Feb 2026 09:00:00 GMTMCPClaude CodeClaude.aiOAuthSTFUdebuggingVercelhttps://pecan.si/posts/experimenting-with-mcps/https://pecan.si/posts/experimenting-with-mcps/Building an MCP to help Claude Code refactor more efficiently, and a benchmarking tool to test it. The results were... educational.Mon, 26 Jan 2026 16:29:01 GMTMCPClaude CodeRustbenchmarkingAI toolinghttps://pecan.si/posts/how-i-taught-an-ai/https://pecan.si/posts/how-i-taught-an-ai/The evolution of an AI content generation pipeline - from a monolithic 962-line file to a multi-agent system with 2000+ tests and hexagonal architecture.Mon, 19 Jan 2026 17:16:29 GMTAIside-projectarchitectureClaudecontent-generationrefactoringtypescriptmulti-agenthttps://pecan.si/posts/stfu-the-basics/https://pecan.si/posts/stfu-the-basics/An introduction to STFU - an AI-powered satirical diary generator that creates daily entries for billionaires reimagined as aliens, vampires, and reptilians.Sat, 17 Jan 2026 07:52:18 GMTAIside-projectcloudflarearchitecturesatireautomationClaudecontent-generation