Dik RanaDeveloper blog about systems, tools, and the things I build.https://dikrana.dev/Backtesting AI Agents: Replay to Catch Regressionshttps://dikrana.dev/blog/backtesting-ai-agents/https://dikrana.dev/blog/backtesting-ai-agents/54% of enterprises ship AI agents in production. Most cannot tell when a CLAUDE.md edit silently regresses behavior. Backtesting is the missing discipline.Sat, 25 Apr 2026 00:00:00 GMTContext Engineering in Practice: Where Does Each Piece Go?https://dikrana.dev/blog/context-engineering-in-practice/https://dikrana.dev/blog/context-engineering-in-practice/Context engineering became the #1 2026 skill shift. Anthropic's research notes context exhibits n² token relationships. Here's the per-surface decision framework.Sat, 25 Apr 2026 00:00:00 GMTTreat AI as a Team Member, Not a Chat Windowhttps://dikrana.dev/blog/treat-ai-as-a-team-member/https://dikrana.dev/blog/treat-ai-as-a-team-member/84% of developers use AI, 46% distrust it. The right scaffolding (constitution, skills, memory, MCP, subagents) turns an assistant into a team member.Sat, 18 Apr 2026 00:00:00 GMTHow to Track Claude Code 5-Hour Window Usagehttps://dikrana.dev/blog/track-claude-code-usage/https://dikrana.dev/blog/track-claude-code-usage/40.8% of devs use Claude Code, but the 5-hour window is opaque. Build a local dashboard that parses transcripts and estimates your token budget.Thu, 16 Apr 2026 00:00:00 GMTYour AI Agent Is Flying Blind Without Local Code Intelligencehttps://dikrana.dev/blog/local-code-intelligence-for-ai-agents/https://dikrana.dev/blog/local-code-intelligence-for-ai-agents/84% of developers use AI tools but 46% distrust the output. Three on-device models, 32 MCP tools, 9.93/10 relevance, and zero source code leaving your machine.Thu, 09 Apr 2026 00:00:00 GMTBuilding an LLM Wiki: From Karpathy's Gist to a Working CLIhttps://dikrana.dev/blog/building-an-llm-wiki/https://dikrana.dev/blog/building-an-llm-wiki/I turned Andrej Karpathy's LLM wiki concept into a Bun CLI (~500 lines of TypeScript) that automatically builds a persistent knowledge base from Claude Code sessions, files, and URLs.Wed, 08 Apr 2026 00:00:00 GMTHow Do You Test Systems That Analyze Behavior Over Time?https://dikrana.dev/blog/backtesting-your-application/https://dikrana.dev/blog/backtesting-your-application/Backtesting borrows from quant finance to catch temporal bugs unit tests miss. Poor US software quality costs $2.41T per year. Here's the technique.Thu, 02 Apr 2026 00:00:00 GMT