Ivan MagdaWriting about AI agents and software development.https://ivanmagda.dev/enFixing the 40k CLAUDE.md Warning in a Monorepohttps://ivanmagda.dev/posts/fixing-40k-claude-md-warning-monorepo/https://ivanmagda.dev/posts/fixing-40k-claude-md-warning-monorepo/How we restructured Claude Code's CLAUDE.md files in a monorepo to cut 73% of always-loaded context without losing a single fact.Sun, 19 Apr 2026 09:37:34 GMTclaude-codeai-agentsdeveloper-toolscontext-engineeringFive Things I Learned About Making AI Coding Agents Actually Workhttps://ivanmagda.dev/posts/five-things-ai-coding-agents-actually-work/https://ivanmagda.dev/posts/five-things-ai-coding-agents-actually-work/The biggest gains in AI agent performance come from the system around the model, not the model itself.Sun, 19 Apr 2026 09:37:34 GMTai-agentsclaude-codecontext-engineeringBuilding a Coding Agent in Swift, Part 8: Background Taskshttps://ivanmagda.dev/posts/s08-background-tasks/https://ivanmagda.dev/posts/s08-background-tasks/Swift actors for background execution — the one type that truly needs an actor, with notification injection before each API call.Wed, 18 Mar 2026 10:00:00 GMTswiftcoding-agentsswift-claude-codeBuilding a Coding Agent in Swift, Part 7: Task Systemhttps://ivanmagda.dev/posts/s07-task-system/https://ivanmagda.dev/posts/s07-task-system/A file-based task DAG with dependency resolution — durable planning that survives context compaction.Tue, 17 Mar 2026 10:00:00 GMTswiftcoding-agentsswift-claude-codeBuilding a Coding Agent in Swift, Part 6: Context Compactionhttps://ivanmagda.dev/posts/s06-context-compaction/https://ivanmagda.dev/posts/s06-context-compaction/A three-layer compression strategy — micro-compaction, auto-compaction, and manual compaction — for infinite conversations.Mon, 16 Mar 2026 10:00:00 GMTswiftcoding-agentsswift-claude-codeBuilding a Coding Agent in Swift, Part 5: Skill Loadinghttps://ivanmagda.dev/posts/s05-skill-loading/https://ivanmagda.dev/posts/s05-skill-loading/Two-layer knowledge injection — cheap awareness in the system prompt, full skill bodies loaded on demand via tool results.Sun, 15 Mar 2026 10:00:00 GMTswiftcoding-agentsswift-claude-codeBuilding a Coding Agent in Swift, Part 4: Subagentshttps://ivanmagda.dev/posts/s04-subagents/https://ivanmagda.dev/posts/s04-subagents/Context isolation through recursive agent loops — spawning child agents with restricted tool sets for focused subtasks.Sat, 14 Mar 2026 10:00:00 GMTswiftcoding-agentsswift-claude-codeBuilding a Coding Agent in Swift, Part 3: Self-Managed Task Trackinghttps://ivanmagda.dev/posts/s03-self-managed-task-tracking/https://ivanmagda.dev/posts/s03-self-managed-task-tracking/A Codable todo system with validation constraints and nag reminders — giving the agent a structured notepad it writes for itself.Fri, 13 Mar 2026 10:00:00 GMTswiftcoding-agentsswift-claude-codeBuilding a Coding Agent in Swift, Part 2: Tool Dispatchhttps://ivanmagda.dev/posts/s02-tool-dispatch/https://ivanmagda.dev/posts/s02-tool-dispatch/Dictionary-based tool dispatch, path sandboxing, and the read/write/edit file tools that let the agent work with code.Thu, 12 Mar 2026 10:00:00 GMTswiftcoding-agentsswift-claude-codeBuilding a Coding Agent in Swift, Part 1: The Agent Loophttps://ivanmagda.dev/posts/s01-the-agent-loop/https://ivanmagda.dev/posts/s01-the-agent-loop/The agent loop that drives everything — how a single stopReason check turns an API client into an autonomous agent.Wed, 11 Mar 2026 10:00:00 GMTswiftcoding-agentsswift-claude-codeBuilding a Coding Agent in Swift, Part 0: Bootstrapping the Projecthttps://ivanmagda.dev/posts/s00-bootstrapping-the-project/https://ivanmagda.dev/posts/s00-bootstrapping-the-project/Setting up a two-target SPM package, strict concurrency, and AsyncHTTPClient — the foundation for a CLI agent that never needs restructuring.Tue, 10 Mar 2026 10:00:00 GMTswiftcoding-agentsswift-claude-code