https://sentinel-blog.cherrypod.org/tags/architecture/Recent content in Architecture on Sentinelhttps://sentinel-blog.cherrypod.org/images/social-preview.pnghttps://sentinel-blog.cherrypod.org/images/social-preview.pngHugo -- 0.147.0en-gbSat, 21 Feb 2026 00:00:00 +0000https://sentinel-blog.cherrypod.org/posts/52-the-refactor/Sat, 21 Feb 2026 00:00:00 +0000https://sentinel-blog.cherrypod.org/posts/52-the-refactor/The codebase had grown fast. Features landed, bugs got fixed, new capabilities kept shipping. Then a structural audit revealed what that pace had cost: god files, god functions, and a growing maintenance burden.https://sentinel-blog.cherrypod.org/posts/51-goal-verification/Fri, 20 Feb 2026 00:00:00 +0000https://sentinel-blog.cherrypod.org/posts/51-goal-verification/The planner could execute multi-step tasks. But it had no way to verify its own work. If a step failed silently, it carried on regardless. Time to close the loop.https://sentinel-blog.cherrypod.org/posts/50-attachment-pipeline/Thu, 19 Feb 2026 00:00:00 +0000https://sentinel-blog.cherrypod.org/posts/50-attachment-pipeline/Sentinel could generate code, build websites, write files. But every piece of content was synthetic — generated from scratch by an LLM. What if it could use real photos, real videos, real documents?https://sentinel-blog.cherrypod.org/posts/49-weather-crypto-tools/Wed, 18 Feb 2026 00:00:00 +0000https://sentinel-blog.cherrypod.org/posts/49-weather-crypto-tools/Sentinel could browse the web. It could read files and write code. But it couldn’t answer ‘what’s the weather?’ without fabricating something. Time to give it real data backends.https://sentinel-blog.cherrypod.org/posts/48-anchor-allocator/Tue, 17 Feb 2026 00:00:00 +0000https://sentinel-blog.cherrypod.org/posts/48-anchor-allocator/file_patch needs the planner to find a unique anchor string in existing code. The planner is bad at this. What if the system placed named markers instead?https://sentinel-blog.cherrypod.org/posts/45-multi-user/Sat, 14 Feb 2026 00:00:00 +0000https://sentinel-blog.cherrypod.org/posts/45-multi-user/Sentinel was built for one person. Making it work for multiple users meant rethinking auth, isolation, and how the system tracks who’s who.https://sentinel-blog.cherrypod.org/posts/44-task-verification/Fri, 13 Feb 2026 00:00:00 +0000https://sentinel-blog.cherrypod.org/posts/44-task-verification/Tasks were reporting success based on whether steps completed, not whether the goal was achieved. Building a verification system to tell the difference.https://sentinel-blog.cherrypod.org/posts/43-plan-outcome-memory/Thu, 12 Feb 2026 00:00:00 +0000https://sentinel-blog.cherrypod.org/posts/43-plan-outcome-memory/The system could remember what happened during tasks, but not what the plan was or whether it worked. Adding plan-outcome memory to close the loop.https://sentinel-blog.cherrypod.org/posts/41-file-patch/Tue, 10 Feb 2026 00:00:00 +0000https://sentinel-blog.cherrypod.org/posts/41-file-patch/Full-file regeneration breaks at scale. The new tool generates only the changed fragments and splices them deterministically.https://sentinel-blog.cherrypod.org/posts/40-the-model-upgrade/Mon, 09 Feb 2026 00:00:00 +0000https://sentinel-blog.cherrypod.org/posts/40-the-model-upgrade/Tested three planner models on identical tasks. The surprise: upgrading the planner fixed the worker’s bugs.https://sentinel-blog.cherrypod.org/posts/38-the-classifier-swap/Sat, 07 Feb 2026 00:00:00 +0000https://sentinel-blog.cherrypod.org/posts/38-the-classifier-swap/The LLM classifier was slow, expensive, and occasionally wrong. A deterministic keyword matcher replaced it in microseconds with zero GPU.https://sentinel-blog.cherrypod.org/posts/29-learning-from-experience/Thu, 29 Jan 2026 00:00:00 +0000https://sentinel-blog.cherrypod.org/posts/29-learning-from-experience/Cross-session episodic memory — the system remembers what worked, what failed, and applies that knowledge to future tasks.https://sentinel-blog.cherrypod.org/posts/25-the-code-fixer/Sun, 25 Jan 2026 00:00:00 +0000https://sentinel-blog.cherrypod.org/posts/25-the-code-fixer/LLMs generate broken code. The code fixer catches it before it hits the filesystem — 7 auto-fixers across 10+ languages.https://sentinel-blog.cherrypod.org/posts/24-breaking-up-the-monolith/Sat, 24 Jan 2026 00:00:00 +0000https://sentinel-blog.cherrypod.org/posts/24-breaking-up-the-monolith/The orchestrator was doing too much. Six phases to extract it into focused modules without breaking a single security invariant.https://sentinel-blog.cherrypod.org/posts/23-the-database-migration/Fri, 23 Jan 2026 00:00:00 +0000https://sentinel-blog.cherrypod.org/posts/23-the-database-migration/SQLite to PostgreSQL. Store protocols, async rewrite, data migration, and then ripping out every line of SQLite code.https://sentinel-blog.cherrypod.org/posts/22-the-router/Thu, 22 Jan 2026 00:00:00 +0000https://sentinel-blog.cherrypod.org/posts/22-the-router/Not every request needs a frontier model to plan it. The router classifies incoming messages and takes the fast path when it can.https://sentinel-blog.cherrypod.org/posts/20-the-interface/Tue, 20 Jan 2026 00:00:00 +0000https://sentinel-blog.cherrypod.org/posts/20-the-interface/Giving Sentinel a proper UI — dashboard health cards, chat, memory browser, routine management, and a GSP mascot.https://sentinel-blog.cherrypod.org/posts/12-the-trust-ladder/Mon, 12 Jan 2026 00:00:00 +0000https://sentinel-blog.cherrypod.org/posts/12-the-trust-ladder/Five trust levels, from full human approval to autonomous execution. Each one its own project.https://sentinel-blog.cherrypod.org/posts/10-the-sandbox/Sat, 10 Jan 2026 00:00:00 +0000https://sentinel-blog.cherrypod.org/posts/10-the-sandbox/Every shell command runs in a disposable container. No state leaks, no network, no capabilities. Or so I thought.https://sentinel-blog.cherrypod.org/posts/03-why-sentinel-exists/Sat, 03 Jan 2026 00:00:00 +0000https://sentinel-blog.cherrypod.org/posts/03-why-sentinel-exists/From a custom PC build to containers, local LLMs, and the paper that started it all — CaMeL.