News and Updates from Kristian Papadakishttps://kristianpapadakis.com/en-GBhttps://kristianpapadakis.com/writing/the-file-only-machines-readhttps://kristianpapadakis.com/writing/the-file-only-machines-readAn audit that found a machine-readable file no parser could read, contrast failing at 2.76 against a 4.5 minimum, and dead URLs in the one file LLMs actually fetch. None of it was visible in a browser.Sun, 26 Jul 2026 09:00:00 GMTKristian Papadakishttps://kristianpapadakis.com/writing/bugs-about-the-worldhttps://kristianpapadakis.com/writing/bugs-about-the-worldSeven review rounds on a ticketing and refunds path - quantity handling, refund scope, idempotency keys, a DST test that passed against two wrong implementations, and two features worth refusing to build.Sat, 25 Jul 2026 11:00:00 GMTKristian Papadakishttps://kristianpapadakis.com/writing/the-migration-that-hit-the-wrong-databasehttps://kristianpapadakis.com/writing/the-migration-that-hit-the-wrong-databaseHow a mismatch between DATABASE_URL and DB_URL sent a staging migration to a local dev database, why the error message pointed the wrong way, and why fallbacks belong nowhere near migration tooling.Fri, 24 Jul 2026 18:00:00 GMTKristian Papadakishttps://kristianpapadakis.com/writing/the-403-that-was-not-from-the-vendorhttps://kristianpapadakis.com/writing/the-403-that-was-not-from-the-vendorHow a default Python user agent triggered a Cloudflare bot ban on an email API, why the blast radius was wider than the reported symptom, and what a transport-layer test double stops you from ever testing.Fri, 17 Jul 2026 20:00:00 GMTKristian Papadakishttps://kristianpapadakis.com/writing/building-an-mcp-server-people-actually-usehttps://kristianpapadakis.com/writing/building-an-mcp-server-people-actually-useThe design of a production MCP server that lets a customer's own AI drive your software - tool granularity, naming, recoverable errors, auth, and where to put the human. Product meets protocol.Fri, 17 Jul 2026 16:00:00 GMTKristian Papadakishttps://kristianpapadakis.com/writing/the-filesystem-is-my-databasehttps://kristianpapadakis.com/writing/the-filesystem-is-my-databaseWhy the AI operator running my business stores everything in plain markdown files instead of a database - three-tier memory, wikilinks, no app server, no build step, and the case for the boring storage layer.Fri, 17 Jul 2026 14:00:00 GMTKristian Papadakishttps://kristianpapadakis.com/writing/how-my-company-runs-from-my-phone-on-claude-codehttps://kristianpapadakis.com/writing/how-my-company-runs-from-my-phone-on-claude-codeThe daily reality of running a business through an AI operator on Claude Code - the morning brief, five execution lanes, an overnight dream cycle, and approving instead of doing, all from a phone.Fri, 17 Jul 2026 12:00:00 GMTKristian Papadakishttps://kristianpapadakis.com/writing/i-built-an-ai-operator-that-runs-a-company-end-to-endhttps://kristianpapadakis.com/writing/i-built-an-ai-operator-that-runs-a-company-end-to-endHow I built an agent OS on Claude Code that runs a real B2B business end to end - routing, roles, memory, MCP, human-in-the-loop approvals - and the architecture decisions behind it.Fri, 17 Jul 2026 09:00:00 GMTKristian Papadakishttps://kristianpapadakis.com/writing/redirects-that-were-never-therehttps://kristianpapadakis.com/writing/redirects-that-were-never-thereMoving a site from Rails to Astro: why redirect files are host-specific dialects, how to verify a cutover by diffing behaviour rather than counting 200s, and the failure modes that never surface in a build log.Mon, 06 Jul 2026 19:00:00 GMTKristian Papadakishttps://kristianpapadakis.com/writing/ci-was-running-everything-twicehttps://kristianpapadakis.com/writing/ci-was-running-everything-twiceWhy three workflows ran the full test suite twice per push, how a local-first gating model cut Actions usage to near zero, and the one job that should never move to a self-hosted runner.Tue, 23 Jun 2026 17:00:00 GMTKristian Papadakis