Essays from the team building tailtest, the open-source testing platform for AI-built software.https://www.tailtest.com/en-ushttps://www.tailtest.com/blog/47-oss-repos-16-real-bugs/https://www.tailtest.com/blog/47-oss-repos-16-real-bugs/We ran tailtest's adversarial test generation against 47 open source Python repos and filed 16 real bugs upstream. Methodology, categories, and what it implies.Wed, 13 May 2026 00:00:00 GMTShridip Chandolehttps://www.tailtest.com/blog/building-dev-tools-from-pune/https://www.tailtest.com/blog/building-dev-tools-from-pune/Building dev tools from Pune in 2026 with a US co-founder and a distributed team. What we learned about timezones, hiring, and the India dev ecosystem.Wed, 20 May 2026 00:00:00 GMTVarun Borawakehttps://www.tailtest.com/blog/r15-adversarial-mode-8-edge-case-categories/https://www.tailtest.com/blog/r15-adversarial-mode-8-edge-case-categories/Adversarial test generation against 47 OSS Python repos found 16 real bugs across 8 categories of edge cases AI agents systematically miss. The full taxonomy.Wed, 04 Mar 2026 00:00:00 GMTPallavi Joshihttps://www.tailtest.com/blog/the-5-levels-of-ai-testing-maturity/https://www.tailtest.com/blog/the-5-levels-of-ai-testing-maturity/Most teams shipping with AI coding agents are at Level 1 even when they think they're at Level 3. A maturity ladder for testing AI-built software: from manual catch-up to fully autonomous coverage.Tue, 28 Apr 2026 00:00:00 GMTShridip Chandolehttps://www.tailtest.com/blog/why-we-open-sourced-tailtest/https://www.tailtest.com/blog/why-we-open-sourced-tailtest/An open source AI testing tool only earns trust if you can read the code. Why we picked MIT over BSL, and what we will never gate behind a paid tier.Wed, 04 Feb 2026 00:00:00 GMTVarun Borawakehttps://www.tailtest.com/blog/why-testing-ai-generated-code-is-different/https://www.tailtest.com/blog/why-testing-ai-generated-code-is-different/Testing human-written code and testing AI-generated code share a name but very little else. Five differences that matter, and what they imply for which testing strategies actually work in 2026.Wed, 06 May 2026 00:00:00 GMTShridip Chandolehttps://www.tailtest.com/blog/ai-software-testing-for-non-developers/https://www.tailtest.com/blog/ai-software-testing-for-non-developers/AI software testing if you do not write code yourself: what the tools do, why your Claude Code app needs them, and how to set one up in one command.Tue, 17 Mar 2026 00:00:00 GMTVarun Borawakehttps://www.tailtest.com/blog/ai-test-failure-classification/https://www.tailtest.com/blog/ai-test-failure-classification/AI test failure classification routes broken tests by cause: real_bug, test_bug, or environment. Why three labels, the heuristics, and how R12 makes triage work.Mon, 13 Apr 2026 00:00:00 GMTPramod W.https://www.tailtest.com/blog/hook-based-testing-explained/https://www.tailtest.com/blog/hook-based-testing-explained/Hook-based testing fires the test loop at the agent's event boundary, not from the prompt. Why this jumps test compliance from 70 percent to 100 in practice.Wed, 18 Feb 2026 00:00:00 GMTNikhil Jatharhttps://www.tailtest.com/blog/inside-claude-code-post-tool-use-hook/https://www.tailtest.com/blog/inside-claude-code-post-tool-use-hook/What the Claude Code PostToolUse hook fires when Claude edits a file: event payload, matchers, exit codes, and how tailtest hooks the lifecycle.Mon, 30 Mar 2026 00:00:00 GMTVaishnavi Bangale