Joined November 2025
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🚨Seqra just open-sourced a security analyzer that your agents will love to work with. It's called OpenTaint. The open source taint analysis engine for the AI era. github.com/seqra/opentaint Here is why you need it:
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We are testing our skills teaching @claudeai Opus 4.8 to work with the OpenTaint, and the results are promising. Codebase scale — 840 files / 131K LOC / 279 entry-surface files / ~200 sink sites. $122 for cold scan with dynamic testing. 6 vulnerabilities with PoCs.
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Fast future scans without triage costs nothing (the cross-file dataflow reachability is effectively free). Triage with dynamic testing cost depends on the number of new findings ($2–$5 per finding).
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🌱 Introducing an in-browser taint-flow viewer for OpenTaint — the most thorough taint analysis engine for Spring app security. Live demo, built from our open-source Java Kotlin Spring Boot demo app: viewer.opentaint.org/

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The demo surfaces 13 findings: • XSS across Spring controllers • Server-side template injection • SSRF through Kotlin coroutines Click any finding, walk the flow end-to-end from untrusted input to the dangerous method call, and read the rule that fired alongside the code.
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🚀 OpenTaint v0.3.0 is out — the most thorough taint analysis for Spring apps security! A release focused on detection precision: content-type-aware XSS rule with type-argument matching and analyzer precision fixes. 🌟 Star the repo: github.com/seqra/opentaint #Java #Spring #SAST
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opentaint scan
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Opus 4.7 is quite good at writing rules for OpenTaint. Right now it's writing tests for XSS taint rules, checking if XSS is real at runtime using Playwright, and tuning rules to reduce false positives.
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This is a taint rule.
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Meanwhile, static taint analysis costs nothing, runs on the CPU in minutes, and works deterministically.
$20,000 to scan one codebase that's what anthropic says it cost Mythos to find those zero days. per repo. except API tokens are currently sold at a LOSS. That "$20,000 scan" probably cost closer to $100,000 in real gpu time ffmpeg couldn't afford the subsidized price let alone the real one... if the cost doesn't come down by a huge factor this just doesn't make sense. It's Anthropic's marketing week 💀
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We build an open-source taint analyser for the AI era to make lean application security a reality. Discovering a vulnerability is only half the problem. Doing it at scale, without waste, is the other half. And for that, we need advanced formal methods more than ever.
Introducing Project Glasswing: an urgent initiative to help secure the world’s most critical software. It’s powered by our newest frontier model, Claude Mythos Preview, which can find software vulnerabilities better than all but the most skilled humans. anthropic.com/glasswing
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AI generates production code faster than today's security tooling can keep up with. The more AI writes code, the more you need formal methods underneath.
Apr 6
vibe coding is officially dead I had to say it. we thought AI would let us relax and code "on chill", but instead it turned us into architectural bureaucrats. we write strict laws, define rules, limits, and principles. if you don't obsessively review the code agent writes, your project will mutate into a massive landfill of tech debt within a month.
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I doubt LLM scanners scale for large codebases well. Not to mention the costs and unpredictability of results. Use LLMs to write rules for SAST to find new kinds of vulnerabilities and to do so precisely. Use SAST tools that allow for this.
llm-sast-scanner - github.com/SunWeb3Sec/llm-sa… A general-purpose Static Application Security Testing (SAST) skill for LLM-based code vulnerability analysis. Designed to be loaded by AI coding agents (Claude Code, OpenAI Codex, etc.) to perform structured source-to-sink taint analysis across 34 vulnerability classes.
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