Upstack
product→ stable
TDD-First Skill Suite
Upstack, developed by Anthropic, is a lightweight skill suite for Claude Code designed specifically for red/green test-driven development workflows.
1Total Mentions
+0.70Sentiment (Very Positive)
0.0%Velocity (7d)
First seen: Mar 24, 2026Last active: Mar 27, 2026
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2- Product LaunchMar 27, 2026
Released tool to enforce Red/Green TDD workflow in Claude Code projects
View source - Product LaunchMar 24, 2026
Launch of TDD-focused skill suite for Claude Code with 9 skills
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