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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Mentions × Lab Attention
Weekly mentions (solid) and average article relevance (dotted)
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Timeline
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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Sentiment History
Positive sentiment
Negative sentiment
Range: -1 to +1
| Week | Avg Sentiment | Mentions |
|---|---|---|
| 2026-W13 | 0.70 | 1 |