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+---
+visibility: public
+---
+
+# data & analysis
+
+## data exploration
+
+- **[CSV Data Summarizer](https://github.com/coffeefuelbump/csv-data-summarizer-claude-skill)** — auto-analyzes CSV files with visualizations. by @coffeefuelbump. pair with [D3.js](https://github.com/chrisvoncsefalvay/claude-d3js-skill) from [[creative-and-media]] for richer visuals.
+- **[postgres](https://github.com/sanjay3290/ai-skills/tree/main/skills/postgres)** — safe read-only SQL queries with defense-in-depth security. by @sanjay3290
+- **[graphify](https://github.com/safishamsi/graphify)** (22.1k stars) — turn any folder into a queryable knowledge graph. also in [[communication-and-writing]].
+
+## research
+
+- **[deep-research](https://github.com/sanjay3290/ai-skills/tree/main/skills/deep-research)** — autonomous multi-step research via Gemini. also in [[development]] and [[communication-and-writing]].
+- **[last30days](https://github.com/mvanhorn/last30days-skill)** (20.7k stars) — cross-platform topic research. also in [[communication-and-writing]].
+- **[scientific-agent-skills](https://github.com/K-Dense-AI/scientific-agent-skills)** (18.1k stars) — research, science, engineering, analysis, finance, writing.
+
+## debugging
+
+- **[root-cause-tracing](https://github.com/obra/superpowers/tree/main/skills/root-cause-tracing)** — traces errors to original trigger. from [[frameworks|obra/superpowers]].
+- **[systematic-debugging](https://github.com/obra/superpowers/tree/main/skills/systematic-debugging)** — structured debugging. also in [[development]].
+- **[LangSmith Fetch](https://github.com/ComposioHQ/awesome-claude-skills/tree/main/langsmith-fetch/)** — debug LangChain/LangGraph via execution traces. by @OthmanAdi
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