# Deep Analysis > Advanced problem-solving skill using sequential thinking. Use for complex architectural decisions, debugging hard problems, or planning. Use when this capability is needed. - Skill: `tomevault-io/deep-analysis-4` (Agent Skill, multi-file: 2 files) - Install (CLI): `npx skillmds@latest add tomevault-io/deep-analysis-4` - Raw SKILL.md: https://api.skillmd.com/api/skills/tomevault-io/deep-analysis-4/raw - Safety review: pending - Works with: Claude Code, Claude.ai, OpenAI Codex - Category: Coding & Dev Tools - Author: tomevault-io (https://skillmd.com/u/tomevault-io) - Updated: 2026-09-17 - Page: https://skillmd.com/skills/tomevault-io/deep-analysis-4 --- # Deep Analysis Skill This skill grants access to the `sequentialthinking` tool. Use this when you need to "break down" a problem before acting. ## When to use - Debugging a complex race condition or "impossible" bug. - Planning a large-scale refactor. - Analyzing security implications of a change. - When the user asks "What do you think?" or "Analyze this". ## Available Tools (Context Loaded) - `mcp_sequential-thinking_sequentialthinking`: A tool that allows you to have an internal monologue/thought process. You can update your hypothesis, revise thoughts, and branch your thinking. ## Best Practices 1. **Don't rush**: Use multiple thought steps (`totalThoughts` > 5) for hard problems. 2. **Revise**: If a thought turns out to be wrong, use the `isRevision` flag to correct yourself. 3. **Hypothesis**: Always state a working hypothesis early in the thought chain. ## Example Workflow 1. User: "Why is the auth service crashing?" 2. Agent: Calls `sequentialthinking` with `thought="Initial hypothesis: DB connection pool exhaustion..."`. 3. Agent: Calls `sequentialthinking` with `thought="Checking logs..."` and `needsMoreThoughts=true`. 4. ... (After 5-10 thoughts) ... 5. Agent: "The issue is a deadlock in the transaction manager..." --- > Converted and distributed by [TomeVault](https://tomevault.io/claim/verridian-ai) — claim your Tome and manage your conversions.