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+# Sequential Thinking Agent Skill
+
+Structured, reflective problem-solving methodology converted from the sequential-thinking MCP server into a native Agent Skill.
+
+## Overview
+
+This skill teaches Claude to apply systematic sequential thinking methodology for complex problem-solving, without relying on external MCP tools. It enables:
+- Breaking down complex problems into manageable thought sequences
+- Dynamic adjustment of thought count as understanding evolves
+- Revision of previous thoughts when new insights emerge
+- Branching into alternative reasoning paths
+- Hypothesis generation and verification
+
+## Skill Structure
+
+```
+sequential-thinking/
+├── SKILL.md (105 lines)
+│   Core methodology, when to apply, scripts usage
+│
+├── package.json
+│   Test dependencies (jest)
+│
+├── .env.example
+│   Configuration options
+│
+├── scripts/
+│   ├── process-thought.js (executable)
+│   │   Validate and track thoughts deterministically
+│   │
+│   └── format-thought.js (executable)
+│       Format thoughts for display (box/simple/markdown)
+│
+├── tests/
+│   ├── process-thought.test.js
+│   │   Validation, tracking, history tests
+│   │
+│   └── format-thought.test.js
+│       Formatting tests (all formats)
+│
+└── references/
+    ├── core-patterns.md (95 lines)
+    │   Essential revision & branching patterns
+    │
+    ├── examples-api.md (88 lines)
+    │   API design example walkthrough
+    │
+    ├── examples-debug.md (90 lines)
+    │   Performance debugging example
+    │
+    ├── examples-architecture.md (94 lines)
+    │   Architecture decision example
+    │
+    ├── advanced-techniques.md (76 lines)
+    │   Spiral refinement, hypothesis testing, convergence
+    │
+    └── advanced-strategies.md (79 lines)
+        Uncertainty management, revision cascades, meta-thinking
+```
+
+**Documentation**: 627 lines across 7 files (all under 100 lines)
+**Scripts**: 2 executable Node.js scripts with tests
+
+## Key Features
+
+### Progressive Disclosure Design
+Each file focuses on specific aspects, loaded only when needed:
+- **SKILL.md**: Quick reference with core methodology
+- **core-patterns.md**: Common patterns for everyday use
+- **examples-*.md**: Real-world walkthroughs for learning
+- **advanced-*.md**: Sophisticated techniques for complex scenarios
+
+### Token Efficiency
+- Concise explanations sacrifice grammar for brevity
+- Examples demonstrate patterns without verbose explanation
+- Cross-references between files avoid duplication
+
+### Methodology Conversion
+Extracted from MCP server's approach and converted to instructions:
+- MCP tool provided **interface** for sequential thinking
+- Agent skill provides **methodology** to think sequentially
+- No dependency on external tools—pure instructional approach
+
+## Usage Modes
+
+**Explicit Mode**: Use visible thought markers
+```
+Thought 1/5: [Analysis]
+Thought 2/5: [Further analysis]
+```
+
+**Implicit Mode**: Apply methodology internally without cluttering output
+
+## When Claude Should Use This Skill
+
+Automatically activated for:
+- Complex problem decomposition
+- Adaptive planning with potential revisions
+- Debugging and root cause analysis
+- Architecture and design decisions
+- Problems with unclear or emerging scope
+- Multi-step solutions requiring context
+
+## Scripts Usage
+
+### Process Thought (Validation & Tracking)
+
+```bash
+# Process a thought
+node scripts/process-thought.js --thought "Initial analysis" --number 1 --total 5 --next true
+
+# Process with revision
+node scripts/process-thought.js --thought "Corrected analysis" --number 2 --total 5 --next true --revision 1
+
+# Process with branching
+node scripts/process-thought.js --thought "Branch A" --number 2 --total 5 --next true --branch 1 --branchId "branch-a"
+
+# View history
+node scripts/process-thought.js --history
+
+# Reset history
+node scripts/process-thought.js --reset
+```
+
+### Format Thought (Display)
+
+```bash
+# Box format (default)
+node scripts/format-thought.js --thought "Analysis" --number 1 --total 5
+
+# Simple text format
+node scripts/format-thought.js --thought "Analysis" --number 1 --total 5 --format simple
+
+# Markdown format
+node scripts/format-thought.js --thought "Analysis" --number 1 --total 5 --format markdown
+
+# With revision
+node scripts/format-thought.js --thought "Revised" --number 2 --total 5 --revision 1
+
+# With branch
+node scripts/format-thought.js --thought "Branch" --number 2 --total 5 --branch 1 --branchId "a"
+```
+
+### Running Tests
+
+```bash
+# Install dependencies (first time only)
+npm install
+
+# Run all tests
+npm test
+
+# Run tests in watch mode
+npm run test:watch
+
+# Run with coverage
+npm run test:coverage
+```
+
+## When to Use Scripts
+
+**Use scripts when**:
+- Need deterministic validation of thought structure
+- Want persistent thought history tracking
+- Require formatted output for documentation
+- Building tools that integrate with sequential thinking
+
+**Don't use scripts when**:
+- Applying methodology directly in responses
+- Want lightweight, inline thinking
+- No need for validation or tracking
+
+Scripts are **optional tooling** - the methodology can be applied without them.
+
+## Source
+
+Converted from: https://github.com/modelcontextprotocol/servers/tree/main/src/sequentialthinking
+
+Original MCP server by Anthropic (MIT License).
+Skill conversion:
+- Extracts methodology as instructions
+- Adds executable scripts for deterministic validation
+- Makes tool-independent while preserving functionality