1# Skills Index
2 
3Skills are foundational knowledge modules that inform the design and implementation of agents, tools, and prompts.
4 
5## Available Skills
6 
7### LLM Evaluator
8**Path**: `skills/llm-evaluator/llm-evaluator.md`
9 
10Covers LLM-as-a-Judge evaluation methodology including:
11- Scoring approaches (direct, pairwise, reference-based)
12- Evaluation metrics (classification, correlation)
13- Known biases and mitigation strategies
14- Implementation patterns
15 
16**Key Takeaways**:
17- Use direct scoring for objective evaluations
18- Use pairwise comparison for subjective preferences
19- Always mitigate position bias
20- Prefer classification metrics for interpretability
21 
22### Context Fundamentals
23**Path**: `skills/context-fundamentals/context-fundamentals.md`
24 
25Covers context engineering principles including:
26- Context window management
27- Information hierarchy
28- Context types (static, dynamic, ephemeral)
29- Relevance filtering
30 
31**Key Takeaways**:
32- Structure context by priority
33- Be explicit over implicit
34- Remove redundancy
35- Signal freshness of information
36 
37### Tool Design
38**Path**: `skills/tool-design/tool-design.md`
39 
40Covers agent tool design best practices including:
41- Single responsibility principle
42- Input/output schemas
43- Error handling patterns
44- AI SDK 6 features (approval, strict mode, examples)
45 
46**Key Takeaways**:
47- Clear, validated schemas
48- Predictable output structure
49- Graceful error handling
50- Consider approval for dangerous tools
51 
52## Skill Application Matrix
53 
54| Skill | Agents | Tools | Prompts |
55|-------|--------|-------|---------|
56| LLM Evaluator | Evaluator | directScore, pairwiseCompare | evaluation/* |
57| Context Fundamentals | All | All (context params) | All (context handling) |
58| Tool Design | All (tool selection) | All | orchestrator-prompt |
59 
60## Adding New Skills
61 
621. Create skill directory: `skills/<skill-name>/`
632. Create main file: `skills/<skill-name>/<skill-name>.md`
643. Include:
65   - Overview and purpose
66   - Core principles
67   - Practical patterns
68   - Implementation examples
69   - References
704. Update this index
71 
72## Skill Development Guidelines
73 
74- Focus on principles that transfer across implementations
75- Include concrete examples and patterns
76- Reference authoritative sources
77- Keep content actionable, not just theoretical
78- Update as understanding evolves
79 
80