Add JetStream reference documentation

[lalinsky]

Add comprehensive JetStream reference documentation

This PR adds detailed reference documentation for JetStream implementation:

• Core concepts and architecture overview
• Wire API reference with subjects and JSON schemas
• Stream and consumer configuration specifications
• Key/Value store protocol and operations
• Object store design and chunking mechanisms

Documentation covers protocol details, API specifications, and implementation guidance for JetStream client library development.

Resolves #6

Generated with Claude Code

[claude]

Claude finished @lalinsky's task —— View job

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PR Review: JetStream Reference Documentation

I've completed a comprehensive review of the JetStream reference documentation PR. Here's my detailed feedback:

Todo List:

• Read repository context (CLAUDE.md, README.md)
• Review all 6 documentation files for content quality
• Check documentation accuracy against JetStream specifications
• Assess consistency across files
• Evaluate completeness and usefulness for developers
• Provide comprehensive review feedback

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Overall Assessment: ⭐ Excellent

This is high-quality, comprehensive documentation that will be extremely valuable for JetStream client library implementation. The documentation is well-structured, technically accurate, and provides the right level of detail for developers.

✅ Strengths

📋 Comprehensive Coverage

• All major JetStream components covered: streams, consumers, KV store, object store
• Both basic and advanced features documented
• Clear separation between storage (streams) and consumption (consumers)

🎯 Technical Accuracy

• Wire protocol subjects and formats are correct ($JS.API.*, $KV.*, $OBJ.*)
• JSON schemas and response formats align with NATS JetStream specifications
• Error codes and handling patterns are accurate
• Proper acknowledgment subject patterns documented

📚 Developer-Focused Content

• Practical examples with JSON payloads and bash commands
• Best practices sections in each document
• Clear configuration options with explanations
• Implementation notes and common pitfalls covered

🏗️ Excellent Structure

• Consistent formatting and organization across all files
• Logical flow from overview → API → detailed components
• Good use of code blocks, headers, and bullet points
• Cross-references between related concepts

📋 Detailed Review by File

jetstream-overview.md - Perfect introduction covering architecture, QoS, and key concepts

jetstream-api.md - Excellent wire protocol reference with correct subject patterns and response formats

jetstream-streams.md - Comprehensive stream configuration and operations, good coverage of advanced features like mirroring

jetstream-consumers.md - Thorough coverage of all consumer types with clear distinction between pull/push patterns

jetstream-kv.md - Complete KV store implementation details with proper key constraints and operation patterns

jetstream-objectstore.md - Good coverage of chunking strategy and object operations

🔒 Security Assessment

• No security concerns identified
• Documents standard NATS authentication and authorization patterns
• Includes guidance on account isolation and subject-based permissions
• No sensitive information exposed

⚡ Performance Considerations

• Includes appropriate performance guidance and best practices
• Chunk size recommendations for object store
• Flow control patterns documented
• Resource limit considerations covered

🧪 Test Coverage

• Documentation-only PR, no test coverage issues
• Provides sufficient implementation guidance for writing tests
• Examples could be validated against actual NATS servers

🔧 Minor Suggestions for Future Enhancement

1. jetstream-api.md:46 - Consider adding example of ACK subject parsing/construction
2. jetstream-consumers.md:208 - Could expand on dead letter queue implementation patterns
3. jetstream-kv.md:23 - The key regex could benefit from more examples of invalid keys
4. jetstream-objectstore.md:172 - Chunk subject pattern could show concrete example

🎯 Recommendation

✅ APPROVE - This is excellent documentation that significantly enhances the project's value. No blocking issues identified. The documentation is technically accurate, well-structured, and provides comprehensive guidance for JetStream client library implementation.

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