[Phase 1] Implement in-memory LinkStore backend (JavaScript)

[konard]

Summary

Implement the in-memory storage backend for JavaScript/TypeScript that implements the LinkStore interface from issue #7.

Features

• O(1) lookups by ID using JavaScript Map
• Link deduplication - identical source/target pairs share the same ID
• Pattern matching with wildcard queries via Any symbol
• Async API for consistency with other backends
• Universal links support with additional values
• AsyncIterable iteration over matching links
• Clear method to reset the store

Implementation Details

File	Description
src/backends/memory.js	Main MemoryLinkStore class implementation
src/backends/memory.d.ts	TypeScript type definitions
src/index.js, src/index.d.ts	Export from main package entry point
tests/memory.test.js	105 comprehensive unit tests
tests/memory.benchmark.js	Performance validation benchmarks

API Example

import { MemoryLinkStore, Any } from 'links-queue-js';

const store = new MemoryLinkStore();

// Create a link
const link = await store.create('hello', 'world');
console.log(link); // { id: 1, source: 'hello', target: 'world' }

// Find links
const results = await store.find({ source: 'hello', target: Any });

// Deduplication - returns existing link
const duplicate = await store.create('hello', 'world');
console.log(duplicate.id === link.id); // true

Performance Benchmarks

Operation	Throughput
get by ID	> 8M ops/sec
exists check	> 10M ops/sec
count (all links)	> 7M ops/sec
create (new)	> 1M ops/sec
create (deduplicated)	> 1.6M ops/sec
update	> 898K ops/sec
find (pattern)	> 27K ops/sec
iterate (first 100)	> 97K ops/sec

Test Coverage

105 tests covering:

• Constructor and initialization
• Create operations (basic, with values, deduplication)
• Get operations
• Exists checks
• Find with pattern matching (source, target, id, Any wildcard)
• Count operations
• Update operations (including error handling)
• Delete operations (single and matching)
• Iterate operations
• Clear operations
• Edge cases (empty strings, zero, negative numbers, bigints, nested links, concurrent operations)

Dependencies

• [Phase 1] Define Link and LinkStore interfaces/traits (API Contract) #7 - Link and LinkStore interfaces (merged)

Closes

Fixes #8

---

🤖 Generated with Claude Code

[konard]

⚠️ Solution Draft Finished with Errors

This log file contains the complete execution trace of the AI solution draft process.

💰 Cost estimation:

• Public pricing estimate: $7.355044 USD
• Calculated by Anthropic: $0.000000 USD
• Difference: $-7.355044 (-100.00%)

Note: The session encountered errors during execution, but some work may have been completed. Please review the changes carefully.

📎 Log file uploaded as Gist (960KB)
🔗 View complete solution draft log

Now working session is ended, feel free to review and add any feedback on the solution draft.