Documentation index

Single-doc deep dives for each project and for shared algorithms: technical concept, lessons, and when to use. Linked from the main README.

API projects

Doc	Project	Detail / lessons
pagination	pagination	Page vs offset; OFFSET cost; consistency; UI vs API.
rate-limiter	rate-limiter	Token bucket, sliding/fixed window; storage; headers.
caching	caching	LRU/LFU/TTL; write-through vs write-behind; multi-level; hit rate.
security	security	Five auth methods; RBAC; HTTPS; JWT revocation; password hashing.
validation	validation	Schema + pipelines + batch; boundary validation; structured errors.
websocket	websocket	Raw WS vs Socket.IO; reconnect; rate limit; WSS.
autocomplete	autocomplete	Fuzzy search; debounce; cache; data sources; scale.
search-algorithms	search-algorithms	Exact, fuzzy, phonetic, n-gram, BM25; index; language.
concurrency-parallel	concurrency-parallel	I/O vs CPU; limited concurrency; worker pool.
dependency-injection	dependency-injection	Singleton/scoped/transient; testing; circular deps.
api-scenarios	api-scenarios	Full API reference: CRUD, streaming, bulk, auth, OpenAPI.
—	nextjs-backend	Next.js API routes, Prisma, DI, CRUD; see project README.

Algorithms (src/algorithms)

Doc	Source	Detail / lessons
big-o	big-o.ts	O(1)–O(2^n) demos; benchmark harness; when to use.
ranking-algorithms	ranking-algorithms.ts	TF-IDF, BM25, cosine; custom/phrase/field-weighted; when to use, examples.
sorting-algorithms	sorting-algorithms.ts	Bubble, insertion, selection, merge, quick, heap; complexity; when to use.
sorting-data-generator	generate-sorting-data.js	Seeded test data for sorting correctness and perf tests.

Interview prep

Doc	Description
Interview talking points	FAQ-style answers: when to use which pattern (pagination, rate limit, cache, auth, etc.).

Reviews / supplementary

Doc	Description
TypeScript advanced types review	Review of src/ for generics, utility types, type guards, and type safety.