# Research Notes > Documentation site powered by Tome - [MongoDB Internals: Storage and Query Processing](/deep-dives/db/mongodb/01-internals-storage-and-query-processing) - [MongoDB Query Optimizer](/deep-dives/db/mongodb/02-query-optimizer) - [MongoDB Performance Tuning: Slow Queries, `explain()`, and Fixes](/deep-dives/db/mongodb/03-performance-tuning) - [Commonly Used MongoDB Index Types](/deep-dives/db/mongodb/04-common-index-types) - [MongoDB Quirks and Overlooked Details](/deep-dives/db/mongodb/05-quirks-and-overlooked-details) - [Express.js Deep Guide](/deep-dives/js-land/backend/expressjs) - [Node.js Deep Guide](/deep-dives/js-land/backend/nodejs) - [React Performance Optimization in Depth](/deep-dives/js-land/frontend/react-performance-optimization) - [React Quirks and Overlooked Details](/deep-dives/js-land/frontend/react-quirks-overlooked-details) - [SPA Routing in React in Depth](/deep-dives/js-land/frontend/react-spa-routing) - [React State Management in Depth](/deep-dives/js-land/frontend/react-state-management) - [ANSI Escape Sequences Deep Guide](/deep-dives/terminal/ansi-sequences/ansi-escape-sequences) - [Building Terminal UI Apps Deep Guide](/deep-dives/terminal/building-terminal-ui-apps/building-terminal-ui-apps) - [PTY, TTY, stdin, stdout, and stderr Deep Guide](/deep-dives/terminal/pty-tty-stdin-stdout/pty-tty-stdin-stdout) - [terminfo and TERM Deep Guide](/deep-dives/terminal/terminfo-and-term/terminfo-and-term) - [tmux Deep Guide](/deep-dives/terminal/tmux/tmux) - [Phase 1 Plan Review](/project/email-agent/phase1/phase1-plan-review) - [Gmail Phase 1 Plan](/project/email-agent/phase1/phase1-plan) - [AI Tag Suggestions: Inference Guide For HT Studio](/project/ht-studio/ai-suggestions/plan) - [Learnings from Bulk Tagging feature](/project/ht-studio/bulk-tagging/learnings) - [Bulk Tagging Implementation Plan](/project/ht-studio/bulk-tagging/plan) - [HT Studio Architecture Refactor Plan](/project/ht-studio/refactor/v3) - [Usage Tracker Background Rollup Plan](/project/opencode-stats/plan/reduce-read-amp) - [Usage Tracker V2 Review Guide](/project/opencode-stats/plan/v2-review-guide) - [Research Repo Migration Plan For Local Tome Fork](/project/tome/migrate-to-local-tome/research-side) - [Tome Fork Integration Plan](/project/tome/migrate-to-local-tome/tome-side) - [Tome Monorepo: New Developer Onboarding](/project/tome/onboarding) - [Local Git Diff Tool Implementation Plan](/project/yetanothergitdiffcli/plan)