Create database design module

[TaiChi112]

Summary

• Added Database Design Module v1.
• Wrote schema design, reliability, and performance pages.
• Connected database design concepts to practical software engineering and the project’s PostgreSQL/Prisma direction.

Validation

• \git diff --check\ passed.
• \�un run build\ passed.

Notes

• This PR updates documentation only.
• This PR does not modify runtime code or dependencies.
• This PR keeps the database docs at v1 overview depth without adding full implementation labs yet.

Summary by CodeRabbit

• Documentation
  • Expanded Database Performance guide with core concepts including indexes, query optimization, and pagination strategies.
  • Expanded Database Reliability guide covering ACID properties, data integrity, and backup fundamentals.
  • Expanded Schema Design guide with practical modeling principles and design best practices.

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Project	Deployment	Actions	Updated (UTC)
personal-profile-prototype	Ready	Preview, Comment	Jun 3, 2026 7:19pm

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: 85179993-40b4-423f-a07c-29b19e1a384c

📥 Commits

Reviewing files that changed from the base of the PR and between 8fa9af8 and 970bdfd.

📒 Files selected for processing (3)

• docs/(computer_science)/systems/db/performance/index.mdx
• docs/(computer_science)/systems/db/reliability/index.mdx
• docs/(computer_science)/systems/db/schema-design/index.mdx

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📝 Walkthrough

Walkthrough

Three database documentation pages—schema design, reliability, and performance—were expanded from placeholder content into comprehensive guides, each covering foundational concepts, practical patterns, and interconnected next steps to form a structured learning path.

Changes

Database Fundamentals Documentation

Layer / File(s)	Summary
Schema Design Foundation docs/(computer_science)/systems/db/schema-design/index.mdx	Page description updated from placeholder to practical data-modeling statement. "Work in Progress" callout revised to reflect foundational module status. Body restructured with core concepts (entities, relationships, keys, constraints), normalization guidance, importance rationale (maintainability, correctness, performance), and project connection to Prisma and PostgreSQL. Next-step link to Reliability added.
Database Reliability Principles docs/(computer_science)/systems/db/reliability/index.mdx	Placeholder Reliability page replaced with comprehensive guide. Frontmatter updated with Database Reliability title and description. Body expanded with "What is Reliability?" introduction, "Core Reliability Tools" covering ACID, constraints/data integrity, and backups/migrations, plus "Failure Thinking" section. Work in Progress callout retained. Performance link added as next step.
Database Performance Optimization docs/(computer_science)/systems/db/performance/index.mdx	Performance page frontmatter updated from generic placeholder to Database Performance with new description. Body expanded from minimal content to comprehensive guide with why performance matters, core concepts (indexes, query shape, N+1 queries, pagination), "Measure Before Optimizing" golden rule checklist, and outbound next-step link to Agentic Applications.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~8 minutes

Possibly related PRs

• TaiChi112/Personal-Profile-Prototype#8: Follows up on placeholder database documentation pages introduced in this PR by fleshing out performance, reliability, and schema-design content.

Poem

🐰 Three docs were sparse, mere skeletons bare,
Now schema, reliability, and performance shine fair!
From keys to constraints, from ACID to speed,
A garden of database wisdom we'll seed.
Foundations laid down, each page linked with care,
A learner's true path through databases rare!

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title 'Create database design module' directly matches the PR's primary objective of introducing a new Database Design Module with pages on schema design, reliability, and performance.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch docs/db-design-module

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[Copilot]

Pull request overview

Adds v1 “Database Design” documentation content to taichi112.works’s computer science/systems database section, expanding previously placeholder pages into introductory, project-relevant guidance aligned with a PostgreSQL/Prisma direction.

Changes:

• Expands the Schema Design page with core modeling concepts, normalization, and a project tie-in to Prisma/PostgreSQL.
• Introduces a Database Reliability page covering integrity concepts (ACID, constraints), backups/migrations, and failure-oriented thinking.
• Introduces a Database Performance page covering indexes, N+1 queries, pagination, and “measure before optimizing”.

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated no comments.

File	Description
docs/(computer_science)/systems/db/schema-design/index.mdx	Replaces placeholder content with a schema design primer and links forward to reliability.
docs/(computer_science)/systems/db/reliability/index.mdx	Replaces placeholder content with a reliability overview and links forward to performance.
docs/(computer_science)/systems/db/performance/index.mdx	Replaces placeholder content with performance fundamentals and links forward to agentic applications.