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Thesius Code

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Developer Second Brain

Developer Second Brain

A Notion-based knowledge management system designed for developers. Capture code snippets, bookmark resources, log "Today I Learned" entries, organize technical notes, and build a searchable personal wiki that compounds over time.

Key Features

  • Code snippet library with syntax-highlighted blocks and language tagging
  • TIL (Today I Learned) journal for daily micro-learnings
  • Resource bookmarks with automatic categorization and ratings
  • Technical notes organized by topic with bi-directional linking
  • Reading list for books, articles, papers, and documentation
  • Spaced repetition prompts — formula-driven review reminders for retention
  • Weekly knowledge digest — auto-generated view of what you learned this week

Database Schema

Code Snippets

Property Type Description
Snippet Name Title Descriptive name (e.g., "Python retry decorator with backoff")
Language Select Python · JavaScript · TypeScript · Go · Rust · SQL · Bash · YAML
Category Multi-select Algorithm · Pattern · Utility · Config · Query · One-liner · Boilerplate
Use Case Text When you'd reach for this snippet
Source URL Where you found or learned it
Created Created time Auto-populated
Last Used Date When you last copied this snippet into a project
Times Used Number Track how often you reach for it
Tags Multi-select Free-form tags for cross-cutting concerns

TIL Journal

Property Type Description
TIL Title Title One-line summary of what you learned
Date Date When you learned it
Category Select Language · Framework · Tool · Concept · Debug · Performance · Security
Source URL Article, docs, or video where you learned it
Confidence Select Just Learned · Practiced · Can Teach
Next Review Formula Spaced repetition: Date + confidence-based interval
Related Snippets Relation → Code Snippets Linked code examples
Key Takeaway Text (long) The core insight in your own words

Resource Bookmarks

Property Type Description
Resource Title Title Name of the resource
URL URL Link to the resource
Type Select Article · Documentation · Video · Course · Tool · Repo · Paper
Topic Multi-select Backend · Frontend · DevOps · Data · Security · Architecture
Rating Select Must Read · Valuable · Decent · Skimmable
Status Select To Read · Reading · Completed · Archived
Date Added Created time Auto-populated
Notes Text (long) Your summary and key takeaways

Technical Notes

Property Type Description
Note Title Title Topic name
Domain Multi-select Architecture · Databases · Networking · OS · Distributed Systems · Security
Type Select Concept · How-To · Comparison · Troubleshooting · Reference
Related Notes Relation → Technical Notes Bi-directional links to related topics
Related Snippets Relation → Code Snippets Supporting code examples
Last Updated Last edited time Auto-populated
Maturity Select Seed · Growing · Evergreen

Quick Start

  1. Duplicate the template into your Notion workspace
  2. Start with TIL entries — log one thing you learned today
  3. Add 3-5 code snippets you frequently search for or copy-paste
  4. Bookmark 5 resources you've found valuable recently
  5. Set a daily habit — spend 5 minutes at end-of-day logging what you learned

Usage Guide

The Daily Capture Workflow

Morning: Check "Next Review" items (spaced repetition reminders)
During work: Capture snippets and bookmarks as you encounter them
End of day: Write 1 TIL entry summarizing the most interesting thing you learned
Weekly: Review your knowledge digest, upgrade Confidence levels, prune stale bookmarks
Enter fullscreen mode Exit fullscreen mode

Knowledge Maturity Model

Level Description Action
Seed Just captured, raw notes Revisit within 3 days
Growing Refined with examples and connections Link to related notes
Evergreen Polished, well-connected, reliably useful Share with team or publish

Recommended Views

View Type Filter / Sort Use Case
Review Queue Table Next Review ≤ today Daily spaced repetition
Recent TILs Gallery Last 7 days Weekly knowledge digest
Snippet Search Table All, sorted by Times Used Find reusable code fast
Unread Bookmarks Table Status = To Read Weekend reading list
Knowledge Map Board Group by Domain Visual topic overview

Template Examples

Example: Code Snippet

Field Value
Snippet Name Python context manager for database transactions
Language Python
Category Pattern, Utility
Use Case Wrap DB operations in automatic commit/rollback
Times Used 12

Example: TIL Entry

Field Value
TIL Title PostgreSQL partial indexes can reduce index size by 80%
Category Concept
Confidence Practiced
Key Takeaway CREATE INDEX ... WHERE active = true — only indexes rows matching the predicate. Huge savings on tables with many inactive rows.

Customization Tips

  • Add a "Project" relation to link snippets and notes to specific projects you're working on
  • Create a "Flashcard" view showing only TILs with Confidence = "Just Learned" for study sessions
  • Add an "Interview Prep" checkbox to flag snippets and concepts useful for technical interviews
  • Build a "Most Used Snippets" view sorted by Times Used descending for your personal greatest hits
  • Add a "Shared With Team" checkbox to track which knowledge you've already propagated

This is 1 of 11 resources in the Notion Developer Pro toolkit. Get the complete [Developer Second Brain] with all files, templates, and documentation for $29.

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Or grab the entire Notion Developer Pro bundle (11 products) for $99 — save 30%.

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