Circle 6 Systems Product

SDLC Journal

Encrypted, privacy-first development journaling. Capture your daily work through a structured framework designed for software professionals, with zero-knowledge architecture that keeps your reflections truly private.

Open Source

The Framework

Success, Delight, Learning, Compliment

Four prompts that guide meaningful daily reflection. Each entry captures a different dimension of your development experience.

Success

What went well today? Record accomplishments, completed tasks, and milestones reached.

Delight

What surprised or pleased you? Capture moments of joy, elegant solutions, and positive interactions.

Learning

What did you learn? Document new knowledge, insights from debugging, and patterns discovered.

Compliment

Who helped you or did great work? Acknowledge teammates, mentors, and contributors.

Capabilities

Built for Privacy

Every architectural decision prioritizes your privacy. Your journal entries are encrypted before they leave the input field.

AES-256-GCM Encryption

Military-grade client-side encryption. Your passphrase derives the key locally using PBKDF2. Ciphertext is the only thing that ever touches storage.

Zero-Knowledge Architecture

The server never sees your plaintext entries. No encryption keys are transmitted. Even the application developer cannot read your journal.

IndexedDB Local Storage

All data stays on your device in the browser's IndexedDB. No cloud sync, no remote databases, no data leaving your machine without your explicit action.

Web and Desktop

Use SDLC Journal in any modern browser or install the Electron desktop app for a native experience. Same encryption, same privacy, your choice of platform.

No Tracking or Analytics

Zero telemetry. No cookies. No analytics scripts. No tracking pixels. The application makes no external network requests beyond what you explicitly initiate.

Export Your Data

Your data belongs to you. Export your decrypted journal entries at any time. No lock-in, no proprietary formats, no barriers to leaving.

Our Privacy Commitment

SDLC Journal was built because we believe developers deserve a reflection tool that respects their privacy unconditionally. Here is what that means in practice:

Encryption happens in your browser before data is stored -- the app never has access to plaintext
No accounts required -- no email, no sign-up, no identity information collected
No network requests to external services -- the app works entirely offline after initial load
Open source code you can audit yourself to verify every claim on this page
No monetization through data -- your journal entries have zero commercial value to us