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2025-11-27
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blog/lifelab/what is lifelab
11:47 AM
High-Level Overview
LifeLab is a "quantified self? computational
notebook platform. Think of it as a hybrid
between Jupyter Notebooks (for Python code
execution) and Obsidian/Notion (for structured
note-taking and journaling).
Key Architecture:
Monorepo: Contains all services in one
repository.
Backend: Written in Rust (Axum), handling
API requests, database interactions, and
hook logic.
Database: PostgreSQL stores pages,
blocks, and schemas.
Kernel: A Python service that actually
executes the code blocks found in your
notebooks.
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2 Python
def get_journal blocks(nb):
all blocks = nb.query_all(block_type='markdown', metadata={"source": "dayone"})
d??one_bocks  []
for i, block in enumerate(all blocks):
if metadatanot in block:
continue
if block metadata" is None:
continue
if blockI"metadata"]get("source" " "dayone";
=
dayone blocks.append(block)
return dayone_blocks
print('starting
blocks = get journal blocks(nb)
print("getting blocks", len(blocks))
starting
getting blocks 2719

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LifeLab IS a "quantified self" computational notebook platform. Think of it as a hybrid between Jupyter Image
(for Python code execution) and Obsidian/Notion (for structured note-taking and journaling).
Key Architecture:
Monorepo: Contains all services in one repository.
Backend: Written in Rust (Axum), handling APl requests, database interactions.and hook logic.
Database: PostgreSOL stores pages, blocks, and schemas
Kernel: A Python service that actually executes the code blocks found in your notebooks
Frontends:
Neb: A React application (modern UI).
TUI: A Rust Terminal Ul (for keyboard-driven/SSH usage)
Ielegram: A bot for capturing mobile data on the go
MCP. Connect it to Claude. Don't have to pay me any money use your own subscription
Code Map & Directory Breakdown
Backend (/backend)
The core loaic of the application. It connects the Ul to the Database and the Python Kernel.
src/main.rs: Entry point. Starts the server and initializes the database nool
src/routes.rs (Crucial): Contains all REST APl endpoints (GET /pages, POST /ingest, etc.). Modify here to ado
new API features
src/db.rs: Handles raw SOL queries to PostgreSQL.
src/models.rs: Rust structs representing Database tables (e.g., Block, Page). Modify here if you change the
database schema.
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