The software decision engine

Build. Buy.
Bridge. Beware.

Every software category, scored on five dimensions and re-scored daily. Independent and evidence-graded. Built and maintained by an operator and a fleet of AI researchers.

Explore 1,603 categories See the paid plans →

Software decisions for the AI age.

Fig. 01 — The B4 Matrix · auto-cycling · tap to lock SEP 2026
AI feasibility →
Strategic differentiation →
⚒ Build 68 CATEGORIES · 4% OF THE INDEX

Own it. Build means own it. The category differentiates you competitively, and AI makes building it realistic. Build is small because there are a host of considerations and teams should really only build the software that gives them competitive advantages.

SEE THE BUILD CATEGORIES ↗

My build portfolio

Browse all →
FIG — ENTITY GRAPH

Life OS

● LIVE

A cognitive system that reads my life across three contexts and hands the day back already synthesized.

4,141 ENTITIES · 26 MCP TOOLS · 579 TESTS
FIG — MATRIX

B4 Index

● LIVE

The build-vs-buy argument turned into a scored, self-rescoring public index.

1,603 CATEGORIES · 11,031 VENDOR FILES · DAILY

$ route --task extraction
→ tier: mid · gate: fresh-context
✓ done-condition verified

FIG — HARNESS

Claude-ops

● MIT

The operating layer for frontier models: routing, delegation contracts, review gates.

25 SKILLS · 20+ MCP SERVERS · PUBLIC REPO
FIG — SESSIONS

Observatory

● LIVE

Usage intelligence for Claude Code. Every session traced, costed, and separable from test traffic.

OBSERVABILITY · DEV TOOLING
B4
FIG — PIPELINE

Compound Publishing

● ACTIVE BUILD

Autonomous AI book production and publishing pipeline with human approval gates.

CONTENT PIPELINES · ORCHESTRATION
FIG — FRAMES

Video Factory

● LIVE

Prompt-driven video on Remotion. Schema-validated compositions rendered to MP4 from JSON.

CONTENT PIPELINES · DEV TOOLING
0
Categories scored
0
Domains
0
Vendor mappings — and counting
Daily
Self-rescoring cycle

Latest from the desk

All writing →
#B4Framework JUL 8, 2026 · 5 MIN

Everyone Argues Build vs. Buy. For Most Companies the Answer Is Neither.

The build-vs-buy debate is a false binary. A third of all scored software categories land in BRIDGE — buy the platform, own the intelligence layer. Here's the quadrant nobody named, and how to act on it.

READ THE ESSAY ↗
#TheShift SEP 2026 · 4 MIN

Coding Agents Get Production Funding… and Research Says They Aren't Quite Ready.
#TheShift SEP 2026 · 5 MIN

AWS Just Gave Agents a Wallet
#TheShift AUG 2026 · 4 MIN

Your Next AI Bottleneck Is a Substation