Legibility Framework
Strategic framework developed by sarah-guo for categorizing AI companies and understanding competitive positioning based on the "legibility" or trainability of different business functions. Core concept distinguishing between agent-labs and model-labs based on what can be systematically trained versus what requires human judgment and domain expertise.
Core Concept
The framework centers on identifying which business functions and capabilities are "trainable" (can be systematically learned and benchmarked) versus "untrainable" (require human judgment, domain expertise, and contextual understanding). This distinction drives different competitive strategies and moats.
Framework Categories
Trainable Territory
- Foundation model capabilities
- Standardized benchmarks and evaluations
- Generic AI functionalities
- Reproducible technical performance
- Scalable computation
Untrainable Territory
- Domain-specific integration work
- Customer relationship management
- Private reality arrangement and translation
- Intent identification and prioritization
- Contextual judgment calls
- Maintenance and ongoing adaptation
Strategic Implications
Agent Labs Positioning
Companies operating in "untrainable" territory focus on:
- Integration work: "Arranging a company's private reality so a model can act on it"
- Tool provision: "Handing the model the tools to act"
- Workforce transformation: "Working with the customer to change the reality of its workforce"
- Domain specialization: Deep expertise in specific verticals
- Ongoing relationships: "Integration and maintenance run as long as the relationship does"
Model Labs Positioning
Companies in "trainable" territory focus on:
- Foundation model development
- Benchmark optimization
- Scalable capabilities
- Generic AI advancement
- Research and development
Intent Scarcity Concept
Key insight from the framework: Intent scarcity may be a more limiting factor than compute power. As Guo notes: "Even harder is offense, choosing what to build in the first place... The model is no help there. It will do whatever you point it at and can't tell you what's worth pointing it at, and you can't benchmark that, so you can't train it."
This suggests that knowing what problems to solve becomes the ultimate scarce resource, not the ability to solve known problems.
Competitive Dynamics
Defensibility Patterns
- Agent Labs: Build moats through customer relationships, domain expertise, and integration complexity
- Model Labs: Build moats through computational scale, research capabilities, and technical advancement
Market Evolution
The framework explains why "incumbents don't take everything: they keep the ground they have, and the next thing comes from someone who finds a use before the rest of us."
Practical Applications
Company Assessment
Framework helps evaluate AI companies by asking:
- Which territory do they primarily operate in?
- What type of work creates their competitive advantage?
- How defensible is their position over time?
- Where do they create unique value?
Investment Strategy
Particularly relevant for understanding:
- Different risk/reward profiles between Agent and Model Labs
- Timeline to defensible market positions
- Capital requirements and scaling patterns
- Market opportunity assessment
See also
- agent-labs
- model-labs
- sarah-guo
- intent-scarcity
- untrainable-tasks