Essay · 2026
The Substrate Map
A free one-page taxonomy and 10-minute exercise for finding the substrate-vs-canopy ratio in your last 90 days of work.
Most teams can tell you what they shipped.
Fewer can tell you what will still matter after the next large change.
That is the gap the Substrate Map is built for.
It is a free one-page taxonomy for separating canopy from substrate in your own work. The canopy is the visible layer: prompts, model choices, demo polish, current benchmark scores, frameworks, UI surfaces, launch artefacts. The substrate is the part that keeps doing work when the surface gets repriced: data-quality discipline, eval contracts, workflow integration, trust packaging, domain-specific failure memory, and the proprietary signal the next model release does not have.
The tool gives you a 10-minute exercise:
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Open the last 90 days of engineering tickets, product launches, roadmap decisions, or investment decisions.
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Tag each item as substrate or canopy.
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Compute the ratio.
The number is blunt on purpose.
If the last 90 days were mostly canopy, the next release can reset most of what you built. If the split is 50/50, you are probably normal but not especially durable. If the work is mostly substrate, protect it. That is the work compounding underneath the visible output.
The most useful part is the boundary rule:
If your team cannot agree which column an item belongs in, tag it as canopy.
Disagreement at the boundary means the substrate work has not been made explicit yet.
That makes the map useful before a planning meeting. Instead of arguing about whether a roadmap “feels strategic”, you can ask which work would still matter if the model, market, channel, or buyer changed. The conversation gets harder to fake because each item has to be placed in a column.
The PDF is deliberately simple: one map, one exercise, one ratio. It is not a strategy deck. It is the first instrument you run when the team is shipping a lot but cannot say what is compounding.
Use it on a roadmap. Use it on a product backlog. Use it on a portfolio. Use it before a planning cycle where everyone is about to argue from vibes.
Download.
The Substrate Map
105KB ∙ PDF file
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The Substrate Map is a companion to The Forest Floor Is the Product, the essay that develops the substrate-vs-canopy lens across ecosystems, software, knowledge work, and capital allocation.
What percentage of your last 90 days was substrate?
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