COLLIN
NERDAHL
Most people writing about AI
have a thesis
and no receipts.
I run mine against
my own capital,
my family's decisions,
my own ventures,
and keep what survives.
I'm writing the thinking on
LLMs as a medium,
not a just a tool.
I'm publishing at:
The most dangerous hidden rule
is the belief that you have none.
RECEIPTS
Where these ideas have had to survive contact with real stakes:
TRADING:
systematically since 2017, across equities, options, and crypto.
Top 1% of 60,000 traders in a verified TradingView competition. No blown accounts.
(The engine behind it is at PrimeFoldTrading.)
REAL ESTATE:
operating since 2008 with my wife Priscilla.
A multi-million-
dollar portfolio
and a growing managed book.
Zero evictions,
zero tribunal hearings to date.
MANUFACTURING:
15 years on the floor (2009–2024),
a key member of the leadership
team that tripled company revenue. Lean and Kaizen in my hands daily.
AI INFRASTRUCTURE:
a custom
memory server,
an open-source-friendly skill library,
and production agents
I run daily.
The methodology is public on GitHub;
the system isn't.
THE DOCTRINE
LLMs are a new medium with their own grammar. Most of us are writing prose
in a medium that wants something else.
Three things I'm working out in public:
The Medium Thesis.
A medium, not a tool.
Threads Are Spaces.
You shape a context
like a room
you don't talk into it.
The Personal AI OS.
Run your work,
your capital,and your decisions
on one system.
The essays
are the public layer.
Underneath them,
a growing body
of frameworks,
experiments,
and field notes.I publish them
as they're done, at
Hidden Heuristics.
HOW I WORK
Proof before promises. I validate with real stakes before I ship.
Infrastructure over features. Foundations compound. Features decay.
Constraint-driven design. I build for the failure modes.
Continuous improvement. Manufacturing discipline on everything.
The work I trust most has been tested against real stakes: my own capital,
my own decisions.
WHERE THE WORK LIVES
The operator hub.
Everything I build or ship routes through here.
Trading The research lab:
validated strategies
and navigation intelligence.
Hidden Heuristics Essays on cognition, compression, and the medium.
The PrimeFold Press Field notes from the validation engine.
RENU Managed property, managed relationships. 18 years, zero evictions.
WRITING
The
PrimeFold Press
What survived
validation this week.Reports from the validation enginethe tests, failures, survivors,and lessons worth carrying forward.
Hidden
Heuristics
is a publication
about the
compressed rules
running
cognition,
culture,
capital,
and
everyday decisions.
WORK WITH ME
I'm reachable,
and I'd rather hear a real idea than miss it.
If there's something
worth exploring,
reach out
I'll take the conversation.
Frontier labs
AI collaborators
yes, let's talk.
Investors, partners,Tell me what
you're thinking.A build or a problem
worth solving,
tell me the decision
where mistakes
are expensive,
and we'll see if I can help.Just want the thinking
join
Hidden Heuristics.
CONTACT
FOUNDER OF
PRIMEFOLD TOOLS
tools that think
systems that scale
decisions that compound
Where knowledge becomes tools
Trading systems, AI tools, and field notes
PrimeFold Tools are
AI tools forged in real decisions.
Each one started as a real workflow,
a recurring problem,
or a decision process
inside an operating business,
not a feature looking for a use.
Skills and Custom GPTs,
prompt systems, and decision tools,
built to save time, increase signal,
and sharpen decisions.
If a tool made it to this page,
it passed the only test that matters:
it's still being used.
Find what survives contact with reality.
PARTNER OF
RENU PROPERTY PARTNERS
RENU Property Partners
is Priscilla and Collin Nerdahl a Sarnia family that's invested in real estate since 2008:
rent-to-own, conversions,
house hacking, infill, flips,
and rentals of our own.Priscilla runs the part that matters most day to day,
finding good tenants and keeping good relationships.Across every tenant we've placed, we've never had an eviction or a Landlord and Tenant Board dispute.We also partner with investors and find off-market deals. We've paid out and recycled investor capital, and we structure deals with private and bank financing. If you've got capital looking for a careful operator, let's talk.
PRIMEFOLD TRADING
PrimeFold Trading
is a systematic trading research lab
built on one rule:
REALITY GETS THE FINAL VOTE
The research lab that runs the process backwards.
Most trading research starts with a strategy and hunts for evidence to justify it, this starts with the evidence
and keeps only what survives.
More than 5 million backtests across
3,000+ assets and 7 timeframes
have narrowed the field to 80-plus validated strategies
across 13 edge families,
What comes out:
Regime-aware TradingView indicators,
Systematic and quantitative trading research,
and a repeatable way to tell durable edges
from attractive stories.
THE PRIMEFOLD PRESS
The PrimeFold Press
is a weekly trading newsletter
for systematic traders
and prop-firm operators.
it publishes:
field notes from the validation engine
the strategies that failed, the ones that survived,
and the lessons worth carrying forward.
No hype, no signals for sale:just what survived contact
with the market that week.
Every Sunday:
A running record of systematic trading research in motion,
for systematic traders, quants, and prop-firm operators.
It trades prediction for evidence gathered in real market contact.
Fewer hot takes, more receipts.Free, weekly.
HIDDEN HEURISTICS
Hidden Heuristics
is a field-notes publication about:
the compressed rules running
cognition, culture, capital,
and everyday decisions.
A heuristic is not a shortcut.
It is a theory of the world compressed into an action,
and most run invisibly
until reality exposes whether they still hold,
and tests whether it still matches the world.
Each essay names one:a belief, a habit, a ritual, an institution, a mental model,and tests whether it still matches the world.
For people who run something real (capital, code, organizations, craft) and think structurally about the rules underneath. Part decision-making, part sense-making, part field guide to the heuristics shaping how we think, spend, build, and choose.
CONTACT
COLLIN NERDAHL
Builder → Operator → Architect
18+ years real estate
15 years Lean Manufacturing
9+ years trading systems
3+ years AI system design
Based in Ontario, Canada
© PrimeFold.Tools. All rights reserved.