AttestOS
Bot checks your visitors never see.
An invisible proof-of-work check with a server-side verify call, in place of CAPTCHA puzzles.
Open AttestOS →Harare, Zimbabwe · since 2026
Six businesses,
one operator,
and a written record of both.
Jacaranda Labs builds small, constraint-native software ventures and funds the research that studies them — including the ones that did not work. This site is the lab, the person and the publications in one place.
01 · The work
Publications
20 works: 5 books, 4 working papers and reports, and the published editions behind them.
Browse the catalogue → 02 · The personCourage Garikai
The operator and writer behind the lab: fifteen years of techno-preneurship, including the published failures.
Read the portfolio → 03 · The rulesHow this is run
One owner, six ventures, agents that do the work — and the disclosure that follows from all three.
About and disclosure →The ventures
What the lab runs
Each is its own GitHub account, its own Cloudflare account and its own Whop business. A key that leaks or a quota that runs out takes down one venture, not the set.
TightBucket
Website leak audits.
Twenty-second audits that show where a website loses revenue, with the evidence and the fix, for stores, SaaS, sales teams and agencies.
Open TightBucket →DeskOS
Working desks for customs, safari and tender firms.
Web desks with working calculators for customs and freight, safari and DMC, and tender and donor ESG firms, with daily open notices for tender firms from 13 public sources (World Bank, UN agencies, EU TED and national portals), by region.
Open DeskOS →STPi
Strategic Talent Placement Infrastructure.
Hunts public job ads across African markets, drafts a cover letter and tailored CV for each, and waits for a person to approve before anything is sent.
Open STPi →Tapstall
A shop link for the markets the big platforms skip.
A storefront link for informal and social-commerce shops that understands EcoCash, InnBucks and PayShap and matches exact payment amounts.
Open Tapstall →Open Practice
Practical AI, learned by doing.
A learning platform where people practise with AI tools on real tasks, using their own free API keys, and keep what they make.
Open Open Practice →The research
Every venture is also a case study
The think tank funds books and working papers that study these ventures at close range: the audit logs, the commit history, the usage meters. The same owner commissions both, and each work says so.
book
Emotional Engineering for AI-Oriented Infrastructure Operators
Trust, agency and ethical adoption in systems that act
Read about it → bookThe Tight Bucket
Designing constraint-native digital businesses
Read about it → bookProof of Mechanism
How leaders who build with AI agents tell a working product from a convincing demo
Read about it → bookNobody Was Watching
How founders run autonomous growth systems without harming strangers, their brand or themselves
Read about it → bookFlower and Bees
The Jacaranda voice guide: how every page, product and message should feel
Read about it → paperConstraint-Native Business Model Design
Quota-bounded autonomy, proof-first acquisition and verification debt in a zero-cash, AI-built venture
Read about it →