Preuve de construction
Des produits réels. Des décisions visibles.
Ces pages documentent des produits que Danilson construit ou exploite. Les statuts reprennent les fiches publiques canoniques. Les métriques commerciales et données des membres ne sont pas publiées ici.
Projets
Chaque fiche est liée à un produit documenté.
Statut
État déclaré dans le roster public du projet.
Apprentissages
10 notes vérifiées reliées aux projets.
- BUILD 01En production
Atamatax
US expat tax infrastructure
Americans abroad carry fragmented US obligations — FBAR, PFIC rules, Form 8621, catch-up procedures — hidden inside ordinary foreign accounts and funds; the market offers a specialist at several thousand dollars, or nothing.
Point de décision
Making uncertainty honest: every classification carries its source, a confidence level and the assumption still to confirm — and never reads as a legal determination.
- Système
- Tax situation engine · document workflow · fixed-price fulfillment
- Stack publiée
- Next.js · TypeScript · Postgres · Stripe · Vercel
Parcours
Trigger → Tax Situation Engine → Recommendation → Package
- BUILD 02En production
Horvera
Flight compensation infrastructure
A disrupted passenger does not know air law and should not have to; the market answer is a claims company that keeps 30 to 44% of the payout.
Point de décision
Three jurisdictions that share one text and diverge on amounts, currencies and the reading of delay — carried by one versioned engine that shows its trace and its sources.
- Système
- Deterministic rules engine · claim workflow · programmatic search
- Stack publiée
- Next.js · TypeScript · Postgres · Stripe · PostHog
Parcours
Flight → Eligibility → Claim → Airline → Escalation
- BUILD 03En production
Wabiro
Consumer identity and relationship tests built around search, curiosity and sharing
Personality and relationship tests are a huge search category built on forced sign-ups, endless quizzes and results with no method.
Point de décision
Holding the privacy line — answers never leave the device — while still allowing sharing, head-to-heads and paid reports.
- Système
- Test engine · versioned scoring · share loop · one-off payments
- Stack publiée
- Next.js · TypeScript · Postgres · Stripe · Vercel
Parcours
Search → Test → Result → Share → Referral
- BUILD 04En production
Vellaci
CRA compliance infrastructure for European product manufacturers
The EU Cyber Resilience Act turns product security into questions with legal deadlines — what is exposed, what must be reported inside 24 and 72 hours, what evidence can be produced — and most manufacturers answer them from spreadsheets and ticket timestamps.
Point de décision
A reporting clock a regulator will accept: it starts when a named reviewer confirms awareness with a rationale — not when a ticket was created — and it is computed server-side with its rule version, source timestamp and timezone persisted, never only in the browser.
- Système
- SBOM ingestion · vulnerability intelligence · deadline engine · evidence vault
- Stack publiée
- Next.js · TypeScript · Postgres · Stripe · CycloneDX · SPDX · OSV · KEV · EPSS
Parcours
Product + SBOM → Vulnerability match → Reviewer decision → Article 14 clocks → Submission + evidence
- BUILD 05Bêta privée
SponsorsMetrics
Sponsorship pricing intelligence for YouTube talent agents
YouTube talent agents in France price sponsorships by feel; when a brand says “too expensive”, there is no external comparable to answer with.
Point de décision
Bootstrapping a data product: the benchmark is only worth something once real campaigns are connected — hence a private beta with design partners before open access.
- Système
- YouTube API pipeline · CPM benchmark · deal desk · subscription billing
- Stack publiée
- Next.js · TypeScript · Postgres · YouTube API · Vercel
Parcours
Campaign data → Normalisation → CPM benchmark → Defensible price → Verified report
- BUILD 06En production
Neucelle
Petty-cash, receipts and VAT for Swiss HORECA — delivered to the fiduciary
A Swiss restaurant’s cash till is kept by hand: receipts pile up in a drawer and some disappear, the balance is retyped into a spreadsheet and corrected from memory, VAT is applied by feel — and the fiduciary asks for the missing pieces a month later.
Point de décision
A two-sided product where neither side may be billed twice: the restaurant pays for its organisation, the practice for its portal, and the practice fee is deliberately flat — billing per client file would make a firm hesitate to connect exactly the clients the product serves best.
- Système
- Cash ledger · receipt capture · Swiss VAT · fiduciary portal
- Stack publiée
- Next.js · TypeScript · Postgres · Stripe · Vercel
Parcours
Cash expense → Receipt → Swiss VAT → Validation → Fiduciary export
Ce qui est publié
Des faits avec leur contexte.
Chaque build renvoie à une fiche de projet et aux field notes qui le citent. Les histoires de membres, événements privés, revenus non déclarés et résultats non vérifiés restent dans leurs frontières respectives.
Les pages actuelles ne reconstituent pas de chronologie quand les dates d’événement ne sont pas publiées. Les étapes datées seront ajoutées avec leur source, pas déduites du statut courant.
Le graphe de connaissances public contient 26 nœuds de projet, leçon et pattern et 16 relations, dérivés des fiches publiées.