Causari

The build · solo founder · ~5 weeks

How Causari was built.

The product is a tool for mapping causal chains of events. The build itself was a causal chain — each decision led to the next, sometimes by surprise. Below: the same product, applied to itself.

Raw record: GitHub · CHANGELOG · 10 ADRs

Full narrative · in detail

Every node, in words.

  1. Origin

    The spark

    Single-file HTML demo of human history with hand-curated causal links. Looked cool. Worked as thought experiment. Filed under 'fun side project' until one reframe.

    POWFLOW prototype

  2. Decision

    The moat reframe

    What if AI agents could query this causal graph via MCP? Visualization tool → structured knowledge infrastructure. Suddenly it's defensible. Suddenly it's a product.

    ADR-0004

  3. Decision

    Adapter discipline from day 1

    Astro + Hono + D1 + Drizzle, but every vendor sits behind an interface. Cost: discipline. Payoff: when pivots came, vendor swaps were mechanical.

    ADR-0002

  4. Shipped

    CKG + MCP shipped

    35 events, 36 hand-authored causal links, 5 derived insight patterns. 5 MCP tools wrapping the graph. Smoke-tested 10/10.

    Phase 1-3

  5. Pivot

    The brand naming epic

    5 rounds + 30+ candidates in one session. Rejected Causora (Causara.ai conflict), Causio (legal AI), Causalia (.com 15yr-owner). Landed on Causari.

    ADR-0005

  6. Discovery

    Three silent wiring bugs

    End-to-end trace found 3 bugs every user would hit. All wiring, not architecture. Lesson: trace one full user journey before declaring done.

    ADR-0008

  7. Pivot

    Stripe blocked Vietnam

    Country dropdown didn't include VN. Adapter discipline saved us — PolarBillingService in 2 hours; composition root flipped Stripe → Polar.

    ADR-0007

  8. Decision

    Demo-first funnel

    Most SaaS lands you on copy + signup wall. Causari embeds the live Canvas in hero. Wow moment moves from minute 5 to second 2.

    v0.4.0

  9. Decision

    Waitlist instead of checkout

    Founder concern: 'what if users charge and I can't deliver yet?' Replaced Pro/Team checkout with waitlist. Real intent, zero risk.

    Pre-GTM

  10. Shipped

    Viral readiness Tier 1

    Founder shared a lesson from prior failure: operational silence kills MVPs at viral inflection. Race condition, webhook idempotency, /api/status, IObservability — all wired.

    ADR-0009

  11. Shipped

    The story you're reading

    CHANGELOG + journey.md + this page. The product maps causal chains; Causari's own build IS a causal chain. Self-referential proof.

    ADR-0010

  12. Shipped

    Responsive + cosmic overview

    Mobile-first UX overhaul (v0.5.1→v0.5.3): SiteHeader hamburger, collapsible panels, touch-move fixes, edge-arrow toggle. Big Bang → present in default view. Brand hierarchy: Causari (parent) + Powflow (product).

    v0.5.3

  13. Now

    Currently shipping →

    Tech ready. Founder ops queue: Polar 4 env vars · GitHub org push · USPTO trademark · custom domain · first beta invites.

Meta moment

You just read a causal chain — rendered as a timeline.

That's Causari. The same view, applied to 70,000 years of human history, your personal life, or your team's decisions.

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