# Building Apps with Arcadia

Arcadia’s intent-driven substrate lets anyone from no-code curators to full protocol teams turn ideas into products without rebuilding liquidity plumbing, solver networks, or proof pipelines. This section outlines the most common integration patterns; if you have an idea that falls outside these paths, we would love to hear from you.

## <sub>1. User-Aligned Applications</sub>

Arcadia shifts “programming” from low-level contract logic to user outcomes. Builders express what the user wants, not how to achieve it.

* **Curate objectives.** Act as a front-end strategist who defines portfolio goals or trade criteria.
* **Design capital policies.** program allocation rules - risk bands, target yields, diversification limits - as declarative intents rather than implementation code.
* **Automate workflows.** Stitch together ready-made building blocks into reusable pipelines.

In every role, publishing an intent is the only interface required; execution details are delegated to solver markets.

## <sub>2. Autonomous Accounts & Agents</sub>

Arcadia’s automatons behave like long-running, guard-railed accounts. They lock resources with standing instructions as long-running intents, while letting anyone optimise execution. For example:

* **Policy-based resource splits**: “keep 10% of stablecoin balance liquid, 30% in money-markets, 60% in fixed-term leverage.”
* **Account specific transaction rules**: attach gas cost, KYC requirement, asset exposure constraints so that solvers can compete on execution without violating local declared rules.
* **Recurring or automated actions**: Automate recurring BTC buys, or auto-stake reward tokens.

## <sub>3. Aggregators in a Fragmented World</sub>

Specialized aggregators can abstract away chain, liquidity venue, trust model, collateral type, or term length simply by publishing venue-agnostic intents. Aggregators internalize fragmentation and deliver a single, coherent interface over an otherwise fragmented landscape.

## <sub>4. Specialized Service Networks</sub>

Service providers integrate once and become discoverable everywhere. Developers can chain multiple intent markets together via automatons to build sophisticated off-chain services such as multi-protocol liquidation services, automated arbitrage services, margin-optimization desks, stable-peg maintenance networks, and more.

## <sub>5. Event-Based Automation & Unified Accounting</sub>

Arcadia's on-chain pub/sub event system streams events from any connected blockchain or intent market. This makes it possible to build on-chain and censorship resistant automation:

* **IF-THIS-THEN-THAT logic**: Define triggers and actions, without having to build custom executor networks.
* **Global balances**: Reason over portfolio-level totals instead of per-chain shards, enabling unified accounting, risk checks, and compliance reporting.
* **Composable pipelines**: Events can publish new intents, letting developers build asynchronous, modular systems rather than prescriptive synchronous call chains.

## <sub>Summary</sub>

Khalani Arcadia turns outcome-based design into a modular practice:

1. Start with the user’s objective
2. Encode any semantic gap as an intent
3. Connect intents and state changes through the event stream instead of hard-wired calls
4. Let solvers handle the heavy lifting

By integrating with Arcadia, teams ship faster, reduce bespoke integrations, and keep their users in full control.
