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Displayed code examples are exact excerpts from Apache-2.0 licensed Firefly repositories. These excerpts illustrate actual source code; full application context is linked.
Apache License 2.0 text: /licenses/Apache-2.0.txt
Source copyright notices retained for the displayed excerpts:
PyFly and Rust: Copyright 2026 Firefly Software Foundation.
.NET: Copyright 2024-2026 Firefly Software Foundation.

Firefly for Java
https://github.com/fireflyframework/fireflyframework-java-book/blob/cfd53f2a22cdd4b903b96081365a2eff459650b4/samples/lumen-lending/core-lending-loan-origination/src/main/java/com/firefly/lumen/core/web/LoanApplicationController.java#L35-L50
Verbatim excerpt from the Lumen Lending sample controller: a reactive, validated create endpoint with constructor injection. The class continues below this excerpt.

PyFly
https://github.com/fireflyframework/fireflyframework-pyfly/blob/02b792f1d5b77c23262a876bf9b69a7c67f9ba59/samples/lumen/src/lumen/core/services/wallets/get_wallet_handler.py#L12-L29
Verbatim Lumen sample read handler, including its real imports: the injected repository loads a wallet and maps it to its public DTO.

LaraFly
https://github.com/fireflyframework/fireflyframework-php/blob/d5ccff2a48f46355eef0f8c02b7176eebea55760/samples/lumen/src/Application/Query/GetBalanceHandler.php#L14-L25
Verbatim query-handler class from the Lumen sample: constructor-injected wallet repository, nullable balance result in minor units. The source file above the excerpt contains its namespace and imports.

Firefly for Rust
https://github.com/fireflyframework/fireflyframework-rust/blob/e18e12e207921bf06cb42cf81c883160b45b15a2/samples/lumen-ledger/web/src/main.rs#L32-L46
Verbatim Lumen Ledger entry point: link the actual layer crates, include controllers, and run FireflyApplication on Tokio.

Firefly for .NET
https://github.com/fireflyframework/fireflyframework-dotnet/blob/a41278325edd462a3fbcda096dd6cc44e48e908f/samples/FireflyFramework.Samples.OrdersService.Core/Services/Orders/V1/GetOrderHandler.cs#L15-L30
Verbatim Orders sample query handler, including its real imports: asynchronous repository lookup and nullable DTO projection.

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Original book cover artwork (unmodified):
Firefly for Java by Example: https://github.com/fireflyframework/fireflyframework-java-book/blob/cfd53f2a22cdd4b903b96081365a2eff459650b4/art/cover.png
PyFly by Example: https://raw.githubusercontent.com/fireflyframework/fireflyframework-pyfly/02b792f1d5b77c23262a876bf9b69a7c67f9ba59/book/art/cover.png
Publisher: Firefly Software Foundation. The cover retains its original attribution.
LaraFly by Example: https://raw.githubusercontent.com/fireflyframework/fireflyframework-php/c29bdc90b90f7b6b237073ed103cd23712ba963e/book/art/cover.png
Publisher: Firefly Software Solutions Inc. The cover retains its original attribution.
Firefly for Rust by Example: https://github.com/fireflyframework/fireflyframework-rust/blob/e18e12e207921bf06cb42cf81c883160b45b15a2/docs/book/art/cover.svg

Firefly Agentic
Copyright 2026 Firefly Software Foundation. Apache-2.0.
https://github.com/fireflyframework/fireflyframework-agentic/blob/36f4cd44fc276d7917ebfafa70f51d5846964c00/examples/classifier.py#L47-L67
Verbatim classifier example function. Surrounding setup imports the classifier factory, loads the selected model and credentials from the environment, and defines the sample inputs.