[stevendborrelli]

Description of your changes

The TypeScript function SDK grew a serve module in v0.7.0, so a composition function no longer has to hand-assemble its own gRPC server. This adopts it, and picks up two other SDK/codegen affordances the function was not using.

Use serve() for the entrypoint

src/main.ts drops from 85 lines to 6. The commander flag parsing, pino logger construction, server startup and signal handling were scaffolded boilerplate that nobody had edited since:

#!/usr/bin/env node

import { serve } from '@crossplane-org/function-sdk-typescript';
import { compose } from './function.js';

serve(compose, { name: 'configuration-aws-network' });

src/function.ts becomes a ComposeFunction instead of a class implementing FunctionHandler. serve() hands it a response already built from the request, so to(req) goes away, and ComposeResponse narrows desired to non-optional so resources are written straight to rsp.desired.resources with no !. The getDesiredComposedResources() / setDesiredComposedResources() round trip is redundant once you hold that map directly, since to() aliases it rather than copying.

commander and pino are no longer direct dependencies.

Take the XR status type from the generated model

XRStatus was hand-written as { [key: string]: string | string[] }, restating the status block in apis/network/definition.yaml and accepting any field name. It now comes from the model the CLI already generates:

type XRStatus = NonNullable<INetwork['status']>;

The status is built by assignment rather than by spreading cond && { field }, because object spreads are not excess-property checked — with the spread form a misspelt field still compiled, making the precise type worthless at the one place it mattered. Now xrStatus.vpcID = vpcId fails with Property 'vpcID' does not exist ... Did you mean 'vpcId'?.

Use fromModel() for composed resources

Ten call sites of

desiredComposed['igw'] = Resource.fromJSON({ resource: igw.toJSON() });

become desiredComposed['igw'] = fromModel(igw). validate() stays a separate explicit call — no SDK helper validates, and since every value read off the XR is any at runtime, it is the only thing standing between a missing field and a malformed resource reaching the API server.

Docs

The README never said how to get a crossplane CLI with crossplane/cli#170, which is a prerequisite for everything in the Development section — added the clone and build steps. Also refreshed the "Updating the Function" example, which showed the superseded pattern.

Testing

Verified behaviour-preserving, not merely green:

• The previous Function class and the new compose produce identical responses across every fixture in test/test-cases/, checked by running both against the same inputs and asserting deep equality. This also confirms the SDK change is additive — the old class still compiles and runs unmodified on 0.7.0.
• crossplane render output is byte-identical before and after every commit here.
• Resource.fromJSON and fromModel were compared directly: identical protobuf encodings, so the refactor is a true drop-in.
• Existing suite passes unchanged: 18/18. build, lint and format:check clean.
• Manually confirmed --help renders and the server shuts down cleanly on SIGTERM with exit 0.
• The documented CLI build was run rather than transcribed from CI — it succeeds on Go 1.26.2. Note a source-built CLI reports an empty client version, which the README calls out so it does not read as a broken install.

test/test-helpers.ts and tsconfig.eslint.json carry formatting-only changes from npm run format; they had pre-existing drift.

I have:

• Read and followed Crossplane's contribution process.
• Added or updated unit tests for my change.

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