[dinoconstantinou87]

Summary

Moves swift-openapi-generator from 1.10.2 to 1.13.0 and makes make generate notice when the pinned version changes.

Generator upgrade

	Before	After	Why
Generator (Makefile)	1.10.2	1.13.0	Four minor versions behind
swift-openapi-runtime floor (Package.swift)	1.8.2	1.11.0	The generator's own minimum since 1.12.0
Generator cache keys (ci.yml, linux.yml, macos.yml)	1.10.2	1.13.0	So CI builds the new generator

Package.resolved doesn't change. It already had runtime 1.12.1 from #35.

OpenAPIKit v6, which arrived in 1.12.1 with stricter validation, accepts the spec with no warnings or errors. Apart from two changes, the generated code is the same as 1.10.2's: every import is now public (1.13.0, following accessModifier), and Encoder, Decoder and Error are written as Swift.Encoder and so on (1.11.0).

Why not 1.13.1: its namespace file splitting is always on. With accessModifier: public, it produces 24 UnusedImportAccess warnings from imports that the small split files never use. The issue is tracked upstream in apple/swift-openapi-generator#946, and the fix, apple/swift-openapi-generator#947, is unreleased. Apart from the splitting, 1.13.1 only adds a clearer error for duplicate schema names. Worth bumping again once #947 ships.

Makefile: re-clone on a version change

Before this, the clone target had no prerequisites, so changing SWIFT_OPENAPI_GENERATOR_GIT_TAG left any existing clone in place and make generate kept running the old generator without saying so. The clone is now keyed on a .cloned-<tag> stamp file inside it. If the stamp is missing, make generate deletes the clone and Sources/FreeAgentAPI/Generated, then re-clones and rebuilds. An existing clone without a stamp is refreshed once.

Generated/ is cleared too because the generator never deletes files it no longer produces. Switching from 1.13.1 back to 1.13.0 left 1.13.1's split files behind, and the build failed with "invalid redeclaration of 'Components'".

Testing

• macOS: 92 API and 25 CLI unit tests pass, make format and make lint clean. Built with 1.13.0 and 1.13.1 and counted warnings from generated code: none with 1.13.0, 24 with 1.13.1.
• make generate checked for real, not just dry runs: an existing unstamped clone refreshes once, an unchanged tag deletes and rebuilds nothing, and 1.13.0 -> 1.13.1 -> 1.13.0 leaves the right generator and only its own files each time, and the build passes.
• Integration suites not run. They were skipped locally, and CI's Integration Tests job skips them because openapi/ is unchanged. The generated code differs only in import modifiers and name qualification, so the requests and responses on the wire can't change.

🤖 Generated with Claude Code