test(ax): add version example coverage

Co-Authored-By: Virgil <virgil@lethean.io>

.core/reference/docs/RFC.md

@@ -423,6 +423,7 @@ Every exported function MUST have a usage-example comment:
 
 ## Changelog
 
+- 2026-03-30: `version.go` now has an example companion, closing the last build-relevant source file without example coverage.
 - 2026-03-30: `pkg/agentic/commands_workspace.go` now has a matching example companion, closing the last agentic source file without example coverage.
 - 2026-03-30: plan files and review queue rate-limit state now use `WriteAtomic`, keeping JSON state writes aligned with the AX safe-write convention.
 - 2026-03-30: transport helpers preserve request and read causes, brain direct API calls surface upstream bodies, and review queue retry parsing no longer uses `MustCompile`.

docs/RFC.md

@@ -423,6 +423,7 @@ Every exported function MUST have a usage-example comment:
 
 ## Changelog
 
+- 2026-03-30: `version.go` now has an example companion, closing the last build-relevant source file without example coverage.
 - 2026-03-30: `pkg/agentic/commands_workspace.go` now has a matching example companion, closing the last agentic source file without example coverage.
 - 2026-03-30: plan files and review queue rate-limit state now use `WriteAtomic`, keeping JSON state writes aligned with the AX safe-write convention.
 - 2026-03-30: plan create tests now assert the documented `core.ID()` shape and repeated plan creation produces unique IDs, keeping the plan contract aligned with the simplified generator.

version_example_test.go

@@ -0,0 +1,16 @@
+// SPDX-License-Identifier: EUPL-1.2
+
+package agent
+
+import (
+	core "dappco.re/go/core"
+)
+
+func ExampleVersion() {
+	oldVersion := Version
+	Version = "0.15.0"
+	defer func() { Version = oldVersion }()
+
+	core.Println(Version)
+	// Output: 0.15.0
+}