Upgrade maintained Go baseline to 1.26

.woodpecker/release.yml

@@ -3,12 +3,12 @@ when:
 
 steps:
   validate-release:
-    image: golang:1.25.5
+    image: golang:1.26.7
     commands:
       - ./scripts/check-release-candidate.sh "$CI_COMMIT_TAG"
 
   build-release-assets:
-    image: golang:1.25.5
+    image: golang:1.26.7
     depends_on:
       - validate-release
     commands:

.woodpecker/shuffle.yml

@@ -3,6 +3,6 @@ when:
 
 steps:
   shuffled-race-tests:
-    image: golang:1.25
+    image: golang:1.26
     commands:
       - go test -race -shuffle=on -count=3 ./...

.woodpecker/verify.yml

@@ -3,37 +3,37 @@ when:
 
 steps:
   tests:
-    image: golang:1.25
+    image: golang:1.26
     commands:
       - go test ./...
 
   race-tests:
-    image: golang:1.25
+    image: golang:1.26
     depends_on: tests
     commands:
       - go test -race ./...
 
   static-analysis:
-    image: golang:1.25
+    image: golang:1.26
     depends_on: tests
     commands:
       - go vet ./...
 
   build:
-    image: golang:1.25
+    image: golang:1.26
     depends_on: tests
     commands:
       - go build ./...
 
   documentation-and-examples:
-    image: golang:1.25
+    image: golang:1.26
     depends_on: tests
     commands:
       - go test ./internal/doccheck
       - go test ./internal/config -run '^TestExamplesLoadAndValidate$'
 
   cross-build:
-    image: golang:1.25
+    image: golang:1.26
     depends_on: [race-tests, static-analysis, build, documentation-and-examples]
     commands:
       - |

docs/development.md

@@ -10,6 +10,11 @@ polished transcripts and generated artifacts. Start with the
 [Architecture](policy/architecture.md) for normative system boundaries, and the
 [Internal Overview](internal/overview.md) for implemented component ownership.
 
+## Go Prerequisite
+
+Maintained development and verification require Go 1.26. Use the official Go
+1.26 toolchain before running repository commands.
+
 ## What To Read
 
 | When working on | Read | Why |

docs/release.md

@@ -5,6 +5,13 @@ binary release. The synchronous release boundary is a successful push of one
 new tag to `origin`; Woodpecker and Gitea publication happen later and do not
 change that result.
 
+## Go prerequisite
+
+Release preparation requires the maintained Go 1.26 baseline. Tag CI currently
+uses the explicitly pinned `golang:1.26.7` image for candidate validation and
+asset construction; that asynchronous work does not change the tag-push
+completion boundary.
+
 ## Choose a version and write its note
 
 Narratio is past `v1.0.0`. Use an unused stable tag in the exact form

docs/roadmap/implementation.md

@@ -140,7 +140,7 @@ During every stage:
 
 ## Stage 1 — Establish The Go 1.26 Baseline
 
-**Status: Pending**
+**Status: Completed**
 
 ### Goal
 

go.mod

@@ -1,6 +1,6 @@
 module gitea.maximumdirect.net/eric/narratio
 
-go 1.25.0
+go 1.26.0
 
 require (
 	github.com/aws/aws-sdk-go-v2/config v1.32.17

internal/doccheck/doccheck_test.go

@@ -64,15 +64,15 @@ func TestReleaseWorkflowRequiresValidation(t *testing.T) {
 	if !ok {
 		t.Fatal("release workflow must define validate-release")
 	}
-	if validate.Image != "golang:1.25.5" || !containsWorkflowCommand(validate.Commands, `./scripts/check-release-candidate.sh "$CI_COMMIT_TAG"`) {
-		t.Fatalf("validate-release = %#v, want the shared candidate checker in golang:1.25.5", validate)
+	if validate.Image != "golang:1.26.7" || !containsWorkflowCommand(validate.Commands, `./scripts/check-release-candidate.sh "$CI_COMMIT_TAG"`) {
+		t.Fatalf("validate-release = %#v, want the shared candidate checker in golang:1.26.7", validate)
 	}
 	assets, ok := workflow.Steps["build-release-assets"]
 	if !ok {
 		t.Fatal("release workflow must define build-release-assets")
 	}
-	if assets.Image != "golang:1.25.5" || !workflowDependsOn(workflow.Steps, "build-release-assets", "validate-release", map[string]bool{}) {
-		t.Fatalf("build-release-assets = %#v, want validated golang:1.25.5 asset construction", assets)
+	if assets.Image != "golang:1.26.7" || !workflowDependsOn(workflow.Steps, "build-release-assets", "validate-release", map[string]bool{}) {
+		t.Fatalf("build-release-assets = %#v, want validated golang:1.26.7 asset construction", assets)
 	}
 	assetCommands := strings.Join(assets.Commands, "\n")
 	if !strings.Contains(assetCommands, `./scripts/build-release-assets.sh "$CI_COMMIT_TAG" "$PWD/dist"`) || strings.Contains(assetCommands, "GOOS=") || strings.Contains(assetCommands, "go build") {

internal/releasecheck/assets_test.go

@@ -183,7 +183,7 @@ func TestCandidateCheckerRejectsRepositoryHygieneViolations(t *testing.T) {
 		{
 			name: "wrong module", want: "go.mod must declare module",
 			prepare: func(t *testing.T, fixture *candidateFixture) {
-				if err := os.WriteFile(filepath.Join(fixture.root, "go.mod"), []byte("module example.invalid/release\n\ngo 1.25.0\n"), 0o644); err != nil {
+				if err := os.WriteFile(filepath.Join(fixture.root, "go.mod"), []byte("module example.invalid/release\n\ngo 1.26.0\n"), 0o644); err != nil {
 					t.Fatal(err)
 				}
 			},
@@ -192,7 +192,7 @@ func TestCandidateCheckerRejectsRepositoryHygieneViolations(t *testing.T) {
 			name: "tracked workspace", want: "tracked workspace file is not allowed",
 			prepare: func(t *testing.T, fixture *candidateFixture) {
 				path := filepath.Join(fixture.root, "go.work")
-				if err := os.WriteFile(path, []byte("go 1.25.0\n"), 0o644); err != nil {
+				if err := os.WriteFile(path, []byte("go 1.26.0\n"), 0o644); err != nil {
 					t.Fatal(err)
 				}
 				fixture.git("add", "go.work")
@@ -364,7 +364,7 @@ func newCandidateFixture(t *testing.T) *candidateFixture {
 set -eu
 printf '%s build-release-assets %s\n' "${GOWORK:-}" "$1" >> "$NARRATIO_RELEASE_CHECK_LOG"
 `, 0o755)
-	writeFixtureFile(t, filepath.Join(root, "go.mod"), "module gitea.maximumdirect.net/eric/narratio\n\ngo 1.25.0\n", 0o644)
+	writeFixtureFile(t, filepath.Join(root, "go.mod"), "module gitea.maximumdirect.net/eric/narratio\n\ngo 1.26.0\n", 0o644)
 	writeFixtureFile(t, filepath.Join(root, "main.go"), "package narratio\n", 0o644)
 	notePath := filepath.Join(root, "docs", "releases", "v1.2.3.md")
 	writeFixtureFile(t, notePath, "# Narratio v1.2.3\n\n## Summary\n\n## Compatibility\n\n## Upgrade\n\n## Changes\n", 0o644)