Phase 1 Wiki Template refactor

internal/topdata/wiki_deploy.go

@@ -702,6 +702,7 @@ func computeManagedHash(content string) string {
 	if !ok {
 		managed = content
 	}
+	managed = normalizePreservedSectionBodies(managed)
 	h := sha256.Sum256([]byte(strings.TrimSpace(managed)))
 	return fmt.Sprintf("%x", h[:])
 }

internal/topdata/wiki_deploy_test.go

@@ -147,6 +147,49 @@ func TestDeployWikiCreatesNodeBBTopicAndWritesManifest(t *testing.T) {
 	}
 }
 
+func TestMergeManagedContentPreservesUserTopAndBottomSections(t *testing.T) {
+	existing := strings.Join([]string{
+		`<!-- sow-topdata-wiki:page=classes:acolyte -->`,
+		`<!-- sow-topdata-wiki:managed:start hash="sha256:old" -->`,
+		`<h1>Acolyte</h1>`,
+		`<!-- sow-topdata-wiki:manual:start id="user_top" -->`,
+		`<p>User-written overview.</p>`,
+		`<!-- sow-topdata-wiki:manual:end id="user_top" -->`,
+		`<p>Old generated body.</p>`,
+		`<!-- sow-topdata-wiki:manual:start id="notes" -->`,
+		`<h2>Notes</h2><p>User note.</p>`,
+		`<!-- sow-topdata-wiki:manual:end id="notes" -->`,
+		`<!-- sow-topdata-wiki:managed:end -->`,
+	}, "\n")
+	generated := strings.Join([]string{
+		`<!-- sow-topdata-wiki:page=classes:acolyte -->`,
+		`<!-- sow-topdata-wiki:managed:start hash="sha256:new" -->`,
+		`<h1>Acolyte</h1>`,
+		`<!-- sow-topdata-wiki:manual:start id="user_top" -->`,
+		`<p></p>`,
+		`<!-- sow-topdata-wiki:manual:end id="user_top" -->`,
+		`<p>New generated body.</p>`,
+		`<!-- sow-topdata-wiki:manual:start id="notes" -->`,
+		`<h2>Notes</h2><p></p>`,
+		`<!-- sow-topdata-wiki:manual:end id="notes" -->`,
+		`<!-- sow-topdata-wiki:managed:end -->`,
+	}, "\n")
+
+	merged := mergeManagedContent(existing, generated)
+	for _, expected := range []string{
+		"<p>User-written overview.</p>",
+		"<h2>Notes</h2><p>User note.</p>",
+		"<p>New generated body.</p>",
+	} {
+		if !strings.Contains(merged, expected) {
+			t.Fatalf("expected merged content to contain %q:\n%s", expected, merged)
+		}
+	}
+	if strings.Contains(merged, "Old generated body") {
+		t.Fatalf("expected old generated body to be replaced:\n%s", merged)
+	}
+}
+
 func TestDeployWikiCreatesNodeBBTopicWithoutFallbackForDefaultThreeCharacterTitle(t *testing.T) {
 	root := t.TempDir()
 	sourceDir := filepath.Join(root, "pages")

internal/topdata/wiki_formatters.go

@@ -0,0 +1,113 @@
+package topdata
+
+import (
+	"fmt"
+	"strings"
+)
+
+func (ctx *wikiContext) renderWikiFormatter(spec string, page wikiTemplatePage) (string, error) {
+	name := strings.Fields(spec)
+	if len(name) == 0 {
+		return "", fmt.Errorf("render wiki template for %s: empty formatter", page.PageID)
+	}
+	switch name[0] {
+	case "Description":
+		return dokuWikiToNodeBBHTML(toDokuWiki(ctx.resolveRowDescription(page.Category, page.Row))), nil
+	case "FactsTable":
+		return dokuWikiToNodeBBHTML(ctx.renderFacts(page.Category, page.Key, page.Row)), nil
+	case "Prerequisites":
+		return dokuWikiToNodeBBHTML(formatFact("Prerequisites", ctx.renderFeatPrerequisites(page.Row))), nil
+	case "SkillList":
+		if page.Category != "classes" {
+			return "", nil
+		}
+		return dokuWikiToNodeBBHTML(ctx.renderClassSkillList(page.Row)), nil
+	case "ClassFeatureTable":
+		if page.Category != "classes" {
+			return "", nil
+		}
+		return dokuWikiToNodeBBHTML(ctx.renderClassFeatureTable(page.Row)), nil
+	case "FeatProgression":
+		if page.Category != "classes" {
+			return "", nil
+		}
+		return dokuWikiToNodeBBHTML(ctx.renderClassFeatProgression(page.Row)), nil
+	case "SpellTable", "SavesProgression", "BABProgression":
+		return "", nil
+	case "RaceFeatList":
+		return dokuWikiToNodeBBHTML(formatFact("Racial Feats", ctx.renderRaceFeatList(page.Row))), nil
+	case "StatusCallout":
+		return buildWikiStatusBlock(page.Status, page.Category), nil
+	case "RaceNameForms":
+		return dokuWikiToNodeBBHTML(ctx.renderRaceNameForms(page.Row)), nil
+	case "UserBottomFallback":
+		return "", nil
+	default:
+		return "", fmt.Errorf("render wiki template for %s: unknown formatter %q", page.PageID, name[0])
+	}
+}
+
+func (ctx *wikiContext) renderClassSkillList(row map[string]any) string {
+	table := ctx.tableForValue(fieldValue(row, "SkillsTable"), ctx.classSkillTables)
+	if table == nil {
+		return ""
+	}
+	skills := []string{}
+	for _, skillRow := range table.Rows {
+		if stringValue(skillRow, "ClassSkill") != "1" {
+			continue
+		}
+		name := ctx.renderReference(fieldValue(skillRow, "SkillIndex"), ctx.skillIDToKey, ctx.resolveSkillName)
+		if name != "" {
+			skills = append(skills, name)
+		}
+	}
+	if len(skills) == 0 {
+		return ""
+	}
+	return "==== Class Skills ====\n\n  * " + strings.Join(skills, ", ")
+}
+
+func (ctx *wikiContext) renderClassFeatProgression(row map[string]any) string {
+	table := ctx.tableForValue(fieldValue(row, "FeatsTable"), ctx.classFeatTables)
+	if table == nil {
+		return ""
+	}
+	lines := []string{}
+	byLevel := map[string][]string{}
+	selectable := []string{}
+	for _, featRow := range table.Rows {
+		name := ctx.renderReference(fieldValue(featRow, "FeatIndex"), ctx.featIDToKey, ctx.resolveFeatName)
+		if name == "" {
+			name = ctx.renderReference(fieldValue(featRow, "FeatIndex"), nil, func(string) string { return "" })
+		}
+		if name == "" {
+			continue
+		}
+		level := stringValue(featRow, "GrantedOnLevel")
+		if level == "" || strings.HasPrefix(level, "-") {
+			selectable = append(selectable, name)
+			continue
+		}
+		byLevel[level] = append(byLevel[level], name)
+	}
+	if len(byLevel) > 0 {
+		lines = append(lines, "==== Granted Feats ====", "")
+		for _, level := range sortedKeys(byLevel) {
+			lines = append(lines, "  * Level "+level+": "+strings.Join(byLevel[level], ", "))
+		}
+		lines = append(lines, "")
+	}
+	if len(selectable) > 0 {
+		lines = append(lines, "==== Selectable Feats ====", "", "  * "+strings.Join(selectable, ", "), "")
+	}
+	return strings.TrimSpace(strings.Join(lines, "\n"))
+}
+
+func (ctx *wikiContext) renderClassFeatureTable(row map[string]any) string {
+	table := ctx.tableForValue(fieldValue(row, "BonusFeatsTable"), ctx.classBonusTables)
+	if table == nil || len(table.Rows) == 0 {
+		return ""
+	}
+	return "==== Bonus Feats ====\n\n  * Bonus feat table: " + table.OutputStem
+}

internal/topdata/wiki_native.go

@@ -26,7 +26,7 @@ const (
 	legacyWikiRootDirName = ".wiki"
 	wikiPagesDirName      = "pages"
 	wikiStateFileName     = "state.json"
-	wikiGeneratorVersion  = "nodebb-tiptap-html-v1"
+	wikiGeneratorVersion  = "nodebb-tiptap-html-v2"
 	wikiGeneratedStatus   = "generated"
 	wikiSkippedStatus     = "skipped"
 )
@@ -68,6 +68,7 @@ type wikiManualSectionsDocument struct {
 
 type wikiManualSection struct {
 	ID          string `json:"id" yaml:"id"`
+	Alias       string `json:"alias" yaml:"alias"`
 	Heading     string `json:"heading" yaml:"heading"`
 	Placement   string `json:"placement" yaml:"placement"`
 	InitialHTML string `json:"initial_html" yaml:"initial_html"`
@@ -107,6 +108,8 @@ type wikiContext struct {
 	raceFeatTables   map[string]wikiTable
 	statuses         map[string]map[string]string
 	implementedFeats map[string]struct{}
+	manualSections   []wikiManualSection
+	templateDir      string
 }
 
 func buildWiki(p *project.Project, nativeResult BuildResult, force bool, progress func(string)) (wikiResult, error) {
@@ -137,6 +140,9 @@ func buildWiki(p *project.Project, nativeResult BuildResult, force bool, progres
 	if err != nil {
 		return wikiResult{}, err
 	}
+	manualSections := loadWikiManualSections(p)
+	ctx.manualSections = manualSections
+	ctx.templateDir = filepath.Join(p.TopDataWikiSourceDir(), filepath.FromSlash(p.EffectiveConfig().TopData.Wiki.TemplatesDir), "pages")
 
 	if err := os.RemoveAll(outputDir); err != nil {
 		return wikiResult{}, fmt.Errorf("clean wiki output: %w", err)
@@ -154,7 +160,7 @@ func buildWiki(p *project.Project, nativeResult BuildResult, force bool, progres
 		if err := os.MkdirAll(filepath.Dir(path), 0o755); err != nil {
 			return err
 		}
-		content = renderNodeBBManagedHTML(pageID, content, loadWikiManualSections(p))
+		content = renderNodeBBManagedHTML(pageID, content, manualSections)
 		if err := os.WriteFile(path, []byte(content), 0o644); err != nil {
 			return err
 		}
@@ -182,7 +188,7 @@ func buildWiki(p *project.Project, nativeResult BuildResult, force bool, progres
 	if err := generateEntityPages(outputDir, ctx, writePage); err != nil {
 		return wikiResult{}, err
 	}
-	if err := generateStatusPages(outputDir, pageStatuses, pageTitles, p.EffectiveConfig().TopData.Wiki.ManagedNamespaces, loadWikiManualSections(p)); err != nil {
+	if err := generateStatusPages(outputDir, pageStatuses, pageTitles, p.EffectiveConfig().TopData.Wiki.ManagedNamespaces, manualSections); err != nil {
 		return wikiResult{}, err
 	}
 	if err := indexUnregisteredWikiPages(rootDir, outputDir, p.EffectiveConfig().TopData.Wiki.StalePages.Default, &pageIndex); err != nil {
@@ -209,10 +215,7 @@ func buildWiki(p *project.Project, nativeResult BuildResult, force bool, progres
 }
 
 func loadWikiManualSections(p *project.Project) []wikiManualSection {
-	defaults := []wikiManualSection{
+	defaults := defaultWikiManualSections()
-		{ID: "notes", Heading: "Notes", InitialHTML: "<h2>Notes</h2><p></p>"},
-		{ID: "see_also", Heading: "See Also", InitialHTML: "<h2>See Also</h2><p></p>"},
-	}
 	cfg := p.EffectiveConfig().TopData.Wiki
 	path := filepath.Join(p.TopDataWikiSourceDir(), filepath.FromSlash(cfg.ManualSectionsDir), "default.yaml")
 	raw, err := os.ReadFile(path)
@@ -229,6 +232,15 @@ func loadWikiManualSections(p *project.Project) []wikiManualSection {
 		if section.ID == "" {
 			continue
 		}
+		section.Alias = strings.TrimSpace(section.Alias)
+		if section.Alias == "" {
+			switch section.ID {
+			case "user_top":
+				section.Alias = "UserTopSection"
+			case "notes":
+				section.Alias = "UserBottomSection"
+			}
+		}
 		if strings.TrimSpace(section.InitialHTML) == "" {
 			heading := strings.TrimSpace(section.Heading)
 			if heading == "" {
@@ -358,13 +370,15 @@ func computeWikiSourceDigest(sourceDir string) (string, error) {
 		filepath.Join(sourceDir, "data", "baseitems"),
 		filepath.Join(sourceDir, "data", "classes"),
 		filepath.Join(sourceDir, "data", "racialtypes"),
+		filepath.Join(sourceDir, "wiki"),
 	}
 	for _, dir := range relevantSourceDirs {
 		_ = filepath.WalkDir(dir, func(path string, d fs.DirEntry, err error) error {
 			if err != nil || d.IsDir() {
 				return err
 			}
-			if strings.EqualFold(filepath.Ext(path), ".json") {
+			switch strings.ToLower(filepath.Ext(path)) {
+			case ".json", ".yaml", ".yml", ".html":
 				files = append(files, path)
 			}
 			return nil
@@ -760,20 +774,20 @@ func (ctx *wikiContext) shouldGeneratePage(category, key string, row map[string]
 }
 
 func (ctx *wikiContext) renderPage(category, key string, row map[string]any, title string) (string, error) {
-	sections := []string{
+	manualSections := ctx.manualSections
-		"====== " + title + " ======",
+	if len(manualSections) == 0 {
-		"",
+		manualSections = defaultWikiManualSections()
-		buildWikiStatusBlock(ctx.pageStatus(category, key, row), category),
-		"",
-		toDokuWiki(ctx.resolveRowDescription(category, row)),
-		"",
-		ctx.renderFacts(category, key, row),
-		"",
-		ctx.renderProgression(category, row),
-		"",
-		ctx.renderRaceNameForms(row),
 	}
-	return ensureTrailingNewline(strings.Join(sections, "\n")), nil
+	page := wikiTemplatePage{
+		PageID:         wikiPageIDForKey(key),
+		Category:       category,
+		Key:            key,
+		Title:          title,
+		Status:         ctx.pageStatus(category, key, row),
+		Row:            row,
+		ManualSections: manualSections,
+	}
+	return ctx.renderWikiPageTemplate(category, page)
 }
 
 func (ctx *wikiContext) renderFacts(category, key string, row map[string]any) string {
@@ -1787,11 +1801,13 @@ func renderNodeBBManagedHTML(pageID, sourceText string, manualSections []wikiMan
 		strings.TrimSpace(body),
 		"<!-- sow-topdata-wiki:managed:end -->",
 	}
+	renderedSections := extractManualRegions(body)
 	for _, section := range manualSections {
+		if _, ok := renderedSections[section.ID]; ok {
+			continue
+		}
 		parts = append(parts,
-			"<!-- sow-topdata-wiki:manual:start id=\""+html.EscapeString(section.ID)+"\" -->",
+			renderWikiManualSection(section),
-			strings.TrimSpace(section.InitialHTML),
-			"<!-- sow-topdata-wiki:manual:end id=\""+html.EscapeString(section.ID)+"\" -->",
 		)
 	}
 	return ensureTrailingNewline(strings.Join(parts, "\n"))

internal/topdata/wiki_native_test.go

@@ -141,6 +141,111 @@ func TestWikiClassNamePrefersFullNameInsteadOfShortCode(t *testing.T) {
 	}
 }
 
+func TestWikiTemplateRendersFieldsFormattersAndPreservedTopSection(t *testing.T) {
+	ctx := &wikiContext{}
+	page := wikiTemplatePage{
+		PageID:   "classes:acolyte",
+		Category: "classes",
+		Key:      "classes:acolyte",
+		Title:    "Acolyte",
+		Status:   wikiStatusNew,
+		Row: map[string]any{
+			"HitDie":         6,
+			"SkillPointBase": 4,
+			"Description": map[string]any{"tlk": map[string]any{
+				"text": "Acolyte description.",
+			}},
+		},
+		ManualSections: []wikiManualSection{
+			{ID: "user_top", Alias: "UserTopSection", InitialHTML: "<p></p>"},
+			{ID: "notes", Alias: "UserBottomSection", InitialHTML: "<h2>Notes</h2><p></p>"},
+		},
+	}
+
+	got, err := ctx.renderWikiTemplateString("classes.html", `<h1>{{title}}</h1>
+{{UserTopSection}}
+<p>Hit Die: {{HitDie}}</p>
+<p>Skill Points: {{SkillPointBase}}</p>
+{{format:StatusCallout}}
+{{format:Description}}
+{{UserBottomSection}}`, page)
+	if err != nil {
+		t.Fatalf("render template: %v", err)
+	}
+
+	if !strings.Contains(got, "<h1>Acolyte</h1>\n<!-- sow-topdata-wiki:manual:start id=\"user_top\" -->") {
+		t.Fatalf("expected preserved top section directly after title, got:\n%s", got)
+	}
+	for _, expected := range []string{
+		"<p>Hit Die: 6</p>",
+		"<p>Skill Points: 4</p>",
+		"This is a new class!",
+		"<p>Acolyte description.</p>",
+		`<!-- sow-topdata-wiki:manual:start id="notes" -->`,
+	} {
+		if !strings.Contains(got, expected) {
+			t.Fatalf("expected %q in rendered template:\n%s", expected, got)
+		}
+	}
+}
+
+func TestWikiTemplateMissingFieldFailsUnlessDefaultProvided(t *testing.T) {
+	ctx := &wikiContext{}
+	page := wikiTemplatePage{PageID: "classes:acolyte", Category: "classes", Title: "Acolyte", Row: map[string]any{}}
+
+	if _, err := ctx.renderWikiTemplateString("classes.html", `<p>{{HitDie}}</p>`, page); err == nil || !strings.Contains(err.Error(), `missing field "HitDie"`) {
+		t.Fatalf("expected missing field error, got %v", err)
+	}
+
+	got, err := ctx.renderWikiTemplateString("classes.html", `<p>{{field:HitDie|default=unknown}}</p>`, page)
+	if err != nil {
+		t.Fatalf("expected defaulted field to render, got %v", err)
+	}
+	if got != "<p>unknown</p>" {
+		t.Fatalf("expected default value, got %q", got)
+	}
+}
+
+func TestWikiManagedHashIgnoresPreservedSectionBody(t *testing.T) {
+	first := strings.Join([]string{
+		`<!-- sow-topdata-wiki:page=classes:acolyte -->`,
+		`<!-- sow-topdata-wiki:managed:start hash="sha256:first" -->`,
+		`<h1>Acolyte</h1>`,
+		`<!-- sow-topdata-wiki:manual:start id="user_top" -->`,
+		`<p>Original user edit.</p>`,
+		`<!-- sow-topdata-wiki:manual:end id="user_top" -->`,
+		`<p>Generated.</p>`,
+		`<!-- sow-topdata-wiki:managed:end -->`,
+	}, "\n")
+	second := strings.Replace(first, "<p>Original user edit.</p>", "<p>Changed by a user.</p>", 1)
+
+	if computeManagedHash(first) != computeManagedHash(second) {
+		t.Fatalf("expected preserved section body not to affect managed hash")
+	}
+}
+
+func TestWikiSourceDigestIncludesTemplates(t *testing.T) {
+	root := t.TempDir()
+	mkdirAll(t, filepath.Join(root, "data", "skills"))
+	mkdirAll(t, filepath.Join(root, "wiki", "templates", "pages"))
+	writeFile(t, filepath.Join(root, "data", "skills", "base.json"), `{"rows":[]}`+"\n")
+	templatePath := filepath.Join(root, "wiki", "templates", "pages", "skills.html")
+	writeFile(t, templatePath, `<h1>{{title}}</h1>`+"\n")
+
+	before, err := computeWikiSourceDigest(root)
+	if err != nil {
+		t.Fatalf("compute initial digest: %v", err)
+	}
+	writeFile(t, templatePath, `<h1>{{title}}</h1><p>Changed</p>`+"\n")
+	after, err := computeWikiSourceDigest(root)
+	if err != nil {
+		t.Fatalf("compute changed digest: %v", err)
+	}
+	if before == after {
+		t.Fatalf("expected template edit to change wiki source digest")
+	}
+}
+
 func TestWikiPageIDForKeyNormalizesSlashAndUnderscoreSeparators(t *testing.T) {
 	got := wikiPageIDForKey("feat:special/attacks_bull_rush")
 	if want := "feat:special:attacks:bull:rush"; got != want {

internal/topdata/wiki_preserve.go

@@ -0,0 +1,55 @@
+package topdata
+
+import "strings"
+
+func normalizePreservedSectionBodies(content string) string {
+	var out strings.Builder
+	offset := 0
+	for {
+		startRel := strings.Index(content[offset:], manualStartMarkerPrefix)
+		if startRel < 0 {
+			out.WriteString(content[offset:])
+			break
+		}
+		start := offset + startRel
+		startEndRel := strings.Index(content[start:], "-->")
+		if startEndRel < 0 {
+			out.WriteString(content[offset:])
+			break
+		}
+		startMarker := content[start : start+startEndRel+len("-->")]
+		id := markerID(startMarker)
+		if id == "" {
+			out.WriteString(content[offset : start+len(startMarker)])
+			offset = start + len(startMarker)
+			continue
+		}
+		endPrefix := manualEndMarkerPrefix + " id=\"" + id + "\""
+		endRel := strings.Index(content[start+len(startMarker):], endPrefix)
+		if endRel < 0 {
+			out.WriteString(content[offset:])
+			break
+		}
+		end := start + len(startMarker) + endRel
+		endEndRel := strings.Index(content[end:], "-->")
+		if endEndRel < 0 {
+			out.WriteString(content[offset:])
+			break
+		}
+		endMarker := content[end : end+endEndRel+len("-->")]
+		out.WriteString(content[offset:start])
+		out.WriteString(startMarker)
+		out.WriteString("\n<!-- preserved-section-body -->\n")
+		out.WriteString(endMarker)
+		offset = end + len(endMarker)
+	}
+	return out.String()
+}
+
+func defaultWikiManualSections() []wikiManualSection {
+	return []wikiManualSection{
+		{ID: "user_top", Alias: "UserTopSection", Heading: "", InitialHTML: "<p></p>"},
+		{ID: "notes", Alias: "UserBottomSection", Heading: "Notes", InitialHTML: "<h2>Notes</h2><p></p>"},
+		{ID: "see_also", Heading: "See Also", InitialHTML: "<h2>See Also</h2><p></p>"},
+	}
+}

internal/topdata/wiki_template.go

@@ -0,0 +1,223 @@
+package topdata
+
+import (
+	"fmt"
+	"html"
+	"os"
+	"path/filepath"
+	"strings"
+)
+
+type wikiTemplatePage struct {
+	PageID         string
+	Category       string
+	Key            string
+	Title          string
+	Status         string
+	Row            map[string]any
+	ManualSections []wikiManualSection
+}
+
+func (ctx *wikiContext) renderWikiPageTemplate(category string, page wikiTemplatePage) (string, error) {
+	name := wikiTemplateName(category)
+	source, path := ctx.loadWikiTemplateSource(name)
+	if source == "" && name != "default.html" {
+		source, path = ctx.loadWikiTemplateSource("default.html")
+	}
+	if source == "" {
+		source = builtinWikiTemplate(category)
+		path = "builtin:" + name
+	}
+	return ctx.renderWikiTemplateString(path, source, page)
+}
+
+func wikiTemplateName(category string) string {
+	switch category {
+	case "classes", "feat", "skills", "spells", "racialtypes", "baseitems":
+		return category + ".html"
+	default:
+		return "default.html"
+	}
+}
+
+func (ctx *wikiContext) loadWikiTemplateSource(name string) (string, string) {
+	if strings.TrimSpace(ctx.templateDir) == "" {
+		return "", ""
+	}
+	path := filepath.Join(ctx.templateDir, filepath.FromSlash(name))
+	raw, err := os.ReadFile(path)
+	if err != nil {
+		return "", path
+	}
+	return string(raw), path
+}
+
+func builtinWikiTemplate(category string) string {
+	switch category {
+	case "classes":
+		return `<h1>{{title}}</h1>
+{{UserTopSection}}
+{{format:StatusCallout}}
+{{format:Description}}
+{{format:FactsTable}}
+{{format:SkillList}}
+{{format:FeatProgression}}
+{{format:UserBottomFallback}}`
+	case "racialtypes":
+		return `<h1>{{title}}</h1>
+{{UserTopSection}}
+{{format:StatusCallout}}
+{{format:Description}}
+{{format:FactsTable}}
+{{format:RaceNameForms}}
+{{format:UserBottomFallback}}`
+	default:
+		return `<h1>{{title}}</h1>
+{{UserTopSection}}
+{{format:StatusCallout}}
+{{format:Description}}
+{{format:FactsTable}}
+{{format:UserBottomFallback}}`
+	}
+}
+
+func (ctx *wikiContext) renderWikiTemplateString(path, source string, page wikiTemplatePage) (string, error) {
+	var out strings.Builder
+	offset := 0
+	seenSections := map[string]struct{}{}
+	for {
+		start := strings.Index(source[offset:], "{{")
+		if start < 0 {
+			out.WriteString(source[offset:])
+			break
+		}
+		start += offset
+		end := strings.Index(source[start+2:], "}}")
+		if end < 0 {
+			return "", fmt.Errorf("render wiki template %s for %s: unclosed placeholder", path, page.PageID)
+		}
+		end += start + 2
+		out.WriteString(source[offset:start])
+		token := strings.TrimSpace(source[start+2 : end])
+		rendered, sectionID, err := ctx.renderWikiTemplateToken(path, token, page)
+		if err != nil {
+			return "", err
+		}
+		if sectionID != "" {
+			if _, exists := seenSections[sectionID]; exists {
+				return "", fmt.Errorf("render wiki template %s for %s: duplicate preserved section %q", path, page.PageID, sectionID)
+			}
+			seenSections[sectionID] = struct{}{}
+		}
+		out.WriteString(rendered)
+		offset = end + 2
+	}
+	return strings.TrimSpace(out.String()), nil
+}
+
+func (ctx *wikiContext) renderWikiTemplateToken(path, token string, page wikiTemplatePage) (string, string, error) {
+	switch token {
+	case "title":
+		return html.EscapeString(page.Title), "", nil
+	case "page_id":
+		return html.EscapeString(page.PageID), "", nil
+	case "status":
+		return html.EscapeString(page.Status), "", nil
+	}
+	if section, ok := wikiManualSectionForAlias(page.ManualSections, token); ok {
+		return renderWikiManualSection(section), section.ID, nil
+	}
+	if strings.HasPrefix(token, "format:") {
+		rendered, err := ctx.renderWikiFormatter(strings.TrimSpace(strings.TrimPrefix(token, "format:")), page)
+		return rendered, "", err
+	}
+	if strings.HasPrefix(token, "field:") {
+		rendered, err := ctx.renderExplicitWikiField(path, strings.TrimSpace(strings.TrimPrefix(token, "field:")), page)
+		return rendered, "", err
+	}
+	rendered, err := ctx.renderRequiredWikiField(path, token, page)
+	return rendered, "", err
+}
+
+func wikiManualSectionForAlias(sections []wikiManualSection, alias string) (wikiManualSection, bool) {
+	for _, section := range sections {
+		if section.Alias == alias {
+			return section, true
+		}
+	}
+	switch alias {
+	case "UserTopSection":
+		for _, section := range sections {
+			if section.ID == "user_top" {
+				return section, true
+			}
+		}
+	case "UserBottomSection":
+		for _, section := range sections {
+			if section.ID == "notes" {
+				return section, true
+			}
+		}
+	}
+	return wikiManualSection{}, false
+}
+
+func renderWikiManualSection(section wikiManualSection) string {
+	return strings.Join([]string{
+		"<!-- sow-topdata-wiki:manual:start id=\"" + html.EscapeString(section.ID) + "\" -->",
+		strings.TrimSpace(section.InitialHTML),
+		"<!-- sow-topdata-wiki:manual:end id=\"" + html.EscapeString(section.ID) + "\" -->",
+	}, "\n")
+}
+
+func (ctx *wikiContext) renderExplicitWikiField(path, spec string, page wikiTemplatePage) (string, error) {
+	fieldSpec, defaultValue, hasDefault := strings.Cut(spec, "|default=")
+	fieldSpec = strings.TrimSpace(fieldSpec)
+	value, ok := ctx.resolveWikiTemplateField(fieldSpec, page)
+	if !ok {
+		if hasDefault {
+			return html.EscapeString(defaultValue), nil
+		}
+		return "", fmt.Errorf("render wiki template %s for %s: missing field %q", path, page.PageID, fieldSpec)
+	}
+	return html.EscapeString(value), nil
+}
+
+func (ctx *wikiContext) renderRequiredWikiField(path, fieldSpec string, page wikiTemplatePage) (string, error) {
+	value, ok := ctx.resolveWikiTemplateField(fieldSpec, page)
+	if !ok {
+		return "", fmt.Errorf("render wiki template %s for %s: missing field %q", path, page.PageID, fieldSpec)
+	}
+	return html.EscapeString(value), nil
+}
+
+func (ctx *wikiContext) resolveWikiTemplateField(fieldSpec string, page wikiTemplatePage) (string, bool) {
+	fieldSpec = strings.TrimSpace(fieldSpec)
+	if strings.HasSuffix(fieldSpec, ".text") {
+		base := strings.TrimSuffix(fieldSpec, ".text")
+		value, ok := lookupField(page.Row, base)
+		if !ok {
+			return "", false
+		}
+		text := ctx.resolveTextValue(value, nil)
+		return text, text != ""
+	}
+	value, ok := lookupField(page.Row, fieldSpec)
+	if !ok || value == nil {
+		return "", false
+	}
+	switch typed := value.(type) {
+	case string:
+		if typed == "" || typed == nullValue {
+			return "", false
+		}
+		return typed, true
+	case int:
+		return fmt.Sprintf("%d", typed), true
+	case float64:
+		return fmt.Sprintf("%d", int(typed)), true
+	default:
+		text := ctx.resolveTextValue(typed, nil)
+		return text, text != ""
+	}
+}