feat: add skill specializations and knowledge/language skill categories (Closes #94) (#136)

sharedUI/src/commonMain/composeResources/values/strings.xml

@@ -137,6 +137,38 @@
     <string name="talent_min_rating_error">Minimum rating is 0</string>
     <string name="talent_max_rating_error">Maximum rating is %1$d</string>
 
+    <!-- Skill categories -->
+    <string name="skill_category_active">Active Skills</string>
+    <string name="skill_category_knowledge">Knowledge Skills</string>
+    <string name="skill_category_language">Language Skills</string>
+    <string name="skill_specialization_label">Specialization (optional)</string>
+    <string name="skill_specialization_placeholder">e.g., Pistols</string>
+    <string name="skill_roll_with_spec">Roll with specialization (+2)</string>
+    <string name="skill_roll_without_spec">Roll without specialization</string>
+    <string name="skill_untrained_default">Untrained (default)</string>
+    <string name="skill_add_knowledge">Add Knowledge Skill</string>
+    <string name="skill_add_language">Add Language Skill</string>
+    <string name="skill_knowledge_category_label">Category</string>
+    <string name="skill_language_proficiency_label">Proficiency</string>
+    <string name="skill_add_knowledge_title">Add Knowledge Skill</string>
+    <string name="skill_add_language_title">Add Language Skill</string>
+    <string name="skill_name_label">Skill Name</string>
+    <string name="skill_name_placeholder">e.g., Corporate Politics</string>
+    <string name="skill_language_name_placeholder">e.g., Japanese</string>
+    <string name="skill_remove_content_desc">Remove skill</string>
+
+    <!-- Knowledge categories -->
+    <string name="knowledge_academic">Academic</string>
+    <string name="knowledge_interest">Interest</string>
+    <string name="knowledge_professional">Professional</string>
+    <string name="knowledge_street">Street</string>
+
+    <!-- Language proficiencies -->
+    <string name="language_basic">Basic</string>
+    <string name="language_specialist">Specialist</string>
+    <string name="language_expert">Expert</string>
+    <string name="language_native">Native</string>
+
     <!-- Dice roll content descriptions -->
     <string name="roll_dice_content_desc">Roll dice</string>
 

sharedUI/src/commonMain/kotlin/org/shahondin1624/lib/components/TestTags.kt

@@ -64,6 +64,24 @@ object TestTags {
     const val TALENT_EDIT_CONFIRM = "talent_edit_confirm"
     const val TALENT_EDIT_DISMISS = "talent_edit_dismiss"
     const val TALENT_EDIT_ERROR = "talent_edit_error"
+    const val TALENT_EDIT_SPECIALIZATION = "talent_edit_specialization"
+
+    // --- Knowledge/Language skill dialogs ---
+    const val KNOWLEDGE_SKILL_ADD_DIALOG = "knowledge_skill_add_dialog"
+    const val KNOWLEDGE_SKILL_NAME_INPUT = "knowledge_skill_name_input"
+    const val KNOWLEDGE_SKILL_CATEGORY = "knowledge_skill_category"
+    const val KNOWLEDGE_SKILL_CONFIRM = "knowledge_skill_confirm"
+    const val KNOWLEDGE_SKILL_DISMISS = "knowledge_skill_dismiss"
+    const val KNOWLEDGE_SKILL_ADD_BUTTON = "knowledge_skill_add_button"
+
+    const val LANGUAGE_SKILL_ADD_DIALOG = "language_skill_add_dialog"
+    const val LANGUAGE_SKILL_NAME_INPUT = "language_skill_name_input"
+    const val LANGUAGE_SKILL_PROFICIENCY = "language_skill_proficiency"
+    const val LANGUAGE_SKILL_CONFIRM = "language_skill_confirm"
+    const val LANGUAGE_SKILL_DISMISS = "language_skill_dismiss"
+    const val LANGUAGE_SKILL_ADD_BUTTON = "language_skill_add_button"
+
+    fun skillRemoveButton(name: String): String = "skill_remove_${name.lowercase().replace(" ", "_")}"
 
     // --- Dice roll result dialog ---
     const val DICE_ROLL_DIALOG = "dice_roll_dialog"

sharedUI/src/commonMain/kotlin/org/shahondin1624/lib/components/charactermodel/CharacterSheetPage.kt

@@ -7,14 +7,20 @@ import androidx.compose.material3.*
 import androidx.compose.runtime.*
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
+import androidx.compose.ui.platform.testTag
 import androidx.compose.ui.unit.Dp
 import androidx.compose.ui.unit.dp
+import org.shahondin1624.lib.components.TestTags
 import org.shahondin1624.lib.components.UiConstants
 import org.shahondin1624.lib.components.charactermodel.attributespage.Attribute
 import org.shahondin1624.lib.components.charactermodel.attributespage.AttributeEditDialog
 import org.shahondin1624.lib.components.charactermodel.attributespage.Talent
 import org.shahondin1624.lib.components.charactermodel.attributespage.TalentEditDialog
 import org.shahondin1624.model.talents.TalentDefinition
+import org.shahondin1624.model.talents.createKnowledgeSkill
+import org.shahondin1624.model.talents.createLanguageSkill
+import org.shahondin1624.lib.components.charactermodel.attributespage.KnowledgeSkillDialog
+import org.shahondin1624.lib.components.charactermodel.attributespage.LanguageSkillDialog
 import org.shahondin1624.lib.functions.DiceRoll
 import org.shahondin1624.lib.functions.performExtendedTest
 import org.shahondin1624.lib.functions.performOpposedTest
@@ -200,9 +206,11 @@ fun CharacterSheetPage(
     editingTalent?.let { talent ->
         TalentEditDialog(
             talent = talent,
-            onConfirm = { newValue ->
+            onConfirm = { newValue, specialization ->
                 onUpdateCharacter { char ->
-                    val newTalents = char.talents.withTalentRating(talent.name, newValue)
+                    val newTalents = char.talents.withTalentRatingAndSpecialization(
+                        talent.name, newValue, specialization
+                    )
                     char.copy(talents = newTalents)
                 }
                 editingTalent = null
@@ -257,7 +265,7 @@ fun CharacterSheetPage(
                 when (selectedTab) {
                     CharacterTab.Overview -> ExpandedOverviewContent(character, spacing, onEditCharacterData, onUpdateCharacter)
                     CharacterTab.Attributes -> AttributesContent(character, spacing, onDiceRoll, onEditAttribute)
-                    CharacterTab.Talents -> TalentsContent(character, spacing, onDiceRoll, onEditTalent)
+                    CharacterTab.Talents -> TalentsContent(character, spacing, onDiceRoll, onEditTalent, onUpdateCharacter)
                     CharacterTab.Magic -> MagicContent(character, spacing, onUpdateCharacter)
                     CharacterTab.Combat -> CombatContent(character, spacing, onUpdateCharacter)
                     CharacterTab.Gear -> GearContent(character, spacing, onUpdateCharacter)
@@ -268,7 +276,7 @@ fun CharacterSheetPage(
                 when (selectedTab) {
                     CharacterTab.Overview -> OverviewContent(character, spacing, onEditCharacterData, onUpdateCharacter)
                     CharacterTab.Attributes -> AttributesContent(character, spacing, onDiceRoll, onEditAttribute)
-                    CharacterTab.Talents -> TalentsContent(character, spacing, onDiceRoll, onEditTalent)
+                    CharacterTab.Talents -> TalentsContent(character, spacing, onDiceRoll, onEditTalent, onUpdateCharacter)
                     CharacterTab.Magic -> MagicContent(character, spacing, onUpdateCharacter)
                     CharacterTab.Combat -> CombatContent(character, spacing, onUpdateCharacter)
                     CharacterTab.Gear -> GearContent(character, spacing, onUpdateCharacter)
@@ -424,13 +432,43 @@ private fun TalentsContent(
     character: ShadowrunCharacter,
     spacing: Dp,
     onDiceRoll: (DiceRoll, String) -> Unit,
-    onEditTalent: (TalentDefinition) -> Unit
+    onEditTalent: (TalentDefinition) -> Unit,
+    onUpdateCharacter: ((ShadowrunCharacter) -> ShadowrunCharacter) -> Unit = {}
 ) {
     val windowSizeClass = LocalWindowSizeClass.current
     val totalCols = UiConstants.Grid.totalColumns(windowSizeClass)
     val talentSpan = UiConstants.Grid.talentSpan(windowSizeClass)
     val talentsPerRow = totalCols / talentSpan
 
+    var showAddKnowledgeDialog by remember { mutableStateOf(false) }
+    var showAddLanguageDialog by remember { mutableStateOf(false) }
+
+    if (showAddKnowledgeDialog) {
+        KnowledgeSkillDialog(
+            onConfirm = { name, category ->
+                onUpdateCharacter { char ->
+                    val newTalent = createKnowledgeSkill(name, category)
+                    char.copy(talents = char.talents.withAddedTalent(newTalent))
+                }
+                showAddKnowledgeDialog = false
+            },
+            onDismiss = { showAddKnowledgeDialog = false }
+        )
+    }
+
+    if (showAddLanguageDialog) {
+        LanguageSkillDialog(
+            onConfirm = { name, proficiency ->
+                onUpdateCharacter { char ->
+                    val newTalent = createLanguageSkill(name, proficiency)
+                    char.copy(talents = char.talents.withAddedTalent(newTalent))
+                }
+                showAddLanguageDialog = false
+            },
+            onDismiss = { showAddLanguageDialog = false }
+        )
+    }
+
     Column(
         modifier = Modifier
             .fillMaxSize()
@@ -438,9 +476,15 @@ private fun TalentsContent(
             .padding(spacing),
         verticalArrangement = Arrangement.spacedBy(spacing)
     ) {
-        val talents = character.talents.talents
+        // Active Skills section
-        val rows = talents.chunked(talentsPerRow)
+        Text(
-        for (row in rows) {
+            text = stringResource(Res.string.skill_category_active),
+            style = MaterialTheme.typography.titleMedium,
+            modifier = Modifier.padding(bottom = 4.dp)
+        )
+        val activeSkills = character.talents.activeSkills()
+        val activeRows = activeSkills.chunked(talentsPerRow)
+        for (row in activeRows) {
             Row(
                 modifier = Modifier.fillMaxWidth(),
                 horizontalArrangement = Arrangement.spacedBy(spacing)
@@ -460,6 +504,106 @@ private fun TalentsContent(
                 }
             }
         }
+
+        HorizontalDivider(modifier = Modifier.padding(vertical = spacing))
+
+        // Knowledge Skills section
+        Row(
+            modifier = Modifier.fillMaxWidth(),
+            horizontalArrangement = Arrangement.SpaceBetween,
+            verticalAlignment = Alignment.CenterVertically
+        ) {
+            Text(
+                text = stringResource(Res.string.skill_category_knowledge),
+                style = MaterialTheme.typography.titleMedium
+            )
+            TextButton(
+                onClick = { showAddKnowledgeDialog = true },
+                modifier = Modifier.testTag(TestTags.KNOWLEDGE_SKILL_ADD_BUTTON)
+            ) {
+                Text(stringResource(Res.string.skill_add_knowledge))
+            }
+        }
+        val knowledgeSkills = character.talents.knowledgeSkills()
+        if (knowledgeSkills.isEmpty()) {
+            Text(
+                text = "No knowledge skills",
+                style = MaterialTheme.typography.bodyMedium,
+                color = MaterialTheme.colorScheme.onSurfaceVariant
+            )
+        } else {
+            val knowledgeRows = knowledgeSkills.chunked(talentsPerRow)
+            for (row in knowledgeRows) {
+                Row(
+                    modifier = Modifier.fillMaxWidth(),
+                    horizontalArrangement = Arrangement.spacedBy(spacing)
+                ) {
+                    for (talent in row) {
+                        Box(modifier = Modifier.weight(1f)) {
+                            Talent(
+                                talent = talent,
+                                attributes = character.attributes,
+                                onRoll = { roll -> onDiceRoll(roll, talent.name) },
+                                onEdit = { onEditTalent(talent) }
+                            )
+                        }
+                    }
+                    repeat(talentsPerRow - row.size) {
+                        Spacer(Modifier.weight(1f))
+                    }
+                }
+            }
+        }
+
+        HorizontalDivider(modifier = Modifier.padding(vertical = spacing))
+
+        // Language Skills section
+        Row(
+            modifier = Modifier.fillMaxWidth(),
+            horizontalArrangement = Arrangement.SpaceBetween,
+            verticalAlignment = Alignment.CenterVertically
+        ) {
+            Text(
+                text = stringResource(Res.string.skill_category_language),
+                style = MaterialTheme.typography.titleMedium
+            )
+            TextButton(
+                onClick = { showAddLanguageDialog = true },
+                modifier = Modifier.testTag(TestTags.LANGUAGE_SKILL_ADD_BUTTON)
+            ) {
+                Text(stringResource(Res.string.skill_add_language))
+            }
+        }
+        val languageSkills = character.talents.languageSkills()
+        if (languageSkills.isEmpty()) {
+            Text(
+                text = "No language skills",
+                style = MaterialTheme.typography.bodyMedium,
+                color = MaterialTheme.colorScheme.onSurfaceVariant
+            )
+        } else {
+            val languageRows = languageSkills.chunked(talentsPerRow)
+            for (row in languageRows) {
+                Row(
+                    modifier = Modifier.fillMaxWidth(),
+                    horizontalArrangement = Arrangement.spacedBy(spacing)
+                ) {
+                    for (talent in row) {
+                        Box(modifier = Modifier.weight(1f)) {
+                            Talent(
+                                talent = talent,
+                                attributes = character.attributes,
+                                onRoll = { roll -> onDiceRoll(roll, talent.name) },
+                                onEdit = { onEditTalent(talent) }
+                            )
+                        }
+                    }
+                    repeat(talentsPerRow - row.size) {
+                        Spacer(Modifier.weight(1f))
+                    }
+                }
+            }
+        }
     }
 }
 

sharedUI/src/commonMain/kotlin/org/shahondin1624/lib/components/charactermodel/attributespage/KnowledgeSkillDialog.kt

@@ -0,0 +1,109 @@
+package org.shahondin1624.lib.components.charactermodel.attributespage
+
+import androidx.compose.foundation.layout.*
+import androidx.compose.material3.*
+import androidx.compose.runtime.*
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.platform.testTag
+import androidx.compose.ui.unit.dp
+import org.jetbrains.compose.resources.stringResource
+import org.shahondin1624.lib.components.TestTags
+import org.shahondin1624.model.talents.KnowledgeCategory
+import shadowruncharsheet.sharedui.generated.resources.Res
+import shadowruncharsheet.sharedui.generated.resources.*
+
+/**
+ * Dialog for adding a new knowledge skill.
+ */
+@OptIn(ExperimentalMaterial3Api::class)
+@Composable
+fun KnowledgeSkillDialog(
+    onConfirm: (name: String, category: KnowledgeCategory) -> Unit,
+    onDismiss: () -> Unit
+) {
+    var name by remember { mutableStateOf("") }
+    var selectedCategory by remember { mutableStateOf(KnowledgeCategory.ACADEMIC) }
+    var categoryExpanded by remember { mutableStateOf(false) }
+
+    val isValid = name.isNotBlank()
+
+    AlertDialog(
+        onDismissRequest = onDismiss,
+        modifier = Modifier.testTag(TestTags.KNOWLEDGE_SKILL_ADD_DIALOG),
+        title = {
+            Text(text = stringResource(Res.string.skill_add_knowledge_title))
+        },
+        text = {
+            Column(
+                verticalArrangement = Arrangement.spacedBy(8.dp)
+            ) {
+                OutlinedTextField(
+                    value = name,
+                    onValueChange = { name = it },
+                    label = { Text(stringResource(Res.string.skill_name_label)) },
+                    placeholder = { Text(stringResource(Res.string.skill_name_placeholder)) },
+                    singleLine = true,
+                    modifier = Modifier
+                        .fillMaxWidth()
+                        .testTag(TestTags.KNOWLEDGE_SKILL_NAME_INPUT)
+                )
+
+                ExposedDropdownMenuBox(
+                    expanded = categoryExpanded,
+                    onExpandedChange = { categoryExpanded = it },
+                    modifier = Modifier.testTag(TestTags.KNOWLEDGE_SKILL_CATEGORY)
+                ) {
+                    OutlinedTextField(
+                        value = knowledgeCategoryLabel(selectedCategory),
+                        onValueChange = {},
+                        readOnly = true,
+                        label = { Text(stringResource(Res.string.skill_knowledge_category_label)) },
+                        trailingIcon = { ExposedDropdownMenuDefaults.TrailingIcon(expanded = categoryExpanded) },
+                        modifier = Modifier.menuAnchor(MenuAnchorType.PrimaryNotEditable).fillMaxWidth()
+                    )
+                    ExposedDropdownMenu(
+                        expanded = categoryExpanded,
+                        onDismissRequest = { categoryExpanded = false }
+                    ) {
+                        KnowledgeCategory.entries.forEach { cat ->
+                            DropdownMenuItem(
+                                text = { Text(knowledgeCategoryLabel(cat)) },
+                                onClick = {
+                                    selectedCategory = cat
+                                    categoryExpanded = false
+                                }
+                            )
+                        }
+                    }
+                }
+            }
+        },
+        confirmButton = {
+            TextButton(
+                onClick = { if (isValid) onConfirm(name.trim(), selectedCategory) },
+                enabled = isValid,
+                modifier = Modifier.testTag(TestTags.KNOWLEDGE_SKILL_CONFIRM)
+            ) {
+                Text(stringResource(Res.string.create))
+            }
+        },
+        dismissButton = {
+            TextButton(
+                onClick = onDismiss,
+                modifier = Modifier.testTag(TestTags.KNOWLEDGE_SKILL_DISMISS)
+            ) {
+                Text(stringResource(Res.string.cancel))
+            }
+        }
+    )
+}
+
+@Composable
+fun knowledgeCategoryLabel(category: KnowledgeCategory): String {
+    return when (category) {
+        KnowledgeCategory.ACADEMIC -> stringResource(Res.string.knowledge_academic)
+        KnowledgeCategory.INTEREST -> stringResource(Res.string.knowledge_interest)
+        KnowledgeCategory.PROFESSIONAL -> stringResource(Res.string.knowledge_professional)
+        KnowledgeCategory.STREET -> stringResource(Res.string.knowledge_street)
+    }
+}

sharedUI/src/commonMain/kotlin/org/shahondin1624/lib/components/charactermodel/attributespage/LanguageSkillDialog.kt

@@ -0,0 +1,109 @@
+package org.shahondin1624.lib.components.charactermodel.attributespage
+
+import androidx.compose.foundation.layout.*
+import androidx.compose.material3.*
+import androidx.compose.runtime.*
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.platform.testTag
+import androidx.compose.ui.unit.dp
+import org.jetbrains.compose.resources.stringResource
+import org.shahondin1624.lib.components.TestTags
+import org.shahondin1624.model.talents.LanguageProficiency
+import shadowruncharsheet.sharedui.generated.resources.Res
+import shadowruncharsheet.sharedui.generated.resources.*
+
+/**
+ * Dialog for adding a new language skill.
+ */
+@OptIn(ExperimentalMaterial3Api::class)
+@Composable
+fun LanguageSkillDialog(
+    onConfirm: (name: String, proficiency: LanguageProficiency) -> Unit,
+    onDismiss: () -> Unit
+) {
+    var name by remember { mutableStateOf("") }
+    var selectedProficiency by remember { mutableStateOf(LanguageProficiency.BASIC) }
+    var proficiencyExpanded by remember { mutableStateOf(false) }
+
+    val isValid = name.isNotBlank()
+
+    AlertDialog(
+        onDismissRequest = onDismiss,
+        modifier = Modifier.testTag(TestTags.LANGUAGE_SKILL_ADD_DIALOG),
+        title = {
+            Text(text = stringResource(Res.string.skill_add_language_title))
+        },
+        text = {
+            Column(
+                verticalArrangement = Arrangement.spacedBy(8.dp)
+            ) {
+                OutlinedTextField(
+                    value = name,
+                    onValueChange = { name = it },
+                    label = { Text(stringResource(Res.string.skill_name_label)) },
+                    placeholder = { Text(stringResource(Res.string.skill_language_name_placeholder)) },
+                    singleLine = true,
+                    modifier = Modifier
+                        .fillMaxWidth()
+                        .testTag(TestTags.LANGUAGE_SKILL_NAME_INPUT)
+                )
+
+                ExposedDropdownMenuBox(
+                    expanded = proficiencyExpanded,
+                    onExpandedChange = { proficiencyExpanded = it },
+                    modifier = Modifier.testTag(TestTags.LANGUAGE_SKILL_PROFICIENCY)
+                ) {
+                    OutlinedTextField(
+                        value = languageProficiencyLabel(selectedProficiency),
+                        onValueChange = {},
+                        readOnly = true,
+                        label = { Text(stringResource(Res.string.skill_language_proficiency_label)) },
+                        trailingIcon = { ExposedDropdownMenuDefaults.TrailingIcon(expanded = proficiencyExpanded) },
+                        modifier = Modifier.menuAnchor(MenuAnchorType.PrimaryNotEditable).fillMaxWidth()
+                    )
+                    ExposedDropdownMenu(
+                        expanded = proficiencyExpanded,
+                        onDismissRequest = { proficiencyExpanded = false }
+                    ) {
+                        LanguageProficiency.entries.forEach { prof ->
+                            DropdownMenuItem(
+                                text = { Text(languageProficiencyLabel(prof)) },
+                                onClick = {
+                                    selectedProficiency = prof
+                                    proficiencyExpanded = false
+                                }
+                            )
+                        }
+                    }
+                }
+            }
+        },
+        confirmButton = {
+            TextButton(
+                onClick = { if (isValid) onConfirm(name.trim(), selectedProficiency) },
+                enabled = isValid,
+                modifier = Modifier.testTag(TestTags.LANGUAGE_SKILL_CONFIRM)
+            ) {
+                Text(stringResource(Res.string.create))
+            }
+        },
+        dismissButton = {
+            TextButton(
+                onClick = onDismiss,
+                modifier = Modifier.testTag(TestTags.LANGUAGE_SKILL_DISMISS)
+            ) {
+                Text(stringResource(Res.string.cancel))
+            }
+        }
+    )
+}
+
+@Composable
+fun languageProficiencyLabel(proficiency: LanguageProficiency): String {
+    return when (proficiency) {
+        LanguageProficiency.BASIC -> stringResource(Res.string.language_basic)
+        LanguageProficiency.SPECIALIST -> stringResource(Res.string.language_specialist)
+        LanguageProficiency.EXPERT -> stringResource(Res.string.language_expert)
+        LanguageProficiency.NATIVE -> stringResource(Res.string.language_native)
+    }
+}

sharedUI/src/commonMain/kotlin/org/shahondin1624/lib/components/charactermodel/attributespage/Talent.kt

@@ -11,10 +11,16 @@ import androidx.compose.foundation.layout.widthIn
 import androidx.compose.foundation.shape.RoundedCornerShape
 import androidx.compose.material3.Card
 import androidx.compose.material3.CardDefaults
+import androidx.compose.material3.DropdownMenu
+import androidx.compose.material3.DropdownMenuItem
 import androidx.compose.material3.IconButton
 import androidx.compose.material3.MaterialTheme
 import androidx.compose.material3.Text
 import androidx.compose.runtime.Composable
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
+import androidx.compose.runtime.setValue
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.draw.clip
@@ -30,6 +36,7 @@ import org.shahondin1624.lib.components.TestTags
 import org.shahondin1624.lib.components.UiConstants.SMALL_PADDING
 import org.shahondin1624.lib.functions.DiceRoll
 import org.shahondin1624.model.attributes.Attributes
+import org.shahondin1624.model.talents.Talent as TalentModel
 import org.shahondin1624.model.talents.TalentDefinition
 import org.shahondin1624.theme.contrastTextColor
 import shadowruncharsheet.sharedui.generated.resources.Res
@@ -76,6 +83,9 @@ private fun TalentCardContent(
     textColor: Color,
     onRoll: (DiceRoll) -> Unit
 ) {
+    var showSpecMenu by remember { mutableStateOf(false) }
+    val hasSpec = talent.specialization != null
+
     Row(
         verticalAlignment = Alignment.CenterVertically,
         horizontalArrangement = Arrangement.Start,
@@ -94,7 +104,7 @@ private fun TalentCardContent(
             verticalAlignment = Alignment.CenterVertically
         ) {
             Text(
-                text = talent.name,
+                text = if (talent is TalentModel) talent.displayName() else talent.name,
                 modifier = Modifier
                     .weight(1f)
                     .padding(start = SMALL_PADDING),
@@ -114,7 +124,11 @@ private fun TalentCardContent(
                 overflow = TextOverflow.Ellipsis
             )
             Text(
-                text = talent.value.toString(),
+                text = if (talent.value == 0) {
+                    stringResource(Res.string.skill_untrained_default)
+                } else {
+                    talent.value.toString()
+                },
                 modifier = Modifier
                     .widthIn(min = 24.dp)
                     .padding(end = SMALL_PADDING),
@@ -126,8 +140,16 @@ private fun TalentCardContent(
         }
         IconButton(
             onClick = {
-                val result = talent.test(modifiers = emptyList(), attributes = attributes)
+                if (hasSpec) {
-                onRoll(result)
+                    showSpecMenu = true
+                } else {
+                    val result = talent.test(
+                        modifiers = emptyList(),
+                        attributes = attributes,
+                        withSpecialization = false
+                    )
+                    onRoll(result)
+                }
             },
             modifier = Modifier
                 .padding(end = SMALL_PADDING)
@@ -141,6 +163,35 @@ private fun TalentCardContent(
                 ),
                 modifier = Modifier.size(24.dp)
             )
+            DropdownMenu(
+                expanded = showSpecMenu,
+                onDismissRequest = { showSpecMenu = false }
+            ) {
+                DropdownMenuItem(
+                    text = { Text(stringResource(Res.string.skill_roll_without_spec)) },
+                    onClick = {
+                        showSpecMenu = false
+                        val result = talent.test(
+                            modifiers = emptyList(),
+                            attributes = attributes,
+                            withSpecialization = false
+                        )
+                        onRoll(result)
+                    }
+                )
+                DropdownMenuItem(
+                    text = { Text(stringResource(Res.string.skill_roll_with_spec)) },
+                    onClick = {
+                        showSpecMenu = false
+                        val result = talent.test(
+                            modifiers = emptyList(),
+                            attributes = attributes,
+                            withSpecialization = true
+                        )
+                        onRoll(result)
+                    }
+                )
+            }
         }
     }
 }

sharedUI/src/commonMain/kotlin/org/shahondin1624/lib/components/charactermodel/attributespage/TalentEditDialog.kt

@@ -15,17 +15,18 @@ import shadowruncharsheet.sharedui.generated.resources.Res
 import shadowruncharsheet.sharedui.generated.resources.*
 
 /**
- * Dialog for editing a talent's rating.
+ * Dialog for editing a talent's rating and optional specialization.
  * Rating range is 0-12; 0 means untrained.
  */
 @Composable
 fun TalentEditDialog(
     talent: TalentDefinition,
     maxValue: Int = 12,
-    onConfirm: (Int) -> Unit,
+    onConfirm: (Int, String?) -> Unit,
     onDismiss: () -> Unit
 ) {
     var textValue by remember { mutableStateOf(talent.value.toString()) }
+    var specValue by remember { mutableStateOf(talent.specialization ?: "") }
     val parsedValue = textValue.toIntOrNull()
     val isValid = parsedValue != null && parsedValue in 0..maxValue
 
@@ -68,11 +69,27 @@ fun TalentEditDialog(
                         modifier = Modifier.testTag(TestTags.TALENT_EDIT_ERROR)
                     )
                 }
+
+                OutlinedTextField(
+                    value = specValue,
+                    onValueChange = { specValue = it },
+                    label = { Text(stringResource(Res.string.skill_specialization_label)) },
+                    placeholder = { Text(stringResource(Res.string.skill_specialization_placeholder)) },
+                    singleLine = true,
+                    modifier = Modifier
+                        .fillMaxWidth()
+                        .testTag(TestTags.TALENT_EDIT_SPECIALIZATION)
+                )
             }
         },
         confirmButton = {
             TextButton(
-                onClick = { if (isValid) onConfirm(parsedValue!!) },
+                onClick = {
+                    if (isValid) {
+                        val spec = specValue.takeIf { it.isNotBlank() }
+                        onConfirm(parsedValue!!, spec)
+                    }
+                },
                 enabled = isValid,
                 modifier = Modifier.testTag(TestTags.TALENT_EDIT_CONFIRM)
             ) {

sharedUI/src/commonMain/kotlin/org/shahondin1624/model/migration/MigrationRegistry.kt

@@ -13,7 +13,8 @@ object MigrationRegistry {
     private val migrations: List<VersionMigration> = listOf(
         MigrationV01ToV02(),
         MigrationV02ToV03(),
-        MigrationV03ToV04()
+        MigrationV03ToV04(),
+        MigrationV04ToV05()
     )
 
     /**

sharedUI/src/commonMain/kotlin/org/shahondin1624/model/migration/MigrationV04ToV05.kt

@@ -0,0 +1,77 @@
+package org.shahondin1624.model.migration
+
+import kotlinx.serialization.json.*
+
+/**
+ * Migration from schema v0.4 to v0.5.
+ *
+ * Changes in v0.5:
+ * - Adds "specialization" field (null) to all talent entries
+ * - Adds "category" field ("ACTIVE") to all talent entries
+ * - Adds "knowledgeCategory" field (null) to all talent entries
+ * - Adds "languageProficiency" field (null) to all talent entries
+ * - Updates all version fields from "v0.4" to "v0.5"
+ */
+class MigrationV04ToV05 : VersionMigration {
+    override val fromVersion: String = SchemaVersion.V0_4
+    override val toVersion: String = SchemaVersion.V0_5
+
+    override fun migrate(json: JsonObject): JsonObject {
+        val mutable = json.toMutableMap()
+
+        // Migrate talent entries to add new fields
+        val talents = mutable["talents"]
+        if (talents is JsonObject) {
+            val talentsMutable = talents.toMutableMap()
+            val talentList = talentsMutable["talents"]
+            if (talentList is JsonArray) {
+                val migratedTalents = talentList.map { talentElement ->
+                    if (talentElement is JsonObject) {
+                        migrateTalent(talentElement)
+                    } else {
+                        talentElement
+                    }
+                }
+                talentsMutable["talents"] = JsonArray(migratedTalents)
+            }
+            talentsMutable["version"] = JsonPrimitive(toVersion)
+            mutable["talents"] = JsonObject(talentsMutable)
+        }
+
+        // Update version fields at all levels
+        mutable["version"] = JsonPrimitive(toVersion)
+        mutable.updateNestedVersion("characterData")
+        mutable.updateNestedVersion("attributes")
+        mutable.updateNestedVersion("damageMonitor")
+
+        return JsonObject(mutable)
+    }
+
+    private fun migrateTalent(talent: JsonObject): JsonObject {
+        val mutable = talent.toMutableMap()
+
+        if ("specialization" !in mutable) {
+            mutable["specialization"] = JsonNull
+        }
+        if ("category" !in mutable) {
+            mutable["category"] = JsonPrimitive("ACTIVE")
+        }
+        if ("knowledgeCategory" !in mutable) {
+            mutable["knowledgeCategory"] = JsonNull
+        }
+        if ("languageProficiency" !in mutable) {
+            mutable["languageProficiency"] = JsonNull
+        }
+
+        return JsonObject(mutable)
+    }
+
+    private fun MutableMap<String, JsonElement>.updateNestedVersion(key: String) {
+        val nested = this[key]
+        if (nested is JsonObject) {
+            val nestedMutable = nested.toMutableMap()
+            nestedMutable["version"] = JsonPrimitive(toVersion)
+            this[key] = JsonObject(nestedMutable)
+        }
+    }
+}

sharedUI/src/commonMain/kotlin/org/shahondin1624/model/migration/SchemaVersion.kt

@@ -5,7 +5,7 @@ package org.shahondin1624.model.migration
  * as their default version value.
  */
 object SchemaVersion {
-    const val CURRENT: String = "v0.4"
+    const val CURRENT: String = "v0.5"
 
     /**
      * Initial version used before the migration system was introduced.
@@ -17,4 +17,6 @@ object SchemaVersion {
     const val V0_3: String = "v0.3"
 
     const val V0_4: String = "v0.4"
+
+    const val V0_5: String = "v0.5"
 }

sharedUI/src/commonMain/kotlin/org/shahondin1624/model/talents/KnowledgeCategory.kt

@@ -0,0 +1,14 @@
+package org.shahondin1624.model.talents
+
+import kotlinx.serialization.Serializable
+
+/**
+ * Sub-categories for knowledge skills in Shadowrun 5e.
+ */
+@Serializable
+enum class KnowledgeCategory {
+    ACADEMIC,
+    INTEREST,
+    PROFESSIONAL,
+    STREET
+}

sharedUI/src/commonMain/kotlin/org/shahondin1624/model/talents/LanguageProficiency.kt

@@ -0,0 +1,14 @@
+package org.shahondin1624.model.talents
+
+import kotlinx.serialization.Serializable
+
+/**
+ * Proficiency levels for language skills in Shadowrun 5e.
+ */
+@Serializable
+enum class LanguageProficiency {
+    BASIC,
+    SPECIALIST,
+    EXPERT,
+    NATIVE
+}

sharedUI/src/commonMain/kotlin/org/shahondin1624/model/talents/SkillCategory.kt

@@ -0,0 +1,16 @@
+package org.shahondin1624.model.talents
+
+import kotlinx.serialization.Serializable
+
+/**
+ * Categorizes skills according to Shadowrun 5e rules.
+ * - ACTIVE: Combat, social, technical, vehicle, and magical skills
+ * - KNOWLEDGE: Academic, interest, professional, and street knowledge
+ * - LANGUAGE: Language skills with proficiency levels
+ */
+@Serializable
+enum class SkillCategory {
+    ACTIVE,
+    KNOWLEDGE,
+    LANGUAGE
+}

sharedUI/src/commonMain/kotlin/org/shahondin1624/model/talents/Talent.kt

@@ -15,11 +15,42 @@ data class Talent(
     override val attribute: AttributeType,
     override val value: Int,
     override val custom: Boolean,
+    override val specialization: String? = null,
+    override val category: SkillCategory = SkillCategory.ACTIVE,
+    override val knowledgeCategory: KnowledgeCategory? = null,
+    override val languageProficiency: LanguageProficiency? = null,
 ): TalentDefinition {
-    override fun test(modifiers: List<SRModifier<*>>, attributes: Attributes): DiceRoll {
+    override fun test(
+        modifiers: List<SRModifier<*>>,
+        attributes: Attributes,
+        withSpecialization: Boolean
+    ): DiceRoll {
         val attributeValue = attributes.getAttributeByType(attribute).value
-        val combined = value + attributeValue
+        val specBonus = if (withSpecialization && specialization != null) 2 else 0
-        return modifiers.accumulateModifiers(DiceRoll(numberOfDice = combined)).roll()
+        val pool = if (value == 0) {
+            defaultPool(attributes)
+        } else {
+            value + attributeValue + specBonus
+        }
+        return modifiers.accumulateModifiers(DiceRoll(numberOfDice = pool.coerceAtLeast(0))).roll()
+    }
+
+    override fun defaultPool(attributes: Attributes): Int {
+        return when (category) {
+            SkillCategory.ACTIVE -> {
+                (attributes.getAttributeByType(attribute).value - 1).coerceAtLeast(0)
+            }
+            SkillCategory.KNOWLEDGE, SkillCategory.LANGUAGE -> {
+                (attributes.getAttributeByType(AttributeType.Intuition).value - 1).coerceAtLeast(0)
+            }
+        }
+    }
+
+    /**
+     * Display name including specialization, e.g., "Firearms (Pistols)"
+     */
+    fun displayName(): String {
+        return if (specialization != null) "$name ($specialization)" else name
     }
 }
 
@@ -27,11 +58,38 @@ private fun createProvidedTalent(provided: ProvidedTalentName, value: Int = 0) =
     name = provided.name.replace("_", " "),
     attribute = provided.attribute,
     value = value,
-    custom = false
+    custom = false,
+    category = SkillCategory.ACTIVE
 )
 
 fun createAllProvidedTalents() = ProvidedTalentName.entries.map {
     createProvidedTalent(it)
 }
 
-fun createCustomTalent(name: String, attribute: AttributeType, value: Int = 0) = Talent(name, attribute, value, true)
+fun createCustomTalent(name: String, attribute: AttributeType, value: Int = 0) = Talent(name, attribute, value, true)
+
+fun createKnowledgeSkill(
+    name: String,
+    knowledgeCategory: KnowledgeCategory,
+    value: Int = 0
+) = Talent(
+    name = name,
+    attribute = AttributeType.Intuition,
+    value = value,
+    custom = true,
+    category = SkillCategory.KNOWLEDGE,
+    knowledgeCategory = knowledgeCategory
+)
+
+fun createLanguageSkill(
+    name: String,
+    proficiency: LanguageProficiency,
+    value: Int = 0
+) = Talent(
+    name = name,
+    attribute = AttributeType.Intuition,
+    value = value,
+    custom = true,
+    category = SkillCategory.LANGUAGE,
+    languageProficiency = proficiency
+)

sharedUI/src/commonMain/kotlin/org/shahondin1624/model/talents/TalentDefinition.kt

@@ -12,5 +12,25 @@ sealed interface TalentDefinition {
     val attribute: AttributeType
     val value: Int
     val custom: Boolean
-    fun test(modifiers: List<SRModifier<*>>, attributes: Attributes): DiceRoll
+    val specialization: String?
-}
+    val category: SkillCategory
+    val knowledgeCategory: KnowledgeCategory?
+    val languageProficiency: LanguageProficiency?
+
+    /**
+     * Roll a skill test. When [withSpecialization] is true and a specialization
+     * is set, adds +2 dice to the pool per Shadowrun 5e rules.
+     */
+    fun test(
+        modifiers: List<SRModifier<*>>,
+        attributes: Attributes,
+        withSpecialization: Boolean = false
+    ): DiceRoll
+
+    /**
+     * Calculate the default dice pool for an untrained test (skill rating 0).
+     * Active skills: linked attribute - 1 (minimum 0).
+     * Knowledge/Language skills: Intuition - 1 (minimum 0).
+     */
+    fun defaultPool(attributes: Attributes): Int
+}

sharedUI/src/commonMain/kotlin/org/shahondin1624/model/talents/Talents.kt

@@ -16,11 +16,39 @@ data class Talents(
         return copy(
             talents = talents.map { talent ->
                 if (talent.name == talentName) {
-                    Talent(
+                    (talent as Talent).copy(value = newValue)
-                        name = talent.name,
+                } else {
-                        attribute = talent.attribute,
+                    talent
+                }
+            }
+        )
+    }
+
+    /**
+     * Returns a copy with the specified talent's specialization updated.
+     */
+    fun withTalentSpecialization(talentName: String, specialization: String?): Talents {
+        return copy(
+            talents = talents.map { talent ->
+                if (talent.name == talentName) {
+                    (talent as Talent).copy(specialization = specialization?.takeIf { it.isNotBlank() })
+                } else {
+                    talent
+                }
+            }
+        )
+    }
+
+    /**
+     * Returns a copy with the specified talent's rating and specialization updated together.
+     */
+    fun withTalentRatingAndSpecialization(talentName: String, newValue: Int, specialization: String?): Talents {
+        return copy(
+            talents = talents.map { talent ->
+                if (talent.name == talentName) {
+                    (talent as Talent).copy(
                         value = newValue,
-                        custom = talent.custom
+                        specialization = specialization?.takeIf { it.isNotBlank() }
                     )
                 } else {
                     talent
@@ -28,4 +56,27 @@ data class Talents(
             }
         )
     }
+
+    /**
+     * Adds a new talent (knowledge or language skill) to the list.
+     */
+    fun withAddedTalent(talent: TalentDefinition): Talents {
+        return copy(talents = talents + talent)
+    }
+
+    /**
+     * Removes a talent by name. Only custom talents can be removed.
+     */
+    fun withRemovedTalent(talentName: String): Talents {
+        return copy(talents = talents.filter { it.name != talentName || !it.custom })
+    }
+
+    /** All active skills (the default Shadowrun skill list). */
+    fun activeSkills(): List<TalentDefinition> = talents.filter { it.category == SkillCategory.ACTIVE }
+
+    /** All knowledge skills. */
+    fun knowledgeSkills(): List<TalentDefinition> = talents.filter { it.category == SkillCategory.KNOWLEDGE }
+
+    /** All language skills. */
+    fun languageSkills(): List<TalentDefinition> = talents.filter { it.category == SkillCategory.LANGUAGE }
 }

sharedUI/src/commonTest/kotlin/org/shahondin1624/VersionMigrationTest.kt

@@ -132,13 +132,15 @@ class VersionMigrationTest {
     @Test
     fun findMigrationChainReturnsPathFromV01() {
         val chain = MigrationRegistry.findMigrationChain("v0.1")
-        assertEquals(3, chain.size)
+        assertEquals(4, chain.size)
         assertEquals("v0.1", chain[0].fromVersion)
         assertEquals("v0.2", chain[0].toVersion)
         assertEquals("v0.2", chain[1].fromVersion)
         assertEquals("v0.3", chain[1].toVersion)
         assertEquals("v0.3", chain[2].fromVersion)
         assertEquals("v0.4", chain[2].toVersion)
+        assertEquals("v0.4", chain[3].fromVersion)
+        assertEquals("v0.5", chain[3].toVersion)
     }
 
     @Test