diff --git a/RolemasterDB.slnx b/RolemasterDB.slnx
index 04b786c..a2e0211 100644
--- a/RolemasterDB.slnx
+++ b/RolemasterDB.slnx
@@ -1,6 +1,7 @@
 <Solution>
   <Folder Name="/src/">
     <Project Path="src/RolemasterDb.App/RolemasterDb.App.csproj" />
+    <Project Path="src/RolemasterDb.CriticalParsing/RolemasterDb.CriticalParsing.csproj" />
     <Project Path="src/RolemasterDb.ImportTool/RolemasterDb.ImportTool.csproj" />
     <Project Path="src/RolemasterDb.ImportTool.Tests/RolemasterDb.ImportTool.Tests.csproj" />
   </Folder>
diff --git a/docs/player_gm_ux_redesign_plan.md b/docs/player_gm_ux_redesign_plan.md
index d906041..7d883f7 100644
--- a/docs/player_gm_ux_redesign_plan.md
+++ b/docs/player_gm_ux_redesign_plan.md
@@ -550,6 +550,10 @@ Acceptance criteria:
 
 ### Phase 4: Shared parsing assembly
 
+Status:
+
+- implemented in the web app on March 15, 2026
+
 Scope:
 
 - extract shared parser/normalizer logic from the import tool
diff --git a/src/RolemasterDb.App/Components/Pages/Api.razor b/src/RolemasterDb.App/Components/Pages/Api.razor
index a58e80b..b773958 100644
--- a/src/RolemasterDb.App/Components/Pages/Api.razor
+++ b/src/RolemasterDb.App/Components/Pages/Api.razor
@@ -60,12 +60,22 @@
   "rawAffixText": "+8H - 2S",
   "parseStatus": "verified",
   "parsedJson": "{}",
+  "validationMessages": [],
   "effects": [],
   "branches": []
 }</pre>
         <p class="panel-copy">Use this to retrieve the full editable result graph for one critical-table cell, including nested branches and normalized effects.</p>
     </section>
 
+    <section class="panel">
+        <h2 class="panel-title">Cell re-parse</h2>
+        <p class="panel-copy"><code>POST /api/tables/critical/{slug}/cells/{resultId}/reparse</code></p>
+        <pre class="code-block">{
+  "rawCellText": "Strike to thigh. +8H\nWith greaves: blow glances aside."
+}</pre>
+        <p class="panel-copy">Re-runs the shared single-cell parser and returns a refreshed editor payload without saving changes.</p>
+    </section>
+
     <section class="panel">
         <h2 class="panel-title">Cell editor save</h2>
         <p class="panel-copy"><code>PUT /api/tables/critical/{slug}/cells/{resultId}</code></p>
diff --git a/src/RolemasterDb.App/Components/Pages/Tables.razor b/src/RolemasterDb.App/Components/Pages/Tables.razor
index 715158b..c45e160 100644
--- a/src/RolemasterDb.App/Components/Pages/Tables.razor
+++ b/src/RolemasterDb.App/Components/Pages/Tables.razor
@@ -207,10 +207,13 @@
     <CriticalCellEditorDialog
         Model="editorModel"
         IsLoading="isEditorLoading"
+        IsReparsing="isEditorReparsing"
         IsSaving="isEditorSaving"
         LoadErrorMessage="@editorLoadError"
+        ReparseErrorMessage="@editorReparseError"
         SaveErrorMessage="@editorSaveError"
         OnClose="CloseCellEditorAsync"
+        OnReparse="ReparseCellEditorAsync"
         OnSave="SaveCellEditorAsync" />
 }
 
@@ -227,8 +230,10 @@
     private bool IsTableSelectionDisabled => isReferenceDataLoading || (referenceData?.CriticalTables.Count ?? 0) == 0;
     private bool isEditorOpen;
     private bool isEditorLoading;
+    private bool isEditorReparsing;
     private bool isEditorSaving;
     private string? editorLoadError;
+    private string? editorReparseError;
     private string? editorSaveError;
     private int? editingResultId;
     private CriticalCellEditorModel? editorModel;
@@ -328,9 +333,11 @@
         }
 
         editorLoadError = null;
+        editorReparseError = null;
         editorSaveError = null;
         editorModel = null;
         editingResultId = resultId;
+        isEditorReparsing = false;
         isEditorSaving = false;
         isEditorLoading = true;
         isEditorOpen = true;
@@ -362,14 +369,47 @@
     {
         isEditorOpen = false;
         isEditorLoading = false;
+        isEditorReparsing = false;
         isEditorSaving = false;
         editorLoadError = null;
+        editorReparseError = null;
         editorSaveError = null;
         editingResultId = null;
         editorModel = null;
         await InvokeAsync(StateHasChanged);
     }
 
+    private async Task ReparseCellEditorAsync()
+    {
+        if (editorModel is null || string.IsNullOrWhiteSpace(selectedTableSlug) || editingResultId is null)
+        {
+            return;
+        }
+
+        isEditorReparsing = true;
+        editorReparseError = null;
+
+        try
+        {
+            var response = await LookupService.ReparseCriticalCellAsync(selectedTableSlug, editingResultId.Value, editorModel.RawCellText);
+            if (response is null)
+            {
+                editorReparseError = "The selected cell could not be re-parsed.";
+                return;
+            }
+
+            editorModel = CriticalCellEditorModel.FromResponse(response);
+        }
+        catch (Exception exception)
+        {
+            editorReparseError = exception.Message;
+        }
+        finally
+        {
+            isEditorReparsing = false;
+        }
+    }
+
     private async Task SaveCellEditorAsync()
     {
         if (editorModel is null || string.IsNullOrWhiteSpace(selectedTableSlug) || editingResultId is null)
diff --git a/src/RolemasterDb.App/Components/Shared/CriticalBranchEditorModel.cs b/src/RolemasterDb.App/Components/Shared/CriticalBranchEditorModel.cs
index 20a8f31..f1f9cfe 100644
--- a/src/RolemasterDb.App/Components/Shared/CriticalBranchEditorModel.cs
+++ b/src/RolemasterDb.App/Components/Shared/CriticalBranchEditorModel.cs
@@ -1,3 +1,4 @@
+using System.Text.Json;
 using RolemasterDb.App.Features;
 
 namespace RolemasterDb.App.Components.Shared;
@@ -35,11 +36,32 @@ public sealed class CriticalBranchEditorModel
             BranchKind,
             ConditionKey,
             ConditionText,
-            ConditionJson,
-            RawText,
+            "{}",
+            BuildRawText(),
             DescriptionText,
             RawAffixText,
-            ParsedJson,
+            SerializeParsedEffects(Effects),
             SortOrder,
             Effects.Select(effect => effect.ToItem()).ToList());
+
+    private string BuildRawText()
+    {
+        var condition = ConditionText.Trim();
+        var description = DescriptionText.Trim();
+        var firstLine = string.IsNullOrWhiteSpace(description)
+            ? $"{condition}:"
+            : $"{condition}: {description}";
+
+        if (string.IsNullOrWhiteSpace(RawAffixText))
+        {
+            return firstLine;
+        }
+
+        return $"{firstLine}{Environment.NewLine}{RawAffixText.Trim()}";
+    }
+
+    private static string SerializeParsedEffects(IReadOnlyList<CriticalEffectEditorModel> effects) =>
+        effects.Count == 0
+            ? "{}"
+            : JsonSerializer.Serialize(new { effects = effects.Select(effect => effect.ToItem()).ToList() });
 }
diff --git a/src/RolemasterDb.App/Components/Shared/CriticalCellEditorDialog.razor b/src/RolemasterDb.App/Components/Shared/CriticalCellEditorDialog.razor
index 3ef634b..85de648 100644
--- a/src/RolemasterDb.App/Components/Shared/CriticalCellEditorDialog.razor
+++ b/src/RolemasterDb.App/Components/Shared/CriticalCellEditorDialog.razor
@@ -45,6 +45,11 @@
         {
             <EditForm Model="Model" OnSubmit="HandleSubmitAsync" class="critical-editor-form">
                 <div class="critical-editor-body">
+                    @if (!string.IsNullOrWhiteSpace(ReparseErrorMessage))
+                    {
+                        <p class="error-text critical-editor-error">@ReparseErrorMessage</p>
+                    }
+
                     @if (!string.IsNullOrWhiteSpace(SaveErrorMessage))
                     {
                         <p class="error-text critical-editor-error">@SaveErrorMessage</p>
@@ -79,11 +84,23 @@
                                 <h4>Raw Text</h4>
                                 <p class="muted">Update the source text, then adjust the visible card fields below.</p>
                             </div>
+                            <button type="button" class="btn-ritual" @onclick="OnReparse" disabled="@IsSaving || IsReparsing">
+                                @(IsReparsing ? "Re-Parsing..." : "Re-Parse Raw Text")
+                            </button>
                         </div>
                         <div class="field-shell">
                             <label>Raw Cell Text</label>
                             <InputTextArea class="input-shell critical-editor-textarea tall" @bind-Value="Model.RawCellText" />
                         </div>
+                        @if (Model.ValidationMessages.Count > 0)
+                        {
+                            <div class="critical-editor-validation-list">
+                                @foreach (var message in Model.ValidationMessages)
+                                {
+                                    <p class="critical-editor-validation-item">@message</p>
+                                }
+                            </div>
+                        }
                         <div class="field-shell">
                             <label>Result Text Override</label>
                             <InputTextArea class="input-shell critical-editor-textarea compact" @bind-Value="Model.DescriptionText" />
@@ -231,18 +248,27 @@
     [Parameter]
     public bool IsLoading { get; set; }
 
+    [Parameter]
+    public bool IsReparsing { get; set; }
+
     [Parameter]
     public bool IsSaving { get; set; }
 
     [Parameter]
     public string? LoadErrorMessage { get; set; }
 
+    [Parameter]
+    public string? ReparseErrorMessage { get; set; }
+
     [Parameter]
     public string? SaveErrorMessage { get; set; }
 
     [Parameter, EditorRequired]
     public EventCallback OnClose { get; set; }
 
+    [Parameter, EditorRequired]
+    public EventCallback OnReparse { get; set; }
+
     [Parameter, EditorRequired]
     public EventCallback OnSave { get; set; }
 
diff --git a/src/RolemasterDb.App/Components/Shared/CriticalCellEditorModel.cs b/src/RolemasterDb.App/Components/Shared/CriticalCellEditorModel.cs
index b6859ba..184f852 100644
--- a/src/RolemasterDb.App/Components/Shared/CriticalCellEditorModel.cs
+++ b/src/RolemasterDb.App/Components/Shared/CriticalCellEditorModel.cs
@@ -1,3 +1,4 @@
+using System.Text.Json;
 using RolemasterDb.App.Features;
 
 namespace RolemasterDb.App.Components.Shared;
@@ -19,6 +20,7 @@ public sealed class CriticalCellEditorModel
     public string? RawAffixText { get; set; }
     public string ParseStatus { get; set; } = string.Empty;
     public string ParsedJson { get; set; } = "{}";
+    public List<string> ValidationMessages { get; set; } = [];
     public List<CriticalEffectEditorModel> Effects { get; set; } = [];
     public List<CriticalBranchEditorModel> Branches { get; set; } = [];
 
@@ -40,6 +42,7 @@ public sealed class CriticalCellEditorModel
             RawAffixText = response.RawAffixText,
             ParseStatus = response.ParseStatus,
             ParsedJson = response.ParsedJson,
+            ValidationMessages = response.ValidationMessages.ToList(),
             Effects = response.Effects.Select(CriticalEffectEditorModel.FromItem).ToList(),
             Branches = response.Branches.Select(CriticalBranchEditorModel.FromItem).ToList()
         };
@@ -49,8 +52,8 @@ public sealed class CriticalCellEditorModel
             RawCellText,
             DescriptionText,
             RawAffixText,
-            ParseStatus,
-            ParsedJson,
+            ResolveParseStatus(Effects, Branches),
+            SerializeParsedEffects(Effects),
             Effects.Select(effect => effect.ToItem()).ToList(),
             Branches
                 .OrderBy(branch => branch.SortOrder)
@@ -60,4 +63,16 @@ public sealed class CriticalCellEditorModel
                     return branch.ToItem();
                 })
                 .ToList());
+
+    private static string ResolveParseStatus(
+        IReadOnlyList<CriticalEffectEditorModel> effects,
+        IReadOnlyList<CriticalBranchEditorModel> branches) =>
+        effects.Count > 0 || branches.Any(branch => branch.Effects.Count > 0)
+            ? "partial"
+            : "raw";
+
+    private static string SerializeParsedEffects(IReadOnlyList<CriticalEffectEditorModel> effects) =>
+        effects.Count == 0
+            ? "{}"
+            : JsonSerializer.Serialize(new { effects = effects.Select(effect => effect.ToItem()).ToList() });
 }
diff --git a/src/RolemasterDb.App/Domain/CriticalEffectCodes.cs b/src/RolemasterDb.App/Domain/CriticalEffectCodes.cs
index da11430..7cf8da3 100644
--- a/src/RolemasterDb.App/Domain/CriticalEffectCodes.cs
+++ b/src/RolemasterDb.App/Domain/CriticalEffectCodes.cs
@@ -2,12 +2,12 @@ namespace RolemasterDb.App.Domain;
 
 public static class CriticalEffectCodes
 {
-    public const string DirectHits = "direct_hits";
-    public const string MustParryRounds = "must_parry_rounds";
-    public const string NoParryRounds = "no_parry_rounds";
-    public const string StunnedRounds = "stunned_rounds";
-    public const string BleedPerRound = "bleed_per_round";
-    public const string FoePenalty = "foe_penalty";
-    public const string AttackerBonusNextRound = "attacker_bonus_next_round";
-    public const string PowerPointModifier = "power_point_modifier";
+    public const string DirectHits = RolemasterDb.CriticalParsing.CriticalEffectCodes.DirectHits;
+    public const string MustParryRounds = RolemasterDb.CriticalParsing.CriticalEffectCodes.MustParryRounds;
+    public const string NoParryRounds = RolemasterDb.CriticalParsing.CriticalEffectCodes.NoParryRounds;
+    public const string StunnedRounds = RolemasterDb.CriticalParsing.CriticalEffectCodes.StunnedRounds;
+    public const string BleedPerRound = RolemasterDb.CriticalParsing.CriticalEffectCodes.BleedPerRound;
+    public const string FoePenalty = RolemasterDb.CriticalParsing.CriticalEffectCodes.FoePenalty;
+    public const string AttackerBonusNextRound = RolemasterDb.CriticalParsing.CriticalEffectCodes.AttackerBonusNextRound;
+    public const string PowerPointModifier = RolemasterDb.CriticalParsing.CriticalEffectCodes.PowerPointModifier;
 }
diff --git a/src/RolemasterDb.App/Features/CriticalCellEditorResponse.cs b/src/RolemasterDb.App/Features/CriticalCellEditorResponse.cs
index c9c9775..598a00c 100644
--- a/src/RolemasterDb.App/Features/CriticalCellEditorResponse.cs
+++ b/src/RolemasterDb.App/Features/CriticalCellEditorResponse.cs
@@ -18,5 +18,6 @@ public sealed record CriticalCellEditorResponse(
     string? RawAffixText,
     string ParseStatus,
     string ParsedJson,
+    IReadOnlyList<string> ValidationMessages,
     IReadOnlyList<CriticalEffectEditorItem> Effects,
     IReadOnlyList<CriticalBranchEditorItem> Branches);
diff --git a/src/RolemasterDb.App/Features/CriticalCellReparseRequest.cs b/src/RolemasterDb.App/Features/CriticalCellReparseRequest.cs
new file mode 100644
index 0000000..9a5f991
--- /dev/null
+++ b/src/RolemasterDb.App/Features/CriticalCellReparseRequest.cs
@@ -0,0 +1,4 @@
+namespace RolemasterDb.App.Features;
+
+public sealed record CriticalCellReparseRequest(
+    string RawCellText);
diff --git a/src/RolemasterDb.App/Features/LookupService.cs b/src/RolemasterDb.App/Features/LookupService.cs
index e660692..f726e3f 100644
--- a/src/RolemasterDb.App/Features/LookupService.cs
+++ b/src/RolemasterDb.App/Features/LookupService.cs
@@ -1,9 +1,11 @@
 using System;
 using System.Collections.Generic;
 using System.Linq;
+using System.Text.Json;
 using Microsoft.EntityFrameworkCore;
 using RolemasterDb.App.Data;
 using RolemasterDb.App.Domain;
+using SharedParsing = RolemasterDb.CriticalParsing;
 
 namespace RolemasterDb.App.Features;
 
@@ -286,6 +288,36 @@ public sealed class LookupService(IDbContextFactory<RolemasterDbContext> dbConte
         return result is null ? null : CreateCellEditorResponse(result);
     }
 
+    public async Task<CriticalCellEditorResponse?> ReparseCriticalCellAsync(
+        string slug,
+        int resultId,
+        string rawCellText,
+        CancellationToken cancellationToken = default)
+    {
+        await using var dbContext = await dbContextFactory.CreateDbContextAsync(cancellationToken);
+
+        var normalizedSlug = NormalizeSlug(slug);
+        var result = await dbContext.CriticalResults
+            .AsNoTracking()
+            .AsSplitQuery()
+            .Include(item => item.CriticalTable)
+            .Include(item => item.CriticalColumn)
+            .Include(item => item.CriticalGroup)
+            .Include(item => item.CriticalRollBand)
+            .SingleOrDefaultAsync(
+                item => item.Id == resultId && item.CriticalTable.Slug == normalizedSlug,
+                cancellationToken);
+
+        if (result is null)
+        {
+            return null;
+        }
+
+        var affixLegend = await BuildSharedAffixLegendAsync(dbContext, result.CriticalTableId, cancellationToken);
+        var content = SharedParsing.CriticalCellTextParser.Parse(rawCellText, affixLegend);
+        return CreateCellEditorResponse(result, content);
+    }
+
     public async Task<CriticalCellEditorResponse?> UpdateCriticalCellAsync(
         string slug,
         int resultId,
@@ -402,6 +434,7 @@ public sealed class LookupService(IDbContextFactory<RolemasterDbContext> dbConte
             result.RawAffixText,
             result.ParseStatus,
             result.ParsedJson,
+            [],
             result.Effects
                 .OrderBy(effect => effect.Id)
                 .Select(CreateEffectEditorItem)
@@ -411,6 +444,34 @@ public sealed class LookupService(IDbContextFactory<RolemasterDbContext> dbConte
                 .Select(CreateBranchEditorItem)
                 .ToList());
 
+    private static CriticalCellEditorResponse CreateCellEditorResponse(
+        CriticalResult result,
+        SharedParsing.CriticalCellParseContent content) =>
+        new(
+            result.Id,
+            result.CriticalTable.Slug,
+            result.CriticalTable.DisplayName,
+            result.CriticalTable.SourceDocument,
+            result.CriticalRollBand.Label,
+            result.CriticalGroup?.GroupKey,
+            result.CriticalGroup?.Label,
+            result.CriticalColumn.ColumnKey,
+            result.CriticalColumn.Label,
+            result.CriticalColumn.Role,
+            content.RawCellText,
+            content.DescriptionText,
+            content.RawAffixText,
+            ResolveParseStatus(content.Effects, content.Branches),
+            SerializeParsedEffects(content.Effects),
+            content.ValidationErrors.ToList(),
+            content.Effects
+                .Select(CreateEffectEditorItem)
+                .ToList(),
+            content.Branches
+                .OrderBy(branch => branch.SortOrder)
+                .Select(CreateBranchEditorItem)
+                .ToList());
+
     private static CriticalBranchLookupResponse CreateBranchLookupResponse(CriticalBranch branch) =>
         new(
             branch.BranchKind,
@@ -441,6 +502,21 @@ public sealed class LookupService(IDbContextFactory<RolemasterDbContext> dbConte
                 .Select(CreateEffectEditorItem)
                 .ToList());
 
+    private static CriticalBranchEditorItem CreateBranchEditorItem(SharedParsing.ParsedCriticalBranch branch) =>
+        new(
+            branch.BranchKind,
+            branch.ConditionKey,
+            branch.ConditionText,
+            "{}",
+            branch.RawText,
+            branch.DescriptionText,
+            branch.RawAffixText,
+            SerializeParsedEffects(branch.Effects),
+            branch.SortOrder,
+            branch.Effects
+                .Select(CreateEffectEditorItem)
+                .ToList());
+
     private static CriticalEffectEditorItem CreateEffectEditorItem(CriticalEffect effect) =>
         new(
             effect.EffectCode,
@@ -456,6 +532,21 @@ public sealed class LookupService(IDbContextFactory<RolemasterDbContext> dbConte
             effect.SourceType,
             effect.SourceText);
 
+    private static CriticalEffectEditorItem CreateEffectEditorItem(SharedParsing.ParsedCriticalEffect effect) =>
+        new(
+            effect.EffectCode,
+            effect.Target,
+            effect.ValueInteger,
+            null,
+            effect.ValueExpression,
+            effect.DurationRounds,
+            effect.PerRound,
+            effect.Modifier,
+            effect.BodyPart,
+            effect.IsPermanent,
+            effect.SourceType,
+            effect.SourceText);
+
     private static void ReplaceBaseEffects(
         RolemasterDbContext dbContext,
         CriticalResult result,
@@ -520,10 +611,120 @@ public sealed class LookupService(IDbContextFactory<RolemasterDbContext> dbConte
             Modifier = effect.Modifier,
             BodyPart = NormalizeOptionalText(effect.BodyPart),
             IsPermanent = effect.IsPermanent,
-            SourceType = effect.SourceType.Trim(),
+            SourceType = string.IsNullOrWhiteSpace(effect.SourceType) ? "manual" : effect.SourceType.Trim(),
             SourceText = NormalizeOptionalText(effect.SourceText)
         };
 
+    private static string ResolveParseStatus(
+        IReadOnlyList<SharedParsing.ParsedCriticalEffect> effects,
+        IReadOnlyList<SharedParsing.ParsedCriticalBranch> branches) =>
+        effects.Count > 0 || branches.Any(branch => branch.Effects.Count > 0)
+            ? "partial"
+            : "raw";
+
+    private static string SerializeParsedEffects(IReadOnlyList<SharedParsing.ParsedCriticalEffect> effects) =>
+        effects.Count == 0
+            ? "{}"
+            : JsonSerializer.Serialize(new
+            {
+                effects = effects.Select(effect => new
+                {
+                    effect.EffectCode,
+                    effect.Target,
+                    effect.ValueInteger,
+                    effect.ValueExpression,
+                    effect.DurationRounds,
+                    effect.PerRound,
+                    effect.Modifier,
+                    effect.BodyPart,
+                    effect.IsPermanent,
+                    effect.SourceType,
+                    effect.SourceText
+                }).ToList()
+            });
+
+    private static async Task<SharedParsing.AffixLegend> BuildSharedAffixLegendAsync(
+        RolemasterDbContext dbContext,
+        int tableId,
+        CancellationToken cancellationToken)
+    {
+        var effectRows = await dbContext.CriticalEffects
+            .AsNoTracking()
+            .Where(item =>
+                (item.CriticalResult != null && item.CriticalResult.CriticalTableId == tableId) ||
+                (item.CriticalBranch != null && item.CriticalBranch.CriticalResult.CriticalTableId == tableId))
+            .Select(item => new { item.EffectCode, item.SourceType, item.SourceText })
+            .ToListAsync(cancellationToken);
+
+        var symbolEffects = new Dictionary<string, string>(StringComparer.Ordinal);
+        var supportsFoePenalty = false;
+        var supportsAttackerBonus = false;
+        var supportsPowerPointModifier = false;
+
+        foreach (var effectRow in effectRows)
+        {
+            supportsFoePenalty |= string.Equals(effectRow.EffectCode, CriticalEffectCodes.FoePenalty, StringComparison.Ordinal);
+            supportsAttackerBonus |= string.Equals(effectRow.EffectCode, CriticalEffectCodes.AttackerBonusNextRound, StringComparison.Ordinal);
+            supportsPowerPointModifier |= string.Equals(effectRow.EffectCode, CriticalEffectCodes.PowerPointModifier, StringComparison.Ordinal);
+
+            if (!string.Equals(effectRow.SourceType, "symbol", StringComparison.OrdinalIgnoreCase) ||
+                !IsLegendSymbolEffectCode(effectRow.EffectCode) ||
+                !TryExtractLegendSymbol(effectRow.SourceText, out var symbol))
+            {
+                continue;
+            }
+
+            symbolEffects.TryAdd(symbol, effectRow.EffectCode);
+        }
+
+        return new SharedParsing.AffixLegend(
+            symbolEffects,
+            supportsPowerPointModifier ? ["P"] : [],
+            supportsFoePenalty,
+            supportsAttackerBonus,
+            supportsPowerPointModifier);
+    }
+
+    private static bool IsLegendSymbolEffectCode(string effectCode) =>
+        effectCode is CriticalEffectCodes.MustParryRounds
+            or CriticalEffectCodes.NoParryRounds
+            or CriticalEffectCodes.StunnedRounds
+            or CriticalEffectCodes.BleedPerRound;
+
+    private static bool TryExtractLegendSymbol(string? sourceText, out string symbol)
+    {
+        symbol = string.Empty;
+        if (string.IsNullOrWhiteSpace(sourceText))
+        {
+            return false;
+        }
+
+        var candidate = new string(sourceText
+            .Where(character =>
+                !char.IsWhiteSpace(character) &&
+                !char.IsDigit(character) &&
+                character is not ('+' or '-' or '–' or '(' or ')' or '/') &&
+                !char.IsLetter(character))
+            .ToArray());
+
+        if (string.IsNullOrWhiteSpace(candidate))
+        {
+            return false;
+        }
+
+        var distinctSymbols = candidate
+            .Distinct()
+            .ToList();
+
+        if (distinctSymbols.Count != 1)
+        {
+            return false;
+        }
+
+        symbol = distinctSymbols[0].ToString();
+        return true;
+    }
+
     private static string? NormalizeOptionalText(string? value) =>
         string.IsNullOrWhiteSpace(value) ? null : value.Trim();
 
diff --git a/src/RolemasterDb.App/Program.cs b/src/RolemasterDb.App/Program.cs
index b25ba8d..3cb6512 100644
--- a/src/RolemasterDb.App/Program.cs
+++ b/src/RolemasterDb.App/Program.cs
@@ -40,6 +40,11 @@ api.MapGet("/tables/critical/{slug}/cells/{resultId:int}", async (string slug, i
     var result = await lookupService.GetCriticalCellEditorAsync(slug, resultId, cancellationToken);
     return result is null ? Results.NotFound() : Results.Ok(result);
 });
+api.MapPost("/tables/critical/{slug}/cells/{resultId:int}/reparse", async (string slug, int resultId, CriticalCellReparseRequest request, LookupService lookupService, CancellationToken cancellationToken) =>
+{
+    var result = await lookupService.ReparseCriticalCellAsync(slug, resultId, request.RawCellText, cancellationToken);
+    return result is null ? Results.NotFound() : Results.Ok(result);
+});
 api.MapPut("/tables/critical/{slug}/cells/{resultId:int}", async (string slug, int resultId, CriticalCellUpdateRequest request, LookupService lookupService, CancellationToken cancellationToken) =>
 {
     var result = await lookupService.UpdateCriticalCellAsync(slug, resultId, request, cancellationToken);
diff --git a/src/RolemasterDb.App/RolemasterDb.App.csproj b/src/RolemasterDb.App/RolemasterDb.App.csproj
index 6d4ac29..b1215d1 100644
--- a/src/RolemasterDb.App/RolemasterDb.App.csproj
+++ b/src/RolemasterDb.App/RolemasterDb.App.csproj
@@ -16,4 +16,8 @@
     <PackageReference Include="Microsoft.EntityFrameworkCore.Sqlite" Version="10.0.2" />
   </ItemGroup>
 
+  <ItemGroup>
+    <ProjectReference Include="..\RolemasterDb.CriticalParsing\RolemasterDb.CriticalParsing.csproj" />
+  </ItemGroup>
+
 </Project>
diff --git a/src/RolemasterDb.App/wwwroot/app.css b/src/RolemasterDb.App/wwwroot/app.css
index 38034db..1973c18 100644
--- a/src/RolemasterDb.App/wwwroot/app.css
+++ b/src/RolemasterDb.App/wwwroot/app.css
@@ -830,6 +830,19 @@ textarea {
     gap: 0.75rem;
 }
 
+.critical-editor-validation-list {
+    display: grid;
+    gap: 0.45rem;
+}
+
+.critical-editor-validation-item {
+    margin: 0;
+    padding: 0.65rem 0.8rem;
+    border-radius: 12px;
+    background: rgba(184, 121, 59, 0.12);
+    color: #6b4c29;
+}
+
 .critical-editor-effect-grid {
     grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
 }
diff --git a/src/RolemasterDb.CriticalParsing/AffixEffectParser.cs b/src/RolemasterDb.CriticalParsing/AffixEffectParser.cs
new file mode 100644
index 0000000..a1ec7b0
--- /dev/null
+++ b/src/RolemasterDb.CriticalParsing/AffixEffectParser.cs
@@ -0,0 +1,279 @@
+using System.Text.RegularExpressions;
+
+namespace RolemasterDb.CriticalParsing;
+
+public static class AffixEffectParser
+{
+    private const string FoeTarget = "foe";
+
+    private static readonly Regex DirectHitsRegex = new(@"[+-]\s*\d+\s*H\b", RegexOptions.Compiled);
+    private static readonly Regex PowerPointModifierRegex = new(@"\+\s*\((?<expression>[^)]+)\)\s*P\b", RegexOptions.Compiled);
+    private static readonly Regex ModifierRegex = new(@"\((?<noise>[^0-9+\-)]*)(?<sign>[+-])\s*(?<value>\d+)\)", RegexOptions.Compiled);
+
+    public static IReadOnlyList<ParsedCriticalEffect> Parse(string? rawAffixText, AffixLegend affixLegend)
+    {
+        if (string.IsNullOrWhiteSpace(rawAffixText))
+        {
+            return [];
+        }
+
+        var effects = new List<ParsedCriticalEffect>();
+
+        foreach (var rawLine in rawAffixText.Split(Environment.NewLine, StringSplitOptions.RemoveEmptyEntries | StringSplitOptions.TrimEntries))
+        {
+            ParseLine(CriticalCellParserSupport.CollapseWhitespace(rawLine), affixLegend, effects);
+        }
+
+        return effects;
+    }
+
+    private static void ParseLine(string line, AffixLegend affixLegend, List<ParsedCriticalEffect> effects)
+    {
+        if (string.IsNullOrWhiteSpace(line) || line is "-" or "–" or "—")
+        {
+            return;
+        }
+
+        var consumedRanges = new List<(int Start, int End)>();
+        var matchedEffects = new List<(int Index, ParsedCriticalEffect Effect)>();
+
+        AddMatches(
+            DirectHitsRegex.Matches(line),
+            matchedEffects,
+            consumedRanges,
+            match =>
+            {
+                var hits = ParseSignedInteger(match.Value);
+                return new ParsedCriticalEffect(
+                    CriticalEffectCodes.DirectHits,
+                    FoeTarget,
+                    hits,
+                    null,
+                    null,
+                    null,
+                    null,
+                    null,
+                    false,
+                    "symbol",
+                    NormalizeToken(match.Value));
+            });
+
+        if (affixLegend.SupportsPowerPointModifier)
+        {
+            AddMatches(
+                PowerPointModifierRegex.Matches(line),
+                matchedEffects,
+                consumedRanges,
+                match => new ParsedCriticalEffect(
+                    CriticalEffectCodes.PowerPointModifier,
+                    FoeTarget,
+                    null,
+                    CriticalCellParserSupport.CollapseWhitespace(match.Groups["expression"].Value),
+                    null,
+                    null,
+                    null,
+                    null,
+                    false,
+                    "symbol",
+                    NormalizeToken(match.Value)));
+        }
+
+        AddMatches(
+            ModifierRegex.Matches(line),
+            matchedEffects,
+            consumedRanges,
+            match =>
+            {
+                var modifier = BuildModifier(match);
+                if (modifier is null)
+                {
+                    return null;
+                }
+
+                if (modifier.Value < 0 && affixLegend.SupportsFoePenalty)
+                {
+                    return new ParsedCriticalEffect(
+                        CriticalEffectCodes.FoePenalty,
+                        FoeTarget,
+                        null,
+                        null,
+                        null,
+                        null,
+                        modifier.Value,
+                        null,
+                        false,
+                        "symbol",
+                        NormalizeToken(match.Value));
+                }
+
+                if (modifier.Value > 0 && affixLegend.SupportsAttackerBonus)
+                {
+                    return new ParsedCriticalEffect(
+                        CriticalEffectCodes.AttackerBonusNextRound,
+                        null,
+                        null,
+                        null,
+                        null,
+                        null,
+                        modifier.Value,
+                        null,
+                        false,
+                        "symbol",
+                        NormalizeToken(match.Value));
+                }
+
+                return null;
+            });
+
+        var symbolClusterRegex = CreateSymbolClusterRegex(affixLegend.EffectSymbols);
+        if (symbolClusterRegex is null)
+        {
+            return;
+        }
+
+        foreach (Match match in symbolClusterRegex.Matches(line))
+        {
+            if (!match.Success || OverlapsConsumedRange(match, consumedRanges))
+            {
+                continue;
+            }
+
+            var magnitude = match.Groups["count"].Success
+                ? int.Parse(match.Groups["count"].Value)
+                : 1;
+            var matchedText = NormalizeToken(match.Value);
+
+            foreach (var symbol in match.Groups["symbols"].Value.Select(character => character.ToString()))
+            {
+                var effectCode = affixLegend.ResolveEffectCode(symbol);
+                if (effectCode is null)
+                {
+                    continue;
+                }
+
+                matchedEffects.Add((match.Index, CreateSymbolEffect(effectCode, magnitude, matchedText)));
+            }
+        }
+
+        if (matchedEffects.Count > 0)
+        {
+            effects.AddRange(matchedEffects
+                .OrderBy(item => item.Index)
+                .Select(item => item.Effect));
+        }
+    }
+
+    private static ParsedCriticalEffect CreateSymbolEffect(string effectCode, int magnitude, string sourceText) =>
+        effectCode switch
+        {
+            CriticalEffectCodes.MustParryRounds => new ParsedCriticalEffect(
+                effectCode,
+                FoeTarget,
+                null,
+                null,
+                magnitude,
+                null,
+                null,
+                null,
+                false,
+                "symbol",
+                sourceText),
+            CriticalEffectCodes.NoParryRounds => new ParsedCriticalEffect(
+                effectCode,
+                FoeTarget,
+                null,
+                null,
+                magnitude,
+                null,
+                null,
+                null,
+                false,
+                "symbol",
+                sourceText),
+            CriticalEffectCodes.StunnedRounds => new ParsedCriticalEffect(
+                effectCode,
+                FoeTarget,
+                null,
+                null,
+                magnitude,
+                null,
+                null,
+                null,
+                false,
+                "symbol",
+                sourceText),
+            CriticalEffectCodes.BleedPerRound => new ParsedCriticalEffect(
+                effectCode,
+                FoeTarget,
+                null,
+                null,
+                null,
+                magnitude,
+                null,
+                null,
+                false,
+                "symbol",
+                sourceText),
+            _ => throw new InvalidOperationException($"Unsupported symbol effect code '{effectCode}'.")
+        };
+
+    private static Regex? CreateSymbolClusterRegex(IReadOnlySet<string> symbols)
+    {
+        if (symbols.Count == 0)
+        {
+            return null;
+        }
+
+        var escapedSymbols = string.Concat(symbols.Select(Regex.Escape));
+        return new Regex(
+            $@"(?<![A-Za-z0-9])(?:(?<count>\d+)\s*)?(?<symbols>[{escapedSymbols}]+)",
+            RegexOptions.Compiled);
+    }
+
+    private static void AddMatches(
+        MatchCollection matches,
+        List<(int Index, ParsedCriticalEffect Effect)> matchedEffects,
+        List<(int Start, int End)> consumedRanges,
+        Func<Match, ParsedCriticalEffect?> createEffect)
+    {
+        foreach (Match match in matches)
+        {
+            if (!match.Success || OverlapsConsumedRange(match, consumedRanges))
+            {
+                continue;
+            }
+
+            consumedRanges.Add((match.Index, match.Index + match.Length));
+
+            var effect = createEffect(match);
+            if (effect is not null)
+            {
+                matchedEffects.Add((match.Index, effect));
+            }
+        }
+    }
+
+    private static bool OverlapsConsumedRange(Match match, IReadOnlyList<(int Start, int End)> consumedRanges) =>
+        consumedRanges.Any(range => match.Index < range.End && range.Start < match.Index + match.Length);
+
+    private static int ParseSignedInteger(string value) =>
+        int.Parse(value.Replace(" ", string.Empty, StringComparison.Ordinal).Replace("H", string.Empty, StringComparison.OrdinalIgnoreCase));
+
+    private static int? BuildModifier(Match match)
+    {
+        if (!int.TryParse(match.Groups["value"].Value, out var absoluteValue))
+        {
+            return null;
+        }
+
+        return string.Equals(match.Groups["sign"].Value, "-", StringComparison.Ordinal)
+            ? -absoluteValue
+            : absoluteValue;
+    }
+
+    private static string NormalizeToken(string value) =>
+        CriticalCellParserSupport.CollapseWhitespace(value)
+            .Replace(" +", "+", StringComparison.Ordinal)
+            .Replace("( ", "(", StringComparison.Ordinal)
+            .Replace(" )", ")", StringComparison.Ordinal);
+}
diff --git a/src/RolemasterDb.CriticalParsing/AffixLegend.cs b/src/RolemasterDb.CriticalParsing/AffixLegend.cs
new file mode 100644
index 0000000..7839e0e
--- /dev/null
+++ b/src/RolemasterDb.CriticalParsing/AffixLegend.cs
@@ -0,0 +1,50 @@
+namespace RolemasterDb.CriticalParsing;
+
+public sealed class AffixLegend
+{
+    public static AffixLegend Empty { get; } = new(
+        new Dictionary<string, string>(StringComparer.Ordinal),
+        [],
+        supportsFoePenalty: false,
+        supportsAttackerBonus: false,
+        supportsPowerPointModifier: false);
+
+    public AffixLegend(
+        IReadOnlyDictionary<string, string> symbolEffects,
+        IReadOnlyCollection<string> classificationOnlySymbols,
+        bool supportsFoePenalty,
+        bool supportsAttackerBonus,
+        bool supportsPowerPointModifier)
+    {
+        SymbolEffects = new Dictionary<string, string>(symbolEffects, StringComparer.Ordinal);
+        EffectSymbols = new HashSet<string>(SymbolEffects.Keys, StringComparer.Ordinal);
+
+        var classificationSymbols = new HashSet<string>(EffectSymbols, StringComparer.Ordinal);
+        foreach (var symbol in classificationOnlySymbols)
+        {
+            classificationSymbols.Add(symbol);
+        }
+
+        ClassificationSymbols = classificationSymbols;
+        SupportsFoePenalty = supportsFoePenalty;
+        SupportsAttackerBonus = supportsAttackerBonus;
+        SupportsPowerPointModifier = supportsPowerPointModifier;
+    }
+
+    public IReadOnlyDictionary<string, string> SymbolEffects { get; }
+
+    public IReadOnlySet<string> EffectSymbols { get; }
+
+    public IReadOnlySet<string> ClassificationSymbols { get; }
+
+    public bool SupportsFoePenalty { get; }
+
+    public bool SupportsAttackerBonus { get; }
+
+    public bool SupportsPowerPointModifier { get; }
+
+    public string? ResolveEffectCode(string symbol) =>
+        SymbolEffects.TryGetValue(symbol, out var effectCode)
+            ? effectCode
+            : null;
+}
diff --git a/src/RolemasterDb.CriticalParsing/CriticalCellParseContent.cs b/src/RolemasterDb.CriticalParsing/CriticalCellParseContent.cs
new file mode 100644
index 0000000..153042c
--- /dev/null
+++ b/src/RolemasterDb.CriticalParsing/CriticalCellParseContent.cs
@@ -0,0 +1,19 @@
+namespace RolemasterDb.CriticalParsing;
+
+public sealed class CriticalCellParseContent(
+    IReadOnlyList<string> baseLines,
+    string rawCellText,
+    string descriptionText,
+    string? rawAffixText,
+    IReadOnlyList<ParsedCriticalEffect> effects,
+    IReadOnlyList<ParsedCriticalBranch> branches,
+    IReadOnlyList<string> validationErrors)
+{
+    public IReadOnlyList<string> BaseLines { get; } = baseLines;
+    public string RawCellText { get; } = rawCellText;
+    public string DescriptionText { get; } = descriptionText;
+    public string? RawAffixText { get; } = rawAffixText;
+    public IReadOnlyList<ParsedCriticalEffect> Effects { get; } = effects;
+    public IReadOnlyList<ParsedCriticalBranch> Branches { get; } = branches;
+    public IReadOnlyList<string> ValidationErrors { get; } = validationErrors;
+}
diff --git a/src/RolemasterDb.CriticalParsing/CriticalCellParserSupport.cs b/src/RolemasterDb.CriticalParsing/CriticalCellParserSupport.cs
new file mode 100644
index 0000000..6ad951f
--- /dev/null
+++ b/src/RolemasterDb.CriticalParsing/CriticalCellParserSupport.cs
@@ -0,0 +1,118 @@
+using System.Text.RegularExpressions;
+
+namespace RolemasterDb.CriticalParsing;
+
+public static class CriticalCellParserSupport
+{
+    private static readonly Regex NumericAffixLineRegex = new(@"^\d+(?:H|∑|∏|π|∫|\s*[–-])", RegexOptions.Compiled);
+    private static readonly Regex StandaloneModifierAffixLineRegex = new(@"^(?:\d+)?\((?:\+|-|–)\d+\)$", RegexOptions.Compiled);
+
+    public static bool IsAffixLikeLine(string line, IReadOnlySet<string> affixLegendSymbols)
+    {
+        var value = line.Trim();
+        if (value.Length == 0)
+        {
+            return false;
+        }
+
+        if (value is "-" or "\u2013" or "\u2014")
+        {
+            return true;
+        }
+
+        if (IsConditionalBranchStartLine(value))
+        {
+            return true;
+        }
+
+        if (affixLegendSymbols.Count > 0 &&
+            affixLegendSymbols.Any(symbol => value.Contains(symbol, StringComparison.Ordinal)))
+        {
+            if (value.Any(char.IsDigit))
+            {
+                return true;
+            }
+
+            var remainder = value;
+            foreach (var symbol in affixLegendSymbols.OrderByDescending(item => item.Length))
+            {
+                remainder = remainder.Replace(symbol, string.Empty, StringComparison.Ordinal);
+            }
+
+            remainder = remainder
+                .Replace("+", string.Empty, StringComparison.Ordinal)
+                .Replace("-", string.Empty, StringComparison.Ordinal)
+                .Replace("–", string.Empty, StringComparison.Ordinal)
+                .Replace("(", string.Empty, StringComparison.Ordinal)
+                .Replace(")", string.Empty, StringComparison.Ordinal)
+                .Replace("/", string.Empty, StringComparison.Ordinal);
+
+            if (string.IsNullOrWhiteSpace(remainder))
+            {
+                return true;
+            }
+        }
+
+        return value.StartsWith("+", StringComparison.Ordinal) ||
+               value.StartsWith("\u2211", StringComparison.Ordinal) ||
+               value.StartsWith("\u220F", StringComparison.Ordinal) ||
+               value.StartsWith("\u03C0", StringComparison.Ordinal) ||
+               value.StartsWith("\u222B", StringComparison.Ordinal) ||
+               StandaloneModifierAffixLineRegex.IsMatch(value) ||
+               NumericAffixLineRegex.IsMatch(value) ||
+               value.Contains(" - ", StringComparison.Ordinal) ||
+               value.Contains(" – ", StringComparison.Ordinal);
+    }
+
+    public static int CountLineTypeSegments(IReadOnlyList<string> lines, IReadOnlySet<string> affixLegendSymbols)
+    {
+        var segmentCount = 0;
+        bool? previousIsAffix = null;
+
+        foreach (var line in lines)
+        {
+            var currentIsAffix = IsAffixLikeLine(line, affixLegendSymbols);
+            if (previousIsAffix == currentIsAffix)
+            {
+                continue;
+            }
+
+            segmentCount++;
+            previousIsAffix = currentIsAffix;
+        }
+
+        return segmentCount;
+    }
+
+    public static string CollapseWhitespace(string value) =>
+        Regex.Replace(value.Trim(), @"\s+", " ");
+
+    public static bool IsConditionalBranchStartLine(string value)
+    {
+        var normalized = value.Trim();
+        if (!normalized.Contains(':', StringComparison.Ordinal))
+        {
+            return false;
+        }
+
+        return normalized.StartsWith("with ", StringComparison.OrdinalIgnoreCase) ||
+               normalized.StartsWith("w/ ", StringComparison.OrdinalIgnoreCase) ||
+               normalized.StartsWith("w/o ", StringComparison.OrdinalIgnoreCase) ||
+               normalized.StartsWith("without ", StringComparison.OrdinalIgnoreCase) ||
+               normalized.StartsWith("if ", StringComparison.OrdinalIgnoreCase) ||
+               normalized.StartsWith("while ", StringComparison.OrdinalIgnoreCase) ||
+               normalized.StartsWith("until ", StringComparison.OrdinalIgnoreCase) ||
+               normalized.StartsWith("unless ", StringComparison.OrdinalIgnoreCase);
+    }
+
+    public static string? NormalizeConditionKey(string conditionText)
+    {
+        var normalized = CollapseWhitespace(conditionText)
+            .ToLowerInvariant()
+            .Replace("w/o", "without", StringComparison.Ordinal)
+            .Replace("w/", "with", StringComparison.Ordinal);
+        normalized = Regex.Replace(normalized, @"[^a-z0-9]+", "_");
+        normalized = normalized.Trim('_');
+        return normalized.Length == 0 ? null : normalized;
+    }
+}
diff --git a/src/RolemasterDb.CriticalParsing/CriticalCellTextParser.cs b/src/RolemasterDb.CriticalParsing/CriticalCellTextParser.cs
new file mode 100644
index 0000000..0c66261
--- /dev/null
+++ b/src/RolemasterDb.CriticalParsing/CriticalCellTextParser.cs
@@ -0,0 +1,127 @@
+namespace RolemasterDb.CriticalParsing;
+
+public static class CriticalCellTextParser
+{
+    public static CriticalCellParseContent Parse(string rawCellText, AffixLegend affixLegend)
+    {
+        var lines = rawCellText
+            .Split(["\r\n", "\n", "\r"], StringSplitOptions.RemoveEmptyEntries | StringSplitOptions.TrimEntries)
+            .ToList();
+        return Parse(lines, affixLegend);
+    }
+
+    public static CriticalCellParseContent Parse(IReadOnlyList<string> lines, AffixLegend affixLegend)
+    {
+        var validationErrors = new List<string>();
+        var branchStartIndexes = FindBranchStartIndexes(lines);
+        var baseLineCount = branchStartIndexes.Count == 0 ? lines.Count : branchStartIndexes[0];
+        var baseLines = lines.Take(baseLineCount).ToList();
+        var branches = new List<ParsedCriticalBranch>();
+        var affixLegendSymbols = affixLegend.ClassificationSymbols;
+
+        validationErrors.AddRange(ValidateSegmentCount(baseLines, affixLegendSymbols, "Base content"));
+
+        for (var branchIndex = 0; branchIndex < branchStartIndexes.Count; branchIndex++)
+        {
+            var startIndex = branchStartIndexes[branchIndex];
+            var endIndex = branchIndex == branchStartIndexes.Count - 1
+                ? lines.Count
+                : branchStartIndexes[branchIndex + 1];
+
+            branches.Add(ParseBranch(
+                lines.Skip(startIndex).Take(endIndex - startIndex).ToList(),
+                branchIndex + 1,
+                affixLegend,
+                validationErrors));
+        }
+
+        var (rawText, descriptionText, rawAffixText) = BuildTextSections(baseLines, affixLegendSymbols);
+        var effects = AffixEffectParser.Parse(rawAffixText, affixLegend);
+        return new CriticalCellParseContent(baseLines, rawText, descriptionText, rawAffixText, effects, branches, validationErrors);
+    }
+
+    private static ParsedCriticalBranch ParseBranch(
+        IReadOnlyList<string> branchLines,
+        int sortOrder,
+        AffixLegend affixLegend,
+        List<string> validationErrors)
+    {
+        var firstLine = branchLines[0];
+        var separatorIndex = firstLine.IndexOf(':', StringComparison.Ordinal);
+        var conditionText = CriticalCellParserSupport.CollapseWhitespace(firstLine[..separatorIndex]);
+        var firstPayloadLine = CriticalCellParserSupport.CollapseWhitespace(firstLine[(separatorIndex + 1)..]);
+        var payloadLines = new List<string>();
+
+        if (!string.IsNullOrWhiteSpace(firstPayloadLine))
+        {
+            payloadLines.Add(firstPayloadLine);
+        }
+
+        foreach (var continuationLine in branchLines.Skip(1))
+        {
+            var normalized = CriticalCellParserSupport.CollapseWhitespace(continuationLine);
+            if (!string.IsNullOrWhiteSpace(normalized))
+            {
+                payloadLines.Add(normalized);
+            }
+        }
+
+        var affixLegendSymbols = affixLegend.ClassificationSymbols;
+        validationErrors.AddRange(ValidateSegmentCount(payloadLines, affixLegendSymbols, $"Branch '{conditionText}'"));
+
+        var (_, descriptionText, rawAffixText) = BuildTextSections(payloadLines, affixLegendSymbols);
+        var effects = AffixEffectParser.Parse(rawAffixText, affixLegend);
+        return new ParsedCriticalBranch(
+            "conditional",
+            CriticalCellParserSupport.NormalizeConditionKey(conditionText),
+            conditionText,
+            string.Join(Environment.NewLine, branchLines),
+            descriptionText,
+            rawAffixText,
+            effects,
+            sortOrder);
+    }
+
+    private static List<int> FindBranchStartIndexes(IReadOnlyList<string> lines)
+    {
+        var branchStartIndexes = new List<int>();
+
+        for (var index = 0; index < lines.Count; index++)
+        {
+            if (CriticalCellParserSupport.IsConditionalBranchStartLine(lines[index]))
+            {
+                branchStartIndexes.Add(index);
+            }
+        }
+
+        return branchStartIndexes;
+    }
+
+    private static IReadOnlyList<string> ValidateSegmentCount(
+        IReadOnlyList<string> lines,
+        IReadOnlySet<string> affixLegendSymbols,
+        string scope)
+    {
+        if (lines.Count == 0)
+        {
+            return [];
+        }
+
+        var segmentCount = CriticalCellParserSupport.CountLineTypeSegments(lines, affixLegendSymbols);
+        return segmentCount > 2
+            ? [$"{scope} interleaves prose and affix lines."]
+            : [];
+    }
+
+    private static (string RawText, string DescriptionText, string? RawAffixText) BuildTextSections(
+        IReadOnlyList<string> lines,
+        IReadOnlySet<string> affixLegendSymbols)
+    {
+        var rawText = string.Join(Environment.NewLine, lines);
+        var rawAffixLines = lines.Where(line => CriticalCellParserSupport.IsAffixLikeLine(line, affixLegendSymbols)).ToList();
+        var descriptionLines = lines.Where(line => !CriticalCellParserSupport.IsAffixLikeLine(line, affixLegendSymbols)).ToList();
+        var descriptionText = CriticalCellParserSupport.CollapseWhitespace(string.Join(' ', descriptionLines));
+        var rawAffixText = rawAffixLines.Count == 0 ? null : string.Join(Environment.NewLine, rawAffixLines);
+        return (rawText, descriptionText, rawAffixText);
+    }
+}
diff --git a/src/RolemasterDb.CriticalParsing/CriticalEffectCodes.cs b/src/RolemasterDb.CriticalParsing/CriticalEffectCodes.cs
new file mode 100644
index 0000000..3e548aa
--- /dev/null
+++ b/src/RolemasterDb.CriticalParsing/CriticalEffectCodes.cs
@@ -0,0 +1,13 @@
+namespace RolemasterDb.CriticalParsing;
+
+public static class CriticalEffectCodes
+{
+    public const string DirectHits = "direct_hits";
+    public const string MustParryRounds = "must_parry_rounds";
+    public const string NoParryRounds = "no_parry_rounds";
+    public const string StunnedRounds = "stunned_rounds";
+    public const string BleedPerRound = "bleed_per_round";
+    public const string FoePenalty = "foe_penalty";
+    public const string AttackerBonusNextRound = "attacker_bonus_next_round";
+    public const string PowerPointModifier = "power_point_modifier";
+}
diff --git a/src/RolemasterDb.CriticalParsing/ParsedCriticalBranch.cs b/src/RolemasterDb.CriticalParsing/ParsedCriticalBranch.cs
new file mode 100644
index 0000000..b47c0c1
--- /dev/null
+++ b/src/RolemasterDb.CriticalParsing/ParsedCriticalBranch.cs
@@ -0,0 +1,21 @@
+namespace RolemasterDb.CriticalParsing;
+
+public sealed class ParsedCriticalBranch(
+    string branchKind,
+    string? conditionKey,
+    string conditionText,
+    string rawText,
+    string descriptionText,
+    string? rawAffixText,
+    IReadOnlyList<ParsedCriticalEffect> effects,
+    int sortOrder)
+{
+    public string BranchKind { get; } = branchKind;
+    public string? ConditionKey { get; } = conditionKey;
+    public string ConditionText { get; } = conditionText;
+    public string RawText { get; } = rawText;
+    public string DescriptionText { get; } = descriptionText;
+    public string? RawAffixText { get; } = rawAffixText;
+    public IReadOnlyList<ParsedCriticalEffect> Effects { get; } = effects;
+    public int SortOrder { get; } = sortOrder;
+}
diff --git a/src/RolemasterDb.CriticalParsing/ParsedCriticalEffect.cs b/src/RolemasterDb.CriticalParsing/ParsedCriticalEffect.cs
new file mode 100644
index 0000000..5548e39
--- /dev/null
+++ b/src/RolemasterDb.CriticalParsing/ParsedCriticalEffect.cs
@@ -0,0 +1,27 @@
+namespace RolemasterDb.CriticalParsing;
+
+public sealed class ParsedCriticalEffect(
+    string effectCode,
+    string? target,
+    int? valueInteger,
+    string? valueExpression,
+    int? durationRounds,
+    int? perRound,
+    int? modifier,
+    string? bodyPart,
+    bool isPermanent,
+    string sourceType,
+    string sourceText)
+{
+    public string EffectCode { get; } = effectCode;
+    public string? Target { get; } = target;
+    public int? ValueInteger { get; } = valueInteger;
+    public string? ValueExpression { get; } = valueExpression;
+    public int? DurationRounds { get; } = durationRounds;
+    public int? PerRound { get; } = perRound;
+    public int? Modifier { get; } = modifier;
+    public string? BodyPart { get; } = bodyPart;
+    public bool IsPermanent { get; } = isPermanent;
+    public string SourceType { get; } = sourceType;
+    public string SourceText { get; } = sourceText;
+}
diff --git a/src/RolemasterDb.CriticalParsing/RolemasterDb.CriticalParsing.csproj b/src/RolemasterDb.CriticalParsing/RolemasterDb.CriticalParsing.csproj
new file mode 100644
index 0000000..9ed914b
--- /dev/null
+++ b/src/RolemasterDb.CriticalParsing/RolemasterDb.CriticalParsing.csproj
@@ -0,0 +1,9 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net10.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+</Project>
diff --git a/src/RolemasterDb.ImportTool.Tests/CriticalCellReparseIntegrationTests.cs b/src/RolemasterDb.ImportTool.Tests/CriticalCellReparseIntegrationTests.cs
new file mode 100644
index 0000000..495c5a3
--- /dev/null
+++ b/src/RolemasterDb.ImportTool.Tests/CriticalCellReparseIntegrationTests.cs
@@ -0,0 +1,138 @@
+using Microsoft.EntityFrameworkCore;
+
+using RolemasterDb.App.Data;
+using RolemasterDb.App.Domain;
+using RolemasterDb.App.Features;
+using RolemasterDb.CriticalParsing;
+using AppCriticalEffectCodes = RolemasterDb.App.Domain.CriticalEffectCodes;
+
+namespace RolemasterDb.ImportTool.Tests;
+
+public sealed class CriticalCellReparseIntegrationTests
+{
+    [Fact]
+    public void Shared_cell_parser_extracts_base_effects_and_condition_branches()
+    {
+        var legend = new AffixLegend(
+            new Dictionary<string, string>(StringComparer.Ordinal)
+            {
+                ["∫"] = AppCriticalEffectCodes.StunnedRounds
+            },
+            [],
+            supportsFoePenalty: false,
+            supportsAttackerBonus: false,
+            supportsPowerPointModifier: false);
+
+        var content = CriticalCellTextParser.Parse(
+            "Strike to thigh.\r\n+10H\r\nWith greaves: glancing blow.\r\n2∫",
+            legend);
+
+        Assert.Equal("Strike to thigh.", content.DescriptionText);
+        Assert.Equal("+10H", content.RawAffixText);
+        Assert.Contains(content.Effects, effect => effect.EffectCode == AppCriticalEffectCodes.DirectHits && effect.ValueInteger == 10);
+        Assert.Single(content.Branches);
+        Assert.Equal("with_greaves", content.Branches[0].ConditionKey);
+        Assert.Equal("glancing blow.", content.Branches[0].DescriptionText);
+        Assert.Contains(content.Branches[0].Effects, effect => effect.EffectCode == AppCriticalEffectCodes.StunnedRounds && effect.DurationRounds == 2);
+        Assert.Empty(content.ValidationErrors);
+    }
+
+    [Fact]
+    public async Task Lookup_service_reparse_uses_shared_parser_and_table_legend_data()
+    {
+        var databasePath = Path.Combine(Path.GetTempPath(), $"rolemaster-reparse-{Guid.NewGuid():N}.db");
+
+        await using (var seedContext = CreateDbContext(databasePath))
+        {
+            await seedContext.Database.EnsureCreatedAsync();
+
+            var table = new CriticalTable
+            {
+                Slug = "slash",
+                DisplayName = "Slash Critical Strike Table",
+                Family = "standard",
+                SourceDocument = "Slash.pdf",
+                Notes = null
+            };
+            var column = new CriticalColumn
+            {
+                CriticalTable = table,
+                ColumnKey = "B",
+                Label = "B",
+                Role = "severity",
+                SortOrder = 2
+            };
+            var rollBand = new CriticalRollBand
+            {
+                CriticalTable = table,
+                Label = "36-40",
+                MinRoll = 36,
+                MaxRoll = 40,
+                SortOrder = 8
+            };
+            var result = new CriticalResult
+            {
+                CriticalTable = table,
+                CriticalColumn = column,
+                CriticalRollBand = rollBand,
+                RawCellText = "Old text",
+                DescriptionText = "Old description",
+                ParseStatus = "verified",
+                ParsedJson = "{}"
+            };
+
+            result.Effects.Add(new CriticalEffect
+            {
+                EffectCode = AppCriticalEffectCodes.StunnedRounds,
+                Target = "foe",
+                DurationRounds = 1,
+                IsPermanent = false,
+                SourceType = "symbol",
+                SourceText = "∫"
+            });
+
+            seedContext.CriticalTables.Add(table);
+            seedContext.CriticalResults.Add(result);
+            await seedContext.SaveChangesAsync();
+        }
+
+        var lookupService = new LookupService(CreateDbContextFactory(databasePath));
+        await using var verifyContext = CreateDbContext(databasePath);
+        var resultId = await verifyContext.CriticalResults
+            .Where(item => item.CriticalTable.Slug == "slash")
+            .Select(item => item.Id)
+            .SingleAsync();
+
+        var response = await lookupService.ReparseCriticalCellAsync(
+            "slash",
+            resultId,
+            "Strike to thigh.\n+10H\nWith greaves: glancing blow.\n2∫");
+
+        Assert.NotNull(response);
+        Assert.Equal("Strike to thigh.", response!.DescriptionText);
+        Assert.Contains(response.Effects, effect => effect.EffectCode == AppCriticalEffectCodes.DirectHits && effect.ValueInteger == 10);
+        Assert.Contains(response.Branches, branch =>
+            branch.ConditionKey == "with_greaves" &&
+            branch.DescriptionText == "glancing blow." &&
+            branch.Effects.Any(effect => effect.EffectCode == AppCriticalEffectCodes.StunnedRounds && effect.DurationRounds == 2));
+        Assert.Empty(response.ValidationMessages);
+    }
+
+    private static RolemasterDbContext CreateDbContext(string databasePath)
+    {
+        var options = new DbContextOptionsBuilder<RolemasterDbContext>()
+            .UseSqlite($"Data Source={databasePath}")
+            .Options;
+
+        return new RolemasterDbContext(options);
+    }
+
+    private static IDbContextFactory<RolemasterDbContext> CreateDbContextFactory(string databasePath)
+    {
+        var options = new DbContextOptionsBuilder<RolemasterDbContext>()
+            .UseSqlite($"Data Source={databasePath}")
+            .Options;
+
+        return new TestRolemasterDbContextFactory(options);
+    }
+}
diff --git a/src/RolemasterDb.ImportTool.Tests/RolemasterDb.ImportTool.Tests.csproj b/src/RolemasterDb.ImportTool.Tests/RolemasterDb.ImportTool.Tests.csproj
index cf9043b..975741f 100644
--- a/src/RolemasterDb.ImportTool.Tests/RolemasterDb.ImportTool.Tests.csproj
+++ b/src/RolemasterDb.ImportTool.Tests/RolemasterDb.ImportTool.Tests.csproj
@@ -19,6 +19,7 @@
   </ItemGroup>
 
   <ItemGroup>
+    <ProjectReference Include="..\RolemasterDb.CriticalParsing\RolemasterDb.CriticalParsing.csproj" />
     <ProjectReference Include="..\RolemasterDb.ImportTool\RolemasterDb.ImportTool.csproj" />
   </ItemGroup>
 
diff --git a/src/RolemasterDb.ImportTool/Parsing/CriticalTableParserSupport.cs b/src/RolemasterDb.ImportTool/Parsing/CriticalTableParserSupport.cs
index f217ed4..f3e24b8 100644
--- a/src/RolemasterDb.ImportTool/Parsing/CriticalTableParserSupport.cs
+++ b/src/RolemasterDb.ImportTool/Parsing/CriticalTableParserSupport.cs
@@ -3,6 +3,7 @@ using System.Xml;
 using System.Xml.Linq;
 
 using RolemasterDb.App.Domain;
+using SharedParsing = RolemasterDb.CriticalParsing;
 
 namespace RolemasterDb.ImportTool.Parsing;
 
@@ -559,12 +560,17 @@ internal static class CriticalTableParserSupport
         List<ParsedCriticalResult> parsedResults,
         List<string> validationErrors)
     {
+        var sharedLegend = ToSharedAffixLegend(affixLegend);
+
         foreach (var cellEntry in cellEntries)
         {
-            var content = CriticalCellTextParser.Parse(cellEntry.Lines, affixLegend);
+            var content = SharedParsing.CriticalCellTextParser.Parse(cellEntry.Lines, sharedLegend);
             validationErrors.AddRange(content.ValidationErrors.Select(error =>
                 $"Cell '{BuildCellIdentifier(cellEntry)}': {error}"));
 
+            var effects = content.Effects.Select(ToImportToolEffect).ToList();
+            var branches = content.Branches.Select(ToImportToolBranch).ToList();
+
             parsedCells.Add(new ParsedCriticalCellArtifact(
                 cellEntry.GroupKey,
                 cellEntry.RollBandLabel,
@@ -574,8 +580,8 @@ internal static class CriticalTableParserSupport
                 content.RawCellText,
                 content.DescriptionText,
                 content.RawAffixText,
-                content.Effects,
-                content.Branches));
+                effects,
+                branches));
 
             parsedResults.Add(new ParsedCriticalResult(
                 cellEntry.GroupKey,
@@ -584,11 +590,44 @@ internal static class CriticalTableParserSupport
                 content.RawCellText,
                 content.DescriptionText,
                 content.RawAffixText,
-                content.Effects,
-                content.Branches));
+                effects,
+                branches));
         }
     }
 
+    private static SharedParsing.AffixLegend ToSharedAffixLegend(AffixLegend affixLegend) =>
+        new(
+            affixLegend.SymbolEffects,
+            affixLegend.ClassificationSymbols.Except(affixLegend.EffectSymbols).ToList(),
+            affixLegend.SupportsFoePenalty,
+            affixLegend.SupportsAttackerBonus,
+            affixLegend.SupportsPowerPointModifier);
+
+    private static ParsedCriticalEffect ToImportToolEffect(SharedParsing.ParsedCriticalEffect effect) =>
+        new(
+            effect.EffectCode,
+            effect.Target,
+            effect.ValueInteger,
+            effect.ValueExpression,
+            effect.DurationRounds,
+            effect.PerRound,
+            effect.Modifier,
+            effect.BodyPart,
+            effect.IsPermanent,
+            effect.SourceType,
+            effect.SourceText);
+
+    private static ParsedCriticalBranch ToImportToolBranch(SharedParsing.ParsedCriticalBranch branch) =>
+        new(
+            branch.BranchKind,
+            branch.ConditionKey,
+            branch.ConditionText,
+            branch.RawText,
+            branch.DescriptionText,
+            branch.RawAffixText,
+            branch.Effects.Select(ToImportToolEffect).ToList(),
+            branch.SortOrder);
+
     private static string BuildCellIdentifier(ColumnarCellEntry cellEntry) =>
         cellEntry.GroupKey is null
             ? $"{cellEntry.RollBandLabel}/{cellEntry.ColumnKey}"
diff --git a/src/RolemasterDb.ImportTool/RolemasterDb.ImportTool.csproj b/src/RolemasterDb.ImportTool/RolemasterDb.ImportTool.csproj
index 4640ad7..4ca256b 100644
--- a/src/RolemasterDb.ImportTool/RolemasterDb.ImportTool.csproj
+++ b/src/RolemasterDb.ImportTool/RolemasterDb.ImportTool.csproj
@@ -12,6 +12,7 @@
   </ItemGroup>
 
   <ItemGroup>
+    <ProjectReference Include="..\RolemasterDb.CriticalParsing\RolemasterDb.CriticalParsing.csproj" />
     <ProjectReference Include="..\RolemasterDb.App\RolemasterDb.App.csproj" />
   </ItemGroup>