Subsystem 6a: Item Database + /item /recycle /craft /research calculators + refresh tool (#28)

* feat(itemdata): scaffold ItemData leaf project + dataset records

* feat(itemdata): EmbeddedItemDatabase loads seed bundle by id

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

* feat(itemdata): pure ItemLookup + IItemDatabase.Resolve

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

* test(itemdata): assert prefix-first ordering in ambiguous lookup

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

* feat(itemdata): IItemNameResolver adapter + AddItemData registration

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

* refactor(storagemonitors): use shared ItemData name resolver, drop private items.json

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

* feat(commands): pure item/recycle/craft/research formatters

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

* feat(commands): in-game !item/!recycle/!craft/!research handlers

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

* fix(commands): render ItemDb group in /help (heading key + coverage test)

* feat(commands): /item /recycle /craft /research slash module

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

* feat(itemdata): generator tool + DatasetValidator (offline transform)

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

* chore(itemdata): regenerate full item-data bundle from rustplusplus sources

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

* fix(itemdata): exact-name collisions → Ambiguous; add fail-fast/dup-id/craft-validator tests

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

* docs: document item database feature + generator tool README

---------

Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: HandyS11

README.md

@@ -8,8 +8,9 @@ A self-hosted Discord bot for the Rust+ companion app.
 
 The bot is live: it pairs with Rust+ over FCM, holds a socket per server, and
 auto-provisions its own Discord channels. Pairing/connection, the chat bridge,
-in-game `!commands` and slash surfaces, live map events, and map rendering are all
-shipped. Smart devices and cameras are next.
+in-game `!commands` and slash surfaces, live map events, map rendering, smart
+devices (switches, alarms, storage monitors), and an offline item database with
+recycle/craft/research calculators are all shipped. Cameras are next.
 
 ## Features
 
@@ -47,12 +48,14 @@ configurable per-server prefix (default `!`) and per-command cooldowns:
 - **Server** — `!pop`, `!time`, `!wipe`
 - **Team** — `!online`, `!offline`, `!team`, `!alive`, `!steamid [name]`, `!prox [name]`
 - **Live events** — `!cargo`, `!heli`, `!chinook`, `!small`, `!large`, `!events`
+- **Items** — `!item`, `!recycle`, `!craft`, `!research` (name or id)
 - **Control** — `!mute` / `!unmute` (gate all bot→game output)
 
 ### Slash commands
 
 - **Server data** (ephemeral, with a `server` selector when several are paired) —
   `/pop`, `/time`, `/wipe`, `/online`, `/offline`, `/team`, `/alive`, `/small`, `/large`
+- **Items** (ephemeral) — `/item`, `/recycle`, `/craft`, `/research` (name or id)
 - **Utility** — `/help`, `/uptime`, `/leader` (Manage Server — transfer in-game team leadership)
 - **Admin** — `/setup`, `/workspace reset`, `/workspace simulate-server`
 
@@ -69,6 +72,17 @@ configurable per-server prefix (default `!`) and per-command cooldowns:
   layers — **Grid**, **Markers**, **Monuments**, **Vendor**, **Players**, **Rigs** —
   controlled from a Manage-Server-gated control message.
 
+### Item database & calculators
+
+- An **offline, versioned item dataset** (bundled, ~1200 items) behind one
+  lookup seam, exposing four calculators both in-game and as ephemeral slash
+  commands: item info, recycler yields, craft recipes, and research scrap cost.
+- **Name-or-id lookup** — type a name (case-insensitive, partial), an exact name,
+  or a numeric id; multiple matches return a short "did you mean" list.
+- **Provenance-aware** — each result footers the date its data was sourced, and a
+  maintainer [generator tool](tools/RustPlusBot.ItemData.Generator) regenerates the
+  bundle from upstream (with strict validation) so it never silently rots.
+
 ### Foundation
 
 - Multi-guild, self-hosted, per-guild isolation everywhere; SQLite persistence;
@@ -113,8 +127,14 @@ See [docs/development/running-locally.md](docs/development/running-locally.md).
 | `RustPlusBot.Features.Commands` | In-game `!commands`, slash surfaces, `/help`/`/leader` |
 | `RustPlusBot.Features.Events` | Live map-event classification + `#events` feed |
 | `RustPlusBot.Features.Map` | Map image rendering with toggleable layers |
+| `RustPlusBot.Features.ItemData` | Bundled item dataset, lookup seam, recycle/craft/research data |
 | `RustPlusBot.Host` | Generic Host entry point, DI wiring, startup validation |
 
+The `tools/` folder holds maintainer utilities that are not part of the running
+bot — currently
+[`RustPlusBot.ItemData.Generator`](tools/RustPlusBot.ItemData.Generator), which
+regenerates the embedded item dataset.
+
 ## Roadmap
 
 Subsystems are built in order; each has its own spec → plan → build cycle.
@@ -125,8 +145,9 @@ Subsystems are built in order; each has its own spec → plan → build cycle.
 | 1 | Pairing & connection (FCM, credential pool, hot-swap, auto-failover) | Done |
 | 2 | Map + live events (events feed, oil-rig detection, map render + layers) | Done |
 | 3 | Chat bridge + `!commands` + slash surfaces | Done |
-| 4 | Smart devices | Planned |
+| 4 | Smart devices (switches, alarms, storage monitors) | Done |
 | 5 | Cameras | Planned |
+| 6 | Item database & calculators (recycle/craft/research) | In progress |
 
 ## License
 

RustPlusBot.slnx

@@ -12,19 +12,24 @@
     <Project Path="src/RustPlusBot.Features.Chat/RustPlusBot.Features.Chat.csproj" />
     <Project Path="src/RustPlusBot.Features.Events/RustPlusBot.Features.Events.csproj" />
     <Project Path="src/RustPlusBot.Features.Players/RustPlusBot.Features.Players.csproj" />
+    <Project Path="src/RustPlusBot.Features.ItemData/RustPlusBot.Features.ItemData.csproj" />
     <Project Path="src/RustPlusBot.Features.StorageMonitors/RustPlusBot.Features.StorageMonitors.csproj" />
     <Project Path="src/RustPlusBot.Features.Switches/RustPlusBot.Features.Switches.csproj" />
     <Project Path="src/RustPlusBot.Features.Workspace/RustPlusBot.Features.Workspace.csproj" />
     <Project Path="src/RustPlusBot.Localization/RustPlusBot.Localization.csproj" />
     <Project Path="src/RustPlusBot.Persistence/RustPlusBot.Persistence.csproj" />
   </Folder>
+  <Folder Name="/tools/">
+    <Project Path="tools/RustPlusBot.ItemData.Generator/RustPlusBot.ItemData.Generator.csproj" />
+  </Folder>
   <Folder Name="/tests/">
     <Project Path="tests/RustPlusBot.Abstractions.Tests/RustPlusBot.Abstractions.Tests.csproj" />
     <Project Path="tests/RustPlusBot.Features.Commands.Tests/RustPlusBot.Features.Commands.Tests.csproj" />
     <Project Path="tests/RustPlusBot.Features.Connections.Tests/RustPlusBot.Features.Connections.Tests.csproj" />
     <Project Path="tests/RustPlusBot.Features.Map.Tests/RustPlusBot.Features.Map.Tests.csproj" />
     <Project Path="tests/RustPlusBot.Features.Pairing.Tests/RustPlusBot.Features.Pairing.Tests.csproj" />
     <Project Path="tests/RustPlusBot.Features.Players.Tests/RustPlusBot.Features.Players.Tests.csproj" />
+    <Project Path="tests/RustPlusBot.Features.ItemData.Tests/RustPlusBot.Features.ItemData.Tests.csproj" />
     <Project Path="tests/RustPlusBot.Features.StorageMonitors.Tests/RustPlusBot.Features.StorageMonitors.Tests.csproj" />
     <Project Path="tests/RustPlusBot.Features.Switches.Tests/RustPlusBot.Features.Switches.Tests.csproj" />
     <Project Path="tests/RustPlusBot.Features.Workspace.Tests/RustPlusBot.Features.Workspace.Tests.csproj" />
@@ -33,5 +38,6 @@
     <Project Path="tests/RustPlusBot.Features.Events.Tests/RustPlusBot.Features.Events.Tests.csproj" />
     <Project Path="tests/RustPlusBot.Localization.Tests/RustPlusBot.Localization.Tests.csproj" />
     <Project Path="tests/RustPlusBot.Persistence.Tests/RustPlusBot.Persistence.Tests.csproj" />
+    <Project Path="tests/RustPlusBot.ItemData.Generator.Tests/RustPlusBot.ItemData.Generator.Tests.csproj" />
   </Folder>
 </Solution>

src/RustPlusBot.Features.Commands/CommandServiceCollectionExtensions.cs

@@ -6,6 +6,7 @@
 using RustPlusBot.Features.Commands.Hosting;
 using RustPlusBot.Features.Commands.Leader;
 using RustPlusBot.Features.Commands.Servers;
+using RustPlusBot.Features.ItemData;
 using RustPlusBot.Localization;
 
 namespace RustPlusBot.Features.Commands;
@@ -23,6 +24,7 @@ public static IServiceCollection AddCommands(this IServiceCollection services)
         services.AddSingleton<CommandCooldown>();
         services.AddSingleton<BotUptime>();
         services.AddRustPlusBotLocalization();
+        services.AddItemData();
 
         services.AddScoped<ICommandHandler, MuteCommandHandler>();
         services.AddScoped<ICommandHandler, UnmuteCommandHandler>();
@@ -43,6 +45,10 @@ public static IServiceCollection AddCommands(this IServiceCollection services)
         services.AddScoped<ICommandHandler, EventsCommandHandler>();
         services.AddScoped<ICommandHandler, SmallCommandHandler>();
         services.AddScoped<ICommandHandler, LargeCommandHandler>();
+        services.AddScoped<ICommandHandler, ItemCommandHandler>();
+        services.AddScoped<ICommandHandler, RecycleCommandHandler>();
+        services.AddScoped<ICommandHandler, CraftCommandHandler>();
+        services.AddScoped<ICommandHandler, ResearchCommandHandler>();
 
         services.AddScoped<CommandDispatcher>();
         services.AddHostedService<CommandsHostedService>();

src/RustPlusBot.Features.Commands/Formatting/CraftLine.cs

@@ -0,0 +1,22 @@
+using System.Globalization;
+using RustPlusBot.Features.ItemData.Data;
+using RustPlusBot.Features.ItemData.Naming;
+
+namespace RustPlusBot.Features.Commands.Formatting;
+
+/// <summary>Formats the one-line craft-recipe reply.</summary>
+internal static class CraftLine
+{
+    /// <summary>Formats the ingredients and craft time for an item.</summary>
+    /// <param name="item">The item (must have non-null <see cref="ItemRecord.Craft"/>).</param>
+    /// <param name="names">Resolves ingredient item ids to names.</param>
+    public static string Format(ItemRecord item, IItemNameResolver names)
+    {
+        ArgumentNullException.ThrowIfNull(item);
+        ArgumentNullException.ThrowIfNull(names);
+        ArgumentNullException.ThrowIfNull(item.Craft);
+        var parts = item.Craft.Ingredients
+            .Select(g => string.Create(CultureInfo.InvariantCulture, $"{names.Resolve(g.ItemId)} ×{g.Quantity}"));
+        return string.Create(CultureInfo.InvariantCulture, $"{item.Name}: {string.Join(", ", parts)}");
+    }
+}

src/RustPlusBot.Features.Commands/Formatting/ItemLine.cs

@@ -0,0 +1,20 @@
+using System.Globalization;
+using RustPlusBot.Features.ItemData.Data;
+
+namespace RustPlusBot.Features.Commands.Formatting;
+
+/// <summary>Formats the one-line item lookup card.</summary>
+internal static class ItemLine
+{
+    /// <summary>Formats name, id, stack size, and despawn time.</summary>
+    /// <param name="item">The item to describe.</param>
+    public static string Format(ItemRecord item)
+    {
+        ArgumentNullException.ThrowIfNull(item);
+        var despawn = item.DespawnSeconds is { } seconds
+            ? DurationFormat.Compact(TimeSpan.FromSeconds(seconds))
+            : "—";
+        return string.Create(CultureInfo.InvariantCulture,
+            $"{item.Name} (id {item.Id}) · stack {item.StackSize} · despawn {despawn}");
+    }
+}

src/RustPlusBot.Features.Commands/Formatting/RecycleLine.cs

@@ -0,0 +1,22 @@
+using System.Globalization;
+using RustPlusBot.Features.ItemData.Data;
+using RustPlusBot.Features.ItemData.Naming;
+
+namespace RustPlusBot.Features.Commands.Formatting;
+
+/// <summary>Formats the one-line recycler-yield reply.</summary>
+internal static class RecycleLine
+{
+    /// <summary>Formats the recycler outputs for an item, or a "not recyclable" sentinel via the caller.</summary>
+    /// <param name="item">The item (must have non-null <see cref="ItemRecord.Recycle"/>).</param>
+    /// <param name="names">Resolves output item ids to names.</param>
+    public static string Format(ItemRecord item, IItemNameResolver names)
+    {
+        ArgumentNullException.ThrowIfNull(item);
+        ArgumentNullException.ThrowIfNull(names);
+        ArgumentNullException.ThrowIfNull(item.Recycle);
+        var parts = item.Recycle.Recycler
+            .Select(y => string.Create(CultureInfo.InvariantCulture, $"{names.Resolve(y.ItemId)} ×{y.Quantity}"));
+        return string.Create(CultureInfo.InvariantCulture, $"{item.Name} → {string.Join(", ", parts)}");
+    }
+}

src/RustPlusBot.Features.Commands/Formatting/ResearchLine.cs

@@ -0,0 +1,17 @@
+using System.Globalization;
+using RustPlusBot.Features.ItemData.Data;
+
+namespace RustPlusBot.Features.Commands.Formatting;
+
+/// <summary>Formats the one-line research-cost reply.</summary>
+internal static class ResearchLine
+{
+    /// <summary>Formats the scrap research cost for an item.</summary>
+    /// <param name="item">The item (must have non-null <see cref="ItemRecord.Research"/>).</param>
+    public static string Format(ItemRecord item)
+    {
+        ArgumentNullException.ThrowIfNull(item);
+        ArgumentNullException.ThrowIfNull(item.Research);
+        return string.Create(CultureInfo.InvariantCulture, $"{item.Name}: {item.Research.Scrap} scrap");
+    }
+}

src/RustPlusBot.Features.Commands/Handlers/CraftCommandHandler.cs

@@ -0,0 +1,36 @@
+using RustPlusBot.Features.Commands.Dispatching;
+using RustPlusBot.Features.Commands.Formatting;
+using RustPlusBot.Features.ItemData;
+using RustPlusBot.Features.ItemData.Lookup;
+using RustPlusBot.Features.ItemData.Naming;
+using RustPlusBot.Localization;
+
+namespace RustPlusBot.Features.Commands.Handlers;
+
+/// <summary>!craft — shows the craft recipe for an item.</summary>
+/// <param name="database">The item database.</param>
+/// <param name="names">Resolves ingredient item ids to names.</param>
+/// <param name="localizer">The reply localizer.</param>
+internal sealed class CraftCommandHandler(IItemDatabase database, IItemNameResolver names, ILocalizer localizer)
+    : ICommandHandler
+{
+    /// <inheritdoc />
+    public string Name => "craft";
+
+    /// <inheritdoc />
+    public Task<string?> ExecuteAsync(CommandContext context, CancellationToken cancellationToken)
+    {
+        ArgumentNullException.ThrowIfNull(context);
+        var query = string.Join(' ', context.Args);
+        var reply = database.Resolve(query) switch
+        {
+            ItemMatch.Found { Item.Craft: not null } f =>
+                localizer.Get("command.craft.ok", context.Culture, CraftLine.Format(f.Item, names)),
+            ItemMatch.Found f => localizer.Get("command.craft.none", context.Culture, f.Item.Name),
+            ItemMatch.Ambiguous a => localizer.Get("command.item.ambiguous", context.Culture,
+                string.Join(", ", a.Candidates.Select(c => c.Name))),
+            _ => localizer.Get("command.item.notfound", context.Culture, query),
+        };
+        return Task.FromResult<string?>(reply);
+    }
+}

src/RustPlusBot.Features.Commands/Handlers/ItemCommandHandler.cs

@@ -0,0 +1,31 @@
+using RustPlusBot.Features.Commands.Dispatching;
+using RustPlusBot.Features.Commands.Formatting;
+using RustPlusBot.Features.ItemData;
+using RustPlusBot.Features.ItemData.Lookup;
+using RustPlusBot.Localization;
+
+namespace RustPlusBot.Features.Commands.Handlers;
+
+/// <summary>!item — looks up an item's name, id, stack size, and despawn time.</summary>
+/// <param name="database">The item database.</param>
+/// <param name="localizer">The reply localizer.</param>
+internal sealed class ItemCommandHandler(IItemDatabase database, ILocalizer localizer) : ICommandHandler
+{
+    /// <inheritdoc />
+    public string Name => "item";
+
+    /// <inheritdoc />
+    public Task<string?> ExecuteAsync(CommandContext context, CancellationToken cancellationToken)
+    {
+        ArgumentNullException.ThrowIfNull(context);
+        var query = string.Join(' ', context.Args);
+        var reply = database.Resolve(query) switch
+        {
+            ItemMatch.Found f => localizer.Get("command.item.ok", context.Culture, ItemLine.Format(f.Item)),
+            ItemMatch.Ambiguous a => localizer.Get("command.item.ambiguous", context.Culture,
+                string.Join(", ", a.Candidates.Select(c => c.Name))),
+            _ => localizer.Get("command.item.notfound", context.Culture, query),
+        };
+        return Task.FromResult<string?>(reply);
+    }
+}

src/RustPlusBot.Features.Commands/Handlers/RecycleCommandHandler.cs

@@ -0,0 +1,36 @@
+using RustPlusBot.Features.Commands.Dispatching;
+using RustPlusBot.Features.Commands.Formatting;
+using RustPlusBot.Features.ItemData;
+using RustPlusBot.Features.ItemData.Lookup;
+using RustPlusBot.Features.ItemData.Naming;
+using RustPlusBot.Localization;
+
+namespace RustPlusBot.Features.Commands.Handlers;
+
+/// <summary>!recycle — shows the recycler output for an item.</summary>
+/// <param name="database">The item database.</param>
+/// <param name="names">Resolves output item ids to names.</param>
+/// <param name="localizer">The reply localizer.</param>
+internal sealed class RecycleCommandHandler(IItemDatabase database, IItemNameResolver names, ILocalizer localizer)
+    : ICommandHandler
+{
+    /// <inheritdoc />
+    public string Name => "recycle";
+
+    /// <inheritdoc />
+    public Task<string?> ExecuteAsync(CommandContext context, CancellationToken cancellationToken)
+    {
+        ArgumentNullException.ThrowIfNull(context);
+        var query = string.Join(' ', context.Args);
+        var reply = database.Resolve(query) switch
+        {
+            ItemMatch.Found { Item.Recycle: not null } f =>
+                localizer.Get("command.recycle.ok", context.Culture, RecycleLine.Format(f.Item, names)),
+            ItemMatch.Found f => localizer.Get("command.recycle.none", context.Culture, f.Item.Name),
+            ItemMatch.Ambiguous a => localizer.Get("command.item.ambiguous", context.Culture,
+                string.Join(", ", a.Candidates.Select(c => c.Name))),
+            _ => localizer.Get("command.item.notfound", context.Culture, query),
+        };
+        return Task.FromResult<string?>(reply);
+    }
+}