# Prince Client feature coverage

Reference date: **16 October 2026**. Target: **Prince Client 0.3.0**, Minecraft Java **26.1.1**, Java **25**, Fabric Loader **0.19.3**, Fabric API **0.145.4+26.1.1**.

This is a release checklist and source-level inventory, not a claim of full Feather or Lunar parity. Prince currently has **34 implemented module entries: 22 HUD, 10 rendering, and 2 controls**. See [BUILD-VERIFICATION.md](BUILD-VERIFICATION.md) for executed checks and their limits. A settings toggle is counted here only when a rendering, telemetry, or input implementation exists. The delivered product is the Fabric mod only; standalone launchers are outside the user's final scope.

## Reference scope and status

- **F** means the [Feather common-mod reference](https://docs.feathermc.com/server-api/mods/#common-feather-mods): 92 rows observed on the reference date. The page calls these common mods; it is not a complete specification. The [Feather homepage](https://feathermc.com/) also announced migration to Dawn when checked, so this document fixes its comparison to the cited Feather snapshot.
- **L** means [Lunar Apollo mod options](https://lunarclient.dev/apollo/developers/mods/overlaymod): 99 navigation entries observed on the reference date. Some child pages still showed an older 95-entry navigation. This is an API-facing index, not proof that every option exists on every Minecraft version.
- **Core** means Prince implements the named basic behavior. It does **not** mean every vendor setting, display style, or edge case is matched.
- **Partial** means there is a narrower implementation or a related measurement with materially different scope.
- **Missing** means no Prince implementation was found in the inspected source. Vanilla Minecraft behavior does not count as a Prince enhancement.
- **Separate system** means the feature needs additional integration, executable software, network service, or server cooperation. It is not included merely because the mod can show a button for it.

The comparison uses concise feature names rather than vendor descriptions. Missing rows are development backlog, not promises or disabled features available in the current JAR.

## Implemented module inventory

Sources of Prince behavior: [Modules.java](src/main/java/io/prince/client/Modules.java), [PrinceHud.java](src/main/java/io/prince/client/PrinceHud.java), [HudTelemetry.java](src/main/java/io/prince/client/HudTelemetry.java), [FeatureEffects.java](src/main/java/io/prince/client/FeatureEffects.java), and [mixins](src/main/java/io/prince/client/mixin/). Source inspection alone does not verify every runtime scenario; the verification notes identify actual observations.

| Prince module | Comparison | Status and actual scope |
| --- | --- | --- |
| FPS (`FPS`) | F/L FPS | Core: current client frame-rate readout; no frame-rate improvement claim. |
| Coordinates (`COORDINATES`) | F/L Coordinates | Core: XYZ and dimension. |
| Keystrokes (`KEYSTROKES`) | F/L Keystrokes | Core: bound movement, attack, use, and jump keys with pressed state. |
| Click counter (`CPS`) | F/L CPS | Core: separate mouse-button counts over the last second while playing. |
| Ping (`PING`) | F/L Ping | Core: server-reported player latency; no independent network probe or spike history. |
| Armor status (`ARMOR_STATUS`) | F/L Armor Status | Core: four equipped pieces, icons, remaining durability, low-durability colors. |
| Potion effects (`POTION_EFFECTS`) | F/L Potion Effects | Core: active effects, levels and remaining durations. |
| Direction (`DIRECTION`) | F Direction; L DirectionHud | Core: facing and yaw. |
| Clock (`CLOCK`) | F Time; L Clock | Core: local 24-hour time. |
| Speed (`SPEED`) | F Speed Meter; L Momentum | Partial: horizontal blocks/second from client movement; no full movement analysis. |
| Memory (`MEMORY`) | F System Resources; L Memory | Partial: JVM heap used/max only; no CPU, GPU, or whole-system resource monitor. |
| Biome (`BIOME`) | Related world information | Core: current biome name; separate Prince widget. |
| Day counter (`DAY_COUNTER`) | L DayCounter | Core: world clock converted to day number. |
| Server (`SERVER_ADDRESS`) | F/L Server Address | Core: server address or single-player label; respects Minecraft's hidden-address setting. |
| Session time (`PLAYTIME`) | F/L Playtime | Partial: current world session only; no persistent lifetime statistics. |
| Held item (`DURABILITY`) | Related item/armor displays | Core: main-hand name, icon and remaining durability. Does not implement pickup information or inventory tracking. |
| Item counter (`ITEM_COUNTER`) | F/L Item Counter | Partial: inventory total for the held item type; not a configurable multi-item or potion/totem counter. |
| Target info (`TARGET_INFO`) | F Block Indicator / Damage Indicator; L Waila | Partial: looked-at block name/position or entity name and client-known health. No world-space health overlay or full WAILA data providers. |
| Light level (`LIGHT_LEVEL`) | Related F/L light overlay | Partial: numbers at the player's position only. No light-level markings drawn on surrounding blocks. |
| Food status (`SATURATION`) | F/L Saturation | Partial: local hunger/saturation numbers. No food preview, exhaustion meter, or AppleSkin tooltip. Multiplayer saturation can be stale because it is client-reported. |
| Stopwatch (`STOPWATCH`) | F/L Stopwatch | Core: start/pause/reset with a configurable key; monotonic elapsed-time measurement. |
| Reach display (`REACH`) | F/L Reach Display | Partial: distance for the latest client attack event, including non-player entities. It does not prove the server accepted the hit or alter attack reach. |
| Fullbright (`FULLBRIGHT`) | F Brightness; L Lighting | Partial: fixed bright local lightmap; no complete lighting-option suite. |
| Zoom (`ZOOM`) | F/L Zoom | Core: hold the zoom key; adjustable 2–12× factor. No scroll-zoom or cinematic camera controls. |
| Crosshair (`CROSSHAIR`) | F Custom Crosshair; L Crosshair | Partial: cross shape with size, gap, thickness and profile accent. No shape library, target colors, or elytra indicator. |
| Steady damage camera (`NO_HURT_CAM`) | L HurtCam | Partial: removes damage tilt; not a full camera-motion editor. |
| Static FOV (`STATIC_FOV`) | F FOV Changer; L Fov | Partial: suppresses movement FOV changes; no per-action FOV profiles. |
| Local time (`TIME_CHANGER`) | F/L Time Changer | Partial: chosen local hour while retaining day; no server clock change. |
| Clear weather (`WEATHER_CHANGER`) | F/L Weather Changer | Partial: suppresses local rain/thunder visuals and rain particles; no weather selection or server weather control. |
| Low fire (`LOW_FIRE`) | L OverlayMod | Partial: fixed lower first-person fire overlay only. |
| Steady view (`NO_BOBBING`) | Related camera/overlay options | Partial: disables walking view bobbing; no separate hand-only or animation editor. |
| Reduced particles (`PARTICLE_FILTER`) | L ParticleChanger | Partial: uses Minecraft's minimal particle policy locally. No individual particle color, size, opacity, or multiplier controls. |
| Toggle sprint (`TOGGLE_SPRINT`) | F Toggle Sprint; L ToggleSneak | Core: sprint-key toggle with cleanup on disable/profile/world transitions. |
| Toggle sneak (`TOGGLE_SNEAK`) | F Toggle Sprint; L ToggleSneak | Core: sneak-key toggle with cleanup on disable/profile/world transitions. |

The narrower comparisons are intentional: [Lunar Reach Display](https://lunarclient.dev/apollo/developers/mods/reachdisplay), [WAILA](https://lunarclient.dev/apollo/developers/mods/waila), and [Saturation](https://lunarclient.dev/apollo/developers/mods/saturation) expose capabilities beyond these Prince implementations. A basic measurement must not be advertised as the entire corresponding vendor module.

## Prince interface and configuration

| Surface | Implemented source behavior | Remaining scope |
| --- | --- | --- |
| Home and Back navigation | Prince title/home screen, native world/server/settings destinations, local profiles, HUD editor, parent-screen Back and in-world Resume | No account switching, cosmetics store, or private Feather services |
| Module menu | Search, category sidebar, module cards, on/off controls, settings buttons, scrolling/pagination, keyboard search focus | No favorites, per-module toggle hotkeys, or vendor-wide command palette |
| HUD editor | Dragging, arrow movement, scale adjustment, optional panel, reset, screen-edge clamping | No grid snapping, alignment guides, multi-selection, or vanilla-HUD relocation |
| Appearance | Original dark Prince interface, accent presets, HUD text presets, scale and panel controls | No arbitrary color picker, font library, background-opacity slider, or alternate theme system |
| Profiles | Create blank/copy, switch, delete with confirmation, per-profile modules/layout/colors/settings | No account sync, import/export UI, automatic server profiles, or sharing service |
| Persistence | JSON configuration with guarded loading and atomic replacement; legacy properties migration | Rejected files are backed up before replacement; filesystem failures are logged; no user-facing recovery wizard |
| Controls | Minecraft key-binding entries for menu, zoom and stopwatch; existing sprint/sneak keys | No global keybind-search overlay or arbitrary macros |

These are source-level checks of [PrinceScreen](src/main/java/io/prince/client/PrinceScreen.java), [HudEditorScreen](src/main/java/io/prince/client/HudEditorScreen.java), [ModuleSettingsScreen](src/main/java/io/prince/client/ModuleSettingsScreen.java), and [ProfileScreen](src/main/java/io/prince/client/ProfileScreen.java). UI responsiveness, readability, focus behavior, and persistence require game validation; “best UI” is not a measurable release status.

## Missing local features

All entries below are **Missing**, except where the final column explicitly refers to a partial implementation above. Small groups share an implementation area; each named capability still needs its own acceptance check. Source labels refer to the official F/L snapshots above and do not imply identical vendor behavior.

### HUD and interface

| Capability | Reference | Release work remaining |
| --- | --- | --- |
| Attack indicator | F/L | Additional indicator behavior and presentation |
| Armor bar / hearts | F | Vanilla bar modifications |
| Autohide HUD | F | Configurable contextual hiding; Prince currently hides its HUD with vanilla hide-GUI and while screens are open |
| Boss bar / scoreboard / tab list | F/L | Customization of vanilla elements |
| Action bar / locator bar | L | Relocation, scaling and styling |
| Titles / toast control | F/L titles; F toasts | Message/notification presentation controls |
| Combo counter | F/L | Reliable consecutive-hit tracking |
| Cooldowns | L | Cooldown indicators and settings |
| Custom debug screen | F Custom F3; L F3Display | Selectable debug fields and layout |
| Mouse movement / player model | F | Additional HUD visualizations |
| Pack display | F/L | Active resource-pack readout |
| Potion count / totem count | L; related F Totem | Dedicated item selection and counters; current held-item count is insufficient |
| PvP information / item tracker | L | Relevant statistics and tracked-item behavior |
| TPS | F | Qualified server tick-rate estimate |
| Subtitles | F/L | Extra subtitle customization |
| Keybind search / GUI scaling | F search; F/L scaling | Search overlay and game-interface scaling beyond Prince widget scale |
| Dark mode / menu blur | F dark mode; L MenuBlur | Minecraft-wide GUI appearance and actual background blur |
| Advancement screen | F | Expanded advancement interface |

### World rendering and camera

| Capability | Reference | Release work remaining |
| --- | --- | --- |
| Block outline / overlay | F/L | Configurable world-space block rendering |
| Light overlay | F/L | Per-block light display; current player-position numbers are partial only |
| Chunk borders / height limit | L | World-space indicators and related HUD |
| Fog / color saturation | F/L | Independent visual controls |
| Glint customization | F/L | Enchantment-glint rendering controls |
| Hitboxes | F/L | Configurable entity bounding boxes |
| Hit/damage indicators | F; L DamageTint / HitColor | Directional feedback, screen tint and entity-hit colors |
| Freelook / snaplook | F Perspective/Snaplook; L Freelook/Snaplook | Camera orientation independent of aim and fixed-perspective shortcuts |
| Auto perspective / camera utilities | F | Event-based perspective selection and broader camera functions |
| View angles | L | Angle displays/controls beyond Prince's simple facing readout |
| Motion blur | F/L | Temporal rendering effect |
| Nametags / nickname hiding | F/L | Name/skin presentation controls |
| Mob overlay / mob sizing | F overlay; L MobSize | Entity overlays or render scaling |
| Item physics / dropped-item scaling | F/L physics; F UHC Overlay; L ItemCustomizer | Item rendering, animation and scale changes |
| Viewmodel / legacy animations | F ViewModel/Animations; L ItemCustomizer/OneSevenVisuals | Hand placement, first-person animations and separate-hand settings |
| Flat items / 3D skins | L 2dItems/3dSkins | Additional item and skin rendering |
| Loot beams / despawn warning | F | Dropped-item indicators with validated lifetime information |
| Shield / potion visuals | L Shields/ShinyPots | Dedicated visual controls |
| Overlay suite | L OverlayMod | Remaining overlays, texture controls and visibility options; low fire and no bobbing cover only narrow cases |
| Particle editor | L ParticleChanger | Per-type color/opacity/scale/multiplier controls; minimal policy is partial only |

### Controls, inventory and local utilities

| Capability | Reference | Release work remaining |
| --- | --- | --- |
| Auto text / text actions | F Auto Text; L AutoTextHotkey/AutoTextActions | Explicitly configured text/command actions and bindings |
| Chat customization | F/L | Chat presentation and filtering |
| Inventory / drop prevention | F Inventory/Drop Prevention; L InventoryMod | Slot locking, binding and inventory HUD |
| Item information / tooltips | F Item Info/Tooltips; L ScrollableTooltips | Pickup details and tooltip enhancements |
| Container preview | F Shulker Tooltips; L ShulkerPreview | Inspect known container contents |
| Pack organizer | F/L | Resource-pack management UI |
| Horse information / elytra helpers | F Horses/Elytras; L HorseStats | Separate feature sets; no horse stats or swapping helpers currently |
| Death information / reconnect | F | Death details and configurable reconnect behavior |
| Backups / log cleanup | F | Backup/restore and controlled log retention |
| Screenshot tools | F/L | Capture management, editing or upload beyond vanilla screenshots |
| Sound filters / sound replacement / kill sounds | F Sound Filters; L SoundChanger/KillSounds | Distinct audio behaviors and settings |
| Jump-reset feedback / knockback training | F Jump Reset; L KnockbackTrainer | Distinct timing/training measurements |
| Totem extras | F | Additional behavior beyond an item counter |
| Waypoints / minimap | F/L waypoints; L Minimap | Persistent locations, map rendering and world/server separation |
| WorldEdit visualization | L WorldeditCui | Selection visualization and compatible server integration |
| Replay / Rewind | L Replaymod/Rewind | Recording, storage, playback, timeline and export; two distinct systems |

## Server-specific and external integrations

All rows are **Missing / Separate system** in Prince. Server data and permission are requirements where applicable; local toggles cannot provide information the client does not receive.

| Capability | Reference | Dependency to resolve |
| --- | --- | --- |
| Hypixel utilities, Bedwars, statistics and SkyBlock | F Hypixel; L HypixelMod/HypixelBedwars/HypixelStats/Skyblock | Individual server features, data formats/APIs, permitted behavior and version testing; not one generic switch |
| Team tracking / shared markers | F Team Tracker; L TeamView/Markers | Server or authenticated sharing protocol; local data alone cannot locate arbitrary teammates |
| Tier tags | F/L Tier Tagger | Tier provider, identifiers, network handling and provider compatibility |
| TNT timers | F TNT Timer; L TntCountdown | Known fuse data and server-specific behavior; no arbitrary server timing guarantee |
| Quickplay | L | Server-specific actions/navigation |
| Discord presence | F Discord | Separate Discord integration and user-controlled presence |
| Radio / Mumble | L Radio/MumbleLink | External media/voice integration |
| Server APIs | F Server API; L Apollo | Explicit protocol/plugin integration; no claim of impersonating either vendor client |

[Feather's API](https://docs.feathermc.com/server-api/mods/) supports server control of enabled/blocked mods. [Lunar Apollo](https://lunarclient.dev/apollo/developers/modules) has separate modules for server-driven UI, team data, markers, combat rules, waypoints and more. Prince currently implements neither protocol. Similar feature names do not confer vendor-service access.

## Launcher, accounts and services

| Capability | Prince status | Required separate work |
| --- | --- | --- |
| Standalone launcher | Missing | Executable packaging, game/runtime installation, authenticated launch, updates and platform testing |
| Mod/modpack library | Missing | Discovery, download verification, loader/dependency resolution, licensing and version-specific compatibility |
| Friends / presence / cross-server chat | Missing | Identity, authentication, hosted messaging, privacy controls, retention and abuse handling |
| Cosmetics / emotes / skins / store | Missing | Original assets, account ownership, rendering, distribution and any store/payment system; private vendor cosmetics are not transferable by this JAR |
| World/server hosting | Missing | Server lifecycle, networking/proxy/relay capacity, access controls and operational hosting; no free hosting service is bundled |
| Voice chat | Missing | Compatible client/server or relay protocol, microphone controls, audio transport and service operation |
| Cloud profiles / screenshot sharing | Missing | Authenticated storage, sharing permissions and backend operation |

These distinctions follow the [Feather product page](https://feathermc.com/), [Lunar mod-loading guide](https://www.lunarclient.com/news/how-to-add-your-own-mods-to-lunar-client), [Lunar social update](https://www.lunarclient.com/news/lunar-client-monthly-recap-march-2026), [Lunar Hosted Worlds guide](https://www.lunarclient.com/news/maximizing-fun-in-lunar-client-hosted-worlds), and [Lunar account/cosmetics FAQ](https://www.lunarclient.com/faq), checked on the reference date.

## Third-party performance and platform compatibility

Prince does **not** bundle Sodium, Iris, Replay Mod, Noxesium, OptiFine, Phosphor, Simple Voice Chat, SkyblockAddons or Not Enough Updates. Lunar documents several of these in its [mod-loading guide](https://www.lunarclient.com/news/how-to-add-your-own-mods-to-lunar-client) and [client overview](https://www.lunarclient.com/news/what-is-lunar-client); those pages describe vendor integrations, not Prince compatibility. Some articles concern older releases/loaders. Verify exact Minecraft **26.1.1** artifacts, dependencies, licenses and mixin interactions before recommending or packaging any integration.

No FPS uplift, reduced memory footprint, faster chunk loading or performance parity has been benchmarked here. A frame-rate counter, fullbright, and minimal particles are not evidence for a performance claim.

The project is a Fabric **client mod**, not a server plugin, standalone launcher, native Android application, or Bedrock add-on. The build targets the version named at the top. Windows, macOS, Linux, Android Java launchers, gamepad/touch input, alternate GPUs/renderers and third-party mod combinations need their own recorded tests. Successful desktop compilation alone establishes none of those runtime compatibility claims.

## Release sign-off checklist

Leave a box unchecked until fresh evidence for the combined build is recorded in the release verification notes. These are acceptance criteria, not a statement that new tests must be created.

- [ ] Record source/archive identifier, JDK version, exact build command, exit status and final JAR hash.
- [ ] Launch the packaged JAR on the declared Minecraft/Fabric versions; inspect startup and shutdown logs for mixin/render failures.
- [ ] Exercise all 34 module entries in a world, both enabled and disabled; record which behaviors were observed and which remain unverified.
- [ ] Check each HUD against independently observable values; include empty hands/armor, effect expiration, respawn, dimension change, disconnect and reconnect.
- [ ] Verify click-window expiry, stopwatch controls, session reset, held-item totals, and reach behavior; retain the client-data limitations in release notes.
- [ ] Confirm fullbright, zoom, FOV, weather, fire, particles and camera effects visibly restore on disable/profile/world transitions without rewriting vanilla preferences.
- [ ] Check sprint/sneak with menus, profile changes, disconnects and existing vanilla toggle settings; ensure no stuck input.
- [ ] Exercise search, categories, empty results, pagination, sliders, keyboard navigation, HUD dragging/scaling and profile create/copy/delete/cancel at multiple GUI scales and resolutions.
- [ ] Restart after configuration edits and verify persistence; check missing/malformed config and legacy migration without losing unrelated profiles.
- [ ] Record multiplayer limitations and any third-party-mod combinations actually tested; leave other platforms/configurations unverified.
- [ ] Ensure release notes and the public download page match the actual JAR/version and retain partial/missing scope rather than claiming all Feather/Lunar features.

Updating a feature to verified requires a reproducible observation or check result for that feature; a successful compile or a menu toggle alone is insufficient.