#silent-failure

@ref on a private field compiles with only a CS0649 warning — the ref stays null at runtime. Bind to a property instead.

Disjoint file ownership, serialize hot files, report-don't-fix foreign errors, resume after interrupts — the concurrency rules that keep agent waves shippable.

global using Sandbox + your razor namespace in Assembly.cs — without it, panels and game types don't resolve across the assembly.

MP3 + JSON .sound beside it — no wav/ffmpeg; Distance is in inches; copy schema from addons/menu box_open.sound.

Set Sequence.Blending = true once — per-clip fade_in/fade_out times in the vmdl shape the blend; no AnimGraph required.

Headless dotnet build is green while the in-editor compiler emits SB1000 — Environment/IO/Process/reflection are banned in game code.

Jump() helpers clamp against rising velocity, eating the second impulse. Set Velocity.z directly for a reliable double jump.

GameObject.Destroy() in edit mode is deferred; a query fired right after returns the previous build's objects.

Failed package compile leaves the editor running the last-good hotload — multi-symptom 'regressions' are often stale code.

Folders → sbproj → Assembly.cs → 4-object scene → green dotnet build → tagged logs on Play — then optional art tools.

.sbproj + Assets/Code/ProjectSettings/tools layout, 4-object scene + Bootstrap, dotnet build before anything else.

dotnet build reports 0 errors on .razor files the in-editor compiler rejects — the headless build doesn't surface the Razor errors the live editor's Roslyn compiler flags.

Top model plans and reviews; cheaper agents execute on disjoint files; telemetry-driven feel tuning — whitelist and stale-assembly traps included.

WASD as Forward/Backward/Left/Right feeds AnalogMove; new Input.config actions need an editor restart — dotnet build is not enough.

Always handle tr.StartedSolid — ignore that frame so an overlapped body can walk free; slide-trace the wish onto the hit plane.

Scene holds four GameObjects; Bootstrap OnStart builds the world in code — hotloads better, no scene/code drift.

Play full path WITH .sound or bare filename only — partial paths like impact/boing never resolve; compiled assets can still be invisible mid-session.

OfType<IInteractable> on GetAllComponents<Component> returns nothing — enumerate concrete types and union them.

A newly created .razor.scss file is not picked up by a running editor session — the panel component works but is unstyled until the next restart.

[Sync] owner→proxies, IsProxy early-out; FromHost for shared truth — don't NetworkSpawn scene-wide singletons.

Ident is org.package — two lowercase segments; keep Org local until real; never put TODO placeholders in Org or the editor won't boot.

PhysicsShapeList + PhysicsJointList in the vmdl + ModelPhysics toggle — no collapse clips, no SetBoneTransform.

Bone-heat auto-weights fail on AI meshes — use scripted geodesic (along-surface) weights, then FBX + animated vmdl.

OnAwake runs synchronously inside Components.Create — set singletons there; derive from [Property] in OnStart after spawn helpers assign.

Assets / Code / Editor / ProjectSettings / tools — the template every project follows.

Scenes never load raw OBJ/GLB — always wrap with a .vmdl and remap materials under both bare and .vmat names.

DTOs + one spawn path + deterministic static world — guard restored defaults; keep enums append-only.

A component with Enabled = false is invisible to GetAllComponents — search returns null even though the component exists.

Sound playback is a static call, not a component. Use Sound.Play() for 2D and Sound.Play(pos) for 3D, and handle missing events gracefully.

If sbox-launcher.exe stays open during a Steam update, files vanish mid-install — validate via steam://validate/590830.

Model compiler rewrites upper_arm.L → upper_arm_L; physics KV3 that still says .L makes limb bodies unknown while the torso works.

Razor classes get a RootNamespace/folder-derived namespace — declare @namespace and global using or C# can't find your panels.

static Instance set in OnAwake, cleared in OnDestroy — everything reads Foo.Instance with null-guards, no inspector wiring.

SoundEvent has no Looping property — loop via compiled vsnd import options, or re-trigger from code when SoundHandle finishes.

StartupScene is what Play loads; Org must be a valid lowercase ident — placeholders break editor bootstrap, not just publishing.

Many selectors declaring font-size in one SCSS file can make text render as solid filled rectangles — carry hierarchy via font-weight/color instead.

A hand-integrated trace mover has no collider component — ITriggerListener and OnTriggerEnter never fire. Use distance-polling instead.

AI mesh generators (Tripo, Meshy, Rodin) deliver textured OBJ+vmdl — but modeldoc32 headers, ~1m normalize, corrupt textures, bare texture paths, and missing colliders will ERROR the asset until patched.

C# hotloads on alt-tab in ms; scene changes and new Input.config actions need Play/editor restart; failed compile keeps the last-good assembly.

SetIk is AnimGraph-gated; SetBoneTransform is unsound on clip-keyed bones — use proxy props, whole-visual motion, or commit to AnimGraph.

Stats.Increment/SetValue, Leaderboards.GetFromStat, Achievements.Unlock — cheap platform polish; total achievement score capped at 1000.