Fold Godot physics research into catalog and docs.

Add provenance hygiene, a Godot budget stack guide, and free Godot add-on entries; enrich Kenney, Sonniss, and Freesound notes.

Co-authored-by: Cursor <cursoragent@cursor.com>

Author: TMHSDigital

CONTRIBUTING.md

@@ -6,7 +6,8 @@ This repo catalogs **links and metadata** for free (preferably commercially usab
 
 - Asset libraries, packs, and aggregators with a clear free tier
 - Tools useful for creating or processing game assets
-- Engines/plugins only when they ship substantial free asset libraries
+- Free engine add-ons / plugins that materially help asset or production pipelines (e.g. Godot Asset Library tools)
+- Engines only when they ship substantial free asset libraries
 
 ## What does not
 
@@ -37,6 +38,7 @@ This repo catalogs **links and metadata** for free (preferably commercially usab
 - [ ] Commercial use explicitly allowed (or marked false)
 - [ ] Attribution / share-alike / NC / ND flags recorded
 - [ ] Marketplace EULA checked if Unity/Fab/Unreal/itch
+- [ ] Supplier looks reputable (not an anonymous laundering risk — see [`docs/provenance.md`](docs/provenance.md))
 - [ ] Entry does not claim rights we don’t have
 
 ## Research notes

README.md

@@ -12,7 +12,8 @@ This repository **indexes and documents** sources. It does **not** rehost third-
 - [Quick start](#quick-start)
 - [How entries work](#how-entries-work)
 - [Safe starting points](#safe-starting-points)
-- [Licenses](#licenses)
+- [Licenses & provenance](#licenses--provenance)
+- [Godot-oriented stack](#godot-oriented-stack)
 - [Scope](#scope)
 - [Contributing](#contributing)
 - [Repository layout](#repository-layout)
@@ -30,7 +31,7 @@ This repository **indexes and documents** sources. It does **not** rehost third-
 | **Animation** | MoCap databases & character clips | [`catalog/animation/`](catalog/animation/) |
 | **Shaders & VFX** | Shaders, particle/FX resources | [`catalog/shaders-vfx/`](catalog/shaders-vfx/) |
 | **Fonts** | OFL and commercial-ok typefaces | [`catalog/fonts/`](catalog/fonts/) |
-| **Tools** | Editors & asset pipeline utilities | [`catalog/tools/`](catalog/tools/) |
+| **Tools** | Editors, pipeline utilities, Godot add-ons | [`catalog/tools/`](catalog/tools/) |
 
 Master index: [`catalog/README.md`](catalog/README.md)
 
@@ -89,18 +90,25 @@ High-signal CC0 / clearly permissive sources that cover most early production ne
 
 ---
 
-## Licenses
+## Licenses & provenance
 
-Read [`docs/licenses.md`](docs/licenses.md) before mixing packs into a commercial build. Short version:
+Read [`docs/licenses.md`](docs/licenses.md) and [`docs/provenance.md`](docs/provenance.md) before mixing packs into a commercial build. Short version:
 
 - **CC0** — safest default for closed-source games; attribution not required
 - **CC-BY** — commercial OK; keep credits
 - **CC-BY-SA** — commercial OK with caveats; prefer extractable asset bundles over encrypting SA files into the binary
 - **SIL OFL** — preferred for fonts embedded in games
 - **Marketplace “free”** (Unity / Fab / Unreal / many itch packs) — engine or pack EULA applies; do not rehost
+- **Trust the supplier** — anonymous “CC0” mega-dumps can be license-laundered rips; prefer known creators and keep a paper trail
 
 Catalog metadata in *this* repo is CC0. Linked assets remain under their own licenses.
 
+## Godot-oriented stack
+
+Research-backed shortlist for Godot 4 projects (Kenney industrial/tech kits, Sonniss/Freesound audio, Phantom Camera, Input Helper, Dialogic, GodotSteam, Mod Loader, etc.):
+
+→ [`docs/godot-budget-stack.md`](docs/godot-budget-stack.md)
+
 ---
 
 ## Scope
@@ -135,7 +143,9 @@ See [`CONTRIBUTING.md`](CONTRIBUTING.md) for the entry checklist and verificatio
 ├── CONTRIBUTING.md        ← how to add / verify entries
 ├── LICENSE                ← CC0 for catalog metadata & docs
 ├── docs/
-│   └── licenses.md        ← license cheat sheet
+│   ├── licenses.md        ← license cheat sheet
+│   ├── provenance.md      ← license-laundering / paper trail
+│   └── godot-budget-stack.md
 └── catalog/
     ├── TEMPLATE.md        ← copy this for new entries
     ├── 3d/  2d/  audio/  animation/

catalog/3d/kenney.md

@@ -15,9 +15,10 @@ status: active
 
 # Kenney
 
-40k+ modular low-poly models, environments, UI, and more under CC0. Consistent grid sizing makes prototyping fast across engines.
+40k+ modular low-poly models, environments, UI, and more under CC0. Consistent grid sizing makes prototyping fast across engines. Long-standing reputable supplier — preferred over anonymous “CC0” dumps.
 
 ## Notes
 
 - Excellent default for jams and vertical slices
+- **Space Kit** and **Industrial Kit** are strong for tech/server-room props (racks, pipes, consoles) and flat-shaded pipelines
 - Also ships 2D / audio packs — still catalogued under `3d` as the flagship library

catalog/README.md

@@ -10,6 +10,8 @@ One markdown file per source under a category folder. Copy [`TEMPLATE.md`](TEMPL
 | Animation | [`animation/`](animation/) | MoCap, character clips |
 | Shaders & VFX | [`shaders-vfx/`](shaders-vfx/) | Shaders, particle textures, FX |
 | Fonts | [`fonts/`](fonts/) | OFL / commercial-ok type |
-| Tools | [`tools/`](tools/) | Editors & asset pipeline tools |
+| Tools | [`tools/`](tools/) | Editors, pipeline tools, Godot add-ons |
+
+Guides: [`docs/licenses.md`](../docs/licenses.md) · [`docs/provenance.md`](../docs/provenance.md) · [`docs/godot-budget-stack.md`](../docs/godot-budget-stack.md)
 
 Status legend: `active` = license spot-checked · `needs-review` = useful but verify before shipping · `deprecated` = keep for history only.

catalog/audio/freesound.md

@@ -16,3 +16,8 @@ status: needs-review
 # Freesound
 
 Huge community audio library. **Filter to CC0** (or accept CC-BY with credits). Mixed CC-BY-SA/NC uploads will bite commercial projects.
+
+## Notes
+
+- Strong for granular tech foley when CC0-filtered: HDD whir, server fans, electrical sparks, UI clicks
+- Always open the individual sound’s license before packaging — search filters are not a legal guarantee

catalog/audio/sonniss-gdc.md

@@ -15,4 +15,10 @@ status: active
 
 # Sonniss #GameAudioGDC
 
-Annual professional SFX dumps (multi‑GB). Royalty-free for games; standalone resale and AI/ML training typically forbidden. Read [current license](https://sonniss.com/gdc-bundle-license/).
+Annual professional SFX dumps (multi‑GB). Royalty-free for games; typically **no attribution**. Standalone resale and **AI/ML training are prohibited** under the bundle terms.
+
+## Notes
+
+- Bundle hub: [sonniss.com/gameaudiogdc](https://sonniss.com/gameaudiogdc/) · seasonal portal often at [gdc.sonniss.com](https://gdc.sonniss.com/)
+- License: [gdc-bundle-license](https://sonniss.com/gdc-bundle-license/)
+- Sonniss also sells small paid impact packs (metal/glass/destruction) — useful, but not free; not catalogued as free entries here

catalog/tools/README.md

@@ -1,10 +1,25 @@
 # Tools — asset creation & pipeline
 
-These are editors/utilities, not asset packs. Tool license ≠ license of art you create with them.
+These are editors/utilities and free engine add-ons, not asset packs. Tool license ≠ license of art you create with them.
+
+## Editors & creation
 
 | ID | Name | License | Status |
 | --- | --- | --- | --- |
 | [blockbench](blockbench.md) | Blockbench | GPL-3.0 | active |
 | [ldtk](ldtk.md) | LDtk | MIT | active |
 | [pixelorama](pixelorama.md) | Pixelorama | MIT | active |
 | [material-maker](material-maker.md) | Material Maker | MIT | active |
+
+## Godot 4 add-ons
+
+| ID | Name | License | Status |
+| --- | --- | --- | --- |
+| [phantom-camera](phantom-camera.md) | Phantom Camera | MIT | active |
+| [godot-guide](godot-guide.md) | G.U.I.D.E. | MIT | active |
+| [godot-input-helper](godot-input-helper.md) | Input Helper | MIT | active |
+| [dialogic](dialogic.md) | Dialogic | MIT | active |
+| [godot-mod-loader](godot-mod-loader.md) | Godot Mod Loader | MIT | active |
+| [godotsteam](godotsteam.md) | GodotSteam | custom | needs-review |
+
+See also: [`docs/godot-budget-stack.md`](../../docs/godot-budget-stack.md).

catalog/tools/dialogic.md

@@ -0,0 +1,18 @@
+---
+id: dialogic
+name: Dialogic
+url: https://github.com/dialogic-godot/dialogic
+category: tools
+subcategories: [godot, dialogue, ui]
+license: MIT
+commercial: true
+attribution_required: false
+formats: [godot-addon]
+tags: [godot-4, dialogue, timeline]
+verified: 2026-07-19
+status: active
+---
+
+# Dialogic
+
+Visual dialogue and timeline editor for Godot 4. Useful for in-game notifications, tickets, or narrative UI without building a dialogue system from scratch.

catalog/tools/godot-guide.md

@@ -0,0 +1,18 @@
+---
+id: godot-guide
+name: G.U.I.D.E.
+url: https://github.com/godotneers/G.U.I.D.E
+category: tools
+subcategories: [godot, input]
+license: MIT
+commercial: true
+attribution_required: false
+formats: [godot-addon]
+tags: [godot-4, input, remapping, steam-deck]
+verified: 2026-07-19
+status: active
+---
+
+# G.U.I.D.E.
+
+Godot Unified Input Detection Engine — structured input mapping/remapping for Godot 4. Helpful for controller configs and Steam Deck–friendly rebinding.

catalog/tools/godot-input-helper.md

@@ -0,0 +1,18 @@
+---
+id: godot-input-helper
+name: Godot Input Helper
+url: https://github.com/nathanhoad/godot_input_helper
+category: tools
+subcategories: [godot, input]
+license: MIT
+commercial: true
+attribution_required: false
+formats: [godot-addon]
+tags: [godot-4, input, gamepad, rumble]
+verified: 2026-07-19
+status: active
+---
+
+# Godot Input Helper
+
+Lightweight Godot input utility (Nathan Hoad): device swap detection, prompt helpers, and gamepad rumble support.