[FIX] No more derived method

README.md

@@ -29,7 +29,6 @@ A Streamlit app for optimizing carbon removal portfolios across different method
   - [Case 1 - Modify existing coefficient values](#case-1--modify-existing-coefficient-values)
   - [Case 2 - Add an existing resource to an existing method](#case-2--add-an-existing-resource-to-an-existing-method)
   - [Case 3 - Add a new CDR method](#case-3--add-a-new-cdr-method)
-  - [(OPTIONAL) Case 3b - Add a derived CDR method](#optional-case-3b--add-a-derived-cdr-method-variant-of-an-existing-method)
   - [Case 4 - Add a new resource](#case-4--add-a-new-resource)
   - [Case 5 - Add a new resource group](#case-5--add-a-new-resource-group-new-category)
   - [Case 6 - Change whether a resource is optional](#case-6--change-whether-a-resource-is-optional-secondary-for-a-method)
@@ -136,6 +135,8 @@ You only need to do this once per machine. After that, just activate the environ
 
 Open `data/inputs_aggregated.csv` in Excel or any spreadsheet editor. Make your changes and save.
 
+> ⚠️ **Commas in names:** if a method name, resource name, or group name contains a comma, the CSV parser will misread it. Wrap the value in double quotes in the CSV (e.g. `"Biochar, pyrolysis"`) or, preferably, avoid commas entirely and use a dash or slash instead.
+
 **Step 3: Open a terminal in the project folder**
 
 You can use any of the following:
@@ -220,7 +221,7 @@ Each row represents **one resource used by one CDR method**, with the following
 |--------|-------------|---------|
 | `Implementation` | Name of the CDR method | `Afforestation` |
 | `Method group` | Category the method belongs to | `Forestry` |
-| `Resource` | Name of the resource used | `Unspecified land` |
+| `Resource` | Name of the resource used | `Other land` |
 | `Resource group` | Category the resource belongs to | `Land` |
 | `Type` | Physical type of the resource | `Physical` |
 | `Unit` | Unit of the coefficient (per MtCO₂) | `Mha/MtCO2` |
@@ -333,62 +334,6 @@ You should see `(venv)` at the start of your terminal line.
    git push
    ```
 
-> ⚠️ **Special case - derived methods:** see Case 3b below.
-
----
-
-### (OPTIONAL) Case 3b - Add a derived CDR method (variant of an existing method)
-
-**What is a derived method?**
-Some methods in the tool are not standalone entries in the CSV: they are automatically generated as **variants** of a base method. For example:
-- `Bio-char` in the CSV → generates 3 variants in the app: `Bio-char - Forest biomass`, `Bio-char - Non-forest biomass`, `Bio-char - Unspecified biomass`
-- `Enhanced weathering` in the CSV → generates 4 variants: one per mineral type
-
-Each variant is identical to the base method **except** it only keeps the resource relevant to that variant.
-
-**When to use:** You want to add a new variant of an existing method (e.g. a new mineral type for Enhanced weathering, or a new biomass type for Bio-char).
-
-> ⚠️ This case requires editing Python code. If you are not comfortable with this, contact the developer - provide the name of the new variant and which resource it should keep, and they can add the 5–10 lines needed.
-
-**Option 1 - On Hugging Face (developers only)**
-
-Hugging Face allows editing Python files inline via the pencil icon. Follow the same steps as Option 2 but make all edits directly in the browser. Not recommended for non-coders.
-
-**Option 2 - Locally**
-
-1. Open `data/inputs_aggregated.csv` and make sure the base method has a row for the new resource.
-
-2. Open `data/generate_model_data.py`. Find the two structures at the top of the file:
-
-   **`REPLACED_BY_DERIVED`**: lists base methods fully replaced by their variants (the base name disappears from the app):
-   ```
-   REPLACED_BY_DERIVED = {"Bio-char", "Enhanced weathering"}
-   ```
-   If your new base method should disappear once variants exist, add its name here.
-
-   **`DERIVED_FROM`**: maps each base method to its list of variant names (in display order):
-   ```
-   DERIVED_FROM = {
-       "Bio-char": ["Bio-char - Forest biomass", ...],
-       "Enhanced weathering": ["Enhanced weathering - Basalt mineral", ...],
-       ...
-   }
-   ```
-   Add the new variant name to the relevant list.
-
-3. Further down in `create_sliders_inputs()`, add the derivation logic for the new variant: copy the pattern used for Bio-char or Enhanced weathering: copy the base method's coefficients, then remove the resources that don't apply to this variant.
-
-4. Save both files and run:
-   ```
-   python data/update.py
-   ```
-5. Commit and push:
-   ```
-   git add -A -- ':!venv/'
-   git commit -m "Add derived method: [variant name]"
-   git push
-   ```
-
 ---
 
 ### Case 4 - Add a new resource