diff --git a/docs/erd.md b/docs/erd.md
new file mode 100644
index 0000000..86befc7
--- /dev/null
+++ b/docs/erd.md
@@ -0,0 +1,105 @@
+```mermaid
+erDiagram
+    🌱Plant ||--o{ ↔️PlantGroup : "belongs to"
+    🪴Group ||--o{ ↔️PlantGroup : "contains"
+
+    🌱Plant }o--|| 🧬PlantSpecies : "is of"
+
+    🫳Action ||--o{ 📒ActionLog : "logged in"
+    🌱Plant ||--o{ 📒ActionLog : ""
+    🪴Group ||--o{ 📒ActionLog : ""
+    📋MaintenancePlan ||--o{ 📒ActionLog : "logged in"
+
+    📋MaintenancePlan ||--o{ 🗓️MaintenancePlanAction : "has"
+    🫳Action ||--o{ 🗓️MaintenancePlanAction : includes
+
+    🔧Tool ||--o{ ⚙️ToolAction : ""
+    🫳Action ||--o{ ⚙️ToolAction : ""
+
+    🔧Tool ||--o{ 💾ToolAttributeValue : "has attribute with value"
+    🏷️ToolAttribute ||--o{ 💾ToolAttributeValue : "has value"
+
+    %% Entities
+    🌱Plant {
+        int id
+        int species_id
+        string name
+        datetime date_acquired
+    }
+
+    🧬PlantSpecies {
+        int id
+        string name
+        string genus
+        string species
+        string cultivar
+        string variety
+        string authority
+    }
+
+    🪴Group {
+        int id
+        string name
+    }
+
+    ↔️PlantGroup {
+        int id
+        int group_id
+        int plant_id
+    }
+
+    🫳Action {
+        int id
+        string name
+        string description
+    }
+
+    📒ActionLog {
+        int id
+        int action_id
+        int plant_id
+        int group_id
+        int plan_id
+        string notes
+    }
+
+    📋MaintenancePlan {
+        int id
+        int plant_id
+        int group_id
+        int maintenance_plan_action_id
+    }
+
+    🗓️MaintenancePlanAction {
+        int id
+        int maintenance_plan_id
+        int action_id
+        string schedule
+    }
+
+    🔧Tool {
+        int id
+        string name
+        string description
+    }
+
+    ⚙️ToolAction {
+        int id
+        int tool_id
+        int action_id
+    }
+
+    🏷️ToolAttribute {
+        int id
+        string name
+        string description
+    }
+
+    💾ToolAttributeValue {
+        int id
+        int tool_attribute_id
+        int tool_id
+        string value_string
+        float value_number
+    }
+```
\ No newline at end of file
diff --git a/docs/schema-table.md b/docs/schema-table.md
new file mode 100644
index 0000000..9fe62b9
--- /dev/null
+++ b/docs/schema-table.md
@@ -0,0 +1,141 @@
+## Entities
+### `Plant`
+Represents an **individual plant**. Contains instance-specific information and references a shared plant species.
+
+| Attribute | Type | Nullable | Description | Example |
+| - | - | - | - | - |
+| `id` | `int` | NO | Primary key | 15 |
+| `species_id` | `int` | NO | FK to [PlantSpecies](#plantspecies) | 1 |
+| `name` | `string` | YES | Given/nickname for the plant | "Big Fatty" |
+| `date_acquired` | `datetime` | YES | Date acquired | 2025-08-14T14:30:45Z |
+
+---
+
+### `PlantSpecies`
+Represents **species-level data**. Shared, mostly static characteristics for plants of the same type.
+
+| Attribute | Type | Nullable | Description | Example |
+| - | - | - | - | - |
+| `id` | `int` | NO | Primary key | 1 |
+| `name` | `string` | NO | Common name | Sunflower |
+| `genus` | `string` | NO | Genus | *Helianthus* |
+| `species` | `string` | NO | Species | *annuus* |
+| `cultivar` | `string` | YES | Cultivar | |
+| `variety` | `string` | YES | Variety | |
+| `authority` | `string` | YES | Authority name | L. |
+
+---
+
+### `Group`
+Logical grouping of plants (e.g., location, category).
+
+| Attribute | Type | Nullable | Description | Example |
+| - | - | - | - | - |
+| `id` | `int` | NO | Primary key | 3 |
+| `name` | `string` | NO | Group name | "Location: Plant Cart" |
+
+---
+
+### `PlantGroup`
+**Junction table** implementing a many-to-many relationship between [Plant](#plant) and [Group](#group).
+
+| Attribute | Type | Nullable | Description | Example |
+| - | - | - | - | - |
+| `id` | `int` | NO | Primary key | 1 |
+| `group_id` | `int` | NO | FK to [Group](#group) | 3 |
+| `plant_id` | `int` | NO | FK to [Plant](#plant) | 15 |
+
+---
+
+### `Action`
+An **action** is a type of care or maintenance performed on a plant (e.g., watering, fertilizing, pruning).
+
+| Attribute | Type | Nullable | Description | Example |
+| - | - | - | - | - |
+| `id` | `int` | NO | Primary key | 4 |
+| `name` | `string` | NO | Action name | Water |
+| `description` | `string` | YES | Action description | "Give the plant some water" |
+
+---
+
+### `ActionLog`
+Records **which actions** were performed on **which plants or groups**.
+
+| Attribute | Type | Nullable | Description | Example |
+| - | - | - | - | - |
+| `id` | `int` | NO | Primary key | 22 |
+| `action_id` | `int` | NO | FK to [Action](#action) | 4 |
+| `plant_id` | `int` | YES | FK to [Plant](#plant) | NULL |
+| `group_id` | `int` | YES | FK to [Group](#group) | 3 |
+| `plan_id` | `int` | YES | FK to [MaintenancePlan](#maintenanceplan) | NULL |
+| `notes` | `string` | YES | Notes on the action performed | "Dumped 500 gallons of electrolytes" |
+
+---
+
+### `MaintenancePlan`
+Defines a **recurring set of actions** to be applied to a plant or group (e.g., “Water every 15 days”).
+
+| Attribute | Type | Nullable | Description | Example |
+| - | - | - | - | - |
+| `id` | `int` | NO | Primary key | 7 |
+| `plant_id` | `int` | YES | FK to [Plant](#plant) | NULL |
+| `group_id` | `int` | YES | FK to [Group](#group) | 3 |
+| `maintenance_plan_action_id` | `int` | NO | FK to [MaintenancePlanAction](#maintenanceplanaction) | 11 |
+
+---
+
+### `MaintenancePlanAction`
+Links a [MaintenancePlan](#maintenanceplan) to the [Action](#action) to perform and specifies a schedule.
+
+| Attribute | Type | Nullable | Description | Example |
+| - | - | - | - | - |
+| `id` | `int` | NO | Primary key | 11 |
+| `maintenance_plan_id` | `int` | NO | FK to [MaintenancePlan](#maintenanceplan) | 7 |
+| `action_id` | `int` | NO | FK to [Action](#action) | 4 |
+| `schedule` | `string` | NO | Execution interval (CRON format) | `0 0 */2 * *` |
+
+---
+
+### `Tool`
+Represents a **tool** used to complete an action (e.g., “warm water” for a watering action).
+
+| Attribute | Type | Nullable | Description | Example |
+| - | - | - | - | - |
+| `id` | `int` | NO | Primary key | 5 |
+| `name` | `string` | NO | Tool name | Warm Water |
+| `description` | `string` | YES | Tool description | "Like bath water" |
+
+---
+
+### `ToolAction`
+**Junction table** implementing a many-to-many relationship between [Tool](#tool) and [Action](#action).
+
+| Attribute | Type | Nullable | Description | Example |
+| - | - | - | - | - |
+| `id` | `int` | NO | Primary key | 2 |
+| `tool_id` | `int` | NO | FK to [Tool](#tool) | 5 |
+| `action_id` | `int` | NO | FK to [Action](#action) | 4 |
+
+---
+
+### `ToolAttribute`
+Defines a **custom attribute** of a tool (e.g., “pH”, “temperature”).
+
+| Attribute | Type | Nullable | Description | Example |
+| - | - | - | - | - |
+| `id` | `int` | NO | Primary key | 8 |
+| `name` | `string` | NO | Attribute name | Acidity |
+| `description` | `string` | YES | Description of attribute | "Water acidity, measured in pH" |
+
+---
+
+### `ToolAttributeValue`
+Stores the value of a specific [ToolAttribute](#toolattribute) for a given [Tool](#tool).
+
+| Attribute | Type | Nullable | Description | Example |
+| - | - | - | - | - |
+| `id` | `int` | NO | Primary key | 14 |
+| `tool_attribute_id` | `int` | NO | FK to [ToolAttribute](#toolattribute) | 8 |
+| `tool_id` | `int` | NO | FK to [Tool](#tool) | 5 |
+| `value_string` | `string` | YES | Text value | "Slightly acidic" |
+| `value_number` | `float` | YES | Numeric value | 7.0 |
diff --git a/schema.md b/schema.md
deleted file mode 100644
index 3badbb5..0000000
--- a/schema.md
+++ /dev/null
@@ -1,69 +0,0 @@
-# Plant-man overview
-
-## Class: `Plant`
-This class represents the plant to be managed, the fundamental object of our interest around which all of this software revolves. Contains instance-specific info.
-
-| Attribute | Type | Description | Example |
-|-|-|-|-|
-| `id` | `int` | Primary key | 15 |
-| `plant_id` | `int` | Foreign Key | 0 |
-| `name` | `string` | Given name | "Big Fatty" |
-| `date_acquired` | `datetime` | Date acquired | 2025-08-14T14:30:45.0000000
-
----
-
-## Class: `Plant Specification`
-Contains mostly static info about the *species*, which every plant of this type shares
-
-| Attribute | Type | Description | Example |
-|-|-|-|-|
-| `id` | `int` | Primary key | 0 |
-| `name` | `string` | Common Name | Sunflower |
-| `genus` | `string` | Genus | *Helianthus* |
-| `species` | `string` | Species | *annus* |
-| `cultivar` | `string` | Cultivar | |
-| `variety` | `string` | Variety | |
-| `authority` | `string` | Authority | L. |
-
-## Class: `Group`
-This is generic way to logically 'group' plants.
-
-| Attribute | Type | Description | Example |
-|-|-|-|-|
-| `id` | `int` | Primary Key | 0 |
-| `name` | `string` | Given name | Location: Plant cart |
-
----
-
-## Class: `Plant-Group Relationship`
-Records plant group membership. A plant may belong to many groups, and groups may contain many plants.
-
-| Attribute | Type | Description | Example |
-|-|-|-|-|
-| `id` | `int` | Primary key | 0 |
-| `group_id` | `int` | Group ID (fk) | 0 |
-| `plant_id` | `int` | Plant ID (fk)| 15 |
-
----
-
-## Class: `Action`
-An action is work performed on a plant, e.g. watering, fertilizing, pruning, etc.
-
-| Attribute | Type | Description | Example |
-|-|-|-|-|
-| `id` | `int` | Primary key | 0 |
-| `name` | `string` | Name of the Action | Water |
-| `description` | `string` | Describe the action | give the plant some water! |
-
-
-## Class: `Action Log`
-Record which actions were performed on which plant or plant group
-
-| Attribute | Type | Description | Example |
-|-|-|-|-|
-| `id` | `int` | Primary key | 0 |
-| `action_id` | `int` | Action ID (fk) | 0 |
-| `plant_id` | `int` | Plant ID (fk) | null |
-| `group_id` | `int` | Group ID (fk) | 0 |
-| `notes` | `string` | Notes | Dumped 500 gallons of electrolytes on it |
-