[GSOC'26] Template Playground: No-Code Smart Contract Authoring for Non-Technical Legal Users

[JiyaGupta-cs]

Problem Statement

Today, authoring smart legal contracts requires knowledge of Concerto models, TemplateMark syntax, and JSON data inputs. This creates a steep learning curve for lawyers and contract managers, whose expertise is legal drafting, not software development.

Proposed Solution

I propose a form-driven, low-code contract authoring layer that allows lawyers and contract managers to define contract structure, variables, and logic without any knowledge of Concerto or TemplateMark.

HIGH-LEVEL FLOW

Lawyer defines contract data using forms
           ↓
Concerto (.cto) model auto-generated (hidden)
           ↓
Create TemplateMark by Inserting form fields
           ↓
Form-based data entry with validation
           ↓
Simulation and execution of smart legal contract

Step 1: Define Contract Data Using Forms (No Concerto Exposure)

Lawyers define contract variables via guided forms (Add Field → Label, Type, Required).

• Example fields: Client Name (Text), Service Fee (Currency), Duration (Number), Effective Date (Date)
• Variable names and Concerto .cto models are auto-generated and hidden
• No syntax, no code, no technical decisions required
  Output: Valid Concerto model generated behind the scenes

Step 2: Draft Legal Text with Assisted TemplateMark

Lawyers write contracts naturally in a Markdown editor with a toolbar option:

• ➕ Insert Contract Field
• Select a field (e.g., Service Fee)
• Choose formatting (e.g., Currency – $)
• System inserts valid TemplateMark ({{serviceFee}}) automatically
  Output: Error-free TemplateMark, correctly linked to the data model

Step 3: Enter Contract Data via Forms (No JSON)

The system auto-generates a dynamic, validated form from the model:

• Text inputs, number fields, date pickers, currency formatting, etc.
• Built-in validation (required fields, data types, constraints)
  Output: Clean, valid contract data ready for execution

Outcomes

• Zero-code smart contract authoring
• Eliminates Concerto, TemplateMark, and JSON learning curve
• Faster drafting, validation, and iteration
• Significantly improved adoption for legal professionals

Skills required/preferred:

React.js, form-driven UI development, low-code/no-code interface design, dynamic form generation, state management, markdown/editor integration, schema-based validation, component-driven architecture, experience with Concerto, TemplateMark, and JSON editors

Possible Mentors:

@mttrbrts @dselman

Expected size of project:

175 hours (medium)

Expected difficulty:

Medium

[sanketshevkar]

Thanks @JiyaGupta-cs

This is interesting, specially something that should be useful for the non-technical community to explore the project.

For me this seems like a completely new project, and I'll bring this up during our discussion for the ideas list.

Just like ideas for ideas list we have to consider resource budgeting and also investing into long term maintenance of the project.

Thanks will let you know once we have a discussion about this.

[JiyaGupta-cs]

@sanketshevkar Thanks! I’m really glad you like the idea
I completely understand the prioritization challenges given the limited mentor bandwidth. If needed, I’d be happy to implement this within the program timeline as well, whether as a short-term or medium-term project, depending on which gets a slot in the programme.

Happy to discuss this in more detail during today’s tech-wg call.