I build a Tool for Open source Maintainers

Aarish mansur — Mon, 21 Sep 2026 08:28:50 +0000

This is a submission for the Sanity Challenge, Path Two: Vibe-Code Something Strange

What I Built

As someone who is contributing for a good amount of time I noticed a problem as in bigger and legacy codebases a lot of issues are opened daily and honestly maintainers dont have time to give their full attention to every issue.

So I build Mento its an AI powered maintainer is copilot that fetches your GitHub issues generates plain English summaries with urgency scores and runs an intelligent triage pipeline that learns from past decisions to suggest P0–P4 priorities.

The more issues you triage the smarter it gets. Currently its in early development so you dont have to login via Github just bring your LLM key from any router (curently we Provide over 10+ router options )

Demo

Live demo: https://mainto-five.vercel.app/

Code

GitHub repository: https://github.com/AarishMansur/Mainto

My Build Process

I build Mento with OpenCode and Nextjs so I didnt use any wireframes or no planning docs I use Sanity Docs and couple of Prompts which worked for me

I use santity as the agents memory so that every fetched issue, AI summary, triage decision, and learned pattern gets stored as a structured document and the agent reads from them before making it next decision and not forgetting sanity Live colloboration for real time updates and the Presentation Tool to map Studio documents directly to app routes

The more you triage the better it gets

These are some of the prompts I used:

Prompt 1: Product Direction

Build a maintainer focused web app that connects to GitHub repositories and helps open source maintainers understand which issues need attention first. Include repository search, issue cards, AI summaries, urgency scores, suggested actions, and a clean dashboard experience.

Prompt 2: Issue Summaries

Create an AI summarization flow for GitHub issues. Return a structured result containing a concise summary, an urgency score from 1 to 10, three to five key points, and two to three suggested actions. The output should be easy for a maintainer to scan quickly.

Prompt 3: Sanity Data Modeling

Model the Mainto workflow in Sanity. Create document types for GitHub issues, generated issue summaries, historical triage patterns, and maintainer triage decisions. Use references between related documents and include fields for urgency, priority, reasoning, suggested actions, and resolution history.

Prompt 4: Triage Pipeline

Add a workflow pipeline with New, Summarized, Prioritized, In Review, and Resolved stages. Let the AI prioritize issues from P0 to P4 using historical patterns, matching keywords, labels, and previous maintainer decisions.

How I designed my Sanity Schema

GitHub Issue

import { defineField, defineType } from 'sanity'

export const issueType = defineType({
  name: 'issue',
  title: 'GitHub Issue',
  type: 'document',
  fields: [
    defineField({ name: 'githubId', type: 'number', validation: (Rule) => Rule.required() }),
    defineField({ name: 'repoOwner', type: 'string', validation: (Rule) => Rule.required() }),
    defineField({ name: 'repoName', type: 'string', validation: (Rule) => Rule.required() }),
    defineField({ name: 'title', type: 'string', validation: (Rule) => Rule.required() }),
    defineField({ name: 'body', type: 'text' }),
    defineField({ name: 'state', type: 'string', options: { list: [{ title: 'Open', value: 'open' }, { title: 'Closed', value: 'closed' }] } }),
    defineField({ name: 'labels', type: 'array', of: [{ type: 'string' }] }),
    defineField({ name: 'commentsCount', type: 'number' }),
    defineField({ name: 'workflowStatus', type: 'string', initialValue: 'new', options: { list: [
      { title: 'New', value: 'new' },
      { title: 'Summarized', value: 'summarized' },
      { title: 'Prioritized', value: 'prioritized' },
      { title: 'In Review', value: 'in_review' },
      { title: 'Resolved', value: 'resolved' },
    ]}}),
    defineField({ name: 'agentPriority', type: 'string', options: { list: [
      { title: 'P0 - Critical', value: 'P0' },
      { title: 'P1 - High', value: 'P1' },
      { title: 'P2 - Medium', value: 'P2' },
      { title: 'P3 - Low', value: 'P3' },
      { title: 'P4 - Backlog', value: 'P4' },
    ]}}),
    defineField({ name: 'agentReasoning', type: 'text' }),
    defineField({ name: 'matchedPatternIds', type: 'array', of: [{ type: 'reference', to: [{ type: 'triagePattern' }] }] }),
    defineField({ name: 'maintainerDecision', type: 'string', options: { list: [
      { title: 'Accepted', value: 'accepted' },
      { title: 'Overridden Higher', value: 'overridden_higher' },
      { title: 'Overridden Lower', value: 'overridden_lower' },
      { title: 'Pending', value: 'pending' },
    ]}}),
  ],
})

`issueSummary` — AI Generated Summary

export const issueSummaryType = defineType({
  name: 'issueSummary',
  title: 'Issue Summary',
  type: 'document',
  fields: [
    defineField({ name: 'githubId', type: 'number', validation: (Rule) => Rule.required() }),
    defineField({ name: 'summary', type: 'text', validation: (Rule) => Rule.required() }),
    defineField({ name: 'urgencyScore', type: 'number', validation: (Rule) => Rule.min(1).max(10) }),
    defineField({ name: 'keyPoints', type: 'array', of: [{ type: 'string' }] }),
    defineField({ name: 'suggestedActions', type: 'array', of: [{ type: 'string' }] }),
    defineField({ name: 'generatedAt', type: 'datetime' }),
  ],
})

`triagePattern` — Agent Memory

export const triagePatternType = defineType({
  name: 'triagePattern',
  title: 'Triage Pattern',
  type: 'document',
  fields: [
    defineField({ name: 'name', type: 'string', validation: (Rule) => Rule.required() }),
    defineField({ name: 'keywords', type: 'array', of: [{ type: 'string' }] }),
    defineField({ name: 'labels', type: 'array', of: [{ type: 'string' }] }),
    defineField({ name: 'avgUrgency', type: 'number' }),
    defineField({ name: 'typicalPriority', type: 'string' }),
    defineField({ name: 'typicalResolution', type: 'string' }),
    defineField({ name: 'patternCount', type: 'number', initialValue: 0 }),
  ],
})

`triageDecision` — Maintainer Feedback Loop

export const triageDecisionType = defineType({
  name: 'triageDecision',
  title: 'Triage Decision',
  type: 'document',
  fields: [
    defineField({ name: 'issueId', type: 'number', validation: (Rule) => Rule.required() }),
    defineField({ name: 'issueTitle', type: 'string', validation: (Rule) => Rule.required() }),
    defineField({ name: 'priority', type: 'string', validation: (Rule) => Rule.required() }),
    defineField({ name: 'reasoning', type: 'text' }),
    defineField({ name: 'matchedPatternIds', type: 'array', of: [{ type: 'reference', to: [{ type: 'triagePattern' }] }] }),
    defineField({ name: 'resolution', type: 'string' }),
    defineField({ name: 'agentAccuracy', type: 'string', options: { list: [
      { title: 'Correct', value: 'correct' },
      { title: 'Partially Correct', value: 'partial' },
      { title: 'Incorrect', value: 'incorrect' },
    ]}}),
    defineField({ name: 'decidedAt', type: 'datetime' }),
  ],
})

Sanity Project Details

Project ID: vni5slia
Dataset: production (public read)

Agent Session

https://dev.to/agent_sessions/vibe-coding-sanity-hackthon-y8hbb0

DEV Community: Aarish mansur