New ideaOpen-source consumer tooling

taxfolder (new HBV repo, working name)

An MIT repo of prompts and scripts that lets the AI assistant you already use turn a messy folder of receipts, PDFs and statements into a tax-ready summary, with country packs (Brazil IRPF first).

3 weeks ago · Scored 22 Oct 2026 · ID HBV-261022-H09

Summary

BriefingVerified

POP 5.6 slot: a NEW repo HBV would launch on GitHub (cesarx2) to go viral and earn from derivatives. Template proof: cleanyourtv hit 14,989 stars in 4 days (Verified, GitHub API) by shipping a prompt that any coding assistant follows to fix a universal annoyance; the 22-day PhotoCraft family reached 70K stars (Verified).…

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Hook: 'AI sorted my tax paperwork in 10 minutes, offline, with no upload'. Universal audience (every adult files something), country packs invite contributors, tax season gives a calendar spike. Derivatives: hosted version, per-country SEO pages, paid packs. Existing open-source repos were not checked in detail this run (limited verification).

Description

Repo concept (GitHub cesarx2/taxfolder): PROMPT.md + CLI that scans a local folder, extracts amounts/dates/payees from PDFs and images with a local or API model, classifies by country pack (BR IRPF deductions: health, education, income reports; US schedule items; UK self-assessment), and outputs a CSV/Markdown checklist with missing-document warnings.…

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Local-first, no upload by default. Not tax advice. Global Application: any country via contributor-written packs. LatAm Version: Brazil IRPF pack first (informe de rendimentos, despesas médicas), Mexico SAT pack second; PT-BR/ES README.

Target customer

Self-filers and freelancers in Brazil, Mexico and English markets who already use an AI assistant

Pain

Hunting documents for tax season; privacy concerns about uploads

Why this score

Why it scored lower: Virality and liability

MoatHypothesis

Country packs + contributors. Community packs and trust. Open repo can be forked; Hypothesis.

Demand signals

X posts (7 days)

n/a

Signal trend

n/a

Web demandVerified

cleanyourtv 14,989 stars in 4 days (Verified); PhotoCraft 70,930 stars in 22 days (Verified).

Market and competitors

TAMHypothesisEstimate

$5B+ (Hypothesis) — Consumer tax-prep tooling spend. Method: Hypothesis. Sources: Hark estimate (Hypothesis).

SAMHypothesisEstimate

$60M (Hypothesis) — Brazil/Mexico/Spanish and English self-filers using AI helpers. Method: ~20M x 2% x $15/year ≈ $6M near term; $60M ceiling. Sources: Hark estimate (Hypothesis).

SOMHypothesisEstimate

$40K ARR (Hypothesis) — 12 months after traction. Method: ~1,500 hosted users x ~$25/year; depends on repo stars. Sources: Hark estimate (Hypothesis).

Competitors

Commercial AI tax apps, spreadsheets, accountants, small unverified repos

Business model

Monetization

Open-core: MIT repo; hosted tier, paid packs, sponsor slots, SEO pages

Revenue hypothesis (monthly)Hypothesis

Base ~$1K/month, conservative ~$0/month at 12 months (Hypothesis).

Jobs to be done

When tax season means hunting for documents, I want a checklist built from my own folder, so I can file on time with confidence.

HXC

Fernanda · 38 · Porto Alegre: Keeps PDFs in folders, files IRPF every March. Frustration & buying signal: Dreads the paperwork hunt; would use a free local tool and pay for a hosted one.

Build and go-to-market

Tech stack

Cursor + Vercel + GitHub cesarx2 (one repo); Supabase; Stripe

GTM channels

HN/Reddit/dev.to launch with faceless assets, contributor PRs, per-country SEO; no founder on camera, no paid ads

Risks

Main risk

Virality and liability

All risks

Value Risk: Attention — Hook may not go viral. Next: Test README on HN/Reddit. | Usability Risk: Attention — Non-technical users need an assistant or hosted version. Next: Hosted checkup later. | Feasibility Risk: Attention — Accuracy per country. Next: Start with BR IRPF only. | Viability Risk: Elevated — Tax-advice liability. Next: Strict 'organiser, not advice' copy and legal review.

Next validation step

Prototype repo + README hook; enumerate existing repos; BR pack

Sources

api.github.com https://api.github.com/search/repositories?q=created:%3E2026-09-20&sort=stars&per_page=30 https://clauday.com/article/13a24602-c681-4a09-9609-9cc6e08d626f

github-new, tax, local-first, open-source, consumer, idea, new, below-bar

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# Briefing: taxfolder (new HBV repo, working name)

Source: Startup Ideas HQ (HB Ventures), found 2026-10-22. ProductBots Opportunity Score: 63/100, evidence confidence 33%.
Evidence labels (Verified, Self-reported, Hypothesis) are kept as written by the researcher.

## Goal for ProductBots.ai
Turn this idea into a validated MVP plan and a first build. Start from the next validation step; do not assume unlabelled numbers are verified.

## What it is
An MIT repo of prompts and scripts that lets the AI assistant you already use turn a messy folder of receipts, PDFs and statements into a tax-ready summary, with country packs (Brazil IRPF first).

POP 5.6 slot: a NEW repo HBV would launch on GitHub (cesarx2) to go viral and earn from derivatives. Template proof: cleanyourtv hit 14,989 stars in 4 days (Verified, GitHub API) by shipping a prompt that any coding assistant follows to fix a universal annoyance; the 22-day PhotoCraft family reached 70K stars (Verified). Hook: 'AI sorted my tax paperwork in 10 minutes, offline, with no upload'. Universal audience (every adult files something), country packs invite contributors, tax season gives a calendar spike. Derivatives: hosted version, per-country SEO pages, paid packs. Existing open-source repos were not checked in detail this run (limited verification).

## Customer and pain
Target customer: Self-filers and freelancers in Brazil, Mexico and English markets who already use an AI assistant
Pain: Hunting documents for tax season; privacy concerns about uploads

## Market and competitors
TAM: $5B+ (Hypothesis) — Consumer tax-prep tooling spend. Method: Hypothesis. Sources: Hark estimate (Hypothesis).
SAM: $60M (Hypothesis) — Brazil/Mexico/Spanish and English self-filers using AI helpers. Method: ~20M x 2% x $15/year ≈ $6M near term; $60M ceiling. Sources: Hark estimate (Hypothesis).
SOM: $40K ARR (Hypothesis) — 12 months after traction. Method: ~1,500 hosted users x ~$25/year; depends on repo stars. Sources: Hark estimate (Hypothesis).
Competitors: Commercial AI tax apps, spreadsheets, accountants, small unverified repos
Geography: Global except China; Brazil IRPF first

## Business model
Monetization: Open-core: MIT repo; hosted tier, paid packs, sponsor slots, SEO pages
Revenue hypothesis (monthly): Base ~$1K/month, conservative ~$0/month at 12 months (Hypothesis).

## Build and go-to-market
Build effort (agent-weeks): 2
Time to first revenue: 6-8 weeks (derivative revenue)
Tech stack: Cursor + Vercel + GitHub cesarx2 (one repo); Supabase; Stripe
GTM channels: HN/Reddit/dev.to launch with faceless assets, contributor PRs, per-country SEO; no founder on camera, no paid ads

## Risks and next step
Main risk: Virality and liability
Next validation action: Prototype repo + README hook; enumerate existing repos; BR pack

## Sources
https://api.github.com/repos/Gathin23/cleanyourtv https://api.github.com/search/repositories?q=created:%3E2026-09-20&sort=stars&per_page=30 https://clauday.com/article/13a24602-c681-4a09-9609-9cc6e08d626f

Research, not investment advice. Numbers keep the label they were published with.