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Moat or Bloat

CF Focus

AI blocker for competitive programming that blocks AI platforms during coding practice

Browser extension Rated 7 Oct 2026Dormant

Link
chromewebstore.google.com/detail/obkgjknggnkpboahhaeieemknmpngmpl
Built by
Bytephilosopher

Bloat

152/500

Where it landed on the scale

Bloat
0
Float
300
Moat
400

Summary

CF Focus is a working, published Chrome extension with a clear idea and a thoughtful hint-unlock mechanic. It's free, has no payment path, and was last updated in May with no activity since. It's a solid small tool, but easy to copy and unlikely to become a business as it stands.

Bloat · Not much here works or looks likely to last, yet.

Breakdown

Five measures, 100 points each. Open the receipts under any of them to see the posts and pages behind the points.

Viability

Is there a real problem, someone who would pay, and a market this builder can actually reach?

The problem is real for people practicing competitive programming, but the extension is free with no pricing or payment path, and the audience of people who want to block themselves is narrow.

24/100

Rubric 21–40A real problem, but no plausible path to anyone paying, or a market well out of this builder's reach.

Receipts (2)

  1. Listing describes a real self-discipline use case but shows no pricing and no payment provider.

    Checked 7 Oct 2026 · chromewebstore.google.com/detail/obkgjknggnkpboahhaeieemknmpngmpl (opens in a new tab)

  2. The creator built it to fix their own habit of turning to LLMs and only asks for feedback and reviews, not payment.

    “I always struggle to solve problems, and these days I just turn to LLMs to solve them. That's where the idea of building this extension came from. I built this about a month before I published it as a Chrome extension. It helped me a lot through the process, and I hope you enjoy it as well. There are a lot of features I am thinking of, and there are some things to be fixed. I will get back to it a”

    Post · @byte_philosopher · 25 May 2026 · open on Telegram (opens in a new tab)

Moat

What stops someone copying it?

It's a small extension (about 50 KiB) built on standard Chrome APIs, and someone here could rebuild it in a weekend. The hint timeline and settings are nice touches but nothing compounds.

12/100

Rubric 0–20A thin wrapper or a clone that anyone here could rebuild in a weekend.

Receipts (2)

  1. Size is 50.33KiB, with no server, accounts or data, so there's nothing proprietary to protect.

    Checked 7 Oct 2026 · chromewebstore.google.com/detail/obkgjknggnkpboahhaeieemknmpngmpl (opens in a new tab)

  2. The privacy policy confirms it runs on local storage and declarativeNetRequest only, which anyone can reproduce.

    Checked 7 Oct 2026 · gist.github.com/BytePhilosopher/76f59b9696dcfe0f3941c64074578f42 (opens in a new tab)

Momentum

Did the updates keep coming?

Three posts across six days in May, with the single release on May 25 and nothing since. That's 129 days quiet, though the creator said work would resume after exams.

0/100

  • Sustained shipping0/60

    Worked on across 6 days.

  • Consistency0/40

    Updates in 1 of 1 month.

  • Quiet

    No update for 129 days, so scaled to 46%.

Receipts (2)

  1. Earliest post about it.

    “Introducing CF Focus — AI Blocker for Competitive Programming CF Focus is a Chrome extension designed for competitive programmers who want to improve real problem-solving skills without instantly relying on AI tools. The extension automatically blocks AI platforms such as ChatGPT, Claude, Gemini, and others whenever you open platforms like Codeforces and LeetCode Key features include: • Automat”

    Post · @byte_philosopher · 25 May 2026 · open on Telegram (opens in a new tab)

  2. Most recent post about it.

    “May Recap - Finished my side project and released it - Went hiking and visited Zewditu Orphan Center - Started being active on X - We reached 800🎉 - Started hitting the gym - Went to Monastery - Over 1,000 commits on GitHub - Completed weekly ML projects - Met a lot of amazing and lovely people(networking) - tried to manage my meals to be healthy( more protein) -finished A2SV education first pha”

    Post · @byte_philosopher · 31 May 2026 · open on Telegram (opens in a new tab)

Infrastructure

Does a real, working product exist?

A real, live extension on the Chrome Web Store that does what it says, with a privacy policy and a clear feature set. It's compact and single-purpose, with no backend or accounts.

63/100

  • It's live20/20

    https://chromewebstore.google.com/detail/obkgjknggnkpboahhaeieemknmpngmpl?utm_source=item-share-cb responded when checked.

  • HTTPS5/5

    Served over HTTPS.

  • Real product25/35

    A working, published extension with several features (auto-blocking, progressive hints, focus sessions, scheduling, PIN lock, stats). It's a small single-purpose tool at version 1.0.0, so it counts as working but thin.

  • Own home10/10

    Has a store listing.

  • Maintained0/15

    Last sign of shipping 2026-05-31.

  • Operations3/15

    There's a privacy policy and a store listing, and the creator posted a GitHub repo. But there's no backend, accounts, docs site, API or status page, and it's one platform only.

Receipts (5)

  1. https://chromewebstore.google.com/detail/obkgjknggnkpboahhaeieemknmpngmpl?utm_source=item-share-cb responded when checked.

    Checked 7 Oct 2026 · chromewebstore.google.com/detail/obkgjknggnkpboahhaeieemknmpngmpl (opens in a new tab)

  2. Live store listing details the features, with 20 users and 7 ratings of 5.0.

    Checked 7 Oct 2026 · chromewebstore.google.com/detail/obkgjknggnkpboahhaeieemknmpngmpl (opens in a new tab)

  3. Lists the feature set, including hint unlock, Hardcore mode, streaks and custom platforms.

    “Introducing CF Focus — AI Blocker for Competitive Programming CF Focus is a Chrome extension designed for competitive programmers who want to improve real problem-solving skills without instantly relying on AI tools. The extension automatically blocks AI platforms such as ChatGPT, Claude, Gemini, and others whenever you open platforms like Codeforces and LeetCode Key features include: • Automat”

    Post · @byte_philosopher · 25 May 2026 · open on Telegram (opens in a new tab)

  4. Privacy policy is hosted as a secret gist rather than on a dedicated site.

    Checked 7 Oct 2026 · gist.github.com/BytePhilosopher/76f59b9696dcfe0f3941c64074578f42 (opens in a new tab)

  5. Says there's no remote server and no account required, so there are no backend operations.

    Checked 7 Oct 2026 · chromewebstore.google.com/detail/obkgjknggnkpboahhaeieemknmpngmpl (opens in a new tab)

Sustainability

Is it being set up to last?

Distribution through the Chrome Web Store is real, but there's no payment path, no pricing and no revenue. Commitment is a solo builder with plans but no recent updates, so it reads as a good portfolio piece more than a sustaining product.

53/100

  • Distribution30/30

    Listed on the Chrome Web Store.

  • Payments0/15

    No payment provider found.

  • Pricing0/10

    No pricing found on the site.

  • Revenue0/5

    Nothing in the posts or listing shows paying customers or revenue. The extension is free and the only money mentioned is a friend covering the developer account fee.

  • Privacy policy7/7

    Has a privacy policy.

  • Terms5/5

    Has terms of service.

  • Support8/8

    A way to reach support.

  • Commitment3/20

    It's a solo project. The creator says more features are planned after exams, but there's been no update since May 25 and no dedicated channel or team.

Receipts (6)

  1. Listed on the Chrome Web Store.

    Checked 7 Oct 2026 · chromewebstore.google.com/detail/obkgjknggnkpboahhaeieemknmpngmpl (opens in a new tab)

  2. Has a privacy policy.

    Checked 7 Oct 2026 · gist.github.com/BytePhilosopher/76f59b9696dcfe0f3941c64074578f42 (opens in a new tab)

  3. The only payment mentioned is a one-time gift for the Chrome developer account.

    “I always struggle to solve problems, and these days I just turn to LLMs to solve them. That's where the idea of building this extension came from. I built this about a month before I published it as a Chrome extension. It helped me a lot through the process, and I hope you enjoy it as well. There are a lot of features I am thinking of, and there are some things to be fixed. I will get back to it a”

    Post · @byte_philosopher · 25 May 2026 · open on Telegram (opens in a new tab)

  4. Says there are features to add and fixes to make after final exams, but no roadmap is given.

    “I always struggle to solve problems, and these days I just turn to LLMs to solve them. That's where the idea of building this extension came from. I built this about a month before I published it as a Chrome extension. It helped me a lot through the process, and I hope you enjoy it as well. There are a lot of features I am thinking of, and there are some things to be fixed. I will get back to it a”

    Post · @byte_philosopher · 25 May 2026 · open on Telegram (opens in a new tab)

  5. Version 1.0.0, last updated May 25, 2026, with no later release.

    Checked 7 Oct 2026 · chromewebstore.google.com/detail/obkgjknggnkpboahhaeieemknmpngmpl (opens in a new tab)

  6. Calls itself a finished side project and lists 'a lot of failed projects' among weaknesses.

    “May Recap - Finished my side project and released it - Went hiking and visited Zewditu Orphan Center - Started being active on X - We reached 800🎉 - Started hitting the gym - Went to Monastery - Over 1,000 commits on GitHub - Completed weekly ML projects - Met a lot of amazing and lovely people(networking) - tried to manage my meals to be healthy( more protein) -finished A2SV education first pha”

    Post · @byte_philosopher · 31 May 2026 · open on Telegram (opens in a new tab)