slopus--happy/docs/current-community.md

Happy User Deep Dive — Full Analysis

Generated 2026-04-12. Data: 502 unique contributors, 497 issues, 296 PRs, 17,782 stars.

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Executive Summary

Happy has 502 unique external contributors across 793 issues+PRs. The userbase is truly global — roughly 35% East Asian (China, Japan, Korea, HK), 40% Western (US, Europe, AU), 15% South/Southeast Asian, 10% other. Activity peaked in mid-February 2026 (43 new users/week) and has stabilized at ~27 new users/week.

Founders: Kirill Dubovitskiy (bra1nDump), Steve Korshakov (ex3ndr / ex3ndr-bot), and the GrocerPublishAgent system (PeoplesGrocers LLC). All three are excluded from "external contributor" counts below unless otherwise noted.

The most striking finding: Happy's contributor list reads like a who's-who of developer tools. Instagram's first engineer, OpenAI's ChatGPT team, Meta EMs, CMU robotics professors, the Kubeflow co-founder, Meteor/Apollo core engineers, the ReactiveUI creator, LAION/img2dataset builders, and the KernelSU creator (16K stars) all use or contribute to Happy.

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Growth Timeline

Week          New Users  Cumulative
2025-07-21:      2         2     ██
2025-08-18:      2         5     ██
2025-09-01:      3         9     ███
2025-11-03:      8        23     ████████        ← First real growth
2025-11-17:     12        38     ████████████
2025-12-29:     28       112     ████████████████████████████  ← Holiday spike
2026-01-12:     24       159     ████████████████████████
2026-02-09:     42       275     ██████████████████████████████████████████  ← PEAK
2026-02-16:     43       318     ███████████████████████████████████████████
2026-03-30:     31       475     ███████████████████████████████
2026-04-06:     27       502     ███████████████████████████

Key inflection points:

• Jul-Sep 2025: Founding era. 12 users. Mostly direct network (dvlkv, vzhovnitsky, kamal, etc.)
• Nov 2025: First real growth wave (~35 new users). Product discovered by broader audience.
• Dec 2025-Jan 2026: Steady growth. Self-hosting & Docker interest emerges.
• Feb 2026: EXPLOSIVE growth. 150+ new users in one month. Peak engagement.
• Mar-Apr 2026: Maturation. Growth stabilizes but still healthy (~27/week).

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Monthly Activity

Month	Issues	PRs	Total	Unique Users
2025-07	0	3	3	3
2025-08	0	4	4	3
2025-09	0	8	8	6
2025-10	0	2	2	1
2025-11	36	4	40	36
2025-12	44	27	71	51
2026-01	103	45	148	113
2026-02	175	105	280	158
2026-03	88	74	162	115
2026-04	51	24	75	55

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Contributor Type Distribution

• Issue reporters only: 352 (70%) — Users who found bugs / requested features
• PR authors only: 115 (23%) — Code contributors
• Both issues & PRs: 35 (7%) — Deeply engaged contributors

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Contribution Topic Areas

Topic	Count	Notes
Session Management	158	#1 concern — daemon, tmux, lifecycle
Mobile/iOS/Android	116	Core mobile UX
Codex Integration	99	Multi-agent support (Codex, Gemini, Kimi, OpenCode)
UI/UX	80	Buttons, sidebar, scroll, layout
MCP/Protocol	49	MCP server compat, ACP protocol
Voice/Audio	31	ElevenLabs, Whisper, voice agents
Windows	29	Platform compatibility
Docker/Deploy	20	Self-hosting
Security	20	XSS, CORS, encryption, auth
i18n/Languages	16	Chinese, Japanese, Italian, Korean
Self-hosting	15	Docker compose, local deployment
Performance	6	N+1 queries, latency

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Retention Analysis

Only 28 of 502 contributors (5.6%) returned in a second month. The power users who stuck around:

User	Months Active	Span
LightYear512	4 months	Jan-Apr 2026
denysvitali	4 months	Sep 2025-Feb 2026
ahundt	4 months	Nov 2025-Mar 2026
theflysurfer	3 months	Jan-Mar 2026
chaehyun2	3 months	Feb-Apr 2026
cruzanstx	3 months	Nov 2025-Apr 2026
kmizzi	3 months	Nov 2025-Feb 2026
bbhxwl	3 months	Jan-Apr 2026

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Community Engagement (Issue Comments)

Beyond filing issues/PRs, these people are the actual community — they discuss, review, and help others:

User	Comments	Role
bra1nDump (Kirill Dubovitskiy)	104	Co-founder
ex3ndr (Steve Korshakov)	90	Co-founder
GrocerPublishAgent (PeoplesGrocers)	71	Co-founder (automated agent)
leeroybrun	40	Community champion
happier-bot	20	Bot
Miista (Søren Guldmund)	13	Discussion participant
ahundt (Andrew Hundt, CMU)	13	Academic contributor
MattStarfield	12	Hardware engineer
hyacz	12	Chinese community builder
tiann (weishu)	10	KernelSU creator
rrnewton (Ryan Newton, Meta/Purdue)	10	CS researcher

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⭐ The VIP Wall — Notable Users by Profile

Founders

ex3ndr (Steve Korshakov) — Bay Area — 1,099 followers — 90 comments

• "Chaotic good inventor." Working on AGI, social, fintech, new languages
• Created llama-coder (2,082 stars) — local AI Copilot replacement
• Core contributor to Nicegram (Telegram alternative client, 681+338 stars)
• Created Tact smart contract language for TON blockchain (694 stars)
• Building VALL-E 2 and VoiceBox neural network reproductions
• Also runs ex3ndr-bot submitting automated PRs
• Happy activity: 2 PRs + 9 bot PRs + 90 comments.

bra1nDump (Kirill Dubovitskiy) — Bay Area — Co-founder

• Previously at Robinhood (AI) and Meta
• Happy activity: 104 comments, core maintainer.

GrocerPublishAgent — PeoplesGrocers LLC — Co-founder (automated agent)

• Agentic CI/CD system operated by PeoplesGrocers LLC
• Happy activity: 4 merged PRs + 71 comments. Handles mono repo refactoring, win32 bundling, e2e testing.

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Tier S — Industry Legends

anaisbetts (Ani Betts) — Berlin — 2,428 followers

• Created ReactiveUI (8,469 stars), .NET reactive programming framework
• Created Akavache (2,543 stars) and ModernHttpClient (656 stars)
• Former GitHub engineer, worked on Electron (246 commits) and GitHub Desktop
• Now building MCP tools: mcp-installer (1,519 stars), mcp-youtube (514 stars)
• Happy activity: 1 issue (Nov 2025). Early user.

rom1504 (Romain Beaumont) — Palo Alto — 2,228 followers

• ML Engineer at Google
• Created img2dataset (4,407 stars) — THE tool for building AI training datasets
• Created clip-retrieval (2,749 stars)
• Key figure in LAION ecosystem (Open-Assistant: 37,419 stars)
• Happy activity: 1 issue (Jan 2026).

shayne (Shayne Sweeney) — NYC — 360 followers

• ChatGPT team at OpenAI
• Ex-Tailscale Product
• First Engineer at Instagram
• Created go-wsl2-host (1,679 stars), wsl2-hacks (1,312 stars)
• Happy activity: 4 issue comments. Lurker-engager.

glasser (David Glasser) — Berkeley — 519 followers

• Core engineer at Apollo GraphQL (apollo-server: 13,937 stars)
• 3,978 commits to Meteor (44,781 stars) — one of its most prolific contributors ever
• Happy activity: 1 issue (Jan 2026).

aronchick (David Aronchick) — Seattle — 182 followers

• Co-founder of Kubeflow (15,568 stars) — THE ML toolkit for Kubernetes
• Previously led Kubernetes/ML at Google
• Now CEO of Expanso (Bacalhau, 854 stars)
• Happy activity: 2 contributions (Jan 2026), including a PR.

tiann (weishu) — Hong Kong — 8,218 followers

• Creator of KernelSU (15,979 stars) — kernel-based Android root solution
• Also runs hapi (3,451 stars) — a competing/parallel mobile AI coding client!
• Created Leoric (1,918 stars), eadb (555 stars)
• Happy activity: 5 PRs (3 merged, Dec 2025). Android fixes. Also 10 comments.

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Tier A — Well-Known in Their Domain

danielamitay (Daniel Amitay) — NYC — 401 followers

• OG iOS developer legend
• Created DACircularProgress (2,348 stars), DAKeyboardControl (1,551 stars), iHasApp (1,431 stars)
• 6,500+ cumulative stars across iOS libraries
• Happy activity: 1 merged PR (Jan 2026) — swipe to archive/delete sessions.

rsanheim (Rob Sanheim) — Madison, WI — 250 followers

• Former GitHub engineer
• Former Cognitect (the company behind Clojure/Datomic)
• Now at Doximity. Ruby/Rails community veteran since 2008.
• Happy activity: 1 PR (Feb 2026) — removing credential logging.

rrnewton (Ryan Newton) — Indiana — 287 followers

• Computer Scientist at Meta and Purdue University (and Indiana University)
• Specializes in Containers, Compilers, Deterministic Parallelism
• Created happy-devbox (30 stars) — dev environment for Happy
• Happy activity: 1 PR + 10 comments.

anaclumos (Sunghyun Cho) — 0 followers (deliberately hidden)

• Created bing-chat-for-all-browsers (1,444 stars)
• Created heimdall (130 stars), extracranial (146 stars)
• Deliberately anonymous profile ("not interested in becoming famous")
• Happy activity: 1 issue (Nov 2025). Very early.

denysvitali (Denys Vitali) — Zurich — 520 followers

• Prolific hacker/reverse engineer. 484 repos.
• Created thebestmotherfuckingwebsite (675 stars), nginx-error-pages (425 stars)
• Tesla firmware decryption, Apple FindMy key ops, COVID cert analysis
• Happy activity: 4 contributions spanning Sep 2025-Feb 2026. Very early, very persistent.

krzemienski (Nick Krzemienski) — NYC — 228 followers

• Video Engineer, formerly Engineering Lead at fuboTV
• Created awesome-video (1,845 stars) — definitive streaming video resource
• 1,325 repos. Also building Claude Code iOS tools obsessively.
• Happy activity: 3 PRs (Sep-Oct 2025). VERY early. First external feature contributor.

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Tier B — Impressive Professionals

dzlobin (Danny Zlobinsky) — NYC — 113 followers

• Engineering Manager at Meta/Facebook
• Happy activity: 5 contributions (Feb 2026). PRs: camera dismiss, Ink rendering, tmux detach.

omachala (Ondrej Machala) — London — 11 followers

• Engineering Lead at JPMorgan Chase
• Created ha-treemap-card (57 stars), heroshot (35 stars)
• Happy activity: 6 issues (Feb 2026). Thoughtful UX-focused bug reports.

mfazekas (Miklos Fazekas) — Hungary — 142 followers

• Freelance React Native expert
• Lead maintainer of rnmapbox/maps (2,810 stars)
• Also maintains net-ssh (Ruby SSH library)
• Happy activity: 1 PR (Feb 2026) — PTY proxy stdin corruption fix.

lucharo (Luis Chaves Rodriguez) — London — 35 followers

• Data scientist/bioinformatician at GSK (GlaxoSmithKline)
• MSc Health Data Analytics & Machine Learning
• Happy activity: 7 contributions (Feb 2026). UX bug reports.

brtkwr (Bharat) — Bristol, UK — 52 followers

• Security engineer at Two Inc (B2B payments fintech)
• Happy activity: 7 security issues in ONE DAY (Feb 19). Full security audit: QR auth expiry, wildcard CORS, debug logs, Docker root, RevenueCat bypass.

arthurgervais (Arthur Gervais) — 97 followers

• Blockchain security researcher
• Created Bitcoin-Simulator (196 stars), MAPTA (99 stars)
• Building AI-driven automated security testing (XBOW)
• Happy activity: 1 issue (Jan 2026).

ahundt (Andrew Hundt) — Pittsburgh — 505 followers

• Carnegie Mellon University CIFellow, PhD Johns Hopkins
• Previously at CMU's National Robotics Engineering Center
• Created awesome-robotics (1,365 stars)
• Happy activity: 5 contributions spanning Nov 2025-Mar 2026. 13 comments.

jonocodes (Jono) — San Francisco — 41 followers

• Works at Terradot (climate tech / carbon removal)
• Created savr (113 stars), GtkSourceSchemer, GeditSplitView
• Happy activity: 6 contributions (Mar 2026). Server status, web errors, UX.

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Tier C — Community Champions (Not Famous but Incredibly Valuable)

leeroybrun (Leeroy Brun) — Lausanne, Switzerland — 69 followers

• Full-stack engineer at Batiplus
• Built the entire Happy self-hosted ecosystem: happy-stacks, happy-server-light, happy-cli, slopus.github.io (docs)
• 5 merged PRs + 40 issue comments. THE community champion.
• Also built tools for Codex and OpenCode.

(ex3ndr and GrocerPublishAgent are co-founders — see Founders section above)

cruzanstx — Possibly US Virgin Islands — 9 followers

• The LONGEST-TENURED active user: Nov 2025 to Apr 2026 (5+ months!)
• Built cclimits (15 stars) — check quota for Claude Code, Codex, Gemini CLI
• Also built own hapi fork and happy-cli fork
• 6 issues spanning 5 months. The most persistent power user.

theflysurfer — ??? — 0 followers, 0 repos

• Ghost account. Filed 22 issues (most of any user!) covering i18n, image upload, sessions, pkgroll
• 18 issues in a SINGLE DAY (Feb 24, 2026). Insane thoroughness.
• Complete mystery — no profile, no repos, no followers. Just issues.

nikhilsitaram — ??? — 0 followers

• Brand new account (Dec 2025), but created claude-caliper (68 stars) and claude-memory-system (12 stars)
• 7 contributions focused on MCP/infrastructure
• Possibly experienced dev with a fresh account for AI tooling work.

Scoteezy (Denis Bondarenko) — Russia — 9 followers

• 100% merge rate! All 4 PRs merged.
• Windows fixes, claude-agent-sdk migration, yolo mode, Gemini ACP integration
• The most versatile and reliable external contributor.

hztBUAA (Zhenting Huang) — Beijing — 30 followers

• CS senior at Beihang University (BUAA). 99 public repos.
• Building Obsidian plugins, AI desktop apps, MCP tools, LLM security scanners
• 10 contributions. Technically ambitious for a student.

SaneBow — Hong Kong — 49 followers

• Security + ML researcher
• Created PiDTLN (93 stars, ML noise suppression), redirect-fuzzer (53 stars)
• 2 merged PRs: AskUserQuestion UI, collapsible sidebar.

EricSeastrand — Houston, TX — 6 followers

• Building Claude Code tooling ecosystem: claude-context, claude-usage, claude-vectorsearch
• 9 PRs in 2 days. Mobile web fixes + Prometheus metrics. 1 merged.

kmizzi (Kalvin Mizzi) — Los Angeles — 6 followers

• Fintech developer. Polymarket arbitrage bot (10 stars), automated trading
• One of the EARLIEST external contributors (Nov 2025). 6 contributions over 3 months.

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The Pioneers (Pre-November 2025)

These 12 people were using Happy before it had any real traction:

User	First Activity	What They Did
expectfun (Eugene Trifonov)	Jul 21, 2025	Fixed a typo. Literally the first external contributor.
vzhovnitsky (Vladislav)	Jul 22, 2025	iOS permissions check
dvlkv (Dan Volkov)	Jul 28, 2025	Android barcode scanner fix
turbocrime	Aug 22, 2025	Modal.prompt Android fix
kamal (Kamal Fariz Mahyuddin)	Aug 22, 2025	Submit button + staged file path fixes. Bay Area Ruby veteran.
lava (Benno Evers)	Aug 26, 2025	Voice assistant incoming messages
pyflmcp	Sep 3, 2025	Simplified Chinese language pack
JulianCrespi	Sep 7, 2025	iOS file picker
Lesiuk (Damian Lesiuk)	Sep 13, 2025	GLM coding plan compatibility
denysvitali (Denys Vitali)	Sep 23, 2025	New session wizard. Zurich hacker, 520 followers.
krzemienski (Nick Krzemienski)	Sep 30, 2025	Resource browser, model control, Sonnet 4.5 support. Video industry leader.
GrocerPublishAgent	Sep 2025	Co-founder (automated agent)

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External Contributors with Merged PRs (Code That Shipped)

42 external contributors have had code merged. Top by volume:

Contributor	Merged PRs	Key Contributions
leeroybrun	5	Expo app fixes, TypeScript CI, Enter-to-send, new session UX
Scoteezy	4	Windows, SDK migration, yolo mode, Gemini ACP. 100% merge rate.
GrocerPublishAgent	4	win32 bundling, mono repo, session hiding, markdown copy
tiann	3	Android: first message, press, notifications
LightYear512	2	Windows npm shims, windowsHide
hyacz	2	Markdown layout, CLAUDE.md docs
OrdinarySF	2	Shell wrapper, IME composition
kmizzi	2	Message fetch, encryption retry

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Burst Contributors (The "Speed Runners")

Some people go absolutely ham in a single day:

User	Items	Date	What Happened
theflysurfer	18	Feb 24	Filed 18 detailed issues in one day
davidrimshnick	12	Feb 21	12 PRs, 0 merged. Possibly AI-generated burst.
HirokiKobayashi-R	10	Feb 13	10 contributions. Go/infra engineer.
seibe	9	Feb 21	9 PRs. Japanese Haxe/WebRTC dev in Tokyo.
EricSeastrand	8	Mar 13	8 PRs. Mobile web + Prometheus. Houston dev.
brtkwr	7	Feb 19	7 security issues. Full audit in one sitting.
nikhilsitaram	7	Feb 16	7 contributions. MCP/infra focus.

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Still Active (April 2026)

55 users active in April 2026. Notable returnees from earlier cohorts:

• cruzanstx — Active since Nov 2025 (5+ months!)
• LightYear512 — Active since Jan 2026 (4 months), Windows champion
• Scoteezy — Active since Jan 2026, still shipping merged PRs
• chaehyun2 — Active since Feb 2026, frontend contributions
• bbhxwl — Active since Jan 2026

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Geographic Distribution (Inferred)

East Asia (~35%): China (Beijing, Wuhan, Shanghai, HK), Japan (Tokyo), Korea, Taiwan North America (~30%): SF Bay Area, NYC, Houston, LA, Seattle, Pittsburgh, El Paso Europe (~25%): London, Zurich/Lausanne, Bristol, Hungary, Russia, Czech Republic, Greece Other (~10%): Israel, India, Vietnam, Brazil, USVI

Notable clusters:

• Bay Area: ex3ndr, kamal, jonocodes, rom1504
• NYC: dzlobin, danielamitay, krzemienski, fny
• London: omachala (JPMorgan), lucharo (GSK), brtkwr (Two Inc)
• Beijing: hztBUAA, nullne
• Hong Kong: tiann, SaneBow

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User Archetypes

1. The Power User (cruzanstx, theflysurfer, omachala) — Files many issues over time, deeply knows the product, shapes UX
2. The Code Contributor (leeroybrun, Scoteezy, tiann) — Submits PRs that get merged, ships features
3. The Security Auditor (brtkwr) — Does a comprehensive security sweep in one session
4. The Ecosystem Builder (leeroybrun, chris-yyau, EricSeastrand) — Builds tools, docs, and infrastructure around Happy
5. The Sprint Contributor (davidrimshnick, seibe, EricSeastrand) — Burst of activity in 1-2 days
6. The Silent VIP (shayne, glasser, anaisbetts, rom1504) — Famous people who lurk, comment, or file 1 issue
7. The Student Builder (hztBUAA, chaehyun2) — Early career devs contributing to build their portfolio
8. The Competing Builder (tiann/hapi, cruzanstx/hapi) — People who also build similar products

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Key Takeaways

1. You have genuine industry credibility. Instagram's first engineer, OpenAI, Meta EMs, CMU professors, Apollo/Meteor core engineers, ReactiveUI creators, and Google ML researchers all use Happy. This is not a toy project.

2. Steve Korshakov (ex3ndr) is your #1 community asset. 90 comments, 11 PRs (via bot), plugin architecture work. He's basically volunteering as a co-maintainer. The llama-coder creator (2K stars) clearly believes in Happy.

3. Leeroybrun is your community champion. Built the entire self-hosted ecosystem, 40 comments, 5 merged PRs. If you ever want to recognize a community contributor, it's him.

4. The security audit from brtkwr was a gift. 7 vulnerabilities found in one day. This is the kind of thing companies pay $50K+ for.

5. Retention is low (5.6%) but the retained users are incredibly high-quality. The 28 returning contributors are the product's backbone.

6. Chinese developer community is massive and growing. ~35% of contributors. Beijing (Beihang University), Wuhan, HK. i18n and Windows support are high-priority for this segment.

7. tiann (weishu) is both an ally and a competitor. His hapi project (3.4K stars) does the same thing. His early Android fixes for Happy were likely cross-pollination. Worth watching.

8. The "burst contributor" pattern (12 PRs in 1 day, 18 issues in 1 day) suggests people discover Happy and immediately deep-dive. First impressions matter enormously.

9. Session management is the #1 pain point (158 contributions). Daemon lifecycle, tmux, session state — this is where the product needs the most polish.

10. The product has genuine "vibe coding" PMF. The fact that Claude Code, Codex, Gemini, Kimi, and OpenCode integrations are all being contributed by users suggests Happy is becoming the universal mobile frontend for AI coding agents.