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Guilhem Fanton Person direct

Status: Active Updated: 2026-02-18 Sessions: 1 Facts: 86

Guilhem Fanton

Type: person Last Updated: 2026-02-18 Status: Active Research Sessions: 1

Executive Summary

Guilhem Fanton is a French software engineer specializing in Go, peer-to-peer networking, and blockchain infrastructure. He is currently a core developer at Gno.land/gnolang (since August 2023), where he works on gnodev, gnoweb, standard library packages, and infrastructure. Previously, he was a long-time core developer at Berty Technologies (2018-2023), building peer-to-peer secure messaging with libp2p/IPFS. Before Berty, he worked at PrestaShop (circa 2015-2016). He is a member of multiple GitHub organizations including gnolang, berty, gnoverse, IPFS, and ipfs-shipyard.

Facts

Current Role - Gno.land / gnolang

  • Core developer and member of the gnolang GitHub organization — Source: https://api.github.com/orgs/gnolang/members (confidence: HIGH) (discovered: 2026-02-18)
  • Also a member of the gnoverse GitHub organization — Source: https://api.github.com/orgs/gnoverse/members (confidence: HIGH) (discovered: 2026-02-18)
  • First gnolang PR was "feat: add GNOROOT environment variables" on 2023-08-01 — Source: https://github.com/gnolang/gno/pull/1014 (confidence: HIGH) (discovered: 2026-02-18)
  • Has authored 127 PRs to the gnolang org as of 2026-02-18 — Source: GitHub API search (confidence: HIGH) (discovered: 2026-02-18)
  • PR volume by year: 24 PRs (2023), 53 PRs (2024), 47 PRs (2025), 3 PRs (2026 so far) — Source: GitHub API search (confidence: HIGH) (discovered: 2026-02-18)
  • 897 commits to gnolang org repositories — Source: GitHub API commit search (confidence: HIGH) (discovered: 2026-02-18)
  • Most recent gnolang activity: "wip: benchops rework" PR on 2026-02-16 — Source: https://github.com/gnolang/gno/pull/5152 (confidence: HIGH) (discovered: 2026-02-18)
  • Active on gnolang/infrastructure repo (CSP headers, deployment) — Source: https://github.com/gnolang/infrastructure/pull/33 (confidence: HIGH) (discovered: 2026-02-18)
  • Contributing to gnolang/Obsidian (knowledge base vault backups) — Source: GitHub API commit search (confidence: MEDIUM) (discovered: 2026-02-18)
  • Contributing to gnolang/multisigs — Source: GitHub API commit search (confidence: HIGH) (discovered: 2026-02-18)
  • Contributing to gnolang/gno-by-example — Source: GitHub API PR search (confidence: HIGH) (discovered: 2026-02-18)
  • Contributing to gnolang/supernova (load testing) — Source: GitHub API PR search (confidence: HIGH) (discovered: 2026-02-18)
  • Contributing to gnolang/workshops — Source: GitHub API PR search (confidence: HIGH) (discovered: 2026-02-18)

Key gnolang Work Areas

  • gnodev: Primary maintainer/developer of gnodev tooling (36+ PRs mentioning gnodev) — Source: GitHub API PR search (confidence: HIGH) (discovered: 2026-02-18)
    • Native package loader (PR #4957)
    • Handle addpkg messages (PR #4113)
    • Automatic page reload on save (PR, Dec 2023)
    • Deploy key handling, test fixes, xform2 support
  • gnoweb: Web interface for Gno — Source: GitHub API PR search (confidence: HIGH) (discovered: 2026-02-18)
    • Form execution (PR #4858)
    • Liveness/readiness endpoints (PR #4646)
    • params:changed feature (PR #5002)
  • Standard library: Added path package, net/url package — Source: https://github.com/gnolang/gno/pull/1065, https://github.com/gnolang/gno/pull/1066 (confidence: HIGH) (discovered: 2026-02-18)
  • JSON implementation v4 (PR #4972, open) — Source: https://github.com/gnolang/gno/pull/4972 (confidence: HIGH) (discovered: 2026-02-18)
  • Testing infrastructure: txtar integration test driver, codecov, CI fixes — Source: https://github.com/gnolang/gno/pull/1117 (confidence: HIGH) (discovered: 2026-02-18)
  • Markdown/SVG extension (PR #4840) — Source: https://github.com/gnolang/gno/pull/4840 (confidence: HIGH) (discovered: 2026-02-18)
  • gnopls (Gno Language Server Protocol): 14 PRs to gnoverse/gnopls, also maintains gnopls-archive repo — Source: GitHub API search (confidence: HIGH) (discovered: 2026-02-18)
  • TM2 separation: "remove gnovm and gno.land dependencies from tm2" (Dec 2023) — Source: GitHub API PR search (confidence: HIGH) (discovered: 2026-02-18)
  • E2E multinode determinism testing (PR #4596) — Source: https://github.com/gnolang/gno/pull/4596 (confidence: HIGH) (discovered: 2026-02-18)
  • WAL (Write-Ahead Log) fixes (PR #5121) — Source: https://github.com/gnolang/gno/pull/5121 (confidence: HIGH) (discovered: 2026-02-18)
  • Actively working on Go runtime internals for Gno: forked goloader, tamago (bare metal Go), and the Go compiler itself (Feb 2026) — Source: https://github.com/gfanton/goloader, https://github.com/gfanton/tamago, https://github.com/gfanton/go (confidence: HIGH) (discovered: 2026-02-18)

Previous Role - Berty Technologies (2018-2023)

  • Core developer at Berty Technologies from June 2018 to ~July 2023 — Source: GitHub API commit/PR search (confidence: HIGH) (discovered: 2026-02-18)
  • Member of the berty GitHub organization (along with gfanton-sudo account) — Source: https://api.github.com/orgs/berty/members (confidence: HIGH) (discovered: 2026-02-18)
  • Authored 385 PRs to berty org repositories — Source: GitHub API search (confidence: HIGH) (discovered: 2026-02-18)
  • PR volume by year: 40 (2018), 71 (2019), 90 (2020), 47 (2021), 82 (2022), 55 (2023) — Source: GitHub API search (confidence: HIGH) (discovered: 2026-02-18)
  • 1,719 commits to berty org repositories — Source: GitHub API commit search (confidence: HIGH) (discovered: 2026-02-18)
  • First berty commit: "feat(ressources): Add libp2p ressources" on 2018-06-16 to berty/staff — Source: GitHub API commit search (confidence: HIGH) (discovered: 2026-02-18)
  • Earliest work was on the p2p network driver for berty/berty — Source: GitHub API commit search (confidence: HIGH) (discovered: 2026-02-18)
  • Last berty activity: July 2023 (weshnet-expo android builds) — Source: GitHub API commit search (confidence: HIGH) (discovered: 2026-02-18)
  • Key berty repos contributed to: berty/berty, berty/weshnet, berty/weshnet-expo, berty/go-orbit-db, berty/go-ipfs-log, berty/go-ipfs-repo-encrypted, berty/go-libp2p-pubsub, berty/go-libp2p-rendezvous, berty/emitter-go, berty/berty-bench — Source: GitHub API PR search (confidence: HIGH) (discovered: 2026-02-18)
  • 259 PRs to the main berty/berty repository alone — Source: GitHub API search (confidence: HIGH) (discovered: 2026-02-18)

Earlier Career - PrestaShop (~2014-2016)

  • Used email guilhem.fanton@prestashop.com in commits from April 2015 through early 2016 — Source: GitHub API commit search (confidence: HIGH) (discovered: 2026-02-18)
  • First GitHub activity: commit to N0ich/attlestar on 2014-04-13 using guilhem.fanton@gmail.com — Source: GitHub API commit search (confidence: HIGH) (discovered: 2026-02-18)
  • Contributed PRs to PrestaShop/PrestaShop (UIKit, shopping cart page) — Source: GitHub API PR search (confidence: HIGH) (discovered: 2026-02-18)
  • Contributed PRs to PrestaShopCorp/tntcarrier module — Source: GitHub API PR search (confidence: HIGH) (discovered: 2026-02-18)
  • First-ever GitHub PR: "PayPal USA: Bug fix - Error 503 fixed" to PrestaShop-modules on 2014-09-05 — Source: GitHub API PR search (confidence: HIGH) (discovered: 2026-02-18)

Wulo / United Drivers (~2016-2017)

  • Collaborated with Manfred Touron (moul) on wulo-mobile-v1 — Source: GitHub API PR search (confidence: HIGH) (discovered: 2026-02-18)
  • PRs to moul/wulo-mobile-v1 from Oct-Dec 2016 (React Native mobile app, gomobile, Redux) — Source: GitHub API PR search (confidence: HIGH) (discovered: 2026-02-18)
  • United Drivers org description: "La plateforme alternative et associative de transport" (wulo.fr) — Source: https://api.github.com/orgs/united-drivers (confidence: HIGH) (discovered: 2026-02-18)
  • Also contributed to united-drivers/react-native-background-location (iOS support) — Source: GitHub API PR search (confidence: HIGH) (discovered: 2026-02-18)

Technical Profile

  • Primary language: Go (9 original repos, dominant in contributions) — Source: GitHub API (confidence: HIGH) (discovered: 2026-02-18)
  • Other languages: Emacs Lisp (3 repos), TypeScript, Java, HTML — Source: GitHub API (confidence: HIGH) (discovered: 2026-02-18)
  • Editor: Emacs/Spacemacs user (dotspacemacs repo, gno-mode.el gist, nixpkgs config in Emacs Lisp) — Source: https://github.com/gfanton/dotspacemacs, https://gist.github.com/gfanton/6e233656dfeabd7a46f21f7507b6b311 (confidence: HIGH) (discovered: 2026-02-18)
  • Infrastructure: Nix user (nixpkgs config repo) — Source: https://github.com/gfanton/nixpkgs (confidence: HIGH) (discovered: 2026-02-18)
  • macOS user: Forked yabai (tiling window manager), Raycast extensions — Source: GitHub forks (confidence: HIGH) (discovered: 2026-02-18)
  • Networking expertise: grpc-quic (44 stars, gRPC over QUIC), libp2p contributions — Source: https://github.com/gfanton/grpc-quic (confidence: HIGH) (discovered: 2026-02-18)
  • libp2p contributor: 5 PRs including QUIC DisableReuseport option, Android netlink support, rendezvous protocol — Source: GitHub API PR search (confidence: HIGH) (discovered: 2026-02-18)
  • IPFS ecosystem: Member of ipfs and ipfs-shipyard orgs, PRs to ipfs/kubo and go-ipfs-api — Source: GitHub API (confidence: HIGH) (discovered: 2026-02-18)
  • Hardware/embedded interests: Forked tamago (bare metal Go), sbc-rockchip (RockChip overlays) — Source: GitHub forks (confidence: HIGH) (discovered: 2026-02-18)
  • AI tooling interest: Forked everything-claude-code (Jan 2026) — Source: https://github.com/gfanton/everything-claude-code (confidence: HIGH) (discovered: 2026-02-18)
  • Contributed to moul/protodefs: GRPC output tooling (2016) — Source: GitHub API PR search (confidence: HIGH) (discovered: 2026-02-18)
  • Contributed to moul/awesome-ssh: Added ssh-audit (2016) — Source: GitHub API PR search (confidence: HIGH) (discovered: 2026-02-18)
  • Contributed to moul/nixpkgs: Added gnolint and testscripts mode (2023) — Source: https://github.com/moul/nixpkgs/pull/94 (confidence: HIGH) (discovered: 2026-02-18)

Notable Personal Projects

  • grpc-quic (44 stars) - gRPC over QUIC protocol — Source: https://github.com/gfanton/grpc-quic (confidence: HIGH) (discovered: 2026-02-18)
  • gnopls-archive (2 stars) - Gno Language Server Protocol (archived) — Source: https://github.com/gfanton/gnopls-archive (confidence: HIGH) (discovered: 2026-02-18)
  • tmux-yule-log (2 stars) - Tmux yule log screensaver in Go — Source: https://github.com/gfanton/tmux-yule-log (confidence: HIGH) (discovered: 2026-02-18)
  • loon (2 stars) - Go project — Source: https://github.com/gfanton/loon (confidence: HIGH) (discovered: 2026-02-18)
  • gocovmerge-action - GitHub Action for merging Go coverage profiles — Source: https://github.com/gfanton/gocovmerge-action (confidence: HIGH) (discovered: 2026-02-18)
  • rules_gomobile - gomobile bind rules for Bazel — Source: https://github.com/gfanton/rules_gomobile (confidence: HIGH) (discovered: 2026-02-18)
  • libp2p-reuseport-test - Testing reuseport on cellular — Source: https://github.com/gfanton/libp2p-reuseport-test (confidence: HIGH) (discovered: 2026-02-18)
  • grpcutil - gRPC lazy connection — Source: https://github.com/gfanton/grpcutil (confidence: HIGH) (discovered: 2026-02-18)
  • whensday - TypeScript project (recently active, Feb 2026) — Source: https://github.com/gfanton/whensday (confidence: HIGH) (discovered: 2026-02-18)

Online Presence

  • GitHub: github.com/gfanton (97 public repos, 5 gists, 125 followers, 78 following) — Source: https://github.com/gfanton (confidence: HIGH) (discovered: 2026-02-18)
  • GitHub account created: 2014-09-05 — Source: GitHub API (confidence: HIGH) (discovered: 2026-02-18)
  • Keybase: keybase.io/gfanton (PGP key: 1323 3DBE 4654 FD3A D3C6 EA66 01D0 E3BE DC7C 1D46) — Source: https://gist.github.com/gfanton/846730adb0402526b287deebd1e34443 (confidence: HIGH) (discovered: 2026-02-18)
  • Email (personal): guilhem.fanton@gmail.com — Source: GitHub API commit metadata (confidence: HIGH) (discovered: 2026-02-18)
  • Email (former work): guilhem.fanton@prestashop.com — Source: GitHub API commit metadata (confidence: HIGH) (discovered: 2026-02-18)
  • GitHub noreply: 8671905+gfanton@users.noreply.github.com (current) — Source: GitHub API commit metadata (confidence: HIGH) (discovered: 2026-02-18)
  • Gist: gno-mode.el - Emacs mode for Gno development (Aug 2023) — Source: https://gist.github.com/gfanton/6e233656dfeabd7a46f21f7507b6b311 (confidence: HIGH) (discovered: 2026-02-18)
  • Gist: lazy query load tag format (Feb 2025) — Source: https://gist.github.com/gfanton/5721b750532eaae93c9f58a26c595630 (confidence: HIGH) (discovered: 2026-02-18)

Connections

  • Manfred Touron (moul): Mutual GitHub follow. Collaborated since at least 2016 (wulo-mobile, protodefs, awesome-ssh). Both worked at Berty Technologies. Both now at gnolang. — Source: GitHub API (confidence: HIGH) (discovered: 2026-02-18)
  • Antoine Eddi (aeddi): Fellow gnolang member, previously at Berty and AWS. Both in berty and gnolang/gnoverse orgs. — Source: https://github.com/aeddi (confidence: HIGH) (discovered: 2026-02-18)
  • Guillaume Louvigny (glouvigny): Mutual follow. Likely former Berty colleague. — Source: GitHub API (confidence: MEDIUM) (discovered: 2026-02-18)
  • Morgan (thehowl): Mutual follow. gnolang team member. — Source: https://github.com/thehowl (confidence: HIGH) (discovered: 2026-02-18)
  • Thomas Bruyelle (tbruyelle): Mutual follow. Works at All in Bits (Cosmos ecosystem). — Source: https://github.com/tbruyelle (confidence: HIGH) (discovered: 2026-02-18)
  • Steeve Morin (steeve): Follows. Co-founder of ZML. — Source: https://github.com/steeve (confidence: MEDIUM) (discovered: 2026-02-18)
  • Jae Kwon (jaekwon): Follows. Cosmos/Tendermint founder, Gno.land creator. — Source: GitHub API following list (confidence: HIGH) (discovered: 2026-02-18)
  • Vincent (N0ich): Earliest known collaborator (2014, attlestar project). Based in France. — Source: GitHub API (confidence: MEDIUM) (discovered: 2026-02-18)
  • Alexis Colin (alexiscolin): Active collaboration on gno fork (multiple PRs in 2025-2026, gnoweb frontend work). gnolang/gnoverse member. — Source: GitHub API PR search (confidence: HIGH) (discovered: 2026-02-18)
  • John Oppenheimer (johnoppenheimer): Mutual follow. Collaborated on raycast-lunchmoney extension. — Source: GitHub API PR search (confidence: HIGH) (discovered: 2026-02-18)
  • Rob Pike (robpike): Follows (Go language creator). — Source: GitHub API following list (confidence: HIGH) (discovered: 2026-02-18)
  • Russ Cox (rsc): Follows (Go language lead). — Source: GitHub API following list (confidence: HIGH) (discovered: 2026-02-18)
  • Jason Zacek (zx2c4): Follows (WireGuard creator). — Source: GitHub API following list (confidence: HIGH) (discovered: 2026-02-18)

Career Timeline

| Period | Role | Organization | |--------|------|-------------| | ~2014-2016 | Developer | PrestaShop | | ~2016-2017 | Developer (mobile) | United Drivers / Wulo (with Manfred Touron) | | 2018-06 to 2023-07 | Core Developer (P2P networking) | Berty Technologies | | 2023-08 to present | Core Developer (gnodev, gnoweb, stdlib) | Gno.land / gnolang |

GitHub Organization Memberships

  • gnolang - Gno blockchain (active, core team) — Source: GitHub API (confidence: HIGH) (discovered: 2026-02-18)
  • gnoverse - Gno ecosystem tooling — Source: GitHub API (confidence: HIGH) (discovered: 2026-02-18)
  • berty - Berty Technologies (still member) — Source: GitHub API (confidence: HIGH) (discovered: 2026-02-18)
  • ipfs - InterPlanetary File System — Source: GitHub API (confidence: HIGH) (discovered: 2026-02-18)
  • ipfs-shipyard - IPFS experimental projects — Source: GitHub API (confidence: HIGH) (discovered: 2026-02-18)
  • World42 - Unknown org — Source: GitHub API (confidence: HIGH) (discovered: 2026-02-18)

Related Entities

  • Manfred Touron - Long-time collaborator, both at Berty and gnolang (discovered: 2026-02-18)
  • Jae Kwon - Gno.land founder, follows on GitHub (discovered: 2026-02-18)
  • Morgan Bazalgette - gnolang colleague, mutual follow (discovered: 2026-02-18)
  • Antoine Breuil (zôÖma) - Berty community, Paris P2P ecosystem (discovered: 2026-02-18)
  • Berty Technologies - Former employer, core developer 2018-2023 (discovered: 2026-02-18)
  • Gno.land / gnolang - Current employer, core developer since Aug 2023 (discovered: 2026-02-18)
  • PrestaShop - Former employer ~2014-2016 (discovered: 2026-02-18)
  • Wulo / United Drivers - Former project with Manfred Touron ~2016-2017 (discovered: 2026-02-18)
  • All in Bits / Cosmos - Related ecosystem (via tbruyelle, gno-realms) (discovered: 2026-02-18)
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