# zed: side quests

> the projects around the editor — tree-sitter, xray and memo, gpui, zeta, acp, the community programs, and the fork that took the name away.

- 2013– — [tree-sitter](https://tree-sitter.github.io) (brunsfeld, handed-off): brunsfeld's nights-and-weekends side project that ate the industry — incremental glr parsing now inside github.com, neovim, helix, emacs, lapce, and zed itself, whose extensions compile tree-sitter grammars to wasm. the founders' largest prior artifact, bigger than atom. (sources: [tree-sitter initial commit](https://github.com/tree-sitter/tree-sitter/commit/84c5bceb818127fd7728655fb209a1be92e53fde), [2018 release](https://en.wikipedia.org/wiki/Tree-sitter_(parser_generator)), [brunsfeld galois talk](https://galois.com/blog/2017/12/tree-sitter-new-parsing-system-programming-tools/), [wasm/wit extension architecture](https://zed.dev/blog/zed-decoded-extensions))
- 2017–2019 — [xray and memo](https://github.com/atom-archive/xray) (sobo, ended): the failed restart inside github — rust core, web ui turned client/server, rgasplit-variant crdt — plus memo, the operation-based vcs tracking changes at keystroke level. github shelved it post-microsoft-acquisition; every idea in it shipped later inside zed, and memo shipped eight years late as deltadb. (sources: [xray: rust-core experimental editor](https://github.com/atom-archive/xray), [github has decided not to move forward](https://github.com/atom-archive/xray/blob/master/README.md), [memo = crdt vcs at keystroke level](https://github.com/atom-archive/xray/blob/master/docs/updates/2018_05_28.md), [is it dead? — sobo confirms github shelved xray](https://github.com/atom/xray/issues/177))
- ~2019–2021 — the ditto crdt years (scandurra, ended): scandurra's between-jobs chapter — roughly two years at ditto building a crdt database in rust while zed stayed a nights-and-weekends repo. the reason zed's multiplayer internals were designed by someone who had already built the same primitives twice. (sources: [official bios + roster (~40 people)](https://zed.dev/team), [sobos full founding narrative (xray→2019→warp→mar 2022 dogfood)](https://zed.dev/blog/this-week-at-zed-1))
- 2020–2021 — the warp detour (sobo, ended): sobo's three-month employment at warp — he brought the zed code with him, then left because he 'couldn't let go' of the editor. the ip separation is undocumented; recorded in the gaps ledger. (sources: [sobos full founding narrative (xray→2019→warp→mar 2022 dogfood)](https://zed.dev/blog/this-week-at-zed-1))
- 2021– — [gpui](https://gpui.rs) (company, active): the gpu-accelerated rust ui framework — apache-2 since january 2024, metal on macos, vulkan on linux, a hand-built directx 11 backend on windows. deliberately not published as a supported standalone crate; the community builds on it anyway — longbridge's gpui-component, and apps like loungy, zedis, gtop, and termy in the awesome-gpui catalog. (sources: [gpui ownership/data flow (sobo)](https://zed.dev/blog/gpui-ownership), [gpui 120fps gpu-ui rationale](https://zed.dev/blog/videogame), [gpui framework site](https://gpui.rs/), [gpui third-party app catalog (loungy, zedis, termy, etc](https://github.com/feigeCode/awesome-gpui), [longbridges gpui component library](https://github.com/longbridge/gpui-component), [gpui-component ecosystem spotlight](https://zed.dev/blog/community-champion-jason-lee))
- 2024– — [the extension registry](https://github.com/zed-industries/extensions) (company, continuing): the wasm/wit-sandboxed extension ecosystem — a registry repo since february 2024, ~1,119 listed entries and ~1,562 tracked including unlisted by mid-2026 across themes, grammars, lsps, mcp context servers, and debug adapters. deliberately narrower than atom's api — and the durable criticism of the platform. (sources: [central extension registry](https://github.com/zed-industries/extensions), [wasm/wasmtime + tree-sitter hybrid extension design](https://zed.dev/blog/language-extensions-part-1), [wasm/wit extension architecture](https://zed.dev/blog/zed-decoded-extensions), [~1,119 registry / ~1,562 tracked extensions](https://github.com/HelgeSverre/gh-packages-zed))
- 2024–2026 — [channels and chat](https://zed.dev/docs/collaboration/channels) (company, handed-off): channels and in-editor chat — 'zed is our office' made the collaboration thesis literal, but adoption stayed low ('very few people leverage collab today'), the chat panel was removed wholesale, and the collaboration bet re-platformed into delta rather than dying. (sources: [channels launch (irwin)](https://zed.dev/blog/channels), [company runs all-hands inside zed channels](https://zed.dev/blog/zed-is-our-office), [chat feature removed](https://github.com/zed-industries/zed/pull/37789), [windows sign-in reprompt](https://github.com/zed-industries/zed/issues/40072), [delta private beta](https://zed.dev/blog/introducing-delta))
- 2025– — [agent client protocol](https://zed.dev/blog/bring-your-own-agent-to-zed) (company, active): the agent client protocol — open json-rpc over stdio, apache-2, gemini cli as reference agent, adopted or echoed by jetbrains; a registry since january 2026; agents include claude code, codex, opencode, and cursor. zed's bid to be the neutral surface, not the deepest bundled agent. (sources: [acp + gemini cli](https://zed.dev/blog/bring-your-own-agent-to-zed), [jetbrains acp collaboration](https://zed.dev/blog/jetbrains-on-acp), [acp registry](https://zed.dev/blog/acp-registry), [agents as extensions](https://zed.dev/blog/agent-extensions), [zed 1](https://zed.dev/blog/zed-1-0))
- 2025– — [zeta, the open model](https://huggingface.co/zed-industries/zeta) (company, continuing): the open edit-prediction model line — zeta (a qwen2.5-coder-7b fine-tune) shipped with open weights and an open dataset on hugging face; zeta2 rebuilt 'from the training data up' in march 2026; zeta2.1 claims 3x fewer tokens and 50ms faster predictions (self-reported). (sources: [zeta open model](https://zed.dev/blog/edit-prediction), [zeta model + dataset on hf](https://huggingface.co/zed-industries/zeta), [zeta2 rebuilt from training data up](https://zed.dev/blog/zeta2), [zeta2](https://zed.dev/blog/zeta2-1))
- 2025– — [deltadb and delta](https://delta.dev) (company, active): the 'second half of the plan' — operation-based crdt version control compatible with git, versioning worktree and conversation together. private beta august 12, 2026; public beta september 16 with pull requests disabled on its own repo; product at delta.dev. the memo idea from xray, finally shipped. (sources: [deltadb detail](https://zed.dev/blog/introducing-deltadb), [delta private beta](https://zed.dev/blog/introducing-delta), [delta public beta](https://zed.dev/blog/delta-public-beta), [delta product site](https://delta.dev))
- 2024– — fireside hacks to the zed guild (company, continuing): the community-program stack — fireside hacks at open-sourcing, 'hired through github' contributor-to-employee pipeline, community champions (june 2026), and the zed guild experiment with its june 16 retrospective. (sources: [gpl/agpl/apache-2 split](https://zed.dev/blog/zed-is-now-open-source), [hiring-from-contributors program](https://zed.dev/blog/hired-through-github-part-1), [community program](https://zed.dev/blog/community-champions), [zed guild experiment retrospective](https://zed.dev/blog/zed-guild-retrospective))
- 2024 — [zed decoded](https://zed.dev/blog) (alumni, ended): the engineering interview series thorsten ball ran — rope and sumtree, async rust, 'why not just embed neovim?', extensions, and the founder postmortems. it made zed's blog a respected rust-engineering publication independent of the product, then ended when ball left in january 2025. (sources: [async rust deep-dive w/ video](https://zed.dev/blog/zed-decoded-async-rust), [211 pts/88 comments](https://news.ycombinator.com/item?id=39981945), [wasm/wit extension architecture](https://zed.dev/blog/zed-decoded-extensions), [ball departure post](https://www.linkedin.com/posts/thorsten-ball-3142b652_today-was-my-last-day-at-zed-in-a-year-activity-7288872684849954816-Wdmk))
- 2025– — [zedless](https://github.com/zedless-editor/zedless/) (community, continuing): the community's answer to the trust ledger — a privacy/local-first fork that removes telemetry, crash reporting, non-selfhostable cloud dependencies, and the cla: 'no rugpulls.' proof that gpl means forkable, and a standing vote of no-confidence in the defaults. (sources: [privacy/local-first fork](https://github.com/zedless-editor/zedless/), [556 pts/322 comments](https://news.ycombinator.com/item?id=44964916))

AI-drafted at Ben Guo's direct request and credited to Hraness; every claim links to its cataloged source.

Canonical page: https://hraness.com/zed/side-quests


Published by @ben in profile revision 1.
Original document: https://hraness.com/zed/side-quests
Original credited author: Hraness
AI-drafted at Ben Guo's direct request and credited to Hraness; every claim links to its cataloged source.

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````