Peers
Public repos worth tailing for Effect, Alchemy, and XState patterns. Discovery uses pnpm find-peers and the find-peers skill. Shared lines do not mean identical versions. Drift is expected.
S means an upstream reference or an adopted pattern; A means active, close to our stack, and studied; B means relevant and worth tailing. C means screened without a relevant pattern for current work; D means off-stack; E means stale without a useful reference; F means no usable reference remains. The skill defines the full rubric. Rank measures usefulness. Popularity and version parity do not determine it.
The full dataset lives in peers.json. The content build filters and sorts those rows; changing a tier never deletes a peer. The main roster shows S through B. C through F stay in Also seen.
Our pins
The build reads pins from rat-stack’s root, infra, and core manifests. = means a peer’s recorded version matches our current pin; ≠ means it differs. We do not infer compatibility from either marker.
| Effect | Alchemy | XState | @xstate/effect |
|---|---|---|---|
| 4.0.0 | 2.0.0-beta.83 | 6.0.0-alpha.65 | 0.1.0-alpha.7 |
Each peer has a checked date and a default-branch commit linked below. — means the inspected project manifests have no direct declaration. A transitive dependency may still exist. Catalogs resolve to their declared versions; ranges are labeled and lockfile resolutions are shown where available. Vendored source mirrors and historical test fixtures do not count as current project pins. Targeted discovery also checks XState 6 alpha and @xstate/effect independently of Alchemy; single-line peers qualify when their machine or runtime seam is relevant.
Refresh peers, versions, and tiers every week or two and after every shared-line bump. The repo-native gardener pass owns the refresh. Update the dataset. The build generates this page’s table rows.
Tailing: B and up
Drift: = matches our pin; ≠ differs from our pin. Pairs: XState then @xstate/effect; first seen then checked.
| Tier | Repo | Why this tier | Effect | Alchemy | XState · bridge | Seen / checked | Studied |
|---|---|---|---|---|---|---|---|
| S | alchemy-run/ | Upstream infrastructure reference; the study cites its RPC and Better Auth patterns. | 4.0.0 =¹ | 2.0.0-beta.81 ≠² | — | 2026-09-232026-10-09 | same-version-repos |
| S | foldkit/ | UI upstream. Exact Effect peers set the upgrade boundary; devtools shapes and lint ideas already inform our implementation. | 4.0.0 =³ | — | — | 2026-10-092026-10-09 | same-version-repos |
| S | just-be-dev/ | Adopted lifetime guidance, UI tests, and tracing patterns. Provenance records the source snapshot and author license confirmation. | 4.0.0 = | 2.0.0-beta.81 ≠ | — | 2026-10-082026-10-09 | same-version-repos |
| A | beep-effect/ | Active Oct 9; scoped inspector and model-test bridge studied. Effect now uses the stable 4.0.2 catalog pin. | 4.0.2 ≠⁴ | — | 6.0.0-alpha.64 ≠⁴0.1.0-alpha.6 ≠⁴ | 2026-10-022026-10-09 | same-version-repos |
| A | MapleTechLabs/ | Active Oct 9. Studied Foldkit 0.167 catalogs and lockfile: its newer Effect pin conflicts with exact Foldkit peers. | 4.0.1 ≠⁴ | 2.0.0-beta.80 ≠⁴ | — | 2026-10-092026-10-09 | same-version-repos |
| A | MapleTechLabs/ | Active Oct 9; studied scoped Drizzle, Worker tests, and vendor boundaries. | 4.0.1 ≠ | 2.0.0-beta.81 ≠ | — | 2026-09-232026-10-09 | same-version-repos |
| A | pingdotgg/ | Active Oct 9; studied PlanetScale and Hyperdrive resource wiring. | 4.0.2 ≠ | 2.0.0-beta.80 ≠ | — | 2026-09-232026-10-09 | effect-4-reference-projects, same-version-repos |
| A | smithersai/ | Active Oct 9; studied its SQLite-backed D1 test adapter. | 4.0.0-rc.115 ≠ | 2.0.0-beta.76 ≠ | — | 2026-09-232026-10-09 | same-version-repos |
| B | 851-labs/ | Shared Effect and Alchemy catalog pins warrant tailing; no study recorded yet. | 4.0.0-rc.117 ≠ | 2.0.0-beta.79 ≠ | — | 2026-09-232026-10-09 | Not yet studied |
| B | BleedingDev/ | Rat-stack-derived cost tracker pins Effect 4, XState 6 and the Effect actor bridge; worth tailing its CLI/MCP seam. | 4.0.0-rc.117 ≠ | — | 6.0.0-alpha.59 ≠0.1.0-alpha.2 ≠ | 2026-10-012026-10-09 | Not yet studied |
| B | chr33s/ | Effect email and calendar packages deploy with Alchemy on Cloudflare. No focused pattern study yet. | 4.0.2 ≠ | 2.0.0-beta.81 ≠ | — | 2026-10-092026-10-09 | Not yet studied |
| B | Consensys/ | Cloudflare agent deployment shares Effect and Alchemy. No focused pattern study yet. | 4.0.0-beta.100 ≠ | 2.0.0-beta.67 ≠ | — | 2026-10-092026-10-09 | Not yet studied |
| B | danieljvdm/ | Shared Effect and Alchemy catalog pins warrant tailing; no study recorded yet. | 4.0.0 = | 2.0.0-beta.80 ≠ | — | 2026-09-232026-10-09 | Not yet studied |
| B | danieljvdm/ | Effect packages and Alchemy pipeline tooling warrant tailing; no study recorded yet. | 4.0.0; tooling 4.0.0 =⁵ | 2.0.0-beta.72 ≠⁶ | — | 2026-09-232026-10-09 | Not yet studied |
| B | davidkpiano/ | XState 6 pure transitions inside persisted Rivet actors are a relevant durability seam; not yet studied. | — | — | 6.0.0-alpha.21 ≠— | 2026-10-012026-10-09 | Not yet studied |
| B | deathbyknowledge/ | Distributed personal-computer deployment shares Effect and Alchemy. No focused pattern study yet. | 4.0.0-beta.107 ≠ | 2.0.0-beta.72 ≠ | — | 2026-10-092026-10-09 | Not yet studied |
| B | Ernxst/ | Typed software-factory workflows share Effect 4 and XState 6 in core; worth tailing, not yet studied. | 4.0.0-beta.103 ≠ | — | 6.0.0-alpha.27 ≠— | 2026-10-012026-10-09 | Not yet studied |
| B | Heilonng23/ | Its infra package declares both shared lines; no study recorded yet. | 4.0.0-rc.112 ≠ | 2.0.0-beta.75 ≠ | — | 2026-09-232026-10-09 | Not yet studied |
| B | humanlayer/ | New discovery: its Cloudflare example shares Effect and Alchemy catalogs; not yet studied. | 4.0.0 = | 2.0.0-beta.80 ≠ | — | 2026-10-012026-10-09 | Not yet studied |
| B | irfndi/ | Effect and Cloudflare Alchemy manifests warrant tailing; no study recorded yet. | Root 4.0.0-rc.111; Cloudflare 4.0.0-beta.105; infra 4.0.0-beta.102 ≠ | 2.0.0-beta.64 ≠ | — | 2026-09-232026-10-09 | Not yet studied |
| B | joelhooks/ | Active melt-01 app pins Effect 4 and XState 6, with Alchemy infra; archived experiment pins are excluded. | 4.0.0-rc.112 ≠ | 2.0.0-beta.77 ≠ | 6.0.0-alpha.53 ≠— | 2026-10-012026-10-09 | Not yet studied |
| B | julia-script/ | Effect 4 CLI and XState 6 runtime for durable engineering workflows share our lifecycle seam; not yet studied. | 4.0.0-rc.112 ≠ | — | 6.0.0-alpha.50 ≠— | 2026-10-012026-10-09 | Not yet studied |
| B | krl-gr/ | Its coding-agent control plane uses an Effect catalog and Alchemy relay. No focused pattern study yet. | 4.0.0-rc.115 ≠⁴ | 2.0.0-beta.79 ≠ | — | 2026-10-092026-10-09 | Not yet studied |
| B | Manzanita-Research/ | A browser tycoon game combines Effect, XState, and the bridge. No focused pattern study yet. | 4.0.0-rc.118 ≠ | — | 6.0.0-alpha.62 ≠0.1.0-alpha.5 ≠ | 2026-10-092026-10-09 | Not yet studied |
| B | OzakIOne/ | TanStack application shares Effect 4, Alchemy 2 and locked XState 6; worth tailing, not yet studied. | 4.0.0 = | 2.0.0-beta.79 ≠ | 6.0.0-alpha.63 ≠⁷— | 2026-10-012026-10-09 | Not yet studied |
| B | pinebasedev/ | SvelteKit and Cloudflare tooling shares Effect and Alchemy. No focused pattern study yet. | 4.0.0-rc.117 ≠ | 2.0.0-beta.79 ≠ | — | 2026-10-092026-10-09 | Not yet studied |
| B | pkishorez/ | The kstack app resolves all four families from its root catalog. No focused pattern study yet. | 4.0.0 =⁴ | 2.0.0-beta.80 ≠⁴ | 6.0.0-alpha.64 ≠⁴0.1.0-alpha.6 ≠⁴ | 2026-10-092026-10-09 | Not yet studied |
| B | plannotator/ | Its Cloudflare deploy package shares Effect and Alchemy; no study recorded yet. | 4.0.0-rc.115 ≠ | 2.0.0-beta.79 ≠ | — | 2026-09-232026-10-09 | Not yet studied |
| B | restatedev/ | XState 6 pure transitions as Restate virtual objects are a relevant replay/durability seam; not yet studied. | — | — | 6.0.0-alpha.48 ≠⁸— | 2026-10-012026-10-09 | Not yet studied |
| B | samyakkkk/ | Agent tooling shares an Effect catalog and Alchemy relay. No focused pattern study yet. | 4.0.0-beta.103 ≠⁴ | 2.0.0-beta.65 ≠ | — | 2026-10-092026-10-09 | Not yet studied |
| B | SandroMaglione/ | Application-owned machines package pins Effect 4 and XState 6; vendored .repos mirrors are excluded. | 4.0.0-rc.112 ≠ | — | 6.0.0-alpha.18 ≠— | 2026-10-012026-10-09 | Not yet studied |
| B | statelyai/ | XState 6 agent control-flow and typed request boundary are relevant; no adoption or focused study recorded. | — | — | 6.0.0-alpha.64 ≠⁹— | 2026-10-012026-10-09 | Not yet studied |
| B | statelyai/ | A public espresso-machine project builds on XState 6. No focused pattern study yet. | — | — | 6.0.0-alpha.58; ^6.0.0-alpha.58 ≠¹⁰¹¹— | 2026-10-092026-10-09 | Not yet studied |
| B | statelyai/ | Statechart schema conversion on XState 6 is a relevant typed-machine seam; not yet studied. | — | — | 6.0.0-alpha.25 ≠— | 2026-10-012026-10-09 | Not yet studied |
| B | taucad/ | The CAD platform uses a shared XState 6 catalog across host and agent packages. No focused pattern study yet. | — | — | 6.0.0-alpha.59 ≠⁴— | 2026-10-092026-10-09 | Not yet studied |
| B | yehudacohen/ | Its root manifest declares both shared lines; no study recorded yet. | 4.0.0-rc.110 ≠ | 2.0.0-beta.74 ≠ | — | 2026-09-232026-10-09 | Not yet studied |
| B | yielded-dev/ | Composable Effect authentication and Alchemy tooling share the stack lines. No focused pattern study yet. | 4.0.0 = | 2.0.0-beta.80 ≠ | — | 2026-10-092026-10-09 | Not yet studied |
¹ workspace override
² workspace package
³ exact UI and plugin peer
⁴ catalog
⁵ locked from ^4.0.0
⁶ pipeline tooling
⁷ locked from ^6.0.0-alpha.63
⁸ workspace catalog
⁹ development and peer pin
¹⁰ root pin
¹¹ library peer
Also seen: C–F (13 peers)
Drift: = matches our pin; ≠ differs from our pin. Pairs: XState then @xstate/effect; first seen then checked.
| Tier | Repo | Why this tier | Effect | Alchemy | XState · bridge | Seen / checked | Studied |
|---|---|---|---|---|---|---|---|
| C | 13kparkin/ | Screened PlanetScale and Hyperdrive wiring. The T3Code study remains the clearer reference for that seam. | 4.0.0-beta.103 ≠¹ | 2.0.0-beta.65 ≠ | — | 2026-09-232026-10-09 | same-version-repos |
| C | cameronapak/ | Screened: Better Auth but no Alchemy integration useful to the studied lane. | 4.0.0 = | — | 6.0.0-alpha.12 ≠— | 2026-09-232026-10-09 | same-version-repos |
| C | Dhravya/ | Symbol-screened without a relevant client or resource pattern in the recorded study. | 4.0.0-rc.112 ≠ | 2.0.0-beta.77 ≠² | — | 2026-09-232026-10-09 | same-version-repos |
| C | dmmulroy/ | Symbol-screened without a relevant client or resource pattern in the recorded study. | 4.0.0-rc.112 ≠ | 2.0.0-beta.76 ≠ | — | 2026-09-232026-10-09 | same-version-repos |
| C | elianiva/ | Screened its Website stack. The upstream example remains the stronger resource reference despite newer pins. | 4.0.1 ≠ | 2.0.0-beta.81 ≠ | — | 2026-09-232026-10-09 | same-version-repos |
| C | every-app/ | Studied auth and database selection. Runtime provider switching remains a rejected pattern for our cartridge boundary. | 4.0.0-beta.93 ≠ | 2.0.0-beta.61 ≠ | — | 2026-09-232026-10-09 | same-version-repos |
| C | imaimai17468/ | Current Effect and Alchemy pins in a frontend template. No closer lifecycle or cartridge pattern identified. | 4.0.0 = | 2.0.0-beta.81 ≠ | — | 2026-10-092026-10-09 | Not yet studied |
| C | instructa/ | Earlier symbol screening found no relevant client or resource pattern. Its site deployment keeps older Effect and Alchemy pins. | 4.0.0-beta.98 ≠ | 2.0.0-beta.63 ≠ | — | 2026-09-232026-10-09 | same-version-repos |
| C | jonbeckman/ | Screened Website, D1, and auth shapes. Its older runtime adds no stronger pattern than the upstream study. | 4.0.0-beta.107 ≠ | 2.0.0-beta.72 ≠ | — | 2026-09-232026-10-09 | same-version-repos |
| C | monaxovdulov/ | Screened: travel-demo UI uses XState 6, but no Effect lifecycle integration in its project manifest. | — | — | 6.0.0-alpha.40 ≠— | 2026-10-012026-10-09 | Manifest/README screening only |
| C | oscarmarina/ | Screened: Web Component controller pins XState 6, but no Effect or server lifecycle seam in inspected manifests. | — | — | 6.0.0-alpha.65 =³— | 2026-10-012026-10-09 | Manifest/README screening only |
| C | SMILEY4/ | Screened: browser strategy-game UI pins XState 6; no Effect integration in its webapp manifest. | — | — | 6.0.0-alpha.49 ≠⁴— | 2026-10-012026-10-09 | Manifest/README screening only |
| E | zonko-ai/ | Last commit June 5. Earlier symbol screening found no relevant client or resource pattern for this upgrade. | 4.0.0-beta.66; 4.0.0-beta.70 ≠⁵⁶ | 2.0.0-beta.44 ≠ | — | 2026-09-232026-10-09 | same-version-repos |
¹ catalog
² locked from ^2.0.0-beta.77
³ locked from ^6.0.0-alpha.65
⁴ locked from ^6.0.0-alpha.49
⁵ tooling catalog
⁶ SDK peer
Version receipts
These links freeze the default-branch source at each checked date. The linked study supports each tier finding; shared pins alone do not establish adoption. Alchemy’s workspace Effect override resolves its catalog range; library peer ranges are not application pins.
- alchemy-run/alchemy,
main, checked 2026-10-09: workspace catalog and overrides, Alchemy package version. - foldkit/foldkit,
main, checked 2026-10-09: checked packages/foldkit/package.json, checked packages/vite-plugin-foldkit/package.json. - just-be-dev/effect-cloudflare-foldkit-template,
main, checked 2026-10-09: checked package.json. - beep-effect/beep-effect,
main, checked 2026-10-09: stable Effect and XState catalogs, XState driver catalog consumers. - MapleTechLabs/hazel,
main, checked 2026-10-09: checked package.json, checked apps/web-foldkit/package.json, checked bun.lock. - MapleTechLabs/maple,
main, checked 2026-10-09: root catalogs. - pingdotgg/t3code,
main, checked 2026-10-09: Effect catalog, relay infra manifest. - smithersai/smithers,
main, checked 2026-10-09: root Effect pin, infra manifest. - 851-labs/tokenmaxxing,
main, checked 2026-10-09: root catalogs. - BleedingDev/dx-feature-tracker,
main, checked 2026-10-09: package.json, packages/core/package.json, pnpm-lock.yaml, README.md. - chr33s/bye,
main, checked 2026-10-09: checked package.json. - Consensys/c0,
master, checked 2026-10-09: checked package.json, checked packages/infra/package.json. - danieljvdm/effect-agent,
main, checked 2026-10-09: root catalog. - danieljvdm/effect-cf,
main, checked 2026-10-09: root catalog range, locked Effect 4.0.0, pipeline tooling pins. - davidkpiano/rivet-xstate,
main, checked 2026-10-09: package.json, pnpm-lock.yaml, README.md. - deathbyknowledge/gsv,
main, checked 2026-10-09: checked package.json, checked deployment/package.json. - Ernxst/veyor,
main, checked 2026-10-09: packages/core/package.json, bun.lock, README.md. - Heilonng23/openheard,
main, checked 2026-10-09: infra manifest. - humanlayer/fold,
main, checked 2026-10-09: root catalog, Cloudflare example. - irfndi/prism-liquidity-agent,
main, checked 2026-10-09: root, Cloudflare, infra. - joelhooks/expanded-cinema,
main, checked 2026-10-09: apps/melt-01/package.json, packages/infra/package.json, pnpm-lock.yaml, README.md. - julia-script/graph-engineering,
main, checked 2026-10-09: package.json, packages/runtime/package.json, pnpm-lock.yaml, README.md. - krl-gr/upcomputer,
main, checked 2026-10-09: checked pnpm-workspace.yaml, checked infra/relay/package.json. - Manzanita-Research/frontier-lab-tycoon,
main, checked 2026-10-09: checked package.json, checked packages/flt-mod-cli/package.json. - OzakIOne/vitesakuga,
master, checked 2026-10-09: package.json, pnpm-lock.yaml, README.md. - pinebasedev/svelteflare,
main, checked 2026-10-09: checked package.json. - pkishorez/monorepo,
main, checked 2026-10-09: checked pnpm-workspace.yaml, checked apps/kstack/package.json. - plannotator/artifact-server,
main, checked 2026-10-09: root, Cloudflare deploy. - restatedev/xstate-transitions,
main, checked 2026-10-09: packages/xstate-transitions/package.json, pnpm-workspace.yaml, pnpm-lock.yaml, README.md. - samyakkkk/flow,
main, checked 2026-10-09: checked pnpm-workspace.yaml, checked infra/relay/package.json. - SandroMaglione/mai-macros,
main, checked 2026-10-09: apps/mobile/package.json, packages/machines/package.json, pnpm-lock.yaml. - statelyai/agent,
next, checked 2026-10-09: package.json, pnpm-lock.yaml, readme.md. - statelyai/jevspresso,
main, checked 2026-10-09: checked package.json, checked packages/jev/package.json. - statelyai/schema,
main, checked 2026-10-09: package.json, pnpm-lock.yaml, README.md. - taucad/tau,
main, checked 2026-10-09: checked pnpm-workspace.yaml, checked package.json. - yehudacohen/typekro,
master, checked 2026-10-09: root manifest. - yielded-dev/auth,
main, checked 2026-10-09: checked package.json, checked packages/auth/package.json. - 13kparkin/Pivot,
main, checked 2026-10-09: checked pnpm-workspace.yaml, checked infra/relay/package.json. - cameronapak/dotflowy,
main, checked 2026-10-09: root manifest. - Dhravya/radish,
main, checked 2026-10-09: root range and pin, locked Alchemy beta.77. - dmmulroy/overseer,
main, checked 2026-10-09: root manifest. - elianiva/elianiva.com,
master, checked 2026-10-09: checked package.json. - every-app/open-seo,
main, checked 2026-10-09: checked package.json. - imaimai17468/imaimai-front-templete,
main, checked 2026-10-09: checked package.json. - instructa/planr,
main, checked 2026-10-09: checked site/deploy/package.json. - jonbeckman/solstatus,
master, checked 2026-10-09: checked package.json. - monaxovdulov/tutu-diff-hackaton,
main, checked 2026-10-09: package.json, pnpm-lock.yaml, README.md. - oscarmarina/blockquote-web-components,
main, checked 2026-10-09: packages/controllers/blockquote-controller-xstate/package.json, package-lock.json, README.md. - SMILEY4/strategy-game,
develop, checked 2026-10-09: webapp/package.json, webapp/package-lock.json, README.md. - zonko-ai/harbor-sdk,
main, checked 2026-10-09: checked package.json, checked packages/sdk/package.json.
Last changed 2026-10-06 in 9f29173. Source on GitHub. Change log.
Linked from
- Agent rules for rat-stack (AGENTS.md). What you may change, which commands to run, and which changes need approval.
The content build reads our pins from manifests and filters/sorts that dataset into .brain/resources/peers.svx; never hand-edit table rows.
- find-peers. Refresh public peers, exact stack versions, and usefulness tiers every week or two and after each shared dependency update. Study source before adopting patterns.
Link context
The content build reads that one dataset, sorts by tier then repository name, and renders .brain/resources/peers.svx: S, A, and B in the main table; C through F in a collapsed Also seen list.
- gardener. Keep rat-stack current and clean. Update exact dependency versions, learn from repos on the same versions, and add lint rules before cleanup.
Link context
The content build reads rat-stack’s current pins from its manifests and filters/sorts this one dataset into .brain/resources/peers.svx; do not hand-edit table rows.