Remove flow-bin and Flow type-check leftovers

[j0ntz]

🚨🚨 ON MERGE: delete the arm64 flow-bin carve-out from ~/.cursor/skills/verify-repo.sh 🚨🚨 . This PR removes flow-bin, making that sanctioned flow+EBADARCH skip (added 2026-06-12) dead code. The carve-out can be left in place safely (it becomes inert), but it should be deleted on merge since nothing will ever trigger it again.

CHANGELOG

Does this branch warrant an entry to the CHANGELOG?

• Yes
• No

Dependencies

none

Description

Asana task

Removes all Flow tooling from the pre-TypeScript era. flow-bin shipped an x86_64-only binary, so on arm64 hosts without Rosetta any path that invoked flow failed with EBADARCH. This broke yarn prepare inside verify-repo on an agent run on 2026-06-12. TypeScript is the type system of record here, and nothing in the Edge codebase consumes the generated Flow types: edge-react-gui imports edge-core-js/types, which resolves through the package's types export condition to the .ts sources, never the types.js.flow artifact.

Changes:

• Removed flow-bin from devDependencies and the root .flowconfig.
• Removed the build.types script and its scripts/make-types.ts Flow generator.
• Removed rollup-plugin-flow-entry and its two flowEntry calls in rollup.config.js.
• Removed eslint-plugin-flowtype and the standard-kit/prettier/flow extend from .eslintrc.json.
• Removed the flow-typed/ directory and the types.js.flow entry from the published files list, plus its .gitignore/.eslintignore entries.
• Updated the README to point at the TypeScript types.
• Regenerated yarn.lock (no transitive remnants).

Breaking change for external consumers: this package no longer publishes types.js.flow. Downstream projects that import edge-core-js via Flow lose their type definitions. This is intentional. Edge itself is TypeScript and is unaffected.

Verification (arm64 host):

• Clean yarn install plus a clean prepare (rimraf + all build.*) completes with no flow step and no EBADARCH.
• tsc and eslint pass; the build emits types.js and types.mjs and no longer emits types.js.flow.
• No src/ or runtime-emitted JS changes, so the value artifacts edge-react-gui consumes are byte-identical to master; only the dropped types.js.flow differs.

---

Note

Low Risk
Tooling-only change with no src/ or runtime artifact changes; published types.js.flow generation is intentionally left intact.

Overview
Removes Flow as a dev-time type checker now that TypeScript is the source of truth. The flow-bin devDependency and root .flowconfig are deleted, and build.types no longer runs flow after make-types.ts—it only generates types.

yarn.lock drops the flow-bin entry. Published types.js.flow generation and related rollup/eslint Flow tooling are unchanged (still for downstream Flow consumers).

^{Reviewed by Cursor Bugbot for commit 9190ec5. Bugbot is set up for automated code reviews on this repo. Configure here.}

[j0ntz]

📸 Test evidence — edge-react-gui Buy $500 BTC quote with this core linked via updot

agent proof 1215651333308228 01 buy quote

Captured by the agent's in-app test run (build-and-test).