[codex] migrate Effect.fn in apps/server/src/provider/Layers/CodexProvider.ts

[juliusmarminge]

Summary

• migrate the remaining () => Effect.gen(...) wrapper in apps/server/src/provider/Layers/CodexProvider.ts to Effect.fn
• keep this PR scoped to a single file as part of the checklist split

Why

• finish the remaining checklist migrations without batching multiple files into one review
• keep exact-empty-arg Effect.gen wrappers out of the codebase

Validation

• bun fmt
• bun lint
• packages/shared: bun run test src/DrainableWorker.test.ts
• apps/server: bun run test src/provider/Layers/EventNdjsonLogger.test.ts src/provider/Layers/ProviderRegistry.test.ts src/provider/Layers/ProviderService.test.ts src/provider/Layers/ProviderAdapterRegistry.test.ts src/keybindings.test.ts src/open.test.ts
• apps/server: bun run test src/orchestration/projector.test.ts
• apps/server: bun run test src/orchestration/Layers/OrchestrationEngine.test.ts -t "returns deterministic read models for repeated reads"
• apps/server: bun run test src/orchestration/Layers/OrchestrationEngine.test.ts -t "archives and unarchives threads through orchestration commands"
• apps/server: bun run test src/orchestration/Layers/OrchestrationEngine.test.ts -t "streams persisted domain events in order"

Notes

• validation was run from the completed checklist scratch branch before splitting these per-file PRs
• bun run test and bun typecheck at the repo root currently fail in apps/web because @effect/atom-react cannot be resolved
• apps/server still has unrelated pre-existing typecheck failures outside this file

Note

Migrate runCodexCommand to Effect.fn in CodexProvider

Refactors runCodexCommand in CodexProvider.ts from an arrow function wrapping Effect.gen to a named Effect.fn("runCodexCommand") call. The generator body is unchanged — it reads codex settings, constructs a ChildProcess, and calls spawnAndCollect.

^{Macroscope summarized 9088bf0.}

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Note

Low Risk
Low risk refactor limited to CodexProvider.ts that changes only how runCodexCommand is defined/wrapped, not what it does. Main risk is subtle typing/stack-trace or effect-labeling differences impacting diagnostics, not behavior.

Overview
Refactors CodexProvider.ts to define runCodexCommand using Effect.fn("runCodexCommand") instead of an arrow function that returned Effect.gen.

The generator body and behavior are unchanged: it still reads Codex settings, constructs a ChildProcess with the same env/shell options, and delegates to spawnAndCollect.

^{Written by Cursor Bugbot for commit 9088bf0. This will update automatically on new commits. Configure here.}

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