effect(core): add stdin option to AppProcess.run; migrate snapshot+clipboard (#27224)

packages/core/src/process.ts

@@ -16,6 +16,7 @@ export interface RunOptions {
   readonly maxErrorBytes?: number
   readonly signal?: AbortSignal
   readonly timeout?: Duration.Input
+  readonly stdin?: string | Uint8Array | Stream.Stream<Uint8Array, PlatformError>
 }
 
 export interface RunStreamOptions {
@@ -96,6 +97,15 @@ const waitForAbort = (signal: AbortSignal) =>
     return Effect.sync(() => signal.removeEventListener("abort", onabort))
   })
 
+const normalizeStdin = (
+  input: string | Uint8Array | Stream.Stream<Uint8Array, PlatformError>,
+): Stream.Stream<Uint8Array, PlatformError> =>
+  typeof input === "string"
+    ? Stream.make(new TextEncoder().encode(input))
+    : input instanceof Uint8Array
+      ? Stream.make(input)
+      : input
+
 const collectStream = (stream: Stream.Stream<Uint8Array, PlatformError>, maxOutputBytes: number | undefined) =>
   Stream.runFold(
     stream,
@@ -119,7 +129,7 @@ export const layer = Layer.effect(
   Effect.gen(function* () {
     const spawner = yield* ChildProcessSpawner
 
-    const run = Effect.fn("AppProcess.run")(function* (command: ChildProcess.Command, options?: RunOptions) {
+    const runCommand = (command: ChildProcess.Command, options?: RunOptions) => {
       const description = describeCommand(command)
       const collect = Effect.scoped(
         Effect.gen(function* () {
@@ -154,7 +164,22 @@ export const layer = Layer.effect(
             ),
           )
         : timed
-      return yield* aborted.pipe(Effect.catch((cause) => Effect.fail(wrapError(description, cause))))
+      return aborted.pipe(Effect.catch((cause) => Effect.fail(wrapError(description, cause))))
+    }
+
+    const run = Effect.fn("AppProcess.run")(function* (command: ChildProcess.Command, options?: RunOptions) {
+      if (options?.stdin === undefined) return yield* runCommand(command, options)
+      if (command._tag !== "StandardCommand") {
+        return yield* new AppProcessError({
+          command: describeCommand(command),
+          cause: new Error("stdin option only supports StandardCommand; received PipedCommand"),
+        })
+      }
+      const next = ChildProcess.make(command.command, command.args, {
+        ...command.options,
+        stdin: normalizeStdin(options.stdin),
+      })
+      return yield* runCommand(next, options)
     })
 
     const runStream = (

packages/core/test/process/process.test.ts

@@ -1,4 +1,6 @@
 import { describe, expect } from "bun:test"
+import { realpathSync } from "node:fs"
+import { tmpdir } from "node:os"
 import { Effect, Exit, Stream } from "effect"
 import { ChildProcess } from "effect/unstable/process"
 import { AppProcess } from "@opencode-ai/core/process"
@@ -123,6 +125,82 @@ describe("AppProcess", () => {
     )
   })
 
+  describe("run with stdin option", () => {
+    const echoStdin = "process.stdin.on('data', c => process.stdout.write(c))"
+
+    it.effect(
+      "feeds a string to stdin and returns it on stdout",
+      Effect.gen(function* () {
+        const svc = yield* AppProcess.Service
+        const result = yield* svc.run(cmd("-e", echoStdin), { stdin: "hello" })
+        expect(result.exitCode).toBe(0)
+        expect(result.stdout.toString("utf8")).toBe("hello")
+      }),
+    )
+
+    it.effect(
+      "feeds a Uint8Array to stdin",
+      Effect.gen(function* () {
+        const svc = yield* AppProcess.Service
+        const bytes = new TextEncoder().encode("bytes")
+        const result = yield* svc.run(cmd("-e", echoStdin), { stdin: bytes })
+        expect(result.exitCode).toBe(0)
+        expect(result.stdout.toString("utf8")).toBe("bytes")
+      }),
+    )
+
+    it.effect(
+      "feeds a Stream of Uint8Array chunks to stdin",
+      Effect.gen(function* () {
+        const svc = yield* AppProcess.Service
+        const enc = new TextEncoder()
+        const stream = Stream.fromIterable([enc.encode("one"), enc.encode("-two"), enc.encode("-three")])
+        const result = yield* svc.run(cmd("-e", echoStdin), { stdin: stream })
+        expect(result.exitCode).toBe(0)
+        expect(result.stdout.toString("utf8")).toBe("one-two-three")
+      }),
+    )
+
+    it.effect(
+      "completes correctly with empty input",
+      Effect.gen(function* () {
+        const svc = yield* AppProcess.Service
+        const result = yield* svc.run(cmd("-e", echoStdin), { stdin: "" })
+        expect(result.exitCode).toBe(0)
+        expect(result.stdout.toString("utf8")).toBe("")
+      }),
+    )
+
+    it.effect(
+      "carries existing Command options like env",
+      Effect.gen(function* () {
+        const svc = yield* AppProcess.Service
+        const script =
+          "process.stdout.write(process.env.FEED + ':'); process.stdin.on('data', c => process.stdout.write(c))"
+        const command = ChildProcess.make(NODE, ["-e", script], { env: { FEED: "envset" }, extendEnv: true })
+        const result = yield* svc.run(command, { stdin: "payload" })
+        expect(result.exitCode).toBe(0)
+        expect(result.stdout.toString("utf8")).toBe("envset:payload")
+      }),
+    )
+
+    it.effect(
+      "carries existing Command options like cwd",
+      Effect.gen(function* () {
+        const svc = yield* AppProcess.Service
+        const dir = realpathSync(tmpdir())
+        const script =
+          "process.stdout.write(process.cwd() + '|'); process.stdin.on('data', c => process.stdout.write(c))"
+        const command = ChildProcess.make(NODE, ["-e", script], { cwd: dir })
+        const result = yield* svc.run(command, { stdin: "ok" })
+        expect(result.exitCode).toBe(0)
+        const [cwd, stdin] = result.stdout.toString("utf8").split("|")
+        expect(realpathSync(cwd)).toBe(dir)
+        expect(stdin).toBe("ok")
+      }),
+    )
+  })
+
   describe("runStream", () => {
     it.live(
       "emits lines incrementally and ends cleanly on exit 0",
@@ -136,11 +214,17 @@ describe("AppProcess", () => {
     )
 
     it.live(
-      "fails with AppProcessError when exit not in okExitCodes",
+      "okExitCodes determines whether a non-zero exit fails the stream",
       Effect.gen(function* () {
         const svc = yield* AppProcess.Service
+        const allowed = yield* svc
+          .runStream(cmd("-e", "console.log('only'); process.exit(1)"), { okExitCodes: [0, 1] })
+          .pipe(Stream.runCollect)
+        expect(Array.from(allowed)).toEqual(["only"])
         const exit = yield* Effect.exit(
-          svc.runStream(cmd("-e", "console.log('a'); process.exit(2)"), { okExitCodes: [0] }).pipe(Stream.runCollect),
+          svc
+            .runStream(cmd("-e", "console.log('a'); process.exit(2)"), { okExitCodes: [0, 1] })
+            .pipe(Stream.runCollect),
         )
         expect(Exit.isFailure(exit)).toBe(true)
         if (Exit.isFailure(exit)) {
@@ -152,17 +236,6 @@ describe("AppProcess", () => {
       }),
     )
 
-    it.live(
-      "okExitCodes allowlist treats non-zero as success",
-      Effect.gen(function* () {
-        const svc = yield* AppProcess.Service
-        const result = yield* svc
-          .runStream(cmd("-e", "console.log('only'); process.exit(1)"), { okExitCodes: [0, 1] })
-          .pipe(Stream.runCollect)
-        expect(Array.from(result)).toEqual(["only"])
-      }),
-    )
-
     it.live(
       "without okExitCodes, never fails on exit code",
       Effect.gen(function* () {
@@ -177,12 +250,10 @@ describe("AppProcess", () => {
       Effect.gen(function* () {
         const svc = yield* AppProcess.Service
         const controller = new AbortController()
-        setTimeout(() => controller.abort(), 50)
+        controller.abort()
         const exit = yield* Effect.exit(
           svc
-            .runStream(cmd("-e", "setInterval(() => console.log('tick'), 100); setTimeout(() => {}, 60_000)"), {
+            .runStream(cmd("-e", "setInterval(() => {}, 60_000)"), { signal: controller.signal })
-              signal: controller.signal,
-            })
             .pipe(Stream.runCollect),
         )
         expect(Exit.isFailure(exit)).toBe(true)

packages/opencode/src/cli/cmd/tui/util/clipboard.ts

@@ -3,9 +3,21 @@ import { lazy } from "../../../../util/lazy.js"
 import { tmpdir } from "os"
 import path from "path"
 import fs from "fs/promises"
+import { Effect } from "effect"
+import { ChildProcess } from "effect/unstable/process"
+import { AppProcess } from "@opencode-ai/core/process"
 import * as Filesystem from "../../../../util/filesystem"
 import * as Process from "../../../../util/process"
 
+const writeWithStdin = (cmd: string[], text: string): Promise<void> =>
+  Effect.runPromise(
+    AppProcess.Service.use((svc) => svc.run(ChildProcess.make(cmd[0]!, cmd.slice(1)), { stdin: text })).pipe(
+      Effect.provide(AppProcess.defaultLayer),
+      Effect.catch(() => Effect.void),
+      Effect.asVoid,
+    ),
+  ).catch(() => undefined)
+
 // Lazy load which and clipboardy to avoid expensive execa/which/isexe chain at startup
 const getWhich = lazy(async () => {
   const { which } = await import("../../../../util/which")
@@ -125,49 +137,23 @@ const getCopyMethod = lazy(async () => {
   if (os === "linux") {
     if (process.env["WAYLAND_DISPLAY"] && which("wl-copy")) {
       console.log("clipboard: using wl-copy")
-      return async (text: string) => {
+      return (text: string) => writeWithStdin(["wl-copy"], text)
-        const proc = Process.spawn(["wl-copy"], { stdin: "pipe", stdout: "ignore", stderr: "ignore" })
-        if (!proc.stdin) return
-        proc.stdin.write(text)
-        proc.stdin.end()
-        await proc.exited.catch(() => {})
-      }
     }
     if (which("xclip")) {
       console.log("clipboard: using xclip")
-      return async (text: string) => {
+      return (text: string) => writeWithStdin(["xclip", "-selection", "clipboard"], text)
-        const proc = Process.spawn(["xclip", "-selection", "clipboard"], {
-          stdin: "pipe",
-          stdout: "ignore",
-          stderr: "ignore",
-        })
-        if (!proc.stdin) return
-        proc.stdin.write(text)
-        proc.stdin.end()
-        await proc.exited.catch(() => {})
-      }
     }
     if (which("xsel")) {
       console.log("clipboard: using xsel")
-      return async (text: string) => {
+      return (text: string) => writeWithStdin(["xsel", "--clipboard", "--input"], text)
-        const proc = Process.spawn(["xsel", "--clipboard", "--input"], {
-          stdin: "pipe",
-          stdout: "ignore",
-          stderr: "ignore",
-        })
-        if (!proc.stdin) return
-        proc.stdin.write(text)
-        proc.stdin.end()
-        await proc.exited.catch(() => {})
-      }
     }
   }
 
   if (os === "win32") {
     console.log("clipboard: using powershell")
-    return async (text: string) => {
+    return (text: string) =>
       // Pipe via stdin to avoid PowerShell string interpolation ($env:FOO, $(), etc.)
-      const proc = Process.spawn(
+      writeWithStdin(
         [
           "powershell.exe",
           "-NonInteractive",
@@ -175,18 +161,8 @@ const getCopyMethod = lazy(async () => {
           "-Command",
           "[Console]::InputEncoding = [System.Text.Encoding]::UTF8; Set-Clipboard -Value ([Console]::In.ReadToEnd())",
         ],
-        {
+        text,
-          stdin: "pipe",
-          stdout: "ignore",
-          stderr: "ignore",
-        },
       )
-
-      if (!proc.stdin) return
-      proc.stdin.write(text)
-      proc.stdin.end()
-      await proc.exited.catch(() => {})
-    }
   }
 
   console.log("clipboard: no native support")

packages/opencode/src/snapshot/index.ts

@@ -1,4 +1,4 @@
-import { Cause, Duration, Effect, Layer, Schedule, Schema, Semaphore, Context, Stream } from "effect"
+import { Cause, Duration, Effect, Layer, Schedule, Schema, Semaphore, Context } from "effect"
 import { ChildProcess, ChildProcessSpawner } from "effect/unstable/process"
 import { formatPatch, structuredPatch } from "diff"
 import path from "path"
@@ -84,48 +84,13 @@ export const layer: Layer.Layer<Service, never, AppFileSystem.Service | AppProce
 
           const args = (cmd: string[]) => ["--git-dir", state.gitdir, "--work-tree", state.worktree, ...cmd]
 
-          const enc = new TextEncoder()
+          const feed = (list: string[]) => list.join("\0") + "\0"
-          const feed = (list: string[]) => Stream.make(enc.encode(list.join("\0") + "\0"))
-
-          const gitWithStdin = Effect.fnUntraced(
-            function* (
-              cmd: string[],
-              opts: { cwd?: string; env?: Record<string, string>; stdin: ChildProcess.CommandInput },
-            ) {
-              // stdin-feed calls still need raw spawn — AppProcess.run does not yet
-              // expose a stdin Stream API. Tracked as future AppProcess helper.
-              const proc = ChildProcess.make("git", cmd, {
-                cwd: opts.cwd,
-                env: opts.env,
-                extendEnv: true,
-                stdin: opts.stdin,
-              })
-              const handle = yield* appProcess.spawn(proc)
-              const [text, stderr] = yield* Effect.all(
-                [Stream.mkString(Stream.decodeText(handle.stdout)), Stream.mkString(Stream.decodeText(handle.stderr))],
-                { concurrency: 2 },
-              )
-              const code = yield* handle.exitCode
-              return { code, text, stderr } satisfies GitResult
-            },
-            Effect.scoped,
-            Effect.catch((err) =>
-              Effect.succeed({
-                code: ChildProcessSpawner.ExitCode(1),
-                text: "",
-                stderr: err instanceof Error ? err.message : String(err),
-              }),
-            ),
-          )
 
           const git = Effect.fnUntraced(
-            function* (cmd: string[], opts?: { cwd?: string; env?: Record<string, string> }) {
+            function* (cmd: string[], opts?: { cwd?: string; env?: Record<string, string>; stdin?: string }) {
               const result = yield* appProcess.run(
-                ChildProcess.make("git", cmd, {
+                ChildProcess.make("git", cmd, { cwd: opts?.cwd, env: opts?.env, extendEnv: true }),
-                  cwd: opts?.cwd,
+                { stdin: opts?.stdin },
-                  env: opts?.env,
-                  extendEnv: true,
-                }),
               )
               return {
                 code: ChildProcessSpawner.ExitCode(result.exitCode),
@@ -144,7 +109,7 @@ export const layer: Layer.Layer<Service, never, AppFileSystem.Service | AppProce
 
           const ignore = Effect.fnUntraced(function* (files: string[]) {
             if (!files.length) return new Set<string>()
-            const check = yield* gitWithStdin(
+            const check = yield* git(
               [
                 ...quote,
                 "--git-dir",
@@ -167,7 +132,7 @@ export const layer: Layer.Layer<Service, never, AppFileSystem.Service | AppProce
 
           const drop = Effect.fnUntraced(function* (files: string[]) {
             if (!files.length) return
-            yield* gitWithStdin(
+            yield* git(
               [
                 ...cfg,
                 ...args(["rm", "--cached", "-f", "--ignore-unmatch", "--pathspec-from-file=-", "--pathspec-file-nul"]),
@@ -181,7 +146,7 @@ export const layer: Layer.Layer<Service, never, AppFileSystem.Service | AppProce
 
           const stage = Effect.fnUntraced(function* (files: string[]) {
             if (!files.length) return
-            const result = yield* gitWithStdin(
+            const result = yield* git(
               [...cfg, ...args(["add", "--all", "--sparse", "--pathspec-from-file=-", "--pathspec-file-nul"])],
               {
                 cwd: state.directory,
@@ -590,26 +555,21 @@ export const layer: Layer.Layer<Service, never, AppFileSystem.Service | AppProce
                     })
                     if (!refs.length) return new Map<string, { before: string; after: string }>()
 
-                    // cat-file --batch is a stdin-feed call — kept on raw spawn
+                    const batch = yield* appProcess.run(
-                    // until AppProcess.run exposes a stdin Stream API.
+                      ChildProcess.make("git", [...cfg, ...args(["cat-file", "--batch"])], {
-                    const proc = ChildProcess.make("git", [...cfg, ...args(["cat-file", "--batch"])], {
+                        cwd: state.directory,
-                      cwd: state.directory,
+                        extendEnv: true,
-                      extendEnv: true,
+                      }),
-                      stdin: Stream.make(new TextEncoder().encode(refs.map((item) => item.ref).join("\n") + "\n")),
+                      { stdin: refs.map((item) => item.ref).join("\n") + "\n" },
-                    })
-                    const handle = yield* appProcess.spawn(proc)
-                    const [out, err] = yield* Effect.all(
-                      [Stream.mkUint8Array(handle.stdout), Stream.mkString(Stream.decodeText(handle.stderr))],
-                      { concurrency: 2 },
                     )
-                    const code = yield* handle.exitCode
+                    if (batch.exitCode !== 0) {
-                    if (code !== 0) {
                       log.info("git cat-file --batch failed during snapshot diff, falling back to per-file git show", {
-                        stderr: err,
+                        stderr: batch.stderr.toString("utf8"),
                         refs: refs.length,
                       })
                       return
                     }
+                    const out = batch.stdout
 
                     const fail = (msg: string, extra?: Record<string, string>) => {
                       log.info(msg, { ...extra, refs: refs.length })