fix(core): preserve patch receipt metadata

packages/core/src/tool/edit.ts

@@ -9,8 +9,8 @@ export * as EditTool from "./edit"
 import type { Context as PluginContext } from "@opencode-ai/plugin/v2/effect/plugin"
 import { ToolFailure } from "@opencode-ai/ai"
 import { FileDiff } from "@opencode-ai/schema/file-diff"
-import { diffLines } from "diff"
+import { createTwoFilesPatch, diffLines } from "diff"
-import { Effect, Schema, Struct } from "effect"
+import { Effect, Schema } from "effect"
 import { FileMutation } from "../file-mutation"
 import { FSUtil } from "../fs-util"
 import { LocationMutation } from "../location-mutation"
@@ -31,10 +31,8 @@ export const Input = Schema.Struct({
   }),
 })
 
-const FileInfo = FileDiff.Info.mapFields(Struct.omit(["patch"]))
-
 export const Output = Schema.Struct({
-  files: Schema.Array(FileInfo),
+  files: Schema.Array(FileDiff.Info),
   replacements: Schema.Number,
 })
 export type Output = typeof Output.Type
@@ -202,6 +200,7 @@ export const Plugin = {
                     files: [
                       {
                         file: result.resource,
+                        patch: createTwoFilesPatch(result.resource, result.resource, source.text, replaced),
                         status: "modified" as const,
                         ...counts,
                       },

packages/core/src/tool/patch.ts

@@ -3,8 +3,8 @@ export * as PatchTool from "./patch"
 import type { Context as PluginContext } from "@opencode-ai/plugin/v2/effect/plugin"
 import { ToolFailure } from "@opencode-ai/ai"
 import { FileDiff } from "@opencode-ai/schema/file-diff"
-import { diffLines } from "diff"
+import { createTwoFilesPatch, diffLines } from "diff"
-import { Effect, Schema, Struct } from "effect"
+import { Effect, Schema } from "effect"
 import { FileMutation } from "../file-mutation"
 import { FSUtil } from "../fs-util"
 import { LocationMutation } from "../location-mutation"
@@ -26,11 +26,9 @@ export const Applied = Schema.Struct({
   target: Schema.String,
 })
 
-const FileInfo = FileDiff.Info.mapFields(Struct.omit(["patch"]))
-
 export const Output = Schema.Struct({
   applied: Schema.Array(Applied),
-  files: Schema.Array(FileInfo),
+  files: Schema.Array(FileDiff.Info),
 })
 export type Output = typeof Output.Type
 
@@ -213,7 +211,7 @@ export const Plugin = {
   }),
 }
 
-function patchFile(change: Prepared): typeof FileInfo.Type {
+function patchFile(change: Prepared): typeof FileDiff.Info.Type {
   const counts = diffLines(change.before, change.after).reduce(
     (result, item) => ({
       additions: result.additions + (item.added ? (item.count ?? 0) : 0),
@@ -223,6 +221,7 @@ function patchFile(change: Prepared): typeof FileInfo.Type {
   )
   return {
     file: change.target.resource,
+    patch: createTwoFilesPatch(change.target.resource, change.target.resource, change.before, change.after),
     status: change.type === "add" ? "added" : change.type === "delete" ? "deleted" : "modified",
     ...counts,
   }

packages/core/test/tool-edit.test.ts

@@ -158,10 +158,10 @@ describe("EditTool", () => {
                       status: "modified",
                       additions: 1,
                       deletions: 1,
+                      patch: expect.stringContaining("-before\n+after"),
                     },
                   ],
                 })
-                expect(settled.output?.structured).not.toHaveProperty("files.0.patch")
                 expect(yield* Effect.promise(() => fs.readFile(target, "utf8"))).toBe("after\nrest\n")
                 expect(assertions).toMatchObject([{ sessionID, action: "edit", resources: ["hello.txt"], save: ["*"] }])
                 expect(writes).toEqual([yield* Effect.promise(() => fs.realpath(target))])
@@ -366,7 +366,6 @@ describe("EditTool", () => {
           Effect.andThen((settled) =>
             Effect.gen(function* () {
               expect(settled.output?.structured).toMatchObject({ replacements: 3 })
-              expect(settled.output?.structured).not.toHaveProperty("files.0.patch")
               expect(yield* Effect.promise(() => fs.readFile(target, "utf8"))).toBe("after after after")
               expect(writes).toHaveLength(1)
             }),

packages/core/test/tool-patch.test.ts

@@ -181,24 +181,24 @@ describe("PatchTool", () => {
                       status: "added",
                       additions: 1,
                       deletions: 0,
+                      patch: expect.stringContaining("+created"),
                     },
                     {
                       file: "update.txt",
                       status: "modified",
                       additions: 1,
                       deletions: 1,
+                      patch: expect.stringContaining("-before\n+after"),
                     },
                     {
                       file: "remove.txt",
                       status: "deleted",
                       additions: 0,
                       deletions: 1,
+                      patch: expect.stringContaining("-remove"),
                     },
                   ],
                 })
-                expect(settled.output?.structured).not.toHaveProperty("files.0.patch")
-                expect(settled.output?.structured).not.toHaveProperty("files.1.patch")
-                expect(settled.output?.structured).not.toHaveProperty("files.2.patch")
                 expect(assertions).toMatchObject([
                   { sessionID, action: "edit", resources: ["nested/new.txt", "update.txt", "remove.txt"], save: ["*"] },
                 ])