core: tweak edit and write tool outputs to prevent agent from thinking edit didn't apply

packages/opencode/src/tool/edit.ts

@@ -119,7 +119,7 @@ export const EditTool = Tool.define("edit", {
       },
     })
 
-    let output = ""
+    let output = "Edit applied successfully."
     await LSP.touchFile(filePath, true)
     const diagnostics = await LSP.diagnostics()
     const normalizedFilePath = Filesystem.normalizePath(filePath)
@@ -129,7 +129,7 @@ export const EditTool = Tool.define("edit", {
       const limited = errors.slice(0, MAX_DIAGNOSTICS_PER_FILE)
       const suffix =
         errors.length > MAX_DIAGNOSTICS_PER_FILE ? `\n... and ${errors.length - MAX_DIAGNOSTICS_PER_FILE} more` : ""
-      output += `\nThis file has errors, please fix\n<file_diagnostics>\n${limited.map(LSP.Diagnostic.pretty).join("\n")}${suffix}\n</file_diagnostics>\n`
+      output += `\n\nLSP errors detected in this file:\n<diagnostics file="${filePath}">\n${limited.map(LSP.Diagnostic.pretty).join("\n")}${suffix}\n</diagnostics>`
     }
 
     return {

packages/opencode/src/tool/write.ts

@@ -47,7 +47,7 @@ export const WriteTool = Tool.define("write", {
     })
     FileTime.read(ctx.sessionID, filepath)
 
-    let output = ""
+    let output = "Wrote file successfully."
     await LSP.touchFile(filepath, true)
     const diagnostics = await LSP.diagnostics()
     const normalizedFilepath = Filesystem.normalizePath(filepath)
@@ -59,12 +59,12 @@ export const WriteTool = Tool.define("write", {
       const suffix =
         errors.length > MAX_DIAGNOSTICS_PER_FILE ? `\n... and ${errors.length - MAX_DIAGNOSTICS_PER_FILE} more` : ""
       if (file === normalizedFilepath) {
-        output += `\nThis file has errors, please fix\n<file_diagnostics>\n${limited.map(LSP.Diagnostic.pretty).join("\n")}${suffix}\n</file_diagnostics>\n`
+        output += `\n\nLSP errors detected in this file:\n<diagnostics file="${filepath}">\n${limited.map(LSP.Diagnostic.pretty).join("\n")}${suffix}\n</diagnostics>`
         continue
       }
       if (projectDiagnosticsCount >= MAX_PROJECT_DIAGNOSTICS_FILES) continue
       projectDiagnosticsCount++
-      output += `\n<project_diagnostics>\n${file}\n${limited.map(LSP.Diagnostic.pretty).join("\n")}${suffix}\n</project_diagnostics>\n`
+      output += `\n\nLSP errors detected in other files:\n<diagnostics file="${file}">\n${limited.map(LSP.Diagnostic.pretty).join("\n")}${suffix}\n</diagnostics>`
     }
 
     return {