feat(core): compact durable tool metadata (#38343)

packages/core/src/tool/glob.ts

@@ -8,7 +8,7 @@ import { FileSystem } from "../filesystem"
 import { FSUtil } from "@opencode-ai/util/fs-util"
 import { Location } from "../location"
 import { Ripgrep } from "../ripgrep"
-import { RelativePath } from "../schema"
+import { NonNegativeInt, RelativePath } from "../schema"
 import { PermissionV2 } from "../permission"
 import { Tool } from "./tool"
 
@@ -25,6 +25,9 @@ export const Input = Schema.Struct({
 })
 
 export const Output = Schema.Array(FileSystem.Entry)
+const StructuredOutput = Schema.Struct({
+  count: NonNegativeInt,
+})
 type ModelOutput = typeof Output.Encoded
 
 /** Format raw search results into the concise line-oriented output models expect. */
@@ -51,6 +54,8 @@ export const Plugin = {
               "Find files by glob pattern within the active Location. Returns concise relative file resources. Use a relative path to narrow the search and limit to bound the result count.",
             input: Input,
             output: Output,
+            structured: StructuredOutput,
+            toStructuredOutput: ({ output }) => ({ count: output.length }),
             toModelOutput: ({ output }) => [
               {
                 type: "text",

packages/core/src/tool/grep.ts

@@ -9,7 +9,7 @@ import { FSUtil } from "@opencode-ai/util/fs-util"
 import { Location } from "../location"
 import { PermissionV2 } from "../permission"
 import { Ripgrep } from "../ripgrep"
-import { RelativePath } from "../schema"
+import { NonNegativeInt, RelativePath } from "../schema"
 import { Tool } from "./tool"
 
 export const name = "grep"
@@ -30,6 +30,9 @@ export const Input = Schema.Struct({
 })
 
 export const Output = Schema.Array(FileSystem.Match)
+const StructuredOutput = Schema.Struct({
+  matches: NonNegativeInt,
+})
 type ModelOutput = typeof Output.Encoded
 
 /** Format raw search matches into the familiar concise model output. */
@@ -65,6 +68,8 @@ export const Plugin = {
               "Search file contents by regular expression within the active Location or an absolute managed tool-output file. Use a path to narrow the search, include to filter files by glob, and limit to bound the match count. Returns concise file resources, line numbers, and bounded line previews.",
             input: Input,
             output: Output,
+            structured: StructuredOutput,
+            toStructuredOutput: ({ output }) => ({ matches: output.length }),
             toModelOutput: ({ output }) => [
               {
                 type: "text",

packages/core/src/tool/skill.ts

@@ -21,6 +21,10 @@ export const Output = Schema.Struct({
   directory: Schema.String,
   output: Schema.String,
 })
+const StructuredOutput = Schema.Struct({
+  name: Output.fields.name,
+  directory: Output.fields.directory,
+})
 
 export const description = [
   "Load a specialized skill when the task at hand matches one of the available skills in the instructions.",
@@ -66,6 +70,8 @@ export const Plugin = {
             description,
             input: Input,
             output: Output,
+            structured: StructuredOutput,
+            toStructuredOutput: ({ output }) => ({ name: output.name, directory: output.directory }),
             toModelOutput: ({ output }) => [{ type: "text", text: output.output }],
             execute: (input, context) =>
               Effect.gen(function* () {

packages/core/src/tool/subagent.ts

@@ -31,6 +31,10 @@ export const Output = Schema.Struct({
   status: Schema.Literals(["completed", "running"]),
   output: Schema.String,
 })
+const StructuredOutput = Schema.Struct({
+  sessionID: Output.fields.sessionID,
+  status: Output.fields.status,
+})
 
 export const description = [
   "Spawn a subagent: a child session running a configured agent with fresh context.",
@@ -115,6 +119,8 @@ export const Plugin = {
             description,
             input: Input,
             output: Output,
+            structured: StructuredOutput,
+            toStructuredOutput: ({ output }) => ({ sessionID: output.sessionID, status: output.status }),
             toModelOutput: ({ output }) => [{ type: "text", text: output.output }],
             execute: (input, context) =>
               Effect.gen(function* () {

packages/core/src/tool/webfetch.ts

@@ -37,6 +37,9 @@ const Output = Schema.Struct({
   format: Input.fields.format,
   output: Schema.String,
 })
+const StructuredOutput = Schema.Struct({
+  contentType: Output.fields.contentType,
+})
 
 type Format = (typeof Input.Type)["format"]
 
@@ -126,6 +129,8 @@ export const Plugin = {
             description,
             input: Input,
             output: Output,
+            structured: StructuredOutput,
+            toStructuredOutput: ({ output }) => ({ contentType: output.contentType }),
             toModelOutput: ({ output }) => [{ type: "text", text: output.output }],
             execute: (input, context) =>
               Effect.gen(function* () {

packages/core/src/tool/websearch.ts

@@ -190,6 +190,9 @@ const Output = Schema.Struct({
   provider: Provider,
   text: Schema.String,
 })
+const StructuredOutput = Schema.Struct({
+  provider: Output.fields.provider,
+})
 
 export const Plugin = {
   id: "opencode.tool.websearch",
@@ -206,6 +209,8 @@ export const Plugin = {
             description,
             input: Input,
             output: Output,
+            structured: StructuredOutput,
+            toStructuredOutput: ({ output }) => ({ provider: output.provider }),
             toModelOutput: ({ output }) => [{ type: "text", text: output.text }],
             execute: (input, context) => {
               const provider = selectProvider(context.sessionID, config, config.provider)