refactor(core): convert compact structured projections to metadata

packages/core/src/session/generate-node.ts

@@ -36,8 +36,8 @@ export const layer = Layer.effect(
         const promptCacheKey = /^ses_[0-9a-f]{64}$/.test(selection.session.id)
           ? selection.session.id.slice(4)
           : selection.session.id
-        const executableTools = yield* registry.materialize(selection.agent.info.permissions)
-        const toolDefinitions = executableTools.definitions
+        const toolSet = yield* registry.snapshot(selection.agent.info.permissions)
+        const toolDefinitions = toolSet.definitions
         const toolsByName = new Map(toolDefinitions.map((tool) => [tool.name, tool]))
         const contextEvent = yield* hooks.trigger("session", "context", {
           sessionID: selection.session.id,
@@ -52,7 +52,10 @@ export const layer = Layer.effect(
             Message.user(input.prompt),
           ],
           tools: Object.fromEntries(
-            toolDefinitions.map((tool) => [tool.name, { description: tool.description, input: { ...tool.inputSchema } }]),
+            toolDefinitions.map((tool) => [
+              tool.name,
+              { description: tool.description, input: { ...tool.inputSchema } },
+            ]),
           ),
         })
         const hookedTools = Object.entries(contextEvent.tools).flatMap(([name, tool]) => {

packages/core/src/tool/glob.ts

@@ -25,9 +25,6 @@ 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. */
@@ -54,8 +51,7 @@ 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 }),
+            toMetadata: ({ output }) => ({ count: output.length }),
             toModelOutput: ({ output }) => [
               {
                 type: "text",

packages/core/src/tool/grep.ts

@@ -30,9 +30,6 @@ 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. */
@@ -68,8 +65,7 @@ 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 }),
+            toMetadata: ({ output }) => ({ matches: output.length }),
             toModelOutput: ({ output }) => [
               {
                 type: "text",

packages/core/src/tool/skill.ts

@@ -21,11 +21,6 @@ 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.",
   "",
@@ -70,8 +65,7 @@ export const Plugin = {
             description,
             input: Input,
             output: Output,
-            structured: StructuredOutput,
-            toStructuredOutput: ({ output }) => ({ name: output.name, directory: output.directory }),
+            toMetadata: ({ 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

@@ -31,11 +31,6 @@ 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.",
   "Foreground (default) runs the subagent to completion and returns its final response.",
@@ -119,8 +114,7 @@ export const Plugin = {
             description,
             input: Input,
             output: Output,
-            structured: StructuredOutput,
-            toStructuredOutput: ({ output }) => ({ sessionID: output.sessionID, status: output.status }),
+            toMetadata: ({ 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

@@ -37,10 +37,6 @@ 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"]
 
 const acceptHeader = (format: Format) => {
@@ -129,8 +125,7 @@ export const Plugin = {
             description,
             input: Input,
             output: Output,
-            structured: StructuredOutput,
-            toStructuredOutput: ({ output }) => ({ contentType: output.contentType }),
+            toMetadata: ({ output }) => ({ contentType: output.contentType }),
             toModelOutput: ({ output }) => [{ type: "text", text: output.output }],
             execute: (input, context) =>
               Effect.gen(function* () {

packages/core/src/tool/websearch.ts

@@ -190,10 +190,6 @@ const Output = Schema.Struct({
   provider: Provider,
   text: Schema.String,
 })
-const StructuredOutput = Schema.Struct({
-  provider: Output.fields.provider,
-})
-
 export const Plugin = {
   id: "opencode.tool.websearch",
   effect: Effect.fn("WebSearchTool.Plugin")(function* (ctx: PluginContext) {
@@ -209,8 +205,7 @@ export const Plugin = {
             description,
             input: Input,
             output: Output,
-            structured: StructuredOutput,
-            toStructuredOutput: ({ output }) => ({ provider: output.provider }),
+            toMetadata: ({ output }) => ({ provider: output.provider }),
             toModelOutput: ({ output }) => [{ type: "text", text: output.text }],
             execute: (input, context) => {
               const provider = selectProvider(context.sessionID, config, config.provider)