From b78a3b568e1ec6fd159abca709502cac72cb0271 Mon Sep 17 00:00:00 2001
From: Aiden Cline <aidenpcline@gmail.com>
Date: Sun, 12 Apr 2026 20:49:56 -0500
Subject: [PATCH] tweak: adjust session getUsage function to use more up to
 date LanguageModelUsage instead of LanguageModelV2Usage

---
 packages/opencode/src/session/index.ts        | 16 ++--
 .../opencode/test/session/compaction.test.ts  | 96 +++++++++++++++++--
 2 files changed, 99 insertions(+), 13 deletions(-)

diff --git a/packages/opencode/src/session/index.ts b/packages/opencode/src/session/index.ts
index 3d4903588159..b43b724a008a 100644
--- a/packages/opencode/src/session/index.ts
+++ b/packages/opencode/src/session/index.ts
@@ -4,7 +4,7 @@ import { BusEvent } from "@/bus/bus-event"
 import { Bus } from "@/bus"
 import { Decimal } from "decimal.js"
 import z from "zod"
-import { type ProviderMetadata } from "ai"
+import { type ProviderMetadata, type LanguageModelUsage } from "ai"
 import { Flag } from "../flag/flag"
 import { Installation } from "../installation"
 
@@ -28,7 +28,6 @@ import { SessionID, MessageID, PartID } from "./schema"
 import type { Provider } from "@/provider/provider"
 import { Permission } from "@/permission"
 import { Global } from "@/global"
-import type { LanguageModelV2Usage } from "@ai-sdk/provider"
 import { Effect, Layer, Option, Context } from "effect"
 import { makeRuntime } from "@/effect/run-service"
 
@@ -240,7 +239,7 @@ export namespace Session {
 
   export const getUsage = (input: {
     model: Provider.Model
-    usage: LanguageModelV2Usage
+    usage: LanguageModelUsage
     metadata?: ProviderMetadata
   }) => {
     const safe = (value: number) => {
@@ -249,11 +248,14 @@ export namespace Session {
     }
     const inputTokens = safe(input.usage.inputTokens ?? 0)
     const outputTokens = safe(input.usage.outputTokens ?? 0)
-    const reasoningTokens = safe(input.usage.reasoningTokens ?? 0)
+    const reasoningTokens = safe(input.usage.outputTokenDetails?.reasoningTokens ?? input.usage.reasoningTokens ?? 0)
 
-    const cacheReadInputTokens = safe(input.usage.cachedInputTokens ?? 0)
+    const cacheReadInputTokens = safe(
+      input.usage.inputTokenDetails?.cacheReadTokens ?? input.usage.cachedInputTokens ?? 0,
+    )
     const cacheWriteInputTokens = safe(
-      (input.metadata?.["anthropic"]?.["cacheCreationInputTokens"] ??
+      (input.usage.inputTokenDetails?.cacheWriteTokens ??
+        input.metadata?.["anthropic"]?.["cacheCreationInputTokens"] ??
         // google-vertex-anthropic returns metadata under "vertex" key
         // (AnthropicMessagesLanguageModel custom provider key from 'vertex.anthropic.messages')
         input.metadata?.["vertex"]?.["cacheCreationInputTokens"] ??
@@ -274,7 +276,7 @@ export namespace Session {
     const tokens = {
       total,
       input: adjustedInputTokens,
-      output: outputTokens - reasoningTokens,
+      output: safe(outputTokens - reasoningTokens),
       reasoning: reasoningTokens,
       cache: {
         write: cacheWriteInputTokens,
diff --git a/packages/opencode/test/session/compaction.test.ts b/packages/opencode/test/session/compaction.test.ts
index 76a83c34da00..61b47df34aba 100644
--- a/packages/opencode/test/session/compaction.test.ts
+++ b/packages/opencode/test/session/compaction.test.ts
@@ -1005,6 +1005,15 @@ describe("session.getUsage", () => {
         inputTokens: 1000,
         outputTokens: 500,
         totalTokens: 1500,
+        inputTokenDetails: {
+          noCacheTokens: undefined,
+          cacheReadTokens: undefined,
+          cacheWriteTokens: undefined,
+        },
+        outputTokenDetails: {
+          textTokens: undefined,
+          reasoningTokens: undefined,
+        },
       },
     })
 
@@ -1023,7 +1032,15 @@ describe("session.getUsage", () => {
         inputTokens: 1000,
         outputTokens: 500,
         totalTokens: 1500,
-        cachedInputTokens: 200,
+        inputTokenDetails: {
+          noCacheTokens: 800,
+          cacheReadTokens: 200,
+          cacheWriteTokens: undefined,
+        },
+        outputTokenDetails: {
+          textTokens: undefined,
+          reasoningTokens: undefined,
+        },
       },
     })
 
@@ -1039,6 +1056,15 @@ describe("session.getUsage", () => {
         inputTokens: 1000,
         outputTokens: 500,
         totalTokens: 1500,
+        inputTokenDetails: {
+          noCacheTokens: undefined,
+          cacheReadTokens: undefined,
+          cacheWriteTokens: undefined,
+        },
+        outputTokenDetails: {
+          textTokens: undefined,
+          reasoningTokens: undefined,
+        },
       },
       metadata: {
         anthropic: {
@@ -1059,7 +1085,15 @@ describe("session.getUsage", () => {
         inputTokens: 1000,
         outputTokens: 500,
         totalTokens: 1500,
-        cachedInputTokens: 200,
+        inputTokenDetails: {
+          noCacheTokens: 800,
+          cacheReadTokens: 200,
+          cacheWriteTokens: undefined,
+        },
+        outputTokenDetails: {
+          textTokens: undefined,
+          reasoningTokens: undefined,
+        },
       },
       metadata: {
         anthropic: {},
@@ -1078,7 +1112,15 @@ describe("session.getUsage", () => {
         inputTokens: 1000,
         outputTokens: 500,
         totalTokens: 1500,
-        reasoningTokens: 100,
+        inputTokenDetails: {
+          noCacheTokens: undefined,
+          cacheReadTokens: undefined,
+          cacheWriteTokens: undefined,
+        },
+        outputTokenDetails: {
+          textTokens: 400,
+          reasoningTokens: 100,
+        },
       },
     })
 
@@ -1104,7 +1146,15 @@ describe("session.getUsage", () => {
         inputTokens: 0,
         outputTokens: 1_000_000,
         totalTokens: 1_000_000,
-        reasoningTokens: 250_000,
+        inputTokenDetails: {
+          noCacheTokens: undefined,
+          cacheReadTokens: undefined,
+          cacheWriteTokens: undefined,
+        },
+        outputTokenDetails: {
+          textTokens: 750_000,
+          reasoningTokens: 250_000,
+        },
       },
     })
 
@@ -1121,6 +1171,15 @@ describe("session.getUsage", () => {
         inputTokens: 0,
         outputTokens: 0,
         totalTokens: 0,
+        inputTokenDetails: {
+          noCacheTokens: undefined,
+          cacheReadTokens: undefined,
+          cacheWriteTokens: undefined,
+        },
+        outputTokenDetails: {
+          textTokens: undefined,
+          reasoningTokens: undefined,
+        },
       },
     })
 
@@ -1148,6 +1207,15 @@ describe("session.getUsage", () => {
         inputTokens: 1_000_000,
         outputTokens: 100_000,
         totalTokens: 1_100_000,
+        inputTokenDetails: {
+          noCacheTokens: undefined,
+          cacheReadTokens: undefined,
+          cacheWriteTokens: undefined,
+        },
+        outputTokenDetails: {
+          textTokens: undefined,
+          reasoningTokens: undefined,
+        },
       },
     })
 
@@ -1163,7 +1231,15 @@ describe("session.getUsage", () => {
         inputTokens: 1000,
         outputTokens: 500,
         totalTokens: 1500,
-        cachedInputTokens: 200,
+        inputTokenDetails: {
+          noCacheTokens: 800,
+          cacheReadTokens: 200,
+          cacheWriteTokens: undefined,
+        },
+        outputTokenDetails: {
+          textTokens: undefined,
+          reasoningTokens: undefined,
+        },
       }
       if (npm === "@ai-sdk/amazon-bedrock") {
         const result = Session.getUsage({
@@ -1214,7 +1290,15 @@ describe("session.getUsage", () => {
         inputTokens: 1000,
         outputTokens: 500,
         totalTokens: 1500,
-        cachedInputTokens: 200,
+        inputTokenDetails: {
+          noCacheTokens: 800,
+          cacheReadTokens: 200,
+          cacheWriteTokens: undefined,
+        },
+        outputTokenDetails: {
+          textTokens: undefined,
+          reasoningTokens: undefined,
+        },
       },
       metadata: {
         vertex: {