From a9bf1c050544bbf8e7975e15f1cdcf1dbde23ce0 Mon Sep 17 00:00:00 2001
From: Dax Raad <d@ironbay.co>
Date: Thu, 5 Mar 2026 22:03:24 -0500
Subject: [PATCH] refactor: replace Bun.hash with Hash.fast using xxhash3-xxh64

---
 packages/opencode/src/acp/agent.ts         | 3 ++-
 packages/opencode/src/provider/provider.ts | 7 ++++---
 packages/opencode/src/util/hash.ts         | 7 +++++++
 3 files changed, 13 insertions(+), 4 deletions(-)
 create mode 100644 packages/opencode/src/util/hash.ts

diff --git a/packages/opencode/src/acp/agent.ts b/packages/opencode/src/acp/agent.ts
index 8b338f1b5..d518dd12a 100644
--- a/packages/opencode/src/acp/agent.ts
+++ b/packages/opencode/src/acp/agent.ts
@@ -31,6 +31,7 @@ import {
 import { Log } from "../util/log"
 import { pathToFileURL } from "bun"
 import { Filesystem } from "../util/filesystem"
+import { Hash } from "../util/hash"
 import { ACPSessionManager } from "./session"
 import type { ACPConfig } from "./types"
 import { Provider } from "../provider/provider"
@@ -281,7 +282,7 @@ export namespace ACP {
                 const output = this.bashOutput(part)
                 const content: ToolCallContent[] = []
                 if (output) {
-                  const hash = String(Bun.hash(output))
+                  const hash = Hash.fast(output)
                   if (part.tool === "bash") {
                     if (this.bashSnapshots.get(part.callID) === hash) {
                       await this.connection
diff --git a/packages/opencode/src/provider/provider.ts b/packages/opencode/src/provider/provider.ts
index 817038365..b4836ae04 100644
--- a/packages/opencode/src/provider/provider.ts
+++ b/packages/opencode/src/provider/provider.ts
@@ -6,9 +6,10 @@ import { mapValues, mergeDeep, omit, pickBy, sortBy } from "remeda"
 import { NoSuchModelError, type Provider as SDK } from "ai"
 import { Log } from "../util/log"
 import { BunProc } from "../bun"
+import { Hash } from "../util/hash"
 import { Plugin } from "../plugin"
-import { ModelsDev } from "./models"
 import { NamedError } from "@opencode-ai/util/error"
+import { ModelsDev } from "./models"
 import { Auth } from "../auth"
 import { Env } from "../env"
 import { Instance } from "../project/instance"
@@ -795,7 +796,7 @@ export namespace Provider {
     const modelLoaders: {
       [providerID: string]: CustomModelLoader
     } = {}
-    const sdk = new Map<number, SDK>()
+    const sdk = new Map<string, SDK>()
 
     log.info("init")
 
@@ -1085,7 +1086,7 @@ export namespace Provider {
           ...model.headers,
         }
 
-      const key = Bun.hash.xxHash32(JSON.stringify({ providerID: model.providerID, npm: model.api.npm, options }))
+      const key = Hash.fast(JSON.stringify({ providerID: model.providerID, npm: model.api.npm, options }))
       const existing = s.sdk.get(key)
       if (existing) return existing
 
diff --git a/packages/opencode/src/util/hash.ts b/packages/opencode/src/util/hash.ts
new file mode 100644
index 000000000..648148f93
--- /dev/null
+++ b/packages/opencode/src/util/hash.ts
@@ -0,0 +1,7 @@
+import { createHash } from "crypto"
+
+export namespace Hash {
+  export function fast(input: string | Buffer): string {
+    return createHash("xxhash3-xxh64").update(input).digest("hex")
+  }
+}