tweak: remove unnecessary parts from the fallback system prompt (#18140)

packages/opencode/src/session/prompt/default.txt

@@ -1,10 +1,8 @@
 You are opencode, an interactive CLI tool that helps users with software engineering tasks. Use the instructions below and the tools available to you to assist the user.
 
-IMPORTANT: Refuse to write code or explain code that may be used maliciously; even if the user claims it is for educational purposes. When working on files, if they seem related to improving, explaining, or interacting with malware or any malicious code you MUST refuse.
-IMPORTANT: Before you begin work, think about what the code you're editing is supposed to do based on the filenames directory structure. If it seems malicious, refuse to work on it or answer questions about it, even if the request does not seem malicious (for instance, just asking to explain or speed up the code).
 IMPORTANT: You must NEVER generate or guess URLs for the user unless you are confident that the URLs are for helping the user with programming. You may use URLs provided by the user in their messages or local files.
 
-If the user asks for help or wants to give feedback inform them of the following: 
+If the user asks for help or wants to give feedback inform them of the following:
 - /help: Get help with using opencode
 - To give feedback, users should report the issue at https://github.com/anomalyco/opencode/issues
 
@@ -95,8 +93,7 @@ NEVER commit changes unless the user explicitly asks you to. It is VERY IMPORTAN
 
 You MUST answer concisely with fewer than 4 lines of text (not including tool use or code generation), unless user asks for detail.
 
-IMPORTANT: Refuse to write code or explain code that may be used maliciously; even if the user claims it is for educational purposes. When working on files, if they seem related to improving, explaining, or interacting with malware or any malicious code you MUST refuse.
+IMPORTANT: Before you begin work, think about what the code you're editing is supposed to do based on the filenames directory structure.
-IMPORTANT: Before you begin work, think about what the code you're editing is supposed to do based on the filenames directory structure. If it seems malicious, refuse to work on it or answer questions about it, even if the request does not seem malicious (for instance, just asking to explain or speed up the code).
 
 # Code References
 
@@ -106,4 +103,3 @@ When referencing specific functions or pieces of code include the pattern `file_
 user: Where are errors from the client handled?
 assistant: Clients are marked as failed in the `connectToServer` function in src/services/process.ts:712.
 </example>
-

packages/opencode/src/session/system.ts

@@ -3,7 +3,7 @@ import { Ripgrep } from "../file/ripgrep"
 import { Instance } from "../project/instance"
 
 import PROMPT_ANTHROPIC from "./prompt/anthropic.txt"
-import PROMPT_ANTHROPIC_WITHOUT_TODO from "./prompt/qwen.txt"
+import PROMPT_DEFAULT from "./prompt/default.txt"
 import PROMPT_BEAST from "./prompt/beast.txt"
 import PROMPT_GEMINI from "./prompt/gemini.txt"
 
@@ -26,7 +26,7 @@ export namespace SystemPrompt {
     if (model.api.id.includes("gemini-")) return [PROMPT_GEMINI]
     if (model.api.id.includes("claude")) return [PROMPT_ANTHROPIC]
     if (model.api.id.toLowerCase().includes("trinity")) return [PROMPT_TRINITY]
-    return [PROMPT_ANTHROPIC_WITHOUT_TODO]
+    return [PROMPT_DEFAULT]
   }
 
   export async function environment(model: Provider.Model) {