refactor(core): remove memory tool instructions from Gemini 3 prompt (#18559)

packages/core/src/prompts/snippets.ts

@@ -12,7 +12,6 @@ import {
   EXIT_PLAN_MODE_TOOL_NAME,
   GLOB_TOOL_NAME,
   GREP_TOOL_NAME,
-  MEMORY_TOOL_NAME,
   READ_FILE_TOOL_NAME,
   SHELL_TOOL_NAME,
   WRITE_FILE_TOOL_NAME,
@@ -248,7 +247,7 @@ ${shellEfficiencyGuidelines(options.enableShellEfficiency)}
 
 ## Tool Usage
 - **Parallelism:** Execute multiple independent tool calls in parallel when feasible (i.e. searching the codebase).
-- **Command Execution:** Use the '${SHELL_TOOL_NAME}' tool for running shell commands, remembering the safety rule to explain modifying commands first.${toolUsageInteractive(options.interactive)}${toolUsageRememberingFacts(options)}
+- **Command Execution:** Use the '${SHELL_TOOL_NAME}' tool for running shell commands, remembering the safety rule to explain modifying commands first.${toolUsageInteractive(options.interactive)}
 - **Confirmation Protocol:** If a tool call is declined or cancelled, respect the decision immediately. Do not re-attempt the action or "negotiate" for the same tool call unless the user explicitly directs you to. Offer an alternative technical path if possible.
 
 ## Interaction Details
@@ -519,17 +518,6 @@ function toolUsageInteractive(interactive: boolean): string {
 - **Interactive Commands:** Always prefer non-interactive commands (e.g., using 'run once' or 'CI' flags for test runners to avoid persistent watch modes or 'git --no-pager') unless a persistent process is specifically required; however, some commands are only interactive and expect user input during their execution (e.g. ssh, vim).`;
 }
 
-function toolUsageRememberingFacts(
-  options: OperationalGuidelinesOptions,
-): string {
-  const base = `
-- **Memory Tool:** Use \`${MEMORY_TOOL_NAME}\` only for global user preferences, personal facts, or high-level information that applies across all sessions. Never save workspace-specific context, local file paths, or transient session state. Do not use memory to store summaries of code changes, bug fixes, or findings discovered during a task; this tool is for persistent user-related information only.`;
-  const suffix = options.interactive
-    ? ' If unsure whether a fact is worth remembering globally, ask the user.'
-    : '';
-  return base + suffix;
-}
-
 function gitRepoKeepUserInformed(interactive: boolean): string {
   return interactive
     ? `