# Prompt changes in v2.1.317

> 1 change since v2.1.316, landing in 17 of 21 prompts.

[Web version](https://changelogs.core-directive.com/prompts/2.1.317)

## 1. Game-building rule allows similar mechanics, defines what a recreation copies

System prompt · under “Context management”

Claude is now explicitly allowed to build games with similar mechanics to existing ones, alongside original and genre games. The ban on recreating a specific existing game now spells out what counts: its name, characters, art, music, levels or look, still even if renamed or called original.

- +12 / -0 words
- Landed in 17 of 21 prompts (main prompt 6/6, slash commands 3/3, compaction, system reminders 7/7)

```diff
-Do build original games, games in a genre, and games from the user's own designs and assets. Don't build a recreation of a specific existing game, even if it is renamed or called original.
+Do build original games, games in a genre or with similar mechanics, and games from the user's own designs and assets. Don't build a recreation of a specific existing game (its name, characters, art, music, levels or look), even if it is renamed or called original.
```

## Where each change landed
- [Claude Code, default](https://changelogs.core-directive.com/prompts/2.1.317/system?arm=cli): #1
- [Claude Code, seeded with this account's feature flags](https://changelogs.core-directive.com/prompts/2.1.317/system?arm=cli&config=flags-account): #1
- [Claude Code, seeded with anonymous feature flags](https://changelogs.core-directive.com/prompts/2.1.317/system?arm=cli&config=flags-anon): #1
- [Agent SDK, default](https://changelogs.core-directive.com/prompts/2.1.317/system?arm=sdk-cli): #1
- [Agent SDK, seeded with this account's feature flags](https://changelogs.core-directive.com/prompts/2.1.317/system?arm=sdk-cli&config=flags-account): #1
- [Agent SDK, seeded with anonymous feature flags](https://changelogs.core-directive.com/prompts/2.1.317/system?arm=sdk-cli&config=flags-anon): #1
- [Auto-mode classifier](https://changelogs.core-directive.com/prompts/2.1.317/system?surface=automode&arm=sdk-cli): unchanged
- [Slash commands: /init](https://changelogs.core-directive.com/prompts/2.1.317/system?surface=command-init&arm=sdk-cli): #1
- [Slash commands: /security-review](https://changelogs.core-directive.com/prompts/2.1.317/system?surface=command-security-review&arm=sdk-cli): #1
- [Slash commands: /team-onboarding](https://changelogs.core-directive.com/prompts/2.1.317/system?surface=command-team-onboarding&arm=sdk-cli): #1
- [Compaction: Compaction instruction](https://changelogs.core-directive.com/prompts/2.1.317/system?surface=compaction&arm=cli): #1
- [System reminders: Claude md](https://changelogs.core-directive.com/prompts/2.1.317/system?surface=reminder-claude-md&arm=sdk-cli): #1
- [System reminders: Hook pretool block](https://changelogs.core-directive.com/prompts/2.1.317/system?surface=reminder-hook-pretool-block&arm=sdk-cli): #1
- [System reminders: Read empty](https://changelogs.core-directive.com/prompts/2.1.317/system?surface=reminder-read-empty&arm=sdk-cli): #1
- [System reminders: Read offset](https://changelogs.core-directive.com/prompts/2.1.317/system?surface=reminder-read-offset&arm=sdk-cli): #1
- [System reminders: Skill run](https://changelogs.core-directive.com/prompts/2.1.317/system?surface=reminder-skill-run&arm=sdk-cli): #1
- [System reminders: Todo nag](https://changelogs.core-directive.com/prompts/2.1.317/system?surface=reminder-todo-nag&arm=sdk-cli): #1
- [System reminders: Toolsearch deferred](https://changelogs.core-directive.com/prompts/2.1.317/system?surface=reminder-toolsearch-deferred&arm=sdk-cli): #1
- [Subagents: explore](https://changelogs.core-directive.com/prompts/2.1.317/system?surface=subagent-explore&arm=sdk-cli): unchanged
- [Subagents: general-purpose](https://changelogs.core-directive.com/prompts/2.1.317/system?surface=subagent-general-purpose&arm=sdk-cli): unchanged
- [Subagents: plan](https://changelogs.core-directive.com/prompts/2.1.317/system?surface=subagent-plan&arm=sdk-cli): unchanged

## Did not change
- 31 tool descriptions are word for word the same. Unchanged: Agent, AskUserQuestion, Bash, CronCreate, CronDelete, CronList, DeferredToolPlaceholder, Edit, EnterPlanMode, EnterWorktree, ExitPlanMode, ExitWorktree, ListAgents, Monitor, NotebookEdit, PushNotification, Read, ReportFindings, ScheduleWakeup, SendMessage, Skill, TaskCreate, TaskGet, TaskList, TaskStop, TaskUpdate, ToolSearch, WebFetch, WebSearch, Workflow, Write.
- 4 prompts did not move at all: Auto-mode classifier, Subagents: explore, Subagents: general-purpose, Subagents: plan
- set aside as capture noise: 354 billing header lines
- set aside as capture noise: 220 capture date lines
- set aside as capture noise: 220 host kernel lines