Prompt changes · v2.1.317 against v2.1.316

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

Every prompt v2.1.317 sent, compared word for word with the capture before it. Each card is one edit, with every prompt it reached; the table after them shows where each one landed.

What changed 1

System prompt · under “Context management”

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

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

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

Every prompt the release sent, one row each. A number is a change from the list above; click it to jump there. Rows with more than one model string count them, because each model gets its own copy of the prompt.

Prompt	1	Status
Main prompt
Claude Code, default27 models	4/27	1 change
Claude Code, seeded with this account's feature flags27 models	4/27	1 change
Claude Code, seeded with anonymous feature flags27 models	4/27	1 change
Agent SDK, default27 models	4/27	1 change
Agent SDK, seeded with this account's feature flags27 models	4/27	1 change
Agent SDK, seeded with anonymous feature flags27 models	4/27	1 change
Auto-mode classifier
Auto-mode classifier1 model	·	unchanged
Slash commands
/init1 model	●	1 change
/security-review1 model	●	1 change
/team-onboarding1 model	●	1 change
Compaction
Compaction instruction1 model	●	1 change
System reminders
Claude md1 model	●	1 change
Hook pretool block1 model	●	1 change
Read empty1 model	●	1 change
Read offset1 model	●	1 change
Skill run1 model	●	1 change
Todo nag1 model	●	1 change
Toolsearch deferred1 model	●	1 change
Subagents
explore1 model	·	unchanged
general-purpose1 model	·	unchanged
plan1 model	·	unchanged

Did not change

31 tool descriptions are word for word the same.

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

These change on every capture by construction, so they are masked before comparing and never counted as a change.

354 billing header lines
220 capture date lines
220 host kernel lines