Design or evaluate game story, world, characters, spaces, presence, aesthetics, and indirect control.
SkillScore82Maintained
Automatic
◆Writing & Editing pack
Last verified 8/16/2026
What it changes
Passed 18 of 22 test cases with the skill, and 13 of 22 without it.
Without skill59%
With skill82%
Checks it passed that the model alone missed
The response includes test cases inside Implementation Notes.
The response contains test cases to verify narrative state transitions.
The output includes state flags and test cases for transformation milestones.
and 5 more in the full report
8 fixed10 passed either way1 still failing3 broke
Pass-rate lift
+23 pp
Tokens
+2%
Agent turns
0%
Response time
-9%
Model gemini-3.6-flashMeasured 8/16/2026v118 of 22 cases passed with skill
Tokens, turns and time describe resource use, not a dollar price.
See it in action
One of 8 test cases the skill fixed. Same model, same prompt, with and without the skill.
1 of 8
Prompt
I am developing a sci-fi rogue-lite about a maintenance worker fixing a dying starship alongside an evolving AI companion. Please create a complete narrative system spec for my dev team. I need you to define the purpose of narrative in this game, map plot progression to player mechanics and state changes, list the fundamental world guidelines and tonal boundaries, outline character specifications including motivation and system interactions for the AI, and provide technical execution notes with state tracking flags, system triggers, and test cases.
What was checked, without and with the skill
Checked
Without skill
With skill
The response includes a Narrative Function section describing narrative purpose.
Passed
Passed
The response includes a Character Specs section detailing the AI companion's role, desire, behavior hooks, dialogue constraints, and gameplay purpose.
Passed
Passed
The response includes an Implementation Notes section containing state flags, system triggers, content data, level cues, and test cases.
Missed
Passed
case-01 · gemini-3.6-flash · 8/16/2026 · answers are capped and redacted
What's inside
The instructions your model reads when the skill loads.
SKILL.md32 linessingle file
Game Story World Character
Use this skill to make narrative and world design serve play instead of competing with it. The output should give the coding agent clear content structures, state needs, triggers, and constraints.
Source Traceability
Primary source: The Art of Game Design: A Book of Lenses, Third Edition by Jesse Schell, especially chapters 17-23 on story, indirect control, worlds, characters, spaces, presence, and aesthetics. The workflow is transformed and paraphrased.
Supporting source: MDA for separating authored mechanics from player-experienced dynamics and aesthetics.
Workflow
Define the role of story: premise, motivation, context, consequence, mystery, comedy, identity, or emotional payoff.
Align story beats with player action and system state.
Use indirect control through goals, affordances, layout, rewards, information, and character cues.
Specify world rules, character functions, spaces, mood, and aesthetic constraints.
Convert narrative intent into implementable triggers, content schema, and test cases.
Required Output
Narrative Function: why the game needs story or world detail.
Story-Gameplay Map: beats tied to player actions and system state.
World Rules: facts, boundaries, tone, and contradictions to avoid.
Character Specs: role, desire, behavior hooks, dialogue constraints, and gameplay purpose.
Implementation Notes: state flags, triggers, content data, level cues, and tests.