Tutorial - How to make AI character in Antigravity ?

[alongcaca]

This article is based on personal experience and may not be applicable to all cases.
i use Antigravity by Google.

- Use the Claude Opus 4.5 model for thinking, or Gemini 3.0 Pro High for coding.
My approach to the problem:
Step 1: Ask the AI ​​to create a template file containing the information needed to generate a strategy based on a 4-tier AI strategy framework. --> using Opus 4.5

Step 2: Provide all available character files and ask the AI ​​what it needs to do and what information it needs to provide to fill in the template file. --> Using the Opus 4.5 model

At this point, AI reports will be generated. Just click OK, run the program, and tell it to fill in what it can. The missing parts will be filled manually by testing on the engine (usually, AI can't do things like this move, so it's used for anti-air, poke, or teleportation).

Step 3: After gathering all the information from the template file, throw in all the new template files (.md files, .csv files). It will process them to create a new cmd file.

Step 4: Refine by opening the ikemen, reviewing and repeating the process. Identify any unsuitable points and add further requirements for adjustments.

For example: the combo should start with state xxx, with confirmation of hitting the opponent, the next state yyy, and end with state zzz if the opponent's damage is reduced to fff HP, with a 60% chance of occurring.

Repeat dozens of times with different conditions.

Because there are many types of systems, this template file was created after analyzing the Garuda character. Therefore, it may require some different steps to better analyze the input and produce a better template file for each character system in different games.

Cost: It is recommended to use a Google AI Ultra account for the best results and to save time.

Creating an AI patch this way may cost around 100 USD per character. if you do from 0

I've listed the files, the prompt, and provided a list of sample template files to download below.


      Posted: February 11, 2026, 05:03:23 AM
Download template
https://drive.google.com/file/d/1dALnmIO5J9Sh4RUZR7-iFQy_FmmkyYhP/view?usp=sharing

In step 2:Provide all available character files and ask the AI ​​what it needs to do and what information it needs to provide to fill in the template file[
1st Prompt

Code Select Expand

1/ You are a programmer specializing in writing AI strategies for the Ikemen Go engine, an engine used to create fighting games.

2/ I have a character named Yang Fei with the following files:
hypers.st
normals.st
special.st
Yang Fei.def
yang-fei.air
yang-fei.cmd
yang-fei.cns

3/ I have a template file to prepare for creating the character's AI, including:
ai_character_prompt_template.md

CancelRoutes.csv
ComboPriority.csv
FrameData.csv
HitboxData.csv
StateData2.csv
These files are not Yang Fei's data, they are just samples.
4/ Extract data from the states and files in section 2 to serve section 3. Before filling in the data, does the data in section 2 have enough information to identify and extract it for section 3? What additional information is needed for the missing items? How can that information be obtained?

      Posted: February 11, 2026, 06:15:24 AM
Some sections require manual testing and user input, such as the AIUsage and Priority columns in the StateData.cvs file shown in the attached image.


I've attached a list of phrases and tags that can be combined so you can choose the most suitable ones for your specific situation.

1) AIUsage — Types of Usage that can be filled in

This is a behavior tag for the AI ​​filter to move according to the situation.

You can use a single tag or multiple tags (separated by |).

1.1 Neutral / Footsies

Tag	Meaning
Neutral	Attack used when standing neutral
Poke	Long-range poke attack
LongPoke	Long-range poke attack
FastPoke	Fast poke attack
WhiffPunish	Punish when opponent misses
SpaceControl	Distance control
KeepOut	Pushes opponent away

1.2 Pressure / Offense

Tag	Meaning
Pressure	Blockstring attack
Blockstring	Safe block chain
FrameTrap	Frame trap
GuardBreak	Breaks guard
ChipDamage	Damages health when blocked
Mixup	Mix high/low/left/right
Reset	Reset combo

1.3 Combo

Tag	Meaning
ComboStarter	Combo start
ComboFiller	Mid-combo
ComboEnder	Combo ender
Launcher	Knock-up
Juggle	Attack from the air
OTG	Attack when lying on the ground
WallBounce	Wall bounce
GroundBounce	Ground bounce

1.4 Punish

Tag	Meaning
Punish	General Punishment
BlockPunish	Punish when blocked
WhiffPunish	Punish missed attack
ReversalPunish	Punish reversal

1.5 Anti-Air

Tag	Meaning
AntiAir	Air attack
AirToAir	Aerial combat
AirCounter	Counter jump-in

1.6 Defensive

Tag	Meaning
Reversal	Invulnerable counter-attack
DP	Dragon Punch
Counter	Parry / counter move
GuardCancel	Cancel when blocked
Pushback	Push opponent

      Posted: February 11, 2026, 06:23:35 AM

1.7 Mobility / Utility

Tag	Meaning
Approach	Approach
DashAttack	Attack when dashing
Retreat	Retreat
Escape	Escape pressure
Teleport	Teleport
Mobility	Special move

1.8 Projectile / Zoning

Tag	Meaning
Projectile	Fire projectiles
Zoning	Maintain distance
AntiProjectile	Destroy projectiles
Trap	Set traps

1.9 Throw / Grab

Tag	Meaning
Throw	Normal throw
CommandGrab	Command throw
AirThrow	Air throw
TickThrow	Throw after block

1.10 Super / Install

Tag	Meaning
Super	Super move
Level1 / 2/3	Super Hierarchy
Install	Transformation
Finisher	Finishing Move

1.11 Special AI Logic Tags

Used for Advanced AI:

Tag	Meaning
SafeOnBlock	Safe when blocking
PlusOnBlock	Frame gain
ArmorBreak	Armor penetration
Invincible	Has invulnerability
Meaty	Suppresses wakeup
Okizeme	Pressure when opponent falls

2) Example of filling in AIUsage
5LP → Neutral|FastPoke|Pressure
2MK → LowPoke|WhiffPunish
623HP → Reversal|AntiAir|Invincible
236P → Projectile|Zoning
5HP → Punish|ComboStarter

     Posted: February 11, 2026, 06:42:55 AM
3) Priority — AI Priority

Priority = weight when multiple moves are valid.

Usually uses an integer scale.
3.1 Common Standard Scale

Priority	Meaning
1	Very Low
2	Low
3	Medium
4	High
5	Very High
6–10	Special Priority

3.2 Practical Mapping

Neutral

Move Priority Light poke 4 Heavy poke 2 Sweep 1 Punish Move Priority Optimal punish 5 Fast punish 4 Super punish 6 Combo Move Priority Starter 5 Filler 3 Ender 4

[inktrebuchet]

This looks like it would be a waste of time. Could you show anything the AI actually wrote?

[alongcaca]

This looks like it would be a waste of time. Could you show anything the AI actually wrote?

Currently, no, because most of it is AI synthesized from humans, but the future is uncertain.
If you want to ask about the results of applying AI to improve character AI, you can refer to this video as an example.
https://www.youtube.com/watch?v=viiiqFNhfzI