Feat: add a new agent: Google Anti Gravity by TCoherence · Pull Request #1220 · github/spec-kit

TCoherence · 2025-11-19T21:11:53Z

Background

Recently Google just release their new AI IDE - Anti Gravity with Gemini 3.0 Pro! I noticed that we already have 2 threads talking about this #1213 and #1217
So this is the PR to officially support this!

AI disclosure

This code is mainly done by using Anti Gravity with Gemini 3.0 Pro, with some manual fixes

Test Screenshot

Used .github/workflows/scripts/create-release-packages.sh script to generate a local release package and manully copied it to local branch to test it out, the result is as follows:

TCoherence · 2025-11-19T21:12:43Z

Hey @localden Just added another new agent for Anti Gravity. Please let me know if it looks good to you

sakshamnanda · 2025-11-19T22:31:25Z

I tried your PR, the specify init doesn't work on the new antigravity update, as agy command is not decoupled anymore to outside terminals.

TCoherence · 2025-11-20T00:53:23Z

I tried your PR, the specify init doesn't work on the new antigravity update, as agy command is not decoupled anymore to outside terminals.

@sakshamnanda The specify init command only pulls packages release officially. I actually have another separate PR to add a separate option "--template-file" in the "specify-cli" so that you can init from a specific package. Check this out: #1057

sakshamnanda · 2025-11-20T00:57:01Z

I tried your PR, the specify init doesn't work on the new antigravity update, as agy command is not decoupled anymore to outside terminals.

@sakshamnanda The specify init command only pulls packages release officially. I actually have another separate PR to add a separate option "--template-file" in the "specify-cli" so that you can init from a specific package. Check this out: #1057

I used this command to use your branch to initialise, and that's how I got the error.
In the official specify the agy is not even in the packages.
uvx --from "git+https://github.com/TCoherence/github-spec-kit@new_agent/antigravity" specify init .

kvcrajan · 2025-11-20T01:01:42Z

I appreciate for the quick turn-around, however I would like have this change merged with README update and released as template just like for other IDEs. Hope to see that soon. Great Job and Thank you again!

TCoherence · 2025-11-20T01:14:42Z

I tried your PR, the specify init doesn't work on the new antigravity update, as agy command is not decoupled anymore to outside terminals.

@sakshamnanda The specify init command only pulls packages release officially. I actually have another separate PR to add a separate option "--template-file" in the "specify-cli" so that you can init from a specific package. Check this out: #1057

I used this command to use your branch to initialise, and that's how I got the error. In the official specify the agy is not even in the packages. uvx --from "git+https://github.com/TCoherence/github-spec-kit@new_agent/antigravity" specify init .

@sakshamnanda For current specify command, it's forced to pull packages from the offical release, you can check it out in __init__.py. Here is a quick screenshot from Gemini's response:

localden · 2025-12-02T19:07:08Z

@TCoherence can you please resolve the conflicts before we can merge this? Also, seems like you're using the agy acronym - is that something Google uses for Antigravity? I would rather use the full name.

TCoherence · 2025-12-03T04:17:53Z

@TCoherence can you please resolve the conflicts before we can merge this? Also, seems like you're using the agy acronym - is that something Google uses for Antigravity? I would rather use the full name.

@localden Sure will do later this week when free.
For agy, i use it because agy is the command will be installed by default for AntiGravity

TCoherence · 2025-12-08T08:14:18Z

Hey @localden Just fixed the conflicts and please let me know if it looks good to you. 🤜

EpicHigh · 2025-12-13T13:59:13Z

Please help merge this one @localden.

xuan2261 · 2025-12-13T17:21:42Z

Please help merge this one @localden.

TCoherence · 2025-12-13T22:22:37Z

Hey @localden Can you take a quick look at this PR? Thanks!

cristianuibar · 2025-12-14T07:42:22Z

awaiting for this as well

crokobit · 2025-12-17T02:37:46Z

looking forward to this

AndyZHENG0715 · 2025-12-18T07:05:30Z

Looking forward to supporting Antigravity

vincentlkl · 2025-12-24T15:39:49Z

looking forward to it to be merged

suchithm1999 · 2025-12-25T07:09:29Z

@TCoherence Hey There, is there a guild on how to use this till this gets merged?

dougcooper · 2025-12-25T11:57:05Z

My Christmas wish was for this story to get merged 😥

suchithm1999 · 2025-12-25T12:00:52Z

Hey Guys, I found a way to make this spec-kit work with antigravity, download the release template for gemini-sh, rename the workflows folder as below (make sure you change the extension to .md)

Edit: built the static feedpost app in an hour using spec-kit and antigravity:
github: https://github.com/suchithm1999/PostShare
deployed URL: https://post-share-eight.vercel.app/

Max-Levitskiy · 2025-12-29T12:05:26Z

Let's finally merge it. ;)

black1good · 2026-01-02T23:02:59Z

@localden Grant us the ability Master #1220 😀

black1good · 2026-01-02T23:28:05Z

@TCoherence Hi, I just updated your Antigravitiy thread, but there are no resources available (No matching resource found for agy (expected template: spec-kit-template-agy-sh). Could you please update it?

hb2708 · 2026-01-06T08:49:12Z

Came across this , looking forward to see this merged

TCoherence · 2026-01-11T01:17:05Z

Hey @localden Do you get a chance to take a look at this one?

TCoherence · 2026-01-11T01:18:41Z

@TCoherence Hi, I just updated your Antigravitiy thread, but there are no resources available (No matching resource found for agy (expected template: spec-kit-template-agy-sh). Could you please update it?

@black1good You can actually build the resource template on the branch but once this PR is merged we can release a new package for antigravity

hb2708 · 2026-01-15T05:33:58Z

hey @localden any plans to get this merged?

Copilot

Pull request overview

Adds support for a new AI agent key (agy) intended for Google Antigravity, wiring it through the CLI, agent-context update scripts, and release packaging so users can scaffold templates for that agent.

Changes:

Add agy to the CLI agent configuration and specify init --ai help text.
Extend bash/PowerShell agent-context update scripts to recognize/update the Antigravity rules file.
Include agy templates in release package generation and GitHub release artifact lists; document the agent in the README.

Reviewed changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
src/specify_cli/init.py	Registers the new `agy` agent in `AGENT_CONFIG` and exposes it via `--ai` help text.
scripts/powershell/update-agent-context.ps1	Adds `agy` to supported agent types and updates/creates the Antigravity context rules file.
scripts/bash/update-agent-context.sh	Adds `agy` support and file path handling for the Antigravity context rules file.
README.md	Documents Antigravity in supported agents and in the `--ai` option list.
.github/workflows/scripts/create-release-packages.sh	Generates `agy` release packages and includes `agy` in the default agent build list.
.github/workflows/scripts/create-github-release.sh	Uploads `agy` template zip files as part of GitHub release creation.

Comments suppressed due to low confidence (1)

scripts/bash/update-agent-context.sh:756

print_summary’s usage string is missing some supported agent types (e.g., roo, amp) even though they are handled by update_specific_agent and mentioned in other help/error strings. Please make the usage list consistent with the actual supported agent keys.

    log_info "Usage: $0 [claude|gemini|copilot|cursor-agent|qwen|opencode|codex|windsurf|kilocode|auggie|codebuddy|shai|q|agy|bob|qoder]"

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Copilot · 2026-02-06T18:50:51Z

src/specify_cli/__init__.py

 def init(
    project_name: str = typer.Argument(None, help="Name for your new project directory (optional if using --here, or use '.' for current directory)"),
-    ai_assistant: str = typer.Option(None, "--ai", help="AI assistant to use: claude, gemini, copilot, cursor-agent, qwen, opencode, codex, windsurf, kilocode, auggie, codebuddy, amp, shai, q, bob, or qoder "),
+    ai_assistant: str = typer.Option(None, "--ai", help="AI assistant to use: claude, gemini, copilot, cursor-agent, qwen, opencode, codex, windsurf, kilocode, auggie, codebuddy, amp, shai, q, agy, bob, or qoder "),


The --ai help text is a hard-coded list (and currently has a trailing space at the end). This is easy to get out of sync with AGENT_CONFIG. Consider generating this string from AGENT_CONFIG.keys() (and trimming the trailing whitespace) so adding/removing agents only needs to happen in one place.

Suggested change

ai_assistant: str = typer.Option(None, "--ai", help="AI assistant to use: claude, gemini, copilot, cursor-agent, qwen, opencode, codex, windsurf, kilocode, auggie, codebuddy, amp, shai, q, agy, bob, or qoder "),

ai_assistant: str = typer.Option(None, "--ai", help=f"AI assistant to use: {', '.join(sorted(AGENT_CONFIG.keys()))}"),

Copilot · 2026-02-06T18:50:51Z

scripts/bash/update-agent-context.sh

 #
 # Usage: ./update-agent-context.sh [agent_type]
-# Agent types: claude|gemini|copilot|cursor-agent|qwen|opencode|codex|windsurf|kilocode|auggie|shai|q|bob|qoder
+# Agent types: claude|gemini|copilot|cursor-agent|qwen|opencode|codex|windsurf|kilocode|auggie|shai|q|agy|bob|qoder


Copilot · 2026-02-06T18:50:52Z

src/specify_cli/__init__.py

+        "install_url": None,
+        "requires_cli": True,


For the new agy agent, requires_cli is set to True but install_url is None. If agy is not on PATH, specify init will fail and the error panel will display “Install from: None”. Either provide a real install URL and ensure the binary name to check is correct, or mark this agent as IDE-based (requires_cli=False) like other IDE agents (Cursor/Windsurf/etc.).

Suggested change

"install_url": None,

"requires_cli": True,

"install_url": None, # IDE-based

"requires_cli": False,

….0.98) Key upstream changes absorbed: - Modular extension system (PR github#1551): plugin architecture with YAML manifests, extension catalog, hook system, CLI management commands - Constitution preservation on reinit (PR github#1553): template moved to templates/constitution-template.md, user customizations preserved - .specify.specify path bug fix (PR github#1588): double-nesting resolved - Google Anti Gravity agent support (PR github#1220): new agy agent in release - Stale workflow (PR github#1594): auto-close inactive issues after 180 days - Dependabot config (PR github#1622): automated pip and Actions updates - Markdownlint fixes (PR github#1571), plan template typo (PR github#1446) - README maintainers section removed (PR github#1618) Conflict resolutions: - pyproject.toml: kept our version (0.0.20.post1) over upstream 0.1.0 - plan-template.md: kept /sp.plan prefix over upstream /speckit.plan - create-release-packages.sh: merged agy agent + kept our generate_agent_rules; updated constitutionplus/command-rules paths from memory/ to templates/ to match upstream rename - README.md: kept our SpecifyPlus content, dropped upstream maintainers section (already removed upstream), preserved contributing section - templates/command-rules.md, templates/constitutionplus.md: accepted memory/ → templates/ relocation matching upstream convention Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

TCoherence added 2 commits November 19, 2025 12:11

Add support for Antigravity (agy) agent

6a42867

fix a few things after gemini code update

1747435

TCoherence requested a review from localden as a code owner November 19, 2025 21:11

This was referenced Nov 19, 2025

Templates for Google Antigravity IDE #1217

Closed

Support Antigravity #1213

Closed

localden self-assigned this Dec 2, 2025

localden added merge-candidate Reasonable change that is going to be merged after a review. new-agent labels Dec 2, 2025

localden mentioned this pull request Dec 4, 2025

spec-kit for Antigravity #1270

Closed

TCoherence added 2 commits December 8, 2025 00:08

Merge remote-tracking branch 'upstream/main' into new_agent/antigravity

5ee3178

Fix missed merge conflicts

c46c3ee

Max-Levitskiy mentioned this pull request Dec 10, 2025

feat: Add Antigravity IDE agent support across scripts, CLI, document… #1291

Open

Gitchegumi mentioned this pull request Dec 18, 2025

Request: Antigravity template (or guidance) #1296

Open

serhiishtokal mentioned this pull request Dec 21, 2025

feat: Add Antigravity agent support #1368

Open

dhilipkumars mentioned this pull request Jan 3, 2026

Add support for google.antigravity #1413

Closed

mnriem requested review from Copilot and removed request for localden February 6, 2026 18:47

mnriem assigned mnriem and unassigned localden Feb 6, 2026

Copilot started reviewing on behalf of mnriem February 6, 2026 18:47 View session

Copilot AI reviewed Feb 6, 2026

View reviewed changes

mnriem added 2 commits February 12, 2026 12:17

As PR states it is IDE integration setting requires_cli to 'False'

e02a531

Merge branch 'main' into new_agent/antigravity

8d1fba3

mnriem merged commit 76cca34 into github:main Feb 12, 2026
1 check passed

dhilipkumars mentioned this pull request Feb 13, 2026

Support Antigravity #1598

Closed

mjunaidca mentioned this pull request Feb 19, 2026

Sync upstream github/spec-kit (v0.0.91–v0.0.98) panaversity/spec-kit-plus#43

Open

6 tasks

	ai_assistant: str = typer.Option(None, "--ai", help="AI assistant to use: claude, gemini, copilot, cursor-agent, qwen, opencode, codex, windsurf, kilocode, auggie, codebuddy, amp, shai, q, agy, bob, or qoder "),
	ai_assistant: str = typer.Option(None, "--ai", help=f"AI assistant to use: {', '.join(sorted(AGENT_CONFIG.keys()))}"),

	# Agent types: claude\|gemini\|copilot\|cursor-agent\|qwen\|opencode\|codex\|windsurf\|kilocode\|auggie\|shai\|q\|agy\|bob\|qoder
	# Agent types: claude\|gemini\|copilot\|cursor-agent\|qwen\|opencode\|codex\|windsurf\|kilocode\|auggie\|shai\|q\|agy\|bob\|qoder\|roo\|codebuddy\|amp

Conversation

TCoherence commented Nov 19, 2025

Background

AI disclosure

Test Screenshot

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sakshamnanda commented Nov 19, 2025 •

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