docs: Add Antigravity/Gemini as a supported agent for Seqera AI skills

platform-cloud/docs/seqera-ai/index.md

@@ -85,6 +85,7 @@ Organize a workspace into projects by applying Seqera Platform labels prefixed w
 - [Working with Claude Code](./skill-claude-code.md): Install Seqera AI as a skill for Claude Code
 - [Working with Codex](./skill-codex.md): Install Seqera AI as a skill for Codex
 - [Working with GitHub Copilot](./skill-github-copilot.md): Install Seqera AI as a skill for GitHub Copilot
+- [Working with Antigravity/Gemini](./skill-antigravity.md): Install Seqera AI as a skill for Antigravity/Gemini
 - [Working with other coding agents](./skill-other-agents.md): Install Seqera AI for other coding agents
 - [Code intelligence](./nextflow-lsp.md): Language-server support in Seqera AI
 - [Use cases](./use-cases.md): Seqera AI CLI use cases

platform-cloud/docs/seqera-ai/skill-antigravity.md

@@ -0,0 +1,153 @@
+---
+title: "Working with Antigravity/Gemini"
+description: "Install and maintain the Seqera AI skill for Google's Antigravity/Gemini IDE"
+date created: "2026-04-29"
+tags: [seqera-ai, cli, skills, antigravity, gemini]
+---
+
+:::note
+Seqera Cloud users receive $20 in free credits to get started with Seqera AI. [Contact us](https://seqera.io/platform/seqera-ai/request-credits/) for additional credits.
+:::
+
+The `seqera skill` command installs a skill file that enables [Antigravity/Gemini](https://blog.google/technology/google-deepmind/gemini-model-thinking-updates-march-2025/) to use Seqera AI as a subagent. Once installed, Antigravity can invoke Seqera AI directly to manage workflows, build containers, query nf-core modules, and more without leaving your environment.
+
+### Antigravity/Gemini skill format
+
+Antigravity/Gemini discovers skills from the `.agents/skills/` directory at the repository root. Each skill is a folder containing a `SKILL.md` file with YAML frontmatter (name, description) and detailed instructions.
+
+| Agent | Format |
+|-------|--------|
+| [Antigravity/Gemini](https://blog.google/technology/google-deepmind/) | `.agents/skills/` |
+
+### `seqera skill install`
+
+Install to the Antigravity skill directory:
+
+```bash
+seqera skill install --path .agents/skills/seqera-ai-subagent/
+```
+
+Install into the current repository root:
+
+```bash
+seqera skill install --local
+```
+
+Or install to your home directory:
+
+```bash
+seqera skill install --global
+```
+
+You can also auto-detect and update an existing installation:
+
+```bash
+seqera skill install --detect
+```
+
+:::note
+If you encounter a `ENOENT: no such file or directory, scandir '/$bunfs/root/content/seqera'` error with `seqera skill install`, you can manually create the skill file. See [Manual installation](#manual-installation) below.
+:::
+
+### Manual installation
+
+If the automated installer does not support your agent platform, you can manually create the skill file:
+
+1. Create the skill directory:
+    ```bash
+    mkdir -p .agents/skills/seqera-ai-subagent/
+    ```
+
+2. Create `.agents/skills/seqera-ai-subagent/SKILL.md` with the following content:
+    ```markdown
+    ---
+    name: seqera-ai-subagent
+    description: Invokes the Seqera AI CLI as a domain-expert subagent for Nextflow
+    pipeline development, nf-core module management, Seqera Platform workspace
+    operations, and Wave container builds.
+    ---
+
+    # Seqera AI Subagent
+
+    When the user asks about Nextflow pipelines, nf-core modules, Seqera Platform,
+    or Wave containers, invoke the Seqera AI CLI:
+
+    seqera ai --headless --approval-mode basic "<query>" 2>&1
+    ```
+
+3. Verify the installation:
+    ```bash
+    seqera skill check
+    ```
+
+### Invocation patterns
+
+Antigravity invokes Seqera AI dynamically via shell commands rather than static context injection. The recommended patterns are:
+
+| Pattern | Command | Use case |
+|---------|---------|----------|
+| Headless query | `seqera ai --headless --approval-mode basic "<query>"` | Read-only questions, analysis |
+| Sub-agent mode | `seqera ai --sub-agent --approval-mode basic "<query>"` | Structured JSONL output |
+| Goal mode | `seqera ai --headless --approval-mode full "/goal <task>"` | Multi-step autonomous work |
+| Module QA review | `seqera ai --headless --approval-mode basic "Review modules/nf-core/<module>/main.nf for correctness"` | Pre-push nf-core module validation |
+
+### Validated use case: nf-core module QA
+
+Antigravity uses Seqera AI as a domain-expert QA gate before pushing nf-core module PRs. In [PR #11377](https://github.com/nf-core/modules/pull/11377) (emmtyper), Seqera AI caught that `emmtyper --version | sed` was fragile across Docker/Conda environments due to Click version differences, and recommended using `python -c "import emmtyper; print(emmtyper.__version__)"` instead.
+
+```bash
+seqera ai --headless --approval-mode basic \
+  "Review modules/nf-core/emmtyper/main.nf for topic channel, stub, and eval correctness" 2>&1
+```
+
+This pattern complements `nf-core modules lint` by catching semantic issues that static linting misses.
+
+### Usage
+
+```bash
+seqera skill install [OPTIONS]
+```
+
+### Options
+
+| Option | Short | Description |
+|--------|-------|-------------|
+| `--local` | `-l` | Install to repo root |
+| `--path <PATH>` | `-p` | Install to a custom path (relative or absolute) |
+| `--global` | `-g` | Install to home directory |
+| `--detect` | `-d` | Auto-detect an existing installation and update it |
+
+### `seqera skill check`
+
+Verify that your installed skill matches your current CLI version:
+
+```bash
+seqera skill check
+```
+
+Update automatically if needed:
+
+```bash
+seqera skill check --update
+```
+
+### Usage
+
+```bash
+seqera skill check [OPTIONS]
+```
+
+### Options
+
+| Option | Short | Description |
+|--------|-------|-------------|
+| `--update` | `-u` | Automatically update outdated skills |
+| `--global` | | Check only global installations |
+| `--local` | | Check only local (repository) installations |
+
+### Learn more
+
+- [Skills](./skills.md): Discover, create, and install skills
+- [Use cases](./use-cases.md): Seqera AI CLI use cases
+- [Code intelligence](./nextflow-lsp.md): Language-aware coding support
+- [Installation](./installation.md): Detailed installation instructions