feat(init): add IDE restart instruction after init

Add prominent restart instruction in success message to inform users
they need to restart their IDE/coding tool for slash commands to appear.
Applies to all tools when slash commands are created or refreshed.

Also updates cli-init spec to document the restart instruction requirement.

CHANGELOG.md

@@ -1,5 +1,11 @@
 # @fission-ai/openspec
 
+## Unreleased
+
+### Minor Changes
+
+- Add Antigravity slash command support so `openspec init` can generate `.agent/workflows/openspec-*.md` files with description-only frontmatter and `openspec update` refreshes existing workflows alongside Windsurf.
+
 ## 0.15.0
 
 ### Minor Changes

README.md

@@ -102,12 +102,14 @@ These tools have built-in OpenSpec commands. Select the OpenSpec integration whe
 | **OpenCode** | `/openspec-proposal`, `/openspec-apply`, `/openspec-archive` |
 | **Kilo Code** | `/openspec-proposal.md`, `/openspec-apply.md`, `/openspec-archive.md` (`.kilocode/workflows/`) |
 | **Qoder (CLI)** | `/openspec:proposal`, `/openspec:apply`, `/openspec:archive` (`.qoder/commands/openspec/`) — see [docs](https://qoder.com/cli) |
+| **Antigravity** | `/openspec-proposal`, `/openspec-apply`, `/openspec-archive` (`.agent/workflows/`) |
 | **Windsurf** | `/openspec-proposal`, `/openspec-apply`, `/openspec-archive` (`.windsurf/workflows/`) |
 | **Codex** | `/openspec-proposal`, `/openspec-apply`, `/openspec-archive` (global: `~/.codex/prompts`, auto-installed) |
 | **GitHub Copilot** | `/openspec-proposal`, `/openspec-apply`, `/openspec-archive` (`.github/prompts/`) |
 | **Amazon Q Developer** | `@openspec-proposal`, `@openspec-apply`, `@openspec-archive` (`.amazonq/prompts/`) |
 | **Auggie (Augment CLI)** | `/openspec-proposal`, `/openspec-apply`, `/openspec-archive` (`.augment/commands/`) |
 | **Qwen Code** | `/openspec-proposal`, `/openspec-apply`, `/openspec-archive` (`.qwen/commands/`) |
+| **iFlow (iflow-cli)** | `/openspec-proposal`, `/openspec-apply`, `/openspec-archive` (`.iflow/commands/`) |
 
 
 Kilo Code discovers team workflows automatically. Save the generated files under `.kilocode/workflows/` and trigger them from the command palette with `/openspec-proposal.md`, `/openspec-apply.md`, or `/openspec-archive.md`.

openspec/changes/add-antigravity-support/proposal.md

@@ -0,0 +1,11 @@
+## Why
+Google is rolling out Antigravity, a Windsurf-derived IDE that discovers workflows from `.agent/workflows/*.md`. Today OpenSpec can only scaffold slash commands for Windsurf directories, so Antigravity users cannot run the proposal/apply/archive flows from the IDE.
+
+## What Changes
+- Add Antigravity as a selectable native tool in `openspec init` so it creates `.agent/workflows/openspec-proposal.md`, `openspec-apply.md`, and `openspec-archive.md` with YAML frontmatter containing only a `description` field plus the standard OpenSpec-managed body.
+- Ensure `openspec update` refreshes the body of any existing Antigravity workflows inside `.agent/workflows/` without creating missing files, mirroring the Windsurf behavior.
+- Share e2e/template coverage confirming the generator writes the proper directory, filename casing, and frontmatter format so Antigravity picks up the workflows.
+
+## Impact
+- Affected specs: `specs/cli-init`, `specs/cli-update`
+- Expected code: CLI init/update tool registries, slash-command templates, associated tests

openspec/changes/add-antigravity-support/specs/cli-init/spec.md

@@ -0,0 +1,9 @@
+## MODIFIED Requirements
+### Requirement: Slash Command Configuration
+The init command SHALL generate slash command files for supported editors using shared templates.
+
+#### Scenario: Generating slash commands for Antigravity
+- **WHEN** the user selects Antigravity during initialization
+- **THEN** create `.agent/workflows/openspec-proposal.md`, `.agent/workflows/openspec-apply.md`, and `.agent/workflows/openspec-archive.md`
+- **AND** ensure each file begins with YAML frontmatter that contains only a `description: <stage summary>` field followed by the shared OpenSpec workflow instructions wrapped in managed markers
+- **AND** populate the workflow body with the same proposal/apply/archive guidance used for other tools so Antigravity behaves like Windsurf while pointing to the `.agent/workflows/` directory

openspec/changes/add-antigravity-support/specs/cli-update/spec.md

@@ -0,0 +1,8 @@
+## MODIFIED Requirements
+### Requirement: Slash Command Updates
+The update command SHALL refresh existing slash command files for configured tools without creating new ones, and ensure the OpenCode archive command accepts change ID arguments.
+
+#### Scenario: Updating slash commands for Antigravity
+- **WHEN** `.agent/workflows/` contains `openspec-proposal.md`, `openspec-apply.md`, and `openspec-archive.md`
+- **THEN** refresh the OpenSpec-managed portion of each file so the workflow copy matches other tools while preserving the existing single-field `description` frontmatter
+- **AND** skip creating any missing workflow files during update, mirroring the behavior for Windsurf and other IDEs

openspec/changes/add-antigravity-support/tasks.md

@@ -0,0 +1,12 @@
+## 1. CLI init support
+- [x] 1.1 Surface Antigravity in the native-tool picker (interactive + `--tools`) so it toggles alongside other IDEs.
+- [x] 1.2 Generate `.agent/workflows/openspec-proposal.md`, `openspec-apply.md`, and `openspec-archive.md` with YAML frontmatter restricted to a single `description` field for each stage and wrap the body in OpenSpec markers.
+- [x] 1.3 Confirm workspace scaffolding covers missing directory creation and re-run scenarios so repeated init refreshes the managed block.
+
+## 2. CLI update support
+- [x] 2.1 Detect existing Antigravity workflow files during `openspec update` and refresh only the managed body, skipping creation when files are missing.
+- [x] 2.2 Ensure update logic preserves the `description` frontmatter block exactly as written by init, including case and spacing, and refreshes body templates alongside other tools.
+
+## 3. Templates and tests
+- [x] 3.1 Add shared template entries for Antigravity that reuse the Windsurf copy but target `.agent/workflows` plus the description-only frontmatter requirement.
+- [x] 3.2 Expand automated coverage (unit or integration) verifying init and update produce the expected file paths and frontmatter + body markers for Antigravity.

openspec/specs/cli-init/spec.md

@@ -76,6 +76,12 @@ The command SHALL properly configure selected AI tools with OpenSpec-specific in
 - **THEN** create or update `CLINE.md` in the project root directory (not inside openspec/)
 - **AND** populate the managed block with a short stub that points teammates to `@/openspec/AGENTS.md`
 
+#### Scenario: Configuring iFlow CLI
+
+- **WHEN** iFlow CLI is selected
+- **THEN** create or update `IFLOW.md` in the project root directory (not inside openspec/)
+- **AND** populate the managed block with a short stub that points teammates to `@/openspec/AGENTS.md`
+
 #### Scenario: Creating new CLAUDE.md
 
 - **WHEN** CLAUDE.md does not exist
@@ -118,6 +124,12 @@ The command SHALL provide clear, actionable next steps upon successful initializ
 - **WHEN** initialization completes successfully
 - **THEN** include prompt: "Please explain the OpenSpec workflow from openspec/AGENTS.md and how I should work with you on this project"
 
+#### Scenario: Displaying restart instruction
+- **WHEN** initialization completes successfully and tools were created or refreshed
+- **THEN** display a prominent restart instruction before the "Next steps" section
+- **AND** inform users that slash commands are loaded at startup
+- **AND** instruct users to restart their coding assistant to ensure /openspec commands appear
+
 ### Requirement: Exit Codes
 
 The command SHALL use consistent exit codes to indicate different failure modes.
@@ -238,6 +250,14 @@ The init command SHALL generate slash command files for supported editors using
 - **AND** wrap the OpenSpec managed markers (`<!-- OPENSPEC:START -->` / `<!-- OPENSPEC:END -->`) inside the `prompt` value so `openspec update` can safely refresh the body between markers without touching the TOML framing
 - **AND** ensure the slash-command copy matches the existing proposal/apply/archive templates used by other tools
 
+#### Scenario: Generating slash commands for iFlow CLI
+- **WHEN** the user selects iFlow CLI during initialization
+- **THEN** create `.iflow/commands/openspec-proposal.md`, `.iflow/commands/openspec-apply.md`, and `.iflow/commands/openspec-archive.md`
+- **AND** populate each file from shared templates so command text matches other tools
+- **AND** include YAML frontmatter with `name`, `id`, `category`, and `description` fields for each command
+- **AND** wrap the generated content in OpenSpec managed markers so `openspec update` can safely refresh the commands
+- **AND** each template includes instructions for the relevant OpenSpec workflow stage
+
 #### Scenario: Generating slash commands for RooCode
 - **WHEN** the user selects RooCode during initialization
 - **THEN** create `.roo/commands/openspec-proposal.md`, `.roo/commands/openspec-apply.md`, and `.roo/commands/openspec-archive.md`

openspec/specs/cli-update/spec.md

@@ -123,6 +123,13 @@ The update command SHALL refresh existing slash command files for configured too
 - **AND** replace only the content between `<!-- OPENSPEC:START -->` and `<!-- OPENSPEC:END -->` markers inside the `prompt = """` block so the TOML framing (`description`, `prompt`) stays intact
 - **AND** skip creating any missing `.toml` files during update; only pre-existing Gemini commands are refreshed
 
+#### Scenario: Updating slash commands for iFlow CLI
+- **WHEN** `.iflow/commands/` contains `openspec-proposal.md`, `openspec-apply.md`, and `openspec-archive.md`
+- **THEN** refresh each file using shared templates
+- **AND** preserve the YAML frontmatter with `name`, `id`, `category`, and `description` fields
+- **AND** update only the OpenSpec-managed block between markers
+- **AND** ensure templates include instructions for the relevant workflow stage
+
 #### Scenario: Missing slash command file
 - **WHEN** a tool lacks a slash command file
 - **THEN** do not create a new file during update

src/core/config.ts

@@ -17,23 +17,25 @@ export interface AIToolOption {
 }
 
 export const AI_TOOLS: AIToolOption[] = [
+  { name: 'Amazon Q Developer', value: 'amazon-q', available: true, successLabel: 'Amazon Q Developer' },
+  { name: 'Antigravity', value: 'antigravity', available: true, successLabel: 'Antigravity' },
   { name: 'Auggie (Augment CLI)', value: 'auggie', available: true, successLabel: 'Auggie' },
   { name: 'Claude Code', value: 'claude', available: true, successLabel: 'Claude Code' },
   { name: 'Cline', value: 'cline', available: true, successLabel: 'Cline' },
-  { name: 'RooCode', value: 'roocode', available: true, successLabel: 'RooCode' },
+  { name: 'Codex', value: 'codex', available: true, successLabel: 'Codex' },
   { name: 'CodeBuddy Code (CLI)', value: 'codebuddy', available: true, successLabel: 'CodeBuddy Code' },
   { name: 'CoStrict', value: 'costrict', available: true, successLabel: 'CoStrict' },
   { name: 'Crush', value: 'crush', available: true, successLabel: 'Crush' },
   { name: 'Cursor', value: 'cursor', available: true, successLabel: 'Cursor' },
   { name: 'Factory Droid', value: 'factory', available: true, successLabel: 'Factory Droid' },
   { name: 'Gemini CLI', value: 'gemini', available: true, successLabel: 'Gemini CLI' },
-  { name: 'OpenCode', value: 'opencode', available: true, successLabel: 'OpenCode' },
-  { name: 'Kilo Code', value: 'kilocode', available: true, successLabel: 'Kilo Code' },
-  { name: 'Qoder (CLI)', value: 'qoder', available: true, successLabel: 'Qoder' },
-  { name: 'Windsurf', value: 'windsurf', available: true, successLabel: 'Windsurf' },
-  { name: 'Codex', value: 'codex', available: true, successLabel: 'Codex' },
   { name: 'GitHub Copilot', value: 'github-copilot', available: true, successLabel: 'GitHub Copilot' },
-  { name: 'Amazon Q Developer', value: 'amazon-q', available: true, successLabel: 'Amazon Q Developer' },
+  { name: 'iFlow', value: 'iflow', available: true, successLabel: 'iFlow' },
+  { name: 'Kilo Code', value: 'kilocode', available: true, successLabel: 'Kilo Code' },
+  { name: 'OpenCode', value: 'opencode', available: true, successLabel: 'OpenCode' },
+  { name: 'Qoder (CLI)', value: 'qoder', available: true, successLabel: 'Qoder' },
   { name: 'Qwen Code', value: 'qwen', available: true, successLabel: 'Qwen Code' },
+  { name: 'RooCode', value: 'roocode', available: true, successLabel: 'RooCode' },
+  { name: 'Windsurf', value: 'windsurf', available: true, successLabel: 'Windsurf' },
   { name: 'AGENTS.md (works with Amp, VS Code, …)', value: 'agents', available: false, successLabel: 'your AGENTS.md-compatible assistant' }
 ];

src/core/configurators/iflow.ts

@@ -0,0 +1,23 @@
+import path from "path";
+import { ToolConfigurator } from "./base.js";
+import { FileSystemUtils } from "../../utils/file-system.js";
+import { TemplateManager } from "../templates/index.js";
+import { OPENSPEC_MARKERS } from "../config.js";
+
+export class IflowConfigurator implements ToolConfigurator {
+  name = "iFlow";
+  configFileName = "IFLOW.md";
+  isAvailable = true;
+
+  async configure(projectPath: string, openspecDir: string): Promise<void> {
+    const filePath = path.join(projectPath, this.configFileName);
+    const content = TemplateManager.getClaudeTemplate();
+
+    await FileSystemUtils.updateFileWithMarkers(
+      filePath,
+      content,
+      OPENSPEC_MARKERS.start,
+      OPENSPEC_MARKERS.end
+    );
+  }
+}

src/core/configurators/registry.ts

@@ -4,6 +4,7 @@ import { ClineConfigurator } from './cline.js';
 import { CodeBuddyConfigurator } from './codebuddy.js';
 import { CostrictConfigurator } from './costrict.js';
 import { QoderConfigurator } from './qoder.js';
+import { IflowConfigurator } from './iflow.js';
 import { AgentsStandardConfigurator } from './agents.js';
 import { QwenConfigurator } from './qwen.js';
 
@@ -16,6 +17,7 @@ export class ToolRegistry {
     const codeBuddyConfigurator = new CodeBuddyConfigurator();
     const costrictConfigurator = new CostrictConfigurator();
     const qoderConfigurator = new QoderConfigurator();
+    const iflowConfigurator = new IflowConfigurator();
     const agentsConfigurator = new AgentsStandardConfigurator();
     const qwenConfigurator = new QwenConfigurator();
     // Register with the ID that matches the checkbox value
@@ -24,6 +26,7 @@ export class ToolRegistry {
     this.tools.set('codebuddy', codeBuddyConfigurator);
     this.tools.set('costrict', costrictConfigurator);
     this.tools.set('qoder', qoderConfigurator);
+    this.tools.set('iflow', iflowConfigurator);
     this.tools.set('agents', agentsConfigurator);
     this.tools.set('qwen', qwenConfigurator);
   }

src/core/configurators/slash/antigravity.ts

@@ -0,0 +1,28 @@
+import { SlashCommandConfigurator } from './base.js';
+import { SlashCommandId } from '../../templates/index.js';
+
+const FILE_PATHS: Record<SlashCommandId, string> = {
+  proposal: '.agent/workflows/openspec-proposal.md',
+  apply: '.agent/workflows/openspec-apply.md',
+  archive: '.agent/workflows/openspec-archive.md'
+};
+
+const DESCRIPTIONS: Record<SlashCommandId, string> = {
+  proposal: 'Scaffold a new OpenSpec change and validate strictly.',
+  apply: 'Implement an approved OpenSpec change and keep tasks in sync.',
+  archive: 'Archive a deployed OpenSpec change and update specs.'
+};
+
+export class AntigravitySlashCommandConfigurator extends SlashCommandConfigurator {
+  readonly toolId = 'antigravity';
+  readonly isAvailable = true;
+
+  protected getRelativePath(id: SlashCommandId): string {
+    return FILE_PATHS[id];
+  }
+
+  protected getFrontmatter(id: SlashCommandId): string | undefined {
+    const description = DESCRIPTIONS[id];
+    return `---\ndescription: ${description}\n---`;
+  }
+}

src/core/configurators/slash/gemini.ts

@@ -1,7 +1,5 @@
-import { FileSystemUtils } from '../../../utils/file-system.js';
-import { SlashCommandConfigurator } from './base.js';
-import { SlashCommandId, TemplateManager } from '../../templates/index.js';
-import { OPENSPEC_MARKERS } from '../../config.js';
+import { TomlSlashCommandConfigurator } from './toml-base.js';
+import { SlashCommandId } from '../../templates/index.js';
 
 const FILE_PATHS: Record<SlashCommandId, string> = {
   proposal: '.gemini/commands/openspec/proposal.toml',
@@ -15,7 +13,7 @@ const DESCRIPTIONS: Record<SlashCommandId, string> = {
   archive: 'Archive a deployed OpenSpec change and update specs.'
 };
 
-export class GeminiSlashCommandConfigurator extends SlashCommandConfigurator {
+export class GeminiSlashCommandConfigurator extends TomlSlashCommandConfigurator {
   readonly toolId = 'gemini';
   readonly isAvailable = true;
 
@@ -23,61 +21,7 @@ export class GeminiSlashCommandConfigurator extends SlashCommandConfigurator {
     return FILE_PATHS[id];
   }
 
-  protected getFrontmatter(_id: SlashCommandId): string | undefined {
-    // TOML doesn't use separate frontmatter - it's all in one structure
-    return undefined;
-  }
-
-  // Override to generate TOML format with markers inside the prompt field
-  async generateAll(projectPath: string, _openspecDir: string): Promise<string[]> {
-    const createdOrUpdated: string[] = [];
-
-    for (const target of this.getTargets()) {
-      const body = this.getBody(target.id);
-      const filePath = FileSystemUtils.joinPath(projectPath, target.path);
-
-      if (await FileSystemUtils.fileExists(filePath)) {
-        await this.updateBody(filePath, body);
-      } else {
-        const tomlContent = this.generateTOML(target.id, body);
-        await FileSystemUtils.writeFile(filePath, tomlContent);
-      }
-
-      createdOrUpdated.push(target.path);
-    }
-
-    return createdOrUpdated;
-  }
-
-  private generateTOML(id: SlashCommandId, body: string): string {
-    const description = DESCRIPTIONS[id];
-
-    // TOML format with triple-quoted string for multi-line prompt
-    // Markers are inside the prompt value
-    return `description = "${description}"
-
-prompt = """
-${OPENSPEC_MARKERS.start}
-${body}
-${OPENSPEC_MARKERS.end}
-"""
-`;
-  }
-
-  // Override updateBody to handle TOML format
-  protected async updateBody(filePath: string, body: string): Promise<void> {
-    const content = await FileSystemUtils.readFile(filePath);
-    const startIndex = content.indexOf(OPENSPEC_MARKERS.start);
-    const endIndex = content.indexOf(OPENSPEC_MARKERS.end);
-
-    if (startIndex === -1 || endIndex === -1 || endIndex <= startIndex) {
-      throw new Error(`Missing OpenSpec markers in ${filePath}`);
-    }
-
-    const before = content.slice(0, startIndex + OPENSPEC_MARKERS.start.length);
-    const after = content.slice(endIndex);
-    const updatedContent = `${before}\n${body}\n${after}`;
-
-    await FileSystemUtils.writeFile(filePath, updatedContent);
+  protected getDescription(id: SlashCommandId): string {
+    return DESCRIPTIONS[id];
   }
 }

src/core/configurators/slash/iflow.ts

@@ -0,0 +1,42 @@
+import { SlashCommandConfigurator } from './base.js';
+import { SlashCommandId } from '../../templates/index.js';
+
+const FILE_PATHS: Record<SlashCommandId, string> = {
+  proposal: '.iflow/commands/openspec-proposal.md',
+  apply: '.iflow/commands/openspec-apply.md',
+  archive: '.iflow/commands/openspec-archive.md'
+};
+
+const FRONTMATTER: Record<SlashCommandId, string> = {
+  proposal: `---
+name: /openspec-proposal
+id: openspec-proposal
+category: OpenSpec
+description: Scaffold a new OpenSpec change and validate strictly.
+---`,
+  apply: `---
+name: /openspec-apply
+id: openspec-apply
+category: OpenSpec
+description: Implement an approved OpenSpec change and keep tasks in sync.
+---`,
+  archive: `---
+name: /openspec-archive
+id: openspec-archive
+category: OpenSpec
+description: Archive a deployed OpenSpec change and update specs.
+---`
+};
+
+export class IflowSlashCommandConfigurator extends SlashCommandConfigurator {
+  readonly toolId = 'iflow';
+  readonly isAvailable = true;
+
+  protected getRelativePath(id: SlashCommandId): string {
+    return FILE_PATHS[id];
+  }
+
+  protected getFrontmatter(id: SlashCommandId): string {
+    return FRONTMATTER[id];
+  }
+}

src/core/configurators/slash/qwen.ts

@@ -5,7 +5,7 @@
  * 
  * @implements {SlashCommandConfigurator}
  */
-import { SlashCommandConfigurator } from './base.js';
+import { TomlSlashCommandConfigurator } from './toml-base.js';
 import { SlashCommandId } from '../../templates/index.js';
 
 /** 
@@ -13,35 +13,15 @@ import { SlashCommandId } from '../../templates/index.js';
  * @type {Record<SlashCommandId, string>}
  */
 const FILE_PATHS: Record<SlashCommandId, string> = {
-  proposal: '.qwen/commands/openspec-proposal.md',
-  apply: '.qwen/commands/openspec-apply.md',
-  archive: '.qwen/commands/openspec-archive.md'
+  proposal: '.qwen/commands/openspec-proposal.toml',
+  apply: '.qwen/commands/openspec-apply.toml',
+  archive: '.qwen/commands/openspec-archive.toml'
 };
 
-/**
- * YAML frontmatter definitions for Qwen command files.
- * These provide metadata for each slash command to ensure proper recognition by Qwen Code.
- * @type {Record<SlashCommandId, string>}
- */
-const FRONTMATTER: Record<SlashCommandId, string> = {
-  proposal: `---
-name: /openspec-proposal
-id: openspec-proposal
-category: OpenSpec
-description: Scaffold a new OpenSpec change and validate strictly.
----`,
-  apply: `---
-name: /openspec-apply
-id: openspec-apply
-category: OpenSpec
-description: Implement an approved OpenSpec change and keep tasks in sync.
----`,
-  archive: `---
-name: /openspec-archive
-id: openspec-archive
-category: OpenSpec
-description: Archive a deployed OpenSpec change and update specs.
----`
+const DESCRIPTIONS: Record<SlashCommandId, string> = {
+  proposal: 'Scaffold a new OpenSpec change and validate strictly.',
+  apply: 'Implement an approved OpenSpec change and keep tasks in sync.',
+  archive: 'Archive a deployed OpenSpec change and update specs.'
 };
 
 /**
@@ -53,10 +33,10 @@ description: Archive a deployed OpenSpec change and update specs.
  * - /openspec-apply: Apply an approved OpenSpec change
  * - /openspec-archive: Archive a deployed OpenSpec change
  */
-export class QwenSlashCommandConfigurator extends SlashCommandConfigurator {
+export class QwenSlashCommandConfigurator extends TomlSlashCommandConfigurator {
   /** Unique identifier for the Qwen tool */
   readonly toolId = 'qwen';
-  
+
   /** Availability status for the Qwen tool */
   readonly isAvailable = true;
 
@@ -69,12 +49,7 @@ export class QwenSlashCommandConfigurator extends SlashCommandConfigurator {
     return FILE_PATHS[id];
   }
 
-  /**
-   * Returns the YAML frontmatter for a given slash command ID.
-   * @param {SlashCommandId} id - The slash command identifier
-   * @returns {string} The YAML frontmatter string
-   */
-  protected getFrontmatter(id: SlashCommandId): string {
-    return FRONTMATTER[id];
+  protected getDescription(id: SlashCommandId): string {
+    return DESCRIPTIONS[id];
   }
 }

src/core/configurators/slash/registry.ts

@@ -17,6 +17,8 @@ import { CrushSlashCommandConfigurator } from './crush.js';
 import { CostrictSlashCommandConfigurator } from './costrict.js';
 import { QwenSlashCommandConfigurator } from './qwen.js';
 import { RooCodeSlashCommandConfigurator } from './roocode.js';
+import { AntigravitySlashCommandConfigurator } from './antigravity.js';
+import { IflowSlashCommandConfigurator } from './iflow.js';
 
 export class SlashCommandRegistry {
   private static configurators: Map<string, SlashCommandConfigurator> = new Map();
@@ -40,6 +42,8 @@ export class SlashCommandRegistry {
     const costrict = new CostrictSlashCommandConfigurator();
     const qwen = new QwenSlashCommandConfigurator();
     const roocode = new RooCodeSlashCommandConfigurator();
+    const antigravity = new AntigravitySlashCommandConfigurator();
+    const iflow = new IflowSlashCommandConfigurator();
 
     this.configurators.set(claude.toolId, claude);
     this.configurators.set(codeBuddy.toolId, codeBuddy);
@@ -59,6 +63,8 @@ export class SlashCommandRegistry {
     this.configurators.set(costrict.toolId, costrict);
     this.configurators.set(qwen.toolId, qwen);
     this.configurators.set(roocode.toolId, roocode);
+    this.configurators.set(antigravity.toolId, antigravity);
+    this.configurators.set(iflow.toolId, iflow);
   }
 
   static register(configurator: SlashCommandConfigurator): void {

src/core/configurators/slash/toml-base.ts

@@ -0,0 +1,66 @@
+import { FileSystemUtils } from '../../../utils/file-system.js';
+import { SlashCommandConfigurator } from './base.js';
+import { SlashCommandId } from '../../templates/index.js';
+import { OPENSPEC_MARKERS } from '../../config.js';
+
+export abstract class TomlSlashCommandConfigurator extends SlashCommandConfigurator {
+  protected getFrontmatter(_id: SlashCommandId): string | undefined {
+    // TOML doesn't use separate frontmatter - it's all in one structure
+    return undefined;
+  }
+
+  protected abstract getDescription(id: SlashCommandId): string;
+
+  // Override to generate TOML format with markers inside the prompt field
+  async generateAll(projectPath: string, _openspecDir: string): Promise<string[]> {
+    const createdOrUpdated: string[] = [];
+
+    for (const target of this.getTargets()) {
+      const body = this.getBody(target.id);
+      const filePath = FileSystemUtils.joinPath(projectPath, target.path);
+
+      if (await FileSystemUtils.fileExists(filePath)) {
+        await this.updateBody(filePath, body);
+      } else {
+        const tomlContent = this.generateTOML(target.id, body);
+        await FileSystemUtils.writeFile(filePath, tomlContent);
+      }
+
+      createdOrUpdated.push(target.path);
+    }
+
+    return createdOrUpdated;
+  }
+
+  private generateTOML(id: SlashCommandId, body: string): string {
+    const description = this.getDescription(id);
+
+    // TOML format with triple-quoted string for multi-line prompt
+    // Markers are inside the prompt value
+    return `description = "${description}"
+
+prompt = """
+${OPENSPEC_MARKERS.start}
+${body}
+${OPENSPEC_MARKERS.end}
+"""
+`;
+  }
+
+  // Override updateBody to handle TOML format
+  protected async updateBody(filePath: string, body: string): Promise<void> {
+    const content = await FileSystemUtils.readFile(filePath);
+    const startIndex = content.indexOf(OPENSPEC_MARKERS.start);
+    const endIndex = content.indexOf(OPENSPEC_MARKERS.end);
+
+    if (startIndex === -1 || endIndex === -1 || endIndex <= startIndex) {
+      throw new Error(`Missing OpenSpec markers in ${filePath}`);
+    }
+
+    const before = content.slice(0, startIndex + OPENSPEC_MARKERS.start.length);
+    const after = content.slice(endIndex);
+    const updatedContent = `${before}\n${body}\n${after}`;
+
+    await FileSystemUtils.writeFile(filePath, updatedContent);
+  }
+}

src/core/init.ts

@@ -862,6 +862,22 @@ export class InitCommand {
       )
     );
 
+    // Show restart instruction if any tools were configured
+    if (created.length > 0 || refreshed.length > 0) {
+      console.log();
+      console.log(PALETTE.white('Important: Restart your IDE'));
+      console.log(
+        PALETTE.midGray(
+          'Slash commands are loaded at startup. Please restart your coding assistant'
+        )
+      );
+      console.log(
+        PALETTE.midGray(
+          'to ensure the new /openspec commands appear in your command palette.'
+        )
+      );
+    }
+
     // Get the selected tool name(s) for display
     const toolName = this.formatToolNames(selectedTools);
 

test/core/init.test.ts

@@ -50,7 +50,7 @@ describe('InitCommand', () => {
     process.env.CODEX_HOME = path.join(testDir, '.codex');
 
     // Mock console.log to suppress output during tests
-    vi.spyOn(console, 'log').mockImplementation(() => {});
+    vi.spyOn(console, 'log').mockImplementation(() => { });
   });
 
   afterEach(async () => {
@@ -213,6 +213,50 @@ describe('InitCommand', () => {
       expect(archiveContent).toContain('Run `openspec archive <id> --yes`');
     });
 
+    it('should create Antigravity workflows when Antigravity is selected', async () => {
+      queueSelections('antigravity', DONE);
+
+      await initCommand.execute(testDir);
+
+      const agProposal = path.join(
+        testDir,
+        '.agent/workflows/openspec-proposal.md'
+      );
+      const agApply = path.join(
+        testDir,
+        '.agent/workflows/openspec-apply.md'
+      );
+      const agArchive = path.join(
+        testDir,
+        '.agent/workflows/openspec-archive.md'
+      );
+
+      expect(await fileExists(agProposal)).toBe(true);
+      expect(await fileExists(agApply)).toBe(true);
+      expect(await fileExists(agArchive)).toBe(true);
+
+      const proposalContent = await fs.readFile(agProposal, 'utf-8');
+      expect(proposalContent).toContain('---');
+      expect(proposalContent).toContain('description: Scaffold a new OpenSpec change and validate strictly.');
+      expect(proposalContent).toContain('<!-- OPENSPEC:START -->');
+      expect(proposalContent).toContain('**Guardrails**');
+      expect(proposalContent).not.toContain('auto_execution_mode');
+
+      const applyContent = await fs.readFile(agApply, 'utf-8');
+      expect(applyContent).toContain('---');
+      expect(applyContent).toContain('description: Implement an approved OpenSpec change and keep tasks in sync.');
+      expect(applyContent).toContain('<!-- OPENSPEC:START -->');
+      expect(applyContent).toContain('Work through tasks sequentially');
+      expect(applyContent).not.toContain('auto_execution_mode');
+
+      const archiveContent = await fs.readFile(agArchive, 'utf-8');
+      expect(archiveContent).toContain('---');
+      expect(archiveContent).toContain('description: Archive a deployed OpenSpec change and update specs.');
+      expect(archiveContent).toContain('<!-- OPENSPEC:START -->');
+      expect(archiveContent).toContain('Run `openspec archive <id> --yes`');
+      expect(archiveContent).not.toContain('auto_execution_mode');
+    });
+
     it('should always create AGENTS.md in project root', async () => {
       queueSelections(DONE);
 
@@ -372,6 +416,59 @@ describe('InitCommand', () => {
       expect(updatedContent).not.toContain('Custom instruction added by user');
     });
 
+    it('should create IFlow CLI slash command files with templates', async () => {
+      queueSelections('iflow', DONE);
+      await initCommand.execute(testDir);
+
+      const iflowProposal = path.join(
+        testDir,
+        '.iflow/commands/openspec-proposal.md'
+      );
+      const iflowApply = path.join(
+        testDir,
+        '.iflow/commands/openspec-apply.md'
+      );
+      const iflowArchive = path.join(
+        testDir,
+        '.iflow/commands/openspec-archive.md'
+      );
+
+      expect(await fileExists(iflowProposal)).toBe(true);
+      expect(await fileExists(iflowApply)).toBe(true);
+      expect(await fileExists(iflowArchive)).toBe(true);
+
+      const proposalContent = await fs.readFile(iflowProposal, 'utf-8');
+      expect(proposalContent).toContain('description: Scaffold a new OpenSpec change and validate strictly.');
+      expect(proposalContent).toContain('<!-- OPENSPEC:START -->');
+      expect(proposalContent).toContain('**Guardrails**');
+      expect(proposalContent).toContain('<!-- OPENSPEC:END -->');
+
+      const applyContent = await fs.readFile(iflowApply, 'utf-8');
+      expect(applyContent).toContain('description: Implement an approved OpenSpec change and keep tasks in sync.');
+      expect(applyContent).toContain('Work through tasks sequentially');
+
+      const archiveContent = await fs.readFile(iflowArchive, 'utf-8');
+      expect(archiveContent).toContain('description: Archive a deployed OpenSpec change and update specs.');
+      expect(archiveContent).toContain('openspec archive <id>');
+    });
+
+    it('should update existing IFLOW.md with markers', async () => {
+      queueSelections('iflow', DONE);
+
+      const iflowPath = path.join(testDir, 'IFLOW.md');
+      const existingContent = '# My IFLOW Instructions\nCustom instructions here';
+      await fs.writeFile(iflowPath, existingContent);
+
+      await initCommand.execute(testDir);
+
+      const updatedContent = await fs.readFile(iflowPath, 'utf-8');
+      expect(updatedContent).toContain('<!-- OPENSPEC:START -->');
+      expect(updatedContent).toContain("@/openspec/AGENTS.md");
+      expect(updatedContent).toContain('openspec update');
+      expect(updatedContent).toContain('<!-- OPENSPEC:END -->');
+      expect(updatedContent).toContain('Custom instructions here');
+    });
+
     it('should create OpenCode slash command files with templates', async () => {
       queueSelections('opencode', DONE);
 
@@ -424,15 +521,15 @@ describe('InitCommand', () => {
       const qwenConfigPath = path.join(testDir, 'QWEN.md');
       const proposalPath = path.join(
         testDir,
-        '.qwen/commands/openspec-proposal.md'
+        '.qwen/commands/openspec-proposal.toml'
       );
       const applyPath = path.join(
         testDir,
-        '.qwen/commands/openspec-apply.md'
+        '.qwen/commands/openspec-apply.toml'
       );
       const archivePath = path.join(
         testDir,
-        '.qwen/commands/openspec-archive.md'
+        '.qwen/commands/openspec-archive.toml'
       );
 
       expect(await fileExists(qwenConfigPath)).toBe(true);
@@ -446,21 +543,16 @@ describe('InitCommand', () => {
       expect(qwenConfigContent).toContain('<!-- OPENSPEC:END -->');
 
       const proposalContent = await fs.readFile(proposalPath, 'utf-8');
-      expect(proposalContent).toContain('name: /openspec-proposal');
-      expect(proposalContent).toContain('category: OpenSpec');
-      expect(proposalContent).toContain('description: Scaffold a new OpenSpec change and validate strictly.');
+      expect(proposalContent).toContain('description = "Scaffold a new OpenSpec change and validate strictly."');
+      expect(proposalContent).toContain('prompt = """');
       expect(proposalContent).toContain('<!-- OPENSPEC:START -->');
 
       const applyContent = await fs.readFile(applyPath, 'utf-8');
-      expect(applyContent).toContain('name: /openspec-apply');
-      expect(applyContent).toContain('category: OpenSpec');
-      expect(applyContent).toContain('description: Implement an approved OpenSpec change and keep tasks in sync.');
+      expect(applyContent).toContain('description = "Implement an approved OpenSpec change and keep tasks in sync."');
       expect(applyContent).toContain('Work through tasks sequentially');
 
       const archiveContent = await fs.readFile(archivePath, 'utf-8');
-      expect(archiveContent).toContain('name: /openspec-archive');
-      expect(archiveContent).toContain('category: OpenSpec');
-      expect(archiveContent).toContain('description: Archive a deployed OpenSpec change and update specs.');
+      expect(archiveContent).toContain('description = "Archive a deployed OpenSpec change and update specs."');
       expect(archiveContent).toContain('openspec archive <id>');
     });
 
@@ -854,6 +946,18 @@ describe('InitCommand', () => {
       expect(wsChoice.configured).toBe(true);
     });
 
+    it('should mark Antigravity as already configured during extend mode', async () => {
+      queueSelections('antigravity', DONE, 'antigravity', DONE);
+      await initCommand.execute(testDir);
+      await initCommand.execute(testDir);
+
+      const secondRunArgs = mockPrompt.mock.calls[1][0];
+      const antigravityChoice = secondRunArgs.choices.find(
+        (choice: any) => choice.value === 'antigravity'
+      );
+      expect(antigravityChoice.configured).toBe(true);
+    });
+
     it('should mark Codex as already configured during extend mode', async () => {
       queueSelections('codex', DONE, 'codex', DONE);
       await initCommand.execute(testDir);

test/core/update.test.ts

@@ -152,19 +152,17 @@ Old slash content
   it('should refresh existing Qwen slash command files', async () => {
     const applyPath = path.join(
       testDir,
-      '.qwen/commands/openspec-apply.md'
+      '.qwen/commands/openspec-apply.toml'
     );
     await fs.mkdir(path.dirname(applyPath), { recursive: true });
-    const initialContent = `---
-name: /openspec-apply
-id: openspec-apply
-category: OpenSpec
-description: Old description
----
+    const initialContent = `description = "Implement an approved OpenSpec change and keep tasks in sync."
 
+prompt = """
 <!-- OPENSPEC:START -->
 Old body
-<!-- OPENSPEC:END -->`;
+<!-- OPENSPEC:END -->
+"""
+`;
     await fs.writeFile(applyPath, initialContent);
 
     const consoleSpy = vi.spyOn(console, 'log');
@@ -172,8 +170,8 @@ Old body
     await updateCommand.execute(testDir);
 
     const updated = await fs.readFile(applyPath, 'utf-8');
-    expect(updated).toContain('name: /openspec-apply');
-    expect(updated).toContain('category: OpenSpec');
+    expect(updated).toContain('description = "Implement an approved OpenSpec change and keep tasks in sync."');
+    expect(updated).toContain('prompt = """');
     expect(updated).toContain('<!-- OPENSPEC:START -->');
     expect(updated).toContain('Work through tasks sequentially');
     expect(updated).not.toContain('Old body');
@@ -184,7 +182,7 @@ Old body
     );
     expect(logMessage).toContain('AGENTS.md (created)');
     expect(logMessage).toContain(
-      'Updated slash commands: .qwen/commands/openspec-apply.md'
+      'Updated slash commands: .qwen/commands/openspec-apply.toml'
     );
 
     consoleSpy.mockRestore();
@@ -193,22 +191,20 @@ Old body
   it('should not create missing Qwen slash command files on update', async () => {
     const applyPath = path.join(
       testDir,
-      '.qwen/commands/openspec-apply.md'
+      '.qwen/commands/openspec-apply.toml'
     );
 
     await fs.mkdir(path.dirname(applyPath), { recursive: true });
     await fs.writeFile(
       applyPath,
-      `---
-name: /openspec-apply
-id: openspec-apply
-category: OpenSpec
-description: Old description
----
+      `description = "Old description"
 
+prompt = """
 <!-- OPENSPEC:START -->
 Old content
-<!-- OPENSPEC:END -->`
+<!-- OPENSPEC:END -->
+"""
+`
     );
 
     await updateCommand.execute(testDir);
@@ -219,11 +215,11 @@ Old content
 
     const proposalPath = path.join(
       testDir,
-      '.qwen/commands/openspec-proposal.md'
+      '.qwen/commands/openspec-proposal.toml'
     );
     const archivePath = path.join(
       testDir,
-      '.qwen/commands/openspec-archive.md'
+      '.qwen/commands/openspec-archive.toml'
     );
 
     await expect(FileSystemUtils.fileExists(proposalPath)).resolves.toBe(false);
@@ -467,6 +463,38 @@ Old body
     consoleSpy.mockRestore();
   });
 
+  it('should refresh existing Antigravity workflows', async () => {
+    const agPath = path.join(
+      testDir,
+      '.agent/workflows/openspec-apply.md'
+    );
+    await fs.mkdir(path.dirname(agPath), { recursive: true });
+    const initialContent = `---
+description: Implement an approved OpenSpec change and keep tasks in sync.
+---
+
+<!-- OPENSPEC:START -->
+Old body
+<!-- OPENSPEC:END -->`;
+    await fs.writeFile(agPath, initialContent);
+
+    const consoleSpy = vi.spyOn(console, 'log');
+
+    await updateCommand.execute(testDir);
+
+    const updated = await fs.readFile(agPath, 'utf-8');
+    expect(updated).toContain('Work through tasks sequentially');
+    expect(updated).not.toContain('Old body');
+    expect(updated).toContain('description: Implement an approved OpenSpec change and keep tasks in sync.');
+    expect(updated).not.toContain('auto_execution_mode: 3');
+
+    const [logMessage] = consoleSpy.mock.calls[0];
+    expect(logMessage).toContain(
+      'Updated slash commands: .agent/workflows/openspec-apply.md'
+    );
+    consoleSpy.mockRestore();
+  });
+
   it('should refresh existing Codex prompts', async () => {
     const codexPath = path.join(
       testDir,
@@ -635,6 +663,53 @@ Old Gemini body
 
     consoleSpy.mockRestore();
   });
+  
+  it('should refresh existing IFLOW slash commands', async () => {
+    const iflowProposal = path.join(
+      testDir,
+      '.iflow/commands/openspec-proposal.md'
+    );
+    await fs.mkdir(path.dirname(iflowProposal), { recursive: true });
+    const initialContent = `description: Scaffold a new OpenSpec change and validate strictly."
+
+prompt = """
+<!-- OPENSPEC:START -->
+Old IFlow body
+<!-- OPENSPEC:END -->
+"""
+`;
+    await fs.writeFile(iflowProposal, initialContent);
+
+    const consoleSpy = vi.spyOn(console, 'log');
+
+    await updateCommand.execute(testDir);
+
+    const updated = await fs.readFile(iflowProposal, 'utf-8');
+    expect(updated).toContain('description: Scaffold a new OpenSpec change and validate strictly.');
+    expect(updated).toContain('<!-- OPENSPEC:START -->');
+    expect(updated).toContain('**Guardrails**');
+    expect(updated).toContain('<!-- OPENSPEC:END -->');
+    expect(updated).not.toContain('Old IFlow body');
+
+    const iflowApply = path.join(
+      testDir,
+      '.iflow/commands/openspec-apply.md'
+    );
+    const iflowArchive = path.join(
+      testDir,
+      '.iflow/commands/openspec-archive.md'
+    );
+
+    await expect(FileSystemUtils.fileExists(iflowApply)).resolves.toBe(false);
+    await expect(FileSystemUtils.fileExists(iflowArchive)).resolves.toBe(false);
+
+    const [logMessage] = consoleSpy.mock.calls[0];
+    expect(logMessage).toContain(
+      'Updated slash commands: .iflow/commands/openspec-proposal.md'
+    );
+
+    consoleSpy.mockRestore();
+  });
 
   it('should refresh existing Factory slash commands', async () => {
     const factoryPath = path.join(