feat: add OpenCode, Slate, and Cursor host configs

Three new hosts added to the declarative config system. Each is a typed
HostConfig object with paths, frontmatter rules, and path rewrites.
All generate valid SKILL.md output with zero .claude/skills path leakage.

- hosts/opencode.ts: OpenCode (opencode.ai), skills at ~/.config/opencode/
- hosts/slate.ts: Slate (Random Labs), skills at ~/.slate/
- hosts/cursor.ts: Cursor, skills at ~/.cursor/
- .gitignore: add .kiro/, .opencode/, .slate/, .cursor/, .openclaw/

Zero code changes needed — just config files + re-export in index.ts.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

.gitignore

@@ -7,6 +7,11 @@ bin/gstack-global-discover
 .claude/skills/
 .agents/
 .factory/
+.kiro/
+.opencode/
+.slate/
+.cursor/
+.openclaw/
 .context/
 extension/.auth.json
 .gstack-worktrees/

hosts/cursor.ts

@@ -0,0 +1,46 @@
+import type { HostConfig } from '../scripts/host-config';
+
+const cursor: HostConfig = {
+  name: 'cursor',
+  displayName: 'Cursor',
+  cliCommand: 'cursor',
+  cliAliases: [],
+
+  globalRoot: '.cursor/skills/gstack',
+  localSkillRoot: '.cursor/skills/gstack',
+  hostSubdir: '.cursor',
+  usesEnvVars: true,
+
+  frontmatter: {
+    mode: 'allowlist',
+    keepFields: ['name', 'description'],
+    descriptionLimit: null,
+  },
+
+  generation: {
+    generateMetadata: false,
+    skipSkills: ['codex'],
+  },
+
+  pathRewrites: [
+    { from: '~/.claude/skills/gstack', to: '~/.cursor/skills/gstack' },
+    { from: '.claude/skills/gstack', to: '.cursor/skills/gstack' },
+    { from: '.claude/skills', to: '.cursor/skills' },
+  ],
+
+  runtimeRoot: {
+    globalSymlinks: ['bin', 'browse/dist', 'browse/bin', 'gstack-upgrade', 'ETHOS.md'],
+    globalFiles: {
+      'review': ['checklist.md', 'TODOS-format.md'],
+    },
+  },
+
+  install: {
+    prefixable: false,
+    linkingStrategy: 'symlink-generated',
+  },
+
+  learningsMode: 'basic',
+};
+
+export default cursor;

hosts/index.ts

@@ -10,9 +10,12 @@ import claude from './claude';
 import codex from './codex';
 import factory from './factory';
 import kiro from './kiro';
+import opencode from './opencode';
+import slate from './slate';
+import cursor from './cursor';
 
 /** All registered host configs. Add new hosts here. */
-export const ALL_HOST_CONFIGS: HostConfig[] = [claude, codex, factory, kiro];
+export const ALL_HOST_CONFIGS: HostConfig[] = [claude, codex, factory, kiro, opencode, slate, cursor];
 
 /** Map from host name to config. */
 export const HOST_CONFIG_MAP: Record<string, HostConfig> = Object.fromEntries(
@@ -59,4 +62,4 @@ export function getExternalHosts(): HostConfig[] {
 }
 
 // Re-export individual configs for direct import
-export { claude, codex, factory, kiro };
+export { claude, codex, factory, kiro, opencode, slate, cursor };

hosts/opencode.ts

@@ -0,0 +1,46 @@
+import type { HostConfig } from '../scripts/host-config';
+
+const opencode: HostConfig = {
+  name: 'opencode',
+  displayName: 'OpenCode',
+  cliCommand: 'opencode',
+  cliAliases: [],
+
+  globalRoot: '.config/opencode/skills/gstack',
+  localSkillRoot: '.opencode/skills/gstack',
+  hostSubdir: '.opencode',
+  usesEnvVars: true,
+
+  frontmatter: {
+    mode: 'allowlist',
+    keepFields: ['name', 'description'],
+    descriptionLimit: null,
+  },
+
+  generation: {
+    generateMetadata: false,
+    skipSkills: ['codex'],
+  },
+
+  pathRewrites: [
+    { from: '~/.claude/skills/gstack', to: '~/.config/opencode/skills/gstack' },
+    { from: '.claude/skills/gstack', to: '.opencode/skills/gstack' },
+    { from: '.claude/skills', to: '.opencode/skills' },
+  ],
+
+  runtimeRoot: {
+    globalSymlinks: ['bin', 'browse/dist', 'browse/bin', 'gstack-upgrade', 'ETHOS.md'],
+    globalFiles: {
+      'review': ['checklist.md', 'TODOS-format.md'],
+    },
+  },
+
+  install: {
+    prefixable: false,
+    linkingStrategy: 'symlink-generated',
+  },
+
+  learningsMode: 'basic',
+};
+
+export default opencode;

hosts/slate.ts

@@ -0,0 +1,46 @@
+import type { HostConfig } from '../scripts/host-config';
+
+const slate: HostConfig = {
+  name: 'slate',
+  displayName: 'Slate',
+  cliCommand: 'slate',
+  cliAliases: [],
+
+  globalRoot: '.slate/skills/gstack',
+  localSkillRoot: '.slate/skills/gstack',
+  hostSubdir: '.slate',
+  usesEnvVars: true,
+
+  frontmatter: {
+    mode: 'allowlist',
+    keepFields: ['name', 'description'],
+    descriptionLimit: null,
+  },
+
+  generation: {
+    generateMetadata: false,
+    skipSkills: ['codex'],
+  },
+
+  pathRewrites: [
+    { from: '~/.claude/skills/gstack', to: '~/.slate/skills/gstack' },
+    { from: '.claude/skills/gstack', to: '.slate/skills/gstack' },
+    { from: '.claude/skills', to: '.slate/skills' },
+  ],
+
+  runtimeRoot: {
+    globalSymlinks: ['bin', 'browse/dist', 'browse/bin', 'gstack-upgrade', 'ETHOS.md'],
+    globalFiles: {
+      'review': ['checklist.md', 'TODOS-format.md'],
+    },
+  },
+
+  install: {
+    prefixable: false,
+    linkingStrategy: 'symlink-generated',
+  },
+
+  learningsMode: 'basic',
+};
+
+export default slate;