feat: make skills invokable as slash commands in the TUI

- Add Skill.content() method to load skill template content from SKILL.md files
- Modify Command.list() to include skills as invokable commands
- Add 'skill' boolean property to Command.Info schema
- Update autocomplete to show skills with (Skill) label in slash commands
- Regenerate SDK to include skill property in Command type

packages/opencode/src/command/index.ts

@@ -6,6 +6,7 @@ import { Identifier } from "../id/id"
 import PROMPT_INITIALIZE from "./template/initialize.txt"
 import PROMPT_REVIEW from "./template/review.txt"
 import { MCP } from "../mcp"
+import { Skill } from "../skill"
 
 export namespace Command {
   export const Event = {
@@ -27,6 +28,7 @@ export namespace Command {
       agent: z.string().optional(),
       model: z.string().optional(),
       mcp: z.boolean().optional(),
+      skill: z.boolean().optional(),
       // workaround for zod not supporting async functions natively so we use getters
       // https://zod.dev/v4/changelog?id=zfunction
       template: z.promise(z.string()).or(z.string()),
@@ -118,6 +120,21 @@ export namespace Command {
       }
     }
 
+    // Add skills as invokable commands
+    for (const skill of await Skill.all()) {
+      // Skip if a command with this name already exists
+      if (result[skill.name]) continue
+      result[skill.name] = {
+        name: skill.name,
+        description: skill.description,
+        skill: true,
+        get template() {
+          return Skill.content(skill.name).then((content) => content ?? "")
+        },
+        hints: [],
+      }
+    }
+
     return result
   })