skills: slash frontmatter field has no effect; skills never appear in the command registry #51753

Description

The V2 skills docs document a slash frontmatter field (and metadata.opencode/slash) that controls whether a skill appears in interactive command catalogs. In 2.0.18 the field is not implemented: skills never populate the command registry, so a skill cannot be invoked as /skill-id.

Setting metadata.opencode/slash: true explicitly produces no change. The skill is otherwise wired up correctly — /api/skill returns it with autoinvoke: false parsed as expected, and it loads fine by ID through the skill tool — so this is not a frontmatter-parsing problem.

A command file in ~/.config/opencode/commands/ does appear in the registry immediately, which is the current workaround:

---
description: Rewrite text in ASD-STE100 Simplified Technical English
---

Load the `asd-ste100` skill with the skill tool, then apply it to the text below.

$ARGUMENTS

Related: #51427 (closed) reports the same missing slash support in 2.0.18, and #50638 reports skills missing from the Desktop slash list including with slash: true. Filing separately only to add two details those reports do not cover: that opencode/autoinvoke parses correctly from the same metadata block (ruling out malformed frontmatter as the cause), and the command-file workaround above. Happy for this to be merged into either.

Steps to reproduce

1. Create ~/.config/opencode/skills/example/SKILL.md:

   ---
   name: example
   description: An example skill
   metadata:
     opencode/autoinvoke: false
     opencode/slash: true
   ---
   
   Body.

2. opencode api get /api/skill — the skill is listed, with "autoinvoke": false.

3. opencode api get /api/command — only init and review are returned. example is absent.

4. Type / in the TUI — no example entry.

Reproduces 100% of the time, including across a full service restart.

Plugins

None.

OpenCode version

2.0.18 (latest)

Operating System

Linux 7.2.4-ogc3.1.fc44.x86_64 (Fedora 44)

Terminal

xterm-256color, COLORTERM=truecolor, TERM_PROGRAM unset

Screenshot and/or share link

None. The /api/command and /api/skill responses above are the evidence; happy to attach a share link if useful.