feat(opencode): native plugin with auto-discovery for all 68 skills + 42 commands

[jeongY-Cho]

What this does

Gives OpenCode first-class PM Skills support. Until now it was the only major target with no native path — users had to hand-copy skills/ folders, re-do it on every update, and still got none of the /slash command workflows. This PR ships a bundled plugin that auto-registers everything at runtime: one-line install, nothing to copy, stays in sync on git pull.

What's in here

.opencode/plugins/pm-skills.js — the plugin itself. On init it scans pm-*/ dirs at the repo root, injects each pm-*/skills/ path into config.skills.paths (OpenCode lazily discovers every SKILL.md — no symlinks, no config edits; works because Config.get() is a cached singleton), frontmatter-parses pm-*/commands/*.md with gray-matter, and registers each as config.command[name]. Structured logging throughout (init / scan / per-command load / totals) under the opencode-pm-skills service so setup is observable.

package.json — root npm manifest. OpenCode reads the root package.json to find the plugin entry point; without it the plugin doesn't load. Declares gray-matter as a dependency.

README.md — adds the OpenCode install section with the one-line config snippet, plus formatting consistency fixes.

CLAUDE.md — updates the repo structure docs and the OpenCode reference in the project overview.

.gitignore — ignores node_modules/ for the plugin's npm deps.

docs/opencode-auto-discovery-plugin.md — written proposal capturing the design (gap, approach, install, verification) for record and discussion.

How to review

The plugin file is the core — read .opencode/plugins/pm-skills.js first. The rest is wiring (package.json at root so OpenCode finds the entry point), docs (README + CLAUDE.md sections), and the proposal. 13 commits because this was iterated to working state (rename, package.json location, default→named export, formatting) — the final state is what matters.

Install

{
  "plugin": ["pm-skills@git+https://github.com/phuryn/pm-skills.git"]
}

Then restart OpenCode.

Verification

• Plugin loads and logs Found 9 plugin directories.
• All 9 pm-*/skills/ paths land in config.skills.paths.
• All 42 pm-*/commands/*.md register in config.command (one per file).
• /write-prd and the create-prd skill resolve and invoke in a fresh OpenCode session.

Result

All 68 skills + 42 /slash commands available natively. One-line install. Stays in sync with the repo on git pull — no manual copying, no drift.