skills: project .agents created after startup is not discovered until config reload

This has been generated by AI:

Description

A project-level .agents/skills directory created after OpenCode has already opened the project is not discovered until something else triggers config.updated (or a service restart).

Config discovery only registers .agents when it already exists (fs.up()). Config watchers then only cover directory (.opencode, ~/.config/opencode) and file (opencode.json) entries, not a missing project .agents path. The skill plugin therefore never receives an AgentsDirectory source, so #41622's firstMissing() watcher is never installed.

#41622 should cover the case where .agents already exists and only skills/ appears later. It does not cover creating the whole .agents tree after startup.

Plugins

@ramtinj95/opencode-tokenscope (fails to load; unrelated)

OpenCode version

0.0.0-next-17430

Steps to reproduce

1. Open a project that has no .agents directory.
2. Create .agents/skills/<id>/SKILL.md.
3. Check /api/skill or the skill catalog without restarting the service or changing config.

Screenshot and/or share link

Observed on 0.0.0-next-17430:

• 12:15:35 project location services booted; no watch on <project>/.agents/skills
• 12:16:10 .agents/skills/<id>/SKILL.md created
• five-minute catalog.updated events did not rescan skill sources
• 13:31:34 unrelated config.updated finally subscribed to <project>/.agents/skills and registered the skill

Operating System

macOS 26.5.0 (darwin arm64)

Terminal

Ghostty