feat(config): discover commands from .agents/commands and .claude/commands

[mugnimaestra]

Issue for this PR

Closes#27972
Closes#14240

Type of change

• New feature

What does this PR do?

Discovers slash commands from external directories (.agents/commands/, .claude/commands/) in addition to the existing .opencode/command(s)/ paths. Brings command discovery to parity with how skills are already discovered from multiple paths.

Commands placed in .agents/commands/ or .claude/commands/ are automatically discovered:

.agents/commands/deploy.md → /deploy
.claude/commands/review.md → /review

Custom paths via opencode.json:

{ "commands": { "paths": ["my-team/commands"] } }

Discovery precedence (lowest → highest): global ~/.agents/commands/ and ~/.claude/commands/, then project .agents/commands/ and .claude/commands/ (walking up), then commands.paths custom folders, then .opencode/command(s)/ (existing, wins).

How did you verify your code works?

• bun typecheck from packages/opencode — no errors from changed files
• bun test test/config/config.test.ts — 96/96 pass including 4 new tests:
  • loads commands from .agents/commands
  • loads commands from .claude/commands
  • .opencode/command overrides .agents/commands
  • loads commands from config.commands.paths
• bun test test/skill/skill.test.ts — 16/16 pass, no regression
• Full turbo typecheck passed on push (27 packages, 21/21 successful)

Checklist

• I have tested my changes locally
• I have not included unrelated changes in this PR

[github-actions]

The following comment was made by an LLM, it may be inaccurate:

I found one related PR that should be checked:

Related PR:

• #27973: feat(config): load commands from .agents

This PR appears related to command discovery from the .agents directory. Since PR #30629 (the current PR) closes issue #27972 and this related PR #27973 addresses similar functionality, you should verify whether #27973 is a duplicate or complementary work that might need to be coordinated or merged together.

[github-actions]

Thanks for updating your PR! It now meets our contributing guidelines. 👍

[github-actions]

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[mysticfall]

Can we reopen this PR? This is the last missing piece needed to standardise a workflow over 40+ subprojects in my company.