oma link opencode generates invalid OpenCode config

[Melivo]

Summary

oma link opencode generates an invalid OpenCode project configuration for OpenCode 1.17.8.

Symptoms

After running oma link opencode, OpenCode fails to bootstrap the project with:

Failed to finish bootstrap instance Error: ConfigInvalidError

Root Cause

Two issues were observed:

1. The generated .opencode/agents/*.md files contain:

tools: []

OpenCode's current config schema does not accept tools as an array in agent frontmatter. This causes ConfigInvalidError.

2. oma link opencode copies the plugin bridge to:

.opencode/plugins/oma/oma.ts

but does not register it in .opencode/opencode.jsonc. On OpenCode 1.17.8, the plugin was not auto-discovered; opencode debug info reported:

plugins:
none

Expected Behavior

oma link opencode should generate OpenCode-compatible config:

• Omit invalid tools: [] from generated OpenCode agent frontmatter.
• Explicitly register the local plugin in .opencode/opencode.jsonc, for example:

{
  "$schema": "https://opencode.ai/config.json",
  "plugin": ["./plugins/oma/oma.ts"]
}

Verification

After removing tools: [] and adding the explicit plugin registration:

opencode debug config --print-logs --log-level DEBUG
opencode debug info --print-logs --log-level DEBUG

both succeed, and opencode debug info lists:

file:///.../.opencode/plugins/oma/oma.ts

A local patch was also validated with the targeted test suites:

bunx vitest run platform/agent-composer.test.ts __tests__/opencode-plugin.test.ts

Result: 2 test files passed, 39 tests passed.

Environment

• oh-my-agent: 10.3.2
• OpenCode: 1.17.8
• OS: Windows

[gracefullight]

Fixed on main in 6227e1b.

Changes:

1. Agent frontmatter — omit tools when no tools resolve instead of emitting tools: [], which OpenCode rejects (it expects an object map, not an array). The same guard applies to Cursor's empty default.
2. Plugin registration — oma link opencode now merges an explicit plugin entry into .opencode/opencode.jsonc via a string-aware JSONC merge (idempotent, preserves existing keys):

"plugin": ["./plugins/oma/oma.ts"]

This is required because OpenCode 1.17.8 does not auto-discover plugins nested under plugins/oma/.

Tests: coverage added in cli/platform/agent-composer.test.ts and cli/__tests__/opencode-plugin.test.ts.

After updating to the latest main, re-run oma link opencode and verify with:

opencode debug config --print-logs --log-level DEBUG
opencode debug info --print-logs --log-level DEBUG

Thanks for the detailed report — both root causes matched exactly.