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claude-engineering-plugin/docs/reports/2026-02-20-opencode-command-md-merge/decisions.md
2026-02-20 13:20:48 -05:00

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# Decision Log: OpenCode Commands as .md Files
## Decision: ADR-001 - Store Commands as Individual .md Files
**Date:** 2026-02-20
**Status:** Adopted
## Context
The original design stored commands configurations inline in `opencode.json` under `config.command`. This tightly couples command metadata with config, making it harder to version-control commands separately and share command files.
## Decision
Store commands definitions as individual `.md` files in `.opencode/commands/` directory, with YAML frontmatter for metadata and markdown body for the command prompt.
**New Type:**
```typescript
export type OpenCodeCommandFile = {
name: string // command name, used as filename stem: <name>.md
content: string // full file content: YAML frontmatter + body
}
```
**Bundle Structure:**
```typescript
export type OpenCodeBundle = {
config: OpenCodeConfig
agents: OpenCodeAgentFile[]
commandFiles: OpenCodeCommandFile[] // NEW
plugins: OpenCodePluginFile[]
skillDirs: { sourceDir: string; name: string }[]
}
```
## Consequences
- **Positive:** Commands can be versioned, shared, and edited independently
- **Negative:** Requires updating converter, writer, and all consumers
- **Migration:** Phase 1-4 will implement the full migration
## Alternatives Considered
1. Keep inline in config - Rejected: limits flexibility
2. Use separate JSON files - Rejected: YAML frontmatter is more idiomatic for command
---
## Decision: Phase 2 - Converter Emits .md Files
**Date:** 2026-02-20
**Status:** Implemented
## Context
The converter needs to populate `commandFiles` in the bundle rather than `config.command`.
## Decision
`convertCommands()` returns `OpenCodeCommandFile[]` where each file contains:
- **filename**: `<command-name>.md`
- **content**: YAML frontmatter (`description`, optionally `model`) + body (template text with Claude path rewriting)
### Frontmatter Structure
```yaml
---
description: "Review code changes"
model: openai/gpt-4o
---
Template text here...
```
### Filtering
- Commands with `disableModelInvocation: true` are excluded from output
### Path Rewriting
- `.claude/` paths rewritten to `.opencode/` in body content (via `rewriteClaudePaths()`)
## Consequences
- Converter now produces command files ready for file-system output
- Writer phase will handle writing to `.opencode/commands/` directory
- Phase 1 type changes are now fully utilizeds