OpenCode bridges Claude plans, local execution

This is a sensible agentic workflow, not a novelty workflow: the value is in separating planning quality from execution cost and privacy.

• –OpenCode already supports a built-in Plan mode and markdown mode files, so the handoff can live inside the tool instead of bouncing between separate apps
• –The planning step needs to produce strict acceptance criteria, file-level scope, and test instructions, or the local executor will drift fast
• –Qwen 3.6 27B Q8 is a reasonable local implementer, but it will do better on narrow, well-scoped tasks than on open-ended refactors
• –Keeping plans in-repo under `.opencode/plans/*.md` makes the workflow auditable and easier to iterate on
• –The biggest improvement is probably not a different model, but tighter contracts between planner and executor