Skill: OpenCode Extract Diffs

Goal

Extract diff snapshots from OpenCode artifacts and normalize them into clean patch files.

Use This Skill When

• You have session artifacts that contain raw diff dumps
• The user requests reconstructing changes from snapshots
• You need to turn OpenCode output into patch files

Do Not Use This Skill When

• You already have clean patches or a branch to cherry-pick
• The change can be reimplemented faster than extracting diffs

Inputs

• Snapshot/diff artifact location(s)
• Target repo root
• Staging directory for patches