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

Steps

1. •Collect snapshot files referenced by the session search results.
2. •Split large diff dumps into per-file patches when needed.
3. •Normalize paths to be repo-relative (no absolute prefixes).
4. •Validate each patch with git apply --check.
5. •Group patches by feature or session for review.

Output

• •A set of cleaned patch files ready for application
• •A log of patches that failed validation or need manual edits