avc diff

Shows added, modified, and deleted files between two snapshots, with line-level counts and unified diff previews.

Usage

avc diff snap-abc123 snap-def456
avc diff snap-abc123 snap-def456 --json

Arguments

Argument	Required	Description
<from_id>	yes	Older snapshot ID
<to_id>	yes	Newer snapshot ID

JSON output

{
  "from_snapshot": "snap-abc123",
  "to_snapshot": "snap-def456",
  "files": [
    {
      "path": "src/auth.go",
      "type": "modified",
      "old_hash": "abc...",
      "new_hash": "def...",
      "lines_added": 5,
      "lines_removed": 2,
      "diff_preview": "+func NewAuth() Auth {\n+  return &authImpl{}\n"
    },
    {
      "path": "src/old.go",
      "type": "deleted",
      "old_hash": "ghi...",
      "lines_added": 0,
      "lines_removed": 45
    }
  ]
}

Change types: added · modified · deleted

How it works

AVC reads both snapshots’ file lists and builds a per-path comparison:

Old	New	Type
✓	✓ (same hash)	(skipped — no change)
✓	✓ (different hash)	modified
✗	✓	added
✓	✗	deleted

For each changed file, the unified diff is generated from the stored object blobs using an LCS (longest common subsequence) algorithm.

See also

• avc diff-current — compare a snapshot to the working tree instead of another snapshot