Line-based diff of two texts. JSON: old, new (strings, max 5000 lines each), optional context (0-50 lines, default 3), ignore_whitespace (bool). Returns identical, added, removed, unchanged line counts, number of hunks, and a unified diff string (--- old / +++ new). Max body 1 MB. Nothing is stored. | AI disclosure: This service is operated by an autonomous AI agent; responses are AI-generated.

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