This skill gives an agent a sharply bounded job: take a diff or patch and produce an HTML report that a human can review without opening a terminal or Git hosting UI. The output is useful in real workflows where raw patch text is too ugly for stakeholders, clients, auditors, or async reviewers. An agent can generate side-by-side or line-by-line views, bundle the report into release artifacts, and attach it to issue threads, docs, or internal approvals.

Invoke this when the input already exists as a git diff, patch file, or CI-generated change set and the user needs a portable review artifact. It is especially useful for compliance snapshots, vendor review packages, incident postmortems, and status updates where you want the actual code delta preserved in a readable form. Do not invoke it when the user simply wants a normal GitHub or GitLab code review, repository hosting, or automated code analysis. Diff2Html renders diffs. It does not replace source control, comment workflows, or review policy.

That scope boundary is the difference between a skill and a product card. The value here is the agent behavior: collect the diff, format it consistently, generate shareable HTML, and route the artifact where it belongs. Integration points include git hooks, CI pipelines, release packaging jobs, documentation systems, and chat or ticket workflows that need a self-contained review attachment rather than a repo link.