feat(mutation): operator parallelism, multi-format reports, and history tracking#75

Merged

yuchou87 merged 15 commits into

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feat/mutation-v2

May 10, 2026

Commits on May 10, 2026

feat(mutation): add OperatorConcurrency to RunOptions (default 2)
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feat(mutation): parallelize operators — one proxy per operator, bounded by OperatorConcurrency
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refactor(mutation): clarify g.Wait() comment — goroutines never return non-nil error
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feat(mutation): add --operator-concurrency flag (default 2)
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test(mutation): AT-404 — operator-concurrency flag acceptance test
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feat(mutation): RenderMarkdown and RenderHTML — Markdown and HTML report renderers
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feat(mutation): WriteReport accepts format list — json, markdown, html
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fix(mutation): WriteReport expands "all" to json+markdown+html
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feat(mutation): add --report-format flag (json,markdown,html,all)
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test(mutation): acceptance tests AT-405–AT-407 — report-format flag
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feat(mutation): LoadHistory and RenderHistory — history trend table
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feat(mutation): add --history and --history-limit flags
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test(mutation): acceptance tests AT-408–AT-409 — history flag
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fix(mutation): LoadHistory limit before JSON filter; reject unknown report formats early
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fix(mutation): validate report format unconditionally, guard WriteReport default case, fix ↓ delta sign
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