watch: complete the run-half (4.2) — affected-test selection + coverage-on-save#1
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…ge-on-save `m watch --run` no longer re-runs every suite on each save: it now runs only the suites that exercise a changed routine, and `--coverage` reports line coverage for the changed routines. Affected-test selection (mtest): - ReferencedRoutines extracts a suite's external call targets (LABEL^ROUTINE / ^ROUTINE / $$^ROUTINE) via workspace.References; local bare-label calls are excluded. - Discover records them on TestSuite.Deps. - Affected(suites, changed) picks suites whose own routine changed or whose Deps intersect the changed set. Coverage-on-save: - New mcov.ByFile per-file rollup (also de-duplicates coverageCmd's inline rollup — one code path now). - m watch --coverage (implies --run) measures the changed routines while driving the affected suites; prints `cov: <routine> C/T P%`. Validated live on m-test-engine (YDB); gofmt/vet/golangci-lint clean; go test -race ./... green. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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Completes stage 4.2
m watchrun-half (compile·test·coverage).Affected-test selection
m watch --runno longer re-runs every suite on save — it runs only the suites that exercise a changed routine.mtest.ReferencedRoutinesextracts a suite's external call targets (LABEL^ROUTINE/^ROUTINE/$$^ROUTINE) viaworkspace.References; local bare-label calls excluded.Discoverrecords them onTestSuite.Deps.Affected(suites, changed)selects suites whose own routine changed or whose Deps intersect the changed set.Coverage-on-save
mcov.ByFileper-file rollup (also de-duplicatescoverageCmd's inline rollup — one code path now).m watch --coverage(implies--run) measures the changed routines while driving the affected suites; printscov: <routine> C/T P%.Verification
go vet/ golangci-lint clean;go test -race ./...green;internal/mtest85.1%.m-test-engine(YDB): affected selection — baseline2/2, editSTR.m→1/1(MATHTST skipped), edit unreferenced routine →no suites affected; coverage — editMATH.m→tests: 1/1 ok+cov: MATH.m 1/2 50.0%.Tracker flip (4.2 ◐ → ✅) is in the companion
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