[RaghavChamadiya]

save_test_coverage sliced the records at the 250k cap before deduping. At the cap, later tests and files vanished in report order, a test could be cut part way and still look measured, and coverage add counted duplicates and cut rows together.

• cap_test_map (pure) merges a repeated (test, file) pair before the cap, unioning its lines. It then keeps whole tests in a stable order (test file, then test id). The test that reaches the cap is kept whole, and every later test is left out whole.
• Truncation stays visible. A truncated map therefore stores at least the cap's rows, so the shared map_is_truncated check keeps firing and test selection runs every test.
• Readers. The missing-test signal and test impact now use the same truncation check as test selection. On a truncated map, a file's missing tests are unknown, never untested.
• Write path and output. The write is one bulk delete plus batched bulk inserts. coverage add reports merged records and the tests left out.

Stacked on #4328.

Verification

• Unit tests:
  • dedupe before the cap;
  • whole-test cuts independent of input order;
  • union merge;
  • a truncated save reading as truncated;
  • truncated-map readers returning unknown;
  • the CLI output.
• A 250k-pair map saves in 8.7 s instead of 24.5 s (median of 3, temp SQLite).
• tests/unit/{persistence,analysis,server/mcp} plus the coverage and impacted-tests CLI tests: 9,029 passed.
• ruff check clean.

[repowise-bot]

🔍 2 things to check

1. This PR introduces 2 new findings across 1 file: 1× complex method, 1× io in loop (see all)
2. packages/core/src/repowise/core/analysis/health/coverage/discovery.py changed in 11 of the 20 commits that touched packages/cli/src/repowise/cli/commands/coverage_cmd.py and is not in this PR

⚠️ Health of changed files: 5.5 → 5.4 (-0.1; structure -0.1)
_{Average full file score (structure and history) of 9 changed code files, weighted by size before this PR; not the repository score.}

Check	Result
Coverage	95.4% of 66 changed lines covered · 3 uncovered in 2 files
Tests	3 of 3 changed code files reached by a test · which tests
Security	No new findings on changed lines
Doc drift	No drift in docs this PR edits

Coverage: 3 uncovered changed lines

Patch coverage 95.4% (63 of 66 changed executable lines covered)

2717897 · cobertura · 5 of 9 changed files measured, 4 out of scope

File	Uncovered changed lines	Covered
packages/cli/src/repowise/cli/commands/coverage_cmd.py	345-346	3 of 5
packages/core/src/repowise/core/persistence/crud/analysis/coverage_map.py	67	46 of 47

Report from this run for 2717897.

🧾 Evidence: 1 to look at, 6 not known

Item	Status	Evidence
Components touched	ok · inferred	2 components: packages, tests
Declared owners	ok · declared	@RaghavChamadiya, @swati510
Suggested reviewers	unknown · not known	Not known: not gathered on a pull request
Tests reaching the change	unknown · not known	0 of 3 changed files reached by a test; 3 not known
Contracts touched	ok · measured	No workspace contract touched; no breaking signature change
Consumers in other repos	unknown · not known	Not known: not gathered on a pull request
Decisions crossed	unknown · not known	Not known: decision records are read only for an AI review
Health delta	look · measured	Findings: 2 introduced, 0 worsened, 0 resolved
AI provenance	unknown · not known	Provenance: unknown, known for 0 of 2 commits; AI share withheld: coverage 0% is below 30%
Diff size rank	ok · measured	Larger than 52.4% of recent commits
Outcomes since merge	unknown · not known	Not known: a pull request is not a merged change

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