---
title: "Test Coverage Improver - Air Market"
description: "You are heading toward a release and you are not sure the tests would catch a regression. This runs the coverage checks, ranks the gaps by risk, and proposes the tests worth writing, with attention t…"
canonical: "https://airmarket.ai/app/test-coverage-improver"
---

[Air Market](/) / [Developer Tools](/category/devtools) / Test Coverage Improver

Skill by [RustFS](/@rustfs)

# Test Coverage Improver

Find the untested code most likely to bite you before release

## What this does

You are heading toward a release and you are not sure the tests would catch a regression. This runs the coverage checks, ranks the gaps by risk, and proposes the tests worth writing, with attention to code you have changed and code that matters. Reach for it before you ship.

### Top 3 things it does for you

- Check what the tests actually cover
- Rank the gaps by how risky they are
- Get tests proposed for the paths that matter most

## Information

**Test Coverage Improver at a glance**

|  |  |
| --- | --- |
| Kind | Skill |
| Publisher | [RustFS](/@rustfs) |
| Category | [Developer Tools](/category/devtools) |
| Works with | Agent Skills - an open standard supported by 40+ agents |
| Size | 3 KB |
| Licence | Apache-2.0 |
| Repository | [rustfs/rustfs](https://github.com/rustfs/rustfs/tree/3898d524fee2bf1b40cd5f57e4b3ab13da712c9b/.agents/skills/test-coverage-improver) |
| GitHub stars | 31,352 (as of Nov 2026) |
| Installs | 4, counted by skills.sh (Nov 2026) |

## Security report

**Verified.** AIR scanned this exact version of Test Coverage Improver and flagged nothing. AIR's verdict: **safe**.

**What Test Coverage Improver's check was run against**

|  |  |
| --- | --- |
| Commit | 3898d524fee2bf1b40cd5f57e4b3ab13da712c9b |
| Content hash | a3e209e6831dd4dbc9240dab05955bbb0f62406ad66efcff17305fa4bf83359b |
| Files read | [Browse the files at this exact commit](https://github.com/rustfs/rustfs/blob/3898d524fee2bf1b40cd5f57e4b3ab13da712c9b/.agents/skills/test-coverage-improver/SKILL.md) |

A scan is named by the exact content it read, not by a version number. A different version is a different artifact, and nothing here applies to a version AIR has not scanned.

[Read the full security report for Test Coverage Improver](/security/test-coverage-improver)

## About Test Coverage Improver

This runs the project's coverage checks and ranks the high-risk gaps it finds.

From there it proposes high-impact tests, focused on improving regression confidence for changed and critical code paths before a release.

## What's inside

- SKILL.md - instructions
- agents/openai.yaml - data
- references/coverage-prioritization.md - reference

## Questions

### Is Test Coverage Improver safe to install?

AIR scanned this exact version of Test Coverage Improver and flagged nothing. AIR's verdict: safe. The verdict is named by the content that was read, at commit 3898d524fee2, so it cannot drift onto a version nobody scanned. The full report is at https://airmarket.ai/security/test-coverage-improver.

### How do I install Test Coverage Improver?

Open https://airmarket.ai/app/test-coverage-improver on Air Market and use the install action: Air Market hands Claude a prompt naming this exact skill, and Claude sets it up. Source, pinned to the exact commit this listing describes: https://github.com/rustfs/rustfs/tree/3898d524fee2bf1b40cd5f57e4b3ab13da712c9b/.agents/skills/test-coverage-improver. Install from that link, not the branch.

## Related on Air Market

- [More Developer Tools listings](/category/devtools)
- [Everything by RustFS](/@rustfs)

---

Canonical URL: <https://airmarket.ai/app/test-coverage-improver>