# Coverage > Fetch coverage diff from Codecov for the current branch or a specific PR. Shows uncovered lines, patch coverage, and overall coverage change. Use when this capability is needed. - Skill: `tomevault-io/coverage` (Agent Skill, multi-file: 2 files) - Install (CLI): `npx skillmds@latest add tomevault-io/coverage` - Raw SKILL.md: https://api.skillmd.com/api/skills/tomevault-io/coverage/raw - Safety review: pending (external: skill-scanner PASS, skillspector PASS) - Works with: Claude Code, Claude.ai, OpenAI Codex - Category: Coding & Dev Tools - Author: tomevault-io (https://skillmd.com/u/tomevault-io) - Updated: 2026-09-17 - Page: https://skillmd.com/skills/tomevault-io/coverage --- # Coverage Fetch line-by-line coverage information from Codecov for a GitHub pull request. ## Instructions Use this skill to check code coverage for your changes before merging. ### Current branch (auto-detect PR) ```bash uv run scripts/codecov_diff.py ``` This auto-detects the org, repo, and PR number using the `gh` CLI based on the current branch. ### Specific PR number ```bash uv run scripts/codecov_diff.py 123 ``` ## Output The script outputs: - PR title and state - HEAD coverage (overall coverage on the branch) - Patch coverage (coverage of changed lines only) - Coverage change (+/- percentage) - Per-file breakdown with: - Missed line count - Patch coverage percentage - Specific uncovered line numbers (as ranges like `45-48, 52, 60-65`) - Partial coverage line numbers ## Requirements - The `gh` CLI must be installed and authenticated for auto-detection - The PR must have Codecov coverage data uploaded --- > Converted and distributed by [TomeVault](https://tomevault.io/claim/pydantic) — claim your Tome and manage your conversions.