test-coverage

A command that examines how much of a codebase is exercised by tests and creates tests for uncovered code. Test coverage measures which code paths run during testing.

In plain words
What is it for?
Use it to run coverage-enabled tests, inspect coverage reports, add unit, integration, and end-to-end tests, and verify the resulting coverage.
Why use it?
It finds untested functions, error paths, edge cases, APIs, and key workflows instead of relying only on existing tests. It checks progress against an 80% coverage target.

Command for Claude Code

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add commands/cfrs2005/claude-init/test-coverage
Clone the repo
git clone --depth 1 https://github.com/cfrs2005/claude-init

Made for: Claude Code.

Per session 0 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 208 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5 $0.00000 $0.00208
Opus 5 $0.00000 $0.00104
Sonnet 5 $0.00000 $0.00042
Haiku 4.5 $0.00000 $0.00021

Measured yesterday against content hash 9eed98de4782, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

test-coverage scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured yesterday.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

templates/.claude/commands/test-coverage.md · 28 lines

What it actually says

测试覆盖率 (Test Coverage)

分析测试覆盖率并生成缺失的测试:

  1. 运行带覆盖率的测试:npm test --coveragepnpm test --coverage

  2. 分析覆盖率报告 (coverage/coverage-summary.json)

  3. 识别低于 80% 覆盖率阈值的文件

  4. 对每个覆盖率不足的文件:

    • 分析未测试的代码路径
    • 为函数生成单元测试
    • 为 API 生成集成测试
    • 为关键流程生成 E2E 测试
  5. 验证新测试通过

  6. 显示前/后覆盖率指标

  7. 确保项目达到 80%+ 的整体覆盖率

重点关注:

  • 快乐路径 (Happy path) 场景
  • 错误处理
  • 边缘情况 (null, undefined, empty)
  • 边界条件
Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. yesterday First seen · 28 lines · 0 tokens per session scan A 9eed98de4782

Subscribe to this mod's changes

test-coverage is a command published in the GitHub repository cfrs2005/claude-init (1,365 stars, last pushed 5mo ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 208 tokens. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.