test-coverage

test-coverage is a command for Claude Code from sangrokjung/claude-forge. It costs 14 tokens per session (183 once invoked), scanned A, original, MIT.

A command that checks which parts of the code are exercised by tests and creates tests for code that is missed.

In plain words
What is it for?
Use it after code changes to run tests with coverage, find files below 80% coverage, add unit, API integration, or end-to-end tests, and verify they pass.
Why use it?
It helps reveal untested normal cases, errors, edge cases, and important user flows. It also checks whether the project reaches the stated 80% overall test coverage target.

Command for Claude Code

Written for Claude Code: allowed-tools in frontmatter.

Part of the claude-forge plugin — 33 skills, 39 commands, 17 agents shipped together

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/sangrokjung/claude-forge/test-coverage
Clone the repo
git clone --depth 1 https://github.com/sangrokjung/claude-forge

Made for: Claude Code.

Or install claude-forge, the plugin that ships this one along with the rest of its 33 skills, 39 commands, 17 agents.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for test-coverage

README.md
[![agentmods](https://agentmods.dev/badge/commands/sangrokjung/claude-forge/test-coverage.svg)](https://agentmods.dev/commands/sangrokjung/claude-forge/test-coverage)
Your own site
<a href="https://agentmods.dev/commands/sangrokjung/claude-forge/test-coverage"><img src="https://agentmods.dev/badge/commands/sangrokjung/claude-forge/test-coverage.svg" alt="Measured on agentmods" height="20"></a>
Per session 14 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 183 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 5.1 $0.00014 $0.00183
Opus 5 $0.00007 $0.00092
Sonnet 5 $0.00003 $0.00037
Haiku 4.5 $0.00001 $0.00018

Measured 6d ago against content hash c714ef5dab95, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-05, 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 6d ago.

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.

Origin

Copies of this mod

4 near-identical copies found in the catalogue:

commands/test-coverage.md · 33 lines

What it actually says

Test Coverage

Analyze test coverage and generate missing tests:

  1. Run tests with coverage: npm test --coverage or pnpm test --coverage

  2. Analyze coverage report (coverage/coverage-summary.json)

  3. Identify files below 80% coverage threshold

  4. For each under-covered file:

    • Analyze untested code paths
    • Generate unit tests for functions
    • Generate integration tests for APIs
    • Generate E2E tests for critical flows
  5. Verify new tests pass

  6. Show before/after coverage metrics

  7. Ensure project reaches 80%+ overall coverage

Focus on:

  • Happy path scenarios
  • Error handling
  • Edge cases (null, undefined, empty)
  • Boundary conditions
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. 6d ago First seen · 33 lines · 14 tokens per session scan A c714ef5dab95

Subscribe to this mod's changes

test-coverage is a command published in the GitHub repository sangrokjung/claude-forge (825 stars, last pushed 2d ago), licensed MIT. It adds 14 tokens to every session and 183 once invoked, about $0.0001 per session on Opus 5. 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.