test-coverage-analyzer

A repository-wide review of automated tests and how much of the code they exercise.

In plain words
What is it for?
Use it for test audits, coverage reviews, and planning improvements to a project's testing strategy.
Why use it?
It helps reveal important code paths with no tests and shows where existing tests may be weak or incomplete.

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/diffbot/mcp-code-graph/test-coverage-analyzer
Clone the repo
git clone --depth 1 https://github.com/diffbot/mcp-code-graph

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 182 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 $0.00182
Opus 5 $0.00000 $0.00091
Sonnet 5 $0.00000 $0.00036
Haiku 4.5 $0.00000 $0.00018

Measured 2d ago against content hash cf0e811e653d, 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-analyzer 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 2d 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.

.claude/commands/test-coverage-analyzer.md · 19 lines

What it actually says

Complete Test Coverage Analysis

Analyze test coverage and quality across the entire repository.

This command provides complete testing analysis by:

  1. Identifying all test files and test patterns
  2. Mapping test coverage to source code
  3. Finding untested critical paths
  4. Analyzing test quality and patterns
  5. Generating testing improvement recommendations

Follow these steps:

  1. Use nodes-semantic-search to find all test-related code (test, spec, mock, fixture, jest, mocha)
  2. Get all test implementations with get-code
  3. Analyze test dependencies and coverage with get-usage-dependency-links
  4. Find connections between tests and source code with find-direct-connections
  5. Search for testing documentation and guidelines with docs-semantic-search
  6. Generate comprehensive test coverage report with improvement suggestions

This command is ideal for: test audits, coverage improvement, and testing strategy planning.

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. 2d ago First seen · 19 lines · 0 tokens per session scan A cf0e811e653d

Subscribe to this mod's changes

test-coverage-analyzer is a command published in the GitHub repository diffbot/mcp-code-graph (402 stars, last pushed 9mo ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 182 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.