tdmcp-coverage-writer

tdmcp-coverage-writer is an agent for Claude Code from hybridlabor-api/bdb-dev-optimized-agent-skills. It costs 69 tokens per session (257 once invoked), scanned A, a copy of tdmcp-coverage-writer, Apache-2.0.

A focused test writer that adds tests for one assigned gap, using the project's existing Vitest and mock patterns. It checks real results, errors, warnings, and boundary data.

In plain words
What is it for?
Use it to add unit or integration tests for tools, clients, servers, resources, error paths, and other specific seams.
Why use it?
It improves confidence in behavior that existing tests do not cover without expanding the task into unrelated production changes. It also helps expose bugs while the tests are being written.

Agent for Claude Code

Written for Claude Code: installed under .claude/. Also seen: model in frontmatter.

Good fit Use it to add unit or integration tests for tools, clients, servers, resources, error paths, and other specific seams.

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Install with agentmods
npx agentmods add agents/hybridlabor-api/bdb-dev-optimized-agent-skills/tdmcp-coverage-writer
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.

Clone the repo
git clone --depth 1 https://github.com/hybridlabor-api/bdb-dev-optimized-agent-skills

Made for: Claude Code.

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 tdmcp-coverage-writer

README.md
[![agentmods](https://agentmods.dev/badge/agents/hybridlabor-api/bdb-dev-optimized-agent-skills/tdmcp-coverage-writer/github.svg)](https://agentmods.dev/agents/hybridlabor-api/bdb-dev-optimized-agent-skills/tdmcp-coverage-writer)
Your own site
<a href="https://agentmods.dev/agents/hybridlabor-api/bdb-dev-optimized-agent-skills/tdmcp-coverage-writer"><img src="https://agentmods.dev/badge/agents/hybridlabor-api/bdb-dev-optimized-agent-skills/tdmcp-coverage-writer/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for tdmcp-coverage-writer

Your own site · 80×15
<a href="https://agentmods.dev/agents/hybridlabor-api/bdb-dev-optimized-agent-skills/tdmcp-coverage-writer"><img src="https://agentmods.dev/badge/agents/hybridlabor-api/bdb-dev-optimized-agent-skills/tdmcp-coverage-writer.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 69 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 257 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin 100% copy Near-identical to another mod 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 $0.00069 $0.00257
Opus 5 $0.00034 $0.00129
Sonnet 5 $0.00014 $0.00051
Haiku 4.5 $0.00007 $0.00026

Measured 5d ago against content hash 018c96762943, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-08, from the pricing page.

Security

Grade A, and why

tdmcp-coverage-writer 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 5d 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

This is a copy

100% identical to tdmcp-coverage-writer — 0 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

mcps/tdmcp/.claude/agents/tdmcp-coverage-writer.md · 27 lines

What it actually says

tdmcp-coverage-writer

You add coverage for one assigned seam. Load the tdmcp-coverage-writer skill before editing.

Working rules

  • Read the implementation and the nearest existing tests before writing.
  • Prefer behavior assertions over snapshots or import-only coverage.
  • For tools, call the exported ...Impl with a mocked ToolContext and assert the real CallToolResult, bridge payload, warnings, and isError behavior.
  • For client/server/resource code, test the boundary shape that callers depend on.
  • Keep edits scoped to the requested test/support files unless the lead explicitly assigns a production fix.
  • Run the narrow test you touched and report the command plus result.

Output

Report files changed, behaviors covered, uncovered branches that remain, and any production bug found while writing the tests.

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. 5d ago First seen · 27 lines · 69 tokens per session scan A 018c96762943

Subscribe to this mod's changes

tdmcp-coverage-writer is an agent published in the GitHub repository hybridlabor-api/bdb-dev-optimized-agent-skills (6 stars, last pushed 3d ago), licensed Apache-2.0. It adds 69 tokens to every session and 257 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 0 findings. It is 100% identical to tdmcp-coverage-writer, differing in 0 lines, and is treated as a copy.

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