tdd-verified

tdd-verified is a skill for Claude Code, Codex from Eilodon/DPS-Superskills-MCP. It costs 49 tokens per session (1,666 once invoked), scanned A, original, Apache-2.0.

A development workflow that requires evidence before claiming that a change works. For behaviour code, TDD means writing a failing test first, then implementing the change, and finally improving the code.

In plain words
What is it for?
It is for implementing and checking software changes, with tests or another declared proof method used to verify the result.
Why use it?
It helps catch incorrect assumptions and prevents unverified feature, bug-fix, configuration, or documentation claims.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit It is for implementing and checking software changes, with tests or another declared proof method used to verify the result.

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Install with agentmods
npx agentmods add skills/eilodon/dps-superskills-mcp/tdd-verified
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.

Any agent
npx skills add Eilodon/DPS-Superskills-MCP --skill tdd-verified
Clone the repo
git clone --depth 1 https://github.com/Eilodon/DPS-Superskills-MCP

Made for: Claude Code, Codex.

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 tdd-verified

README.md
[![agentmods](https://agentmods.dev/badge/skills/eilodon/dps-superskills-mcp/tdd-verified/github.svg)](https://agentmods.dev/skills/eilodon/dps-superskills-mcp/tdd-verified)
Your own site
<a href="https://agentmods.dev/skills/eilodon/dps-superskills-mcp/tdd-verified"><img src="https://agentmods.dev/badge/skills/eilodon/dps-superskills-mcp/tdd-verified/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 tdd-verified

Your own site · 80×15
<a href="https://agentmods.dev/skills/eilodon/dps-superskills-mcp/tdd-verified"><img src="https://agentmods.dev/badge/skills/eilodon/dps-superskills-mcp/tdd-verified.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 49 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,666 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 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 $0.00049 $0.01666
Opus 5 $0.00024 $0.00833
Sonnet 5 $0.00010 $0.00333
Haiku 4.5 $0.00005 $0.00167

Measured 10d ago against content hash 171c326c2ef3, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade A, and why

tdd-verified 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 10d 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.

docs/DPS-superskills-v5.2.1/tdd-verified/SKILL.md · 183 lines

How it starts

The opening of the file, as written. The whole thing — 183 lines — stays where its author put it; the contents beside it link to each section on GitHub.

TDD-Verified — Proof-First Development with Evidence Anchors

Register: DISCIPLINE — Iron Laws apply. Non-negotiable.

This skill enforces proof-first development. For behavior code and bug fixes, the default proof mode is RED-GREEN-REFACTOR with VHEATM evidence anchors at every gate. For migrations, config, docs, or spikes, declare an alternate proof mode before implementation.

Core principle: Evidence before claims. If you didn't watch the test fail, you don't know if it tests the right thing. If you didn't run verification, you cannot claim it passes.

Violating the letter of these rules is violating their spirit.


The Iron Laws

1. NO IMPLEMENTATION WITHOUT A DECLARED PROOF MODE
2. NO BEHAVIOR CODE WITHOUT A FAILING TEST FIRST
3. NO COMPLETION CLAIM WITHOUT FRESH VERIFICATION EVIDENCE
4. NO FIX CLAIM WITHOUT A FIX ANCHOR (file:line re-read after change)

For behavior code, writing code before the failing test means delete it and start over. For other work, the declared proof mode defines the evidence gate.


Proof Mode Declaration

Declare one before implementation:

Proof mode Use when Required evidence
TEST_FIRST behavior code, feature logic, bug fixes failing test observed first, then passing test/suite
MIGRATION_DRY_RUN schema/data migration, backfill dry-run output, backup/rollback or accepted irreversibility, checksum/count plan
CONFIG_SMOKE config, routing, deployment settings config diff, smoke command, environment-specific verification
DOC_SOURCE_CHECK README/spec/docs claims source cross-check against code/spec/ADR; label unverified claims T4
SPIKE_THROWAWAY exploratory prototype timeboxed learning, explicit throwaway status; cannot ship until converted to another proof mode

No completion claim is allowed until the proof mode has T1/T2 evidence.


RED-GREEN-REFACTOR with Evidence Gates

RED — Write Failing Test

Write one minimal test showing exactly what should happen.

Read the full file on GitHub · 183 lines

Files

What ships with it

1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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. 10d ago First seen · 183 lines · 49 tokens per session scan A 171c326c2ef3

Subscribe to this mod's changes

tdd-verified is a skill published in the GitHub repository Eilodon/DPS-Superskills-MCP (0 stars, last pushed 2mo ago), licensed Apache-2.0. It adds 49 tokens to every session and 1,666 once invoked, about $0.0002 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 2026-08-31.