tdd-migration-pipeline

tdd-migration-pipeline is a skill for Claude Code from parcadei/Continuous-Claude-v3. It costs 26 tokens per session (1,410 once invoked), scanned A, original, MIT.

An agent-led workflow for migrating or rewriting a codebase with test-driven development, or TDD. TDD means writing a failing test first, then implementing the smallest change that makes it pass.

In plain words
What is it for?
Use it to port systems between languages or frameworks, perform large refactors, and preserve existing behavior through delegated analysis, implementation, and validation.
Why use it?
It gives large migrations a staged process with behavioral requirements and tests, while keeping the coordinating agent from accumulating the whole codebase in its context.

Skill for Claude Code

Written for Claude Code: allowed-tools in frontmatter. Also seen: mentions subagents; names the TodoWrite tool.

not rated 3.9krepo +2 7mo ago A scan Socket: passSnyk: passSkillSpector: pass 26 tokens original MIT

Good fit Use it to port systems between languages or frameworks, perform large refactors, and preserve existing behavior through delegated analysis, implementation, and validation.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/parcadei/continuous-claude-v3/tdd-migration-pipeline
About the project

Continuous-Claude-v3 is a Claude Code development environment that preserves working context between sessions, coordinates specialized agents, and stores project knowledge through ledgers, handoffs, and analysis tools. It is for people using Claude Code on ongoing or complex software work. Its catalogue entries are the skills, agents, hooks, plugin, and setting that provide its workflows and orchestration.

parcadei/Continuous-Claude-v3 · 3,938 stars · on GitHub

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 parcadei/Continuous-Claude-v3 --skill tdd-migration-pipeline
Clone the repo
git clone --depth 1 https://github.com/parcadei/Continuous-Claude-v3

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 tdd-migration-pipeline

README.md
[![agentmods](https://agentmods.dev/badge/skills/parcadei/continuous-claude-v3/tdd-migration-pipeline/github.svg)](https://agentmods.dev/skills/parcadei/continuous-claude-v3/tdd-migration-pipeline)
Your own site
<a href="https://agentmods.dev/skills/parcadei/continuous-claude-v3/tdd-migration-pipeline"><img src="https://agentmods.dev/badge/skills/parcadei/continuous-claude-v3/tdd-migration-pipeline/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-migration-pipeline

Your own site · 80×15
<a href="https://agentmods.dev/skills/parcadei/continuous-claude-v3/tdd-migration-pipeline"><img src="https://agentmods.dev/badge/skills/parcadei/continuous-claude-v3/tdd-migration-pipeline.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 26 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,410 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. Third-party audits
  • Socket pass 18 Mar 2026
  • Snyk pass 15 Feb 2026
  • NVIDIA SkillSpector pass 7 Sept 2026
How audits are shown
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 $0.00026 $0.01410
Opus 5 $0.00013 $0.00705
Sonnet 5 $0.00005 $0.00282
Haiku 4.5 $0.00003 $0.00141

Measured 8d ago against content hash a98f20aeaa0f, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

tdd-migration-pipeline 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 8d 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/skills/tdd-migration-pipeline/SKILL.md · 190 lines

How it starts

The opening of the file, as written. The whole thing — 190 lines — stays where its author put it; the contents beside it link to each section on GitHub.

TDD Migration Pipeline

Orchestrator-only workflow for migrating or rewriting codebases. You do NOT read files, write code, or validate anything yourself. You only instruct agents and pipe context (paths, not contents).

When to Use

  • Migrating codebase from one language/framework to another
  • Rewriting a system with TDD guarantees
  • Large-scale refactoring with behavioral contracts
  • When you want zero context growth in the orchestrator

Core Principles

  1. ZERO orchestrator execution - only instruct and pipe context
  2. All work done by agents - you never read/write/validate
  3. Context window stays flat - pass paths, not contents
  4. New code in separate directory - never modify source

Your Constraints

  • Never say "let me read..." or "looking at..."
  • Only say "Agent X: do Y with Z"
  • Your context should NOT grow during execution
  • All agents must use qlty and tldr skills

Pipeline Phases

Phase 1: SPEC

Instruct spec-agent (use scout or architect):
- Analyze {source_path} using tldr-skill
- Output: spec.md with behavioral contracts, types, edge cases

Agent prompt template:

Analyze the codebase at {source_path} using tldr commands (tldr structure, tldr extract, tldr calls).
Create spec.md with:
- All behavioral contracts (what each function/class promises)
- Input/output types
- Edge cases and invariants
- Dependencies between components
Write to: {target_dir}/spec.md

Phase 2: FAILING TESTS

Instruct test-agent (use arbiter):
- Read spec.md
- Write failing tests in {target_dir}/tests/
- Tests should define expected behavior before implementation

Instruct review-agent (use critic):
- Validate tests cover spec completely
- No gaps in behavioral coverage

Phase 3: ADVERSARIAL (x3 iterations)

Instruct premortem-agent (use premortem skill):
- Review spec + tests
- Identify failure modes, race conditions, edge cases
- DO NOT ASK - just add mitigations directly to spec
- Run 3 passes with fresh perspective each time

Read the full file on GitHub · 190 lines

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. 8d ago First seen · 190 lines · 26 tokens per session scan A a98f20aeaa0f

Subscribe to this mod's changes

tdd-migration-pipeline is a skill published in the GitHub repository parcadei/Continuous-Claude-v3 (3,938 stars, last pushed 7mo ago), licensed MIT. It adds 26 tokens to every session and 1,410 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 2026-09-03.

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