tdd-with-memory

A test-first implementation workflow that recalls past decisions, conventions, and lessons before coding. TDD, or test-driven development, means writing a failing test first, then implementing the code and finally cleaning it up.

In plain words
What is it for?
Recalling relevant project memory, writing a failing test, making the smallest implementation, refactoring without changing behavior, running checks, and recording reusable conventions or lessons.
Why use it?
It helps new code follow existing project decisions while keeping the expected behavior explicit and preventing implementation before tests.

Skill for Claude CodeCodex

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 skills/ezbuilder/code-brain/tdd-with-memory
Any agent
npx skills add ezBuilder/code-brain --skill tdd-with-memory
Clone the repo
git clone --depth 1 https://github.com/ezBuilder/code-brain

Made for: Claude Code, Codex.

Per session 35 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 377 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 $0.00035 $0.00377
Opus 5 $0.00017 $0.00188
Sonnet 5 $0.00007 $0.00075
Haiku 4.5 $0.00003 $0.00038

Measured 2d ago against content hash 0d69f037ed16, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

tdd-with-memory 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.

kits/global-agent-kit/.claude/skills/tdd-with-memory/SKILL.md · 27 lines

What it actually says

기억을 활용한 TDD 절차:

  1. 구현 대상을 한 문장으로 정리한다.
  2. 먼저 관련 결정·컨벤션·교훈을 회상한다:
    • .ai/bin/ai memory recall --query "<기능/모듈 핵심어>"
    • 결정만 좁혀 보려면 .ai/bin/ai memory decision list --text "<핵심어>"
  3. RED: 기대 동작을 표현하는 실패 테스트를 먼저 작성한다.
  4. GREEN: 테스트를 통과시키는 가장 작은 구현만 한다.
  5. REFACTOR: 동작을 유지한 채 중복·과설계를 줄인다.
  6. 좁은 테스트부터 실행하고, 필요하면 린트/타입체크를 돌린다.
  7. 재사용할 가치가 있는 새 컨벤션/설계 결정을 기억에 남긴다:
    • .ai/bin/ai memory decision add --text "<채택한 컨벤션/결정>" --tag convention
    • 반복되는 실패 예방책이면 .ai/bin/ai lessons add --failure ... --cause ... --fix ...
  8. 완료 보고에 변경/검증/위험을 적는다.

금지:

  • 테스트 없이 구현부터 작성
  • 통과를 위해 실패 테스트 삭제·약화
  • 기존 결정과 모순되는 컨벤션을 회상 없이 도입(충돌 시 memory conflicts로 확인)
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 · 27 lines · 35 tokens per session scan A 0d69f037ed16

Subscribe to this mod's changes

tdd-with-memory is a skill published in the GitHub repository ezBuilder/code-brain (11 stars, last pushed 2d ago), licensed Apache-2.0. It adds 35 tokens to every session and 377 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 2026-08-30.

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