iterative-development
by alinaqiThe iterative-development skill uses Claude Code Stop hooks to run tests after each response and feed failures back automatically. It is useful for Workflow Automation, TDD loops, and fast verification when you want Claude to keep iterating until checks pass.
This skill scores 74/100, which means it is listable but best presented with clear caveats. For directory users, it offers a real iterative TDD workflow built around Claude Code Stop hooks, so it is more actionable than a generic prompt. However, it is oriented toward setup/configuration of the loop rather than a broad, user-invocable task skill, so install value depends on whether the user specifically wants this hook-based development pattern.
- Explicit trigger context: when-to-use says it is for setting up or configuring TDD loops via Stop hooks.
- Concrete operational model: explains the Stop hook behavior, exit code 2 feedback loop, and test/lint/typecheck cycle.
- Substantial skill body with structured headings and code examples, which helps an agent follow the workflow with less guesswork.
- Marked user-invocable: false, so it is not meant for direct end-user triggering and may be less broadly reusable as a general skill.
- No support files or install command were provided, so adoption depends on reading the SKILL.md closely and setting up the hook manually.
Overview of iterative-development skill
What iterative-development is
The iterative-development skill is a Claude Code workflow for running tests after each model response and feeding failures back automatically through a Stop hook. It is most useful when you want a tighter TDD loop than a normal prompt can provide, especially for feature work where each pass should be validated before the conversation ends.
Who should install it
This iterative-development skill fits developers who already rely on tests, linting, or type checks and want Claude to stay inside a correction loop until those checks pass. It is a good match for Workflow Automation setups, but less useful if your project has no reliable test command or if you prefer manual review after each answer.
Why it matters in practice
The main value is not “better prompting”; it is reducing the gap between code generation and verification. The skill makes Claude respond to real failures, which helps catch broken assumptions early, avoid one-shot implementations, and keep the iteration focused on whatever your repo actually rejects.
How to Use iterative-development skill
Install and locate the workflow files
Use the repository install flow for iterative-development install, then open SKILL.md first. This skill has no helper scripts or side folders, so the operating logic lives almost entirely in that one file. If you want the shortest path to understanding, read SKILL.md before anything else.
Start with a testable task brief
The iterative-development usage pattern works best when your prompt names a concrete outcome, the relevant files, and the validation command you expect the loop to run. A strong brief looks like: “Add password reset validation in src/auth/, keep existing API shape, and run npm test plus npm run lint after each pass.” That is better than “improve auth” because the hook needs a deterministic target to verify.
Read the hook logic before relying on it
For an iterative-development guide, focus on the sections that explain how the Stop hook exits, how stderr is returned to Claude, and what the TDD loop checks on each turn. Those are the parts that determine whether the workflow actually iterates or just stops after a failed command. If the repo includes a Python variant, compare it with your shell setup before copying anything into a different environment.
Use it where verification is cheap and repeatable
The best inputs are tasks with fast feedback: unit tests, lint rules, type checks, or a small integration suite. Avoid using it for vague research tasks, one-off debugging without a repeatable command, or projects where the “correct” outcome cannot be expressed as a checkable failure.
iterative-development skill FAQ
Is iterative-development only for TDD?
No. It is TDD-friendly, but the real requirement is a repeatable validation command that can fail fast and tell Claude what to fix. You can use it for code changes, refactors, and cleanup work as long as the loop has clear pass/fail signals.
How is it different from a normal prompt?
A normal prompt may produce code once and leave validation to you. The iterative-development skill adds an automated stop-and-fix cycle, so Claude sees test failures immediately and can correct them before the session ends. That makes it more reliable for Workflow Automation than a generic “write tests too” instruction.
Is it beginner-friendly?
Yes, if you already know how to run tests and read failures. It is less beginner-friendly if you are still learning your project’s tooling, because the skill assumes you can identify a trustworthy check command and understand why it failed.
When should I not use it?
Do not use it when your project has unstable tests, slow end-to-end checks, or commands that produce noisy failures unrelated to the code change. In those cases, the loop can waste time or trap Claude in repetitive fixes instead of converging on a real solution.
How to Improve iterative-development skill
Give the loop better constraints
The biggest quality jump comes from naming the exact commands, files, and acceptance criteria up front. Instead of “make this work,” say what must pass, what must not change, and which failure should be treated as decisive. That makes the iterative-development skill more likely to converge on the right fix instead of wandering.
Make failures easy to interpret
If your test output is long, flaky, or ambiguous, Claude gets weaker feedback. Improve the skill by shortening the validation path, isolating the failing command, and keeping the error surface small. A concise failing test is more useful than three broad checks that all fail for different reasons.
Iterate on the prompt after the first pass
If the first output is close but not correct, update the prompt with the exact gap: “tests pass, but the hook should also run npm run typecheck,” or “keep the public API stable while changing the implementation.” That is better than re-asking from scratch because the skill works best when each cycle adds one precise constraint.
Watch for loop-breaking mistakes
Common failures are using a command that never exits cleanly, asking for goals that cannot be validated automatically, or omitting the repository’s real test entry point. If the loop seems stuck, simplify the task, point Claude to the authoritative test command, and verify that the Stop hook is actually configured to return failures through stderr.