1. Habit
  2. Skills
  3. Spec Impl skill
klerith · 4K installs

Spec Impl skill
Runs by itself, you implement a spec.

Approved specs implemented on their branch.

Install the Spec Impl skill and make it a habit: follow https://gethabit.dev/skills/klerith/spec-impl.md

  1. 1Copy
  2. 2Paste into Claude Code, Codex or Cursor
  3. 3It runs by itself

4K installs327 starsMIT licenceSource on GitHub ↗

Spec Impl

by klerith · 4K installs

The skill

Spec impl implements an approved spec: it validates the Approved state in any language, creates a branch named after the spec, and works the plan step by step with pauses to review each diff.

Only when you ask.

The habit

Approved specs implemented on their branch.

↻ Runs by itselfyou implement a spec

How the habit works.
You don't have to.

Three questionsWhen does it start? How does it check its work? What does it remember?

01

It starts by itself

you implement a spec. Runs in Claude Code slash command.

  • ↻ you implement a spec
  • run /spec-impl with the spec name

02

It checks its work

approved-state gate and step pauses. If a check fails, it tells you.

  • ✓the spec state means Approved before any work
  • ✓the branch spec-NN-slug is active
  • ✓each plan step pauses for the user's diff review
  • ✓no commit is made unless the user asks

03

It remembers

spec and branch. The next run reads it first: the spec file, its state and the plan steps.

specs/

One run, step by step.
Then it stops.

Stop ruleStops after the plan steps of one spec are implemented.

  1. 01

    Identify the spec

    Find the spec in specs/ from the number, slug or full name given.

  2. 02

    Validate the state

    Continue only if the state means Approved in any language; otherwise stop with the standard message.

  3. 03

    Create the branch

    Check the working tree, then create and switch to spec-NN-slug per the AutoCreateBranch flag.

  4. 04

    Show the summary

    Show the objective, scope, implementation plan and acceptance criteria before coding.

  5. 05

    Implement step by step

    Do one plan step, show the touched files, and pause for the diff review before the next.

  6. 06

    Finish

    After the last step, remind the user to verify the acceptance criteria and commit.

What it may do.
Nothing more.

Safe by defaultIt writes only in its own folder and asks you before anything goes out.

Is it for you?
Use it when it fits.

Quick checkRead both lists. If the left one sounds like you, the Spec Impl skill helps.

Use it when

  • ✓ You implement an approved spec
  • ✓ You want branch-per-spec work
  • ✓ You want step-by-step diff reviews

Skip it when

  • – The spec is still a draft
  • – You want the spec designed, not built

Questions

Spec Impl skill, answered.

Can it implement a Draft spec?

No. The state must mean Approved; a human makes that change, not the agent.

Does it commit the work?

No. It writes code and shows the diff; committing is your decision and your command.

How do I install the Spec Impl skill?

Copy the prompt at the top into your agent. It installs the skill from klerith/fernando-skills and sets up the habit. Or run npx skills add klerith/fernando-skills --skill spec-impl.

Is the Spec Impl skill free?

Yes. It is published under MIT. Habit is free too.

Spec Impl. Now as a habit.

Install the Spec Impl skill and make it a habit: follow https://gethabit.dev/skills/klerith/spec-impl.md

  • Free
  • No account
  • Undo in one line

All klerith skills →More code skills →

Works in

  • Claude Code
  • Codex
  • Cursor
  • ChatGPT
  • Claude app

Made by klerith, published under MIT. Habit links to the original and never changes it. Is this your skill?

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