Implement

Implement is a skill for Claude Code from Nagiliant/Genesis-Legacy-V2. It costs 40 tokens per session (643 once invoked), scanned A, original, Apache-2.0.

A development workflow for implementing exactly one small, written specification at a time. It limits changes to the files named in the specification and checks the stated acceptance criteria.

In plain words
What is it for?
Use it to implement a micro-specification, write required tests, verify the result, and create one commit and one pull request.
Why use it?
It reduces scope creep by making each change traceable to one instruction set and one reviewable change.

Skill for Claude Code

Written for Claude Code: argument-hint in frontmatter.

Part of the genesis-spec-kit plugin — 23 skills shipped together

Good fit Use it to implement a micro-specification, write required tests, verify the result, and create one commit and one pull request.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/nagiliant/genesis-legacy-v2/genesis-implement
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 Nagiliant/Genesis-Legacy-V2 --skill genesis-implement
Clone the repo
git clone --depth 1 https://github.com/Nagiliant/Genesis-Legacy-V2

Made for: Claude Code.

Or install genesis-spec-kit, the plugin that ships this one along with the rest of its 23 skills.

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 Implement

README.md
[![agentmods](https://agentmods.dev/badge/skills/nagiliant/genesis-legacy-v2/genesis-implement/github.svg)](https://agentmods.dev/skills/nagiliant/genesis-legacy-v2/genesis-implement)
Your own site
<a href="https://agentmods.dev/skills/nagiliant/genesis-legacy-v2/genesis-implement"><img src="https://agentmods.dev/badge/skills/nagiliant/genesis-legacy-v2/genesis-implement/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 Implement

Your own site · 80×15
<a href="https://agentmods.dev/skills/nagiliant/genesis-legacy-v2/genesis-implement"><img src="https://agentmods.dev/badge/skills/nagiliant/genesis-legacy-v2/genesis-implement.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 40 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 643 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 $0.00040 $0.00643
Opus 5 $0.00020 $0.00321
Sonnet 5 $0.00008 $0.00129
Haiku 4.5 $0.00004 $0.00064

Measured 10d ago against content hash 30792b4c32f1, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade A, and why

Implement 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.

skills/genesis-implement/SKILL.md · 51 lines

How it starts

The opening of the file, as written. The whole thing — 51 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Implement — One Spec, One Commit, One PR

Implement exactly one micro spec per invocation. The micro spec is the complete instruction set — no task selection, no group management. Write the code/content for the files in its File Operations table, verify against its acceptance criteria, then commit.

Gate: the active group's micro specs are written and the prior phase is accepted. Followed by the A1–A5 audits once the group's specs are all implemented.

Inputs

  • The single target micro spec at .genesis/features/<feature>/micro-specs/{spec-id}.md (the complete instruction set).
  • .genesis/project-state.md (mode), the constitution, northstar.md.
  • approvals/master.json / approvals/group-<N>.json for position.
  • The files listed in the spec's reads interface.

Process

  1. Pre-flight: confirm the feature/group/spec and that the prior phase is accepted; read the target spec in full.
  2. Implement (mode-branched):
    • Greenfield: implement the files in the File Operations table; satisfy every FR/AC; write tests per the constitution.
    • Brownfield: stay strictly within the spec's File Operations table (scope discipline); preserve existing behavior; classify any touched code inherited vs introduced via git blame; ensure no regressions.
    • Lowfield: produce the stage's artifacts per the declared artifact schema; verify the schema validates.
  3. Verify: run the project's build / test / lint commands as declared in the constitution, and confirm the spec's acceptance criteria pass. Do not write outside the spec's File Operations table.
  4. Finalize: one commit scoped to the spec (implement: {spec-id} — {title}), then open one PR. Log any failed approaches to tried.json so they are not retried.

Anti-laziness

What you write runs. No stubs, no TODO, no "simplified version," no narrowing the spec to dodge it. A change is not done at the first file — sweep the blast radius named in the File Operations table (callers, types, tests, configs). If the spec cannot be satisfied as written, stop and surface why — do not ship a partial.

Read the full file on GitHub · 51 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. 10d ago First seen · 51 lines · 40 tokens per session scan A 30792b4c32f1

Subscribe to this mod's changes

Implement is a skill published in the GitHub repository Nagiliant/Genesis-Legacy-V2 (2 stars, last pushed 2mo ago), licensed Apache-2.0. It adds 40 tokens to every session and 643 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.

Related

Other skills, from other repositories

pr-package

Prepare a clean delivery package for GitHub from the real git diff vs an explicit base branch, persisted as PRPACKAGE.md (or PRPACKAGE. .md for multi-repo tasks). Produces branch name, commit messages, fetch, checkout, add, commit, and push commands, PR title and body, and reviewer attention points; never invents work…

Mozurok/fhorja.dev · 216 tokens

branch-commit

Return a branch name and a concise commit message (at most 2 lines) for the current task, grounded in the real git diff rather than a paraphrase of the task summary, and with --apply optionally create that commit after showing it and getting the user's confirmation in the same turn. Use when the user only needs quick…

Mozurok/fhorja.dev · 193 tokens

task-workspace

Provision, report, or attach a dedicated git worktree and branch for the active task on a git-backed project, so multiple tasks run in parallel on one repository without colliding on a single working tree. Opt-in and git-gated: a non-git project or an un-opted task is a no-op. Records the worktree path and task branch…

Mozurok/fhorja.dev · 150 tokens

work-unit-commits

Plan commits as reviewable work units. Trigger: implementation, commit splitting, chained PRs, or keeping tests and docs with code.

Gentleman-Programming/gentle-ai · 33 tokens

polyphony

Multi-agent orchestration with container-isolated workspaces — each agent session runs in its own Docker container with independent git branches.

alinaqi/maggy · 27 tokens

memstack-security-git-guard

Use when the user says 'git-guard', 'check git protection', 'is this repo protected', 'verify gitleaks', 'set up git hooks', 'install git-guard', or wants to confirm a repo blocks secrets and internal files before commit. This is an installer and verifier, NOT a scanner (gitleaks does the actual scanning). Do NOT use…

cwinvestments/memstack · 92 tokens