implementer

implementer is an agent for Claude Code from zeikar/hyperclaude. It costs 276 tokens per session (548 once invoked), scanned A, original, MIT.

An implementation worker that carries out one step from a software development plan. It reads the relevant code, makes the planned change, runs obvious checks, and reports what changed.

In plain words
What is it for?
Use it when a concrete implementation step is ready, such as adding a feature, fixing a bug, or writing a planned test.
Why use it?
It turns an agreed task into a focused code change while limiting unrelated edits. It also provides a basic verification result and change summary.

Agent for Claude Code

Written for Claude Code: shipped in a Claude Code plugin. Also seen: model in frontmatter.

Part of the hyperclaude plugin — 17 skills, 7 agents, 2 hooks shipped together

Good fit Use it when a concrete implementation step is ready, such as adding a feature, fixing a bug, or writing a planned test.

Compare 6 agents from other repositories ↓
Install with agentmods
npx agentmods add agents/zeikar/hyperclaude/implementer
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.

Clone the repo
git clone --depth 1 https://github.com/zeikar/hyperclaude

Made for: Claude Code.

Or install hyperclaude, the plugin that ships this one along with the rest of its 17 skills, 7 agents, 2 hooks.

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 implementer

README.md
[![agentmods](https://agentmods.dev/badge/agents/zeikar/hyperclaude/implementer/github.svg)](https://agentmods.dev/agents/zeikar/hyperclaude/implementer)
Your own site
<a href="https://agentmods.dev/agents/zeikar/hyperclaude/implementer"><img src="https://agentmods.dev/badge/agents/zeikar/hyperclaude/implementer/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 implementer

Your own site · 80×15
<a href="https://agentmods.dev/agents/zeikar/hyperclaude/implementer"><img src="https://agentmods.dev/badge/agents/zeikar/hyperclaude/implementer.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 276 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 548 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 $0.00276 $0.00548
Opus 5.5 $0.00110 $0.00219
Sonnet 5.5 $0.00055 $0.00110
Haiku 4.5 $0.00028 $0.00055

Measured 18d ago against content hash 63180cd162bc, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

implementer 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 18d 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.

agents/implementer.md · 54 lines

What it actually says

You are the implementer agent for hyperclaude. Your job is to take one planned step and make it real in the code.

How you work

  1. Read the relevant files first. Understand context before editing.
  2. If the step has a test, write the failing test first and watch it fail for the right reason.
  3. Make the minimum change that satisfies the step.
  4. Run any obvious verification (linter, the new test).
  5. Report what changed and the diff.

Constraints

  • Stay in the scope of the assigned step. Don't refactor adjacent code unless explicitly asked.
  • No speculative abstractions, unused flexibility, or defensive code for scenarios that can't happen — validate only at real boundaries (user input, external APIs, parse points).
  • Match existing code style. If the project uses tabs, use tabs.
  • Don't commit. Don't push. The orchestrating skill (the lead) commits per task after both reviews pass — never you.
  • If you discover the plan is wrong, stop and report it. Don't silently expand scope.
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. 18d ago Changed 63180cd162bc
  2. 1mo ago First seen · 54 lines · 276 tokens per session scan A 85244bbbbccd

Subscribe to this mod's changes

implementer is an agent published in the GitHub repository zeikar/hyperclaude (4 stars, last pushed 3d ago), licensed MIT. It adds 276 tokens to every session and 548 once invoked, about $0.0011 per session on Opus 5.5. 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.

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