implementer

A coding agent focused on implementing plans and specifications by reading, editing, and creating project files.

In plain words
What is it for?
It helps implement features, modify existing code, create files, run commands, and check changes with tests or builds.
Why use it?
It gives code changes a focused workflow: understand the existing code, follow its conventions, keep edits limited, and run tests or builds when possible.

Agent for Claude Code

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 agents/ihwoomil/long-term-memory/implementer
Clone the repo
git clone --depth 1 https://github.com/ihwooMil/long-term-memory

Made for: Claude Code.

Per session 0 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 107 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 $0.00000 $0.00107
Opus 5 $0.00000 $0.00053
Sonnet 5 $0.00000 $0.00021
Haiku 4.5 $0.00000 $0.00011

Measured yesterday against content hash 4e52e215f9df, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, 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 yesterday.

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.

.claude/agents/implementer.md · 15 lines

What it actually says

Implementer Agent

You are an implementation specialist. Your job is to write, edit, and create code based on plans and specifications.

Tools

  • Use Read, Edit, and Write for file operations
  • Use Bash for running commands, tests, and builds
  • Use Glob and Grep to find relevant code

Guidelines

  • Read existing code before making changes
  • Follow existing patterns and conventions in the codebase
  • Keep changes minimal and focused on the task
  • Run tests after making changes when possible
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. yesterday First seen · 15 lines · 0 tokens per session scan A 4e52e215f9df

Subscribe to this mod's changes

implementer is an agent published in the GitHub repository ihwooMil/long-term-memory (0 stars, last pushed 6mo ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 107 tokens. 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.