A coding agent that makes a clearly defined change in specified files, then runs a requested test, type check, or build. It stops and reports the issue when the task needs a decision.

It is for carrying out mechanical code changes and reporting the changed files, validation result, and risks.

It keeps routine implementation work bounded, avoids unrelated edits, and records whether the requested check passed.

implementer — Agent for Claude Code by Sagargupta16

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/Sagargupta16/claude-cost-optimizer

Made for: Claude Code.

Or install claude-cost-optimizer, the plugin that ships this one along with the rest of its 1 skill, 4 commands, 3 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.

README.md

[![agentmods](https://agentmods.dev/badge/agents/sagargupta16/claude-cost-optimizer/implementer/github.svg)](https://agentmods.dev/agents/sagargupta16/claude-cost-optimizer/implementer)

Your own site

<a href="https://agentmods.dev/agents/sagargupta16/claude-cost-optimizer/implementer"><img src="https://agentmods.dev/badge/agents/sagargupta16/claude-cost-optimizer/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.

Your own site · 80×15

<a href="https://agentmods.dev/agents/sagargupta16/claude-cost-optimizer/implementer"><img src="https://agentmods.dev/badge/agents/sagargupta16/claude-cost-optimizer/implementer.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 54 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.

When invoked 450 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.

Model	Per session	Once invoked
Fable 5.1	$0.00054	$0.00450
Opus 5.5	$0.00022	$0.00180
Sonnet 5.5	$0.00011	$0.00090
Haiku 4.5	$0.00005	$0.00045

Measured 3d ago against content hash ded06e92a528, 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 3d 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.

templates/agents/implementer.md · 31 lines

What it actually says

You are an implementer. Make the change you were given, in the files you were given, and nothing more.

Read only what the change needs. Edit in place. When the change is done, run the check you were told to run (tests, type check or build) and read its result.

Do not commit, push or touch files you were not pointed at. If the task turns out to need a decision, stop and report it instead of guessing.

Return exactly these four lines:

Outcome: done, partial or blocked, with one sentence on why Files changed: paths, comma separated Validation: the command you ran and its result Risks: anything the caller should check, or none

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.

3d ago First seen · 31 lines · 54 tokens per session scan A ded06e92a528

Subscribe to this mod's changes

implementer is an agent published in the GitHub repository Sagargupta16/claude-cost-optimizer (44 stars, last pushed 3d ago), licensed MIT. It adds 54 tokens to every session and 450 once invoked, about $0.0002 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 2026-11-04.

Building agents Cost Optimization ai-coding anthropic best-practices claude

implementer next to 6 agents from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
implementerSagargupta16/claude-cost-optimizer	Agent	44	3d ago	MIT	A	54	Claude Code
guide-reviewerFlorianBruniaux/claude-code-ultimate-guide	Agent	6.4k	2d ago	CC-BY-SA-4.0	A	61	Claude Code
whitepaper-journalistFlorianBruniaux/claude-code-ultimate-guide	Agent	6.4k	2d ago	CC-BY-SA-4.0	A	41	Claude Code
claude-code-guideFlorianBruniaux/claude-code-ultimate-guide	Agent	6.4k	2d ago	CC-BY-SA-4.0	A	52	Claude Code
whitepaper-coherenceFlorianBruniaux/claude-code-ultimate-guide	Agent	6.4k	2d ago	CC-BY-SA-4.0	A	39	Claude Code
whitepaper-densityFlorianBruniaux/claude-code-ultimate-guide	Agent	6.4k	2d ago	CC-BY-SA-4.0	A	45	Claude Code
evidence-reviewerFlorianBruniaux/claude-code-ultimate-guide	Agent	6.4k	2d ago	CC-BY-SA-4.0	A	20	Claude Code