A coding agent that implements a completed task description from a Markdown file. It follows the stated design, writes code and tests, and does not choose the approach.

Implementing planned changes and adding their tests from a written task.

It keeps implementation separate from architectural decisions. Use it when the solution is already agreed and documented.

middle-dev — Agent for Claude Code by kamiletar/letar

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/kamiletar/letar

Made for: Claude Code.

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/kamiletar/letar/middle-dev/github.svg)](https://agentmods.dev/agents/kamiletar/letar/middle-dev)

Your own site

<a href="https://agentmods.dev/agents/kamiletar/letar/middle-dev"><img src="https://agentmods.dev/badge/agents/kamiletar/letar/middle-dev/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/kamiletar/letar/middle-dev"><img src="https://agentmods.dev/badge/agents/kamiletar/letar/middle-dev.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 61 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.

When invoked 99 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 unknown 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	$0.00061	$0.00099
Opus 5.5	$0.00024	$0.00040
Sonnet 5.5	$0.00012	$0.00020
Haiku 4.5	$0.00006	$0.00010

Measured yesterday against content hash 831349a4bf1b, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

middle-dev 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/middle-dev.md · 11 lines

The source is not reproduced here

A licence we could not identify

The repository carries a LICENSE file, but it is custom or dual enough that GitHub cannot name it and neither can this catalogue. Unknown terms are not permission, so the body is not copied here. Read the licence at the source and decide for yourself.

Read it on GitHub

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.

yesterday First seen · 11 lines · 61 tokens per session scan A 831349a4bf1b

Subscribe to this mod's changes

middle-dev is an agent published in the GitHub repository kamiletar/letar (5 stars, last pushed 10d ago), with no licence file. It adds 61 tokens to every session and 99 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 2026-11-07.

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middle-dev next to 6 agents from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
middle-devkamiletar/letar	Agent	5	10d ago	none	A	61	Claude Code
evidence-cohort-teacherselftune-dev/selftune	Agent	18	5d ago	MIT	A	26	Claude Code
plannerAcheron-AI/angular-upgrade-kit	Agent	1	1mo ago	MIT	A	38	Claude Code
playwright-test-generatormicrosoft/playwright	Agent	99k	today	Apache-2.0	A	151	Claude Code
.NET-Notebook-Migration-Agentmicrosoft/ai-agents-for-beginners	Agent	79k	today	MIT	A	33	Claude Code
AVM Owner Triagegithub/awesome-copilot	Agent	41k	yesterday	MIT	A	61	Claude Code
Ultimate Transparent Thinking Beast Modegithub/awesome-copilot	Agent	41k	yesterday	MIT	A	11	Claude Code