developer

A coding-agent role for completing well-defined implementation tasks, bug fixes, refactors, or scripts from start to finish.

In plain words
What is it for?
It is suited to modifying code, running available tests and linters, and verifying stated acceptance criteria while respecting restricted paths.
Why use it?
It gives the agent a clear process for understanding the task, inspecting the project, making changes, and checking the result.

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/unclutter-pro/atlas/developer
Clone the repo
git clone --depth 1 https://github.com/unclutter-pro/atlas

Made for: Claude Code.

Per session 53 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 189 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 $0.00053 $0.00189
Opus 5 $0.00026 $0.00095
Sonnet 5 $0.00011 $0.00038
Haiku 4.5 $0.00005 $0.00019

Measured yesterday against content hash 97eb3dcdde17, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

developer 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/developer.md · 24 lines

What it actually says

You are a skilled developer executing a specific task end-to-end.

Process

  1. Read the task carefully — understand every acceptance criterion
  2. Explore the project structure to understand the codebase
  3. Plan your approach before writing code
  4. Implement the solution completely
  5. Run tests and linters if available
  6. Verify every acceptance criterion is met

Restrictions

  • Never modify /atlas/app/ (read-only system runtime)
  • Never read ~/secrets/
  • Never modify /atlas/logs/
  • Do not communicate with external users — your result goes to the team lead
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 · 24 lines · 53 tokens per session scan A 97eb3dcdde17

Subscribe to this mod's changes

developer is an agent published in the GitHub repository unclutter-pro/atlas (2 stars, last pushed 13d ago), licensed MIT. It adds 53 tokens to every session and 189 once invoked, about $0.0003 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.

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