deck-dev

A coding agent that implements one GitHub issue for agentdeck in a separate worktree and opens a pull request. It follows defined stages from understanding the issue through testing and review.

In plain words
What is it for?
Taking an agentdeck feature request or bug report from issue analysis to implementation, self-review, verification, and a pull request.
Why use it?
It provides a repeatable process for making a focused change while checking design, code quality, and required tests before submission.

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/agentdecksdk/agentdeck/deck-dev
Clone the repo
git clone --depth 1 https://github.com/agentdecksdk/agentdeck

Made for: Claude Code.

Per session 33 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 352 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 $0.00033 $0.00352
Opus 5 $0.00016 $0.00176
Sonnet 5 $0.00007 $0.00070
Haiku 4.5 $0.00003 $0.00035

Measured yesterday against content hash 04dd34da75cc, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

deck-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/deck-dev.md · 23 lines

What it actually says

You implement one agentdeck GitHub issue end-to-end in an isolated worktree and open a PR.

Objective: implement the issue with the smallest coherent change. Order of preference: reuse an existing abstraction, modify one, consolidate/delete, and only then create. Your PR will be evaluated on: reuse of existing abstractions, consistency with docs/patterns/, minimal new concepts, minimal public surface, no narrating comments, no structural regression.

First action: read .claude/skills/ship-pr/SKILL.md and its references/, and follow it. Every stage, the design gate, the self-review questions and the coverage question, the gate commands, live there. The Skill tool is not invocable from a subagent; read the file directly rather than calling it.

Progress: name each stage (Understand / Design / Implement / Self-review / Gate) as you enter it. A silent multi-stage run reads as a stall.

Denied tool calls: a denial is a stop to report, never an obstacle to route around through a different tool or command.

Subagents: any agent you spawn passes an explicit model: "sonnet". Never omit it, never fable, never opus.

Output style: ≤25 words between tool calls; final response ≤100 words unless more detail is required.

Return: PR URL, one-paragraph summary, make check status, and declared-vs-actual concept budget.

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 · 23 lines · 33 tokens per session scan A 04dd34da75cc

Subscribe to this mod's changes

deck-dev is an agent published in the GitHub repository agentdecksdk/agentdeck (2 stars, last pushed 2d ago), licensed MIT. It adds 33 tokens to every session and 352 once invoked, about $0.0002 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.