subagent-dev

A workflow for carrying out a plan through separate helper agents, with review after each independent task. Independent tasks can be worked on in isolation and checked before the final verification.

In plain words
What is it for?
Executing multi-task development plans, assigning implementation and review work to helper agents, tracking blocked or completed tasks, and running the final tests.
Why use it?
It separates coordination, implementation, and review so parallel work is easier to control and mistakes are caught before completion.

Skill for Claude CodeCodex

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 skills/huzaifa525/claude-code-optimizer/subagent-dev
Any agent
npx skills add huzaifa525/claude-code-optimizer --skill subagent-dev
Clone the repo
git clone --depth 1 https://github.com/huzaifa525/claude-code-optimizer

Made for: Claude Code, Codex.

Per session 30 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 867 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 $0.00030 $0.00867
Opus 5 $0.00015 $0.00434
Sonnet 5 $0.00006 $0.00173
Haiku 4.5 $0.00003 $0.00087

Measured 2d ago against content hash 2b7d64e3467f, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

subagent-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 2d 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/.claude/skills/subagent-dev/SKILL.md · 124 lines

How it starts

The opening of the file, as written. The whole thing — 124 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Execute a plan using subagent-driven development for: $ARGUMENTS

Iron Law

The controller coordinates. Subagents implement. Never mix roles.

The controller agent (you) MUST NOT write production code directly. You dispatch subagents for each task, review their work, and coordinate the overall plan.

Architecture

Controller (you)
  ├── Read the plan
  ├── For each task:
  │   ├── Dispatch Implementer subagent (fresh context)
  │   ├── Dispatch Spec Reviewer subagent
  │   ├── Dispatch Quality Reviewer subagent
  │   └── Handle status (DONE / CONCERNS / BLOCKED)
  └── Verify all tests pass at the end

Steps

1. Load the Plan

Read task_plan.md or the user's task list. Extract all tasks with:

  • Task description
  • Files involved
  • Dependencies (what must complete first)
  • Acceptance criteria

2. Execute Each Task

For each task (respecting dependency order):

A. Dispatch Implementer

Launch a subagent with Agent tool:

Prompt: "Implement [task description].
Files to modify: [list]
Pattern to follow: [reference file]
Acceptance criteria: [criteria]
Run tests after implementation."

Use model: "sonnet" for mechanical tasks, model: "opus" for complex architecture.

B. Check Implementer Status

The implementer should report one of:

Status Meaning Action
DONE Task complete, tests pass Proceed to review
DONE_WITH_CONCERNS Complete but has questions Review concerns, decide if acceptable
NEEDS_CONTEXT Missing information to proceed Provide context, re-dispatch
BLOCKED Cannot complete (dependency, bug) Log blocker, skip to next task
C. Two-Stage Review

Stage 1 — Spec Compliance (must pass first):

  • Does the implementation match the task description?
  • Are all acceptance criteria met?
  • Were the correct files modified?

Stage 2 — Code Quality (only after Stage 1 passes):

  • Does it follow existing codebase patterns?
  • Are there security issues?
  • Is the code clean and maintainable?

Read the full file on GitHub · 124 lines

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. 2d ago First seen · 124 lines · 30 tokens per session scan A 2b7d64e3467f

Subscribe to this mod's changes

subagent-dev is a skill published in the GitHub repository huzaifa525/claude-code-optimizer (9 stars, last pushed 5mo ago), licensed MIT. It adds 30 tokens to every session and 867 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.