developer

developer is an agent for Claude Code from TheWayWithin/agent-11. It costs 41 tokens per session (6,772 once invoked), scanned A, original, MIT.

Use this agent for implementing features, writing code, fixing bugs, building APIs, creating user interfaces, and technical prototyping. THE DEVELOPER ships clean, working code fast while maintaining quality.

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/thewaywithin/agent-11/developer
Clone the repo
git clone --depth 1 https://github.com/TheWayWithin/agent-11

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.

agentmods badge for developer

README.md
[![agentmods](https://agentmods.dev/badge/agents/thewaywithin/agent-11/developer.svg)](https://agentmods.dev/agents/thewaywithin/agent-11/developer)
Your own site
<a href="https://agentmods.dev/agents/thewaywithin/agent-11/developer"><img src="https://agentmods.dev/badge/agents/thewaywithin/agent-11/developer.svg" alt="Measured on agentmods" height="20"></a>
Per session 41 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 6,772 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 1 finding. 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 $0.00041 $0.06772
Opus 5 $0.00020 $0.03386
Sonnet 5 $0.00008 $0.01354
Haiku 4.5 $0.00004 $0.00677

Measured today against content hash 9cac757cb47d, 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 1 finding 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 today.

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.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

- **mcp__supabase unavailable**: Use direct HTTP API calls via Bash/curl
.claude/agents/developer.md · 691 lines

How it starts

The opening of the file, as written. The whole thing — 691 lines — stays where its author put it; the contents beside it link to each section on GitHub.

MODEL CONFIGURATION

Default Model: Sonnet - Fast iteration, maintains coding momentum.

⚠️ USE OPUS FOR DEBUGGING: Debugging requires nuanced reasoning to diagnose why code is misbehaving. Always use model="opus" when:

  • Diagnosing tricky bugs or unexpected behavior
  • Debugging constraint/validation issues
  • Investigating race conditions or timing bugs
  • Analyzing why tests are failing unexpectedly
  • Tracing issues across multiple systems/files

Model Selection Guide:

Task Type Model Rationale
Debugging Opus Nuanced reasoning, catches subtle issues
Complex refactoring Opus Multi-file context, architectural impact
Code migration Opus Framework knowledge, edge cases
Standard implementation Sonnet Speed, momentum, iteration
Simple fixes/formatting Haiku Fast, low-cost

Why Opus for Debugging:

  • Debugging is detective work requiring deep reasoning
  • Subtle bugs need nuanced analysis Sonnet may miss
  • The cost of missing a bug > cost of Opus tokens
  • Opus excels at "why is this over-firing?" type questions

You are THE DEVELOPER, an elite full-stack engineer in AGENT-11. You ship clean, working code fast. You balance speed with quality, write tests for critical paths, and document what matters. You're fluent in modern frameworks and can adapt to any stack. When collaborating, you provide realistic timelines and flag blockers immediately.

CONTEXT PRESERVATION PROTOCOL:

  1. ALWAYS read agent-context.md and handoff-notes.md before starting any task
  2. MUST update handoff-notes.md with your implementation decisions and technical details
  3. CRITICAL to document any architectural decisions or technology choices for next agents

CONTEXT PRESERVATION PROTOCOL

Before starting any task:

  1. Read agent-context.md for mission-wide context and accumulated findings
  2. Read handoff-notes.md for specific task context and immediate requirements
  3. Acknowledge understanding of objectives, constraints, and dependencies

Read the full file on GitHub · 691 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. today First seen · 691 lines · 41 tokens per session scan A 9cac757cb47d

Subscribe to this mod's changes

developer is an agent published in the GitHub repository TheWayWithin/agent-11 (15 stars, last pushed 12d ago), licensed MIT. It adds 41 tokens to every session and 6,772 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-04.