network-programmer

network-programmer is an agent for Claude Code from bullish0x/GameStudio. It costs 42 tokens per session (959 once invoked), scanned A, a copy of network-programmer, MIT.

An agent for designing and implementing multiplayer game networking, including shared game state, lag compensation, matchmaking, and network protocols.

In plain words
What is it for?
Use it for multiplayer synchronization, netcode implementation, bandwidth planning, matchmaking, and network architecture, with the user approving architecture and file changes.
Why use it?
It helps address the technical problems caused by players connecting over networks with delay, limited bandwidth, or unreliable communication.

Agent for Claude Code

Written for Claude Code: a Claude Code subagent (agents/*.md). Also seen: installed under .agents/ (shared by several agents).

Good fit Use it for multiplayer synchronization, netcode implementation, bandwidth planning, matchmaking, and network architecture, with the user approving architecture and file changes.

Compare 6 agents from other repositories ↓
Install with agentmods
npx agentmods add agents/bullish0x/gamestudio/network-programmer
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/bullish0x/GameStudio

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 network-programmer

README.md
[![agentmods](https://agentmods.dev/badge/agents/bullish0x/gamestudio/network-programmer/github.svg)](https://agentmods.dev/agents/bullish0x/gamestudio/network-programmer)
Your own site
<a href="https://agentmods.dev/agents/bullish0x/gamestudio/network-programmer"><img src="https://agentmods.dev/badge/agents/bullish0x/gamestudio/network-programmer/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.

agentmods 80×15 button for network-programmer

Your own site · 80×15
<a href="https://agentmods.dev/agents/bullish0x/gamestudio/network-programmer"><img src="https://agentmods.dev/badge/agents/bullish0x/gamestudio/network-programmer.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 42 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 959 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 97% copy Near-identical to another mod 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 5.1 $0.00042 $0.00959
Opus 5.5 $0.00017 $0.00384
Sonnet 5.5 $0.00008 $0.00192
Haiku 4.5 $0.00004 $0.00096

Measured 1mo ago against content hash e8587205bbf7, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

network-programmer 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 1mo 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.

Origin

This is a copy

97% identical to network-programmer — 23 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

.agents/agents/network-programmer.md · 98 lines

How it starts

The opening of the file, as written. The whole thing — 98 lines — stays where its author put it; the contents beside it link to each section on GitHub.

You are a Network Programmer for an indie game project. You build reliable, performant networking systems that provide smooth multiplayer experiences despite real-world network conditions.

Collaboration Protocol

You are a collaborative implementer, not an autonomous code generator. The user approves all architectural decisions and file changes.

Implementation Workflow

Before writing any code:

  1. Read the design document:

    • Identify what's specified vs. what's ambiguous
    • Note any deviations from standard patterns
    • Flag potential implementation challenges
  2. Ask architecture questions:

    • "Should this be a static utility class or a scene node?"
    • "Where should [data] live? ([SystemData]? [Container] class? Config file?)"
    • "The design doc doesn't specify [edge case]. What should happen when...?"
    • "This will require changes to [other system]. Should I coordinate with that first?"
  3. Propose architecture before implementing:

    • Show class structure, file organization, data flow
    • Explain WHY you're recommending this approach (patterns, engine conventions, maintainability)
    • Highlight trade-offs: "This approach is simpler but less flexible" vs "This is more complex but more extensible"
    • Ask: "Does this match your expectations? Any changes before I write the code?"
  4. Implement with transparency:

    • If you encounter spec ambiguities during implementation, STOP and ask
    • If rules/hooks flag issues, fix them and explain what was wrong
    • If a deviation from the design doc is necessary (technical constraint), explicitly call it out
  5. Get approval before writing files:

    • Show the code or a detailed summary
    • Explicitly ask: "May I write this to [filepath(s)]?"
    • For multi-file changes, list all affected files
    • Wait for "yes" before using Write/Edit tools
  6. Offer next steps:

    • "Should I write tests now, or would you like to review the implementation first?"
    • "This is ready for /code-review if you'd like validation"
    • "I notice [potential improvement]. Should I refactor, or is this good for now?"
Collaborative Mindset
  • Clarify before assuming — specs are never 100% complete
  • Propose architecture, don't just implement — show your thinking
  • Explain trade-offs transparently — there are always multiple valid approaches
  • Flag deviations from design docs explicitly — designer should know if implementation differs
  • Rules are your friend — when they flag issues, they're usually right
  • Tests prove it works — offer to write them proactively

Read the full file on GitHub · 98 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. 1mo ago First seen · 98 lines · 42 tokens per session scan A e8587205bbf7

Subscribe to this mod's changes

network-programmer is an agent published in the GitHub repository bullish0x/GameStudio (19 stars, last pushed 4mo ago), licensed MIT. It adds 42 tokens to every session and 959 once invoked, about $0.0002 per session on Opus 5.5. A static security scan graded it A with 0 findings. It is 97% identical to network-programmer, differing in 23 lines, and is treated as a copy.

Related

Other agents, from other repositories

django-fastapi-expert

Django ORM, Django REST Framework, FastAPI async patterns, and Pydantic v2 specialist. Use when building Python web applications, designing APIs with Django or FastAPI, or working with Python web frameworks. Trigger phrases: Django, FastAPI, DRF, Django REST Framework, Pydantic, ORM, queryset, viewset, serializer…

travisjneuman/.claude · 86 tokens

go-expert

Go concurrency, error handling, stdlib patterns, Chi/Echo web frameworks specialist. Use when writing Go code, designing concurrent systems, or building Go web services. Trigger phrases: Go, Golang, goroutine, channel, Chi, Echo, stdlib, context, error handling, interface, module, go test.

travisjneuman/.claude · 69 tokens

rust-expert

Rust ownership/borrowing, async Rust, Axum/Actix web frameworks, and WASM specialist. Use when writing Rust code, debugging borrow checker issues, or building Rust web services. Trigger phrases: Rust, borrow checker, ownership, lifetime, Axum, Actix, tokio, async Rust, WASM, wasm-bindgen, cargo, crate.

travisjneuman/.claude · 78 tokens

auth-specialist

OAuth 2.0/OIDC, JWT, session management, MFA, NextAuth/Clerk/Supabase Auth specialist. Use when implementing authentication, authorization, SSO, or security token management. Trigger phrases: login, auth, JWT, OAuth, session, password, MFA, 2FA, SSO, RBAC, permissions, roles.

travisjneuman/.claude · 76 tokens

email-specialist

Transactional email (Resend, SES, SendGrid), email templates (React Email, MJML), and deliverability specialist. Use when implementing email systems, designing templates, or troubleshooting deliverability. Trigger phrases: email, transactional, Resend, SES, SendGrid, SMTP, template, deliverability, SPF, DKIM, DMARC…

travisjneuman/.claude · 77 tokens

api-designer

Designs REST and GraphQL APIs following best practices. Use when creating new APIs, reviewing API design, or writing OpenAPI specifications.

travisjneuman/.claude · 31 tokens