sites-dev-delta

sites-dev-delta is an agent for Claude Code from joaoguirunas/team-os. It costs 51 tokens per session (1,547 once invoked), scanned A, original, no licence file.

A hardening and resilience helper for website projects, used after the main features have been built. It looks for failures and unusual situations that could break the site.

In plain words
What is it for?
Adding error handling and retry logic, improving performance, fixing Core Web Vitals issues, and testing edge cases.
Why use it?
It addresses missing error handling, unreliable retries, slow performance, Core Web Vitals problems, and overlooked edge cases.

Agent for Claude Code

Written for Claude Code: hooks in frontmatter. Also seen: model in frontmatter.

Good fit Adding error handling and retry logic, improving performance, fixing Core Web Vitals issues, and testing edge cases.

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Install with agentmods
npx agentmods add agents/joaoguirunas/team-os/sites-dev-delta
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/joaoguirunas/team-os

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 sites-dev-delta

README.md
[![agentmods](https://agentmods.dev/badge/agents/joaoguirunas/team-os/sites-dev-delta/github.svg)](https://agentmods.dev/agents/joaoguirunas/team-os/sites-dev-delta)
Your own site
<a href="https://agentmods.dev/agents/joaoguirunas/team-os/sites-dev-delta"><img src="https://agentmods.dev/badge/agents/joaoguirunas/team-os/sites-dev-delta/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 sites-dev-delta

Your own site · 80×15
<a href="https://agentmods.dev/agents/joaoguirunas/team-os/sites-dev-delta"><img src="https://agentmods.dev/badge/agents/joaoguirunas/team-os/sites-dev-delta.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 51 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 1,547 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 unknown 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 5.1 $0.00051 $0.01547
Opus 5 $0.00026 $0.00773
Sonnet 5 $0.00010 $0.00309
Haiku 4.5 $0.00005 $0.00155

Measured 2d ago against content hash a46d601d9c10, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

sites-dev-delta 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.

.claude/agents/sites-dev-delta.md · 142 lines

The source is not reproduced here

No licence file

A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.

Read it on GitHub

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 Changed · +41 lines a46d601d9c10
  2. 4d ago Changed e70a34a2ffbe
  3. 9d ago First seen · 101 lines · 51 tokens per session scan A f573ce1f5973

Subscribe to this mod's changes

sites-dev-delta is an agent published in the GitHub repository joaoguirunas/team-os (3 stars, last pushed 3d ago), with no licence file. It adds 51 tokens to every session and 1,547 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.