An interactive extension command for an ALBA agent setup. It adds a skill, hook, rule, slash command, or MCP connection, then links the new capability to the agent's configuration.

Use it to add a new agent capability, automate an event, define a behavior rule, create a command, or connect an external service such as Trello, Gmail, or Calendar.

It provides a guided way to expand an agent without manually creating every configuration file and connection.

How onurpolat05/ALBA configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to onurpolat05/ALBA. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file

curl -O https://raw.githubusercontent.com/onurpolat05/ALBA/main/.claude/skills/extend/SKILL.md

Clone the repo

git clone --depth 1 https://github.com/onurpolat05/ALBA

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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/onurpolat05/alba/extend/github.svg)](https://agentmods.dev/skills/onurpolat05/alba/extend)

Your own site

<a href="https://agentmods.dev/skills/onurpolat05/alba/extend"><img src="https://agentmods.dev/badge/skills/onurpolat05/alba/extend/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.

Your own site · 80×15

<a href="https://agentmods.dev/skills/onurpolat05/alba/extend"><img src="https://agentmods.dev/badge/skills/onurpolat05/alba/extend.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 132 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 1,081 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 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.

Model	Per session	Once invoked
Fable 5.1	$0.00132	$0.01081
Opus 5.5	$0.00053	$0.00432
Sonnet 5.5	$0.00026	$0.00216
Haiku 4.5	$0.00013	$0.00108

Measured 1mo ago against content hash e52bc28ef4e6, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

extend 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.

.claude/skills/extend/SKILL.md · 117 lines

How it starts

The opening of the file, as written. The whole thing — 117 lines — stays where its author put it; the contents beside it link to each section on GitHub.

ALBA Extend

Add new capabilities to the agent system. Interactive and collaborative.

Step 1: Identify

Ask: "What would you like to add to your agent?"

Types:

Skill - New capability (research, content creation, task automation...)
Hook - Automated event response (session start, error logging...)
Rule - Behavioral guideline (code standards, communication style...)
Command - Custom /slash command
MCP Integration - Connect external tool (Trello, Gmail, Calendar...)

Step 2: Build

Skills

Understand: What task? What inputs/outputs? What tools?
Check templates/skills/ for existing templates

Create .claude/skills/[name]/SKILL.md with frontmatter:

---
name: [skill-name]
description: [what it does]. Use when user says "x", "y". Do NOT use for [z].
context: fork          # fork = subagent (protects context), inline = main context
background: false      # fork only: wait for the result in this turn (fork defaults to background)
allowed-tools: [tools]
---

The description is the only field that decides whether the skill fires at the right moment — a bare one-line summary will not trigger reliably. Full field reference: templates/skills/SKILL-TEMPLATE.md.

Add to CLAUDE.md Skills table
Test immediately

Hooks

Identify the event. Common ones: SessionStart, UserPromptSubmit, PreToolUse, PostToolUse, PostToolUseFailure, Stop, SubagentStop, PreCompact, PostCompact, SessionEnd. Claude Code v2.1.220 defines 30 events — see templates/hooks/README-hooks.md for the full list and each one's output contract.
Define what should happen when triggered
Create .claude/hooks/[name].sh and make executable (chmod +x)
Add to .claude/settings.json — note the nested hooks array; skipping the inner level is the most common reason a newly added hook never runs:
```
{
  "hooks": {
    "[EventType]": [
      {
        "matcher": "Bash",
        "hooks": [
          {
            "type": "command",
            "command": "${CLAUDE_PROJECT_DIR}/.claude/hooks/[name].sh",
            "timeout": 5
          }
        ]
      }
    ]
  }
}
```
matcher only applies to tool events. Use ${CLAUDE_PROJECT_DIR} rather than a relative path, or the hook breaks for sessions started from a subdirectory.
Test by triggering the event

Read the full file on GitHub · 117 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.

1mo ago First seen · 117 lines · 132 tokens per session scan A e52bc28ef4e6

Subscribe to this mod's changes

extend is a skill published in the GitHub repository onurpolat05/ALBA (23 stars, last pushed 3mo ago), licensed MIT. It adds 132 tokens to every session and 1,081 once invoked, about $0.0005 per session on Opus 5.5. 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 2026-08-30.

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