ha-yaml-automations

ha-yaml-automations is a skill for Claude Code from L3DigitalNet/Claude-Code-Plugins. It costs 39 tokens per session (1,181 once invoked), scanned A, original, MIT.

A guide for writing Home Assistant automations in YAML, a text format for configuration. It covers triggers, conditions, actions, formatting, and run modes.

In plain words
What is it for?
Use it to create or fix automations such as turning on a light when a sensor changes, including rules for repeated triggers.
Why use it?
It helps avoid invalid YAML and unclear automation logic when an automation starts, checks conditions, and performs actions.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

Part of the home-assistant-dev plugin — 27 skills, 2 commands, 3 agents, 1 hook shipped together

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/l3digitalnet/claude-code-plugins/ha-yaml-automations
Any agent
npx skills add L3DigitalNet/Claude-Code-Plugins --skill ha-yaml-automations
Clone the repo
git clone --depth 1 https://github.com/L3DigitalNet/Claude-Code-Plugins

Made for: Claude Code.

Or install home-assistant-dev, the plugin that ships this one along with the rest of its 27 skills, 2 commands, 3 agents, 1 hook.

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 ha-yaml-automations

README.md
[![agentmods](https://agentmods.dev/badge/skills/l3digitalnet/claude-code-plugins/ha-yaml-automations.svg)](https://agentmods.dev/skills/l3digitalnet/claude-code-plugins/ha-yaml-automations)
Your own site
<a href="https://agentmods.dev/skills/l3digitalnet/claude-code-plugins/ha-yaml-automations"><img src="https://agentmods.dev/badge/skills/l3digitalnet/claude-code-plugins/ha-yaml-automations.svg" alt="Measured on agentmods" height="20"></a>
Per session 39 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,181 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 5.1 $0.00039 $0.01181
Opus 5 $0.00019 $0.00590
Sonnet 5 $0.00008 $0.00236
Haiku 4.5 $0.00004 $0.00118

Measured 5d ago against content hash 72992efde0cc, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-05, from the pricing page.

Security

Grade A, and why

ha-yaml-automations 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 5d 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.

plugins/home-assistant-dev/skills/ha-yaml-automations/SKILL.md · 181 lines

How it starts

The opening of the file, as written. The whole thing — 181 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Home Assistant YAML Automations

YAML Style Rules

  • 2-space indentation (never tabs)
  • Lowercase booleans: true / false
  • Entity IDs: domain.entity_name (lowercase, underscores)

Automation Template

automation:
  - id: 'unique_automation_id'
    alias: 'Descriptive Name'
    description: 'What this does'
    mode: single # see Run Modes below; defaults to single if omitted
    triggers:
      - trigger: state
        entity_id: binary_sensor.front_door
        to: 'on'
    conditions:
      - condition: time
        after: '08:00:00'
        before: '22:00:00'
    actions:
      - action: light.turn_on
        target:
          entity_id: light.hallway
        data:
          brightness_pct: 100

Run Modes

mode: controls what happens when the automation is triggered again while a previous run is still going. Omitting it defaults to single.

  • single — ignore the new trigger; the in-progress run continues uninterrupted (default).
  • restart — cancel the running run and start over from the top.
  • queued — run sequentially; each new trigger waits in line and runs after the previous one finishes.
  • parallel — run concurrently; each trigger starts its own run immediately.

Common Triggers

# State
- trigger: state
  entity_id: sensor.temperature
  above: 25

# Time
- trigger: time
  at: '07:30:00'

# Sun
- trigger: sun
  event: sunset
  offset: '-00:30:00'

# Template
- trigger: template
  value_template: "{{ states('sensor.power') | float > 1000 }}"

# Webhook
- trigger: webhook
  webhook_id: 'my_unique_webhook_id'
  allowed_methods: [POST]

Common Conditions

# State
- condition: state
  entity_id: alarm_control_panel.home
  state: 'armed_away'

# Numeric
- condition: numeric_state
  entity_id: sensor.temperature
  above: 20
  below: 30

# Time
- condition: time
  after: '08:00:00'
  before: '23:00:00'
  weekday: [mon, tue, wed, thu, fri]

# Template
- condition: template
  value_template: "{{ is_state('person.john', 'home') }}"

# AND/OR
- condition: and
  conditions:
    - condition: state
      entity_id: input_boolean.guest_mode
      state: 'off'
    - condition: state
      entity_id: binary_sensor.motion
      state: 'on'

Read the full file on GitHub · 181 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. 5d ago First seen · 181 lines · 39 tokens per session scan A 72992efde0cc

Subscribe to this mod's changes

ha-yaml-automations is a skill published in the GitHub repository L3DigitalNet/Claude-Code-Plugins (6 stars, last pushed 5d ago), licensed MIT. It adds 39 tokens to every session and 1,181 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.

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