What is ha-backup-platform-add?

A guide for adding one backup-related feature to an existing Home Assistant custom integration. Home Assistant is software for controlling and automating smart-home devices; the feature can run before and after backups or provide a backup agent.

Use it to add pre- and post-backup pause/resume hooks or a registered backup agent to a Home Assistant integration.

It helps integrations protect database-writing or other stateful work while a backup runs, or provide backup storage when the integration manages storage. It also keeps the added code aligned with the stated Home Assistant specification.

ha-backup-platform-add — Skill for Claude Code by nolte

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.

Any agent

npx skills add nolte/claude-home-assistant --skill ha-backup-platform-add

Clone the repo

git clone --depth 1 https://github.com/nolte/claude-home-assistant

Made for: Claude Code.

Or install claude-home-assistant, the plugin that ships this one along with the rest of its 45 skills, 11 agents.

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/nolte/claude-home-assistant/ha-backup-platform-add/github.svg)](https://agentmods.dev/skills/nolte/claude-home-assistant/ha-backup-platform-add)

Your own site

<a href="https://agentmods.dev/skills/nolte/claude-home-assistant/ha-backup-platform-add"><img src="https://agentmods.dev/badge/skills/nolte/claude-home-assistant/ha-backup-platform-add/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/nolte/claude-home-assistant/ha-backup-platform-add"><img src="https://agentmods.dev/badge/skills/nolte/claude-home-assistant/ha-backup-platform-add.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 194 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 1,844 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	$0.00194	$0.01844
Opus 5	$0.00097	$0.00922
Sonnet 5	$0.00039	$0.00369
Haiku 4.5	$0.00019	$0.00184

Measured 10d ago against content hash 2113e0cd380f, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

ha-backup-platform-add 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 10d 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.

skills/ha-backup-platform-add/SKILL.md · 105 lines

How it starts

The opening of the file, as written. The whole thing — 105 lines — stays where its author put it; the contents beside it link to each section on GitHub.

HA Backup Platform Add

Spec: spec/claude/ha-backup-platform-add/en.md (EN canonical) / spec/claude/ha-backup-platform-add/de.md (DE translation).

Why this is a skill, not an agent

Human-visible augmentation surface — the user describes the integration type and reads back the backup.py module and the conformance report; a skill keeps this on the visible command surface, like the sibling augment skills (ha-config-flow-augment, ha-coordinator-add, ha-repairs-add, ha-device-automation-add).
Mid-flow interactivity — the hooks-vs-agent disambiguation is a per-run dialogue the user approves before generation.
Bounded, inline generation — one platform module (the two hook functions, or the agent class plus its registration) fits inline; no isolated agent context is needed.
Counter-dimension considered: the draft→validate loop could be an agent, but the surface decision belongs in the user's working context; skill wins.

When this skill activates

Use this skill to add one backup-platform surface — pre/post backup hooks (for DB-writing or stateful integrations) or a backup agent (for storage-providing integrations) — to an existing integration via its backup.py platform module.

When NOT to activate

greenfield integration scaffolding → ha-integration-scaffold
the sibling diagnostics platform module → ha-diagnostics-augment
backup encryption, retention, scheduling, or restore orchestration → owned by the backup manager / HA core, out of scope
deploying/importing into a running HA instance → out of scope

Hard rules

One surface, one run. Either pre/post hooks or a backup agent — no combined batch.
Read spec/ha/backup-platform/en.md first. Do not generate from memory.
Disambiguate the surface. Stateful / DB-writing integration → pre/post hooks; storage-providing (cloud-storage) integration → backup agent. When both apply, have the user pick the one this run augments.
Hooks contract. async_pre_backup(hass: HomeAssistant) -> None and async_post_backup(hass: HomeAssistant) -> None are top-level async functions; whatever async_pre_backup pauses, async_post_backup resumes.
Agent registration. async_get_backup_agents(hass) returns list[BackupAgent] and must return [] when no loaded config entry exists for the domain (hass.config_entries.async_loaded_entries(DOMAIN)). async_register_backup_agents_listener(hass, *, listener, **kwargs) is a @callback returning an unregister function; notify listeners during async_setup_entry.
Agent contract. The BackupAgent subclass (from homeassistant.components.backup) sets domain/name/unique_id and implements async_upload_backup, async_download_backup, async_list_backups, async_get_backup, and async_delete_backup — the full abstract interface.
Error semantics. Errors raise BackupAgentError (or a subclass) — no other exception leaves the agent; a missing backup raises BackupNotFound in async_download_backup/async_delete_backup/async_get_backup. Call the on_progress callback periodically in async_upload_backup.
No backup-manager territory. Never implement encryption, retention, scheduling, or restore orchestration; those belong to the backup manager or the core.
Name per spec/ha/naming-conventions/en.md and verify HA internals against the official docs (see spec/ha/upstream-docs-verification/en.md).

Read the full file on GitHub · 105 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.

10d ago First seen · 105 lines · 194 tokens per session scan A 2113e0cd380f

Subscribe to this mod's changes

ha-backup-platform-add is a skill published in the GitHub repository nolte/claude-home-assistant (1 stars, last pushed 1mo ago), licensed MIT. It adds 194 tokens to every session and 1,844 once invoked, about $0.0010 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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