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firebase-messaging

firebase-messaging is a skill for Claude Code, Codex from GDvega/super-android-kotlin-firebase-skill. It costs 31 tokens per session (573 once invoked), scanned A, original, MIT.

Instructions for Firebase Cloud Messaging, Google's service for sending notifications and data messages to apps and devices.

In plain words
What is it for?
Adding push notifications, managing device tokens, handling foreground and background messages, requesting Android 13+ permission, and testing delivery.
Why use it?
It helps avoid lost or duplicated notifications, unsafe message data, invalid device tokens, and missing Android notification permission handling.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one. Also seen: $skill-name invocation.

not rated 2repo 2mo ago A scan 31 tokens original MIT

Good fit Adding push notifications, managing device tokens, handling foreground and background messages, requesting Android 13+ permission, and testing delivery.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/gdvega/super-android-kotlin-firebase-skill/firebase-messaging
View source ↗ GDvega/super-android-kotlin-firebase-skill
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 GDvega/super-android-kotlin-firebase-skill --skill firebase-messaging
Clone the repo
git clone --depth 1 https://github.com/GDvega/super-android-kotlin-firebase-skill

Made for: Claude Code, Codex.

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 firebase-messaging

README.md
[![agentmods](https://agentmods.dev/badge/skills/gdvega/super-android-kotlin-firebase-skill/firebase-messaging/github.svg)](https://agentmods.dev/skills/gdvega/super-android-kotlin-firebase-skill/firebase-messaging)
Your own site
<a href="https://agentmods.dev/skills/gdvega/super-android-kotlin-firebase-skill/firebase-messaging"><img src="https://agentmods.dev/badge/skills/gdvega/super-android-kotlin-firebase-skill/firebase-messaging/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 firebase-messaging

Your own site · 80×15
<a href="https://agentmods.dev/skills/gdvega/super-android-kotlin-firebase-skill/firebase-messaging"><img src="https://agentmods.dev/badge/skills/gdvega/super-android-kotlin-firebase-skill/firebase-messaging.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 31 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 573 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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00031 $0.00573
Opus 5 $0.00015 $0.00287
Sonnet 5 $0.00006 $0.00115
Haiku 4.5 $0.00003 $0.00057

Measured 9d ago against content hash 0ff978149743, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

firebase-messaging 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 9d 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/firebase-messaging/SKILL.md · 101 lines

How it starts

The opening of the file, as written. The whole thing — 101 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Purpose

Integrate push messaging with clear permissions, safe payloads and testable token handling.

When to use

  • Adding FCM notifications or data messages.
  • Managing device tokens.
  • Handling POST_NOTIFICATIONS permission.
  • Debugging foreground/background push behavior.

Inputs to inspect

  • Message type and target audience.
  • Payload shape and sensitivity.
  • Token lifecycle code.
  • Permission UX and backend sender.

Required workflow

  1. Define notification vs data message behavior.
  2. Add token storage/update strategy.
  3. Add contextual notification permission flow.
  4. Handle foreground/background display.
  5. Test token refresh and message delivery states.

Rules

  • Do not put sensitive data in push payloads.
  • Do not assume tokens are permanent.
  • Handle Android 13+ notification permission.
  • Avoid duplicate notifications.
  • Document backend and topic risks.

Local skills to invoke

  • firebase-core
  • firebase-cloud-functions
  • security-privacy
  • ui-state-design

External companion skills to use when installed

Do not assume these companion skills are installed. Prefer the local skills above first, then consult Companion Skills for install and verification commands.

  • firebase/agent-skills — use for deeper Firebase product, Firestore, Security Rules or emulator workflow guidance when installed.

Files commonly touched

  • FirebaseMessagingService
  • notification permission UI
  • backend/functions sender
  • AndroidManifest.xml
  • tests/fakes

Commands to validate

./gradlew assembleDebug
adb shell pm grant <package> android.permission.POST_NOTIFICATIONS
adb logcat
firebase emulators:start

Common mistakes to avoid

  • Sending PHI or secrets in payload.
  • Ignoring token refresh.
  • No fallback when permission is denied.
  • Assuming foreground and background behave the same.

Checklist

  • Permission flow exists.
  • Token lifecycle handled.
  • Payload safe.
  • Foreground/background tested.
  • Backend sender documented.

Read the full file on GitHub · 101 lines

Files

What ships with it

2 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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. 9d ago First seen · 101 lines · 31 tokens per session scan A 0ff978149743

Subscribe to this mod's changes

firebase-messaging is a skill published in the GitHub repository GDvega/super-android-kotlin-firebase-skill (2 stars, last pushed 2mo ago), licensed MIT. It adds 31 tokens to every session and 573 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.

Backend and APIsClaude CodeMobileagent-skillsai-agentsandroidandroid-studiocodex
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