What is firebase-firestore?

A guide for setting up and working with Cloud Firestore, Firebase’s database for storing application data, including its Standard and Enterprise editions.

Use it to list or create databases, select a location, define data models and indexes, write queries, configure rules, and connect web, Python, iOS, Android, or Flutter apps.

It helps choose the correct database edition before creating data models, indexes, security rules, or SDK integrations.

firebase-firestore — Skill for Claude Code and Codex by firebase: A guide for setting up and working with Cloud…

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/firebase/agent-skills/firebase-firestore

Any agent

npx skills add firebase/agent-skills --skill firebase-firestore

Clone the repo

git clone --depth 1 https://github.com/firebase/agent-skills

Made for: Claude Code, Codex.

Or install firebase, the plugin that ships this one along with the rest of its 12 skills, 1 MCP server.

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/firebase/agent-skills/firebase-firestore.svg)](https://agentmods.dev/skills/firebase/agent-skills/firebase-firestore)

Your own site

<a href="https://agentmods.dev/skills/firebase/agent-skills/firebase-firestore"><img src="https://agentmods.dev/badge/skills/firebase/agent-skills/firebase-firestore.svg" alt="Measured on agentmods" height="20"></a>

Per session 99 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 881 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.

Model	Per session	Once invoked
Fable 5	$0.00099	$0.00881
Opus 5	$0.00049	$0.00441
Sonnet 5	$0.00020	$0.00176
Haiku 4.5	$0.00010	$0.00088

Measured 4d ago against content hash 5a347a1c0856, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

firebase-firestore 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 4d 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.

Origin

Copies of this mod

1 near-identical copy found in the catalogue:

firebase-firestore — 86% identical, 9 lines differ

skills/firebase-firestore/SKILL.md · 87 lines

How it starts

The opening of the file, as written. The whole thing — 87 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Cloud Firestore Database and Operations

Before setting up dependencies, writing data models, or configuring security rules, you MUST always identify the Firestore instance edition.

1. Instance Selection and Edition Detection

Run the following command to list current Firestore databases: bash npx -y firebase-tools@latest firestore:databases:list

A. Instance Found

For each database found, inspect its edition and details: bash npx -y firebase-tools@latest firestore:databases:get <database-id>
Ask the user which database instance they wish to target or if they would prefer to create a new instance.
Once the target instance is established:
- If the edition is STANDARD, follow the guides under references/standard/.
- If the edition is ENTERPRISE or native mode, follow the guides under references/enterprise/.

B. No Instance Found (or New Requested)

If no databases exist or the user requests a new one, default to provisioning an Enterprise edition database and ask the user what location to use. Run npx -y firebase-tools@latest firestore:locations to get the list of options. Suggest colocating with other resources if applicable.

Once the location is determined, create the database: bash npx -y firebase-tools@latest firestore:databases:create <database-id> --edition="enterprise" --location="<selected-location>"

Proceed with using the guides under references/enterprise/.

2. Specialized Guides

Based on the identified or created instance edition, open and read the corresponding reference guides:

Standard Edition (`references/standard/`)

Provisioning: Read provisioning.md
Security Rules: Read security_rules.md
SDK Usage: Read web_sdk_usage.md, android_sdk_usage.md, ios_setup.md, or flutter_setup.md
Indexes: Read indexes.md

Read the full file on GitHub · 87 lines

Files

What ships with it

16 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.

4d ago First seen · 87 lines · 99 tokens per session scan A 5a347a1c0856

Subscribe to this mod's changes

firebase-firestore is a skill published in the GitHub repository firebase/agent-skills (434 stars, last pushed yesterday), licensed Apache-2.0. It adds 99 tokens to every session and 881 once invoked, about $0.0005 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 2026-08-30.

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