firebase SKILL.md skillA
firebase from ericrisco/rsc-harness is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add ericrisco/rsc-harness/firebase@git:20260729.9b4d66aPins git:20260729.9b4d66a in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- ericrisco/rsc-harness
- Path
skills/firebase/SKILL.md- Versions recorded
- 2
- Latest version
- git:20260729.9b4d66a, committed Jul 29, 2026
- First version recorded
- Jun 2, 2026
- Size
- 13,370 bytes
- Repository stars
- 236
- License
- MIT
Use when building on Firebase — Firestore data modeling, Security Rules, Auth and custom claims, Cloud Functions, Storage, modular Web/Admin SDK imports — including symptoms like a database open to the internet, a query rejected by rules, or a doc stuck at ~1 write/sec. NOT managed-Postgres BaaS with SQL and RLS (that is supabase).
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# Firebase — Firestore, Rules, Auth, Functions, Storage The Firebase product surface that sits on top of GCP, on the modular Web SDK (v12) and the Admin SDK. The whole skill exists to stop two failure modes: dragging relational/SQL habits into a NoSQL document store, and leaving the database open to the internet. Two facts drive everything below: - **It is a NoSQL document store, shaped for the read path.** No joins, no server-side `OR` across different fields without a composite index, no `SELECT *` across collections. Denormalize and fan-out so a screen is one cheap query — reads are what you pay for and what users wait on. - **Rules ARE the access control.** Firestore is reachable directly from untrusted clients. There is no app server in the trust path by default — `firestore.rules` (CEL) is the only thing between a browser and your data. App Check attests the request even came from your app before Rules evaluate. Not this skill: | Instead of Firebase | Go to | |---|---| | Relational schema, SQL, EXPLAIN, indexing a SQL engine | `../postgresdb/SKILL.md` | …
Read the whole file at its exact version.
How to install
mdr add ericrisco/rsc-harness/firebase@sha256:cac859af4fca0a07The line at the top of this page pins the label git:20260729.9b4d66a, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_2w6xryai7kqf5hi6)
2 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 2 versions of this file, between Jun 2, 2026 and Jul 29, 2026, about one every 57 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260729.9b4d66a latest | 2026-07-29 | 9b4d66a | 13,370 B | A | view · diff |
| git:20260602.a962997 | 2026-06-02 | a962997 | 14,596 B | A | view |
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (13370 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
ericrisco/rsc-harness · 236 stars · license MIT · pushed 2026-10-21 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_2w6xryai7kqf5hi6 GET https://markdownregistry.com/api/v1/resolve?ref=ericrisco/rsc-harness/firebase GET https://markdownregistry.com/api/v1/blob/cac859af4fca0a07949bb3fdb5240bd46ee45a92368036886a42a6c82277d182
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.