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Firebase Add Feature · aiskillstore | DecimalAI

codingby aiskillstore

Firebase Add Feature

aiskillstore/firebase-development-add-feature

Source aiskillstore/marketplace ↗License Not recorded

This skill should be used when adding features to existing Firebase projects.

SkillScore72Maintained

Automatic

Coding pack

Last verified 8/21/2026

What it changes

Passed 16 of 22 test cases with the skill, and 14 of 22 without it.

Without skill64%

With skill72%

Checks it passed that the model alone missed

The feature is categorized as a Scheduled Function during classification.
The source code file starts with ABOUTME comments describing the file purpose.
The response object includes success set to false and an explanatory message string.

and 1 more in the full report

4 fixed14 passed either way5 still failing2 broke

Pass-rate lift: +8 pp
Tokens: +37%
Agent turns: 0%
Response time: -40%

Model gemini-3.6-flashMeasured 8/21/2026v118 of 25 cases passed with skill · 22 comparable

Tokens, turns and time describe resource use, not a dollar price.

Use this skill

Save it into your project's skills folder. Claude Code picks it up in its next session.

curl -fsSL --create-dirs -o .claude/skills/aiskillstore-firebase-development-add-feature/SKILL.md https://app.decimal.ai/s/aiskillstore-firebase-development-add-feature/SKILL.md

Want it pinned and updatable? pip install "decimalai>=0.15", then decimalai skills add aiskillstore-firebase-development-add-feature, and start Claude Code with claude --plugin-dir "$(git rev-parse --show-toplevel)/.agents"

1 · One-time — install the CLI (docs ↗)

pip install "decimalai>=0.15"

2 · Get the skill — writes .agents/skills/aiskillstore-firebase-development-add-feature/ and pins it in .decimal/skills.lock

decimalai skills add aiskillstore-firebase-development-add-feature

No CLI? Get the same file — curl · raw file

curl -fsSL --create-dirs -o .claude/skills/aiskillstore-firebase-development-add-feature/SKILL.md https://app.decimal.ai/s/aiskillstore-firebase-development-add-feature/SKILL.md

Raw file: /s/aiskillstore-firebase-development-add-feature/SKILL.md ↗ · machine-readable summary at /s/aiskillstore-firebase-development-add-feature.json ↗

Safety checks: 3 of 3 passed

Code scan CleanIntent PassedContent Clean

See it in action

One of 4 test cases the skill fixed. Same model, same prompt, with and without the skill.

1 of 4

Prompt

What final local verification step should be executed to verify Cloud Function endpoints and security rules interact correctly?

What was checked, without and with the skill
Checked	Without skill	With skill
The response specifies running firebase emulators:start to test endpoints and rules.	Missed	Passed

case-23 · gemini-3.6-flash · 8/21/2026 · answers are capped and redacted

What's inside

The instructions your model reads when the skill loads.

SKILL.md240 linessingle file

Firebase Add Feature

Overview

This sub-skill guides adding new features to existing Firebase projects using TDD. It handles Cloud Functions, Firestore collections, and API endpoints.

Key principles:

Write tests FIRST (TDD requirement)
Use {success, message, data?} response pattern
Every file starts with ABOUTME comments
Verify with emulators before claiming done

When This Sub-Skill Applies

Adding a new Cloud Function
Creating a new Firestore collection with rules
Adding an API endpoint to Express app
User says: "add function", "create endpoint", "new collection", "implement"

Do not use for:

Initial project setup → firebase-development:project-setup
Debugging → firebase-development:debug
Code review → firebase-development:validate

TodoWrite Workflow

Create checklist with these 12 steps:

Step 1: Identify Feature Type

Determine what's being added:

HTTP Endpoint - API route (GET/POST/etc.)
Firestore Trigger - Runs on document changes
Scheduled Function - Cron job
Callable Function - Client SDK calls
New Collection - Firestore collection with rules

Step 2: Check Existing Architecture

Examine the project to understand patterns:

Track record

Benchmark

16 / 22

test cases passed, vs 14 / 22 without

Adoption

Users: 0
Times used: 0

Safety and source details

SkillSafety

✓ 3 of 3 passed

Code scan15 of 15 checks clean

0 critical · 0 warning · 0 info — scanner v4 — 8/3/2026

View 15 scanner checks

live_secretremote_code_executionreverse_shelldata_exfiltrationssrf_metadataagent_snoopinganti_refusaldestructive_commandsobfuscated_unicodeunicode_homoglyphopaque_blobsuspicious_urltool_overreachtrigger_abuseprompt_injection_phrasing

IntentSafe

LLM judge · does the skill do what it claims

ContentClean

LLM judge · policy & harmful-content review

Source

Imported

aiskillstore / marketplace

skills/2389-research/firebase-development-add-feature/SKILL.md

View on GitHub ↗

Imported 8/3/2026Version v1

More skills from the same source and nearby in the registry, with their headline benchmark lift.

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See it in action

What's inside

Firebase Add Feature

Overview

When This Sub-Skill Applies

TodoWrite Workflow

Step 1: Identify Feature Type

Step 2: Check Existing Architecture

Track record

Benchmark

Adoption

SkillSafety

Source

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