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firebase-basics

Provides foundational Firebase CLI setup, CLI installation, version checks (`firebase-tools@latest --version`), CLI login (including --no-localhost), project creation, project selection (`firebase use`), and app config file downloads (`google-services.json`, `GoogleService-Info.plist`). Use ONLY for CLI login, project creation/switching, or downloading app config files. Don't use for Firebase Hosting deploy, Firestore, Auth, App Hosting, Data Connect, Crashlytics, or Remote Config.

Quality

88%

Does it follow best practices?

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SecuritybySnyk

Low

Low-risk findings worth noting

SKILL.md
Quality
Evals
Security

Quality

Content

82%Weight 40%Scale 1-5

Reviews the quality of instructions and guidance provided to agents. Good implementation is clear, handles edge cases, and produces reliable results.

A well-structured, highly actionable body that assumes Claude's competence and delegates detail to real, one-level-deep reference files, with sensible confirmation checkpoints in its setup workflow. The main weaknesses are mild token redundancy from repeating the npx prefix, missing error-recovery loops around project creation, and one orphaned bundle file (flutter_setup.md) not reachable from the main document.

Suggestions

State the npx prefix principle once and use a shortened form (e.g., 'firebase-tools ...') in inline examples to cut repeated tokens now that 'NEVER suggest the naked `firebase` command' already establishes the rule.

Add brief error-recovery guidance for 'projects:create' (e.g., what to do when the project ID is taken or invalid) to strengthen the feedback loop around the one irreversible operation in the workflow.

Link references/flutter_setup.md from the References section and give Cursor its own refresh pointer (or explain the shared 'other-agents.md' mapping) so every bundle file is discoverable from SKILL.md.

DimensionReasoningScore

Conciseness

The body is largely efficient — it assumes Claude's competence (no 'what is Firebase' padding) and uses terse, command-first sections — but includes trimmable redundancy: the full 'npx -y firebase-tools@latest' prefix is repeated in every example despite being established as a principle ('NEVER suggest the naked `firebase` command'), and the emphasis scaffolding ('CRITICAL', 'DO NOT SKIP') adds tokens without adding information. This fits the 'efficient; minor instances of over-explanation' anchor rather than the lean 5.

4 / 5

Actionability

Every instruction is executable and copy-paste ready: 'npx -y firebase-tools@latest --version', 'login:list', 'login --no-localhost', 'use <PROJECT_ID>', 'projects:create <project-id> --display-name "<display-name>"', and 'apps:sdkconfig ANDROID <APP_ID> --project <PROJECT_ID>' cover the common cases with concrete placeholders, plus the practical detail of creating `{}` in firebase.json before `use`.

5 / 5

Workflow Clarity

The prerequisites → authentication → active-project sequence is clear with most checkpoints present: 'login:list' verifies auth state, 'use' verifies the active project, and confirmation with the user is required when no Project ID was given. Minor validation gaps remain — no error-recovery guidance for 'projects:create' (e.g., globally-unique ID collisions) or for 'apps:sdkconfig' failures — so it matches anchor 4 rather than 5.

4 / 5

Progressive Disclosure

Good structure: the body stays an overview, detailed per-agent setup and refresh content lives in clearly signaled one-level-deep 'references/setup/*' and 'references/refresh/*' files, and spot-checks confirm those references are real leaf files rather than chains. Minor organization gaps keep it below 5: 'references/flutter_setup.md' exists in the bundle but is never linked from SKILL.md, and the Cursor entry in the refresh list points to the shared 'other-agents.md' rather than a Cursor-specific file, blurring the mapping.

4 / 5

Total

17

/

20

Passed

Description

92%Weight 40%Scale 1-5

Based on the skill's description, can an agent find and select it at the right time? Clear, specific descriptions lead to better discovery.

A strong description in third-person voice that enumerates concrete capabilities with command and file names, states explicit 'use when' triggers, and delineates boundaries against neighboring Firebase skills. Only minor keyword synonyms are missing.

DimensionReasoningScore

Specificity

Lists multiple concrete actions — 'CLI installation, version checks (`firebase-tools@latest --version`), CLI login (including --no-localhost), project creation, project selection (`firebase use`), and app config file downloads (`google-services.json`, `GoogleService-Info.plist`)' — with specific command and file names, giving comprehensive coverage of the skill's capabilities.

5 / 5

Completeness

Explicitly answers both what (detailed capability list with concrete commands and file names) and when ('Use ONLY for CLI login, project creation/switching, or downloading app config files'), and adds negative triggers ('Don't use for Firebase Hosting deploy, Firestore, Auth...') — matching the top anchor with concrete trigger phrases.

5 / 5

Trigger Term Quality

Good natural-term coverage: 'CLI login', 'project creation/switching', 'app config file downloads', plus concrete file names users would mention. A few common phrasings are missing (e.g., 'sign in to Firebase', 'add Firebase to my app', 'initialize a Firebase project'), so it falls just short of the comprehensive-with-synonyms anchor.

4 / 5

Distinctiveness Conflict Risk

A clear niche (foundational CLI setup only) with an explicit exclusion list of adjacent domains ('Don't use for Firebase Hosting deploy, Firestore, Auth, App Hosting, Data Connect, Crashlytics, or Remote Config'), minimizing the risk of triggering for the wrong Firebase skill.

5 / 5

Total

19

/

20

Passed

Validation

87%

Checks the skill against the spec for correct structure and formatting. All validation checks must pass before discovery and implementation can be scored.

Validation — 14 / 16 Passed

Validation for skill structure

CriteriaDescriptionResult

relative_links

Relative link issues: 13 deeper-than-1-level

Warning

referenced_paths_exist

Referenced path issues: 26 deeper-than-1-level

Warning

Total

14

/

16

Passed

Repository

firebase/agent-skills

Path

skills/firebase-basics/SKILL.md

Reviewed

Table of Contents

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