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app-builder

Main application building orchestrator. Creates full-stack applications from natural language requests. Determines project type, selects tech stack, coordinates agents.

32

Quality

27%

Does it follow best practices?

Impact

No eval scenarios have been run

SecuritybySnyk

Advisory

Suggest reviewing before use

Optimize this skill with Tessl

npx tessl skill review --optimize ./skills/app-builder/SKILL.md
SKILL.md
Quality
Evals
Security

Quality

Discovery

32%

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

The description conveys the general purpose of the skill—building full-stack applications—but relies on internal jargon ('orchestrator', 'coordinates agents') rather than user-facing language. It critically lacks a 'Use when...' clause, making it difficult for Claude to know when to select this skill over others. The trigger terms are insufficient for matching common user requests like 'build me a web app' or 'create a new project'.

Suggestions

Add an explicit 'Use when...' clause with natural trigger phrases such as 'build an app', 'create a web application', 'new project', 'scaffold a full-stack app', 'generate an application from scratch'.

Replace internal jargon like 'orchestrator' and 'coordinates agents' with user-facing language describing concrete outcomes (e.g., 'generates project structure, sets up frontend and backend, configures build tools').

Include specific examples of supported project types or tech stacks (e.g., 'React + Node.js web apps, Python Flask APIs') to improve distinctiveness and help Claude differentiate this from other code-generation skills.

DimensionReasoningScore

Specificity

Names the domain (full-stack application building) and some actions (determines project type, selects tech stack, coordinates agents), but the actions are more about orchestration mechanics than concrete user-facing capabilities. 'Creates full-stack applications from natural language requests' is somewhat specific but lacks detail on what kinds of applications or what the output looks like.

2 / 3

Completeness

Describes what it does (creates full-stack applications, determines project type, selects tech stack, coordinates agents) but completely lacks a 'Use when...' clause or any explicit trigger guidance for when Claude should select this skill. Per the rubric, a missing 'Use when...' clause should cap completeness at 2, and the 'when' is not even implied clearly, so this scores a 1.

1 / 3

Trigger Term Quality

Includes some relevant terms like 'full-stack applications', 'tech stack', and 'natural language requests', but misses many natural user phrases like 'build an app', 'create a website', 'web app', 'project scaffold', 'new project', 'generate application'. The term 'orchestrator' and 'coordinates agents' are internal/technical jargon unlikely to appear in user requests.

2 / 3

Distinctiveness Conflict Risk

The 'full-stack applications' and 'orchestrator' framing provides some distinctiveness, but 'creates applications from natural language requests' is broad enough to overlap with many code generation or project scaffolding skills. The lack of specific file types, frameworks, or use case boundaries increases conflict risk.

2 / 3

Total

7

/

12

Passed

Implementation

22%

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

This skill functions primarily as a navigation index rather than an actionable skill. While the table-based organization and selective reading guidance are well-structured, the file lacks any concrete, executable instructions—there are no commands, no code, no decision logic, and no validation steps. Claude would need to read multiple referenced files before being able to do anything, making this SKILL.md essentially an empty orchestrator with no standalone value.

Suggestions

Add a concrete, executable quick-start workflow with actual decision logic (e.g., if request mentions X keywords → select Y template → run Z commands) rather than just a descriptive example.

Include the core project detection logic inline (even a simplified keyword→project-type mapping) so Claude can begin working without reading external files.

Add explicit validation checkpoints to the workflow: e.g., verify project type with user before scaffolding, validate dependencies install correctly, confirm build succeeds before coordinating agents.

Replace the generic 'When to Use' and 'Limitations' boilerplate with skill-specific constraints (e.g., maximum project complexity, unsupported project types, required user inputs).

DimensionReasoningScore

Conciseness

The content is mostly efficient with good use of tables for navigation, but includes some unnecessary sections like 'When to Use' and 'Limitations' that are generic boilerplate adding no skill-specific value. The selective reading rule header is useful but slightly over-formatted.

2 / 3

Actionability

The skill provides no executable code, no concrete commands, and no specific instructions for how to actually build an application. The usage example is a high-level description of a process rather than actionable steps. It's essentially a table of contents pointing to other files with no standalone guidance.

1 / 3

Workflow Clarity

The usage example shows a numbered list but it's purely illustrative with no validation checkpoints, no error handling, no feedback loops, and no concrete steps Claude can follow. There's no actual workflow defined—just a vague sequence (determine type, choose stack, create plan, coordinate agents) with no detail on how to execute any step.

1 / 3

Progressive Disclosure

The file has well-organized tables pointing to sub-files with clear 'When to Read' guidance, which is good structure. However, since no bundle files were provided, we can't verify the references exist. More importantly, the SKILL.md itself contains almost no substantive content—it's nearly entirely references with no quick-start or overview content to act on independently.

2 / 3

Total

6

/

12

Passed

Validation

90%

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

Validation10 / 11 Passed

Validation for skill structure

CriteriaDescriptionResult

frontmatter_unknown_keys

Unknown frontmatter key(s) found; consider removing or moving to metadata

Warning

Total

10

/

11

Passed

Repository
sickn33/antigravity-awesome-skills
Reviewed

Table of Contents

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