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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.

47

Quality

50%

Does it follow best practices?

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Adds up to 20 points to the overall score

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SecuritybySnyk

Medium

Suggest reviewing before use

Fix and improve this skill with Tessl

tessl review fix ./skills/app-builder/SKILL.md
SKILL.md
Quality
Evals
Security

Quality

Content

46%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.

The body has a genuinely good progressive-disclosure design on paper — a selective-reading content map and a template index — but every referenced file is missing from the bundle, so the navigation leads nowhere, and the actual orchestration workflow exists only as a usage example without validation checkpoints. Two sections (When to Use, Limitations) are vague filler that spend tokens without adding skill-specific value.

Suggestions

Ship the referenced bundle files (project-detection.md, tech-stack.md, agent-coordination.md, scaffolding.md, feature-building.md, and the templates/ tree) — the entire content map currently points at paths that do not exist, which is the single biggest defect.

Replace the filler "When to Use" section with concrete trigger conditions, and make the orchestration steps a real workflow section with explicit checkpoints (e.g., confirm the plan with the user before scaffolding, verify the scaffold builds/starts before handing off).

Fix the "Templates (13)" header — only 12 templates are listed — and delete or rewrite the generic Limitations boilerplate to address this skill's actual risks (e.g., tech-stack choices that conflict with an existing codebase).

DimensionReasoningScore

Conciseness

The body is table-driven and mostly lean, but contains unnecessary filler: "This skill is applicable to execute the workflow or actions described in the overview" says nothing, and the Limitations section is generic boilerplate ("Do not treat the output as a substitute for environment-specific validation"). Not 4 because two full sections add tokens without skill-specific value; not 2 because there is no concept re-explanation and the tables are tight.

3 / 5

Actionability

The content-map table gives concrete read-when guidance and the Instagram-clone walkthrough is a concrete illustration, but no executable commands, code, or specific procedures appear — the actual instructions are delegated to files that are not in the bundle. Not 4 because the guidance stops at "read this file" and high-level steps like "Coordinate agents" lack any operational detail; not 2 because the read-when table and worked example go beyond vague high-level hints.

3 / 5

Workflow Clarity

A sequence exists ("1. Project type... 2. Tech stack... 3. Create plan... 4. Coordinate agents... 5. Report progress... 6. Start preview") but only inside a usage example, with no validation or verification checkpoints anywhere (e.g., nothing about confirming the plan with the user or verifying the scaffolded app runs). Not 4 because checkpoints are absent rather than just minor; not 2 because a recognizable 6-step sequence is present rather than a rough fragment.

3 / 5

Progressive Disclosure

The content map and template index are well-designed one-level-deep navigation in form, but none of the referenced files exist in the bundle — no references/, scripts/, or assets/ directories are present, so every link (project-detection.md, tech-stack.md, agent-coordination.md, scaffolding.md, feature-building.md, templates/SKILL.md, and all 12 templates/*/TEMPLATE.md) dangles. Navigation that resolves to nothing is unusable in practice. Not 3 because broken references are a structural failure beyond "could be better organized"; not 1 because the body itself is well-sectioned and the intended structure is clear.

2 / 5

Total

11

/

20

Passed

Description

55%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.

The description answers "what" with a strong, specific action list, but completely omits "when" — no 'Use when...' clause or natural trigger phrases — which caps completeness and leaves trigger-term quality mediocre. Its breadth ("full-stack applications" from "natural language requests") also creates real conflict risk with general development skills.

Suggestions

Append an explicit trigger clause, e.g. "Use when the user asks to build, scaffold, or create a new application, website, API, or mobile app from scratch".

Add natural user phrasings and synonyms ("build an app", "web app", "landing page", "REST API", "browser extension") so the description matches how users actually phrase build requests.

Narrow the scope claim (e.g. "from scratch" / "new project") to reduce overlap with skills for modifying or debugging existing codebases.

DimensionReasoningScore

Specificity

"Creates full-stack applications from natural language requests", "Determines project type", "selects tech stack", "coordinates agents" — several concrete, distinct actions forming a coherent capability list. Not 5 because coverage has gaps (no mention of scaffolding, planning artifacts, or deployment coordination); not 3 because it lists more than 1-2 actions and they are specific rather than generic.

4 / 5

Completeness

The "what" is clearly answered ("Creates full-stack applications from natural language requests. Determines project type, selects tech stack, coordinates agents"), but there is no "Use when..." clause or equivalent explicit trigger guidance — per the judging guidelines this caps completeness at 3. Not 4 because the "when" is entirely absent rather than merely imprecise.

3 / 5

Trigger Term Quality

Relevant keywords like "full-stack applications", "application building", and "tech stack" exist, but common natural variations users would say ("build me an app", "make a website", "create a CLI", "web app", "mobile app") are missing. Not 4 because keyword coverage is thin and no synonyms or concrete trigger phrases appear; not 2 because the terms present are on-domain rather than purely generic.

3 / 5

Distinctiveness Conflict Risk

"Main application building orchestrator" names a niche, but "Creates full-stack applications" is broad and would overlap with general coding, web-dev, and scaffolding skills — a user asking to "build an app" could plausibly trigger several of them. Not 4 because the overlap risk extends beyond closely related skills; not 2 because the orchestrator framing and tech-stack selection do carve out a recognizable role.

3 / 5

Total

13

/

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

frontmatter_unknown_keys

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

Warning

relative_links

Relative link issues: 12 missing, 12 deeper-than-1-level

Warning

Total

14

/

16

Passed

Repository
sickn33/agentic-awesome-skills
Reviewed

Table of Contents

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