dockerfile-generator
Dockerfile Generator - Auto-activating skill for DevOps Basics. Triggers on: dockerfile generator, dockerfile generator Part of the DevOps Basics skill category.
34
3%
Does it follow best practices?
Impact
90%
1.00xAverage score across 3 eval scenarios
Passed
No known issues
Optimize this skill with Tessl
npx tessl skill review --optimize ./planned-skills/generated/01-devops-basics/dockerfile-generator/SKILL.mdQuality
Discovery
7%Based on the skill's description, can an agent find and select it at the right time? Clear, specific descriptions lead to better discovery.
This description is extremely weak — it is essentially a skill name repeated with boilerplate category metadata and a duplicated trigger term. It provides no concrete actions, no natural trigger keywords beyond the skill name, and no explicit 'Use when...' guidance. It would be nearly useless for Claude to differentiate this skill from others in a large skill library.
Suggestions
Add specific concrete actions the skill performs, e.g., 'Generates Dockerfiles for projects, configures multi-stage builds, selects appropriate base images, and optimizes layer caching.'
Add an explicit 'Use when...' clause with natural trigger terms, e.g., 'Use when the user asks to create a Dockerfile, containerize an application, build a Docker image, or set up a container configuration.'
Include common keyword variations users might say: 'Docker', 'container', 'containerize', 'docker image', 'Dockerfile', '.dockerfile', 'docker build'.
| Dimension | Reasoning | Score |
|---|---|---|
Specificity | The description says 'Dockerfile Generator' but does not list any concrete actions like 'creates Dockerfiles from project configurations', 'adds multi-stage builds', or 'optimizes layer caching'. It's essentially just a name repeated with no elaboration of capabilities. | 1 / 3 |
Completeness | The 'what' is barely stated (just the name 'Dockerfile Generator') and there is no 'when' clause explaining when Claude should select this skill. The 'Triggers on' line just repeats the skill name and does not serve as meaningful trigger guidance. | 1 / 3 |
Trigger Term Quality | The only trigger term listed is 'dockerfile generator' repeated twice. It misses natural user phrases like 'Docker', 'container', 'Dockerfile', 'containerize', 'docker image', 'build image', or '.dockerfile'. | 1 / 3 |
Distinctiveness Conflict Risk | The term 'Dockerfile' does narrow the domain somewhat, making it unlikely to conflict with non-Docker skills. However, the lack of specificity about what exactly it generates or when to use it could cause overlap with broader DevOps or Docker-related skills. | 2 / 3 |
Total | 5 / 12 Passed |
Implementation
0%Reviews the quality of instructions and guidance provided to agents. Good implementation is clear, handles edge cases, and produces reliable results.
This skill is an empty shell with no substantive content. It consists entirely of auto-generated boilerplate that describes what the skill would do without actually providing any Dockerfile generation guidance, examples, templates, or best practices. It fails on every dimension because it contains no actionable information whatsoever.
Suggestions
Add a concrete Dockerfile template with best practices (multi-stage builds, minimal base images, proper layer ordering, non-root user) as executable, copy-paste-ready examples.
Include a step-by-step workflow: 1) Determine base image, 2) Set up dependencies, 3) Copy application code, 4) Configure entrypoint, with validation steps like 'docker build --no-cache' and 'docker scan' for security checks.
Replace all meta-description sections (Purpose, When to Use, Capabilities, Example Triggers) with actual instructional content—e.g., common patterns for Python/Node/Go apps, security hardening checklist, and .dockerignore guidance.
Add references to advanced topics in separate files (e.g., MULTI_STAGE.md, SECURITY.md) rather than trying to cover everything inline, enabling progressive disclosure.
| Dimension | Reasoning | Score |
|---|---|---|
Conciseness | The content is entirely filler and meta-description. It explains what the skill does in abstract terms without providing any actual Dockerfile generation guidance. Every section describes rather than instructs, wasting tokens on information Claude doesn't need. | 1 / 3 |
Actionability | There is zero concrete guidance—no Dockerfile examples, no commands, no code snippets, no templates, no best practices. The content is entirely vague descriptions like 'Provides step-by-step guidance' without actually providing any. | 1 / 3 |
Workflow Clarity | No workflow is defined at all. There are no steps for generating a Dockerfile, no validation checkpoints, and no sequenced process. The skill merely claims it provides 'step-by-step guidance' without including any steps. | 1 / 3 |
Progressive Disclosure | The content is a flat, monolithic block of meta-descriptions with no meaningful structure. There are no references to detailed files, no examples section, and no navigation to deeper content. The sections that exist (Purpose, When to Use, Capabilities) are all redundant restatements of the same vague idea. | 1 / 3 |
Total | 4 / 12 Passed |
Validation
81%Checks the skill against the spec for correct structure and formatting. All validation checks must pass before discovery and implementation can be scored.
Validation — 9 / 11 Passed
Validation for skill structure
| Criteria | Description | Result |
|---|---|---|
allowed_tools_field | 'allowed-tools' contains unusual tool name(s) | Warning |
frontmatter_unknown_keys | Unknown frontmatter key(s) found; consider removing or moving to metadata | Warning |
Total | 9 / 11 Passed | |
- Commit
c8a915c
- Reviewed
Table of Contents
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