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c4-container

Expert C4 Container-level documentation specialist.

67

2.75x
Quality

50%

Does it follow best practices?

Impact

99%

2.75x

Average score across 3 eval scenarios

SecuritybySnyk

Passed

No findings from the security scan

Fix and improve this skill with Tessl

tessl review fix ./plugins/AI-Agents-Safe-Coding-Skills-claude/skills/c4-container/SKILL.md

The canonical home for this skill is c4-container in sickn33/agentic-awesome-skills

SKILL.md
Quality
Evals
Security

Quality

Content

51%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 delivers concrete, reusable documentation templates (Mermaid container diagram, OpenAPI spec, structured container fields) but is undermined by generic boilerplate instructions, an absent multi-step workflow with validation, and a buried broken reference to a non-existent playbook file.

Suggestions

Replace the generic "Instructions" section with a concrete step sequence with a validation checkpoint (e.g. draft container fields → render Mermaid diagram → validate against component list → generate OpenAPI spec).

Move the large Mermaid and OpenAPI templates into reference files under references/ and link to them from the body, and create the referenced `resources/implementation-playbook.md` (or fix the path) so navigation is one level deep and resolvable.

Trim the restated "Key Principles" from c4model.com to the few decision-relevant rules, since Claude already understands C4 basics.

DimensionReasoningScore

Conciseness

The body is mostly efficient templates, but the generic "Instructions" boilerplate ("Clarify goals… Apply relevant best practices and validate outcomes") and restated C4 "Key Principles" add unnecessary explanation that could be trimmed — matching the score-3 anchor "Mostly efficient but includes some unnecessary explanation or could be tightened".

3 / 5

Actionability

Concrete, copy-paste-ready artifacts are provided — a full Mermaid C4Container diagram and an OpenAPI 3.1 spec template — with minor gaps from placeholder fields and the vague Instructions section, fitting "Mostly executable guidance; concrete code or commands with minor gaps".

4 / 5

Workflow Clarity

The only workflow guidance is the abstract Instructions sequence ("Clarify goals… validate outcomes… Provide actionable steps and verification") with poorly defined steps and no concrete validation checkpoints, aligning with the score-2 anchor "Rough sequence present but many gaps; steps poorly defined; validation absent".

2 / 5

Progressive Disclosure

Section structure is reasonable (Containers, Interfaces, Dependencies, Infrastructure, Diagram, API Spec), but the single reference to `resources/implementation-playbook.md` is buried, the file does not exist in the bundle, and large template blocks (Mermaid/OpenAPI) that could live in separate files are inlined — matching "Some structure… references present but not clearly signaled; content that should be separate is inline".

3 / 5

Total

12

/

20

Passed

Description

48%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 is a terse domain label rather than a trigger-rich skill description: it names the C4 container-level niche but lists no concrete actions and omits any "Use when" guidance. It is distinct within the C4 family yet too thin to surface reliably for the right task.

Suggestions

Add concrete actions, e.g. "Create C4 container diagrams, map components to deployment units, and generate OpenAPI/Swagger specs for container APIs."

Append an explicit trigger clause such as "Use when documenting container-level deployment architecture, mapping components to containers, or producing container diagrams and API specs."

Include natural synonym keywords users say ("container diagram", "deployment architecture", "system deployment") to improve trigger coverage beyond the single phrase.

DimensionReasoningScore

Specificity

The phrase "C4 Container-level documentation specialist" names the domain but the only action term is the generic "specialist", with no concrete actions like "create container diagrams" or "generate OpenAPI specs" — matching the score-2 anchor ("Names the domain but actions are minimal or generic").

2 / 5

Completeness

A clear-ish "what" is present (C4 container-level documentation) but there is no "Use when…" trigger guidance, so per the missing-trigger-clause cap completeness cannot exceed 3 — matching "Has a clear 'what' but 'when' is missing or only weakly implied".

3 / 5

Trigger Term Quality

"C4 Container-level documentation" is a relevant keyword a user working with C4 modeling would naturally say, but the description offers no synonyms or variations (e.g. "container diagram", "deployment architecture"), fitting the score-3 anchor of relevant keywords missing common variations.

3 / 5

Distinctiveness Conflict Risk

"C4 Container-level" is a specific niche distinct from most skills, with only minor overlap risk against closely related sibling C4 skills (Component, Context, Code), aligning with the score-4 anchor "Mostly distinct; minor overlap risk with closely related skills".

4 / 5

Total

12

/

20

Passed

Validation

93%

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

Validation15 / 16 Passed

Validation for skill structure

CriteriaDescriptionResult

frontmatter_unknown_keys

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

Warning

Total

15

/

16

Passed

Repository
administrakt0r/AI-Agents-Safe-Coding-Skills
Reviewed

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