What is arch-lens-c4-container?

A tool for creating a C4 container diagram, a high-level map of a system's deployable building blocks and their technology choices.

Use it to document containers, their technologies, communication boundaries, and integrations with outside systems.

It helps new team members understand the main parts of a system and its external connections without reading implementation details.

arch-lens-c4-container — Skill for Claude Code by TalonT-Org

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent

npx skills add TalonT-Org/AutoSkillit --skill arch-lens-c4-container

Clone the repo

git clone --depth 1 https://github.com/TalonT-Org/AutoSkillit

Made for: Claude Code.

Or install autoskillit, the plugin that ships this one along with the rest of its 121 skills, 1 MCP server.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

README.md

[![agentmods](https://agentmods.dev/badge/skills/talont-org/autoskillit/arch-lens-c4-container/github.svg)](https://agentmods.dev/skills/talont-org/autoskillit/arch-lens-c4-container)

Your own site

<a href="https://agentmods.dev/skills/talont-org/autoskillit/arch-lens-c4-container"><img src="https://agentmods.dev/badge/skills/talont-org/autoskillit/arch-lens-c4-container/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

Your own site · 80×15

<a href="https://agentmods.dev/skills/talont-org/autoskillit/arch-lens-c4-container"><img src="https://agentmods.dev/badge/skills/talont-org/autoskillit/arch-lens-c4-container.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 34 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 2,229 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

Origin original No closer match found in the catalogue.

Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

Model	Per session	Once invoked
Fable 5.1	$0.00034	$0.02229
Opus 5	$0.00017	$0.01115
Sonnet 5	$0.00007	$0.00446
Haiku 4.5	$0.00003	$0.00223

Measured 11d ago against content hash 8759255c2117, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade A, and why

arch-lens-c4-container scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 11d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

src/autoskillit/skills_extended/arch-lens-c4-container/SKILL.md · 283 lines

How it starts

The opening of the file, as written. The whole thing — 283 lines — stays where its author put it; the contents beside it link to each section on GitHub.

C4 Container Architecture Lens

Cognitive Mode: Anatomical Primary Question: "How is it built?" Focus: Static Structure, Containers, Technology Choices, External Integrations

When to Use

Need to understand the high-level technical building blocks
Documenting container boundaries and communication
Onboarding new team members to system architecture
User invokes /autoskillit:arch-lens-c4-container or /autoskillit:make-arch-diag c4

Critical Constraints

NEVER:

Modify any source code files
Include internal implementation details (that's for other lenses)
Show runtime behavior or state transitions
Run subagents in the background (run_in_background: true is prohibited)

ALWAYS:

Focus on CONTAINERS (deployable units, not classes)
Show technology choices for each container
Identify external systems and integrations
BEFORE creating any diagram, LOAD the /autoskillit:mermaid skill using the Skill tool - this is MANDATORY
If the Skill tool cannot be used (disable-model-invocation) or refuses this invocation, do NOT proceed with diagram creation. Abort this step and omit the diagram from output.
After writing the diagram file, emit the absolute path as a structured output token as your final output. Resolve the relative temp/arch-lens-c4-container/... save path to absolute by prepending the full CWD:
```
diagram_path = /absolute/cwd/temp/arch-lens-c4-container/{filename}.md
```
This token is MANDATORY — the pipeline cannot proceed without it.

Arguments

/autoskillit:arch-lens-c4-container [context_path]

context_path (optional) — Absolute path to a PR context file containing new files (★-prefixed) and modified files (●-prefixed) from the PR diff. When provided, read this file before beginning analysis and focus the diagram on the architectural areas affected by these specific files. When absent, explore the full CWD.

Analysis Workflow

Step 0: Read PR context (when provided)

Read the full file on GitHub · 283 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

11d ago First seen · 283 lines · 34 tokens per session scan A 8759255c2117

Subscribe to this mod's changes

arch-lens-c4-container is a skill published in the GitHub repository TalonT-Org/AutoSkillit (5 stars, last pushed today), licensed MIT. It adds 34 tokens to every session and 2,229 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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