What is arch-lens-development?

A tool for drawing how a project is developed, built, and tested, including its structure, tools, and quality checks.

Use it to document project entry points, build tools, test frameworks, and the checks code must pass.

It gives developers a clear view of the development workflow without mixing it with the system's runtime design.

arch-lens-development — 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-development

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-development.svg)](https://agentmods.dev/skills/talont-org/autoskillit/arch-lens-development)

Your own site

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

Per session 31 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 2,263 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	$0.00031	$0.02263
Opus 5	$0.00015	$0.01131
Sonnet 5	$0.00006	$0.00453
Haiku 4.5	$0.00003	$0.00226

Measured 7d ago against content hash e5d627c76f3c, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-07, from the pricing page.

Security

Grade A, and why

arch-lens-development 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 7d 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-development/SKILL.md · 310 lines

How it starts

The opening of the file, as written. The whole thing — 310 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Development Architecture Lens

Cognitive Mode: Development Primary Question: "How is it built and tested?" Focus: Project Structure, Build Tools, Quality Gates, Test Framework

When to Use

Need to understand developer experience
Documenting build and test infrastructure
Analyzing code quality gates
User invokes /autoskillit:arch-lens-development or /autoskillit:make-arch-diag development

Critical Constraints

NEVER:

Modify any source code files
Include runtime architecture details
Show business logic
Run subagents in the background (run_in_background: true is prohibited)

ALWAYS:

Focus on BUILD and TEST infrastructure
Show quality gate pipeline
Document test framework setup
Include entry points
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-development/... save path to absolute by prepending the full CWD:
```
diagram_path = /absolute/cwd/temp/arch-lens-development/{filename}.md
```
This token is MANDATORY — the pipeline cannot proceed without it.

Arguments

/autoskillit:arch-lens-development [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)

If a context_path positional argument is present:

Read the file at context_path
Extract: new files list (★-prefixed), modified files list (●-prefixed)
Focus Step 1 exploration on the modules/components these files belong to
Apply ★ prefix on diagram nodes representing new files/components
Apply ● prefix on diagram nodes representing modified files/components

Read the full file on GitHub · 310 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.

7d ago First seen · 310 lines · 31 tokens per session scan A e5d627c76f3c

Subscribe to this mod's changes

arch-lens-development is a skill published in the GitHub repository TalonT-Org/AutoSkillit (5 stars, last pushed 9d ago), licensed MIT. It adds 31 tokens to every session and 2,263 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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