ingenious: Command for Claude Code

.claude/commands/viz/c4-map.md

c4-map is a command for Claude Code from Insight-Services-APAC/ingenious. It costs 0 tokens per session (1,720 once invoked), scanned A, original, MIT.

A command that maps a codebase using the C4 model, a set of diagrams that describe a system from its overall context down to individual code parts.

In plain words
What is it for?
It is for documenting system boundaries, external services, deployable parts, components, and source files.
Why use it?
It turns an unfamiliar codebase into a structured architecture map, making its systems, services, components, and files easier to understand.

Command for Claude Code

Written for Claude Code: installed under .claude/.

This is Insight-Services-APAC/ingenious's own configuration. It tells Claude Code how to work on ingenious itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything ingenious configures →

Reuse

Borrowing it

Nothing to install: this file belongs to Insight-Services-APAC/ingenious. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/Insight-Services-APAC/ingenious/main/.claude/commands/viz/c4-map.md
Clone the repo
git clone --depth 1 https://github.com/Insight-Services-APAC/ingenious

Made for: Claude Code.

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.

agentmods badge for c4-map

README.md
[![agentmods](https://agentmods.dev/badge/commands/insight-services-apac/ingenious/c4-map.svg)](https://agentmods.dev/commands/insight-services-apac/ingenious/c4-map)
Your own site
<a href="https://agentmods.dev/commands/insight-services-apac/ingenious/c4-map"><img src="https://agentmods.dev/badge/commands/insight-services-apac/ingenious/c4-map.svg" alt="Measured on agentmods" height="20"></a>
Per session 0 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 1,720 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00000 $0.01720
Opus 5 $0.00000 $0.00860
Sonnet 5 $0.00000 $0.00344
Haiku 4.5 $0.00000 $0.00172

Measured yesterday against content hash 17a2f6024be9, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, from the pricing page.

Security

Grade A, and why

c4-map 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 yesterday.

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.

.claude/commands/viz/c4-map.md · 255 lines

How it starts

The opening of the file, as written. The whole thing — 255 lines — stays where its author put it; the contents beside it link to each section on GitHub.

C4 Architecture Mapping

Map the codebase architecture using a hierarchical C4 model (Context -> Containers -> Components -> Code).

Orchestration

Phase 1: Context ──> Phase 2: Containers ──> Phase 3: Components ──> Phase 4: Code ──> Phase 5: Synthesis ──> Phase 6: Files

Each level depends on outputs from the previous level. Execute sequentially, passing outputs forward.

Output structure: See c4-templates.md


Phase 1: System Context

Tool: Task
Parameters:
  subagent_type: "Explore"
  description: "Map C4 system context"
  prompt: |
    Map SYSTEM CONTEXT level (C4 Level 1).

    GOALS:
    1. Identify system name, create kebab-case SYSTEM_ID
    2. Define system boundary and purpose
    3. Find actors (auth patterns, API consumers, user roles)
    4. Map external systems (SDK imports, env vars, HTTP clients)
    5. Identify preliminary containers (deployable units)

    SEARCH:
    - Glob: **/*.env*, **/pyproject.toml, **/package.json
    - Grep: "requests\.", "httpx\.", "import.*azure", "import.*aws"
    - Check docker-compose.yml for external services

    OUTPUT: JSON per c4-templates.md#context-phase-output
    Include C4-PlantUML context diagram

WAIT for Phase 1 to complete.

Store: SYSTEM_ID, EXTERNAL_SYSTEMS, PRELIMINARY_CONTAINERS


Phase 2: Containers

Tool: Task
Parameters:
  subagent_type: "Explore"
  description: "Map C4 containers"
  prompt: |
    Map CONTAINER level (C4 Level 2).

    CONTEXT FROM PHASE 1:
    - SYSTEM_ID: <insert>
    - EXTERNAL_SYSTEMS: <insert>
    - PRELIMINARY_CONTAINERS: <insert>

    GOALS:
    For each preliminary container:
    1. Validate it's a distinct deployable unit
    2. Identify technology stack (framework, runtime)
    3. Map inter-container communication (protocols)
    4. Identify preliminary components within each
    5. Validate external system boundaries

    SEARCH:
    - Glob: **/Dockerfile, **/docker-compose.yml, **/main.py
    - Grep: "FastAPI", "Express", "Flask"
    - Analyze directory structure per container

    OUTPUT: JSON per c4-templates.md#container-phase-output
    Include C4-PlantUML container diagram

Read the full file on GitHub · 255 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.

  1. yesterday First seen · 255 lines · 0 tokens per session scan A 17a2f6024be9

Subscribe to this mod's changes

c4-map is a command published in the GitHub repository Insight-Services-APAC/ingenious (24 stars, last pushed 7mo ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 1,720 tokens. 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 2026-09-04.