# zzzmisa/japan-github-ranking architecture

> Architecture diagram of the GitHub repository zzzmisa/japan-github-ranking, generated by GitDiagram from its file tree, README and a sample of source files (last updated 2026-11-14). It is an AI-made overview: check details against the source.

- Interactive diagram: https://gitdiagram.com/zzzmisa/japan-github-ranking
- Repository: https://github.com/zzzmisa/japan-github-ranking

## Overview

Japan GitHub Ranking is a scheduled GitHub App action that finds repositories with Japanese descriptions and READMEs, ranks them by stars, and publishes the top results to its own README and dated JSON files. The sampled entry point and main implementation establish the orchestration and GitHub API operations; unsampled portions of main.js limit visibility into the precise internal search and filtering logic.

Main entry points: [`main.js`](https://github.com/zzzmisa/japan-github-ranking/blob/master/main.js) (Workflow coordinator), [`start.js`](https://github.com/zzzmisa/japan-github-ranking/blob/master/start.js) (Action launcher)

## Diagram (Mermaid)

```mermaid
flowchart TD

subgraph group_entry["Action entry"]
  node_start["Action launcher<br/>[start.js]"]
  node_main["Workflow coordinator<br/>[main.js]"]
end

subgraph group_ranking["Repository ranking"]
  node_auth["GitHub App auth<br/>[main.js]"]
  node_search["Repository search<br/>[main.js]"]
  node_description["Description filter<br/>[main.js]"]
  node_readmecheck["README validation<br/>[main.js]"]
  node_ranked["Ranked repositories<br/>[main.js]"]
end

subgraph group_publishing["Result publishing"]
  node_readmerender["README generation<br/>[main.js]"]
  node_jsonpublish["Dated JSON output<br/>[main.js]"]
end

node_scheduler(("Daily trigger"))
node_github{{"GitHub API"}}
node_target[("Ranking repository")]

node_scheduler -.->|"triggers"| node_start
node_start -->|"calls"| node_main
node_main -->|"initializes"| node_auth
node_main -->|"calls"| node_search
node_main -->|"calls"| node_readmecheck
node_main -->|"calls"| node_readmerender
node_main -->|"calls"| node_jsonpublish
node_search -->|"queries"| node_github
node_search -->|"filters"| node_description
node_readmecheck -->|"fetches READMEs"| node_github
node_readmecheck -->|"formats results"| node_ranked
node_readmerender -->|"reads and updates"| node_github
node_jsonpublish -->|"writes dated JSON"| node_github
node_readmerender -->|"updates README"| node_target
node_jsonpublish -->|"stores dated files"| node_target

click node_start "https://github.com/zzzmisa/japan-github-ranking/blob/master/start.js"
click node_main "https://github.com/zzzmisa/japan-github-ranking/blob/master/main.js"
click node_auth "https://github.com/zzzmisa/japan-github-ranking/blob/master/main.js"
click node_search "https://github.com/zzzmisa/japan-github-ranking/blob/master/main.js"
click node_description "https://github.com/zzzmisa/japan-github-ranking/blob/master/main.js"
click node_readmecheck "https://github.com/zzzmisa/japan-github-ranking/blob/master/main.js"
click node_ranked "https://github.com/zzzmisa/japan-github-ranking/blob/master/main.js"
click node_readmerender "https://github.com/zzzmisa/japan-github-ranking/blob/master/main.js"
click node_jsonpublish "https://github.com/zzzmisa/japan-github-ranking/blob/master/main.js"

classDef toneNeutral fill:#f8fafc,stroke:#334155,stroke-width:1.5px,color:#0f172a
classDef toneBlue fill:#dbeafe,stroke:#2563eb,stroke-width:1.5px,color:#172554
classDef toneAmber fill:#fef3c7,stroke:#d97706,stroke-width:1.5px,color:#78350f
classDef toneMint fill:#dcfce7,stroke:#16a34a,stroke-width:1.5px,color:#14532d
classDef toneRose fill:#ffe4e6,stroke:#e11d48,stroke-width:1.5px,color:#881337
classDef toneIndigo fill:#e0e7ff,stroke:#4f46e5,stroke-width:1.5px,color:#312e81
classDef toneTeal fill:#ccfbf1,stroke:#0f766e,stroke-width:1.5px,color:#134e4a
class node_start,node_main toneBlue
class node_auth,node_search,node_description,node_readmecheck,node_ranked,node_target toneAmber
class node_readmerender,node_jsonpublish,node_github toneMint
class node_scheduler toneIndigo
```

## Components

### Action entry

- [Action launcher](https://github.com/zzzmisa/japan-github-ranking/blob/master/start.js): `start.js`
- [Workflow coordinator](https://github.com/zzzmisa/japan-github-ranking/blob/master/main.js): `main.js`

### Repository ranking

- [GitHub App auth](https://github.com/zzzmisa/japan-github-ranking/blob/master/main.js): `main.js`
- [Repository search](https://github.com/zzzmisa/japan-github-ranking/blob/master/main.js): `main.js`
- [Description filter](https://github.com/zzzmisa/japan-github-ranking/blob/master/main.js): `main.js`
- [README validation](https://github.com/zzzmisa/japan-github-ranking/blob/master/main.js): `main.js`
- [Ranked repositories](https://github.com/zzzmisa/japan-github-ranking/blob/master/main.js): `main.js`

### Result publishing

- [README generation](https://github.com/zzzmisa/japan-github-ranking/blob/master/main.js): `main.js`
- [Dated JSON output](https://github.com/zzzmisa/japan-github-ranking/blob/master/main.js): `main.js`

### Other components

- **Daily trigger**
- **GitHub API**
- **Ranking repository**

## Connections

- Daily trigger → Action launcher: triggers
- Action launcher → Workflow coordinator: calls (evidence: `start.js`)
- Workflow coordinator → GitHub App auth: initializes (evidence: `main.js`)
- Workflow coordinator → Repository search: calls (evidence: `main.js`)
- Workflow coordinator → README validation: calls (evidence: `main.js`)
- Workflow coordinator → README generation: calls (evidence: `main.js`)
- Workflow coordinator → Dated JSON output: calls (evidence: `main.js`)
- Repository search → GitHub API: queries (evidence: `main.js`)
- Repository search → Description filter: filters (evidence: `main.js`)
- README validation → GitHub API: fetches READMEs (evidence: `main.js`)
- README validation → Ranked repositories: formats results (evidence: `main.js`)
- README generation → GitHub API: reads and updates (evidence: `main.js`)
- Dated JSON output → GitHub API: writes dated JSON (evidence: `main.js`)
- README generation → Ranking repository: updates README (evidence: `main.js`)
- Dated JSON output → Ranking repository: stores dated files (evidence: `main.js`)