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next-ai-draw-io/env.example
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Dayuan Jiang 60105ddb51 refactor: remove dead code and over-engineering found by two audits (#986) 
## Problem

Two audits of the repository (a workflow of finder, dedup and per-file verifier agents, run on 2026-10-11 against 1f4141e and again against 07f3e3c after a first round of refactoring) found dead code and features that were more machinery than the app needs: an Electron configuration-preset system with its own settings window, three copies of the about page, a hand-written `.env` parser, an "extended" system prompt nobody selected, two data migrations for formats from 2025-12 and 2026-01, a server-side example cache, type-to-confirm provider deletion, 81 unused dictionary keys, wrapper components around single call sites, and a long tail of unused exports, props, options and tests.

## Change

Every item below was either approved one by one or covered by "fix all of the others".

- **Electron:** the configuration-preset system is gone (settings window, preload, IPC, menu entry, dev watcher); `config-manager.ts` keeps only `userLocale`; `.env` files are parsed with `dotenv`. Entitlements file and a duplicate CI workflow removed; `test.yml` gets a type check and concurrency.
- **Server:** no extended prompt, no example cache, no `ENABLE_HISTORY_XML_REPLACE`, no message metadata or `hasConfig`; the connection test is one shared helper; EdgeOne loses its mock branch and model aliases; `DEBUG_LLM_PAYLOAD` logs message structure instead of payloads; Langfuse scoring helper; `apiKeyEnv` arrays kept and documented in `env.example` and the provider docs.
- **Pages:** one about page per language from a single component (old `/cn` and `/ja` URLs redirect with 308); layout uses `hasLocale`; the GitHub icon is a local component instead of `react-icons`; Cloudflare deploys without an R2 cache by default.
- **Chat and canvas:** the legacy `diagramHistory` conversion, the localStorage chat migration and the templates storage are gone; `chat-engine` reads the diagram through the context's refs; the diagram context has one tagged export path (`requestTaggedExport` / `fetchDiagramXml`); the screenshot check uses fetch + JSON and `generateText` with `Output.object`; `load-diagram` accepts `<svg:svg>` and strips the XML prolog.
- **Settings UI:** `model-selector` inlines its Dialog, Command and Tooltip; `ai-elements/model-selector`, `button-with-tooltip`, `error-toast` removed; no type-to-confirm, no footer, no `bedrockApiKey`; `use-model-config` loses the old-format migration; one reasoning component; the shimmer is CSS (no `motion`, no `@radix-ui/react-use-controllable-state`); 81 dictionary keys removed in all four languages.
- **MCP server:** `registerTool` / `ok` / `fail` replace per-tool try/catch; `syncFromBrowser`, `commitDocument`, `describePages`; the hand-written XML syntax check, unused result fields, `pickPageSelector`, `expandStyles` and the `host` attribute handling are gone; tests get a shared `setup.ts` and drive the server through the SDK client.
- **Prompt:** the web app's style rules come from the MCP drawing guide (`styleRules`), byte-identical to before.
- **Tests:** shared e2e helpers (`openApp`, `sse`, `toolCallEvents`, `chunkedReplies`); placeholder specs dropped; `settings-review-fixes` split by topic; unit tests use `vi.stubEnv`.
- **Dependencies removed:** `@xmldom/xmldom`, `remark-gfm`, `@anthropic-ai/tokenizer`, `@testing-library/user-event`, `concurrently`, `wait-on`, `eslint`, `eslint-config-next`, `@vitest/coverage-v8`, `shx`, `motion`, `@radix-ui/react-use-controllable-state`, `react-icons`.

Source lines: 74,983 before, 67,418 after (excluding lockfiles).

The last commit merges #984 (the canvas shell). Where the shell, the classic page or their tests depend on a wire format or signature this branch had changed, main's version wins (export fields of the poll response, `addHistory` signature); where main only extended code this branch restructured, main's change is carried into the new structure (`start_session`, `get_selection`, `prepareNewDiagram`, the diagram context's `requestExport`).

## Testing

- `tsc --noEmit` for the web app, `packages/mcp-server`, its shell and `electron`: clean
- `biome ci`: 0 errors (37 pre-existing warnings)
- Root `vitest run`: 719 passed; `packages/mcp-server` `vitest run`: 372 passed
- `next build`: clean
- Playwright, whole web suite on the dev server (4 workers): 280 tests, 279 passed; `language.spec.ts` "a stale offer to switch without saving does nothing once a message is being sent" failed under parallel load and passed alone, as it does on main
2026-10-12 12:35:55 +09:00

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# AI Provider Configuration
# AI_PROVIDER: Which provider to use
# Options: bedrock, openai, anthropic, google, vertexai, azure, ollama, openrouter, aihubmix, deepseek, siliconflow, sglang, gateway, edgeone, doubao, modelscope, glm, qwen, qiniu, kimi, minimax, novita, mimo, atlascloud
# Default: bedrock
AI_PROVIDER=bedrock
# AI_MODEL: The model ID for your chosen provider (REQUIRED)
# Tip: For a single-provider quick multi-model setup, list comma-separated model IDs.
# The first one becomes the default and the rest appear in the model picker.
# For multiple providers or custom apiKeyEnv/baseUrlEnv, use AI_MODELS_CONFIG / ai-models.json instead.
# There, apiKeyEnv may also be an array of env var names: each request picks one that has a value at random.
# Example: AI_MODEL=doubao-seed-1-8-251215,doubao-seed-1-6-flash,doubao-seed-1-6-pro
AI_MODEL=global.anthropic.claude-sonnet-4-5-20250929-v1:0
# Output limit, all providers (default: 64000). Shared by reasoning and the diagram XML,
# so a thinking model can spend it all before the tool call. Users can lower it in Settings,
# and raise it only when they use their own API key, so this also caps cost on server keys.
# If a model's own ceiling is lower, the request is retried with that ceiling automatically.
# MAX_OUTPUT_TOKENS=64000
# AWS Bedrock Configuration
# AWS_REGION=us-east-1
# AWS_ACCESS_KEY_ID=your-access-key-id
# AWS_SECRET_ACCESS_KEY=your-secret-access-key
# Note: Claude and Nova models support reasoning/extended thinking
# BEDROCK_REASONING_BUDGET_TOKENS=12000 # Optional: Claude reasoning budget in tokens (1024-64000)
# BEDROCK_REASONING_EFFORT=medium # Optional: Nova reasoning effort (low/medium/high)
# OpenAI Configuration
# OPENAI_API_KEY=sk-...
# OPENAI_BASE_URL=https://api.openai.com/v1 # Optional: Custom OpenAI-compatible endpoint
# Note: o1/o3/gpt-5 models automatically enable reasoning summary (default: detailed)
# OPENAI_REASONING_EFFORT=low # Optional: Reasoning effort (minimal/low/medium/high) - for o1/o3/gpt-5
# OPENAI_REASONING_SUMMARY=detailed # Optional: Override reasoning summary (none/brief/detailed)
# Anthropic (Direct) Configuration
# ANTHROPIC_API_KEY=sk-ant-... # Sent as `x-api-key` header
# ANTHROPIC_AUTH_TOKEN= # Alternative to ANTHROPIC_API_KEY; sent as `Authorization: Bearer` header (mutually exclusive)
# ANTHROPIC_BASE_URL=https://your-custom-anthropic/v1
# ANTHROPIC_THINKING_TYPE=enabled # Optional: Anthropic extended thinking (enabled)
# ANTHROPIC_THINKING_BUDGET_TOKENS=12000 # Optional: Budget for extended thinking in tokens
# Google Generative AI Configuration
# GOOGLE_GENERATIVE_AI_API_KEY=...
# GOOGLE_BASE_URL=https://generativelanguage.googleapis.com/v1beta # Optional: Custom endpoint
# GOOGLE_TOP_K=40 # Optional: Top K sampling parameter
# GOOGLE_TOP_P=0.95 # Optional: Nucleus sampling parameter
# Note: Gemini 2.5/3 models automatically enable reasoning display (includeThoughts: true)
# GOOGLE_THINKING_BUDGET=8192 # Optional: Gemini 2.5 thinking budget in tokens (for more/less thinking)
# GOOGLE_THINKING_LEVEL=high # Optional: Gemini 3 thinking level (low/high)
# Google Vertex AI Configuration (Enterprise GCP)
# For enterprise users needing data residency, VPC Service Controls, or GCP integration
# GOOGLE_VERTEX_API_KEY= # Required: Express Mode API key
# GOOGLE_VERTEX_BASE_URL=https://... # Optional: Custom endpoint URL
# Note: Gemini 2.5/3 models automatically enable reasoning display (includeThoughts: true)
# GOOGLE_VERTEX_THINKING_BUDGET=8192 # Optional: Gemini 2.5 thinking budget in tokens (1024-100000)
# GOOGLE_VERTEX_THINKING_LEVEL=high # Optional: Gemini 3 thinking level (minimal/low/medium/high)
# Azure OpenAI Configuration
# Configure endpoint using ONE of these methods:
# 1. AZURE_RESOURCE_NAME - SDK constructs: https://{name}.openai.azure.com/openai/v1{path}
# 2. AZURE_BASE_URL - SDK appends /v1{path} to your URL
# If both are set, AZURE_BASE_URL takes precedence.
# AZURE_RESOURCE_NAME=your-resource-name
# AZURE_API_KEY=...
# AZURE_BASE_URL=https://your-resource.openai.azure.com/openai # Alternative: Custom endpoint
# AZURE_REASONING_EFFORT=low # Optional: Azure reasoning effort (low, medium, high)
# AZURE_REASONING_SUMMARY=detailed
# Ollama Configuration (Local or Cloud)
# OLLAMA_BASE_URL=https://ollama.com/api # Optional: Ollama Cloud; defaults to local Ollama (http://127.0.0.1:11434/api)
# OLLAMA_API_KEY=your-ollama-cloud-api-key # Optional: For Ollama Cloud or authenticated remote instances
# OLLAMA_ENABLE_THINKING=true # Optional: Enable thinking for models that support it (e.g., qwen3)
# OpenRouter Configuration
# OPENROUTER_API_KEY=sk-or-v1-...
# OPENROUTER_BASE_URL=https://openrouter.ai/api/v1 # Optional: Custom endpoint
# AIHubMix Configuration
# AIHUBMIX_API_KEY=your-aihubmix-api-key
# AIHUBMIX_BASE_URL=https://aihubmix.com/v1 # Optional: Custom endpoint
# DeepSeek Configuration
# DEEPSEEK_API_KEY=sk-...
# DEEPSEEK_BASE_URL=https://api.deepseek.com/v1 # Optional: Custom endpoint
# SiliconFlow Configuration (OpenAI-compatible)
# Base domain can be .com or .cn, defaults to https://api.siliconflow.com/v1
# SILICONFLOW_API_KEY=sk-...
# SILICONFLOW_BASE_URL=https://api.siliconflow.com/v1 # Optional: switch to https://api.siliconflow.cn/v1 if needed
# SGLang Configuration (OpenAI-compatible)
# SGLANG_API_KEY=your-sglang-api-key
# SGLANG_BASE_URL=http://127.0.0.1:8000/v1 # Your SGLang endpoint
# ModelScope Configuration
# MODELSCOPE_API_KEY=ms-...
# MODELSCOPE_BASE_URL=https://api-inference.modelscope.cn/v1 # Optional: Custom endpoint
# ByteDance Doubao Configuration (via Volcengine)
# DOUBAO_API_KEY=your-doubao-api-key
# DOUBAO_BASE_URL=https://ark.cn-beijing.volces.com/api/v3 # ByteDance Volcengine endpoint
# Vercel AI Gateway Configuration
# Get your API key from: https://vercel.com/ai-gateway
# Model format: "provider/model" e.g., "openai/gpt-4o", "anthropic/claude-sonnet-4-5"
# AI_GATEWAY_API_KEY=...
# AI_GATEWAY_BASE_URL=https://your-custom-gateway.com/v1/ai # Optional: Custom Gateway URL (for local dev or self-hosted Gateway)
# # If not set, uses Vercel default: https://ai-gateway.vercel.sh/v1/ai
# Langfuse Observability (Optional)
# Enable LLM tracing and analytics - https://langfuse.com
# LANGFUSE_PUBLIC_KEY=pk-lf-...
# LANGFUSE_SECRET_KEY=sk-lf-...
# LANGFUSE_BASEURL=https://cloud.langfuse.com # EU region, use https://us.cloud.langfuse.com for US
# Optional server-side multi-model configuration
# If set, points to a JSON file with server-provided models (see README for schema).
# Default: ./ai-models.json in project root
# AI_MODELS_CONFIG_PATH=/path/to/ai-models.json
# Temperature (Optional)
# Controls randomness in AI responses. Lower = more deterministic.
# Leave unset for models that don't support temperature (e.g., GPT-5.1 reasoning models).
# Claude 4.7 and later reject it; the request is then retried without it.
# TEMPERATURE=0
# Debug Logging (Optional)
# Log the structure of the messages each chat request sends to the model
# DEBUG_LLM_PAYLOAD=true
# Access Control (Optional)
# ACCESS_CODE_LIST=your-secret-code,another-code
# Admin Panel (Optional)
# Set a password to enable the web admin panel at /admin, where most of the
# settings in this file can be edited at runtime (stored in data/settings.json,
# which takes precedence over environment variables).
# Leave unset to disable the admin panel entirely.
# ADMIN_PASSWORD=your-admin-password
# SETTINGS_FILE=./data/settings.json # Optional: custom settings file location
# Quota & Validation (Optional, also editable in the admin panel)
# Quota enforcement is disabled unless DYNAMODB_QUOTA_TABLE is set.
# DYNAMODB_QUOTA_TABLE=next-ai-draw-io-quota # DynamoDB table that stores the per-IP counters
# DYNAMODB_REGION=ap-northeast-1 # Region of the table
# QUOTA_TIMEZONE=UTC # Timezone for the daily reset boundary
# DAILY_REQUEST_LIMIT=10 # Requests per IP per day
# DAILY_TOKEN_LIMIT=200000 # Tokens per IP per day
# TPM_LIMIT=20000 # Tokens per minute
# ENABLE_VLM_VALIDATION=true # Visually validate generated diagrams with a vision model
# VALIDATION_MODEL= # Falls back to the default AI model when empty
# VALIDATION_TIMEOUT=30000 # Validation timeout in ms
# Draw.io Configuration (Optional)
# By default the app serves its own copy of draw.io from /drawio (downloaded into
# public/drawio by `npm run dev` / `npm run build`). Same origin is required for
# highlighting AI changes, asking about selected shapes and the custom toolbar.
# NEXT_PUBLIC_DRAWIO_BASE_URL=https://embed.diagrams.net # Optional: use an external draw.io instead
# With an external draw.io the app falls back to draw.io's own toolbar and those features are off.
# Subdirectory Deployment (Optional)
# For deploying to a subdirectory (e.g., https://example.com/nextaidrawio)
# Set this to your subdirectory path with leading slash (e.g., /nextaidrawio)
# Leave empty for root deployment (default)
# NEXT_PUBLIC_BASE_PATH=/nextaidrawio
# PDF Input Feature (Optional)
# PDF file upload to extract text and generate diagrams
# NEXT_PUBLIC_MAX_EXTRACTED_CHARS=150000 # Max characters for PDF/text extraction (default: 150000)
# Security Settings (Optional)
# Allow private/internal URLs for reverse proxy setups (default: true)
# Set to "false" to block private IPs, localhost, and internal hostnames
# ALLOW_PRIVATE_URLS=false
# Behind a CDN such as Cloudflare (Optional)
# The daily quota is counted per IP. By default the IP is the first
# X-Forwarded-For entry, which visitors can set to anything. Name the header
# your CDN fills with the visitor's real IP instead:
# CLIENT_IP_HEADER=cf-connecting-ip
# Then have the CDN add an X-Origin-Secret header with this value to every
# request. API calls without it get 403, so nobody can skip the CDN and fake
# the IP header above.
# ORIGIN_SECRET=a-long-random-string
# Self-hosted deployment (Optional)
# Self-hosted users may implement custom quota-management solutions,
# which triggers the client UI to display messages suggesting self-hosting or sponsorship.
# This switch allows self-hosted users to provide custom messages in response to a 429 code,
# in messageTokenSelfHosted, messageApiSelfHosted, and tipSelfHosted translation strings.
# It also turns off the MCP server advertisement in Settings > About.
# NEXT_PUBLIC_SELFHOSTED=true
# Analytics (Optional)
# Google Analytics measurement ID; nothing is loaded when unset
# NEXT_PUBLIC_GA_ID=G-XXXXXXXXXX
# Minimax Configuration (Optional)
# Get your API key from: https://platform.minimaxi.com/docs/guides/models-intro
# MINIMAX_API_KEY=your_minimax_api_key
# MINIMAX_BASE_URL=https://api.minimaxi.com/anthropic # Optional, default (China mainland)
# GLM Configuration (Optional)
# Get your API key from: https://open.bigmodel.cn/dev/api
# GLM_API_KEY=your_glm_api_key
# GLM_BASE_URL=https://open.bigmodel.cn/api/paas/v4 # Optional, default
# Qwen Configuration (Optional)
# Get your API key from: https://www.aliyun.com/product/bailian
# QWEN_API_KEY=your_qwen_api_key
# QWEN_BASE_URL=https://dashscope.aliyuncs.com/compatible-mode/v1 # Optional, default
# Kimi Configuration (Optional)
# Get your API key from: https://platform.moonshot.cn/
# KIMI_API_KEY=your_kimi_api_key
# KIMI_BASE_URL=https://api.moonshot.cn/v1 # Optional, default
# Qiniu Configuration (Optional)
# Get your API key from: https://www.qiniu.com/ai/models
# QINIU_API_KEY=your_qiniu_api_key
# QINIU_BASE_URL=https://api.qnaigc.com/v1 # Optional, default
# Novita AI Configuration (Optional)
# Get your API key from: https://novita.ai/dashboard/key
# NOVITA_API_KEY=your_novita_api_key
# NOVITA_BASE_URL=https://api.novita.ai/openai # Optional, default
# MiMo (Xiaomi) Configuration (Optional)
# Get your API key from: https://platform.xiaomimimo.com/
# MIMO_API_KEY=your_mimo_api_key
# MIMO_BASE_URL=https://api.xiaomimimo.com/v1 # Optional, default. Token Plan users: https://token-plan-cn.xiaomimimo.com/v1
# Atlas Cloud Configuration (Optional)
# Get your API key from: https://www.atlascloud.ai/console/api-keys
# ATLASCLOUD_API_KEY=your_atlascloud_api_key
# ATLASCLOUD_BASE_URL=https://api.atlascloud.ai/v1 # Optional, default. LLM chat endpoint; media generation uses a separate API.
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