@linioi/pi-fast-mode

A pi extension that adds a protocol-aware /fast command with status indicator. It persists a local enabled flag in Pi's agent dir (fast-mode.json) and patches provider requests for supported targets:

• openai-responses → service_tier: "priority"
• openai-codex-responses → service_tier: "priority"
• anthropic-messages with claude-opus-4-6 → speed: "fast" plus anthropic-beta: fast-mode-2026-02-01

Install

# Via pi package manager
pi install npm:@linioi/pi-fast-mode

# Or from source
git clone https://github.com/RimuruW/pi-fast-mode.git
cd pi-fast-mode
pi install .

Use

/fast          # toggle on ↔ off
/fast on       # enable fast mode
/fast off      # disable fast mode
/fast status   # show current state and supported APIs

Status Indicator

| State | Footer | Meaning | | ---------- | ----------- | -------------------------------------------- | | active | ⚡ fast | fast mode on, current model/API supports it | | unsupported| ⚡ n/a | fast mode on, current model/API unsupported | | off | (hidden) | fast mode off |

How It Works

When fast mode is enabled and the current model is supported, the extension applies the provider-specific fast-path patch:

{ "service_tier": "priority" }

for OpenAI responses APIs, and

{ "speed": "fast" }

plus the anthropic-beta: fast-mode-2026-02-01 request header for Claude Opus 4.6 on anthropic-messages.

This keeps OpenAI support as-is while matching Claude Code's fast-mode shape for Anthropic. The flag is persisted across sessions.

Project Structure

├── index.js           # Extension entry point
├── src/
│   └── logic.js       # Pure command parsing & payload injection
├── tests/
│   └── logic.test.mjs # Unit tests
├── package.json
└── README.md

No build step — pi loads JavaScript extensions directly.

Development

npm test     # run tests
npm run check
npm run prepack  # runs check before publish

License

MIT