pi-devin-local

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A Pi package that uses Devin Local models inside Pi.

Pi stays the harness. The Devin CLI owns login and the live model catalog (devin auth, devin models list). This is not an ACP integration and does not use Zed.

Fork of kashyab12/pi-devin (npm pi-devin) with fixes that upstream does not carry yet — see What this fork changes. Do not install both: they register the same devin provider.

Why this exists

pi-devin-auth treated Devin as Cascade cloud chat. Models like Sol High, Opus 5, and Fable 5 then failed with:

This model is only in Devin Local.

Those models are available through the local Devin CLI. This package uses that CLI for auth + catalog, then streams completions into Pi so Pi's tools, sessions, and UI stay in charge.

Requirements

• Pi Coding Agent 0.80+
• A signed-in Devin CLI (devin auth status), or a signed-in Devin Desktop
• Node 18+

The CLI binary is resolved in this order:

1. $DEVIN_CLI
2. ~/.local/bin/devin, Homebrew, /usr/local/bin/devin
3. Devin.app's bundled devin binary
4. which devin

Install

From npm (listed in the package gallery):

pi install npm:pi-devin-local

From git:

pi install git:github.com/mizorewww/pi-devin

Local checkout:

pi install ~/Developers/pi-devin

Restart Pi or run /reload. The Chinese README is at README_zh.md (named without a dot so npm keeps English as the package page default).

Upstream is npm:pi-devin; it does not carry this fork's fixes and must not be installed alongside this one.

Usage

/login devin
/model devin/swe-2
/model devin/claude-opus-5
/model devin/gpt-5.6-sol

Models keep their family id; thinking levels belong to pi and each level is resolved to the matching Devin variant. For SWE-2:

pi thinking level	model uid sent
medium	swe-2-medium
high (default)	swe-2-high
max	swe-2-max

Use /thinking or shift+tab to change the level; levels a family does not ship are hidden, and Ctrl+S in /thinking saves the startup default. The same applies to every other family (devin/kimi-k3, devin/grok-4.6, …).

/login devin seeds ~/.local/share/devin/credentials.toml from a Devin Desktop sign-in you already have, and otherwise runs devin auth login.

Thinking: the server streams a summary of the model's reasoning; the full trace stays inside the sealed signature and never leaves the server. Pi keeps that summary together with its signature and replays both on the next request, exactly like the Devin CLI, so the model keeps its own prior reasoning across tool calls and turns.

Commands:

• /devin-status — CLI path, version, auth
• /devin-refresh — reload devin models list --format json

What this is / is not

This package	Not this package
Pi is the agent	Devin taking over the session
Devin CLI for auth + catalog	Fake Windsurf OAuth paste flow
Live CLI families (Opus 5, Fable 5, Sol, …)	Hardcoded 11-model cloud allowlist
Completions streamed into Pi tools	An editor host for Devin

What this fork changes

Everything upstream does, plus:

• Reuses a Devin Desktop sign-in. Desktop keeps its token in the Electron state DB, so the CLI store stayed empty and /login devin opened a browser for an account that was already signed in. The store is now seeded from windsurfAuthStatus when it is missing.
• One model per family, thinking levels via Pi. devin/swe-2 + /thinking max sends swe-2-max; levels a family does not ship are hidden instead of silently falling back to the default variant.
• Thinking round-trips. The server's thinking summary, its sealed signature and the redacted flag are kept on the block and replayed on the next request, like the Devin CLI does, so the model keeps its own prior reasoning.
• Request shape aligned with the Devin CLI. System prompt in the server's system slot, matching sampling configuration, trajectory reference and planner mode, no stray execution_id.

Publish

bun run typecheck
npm publish --access public

This is a standard Pi package (keywords: ["pi-package"] + pi.extensions). Once it is on npm with that keyword it is picked up by the package gallery within minutes — there is no separate submission step, and pi has no official namespace for third-party extensions. If it does not show up, bump the version and publish again to force re-indexing.

License

MIT. Unofficial. Not affiliated with Cognition.