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ns-devin-core

v0.3.0

Published

Shared Devin (Cognition Cascade) protocol core — credentials, model discovery, Connect streaming; a dependency, not for direct install

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ngosangnsngosangns

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Readme

ns-devin-core

Shared host-neutral core for Devin (Cognition Cascade): the Connect/protobuf wire protocol, PKCE + API-key credentials, model discovery, and the DevinStreamEvent streaming vocabulary. The Devin vendor core of ns-bridge: a dependency of the Devin host adapters (@ngosangns/ns-pi-provider, ns-omp-provider, ns-dsh-llm-devin) — not meant to be installed or configured directly.

Engine

Since 0.3.0 the public entry points (streamDevin, fetchDevinModels, fetchDevinUsage) run in the ns-bridge Go sidecar when a binary is installed (ns-bridge-bin, NS_BRIDGE_BIN, or ns-bridge on PATH), and in this package's TypeScript otherwise. NS_BRIDGE_ENGINE=ts (or NS_BRIDGE_ENGINE_DEVIN=ts) keeps everything in-process; …InProcess exports always do. The credential store and model cache stay in TypeScript.

The TypeScript implementation is now the fallback. A later major release is expected to slim this package to the facade, types and credential stores, with the protocol living in the binary only; nothing changes for callers of the exports above.

What it does

  • streamDevin(request) — one Cascade turn: GetUserJwt (session → user JWT + optional edge URL), AssignModel for router models, then GetChatMessage over Connect server-streaming framed protobuf (application/connect+proto, gzip envelopes, end-of-stream JSON trailers).
  • fetchDevinModels() — GetCliModelConfigs under the pinned CLI identity, normalized onto DevinModelSpec with effort-lane collapse (effortMap).
  • resolveDevinCredentials() / saveDevinCredentials() — the CLI credential store at ~/.local/share/devin/credentials.toml, shared with devin auth.
  • loginDevinWithPkce() — the CLI's browser PKCE flow against app.devin.ai.
  • fetchDevinUsage() — plan tier, credit buckets, and daily/weekly quota windows from SeatManagementService/GetUserStatus.
  • streamDevinWithCapacityRetry(request, options) — streamDevin plus a bounded retry on capacity/overload errors raised before any output was delivered. For hosts with no retry loop of their own (Pi, OMP); the Harness has one and calls streamDevin directly.
  • A hand-rolled protobuf runtime (proto/protobuf.ts) plus the vendored Cascade message surface (proto/devin-messages.ts).

Upstream

The Cascade client is ported from oh-my-pi's built-in Devin provider (@oh-my-pi/pi-ai providers/devin.ts, @oh-my-pi/pi-catalog discovery/devin.ts + wire/devin.ts, MIT, https://github.com/can1357/oh-my-pi). Last synced against 18.8.4: Fusion lead routing, the legacy Windsurf Enterprise catalog fallback, the raw-key retry after a 401, and strict final tool-argument parsing. Host-specific hooks (onPayload) and pure refactors are not carried over.