Files

hzhang 94f33a003a feat: initial extract of shared anthropic-compat client + translator

Extracted from Plexum-minimax-provider and Plexum-kimi-provider (both
had near-identical copies under internal/anthropic + internal/translate).
Future provider plugins (Qwen, Doubao, …) import these two packages
instead of re-implementing the protocol.

anthropic/ (~220 LOC + 6 tests):
- minimal HTTP+SSE Anthropic Messages client (POST /v1/messages,
  stream:true, parses event:/data: SSE)
- Client.UserAgent + Client.ExtraHeaders fields for per-backend
  customization (Kimi needs "claude-code/0.1.0"; MiniMax is flexible)
- non-2xx surfaces as Go error; mid-stream errors as final
  Event{Type:"error"}

translate/ (~220 LOC):
- CanonicalToAnthropic: TurnRequest → MessagesRequest
- blockToAnthropic: TextBlock / ToolUseBlock / ToolResultBlock /
  ThinkingBlock → loose ContentBlock map; preserves signatures
- Translator: per-turn state machine; anthropic.Event stream →
  canonical.TurnEvent stream (text + thinking + tool_use deltas;
  signature_delta capture; message_delta stop_reason + usage)

Both MiniMax and Kimi now import from here; their internal/* dirs are
gone. Live verified after refactor — both still answer "ready" via
plexum say.

2026-05-31 20:34:57 +01:00

2.2 KiB

Raw Blame History

Plexum-anthropic-compat-client

Shared HTTP+SSE Anthropic Messages API client + canonical ↔ Anthropic translator. Used by Plexum provider plugins that talk to any "Anthropic-compatible" endpoint (the one Anthropic itself, MiniMax, Kimi, Qwen, etc. all expose at /v1/messages).

Each provider plugin imports these two packages and adds:

its own cmd/plexum-<name>-provider-plugin/main.go entry
a list of supported model ids in the manifest
an endpoint URL + auth key + optional User-Agent override

Packages

`anthropic/`

Minimal HTTP+SSE client. Single entry point:

client := anthropic.New(baseURL, apiKey)
client.UserAgent = "claude-code/0.1.0" // optional
events, err := client.StreamMessages(ctx, anthropic.MessagesRequest{
    Model: "MiniMax-M2.7", MaxTokens: 4096,
    Messages: []anthropic.Message{...},
})
for ev := range events { /* anthropic.Event */ }

Features:

POST /v1/messages with stream: true
Parses standard SSE frames (event: + data: + blank line)
Surfaces non-2xx as HTTP error (before channel opens)
Surfaces mid-stream errors as Event{Type:"error"} final entry
UserAgent + ExtraHeaders fields for per-backend customization
5min per-call timeout

`translate/`

Bidirectional canonical-types ↔ Anthropic-types adapter:

CanonicalToAnthropic(req canonical.TurnRequest, modelID, defaultMaxTokens) → anthropic.MessagesRequest
Translator state machine consumes <-chan anthropic.Event, emits []canonical.TurnEvent per event (handles text / thinking / tool_use / signature deltas + per-block close)

Usage

In a provider plugin's go.mod:

require git.hangman-lab.top/hzhang/Plexum-anthropic-compat-client v0.0.0
replace git.hangman-lab.top/hzhang/Plexum-anthropic-compat-client => ../Plexum-anthropic-compat-client

In code:

import (
    "git.hangman-lab.top/hzhang/Plexum-anthropic-compat-client/anthropic"
    "git.hangman-lab.top/hzhang/Plexum-anthropic-compat-client/translate"
)

History

Extracted from Plexum-minimax-provider and Plexum-kimi-provider — both had a near-identical copy. New providers (Qwen, Doubao, …) drop in without re-implementing the protocol.

License

Same as Plexum.

2.2 KiB Raw Blame History