Adds the official ByteDance TRAE CLI (the `traecli` binary documented at
https://docs.trae.cn/cli — the product paired with the Trae IDE, not the
open-source bytedance/trae-agent) as a built-in agent backend. traecli is
ACP-native, so it is driven over the standard ACP JSON-RPC transport via
`traecli acp serve --yolo`, reusing the shared hermesClient exactly like the
Kiro and Qoder backends.
Validated end-to-end against the real traecli v0.120.42 with a logged-in
account: initialize advertises loadSession:true + mcpCapabilities{http,sse};
session/new returns result.sessionId + models.availableModels (18 models
discovered); session/prompt streams session/update notifications with
sessionUpdate=agent_message_chunk (hermesClient already normalizes this Zed-ACP
wire shape); a real board task ran 14 tool calls and completed in ~47s.
Implementation:
- server/pkg/agent/traecli.go: ACP backend; session/load resume
(loadSession:true), session/set_model, MCP via ACP mcpServers, --yolo
bypass-permissions for headless runs, blocked-arg filtering (acp, serve,
--yolo, --print, --output-format, --permission-mode)
- agent.go: New() + launch header "traecli acp serve"
- models.go: discoverTraecliModels via the shared discoverACPModels
- daemon/config.go: auto-detect the `traecli` binary
(MULTICA_TRAECLI_PATH / MULTICA_TRAECLI_MODEL)
- daemon.go: inline the runtime brief (traecli reads .trae/rules/, not
AGENTS.md) and surface the runtime as "Trae" (providerDisplayName)
- execenv: AGENTS.md + .traecli/skills wiring; ~/.traecli/skills local root
- packages/core mcp-support: traecli consumes mcp_config
- frontend: official Trae provider logo
- docs: providers.mdx matrix + section, CLI_AND_DAEMON.md, README
Tests: fake-ACP unit tests matching the real wire format (streaming,
blocked-arg filtering, session/set_model failure, session/load resume) plus a
gated real-binary smoke test (TestTraecliRealACPSmoke) that skips when traecli
is absent or not logged in. Built-in provider only (mirrors qoder): not in
SupportedTypes / RUNTIME_PROFILE_PROTOCOL_FAMILIES, so no migration is needed.
Resolves#4376.
