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4b9ea4aa68
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.