feat(acp): add MiniMax Code backend

[imshunsuke]

Summary

• Add MiniMax Code as a native local ACP backend through mcode acp.
• Reuse the shared backend catalog and local ACP driver path, including MiniMax installation, onboarding, runtime configuration, and bilingual documentation.
• Configure MiniMax full-permission mode through its native ACP permissionMode=bypassPermissions session option.
• Add catalog, CLI, server, configuration, installation, onboarding, and managed-backend regression coverage.
• Fix TUI test output buffering under Node.js 26; no TUI production code is changed.

Validation

• npm run lint
• npm test
• npm run build
• npm run release:check
• git diff --check
• Local MiniMax installation/setup detection and ACP initialize/session configuration smoke check (mcode 0.2.7).
• No real model request was sent during the smoke check.

Compatibility and Security

• No new dependency was added.
• No secrets, user data, logs, or internal addresses are committed.
• The default permission behavior remains unchanged; full permissions are mapped only to MiniMax Code’s native bypass mode.
• Installation remains explicit and user-confirmed.
• ZCode is not included.
• package-lock.json and TUI production code are not included.

[Copilot]

🟢 Approval recommended

The MiniMax backend integration is consistently wired through catalog/config/driver layers with explicit permission-mode mapping and broad automated test coverage for the new behavior.

Pull request overview

Adds MiniMax Code as a first-class local ACP (stdio) backend (mcode acp) integrated into the shared backend catalog so the CLI, desktop UI, and Gateway can detect/install/onboard it consistently, including support for mapping “full permission” to MiniMax’s native permissionMode=bypassPermissions.

Changes:

• Add MiniMax backend metadata (install steps, onboarding command, env/workspace wiring) and register it across runtime config and UI labels.
• Add ACP driver/profile support for running mcode acp, including permission-mode mapping to bypassPermissions.
• Expand regression coverage across catalog/config/selection/install/environment/managed-backend behavior and fix Node.js 26 TUI test output buffering.

File summaries

File	Description
tui/test/index.test.mjs	Fixes stdout buffering assertions by draining all available chunks under newer Node stream behavior.
test/backend-catalog.test.mjs	Verifies MiniMax backend definition (label, command, integration, permissions, skills=null).
shared/runtime-environment.mjs	Adds MiniMax workspace resolution and exposes it via loadRuntimeEnvironment output.
shared/backend-catalog.mjs	Adds MiniMax backend catalog entry including install/onboarding metadata and env prefix.
server/test/managed-backend.test.mjs	Ensures MiniMax is treated as an additional managed ACP backend.
server/test/dependency-boundaries.test.mjs	Updates “named backend” detection regex to include MiniMax.
server/test/config.test.mjs	Extends workspace/model-mapping/config-override behaviors to include MiniMax.
server/test/backend-onboarding.test.mjs	Adds expected onboarding command for MiniMax (mcode login).
server/test/backend-install.test.mjs	Adds install support expectations for MiniMax (script URLs + confirmation).
server/test/backend-environment.test.mjs	Validates MiniMax env projection stays isolated from unrelated credential namespaces.
server/test/agent-client-selection.test.mjs	Adds MiniMax to protocol selection matrix and workspace directory expectations.
server/test/acp-backend-adapter.test.mjs	Verifies MiniMax ACP profile uses permissionMode=bypassPermissions when “full” is requested.
server/src/core/config.mjs	Adds MiniMax backend config (model, workspace, cliPath via MINIMAX_CODE_BIN).
server/src/agent/backends/local-acp.mjs	Registers MiniMax local ACP driver (mcode acp) with session option mapping for “full”.
README.md	Adds MiniMax Code to backend support table.
README_ZH.md	Adds MiniMax Code to backend support table (ZH).
PRIVACY.md	Updates backend examples list to include Qwen Code + MiniMax Code.
package.json	Adds minimax-code keyword.
docs/index.zh.md	Mentions MiniMax Code among supported agents.
docs/index.md	Mentions MiniMax Code among supported agents.
docs/gateway-protocol.zh.md	Adds MiniMax Code to reference backend examples.
docs/gateway-protocol.md	Adds MiniMax Code to reference backend examples.
docs/configuration/backend.zh.md	Adds MiniMax install/config docs, and clarifies skills.sh limitation for MiniMax.
docs/configuration/backend.md	Adds MiniMax install/config docs, and clarifies skills.sh limitation for MiniMax.
docs/backends/overview.zh.md	Adds MiniMax to backend overview table and clarifies skill management behavior.
docs/backends/overview.md	Adds MiniMax to backend overview table and clarifies skill management behavior.
docs/architecture/overview.zh.md	Adds MiniMax Code to architecture backend examples.
docs/architecture/overview.md	Adds MiniMax Code to architecture backend examples.
docs/architecture/deep-dive.zh.md	Adds MiniMax Code to ACP backend lists and MCP-injection description.
docs/architecture/deep-dive.md	Adds MiniMax Code to ACP backend lists and MCP-injection description.
desktop/src/settings.js	Adds MiniMax Code label mapping in backend settings UI.
cli/test/runtime.test.mjs	Adds MiniMax to named-local-ACP backend resolution test matrix.
cli/test/runtime-environment.test.mjs	Ensures MiniMax workspace is included/excluded appropriately in runtime env setup.
cli/test/backend-setup.test.mjs	Adds MiniMax installation detection test via mcode presence.
cli/test/arguments.test.mjs	Allows --backend minimax as a named local ACP backend without backend URL.
CHANGELOG.md	Documents MiniMax backend support and ownership of login/model/provider settings.
.env.example	Adds MiniMax to backend list and documents MINIMAX_CODE_* configuration knobs.

Review details

• Files reviewed: 37/37 changed files
• Comments generated: 0
• Review effort level: Lite

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[Copilot]

🟢 Approval recommended

The MiniMax backend is integrated consistently across catalog/driver/config/docs and is backed by targeted regression tests, with no confirmed functional issues in the reviewed diffs.

Review details

• Files reviewed: 37/37 changed files
• Comments generated: 0 new
• Review effort level: Lite