feat: add independent managed SSH agent packages

Managed SSH previously tied remote Agent and Runtime artifacts to desktop
packaging and Host activation. Settings now manages verified Linux x64 and
arm64 .gbagent packages explicitly, with source-aligned download and update
plus offline import and export. Each package contains the signed Agent, pinned
Node, and compatible OpenCode Runtime, and project activation never downloads
one automatically.

Dedicated native CI and a protected release workflow publish deterministic,
signed cumulative catalogs to GitHub and Beijing OSS without replacing the
desktop Latest release. Desktop packaging is metadata-only, remains independent
of Agent artifacts and signing credentials, and Linux desktop releases add RPM
installers.

The managed SSH path also keeps model credentials in Main, enforces Ask as
read-only, verifies signed Agent and Runtime inputs, preserves ACP recovery, and
reports Host update cancellation and failures accurately.

Release note: 远程项目现可在“设置”中手动下载、更新或离线导入签名 Agent 包，桌面安装包与远程组件发布相互独立；Linux 桌面版同时新增 RPM 安装包。

.github/workflows/agents.yml

@@ -0,0 +1,313 @@
+name: GoodBuddy Agents
+
+on:
+  workflow_dispatch:
+  pull_request:
+    paths:
+      - '.github/workflows/agents.yml'
+      - 'agent-runtime-lock.json'
+      - 'build/agent-bundle.cjs'
+      - 'build/agent-package.cjs'
+      - 'build/agent-ci-bundle.cjs'
+      - 'build/file-hash.cjs'
+      - 'build/remote-runtime-bundle.cjs'
+      - 'build/signing-key-preflight.cjs'
+      - 'package-lock.json'
+      - 'package.json'
+      - 'resources/agent-release-keys.json'
+      - 'remote-runtime-lock.json'
+      - 'src/agent-daemon/**'
+      - 'src/shared/**'
+      - 'tests/agent-bundle.test.ts'
+      - 'tests/agent-package.test.ts'
+      - 'tests/agents-workflow.test.ts'
+      - 'tests/remote-runtime-bundle.test.ts'
+  push:
+    branches:
+      - main
+    paths:
+      - '.github/workflows/agents.yml'
+      - 'agent-runtime-lock.json'
+      - 'build/agent-bundle.cjs'
+      - 'build/agent-package.cjs'
+      - 'build/agent-ci-bundle.cjs'
+      - 'build/file-hash.cjs'
+      - 'build/remote-runtime-bundle.cjs'
+      - 'build/signing-key-preflight.cjs'
+      - 'package-lock.json'
+      - 'package.json'
+      - 'resources/agent-release-keys.json'
+      - 'remote-runtime-lock.json'
+      - 'src/agent-daemon/**'
+      - 'src/shared/**'
+      - 'tests/agent-bundle.test.ts'
+      - 'tests/agent-package.test.ts'
+      - 'tests/agents-workflow.test.ts'
+      - 'tests/remote-runtime-bundle.test.ts'
+
+permissions:
+  contents: read
+
+concurrency:
+  group: agents-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  validate:
+    name: Validate Agent source
+    runs-on: ubuntu-24.04
+    timeout-minutes: 15
+
+    steps:
+      - uses: actions/checkout@v7
+
+      - uses: actions/setup-node@v7
+        with:
+          node-version: 24.19.0
+          cache: npm
+
+      - name: Install dependencies
+        run: npm ci
+
+      - name: Validate Agent source and workflow
+        run: |
+          npm test -- \
+            tests/agent-bundle.test.ts \
+            tests/agent-package.test.ts \
+            tests/remote-runtime-bundle.test.ts \
+            tests/agents-workflow.test.ts
+          npm run typecheck
+
+  build:
+    name: Build Linux ${{ matrix.arch }} Agent
+    needs: validate
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - arch: x64
+            runner: ubuntu-24.04
+          - arch: arm64
+            runner: ubuntu-24.04-arm
+    runs-on: ${{ matrix.runner }}
+    timeout-minutes: 20
+
+    steps:
+      - uses: actions/checkout@v7
+
+      - uses: actions/setup-node@v7
+        with:
+          node-version: 24.19.0
+          cache: npm
+
+      - name: Install dependencies
+        run: npm ci
+
+      - name: Resolve locked official Node runtime
+        id: runtime
+        shell: bash
+        env:
+          AGENT_ARCH: ${{ matrix.arch }}
+        run: |
+          set -euo pipefail
+          node - <<'NODE'
+          const { appendFileSync } = require('node:fs')
+          const lock = require('./agent-runtime-lock.json')
+          const target = lock.node?.targets?.[`linux-${process.env.AGENT_ARCH}`]
+          if (
+            !target ||
+            !/^[A-Za-z0-9._-]+\.tar\.gz$/u.test(target.archive) ||
+            !/^[a-f0-9]{64}$/u.test(target.sha256)
+          ) {
+            throw new Error('Locked Agent Node runtime metadata is invalid')
+          }
+          const url = new URL(target.archive, lock.node.source)
+          if (
+            url.protocol !== 'https:' ||
+            url.hostname !== 'nodejs.org' ||
+            url.username ||
+            url.password ||
+            url.search ||
+            url.hash
+          ) {
+            throw new Error('Agent Node runtime must use the official HTTPS origin')
+          }
+          appendFileSync(
+            process.env.GITHUB_OUTPUT,
+            [
+              `archive=${target.archive}`,
+              `sha256=${target.sha256}`,
+              `url=${url.href}`,
+              ''
+            ].join('\n')
+          )
+          NODE
+
+      - name: Cache verified Node runtime input
+        uses: actions/cache@v6
+        with:
+          path: ${{ runner.temp }}/goodbuddy-agent-node
+          key: goodbuddy-agent-ci-node-${{ matrix.arch }}-${{ steps.runtime.outputs.sha256 }}
+
+      - name: Acquire and verify locked Node runtime
+        shell: bash
+        env:
+          NODE_ARCHIVE: ${{ steps.runtime.outputs.archive }}
+          NODE_SHA256: ${{ steps.runtime.outputs.sha256 }}
+          NODE_URL: ${{ steps.runtime.outputs.url }}
+        run: |
+          set -euo pipefail
+          directory="$RUNNER_TEMP/goodbuddy-agent-node"
+          archive="$directory/$NODE_ARCHIVE"
+          mkdir -p "$directory"
+          if [[ ! -f "$archive" ]]; then
+            rm -f "$archive.partial"
+            curl --proto '=https' --tlsv1.2 \
+              --fail --silent --show-error --location \
+              --retry 3 --retry-all-errors \
+              --connect-timeout 15 --max-time 300 \
+              --max-filesize 104857600 \
+              "$NODE_URL" --output "$archive.partial"
+            mv "$archive.partial" "$archive"
+          fi
+          printf '%s  %s\n' "$NODE_SHA256" "$archive" |
+            sha256sum --check --strict -
+
+      - name: Resolve locked OpenCode Runtime
+        id: opencode
+        shell: bash
+        env:
+          AGENT_ARCH: ${{ matrix.arch }}
+        run: |
+          set -euo pipefail
+          node - <<'NODE'
+          const { appendFileSync } = require('node:fs')
+          const { createHash: hash } = require('node:crypto')
+          const lock = require('./remote-runtime-lock.json')
+          const runtime = lock.runtimes?.opencode
+          const target = runtime?.targets?.[process.env.AGENT_ARCH]
+          if (
+            !runtime ||
+            !target ||
+            !/^[a-z0-9][a-z0-9._-]*$/u.test(target.package) ||
+            !/^\d+\.\d+\.\d+(?:-[0-9A-Za-z.-]+)?$/u.test(runtime.version) ||
+            !/^sha512-[A-Za-z0-9+/]+={0,2}$/u.test(target.integrity)
+          ) {
+            throw new Error('Locked OpenCode Runtime metadata is invalid')
+          }
+          const archive = `${target.package}-${runtime.version}.tgz`
+          appendFileSync(
+            process.env.GITHUB_OUTPUT,
+            [
+              `package=${target.package}`,
+              `version=${runtime.version}`,
+              `integrity=${target.integrity}`,
+              `archive=${archive}`,
+              `cache-key=${hash('sha256').update(target.integrity).digest('hex')}`,
+              ''
+            ].join('\n')
+          )
+          NODE
+
+      - name: Cache verified OpenCode Runtime input
+        uses: actions/cache@v6
+        with:
+          path: ${{ runner.temp }}/goodbuddy-opencode-runtime
+          key: goodbuddy-agent-ci-opencode-${{ matrix.arch }}-${{ steps.opencode.outputs.cache-key }}
+
+      - name: Acquire and verify locked OpenCode Runtime
+        shell: bash
+        env:
+          OPENCODE_ARCHIVE: ${{ steps.opencode.outputs.archive }}
+          OPENCODE_INTEGRITY: ${{ steps.opencode.outputs.integrity }}
+          OPENCODE_PACKAGE: ${{ steps.opencode.outputs.package }}
+          OPENCODE_VERSION: ${{ steps.opencode.outputs.version }}
+        run: |
+          set -euo pipefail
+          directory="$RUNNER_TEMP/goodbuddy-opencode-runtime"
+          archive="$directory/$OPENCODE_ARCHIVE"
+          mkdir -p "$directory"
+          if [[ ! -f "$archive" ]]; then
+            npm pack \
+              --ignore-scripts \
+              --registry https://registry.npmjs.org/ \
+              --pack-destination "$directory" \
+              "$OPENCODE_PACKAGE@$OPENCODE_VERSION"
+          fi
+          node - "$archive" "$OPENCODE_INTEGRITY" <<'NODE'
+          const { createHash } = require('node:crypto')
+          const { readFileSync, statSync } = require('node:fs')
+          const [archive, expected] = process.argv.slice(2)
+          const size = statSync(archive).size
+          if (size <= 0 || size > 536870912) {
+            throw new Error('OpenCode Runtime archive exceeds its safety limit')
+          }
+          const actual = `sha512-${createHash('sha512')
+            .update(readFileSync(archive))
+            .digest('base64')}`
+          if (actual !== expected) {
+            throw new Error('OpenCode Runtime archive integrity mismatch')
+          }
+          NODE
+
+      - name: Run native Agent regressions
+        run: |
+          npm test -- \
+            src/agent-daemon/model-bridge.test.ts \
+            src/agent-daemon/lifecycle.test.ts
+
+      - name: Build and verify ephemeral signed compound Agent package twice
+        id: agent
+        shell: bash
+        env:
+          AGENT_ARCH: ${{ matrix.arch }}
+          NODE_ARCHIVE: ${{ steps.runtime.outputs.archive }}
+          OPENCODE_ARCHIVE: ${{ steps.opencode.outputs.archive }}
+        run: |
+          set -euo pipefail
+          directory="$RUNNER_TEMP/goodbuddy-agent-ci"
+          rm -rf "$directory"
+          mkdir -p "$directory"
+          agent_version="$(node -p "require('./agent-runtime-lock.json').agentVersion")"
+          node build/agent-ci-bundle.cjs \
+            --arch "$AGENT_ARCH" \
+            --node-archive "$RUNNER_TEMP/goodbuddy-agent-node/$NODE_ARCHIVE" \
+            --opencode-archive "$RUNNER_TEMP/goodbuddy-opencode-runtime/$OPENCODE_ARCHIVE" \
+            --output-directory "$directory/bundle" \
+            --archive "$directory/goodbuddy-agent-$agent_version-linux-$AGENT_ARCH.gbagent" |
+            tee "$directory/result.json"
+          node - <<'NODE'
+          const { appendFileSync, readFileSync } = require('node:fs')
+          const result = JSON.parse(
+            readFileSync(
+              `${process.env.RUNNER_TEMP}/goodbuddy-agent-ci/result.json`,
+              'utf8'
+            )
+          )
+          if (
+            result.architecture !== process.env.AGENT_ARCH ||
+            !/^[a-f0-9]{64}$/u.test(result.archiveSha256)
+          ) {
+            throw new Error('Agent CI result is invalid')
+          }
+          appendFileSync(
+            process.env.GITHUB_OUTPUT,
+            `sha256=${result.archiveSha256}\n`
+          )
+          NODE
+
+      - name: Record verified Agent build
+        shell: bash
+        env:
+          AGENT_ARCH: ${{ matrix.arch }}
+          AGENT_SHA256: ${{ steps.agent.outputs.sha256 }}
+        run: |
+          {
+            echo "### Linux $AGENT_ARCH Agent"
+            echo
+            echo "Native compound Agent, Node, and OpenCode Runtime build, test-signature verification, launch smoke, and deterministic archive comparison passed."
+            echo
+            echo "Archive SHA-256: \`$AGENT_SHA256\`"
+            echo
+            echo "The ephemeral CI key and bundle are not published."
+          } >> "$GITHUB_STEP_SUMMARY"