sdk migration: squashed pre-2026-06-02 work

Omnibus squash of the 10 oldest SDK-migration commits (authored 2026-05-27
through 2026-06-02), collapsed during the 2026-06-09 rebase onto origin/main.

Squashed commits:
- sdk migration: squashed pre-2026-05-27 work
- sdk migration: squashed 06-05-2026 -- instead of listHistory, use host.get(sessionId) instead
- updat gitignore
- fix xai provider
- fix(vscode): forward Bedrock region + AWS auth to the SDK gateway
- fix(vscode): keep in-progress MCP OAuth flow across reconnects
- fix(vscode): wire auto compact into SDK sessions (#11197)
- fix(vscode): compact Codex OAuth before input cap (#11194)
- fix unauthed user flow
- fix(llms): strip Cerebras reasoning history (#11214)

.github/workflows/ext-vscode-publish-nightly.yml

@@ -31,6 +31,9 @@ jobs:
     if: github.repository == 'cline/cline' && (github.ref == 'refs/heads/main' || github.ref == 'refs/heads/dpc/sdk-migration-simpler-login')
     runs-on: ubuntu-latest
     environment: PublishNightly
+    # The VS Code extension's package.json and lockfiles live under apps/vscode/
+    # (the repo root has no package.json). Mirror ext-vscode-test.yml so install
+    # and publish steps run in the correct workspace.
     defaults:
       run:
         working-directory: apps/vscode
@@ -56,6 +59,10 @@ jobs:
           # Keep publish environment aligned with test workflow/tooling lockfile expectations.
           # Newer LTS (Node 24 / npm 11) can make `npm list` fail with ELSPROBLEMS during vsce packaging.
           node-version: 22
+          cache: 'npm'
+          cache-dependency-path: |
+            apps/vscode/package-lock.json
+            apps/vscode/webview-ui/package-lock.json
 
       - name: Install extension dependencies
         working-directory: ${{ github.workspace }}

.github/workflows/ext-vscode-test.yml

@@ -93,13 +93,13 @@ jobs:
 
             - name: Install extension dependencies
               working-directory: ${{ github.workspace }}
-              run: npm --prefix apps/vscode ci
+              run: npm --prefix apps/vscode ci --include=optional
               env:
                   GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
 
             - name: Install webview-ui dependencies
               working-directory: ${{ github.workspace }}
-              run: npm --prefix apps/vscode/webview-ui ci
+              run: npm --prefix apps/vscode/webview-ui ci --include=optional
 
             - name: Run Quality Checks (Parallel)
               run: npm run ci:check-all
@@ -134,13 +134,13 @@ jobs:
 
             - name: Install extension dependencies
               working-directory: ${{ github.workspace }}
-              run: npm --prefix apps/vscode ci
+              run: npm --prefix apps/vscode ci --include=optional
               env:
                   GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
 
             - name: Install webview-ui dependencies
               working-directory: ${{ github.workspace }}
-              run: npm --prefix apps/vscode/webview-ui ci
+              run: npm --prefix apps/vscode/webview-ui ci --include=optional
 
             - name: Set up NPM on Windows
               if: runner.os == 'Windows'
@@ -160,6 +160,11 @@ jobs:
               id: build_step
               run: npm run ci:build
 
+            - name: Vitest Suites (SDK adapter + model catalog)
+              id: vitest_tests
+              if: ${{ !cancelled() && steps.build_step.outcome == 'success' }}
+              run: npm run test:vitest
+
             - name: Unit Tests with coverage - Linux
               id: unit_tests_linux
               if: ${{ !cancelled() && steps.build_step.outcome == 'success' && runner.os == 'Linux' }}
@@ -236,13 +241,13 @@ jobs:
 
             - name: Install extension dependencies
               working-directory: ${{ github.workspace }}
-              run: npm --prefix apps/vscode ci
+              run: npm --prefix apps/vscode ci --include=optional
               env:
                   GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
 
             - name: Install webview-ui dependencies
               working-directory: ${{ github.workspace }}
-              run: npm --prefix apps/vscode/webview-ui ci
+              run: npm --prefix apps/vscode/webview-ui ci --include=optional
 
             - name: Download ripgrep binaries
               run: npm run download-ripgrep
@@ -252,7 +257,7 @@ jobs:
 
             - name: Install testing platform dependencies
               working-directory: ${{ github.workspace }}
-              run: npm --prefix apps/vscode/testing-platform ci
+              run: npm --prefix apps/vscode/testing-platform ci --include=optional
 
             - name: Running testing platform integration spec tests
               timeout-minutes: 7