diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 88508f8..80ce054 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -52,12 +52,38 @@ jobs:
         shell: bash
         run: just check
 
+  check-windows:
+    name: check (windows-latest)
+    runs-on: windows-latest
+    steps:
+      - uses: actions/checkout@v6
+      - uses: actions/setup-go@v6
+        with:
+          go-version-file: go.mod
+          cache: true
+      - uses: taiki-e/install-action@just
+      - name: Normalize checkout line endings
+        shell: bash
+        run: |
+          git config --global core.autocrlf false
+          git reset --hard HEAD
+      - name: Install repo tooling
+        shell: bash
+        run: |
+          go install mvdan.cc/gofumpt@v0.9.2
+          go install github.com/golangci/golangci-lint/cmd/golangci-lint@v1.64.8
+          echo "$(go env GOPATH)/bin" >> "$GITHUB_PATH"
+      - name: Run Windows compatibility gate
+        shell: bash
+        run: just check
+
   full-gate:
     name: full gate (ubuntu-latest)
     runs-on: ubuntu-latest
     needs:
       - check
       - check-macos
+      - check-windows
     steps:
       - uses: actions/checkout@v6
       - uses: actions/setup-go@v6
diff --git a/README.md b/README.md
index 2bc4af6..1f20979 100644
--- a/README.md
+++ b/README.md
@@ -98,6 +98,23 @@ Recommended defaults:
 
 For subagent workflows, the recommended pattern is to issue a short-lived delegated session, let the subagent use it for one bounded task, and have the embedding app call `RevokeSession` when the subagent reports completion. Session expiry remains the fallback if explicit revoke never happens.
 
+## Confidence Levels
+
+`autent` uses three different confidence levels when talking about platform support:
+
+- build confidence: GoReleaser cross-builds the example CLI release artifacts for macOS, Linux, and Windows
+- CI confidence: `just check` runs in GitHub Actions on macOS, Linux, and Windows runners, while the heavier `just ci` gate remains Ubuntu-only
+- human runtime confidence: the documented example CLI flow has been exercised by hand on macOS
+
+That means the project currently has:
+
+- cross-built example CLI artifacts for the major desktop and server targets
+- automated `just check` coverage on GitHub-hosted macOS, Linux, and Windows runners
+- human-verified runtime behavior for the documented CLI flow on macOS
+
+Be precise when describing support.
+Do not claim native human verification on Windows or Linux unless that workflow has actually been exercised there.
+
 ## Versioning And Releases
 
 `autent` is pre-`v1`.