chore: import upstream snapshot with attribution

docs/command-code.md

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+---
+summary: "Command Code provider notes: cookie authentication and monthly credit parsing."
+read_when:
+  - Debugging Command Code cookie import or usage parsing
+  - Updating Command Code billing or credit display
+  - Adjusting Command Code provider UI/menu behavior
+---
+
+# Command Code
+
+CodexBar surfaces [Command Code](https://commandcode.ai) monthly USD credits next
+to your other AI coding providers.
+
+## Data source
+
+- `https://api.commandcode.ai` billing endpoints, authenticated with the
+  signed-in Command Code web session.
+- The provider reads monthly credit usage, plan allowance, remaining credits,
+  and billing-cycle reset timing when the account data is available.
+
+## Authentication
+
+Command Code support uses browser cookies or a manually pasted cookie header.
+
+1. Sign in to `https://commandcode.ai` in a supported browser.
+2. Open Settings -> Providers -> Command Code.
+3. Enable Command Code and leave Cookie source on Automatic, or switch to Manual
+   and paste a `Cookie:` header/cURL capture from Command Code.
+
+Automatic import looks for better-auth session cookies from `commandcode.ai`
+and `www.commandcode.ai`. If automatic import cannot find a session, use the
+manual cookie field.
+
+On Linux, browser import is unavailable. Set `cookieSource` to `manual` and
+provide the Command Code `Cookie` header in `cookieHeader`; both `auto` and
+`web` CLI source modes then use the billing API.
+
+## Display
+
+- The menu bar item and provider card use the Command Code icon and label.
+- The primary row shows monthly credits used/remaining.
+- Widgets do not expose Command Code in the provider picker yet.
+
+## Related files
+
+- `Sources/CodexBarCore/Providers/CommandCode/` - descriptor, cookie import,
+  billing fetcher, snapshot mapping, and plan catalog.
+- `Sources/CodexBar/Providers/CommandCode/` - settings store bridge and
+  provider settings UI.
+- `Tests/CodexBarTests/CommandCode*Tests.swift` - parser, cookie, settings,
+  and icon coverage.