What we change on your system

Hypermile is a local proxy. When you enable wiring it edits client config so Claude Code / Codex talk through 127.0.0.1. Everything is reversible from Settings → Uninstall, or by quitting with auto-unwire.

Claude Code

• ~/.claude/settings.json (Windows: %USERPROFILE%\.claude\settings.json) — an env block setting ANTHROPIC_BASE_URL to the local proxy, fenced with Hypermile markers. A timestamped backup is written before every edit.
• Optional WSL copy of the same settings inside your distro, pointing at the Windows-host proxy via mirrored networking.

Codex

• ~/.codex/config.toml — a provider block with OPENAI_BASE_URL / base URL override. Backed up before edit; removed on unwire.

Hypermile’s own data (local only)

• Config / license / logs under your OS app-data directory (%APPDATA%\Hypermile, ~/Library/Application Support/Hypermile, or ~/.config/Hypermile).
• store.db — compressed-request analytics + reversible originals (purgable from Settings).
• usage.db — transcript-derived burn / forecast events.
• settings.json, license.json, wiring state, logs.

What we never do

• Never upload prompts, completions, or originals by default.
• Never log API keys or Authorization headers.
• Cloud sync (if you opt in) sends token/project aggregates only — never message bodies.

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