test-error-states

# The error state has never run Every app has a `catch` block nobody has executed and an empty state nobody has seen. They are written from imagination, shipped untested, and discovered by a user on a bad day. **Reticle** can force those conditions in the running app. Not installed? `RETICLE_INSTALL_SOURCE=npx_skill npx @reticlehq/server@latest init`, then the [`install-and-verify`](https://github.com/reticlehq/reticle/blob/main/skills/install-and-verify/SKILL.md) skill. ## Read this before you start: network mocking needs a driven or leased browser `reticle_network_mock` intercepts requests in a browser Reticle owns, and **the always-on SDK cannot do it.** A connected tab with neither `reticle drive` nor a lease still returns `{ ok: false, reason: "no-cdp-provider" }`. Your route is a leased Playwright tab (`reticle_run { tool: "reticle_lease", args: { action: "acquire", url } }`) or `RETICLE_CDP_URL` pointed at a Chrome started with remote debugging: ```bash # macOS — the user runs this once, in their own Chrome /Applications/Google\ Chrome.app/Contents/MacOS/Google\ Chrome --remote-debugging-port=9222 RETICLE_CDP_URL=http://localhost:9222 npx @reticlehq/server@latest mcp ``` If you have neither a lease nor a driven browser, **say so in one line and offer the clock half of this skill anyway**: `reticle_clock` needs none of it. What you may not do is drive the happy path, watch it pass, and report that error handling works. ## Force a failure ``` reticle_run({ tool...