chore: add config.example.json and gitignore config.json

.gitignore

@@ -1,5 +1,21 @@
 target/
 .DS_Store
 .env
+config.json
 proxies.txt
 .claude/skills/
+.omc
+.lavra
+.beads
+.cache
+docs/plans
+docs/superpowers
+docs/reports
+docs/sessions
+benchmarks
+docs
+
+# Beads / Dolt files (added by bd init)
+.dolt/
+*.db
+.beads-credential-key

config.example.json

@@ -0,0 +1,34 @@
+{
+  "_doc": [
+    "Copy to config.json and remove fields you don't need.",
+    "Secrets (api_key, proxy, webhook, llm_base_url) go in .env — NOT here.",
+    "BOOL FLAG LIMITATION: once set to true here, cannot be overridden to false",
+    "from the CLI for a single run (no --no-flag support). Use NOXA_CONFIG=/dev/null",
+    "on the command line to bypass this config entirely.",
+    "on_change is intentionally absent — it must remain a CLI-only flag.",
+    "Unknown fields are silently ignored, so this file works across noxa versions."
+  ],
+
+  "format": "markdown",
+  "browser": "chrome",
+  "timeout": 30,
+  "pdf_mode": "auto",
+  "metadata": false,
+  "verbose": false,
+  "only_main_content": false,
+
+  "include_selectors": [],
+  "exclude_selectors": ["nav", "footer", ".sidebar", ".cookie-banner"],
+
+  "depth": 1,
+  "max_pages": 20,
+  "concurrency": 5,
+  "delay": 100,
+  "path_prefix": null,
+  "include_paths": [],
+  "exclude_paths": ["/changelog/*", "/blog/*", "/releases/*"],
+  "use_sitemap": false,
+
+  "llm_provider": "gemini",
+  "llm_model": "gemini-2.5-pro"
+}