Vendor OpenClaw source as Adolf fork baseline

Adolf is a fork/vendored clone of github.com/openclaw/openclaw (v2026.6.11),
free to diverge. Tree copied sans upstream .git; upstream remote added for
future syncs. Node pinned to 24 (.nvmrc); engines already require >=22.19.
Preserves docs/ARCHITECTURE.md.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01LeqyaxJF2nbRXJtae2kNB2

docs/tools/brave-search.md

@@ -0,0 +1,138 @@
+---
+summary: "Brave Search API setup for web_search"
+read_when:
+  - You want to use Brave Search for web_search
+  - You need a BRAVE_API_KEY or plan details
+title: "Brave search"
+---
+
+OpenClaw supports Brave Search API as a `web_search` provider.
+
+## Get an API key
+
+1. Create a Brave Search API account at [https://brave.com/search/api/](https://brave.com/search/api/)
+2. In the dashboard, choose the **Search** plan and generate an API key.
+3. Store the key in config or set `BRAVE_API_KEY` in the Gateway environment.
+
+## Config example
+
+```json5
+{
+  plugins: {
+    entries: {
+      brave: {
+        config: {
+          webSearch: {
+            apiKey: "BRAVE_API_KEY_HERE",
+            mode: "web", // or "llm-context"
+            baseUrl: "https://api.search.brave.com", // optional proxy/base URL override
+          },
+        },
+      },
+    },
+  },
+  tools: {
+    web: {
+      search: {
+        provider: "brave",
+        maxResults: 5,
+        timeoutSeconds: 30,
+      },
+    },
+  },
+}
+```
+
+Provider-specific Brave search settings live under `plugins.entries.brave.config.webSearch.*`; this is the canonical config path. A shared top-level `tools.web.search.apiKey` and a scoped `tools.web.search.brave.*` still load through a compatibility merge, but new config should use the plugin-scoped path above.
+
+`webSearch.mode` controls the Brave transport:
+
+- `web` (default): normal Brave web search with titles, URLs, and snippets
+- `llm-context`: Brave LLM Context API with pre-extracted text chunks and sources for grounding
+
+`webSearch.baseUrl` can point Brave requests at a trusted Brave-compatible proxy
+or gateway. OpenClaw appends `/res/v1/web/search` or `/res/v1/llm/context` to
+the configured base URL and keeps the base URL in the cache key. Public
+endpoints must use `https://`; `http://` is accepted only for trusted loopback
+or private-network proxy hosts.
+
+## Tool parameters
+
+<ParamField path="query" type="string" required>
+Search query.
+</ParamField>
+
+<ParamField path="count" type="number" default="5">
+Number of results to return (1–10).
+</ParamField>
+
+<ParamField path="country" type="string">
+2-letter ISO country code (e.g. `US`, `DE`).
+</ParamField>
+
+<ParamField path="language" type="string">
+ISO 639-1 language code for search results (e.g. `en`, `de`, `fr`).
+</ParamField>
+
+<ParamField path="search_lang" type="string">
+Brave search-language code (e.g. `en`, `en-gb`, `zh-hans`).
+</ParamField>
+
+<ParamField path="ui_lang" type="string">
+ISO language code for UI elements.
+</ParamField>
+
+<ParamField path="freshness" type="'day' | 'week' | 'month' | 'year'">
+Time filter — `day` is 24 hours.
+</ParamField>
+
+<ParamField path="date_after" type="string">
+Only results published after this date (`YYYY-MM-DD`).
+</ParamField>
+
+<ParamField path="date_before" type="string">
+Only results published before this date (`YYYY-MM-DD`).
+</ParamField>
+
+**Examples:**
+
+```javascript
+// Country and language-specific search
+await web_search({
+  query: "renewable energy",
+  country: "DE",
+  language: "de",
+});
+
+// Recent results (past week)
+await web_search({
+  query: "AI news",
+  freshness: "week",
+});
+
+// Date range search
+await web_search({
+  query: "AI developments",
+  date_after: "2024-01-01",
+  date_before: "2024-06-30",
+});
+```
+
+## Notes
+
+- OpenClaw uses the Brave **Search** plan. If you have a legacy subscription (e.g. the original Free plan with 2,000 queries/month), it remains valid but does not include newer features like LLM Context or higher rate limits.
+- Each Brave plan includes **\$5/month in free credit** (renewing). The Search plan costs \$5 per 1,000 requests, so the credit covers 1,000 queries/month. Set your usage limit in the Brave dashboard to avoid unexpected charges. See the [Brave API portal](https://brave.com/search/api/) for current plans.
+- The Search plan includes the LLM Context endpoint and AI inference rights. Storing results to train or tune models requires a plan with explicit storage rights. See the Brave [Terms of Service](https://api-dashboard.search.brave.com/terms-of-service).
+- `llm-context` mode returns grounded source entries instead of the normal web-search snippet shape.
+- `llm-context` mode supports `freshness` and bounded `date_after` + `date_before` ranges. It does not support `ui_lang`; `date_before` without `date_after` is rejected because Brave requires custom freshness ranges to include both start and end dates.
+- `ui_lang` must include a region subtag like `en-US`.
+- Results are cached for 15 minutes by default (configurable via `cacheTtlMinutes`).
+- Custom `webSearch.baseUrl` values are included in Brave cache identity, so
+  proxy-specific responses do not collide.
+- Enable the `brave.http` diagnostics flag to log Brave request URLs/query params, response status/timing, and search-cache hit/miss/write events while troubleshooting. The flag never logs the API key or response bodies, but search queries can be sensitive.
+
+## Related
+
+- [Web Search overview](/tools/web) -- all providers and auto-detection
+- [Perplexity Search](/tools/perplexity-search) -- structured results with domain filtering
+- [Exa Search](/tools/exa-search) -- neural search with content extraction