feat(coding-agent/web): added Brave web search provider with recency filtering and API integration

- Added Brave web search provider with support for query, result count, and recency filtering.
- Added BRAVE_API_KEY environment variable configuration for Brave search authentication.
- Updated web search provider priority order to include Brave as second-highest priority after Exa.
- Extended recency filter support to Brave search provider alongside Perplexity.
- Implemented BraveProvider class with API integration, response mapping, and parameter validation.
- Added helper functions for recency mapping, result clamping, and snippet building in Brave provider.

crates/pi-natives/src/grep.rs

@@ -717,7 +717,11 @@ fn sanitize_braces(pattern: &str) -> Cow<'_, str> {
 		i += ch.len_utf8();
 	}
 
-	if modified { Cow::Owned(result) } else { Cow::Borrowed(pattern) }
+	if modified {
+		Cow::Owned(result)
+	} else {
+		Cow::Borrowed(pattern)
+	}
 }
 fn build_matcher(
 	pattern: &str,

packages/ai/CHANGELOG.md

@@ -1,6 +1,9 @@
 # Changelog
 
 ## [Unreleased]
+### Added
+
+- Added support for Brave search provider with BRAVE_API_KEY environment variable
 
 ## [12.7.0] - 2026-02-16
 ### Added

packages/ai/src/stream.ts

@@ -68,6 +68,7 @@ const serviceProviderMap: Record<string, KeyResolver> = {
 	cursor: "CURSOR_ACCESS_TOKEN",
 	"azure-openai-responses": "AZURE_OPENAI_API_KEY",
 	exa: "EXA_API_KEY",
+	brave: "BRAVE_API_KEY",
 	perplexity: "PERPLEXITY_API_KEY",
 	// GitHub Copilot uses GitHub personal access token
 	"github-copilot": () => $env.COPILOT_GITHUB_TOKEN || $env.GH_TOKEN || $env.GITHUB_TOKEN,

packages/coding-agent/CHANGELOG.md

@@ -1,13 +1,18 @@
 # Changelog
 
 ## [Unreleased]
+
 ### Added
 
+- Added Brave web search provider as an alternative search option with recency filtering support
+- Added `BRAVE_API_KEY` environment variable support for Brave web search authentication
 - Added pagination support for fetching GitHub issue comments, allowing retrieval of all comments beyond the initial 50-comment limit
 - Added comment count display showing partial results when not all comments could be fetched (e.g., '5 of 10 comments')
 
 ### Changed
 
+- Updated web search provider priority order to include Brave (Exa → Brave → Jina → Perplexity → Anthropic → Gemini → Codex → Z.AI)
+- Extended recency filter support to Brave provider alongside Perplexity
 - Changed GitHub issue comment fetching to use paginated API requests with 100 comments per page instead of single request with 50-comment limit
 
 ## [12.7.5] - 2026-02-16

packages/coding-agent/docs/environment-variables.md

@@ -146,6 +146,7 @@ OAuth host chain: `KIMI_CODE_OAUTH_HOST` → `KIMI_OAUTH_HOST` → `https://auth
 | Variable | Used by |
 |---|---|
 | `EXA_API_KEY` | Exa search provider and Exa MCP tools |
+| `BRAVE_API_KEY` | Brave search provider |
 | `PERPLEXITY_API_KEY` | Perplexity search provider API-key mode |
 | `ZAI_API_KEY` | z.ai search provider (also checks stored OAuth in `agent.db`) |
 | `OPENAI_API_KEY` / Codex OAuth in DB | Codex search provider availability/auth |
@@ -303,6 +304,6 @@ Treat these as secrets; do not log or commit them:
 
 - Provider/API keys and OAuth/bearer credentials (all `*_API_KEY`, `*_TOKEN`, OAuth access/refresh tokens)
 - Cloud credentials (`AWS_*`, `GOOGLE_APPLICATION_CREDENTIALS` path may expose service-account material)
-- Search/provider auth vars (`EXA_API_KEY`, `PERPLEXITY_API_KEY`, Anthropic search keys)
+- Search/provider auth vars (`EXA_API_KEY`, `BRAVE_API_KEY`, `PERPLEXITY_API_KEY`, Anthropic search keys)
 
 Python runtime also explicitly strips many common key vars before spawning kernel subprocesses (`packages/coding-agent/src/ipy/runtime.ts`).

packages/coding-agent/src/cli/args.ts

@@ -213,6 +213,7 @@ export function getExtraHelpText(): string {
 
   ${chalk.dim("# Search & Tools")}
   EXA_API_KEY                - Exa web search
+  BRAVE_API_KEY              - Brave web search
   PERPLEXITY_API_KEY         - Perplexity web search
   ANTHROPIC_SEARCH_API_KEY   - Anthropic search provider
 

packages/coding-agent/src/cli/web-search-cli.ts

@@ -24,6 +24,7 @@ const PROVIDERS: Array<SearchProviderId | "auto"> = [
 	"anthropic",
 	"perplexity",
 	"exa",
+	"brave",
 	"jina",
 	"zai",
 	"gemini",
@@ -131,14 +132,14 @@ ${chalk.bold("Arguments:")}
 
 ${chalk.bold("Options:")}
   --provider <name>   Provider: ${PROVIDERS.join(", ")}
-  --recency <value>   Recency filter (Perplexity only): ${RECENCY_OPTIONS.join(", ")}
+  --recency <value>   Recency filter (Brave/Perplexity): ${RECENCY_OPTIONS.join(", ")}
   -l, --limit <n>     Max results to return
   --compact           Render condensed output
   -h, --help          Show this help
 
 ${chalk.bold("Examples:")}
   ${APP_NAME} q --provider=exa "what's the color of the sky"
-  ${APP_NAME} q --provider=perplexity --recency=week "latest TypeScript 5.7 changes"
+  ${APP_NAME} q --provider=brave --recency=week "latest TypeScript 5.7 changes"
 `);
 }
 

packages/coding-agent/src/commands/web-search.ts

@@ -10,6 +10,7 @@ const PROVIDERS: Array<SearchProviderId | "auto"> = [
 	"anthropic",
 	"perplexity",
 	"exa",
+	"brave",
 	"jina",
 	"zai",
 	"gemini",

packages/coding-agent/src/config/settings-schema.ts

@@ -617,7 +617,7 @@ export const SETTINGS_SCHEMA = {
 	// ─────────────────────────────────────────────────────────────────────────
 	"providers.webSearch": {
 		type: "enum",
-		values: ["auto", "exa", "jina", "zai", "perplexity", "anthropic"] as const,
+		values: ["auto", "exa", "brave", "jina", "zai", "perplexity", "anthropic"] as const,
 		default: "auto",
 		ui: { tab: "services", label: "Web search provider", description: "Provider for web search tool", submenu: true },
 	},

packages/coding-agent/src/modes/components/settings-defs.ts

@@ -149,9 +149,10 @@ const OPTION_PROVIDERS: Partial<Record<SettingPath, OptionProvider>> = {
 		{
 			value: "auto",
 			label: "Auto",
-			description: "Priority: Exa > Jina > Perplexity > Anthropic > Gemini > Codex > Z.AI",
+			description: "Priority: Exa > Brave > Jina > Perplexity > Anthropic > Gemini > Codex > Z.AI",
 		},
 		{ value: "exa", label: "Exa", description: "Requires EXA_API_KEY" },
+		{ value: "brave", label: "Brave", description: "Requires BRAVE_API_KEY" },
 		{ value: "jina", label: "Jina", description: "Requires JINA_API_KEY" },
 		{ value: "perplexity", label: "Perplexity", description: "Requires PERPLEXITY_API_KEY" },
 		{ value: "anthropic", label: "Anthropic", description: "Uses Anthropic web search" },

packages/coding-agent/src/web/search/index.ts

@@ -1,7 +1,7 @@
 /**
  * Unified Web Search Tool
  *
- * Single tool supporting Anthropic, Perplexity, Exa, Jina, Gemini, Codex, and Z.AI
+ * Single tool supporting Anthropic, Perplexity, Exa, Brave, Jina, Gemini, Codex, and Z.AI
  * providers with provider-specific parameters exposed conditionally.
  *
  * When EXA_API_KEY is available, additional specialized tools are exposed:
@@ -33,13 +33,13 @@ import { SearchProviderError } from "./types";
 export const webSearchSchema = Type.Object({
 	query: Type.String({ description: "Search query" }),
 	provider: Type.Optional(
-		StringEnum(["auto", "exa", "jina", "zai", "anthropic", "perplexity", "gemini", "codex"], {
+		StringEnum(["auto", "exa", "brave", "jina", "zai", "anthropic", "perplexity", "gemini", "codex"], {
 			description: "Search provider (default: auto)",
 		}),
 	),
 	recency: Type.Optional(
 		StringEnum(["day", "week", "month", "year"], {
-			description: "Recency filter (Perplexity)",
+			description: "Recency filter (Brave, Perplexity)",
 		}),
 	),
 	limit: Type.Optional(Type.Number({ description: "Max results to return" })),
@@ -47,7 +47,7 @@ export const webSearchSchema = Type.Object({
 
 export type SearchParams = {
 	query: string;
-	provider?: "auto" | "exa" | "jina" | "zai" | "anthropic" | "perplexity" | "gemini" | "codex";
+	provider?: "auto" | "exa" | "brave" | "jina" | "zai" | "anthropic" | "perplexity" | "gemini" | "codex";
 	recency?: "day" | "week" | "month" | "year";
 	limit?: number;
 	/** Maximum output tokens. Defaults to 4096. */
@@ -236,7 +236,7 @@ export async function runSearchQuery(
 /**
  * Web search tool implementation.
  *
- * Supports Anthropic, Perplexity, Exa, Jina, Gemini, Codex, and Z.AI providers with automatic fallback.
+ * Supports Anthropic, Perplexity, Exa, Brave, Jina, Gemini, Codex, and Z.AI providers with automatic fallback.
  * Session is accepted for interface consistency but not used.
  */
 export class SearchTool implements AgentTool<typeof webSearchSchema, SearchRenderDetails> {

packages/coding-agent/src/web/search/provider.ts

@@ -1,5 +1,6 @@
 import { AnthropicProvider } from "./providers/anthropic";
 import type { SearchProvider } from "./providers/base";
+import { BraveProvider } from "./providers/brave";
 import { CodexProvider } from "./providers/codex";
 import { ExaProvider } from "./providers/exa";
 import { GeminiProvider } from "./providers/gemini";
@@ -13,6 +14,7 @@ export { SearchProvider } from "./providers/base";
 
 const SEARCH_PROVIDERS: Record<SearchProviderId, SearchProvider> = {
 	exa: new ExaProvider(),
+	brave: new BraveProvider(),
 	jina: new JinaProvider(),
 	perplexity: new PerplexityProvider(),
 	zai: new ZaiProvider(),
@@ -21,7 +23,16 @@ const SEARCH_PROVIDERS: Record<SearchProviderId, SearchProvider> = {
 	codex: new CodexProvider(),
 } as const;
 
-const SEARCH_PROVIDER_ORDER: SearchProviderId[] = ["exa", "jina", "perplexity", "anthropic", "gemini", "codex", "zai"];
+const SEARCH_PROVIDER_ORDER: SearchProviderId[] = [
+	"exa",
+	"brave",
+	"jina",
+	"perplexity",
+	"anthropic",
+	"gemini",
+	"codex",
+	"zai",
+];
 
 export function getSearchProvider(provider: SearchProviderId): SearchProvider {
 	return SEARCH_PROVIDERS[provider];
@@ -35,7 +46,7 @@ export function setPreferredSearchProvider(provider: SearchProviderId | "auto"):
 	preferredProvId = provider;
 }
 
-/** Determine which providers are configured (priority order) */
+/** Determine which providers are configured (priority: Exa → Brave → Jina → Perplexity → Anthropic → Gemini → Codex → Z.AI) */
 export async function resolveProviderChain(
 	preferredProvider: SearchProviderId | "auto" = preferredProvId,
 ): Promise<SearchProvider[]> {

packages/coding-agent/src/web/search/providers/brave.ts

@@ -0,0 +1,165 @@
+/**
+ * Brave Web Search Provider
+ *
+ * Calls Brave's web search REST API and maps results into the unified
+ * SearchResponse shape used by the web search tool.
+ */
+import { getEnvApiKey } from "@oh-my-pi/pi-ai";
+import type { SearchResponse, SearchSource } from "../../../web/search/types";
+import { SearchProviderError } from "../../../web/search/types";
+import type { SearchParams } from "./base";
+import { SearchProvider } from "./base";
+
+const BRAVE_SEARCH_URL = "https://api.search.brave.com/res/v1/web/search";
+const DEFAULT_NUM_RESULTS = 10;
+const MAX_NUM_RESULTS = 20;
+
+const RECENCY_MAP: Record<"day" | "week" | "month" | "year", "pd" | "pw" | "pm" | "py"> = {
+	day: "pd",
+	week: "pw",
+	month: "pm",
+	year: "py",
+};
+
+export interface BraveSearchParams {
+	query: string;
+	num_results?: number;
+	recency?: "day" | "week" | "month" | "year";
+	signal?: AbortSignal;
+}
+
+interface BraveSearchResult {
+	title?: string | null;
+	url?: string | null;
+	description?: string | null;
+	age?: string | null;
+	extra_snippets?: string[] | null;
+}
+
+interface BraveSearchResponse {
+	web?: {
+		results?: BraveSearchResult[];
+	};
+}
+
+/** Find BRAVE_API_KEY from environment or .env files. */
+export function findApiKey(): string | null {
+	return getEnvApiKey("brave") ?? null;
+}
+
+function clampNumResults(value: number | undefined): number {
+	if (!value || Number.isNaN(value)) return DEFAULT_NUM_RESULTS;
+	return Math.min(MAX_NUM_RESULTS, Math.max(1, value));
+}
+
+function dateToAgeSeconds(dateStr: string | null | undefined): number | undefined {
+	if (!dateStr) return undefined;
+	try {
+		const date = new Date(dateStr);
+		if (Number.isNaN(date.getTime())) return undefined;
+		return Math.floor((Date.now() - date.getTime()) / 1000);
+	} catch {
+		return undefined;
+	}
+}
+
+function buildSnippet(result: BraveSearchResult): string | undefined {
+	const snippets: string[] = [];
+
+	if (result.description?.trim()) {
+		snippets.push(result.description.trim());
+	}
+
+	if (Array.isArray(result.extra_snippets)) {
+		for (const snippet of result.extra_snippets) {
+			if (!snippet?.trim()) continue;
+			if (snippets.includes(snippet.trim())) continue;
+			snippets.push(snippet.trim());
+		}
+	}
+
+	return snippets.length > 0 ? snippets.join("\n") : undefined;
+}
+
+async function callBraveSearch(
+	apiKey: string,
+	params: BraveSearchParams,
+): Promise<{ response: BraveSearchResponse; requestId?: string }> {
+	const numResults = clampNumResults(params.num_results);
+	const url = new URL(BRAVE_SEARCH_URL);
+	url.searchParams.set("q", params.query);
+	url.searchParams.set("count", String(numResults));
+	url.searchParams.set("extra_snippets", "true");
+	if (params.recency) {
+		url.searchParams.set("freshness", RECENCY_MAP[params.recency]);
+	}
+
+	const response = await fetch(url, {
+		headers: {
+			Accept: "application/json",
+			"X-Subscription-Token": apiKey,
+		},
+		signal: params.signal,
+	});
+
+	if (!response.ok) {
+		const errorText = await response.text();
+		throw new SearchProviderError("brave", `Brave API error (${response.status}): ${errorText}`, response.status);
+	}
+
+	const data = (await response.json()) as BraveSearchResponse;
+	const requestId = response.headers.get("x-request-id") ?? response.headers.get("request-id") ?? undefined;
+	return { response: data, requestId };
+}
+
+/** Execute Brave web search. */
+export async function searchBrave(params: BraveSearchParams): Promise<SearchResponse> {
+	const numResults = clampNumResults(params.num_results);
+	const apiKey = findApiKey();
+	if (!apiKey) {
+		throw new Error("BRAVE_API_KEY not found. Set it in environment or .env file.");
+	}
+
+	const { response, requestId } = await callBraveSearch(apiKey, params);
+	const sources: SearchSource[] = [];
+
+	for (const result of response.web?.results ?? []) {
+		if (!result.url) continue;
+		sources.push({
+			title: result.title ?? result.url,
+			url: result.url,
+			snippet: buildSnippet(result),
+			publishedDate: result.age ?? undefined,
+			ageSeconds: dateToAgeSeconds(result.age),
+		});
+	}
+
+	return {
+		provider: "brave",
+		sources: sources.slice(0, numResults),
+		requestId,
+	};
+}
+
+/** Search provider for Brave web search. */
+export class BraveProvider extends SearchProvider {
+	readonly id = "brave";
+	readonly label = "Brave";
+
+	isAvailable() {
+		try {
+			return !!findApiKey();
+		} catch {
+			return false;
+		}
+	}
+
+	search(params: SearchParams): Promise<SearchResponse> {
+		return searchBrave({
+			query: params.query,
+			num_results: params.numSearchResults ?? params.limit,
+			recency: params.recency,
+			signal: params.signal,
+		});
+	}
+}

packages/coding-agent/src/web/search/types.ts

@@ -5,7 +5,7 @@
  */
 
 /** Supported web search providers */
-export type SearchProviderId = "exa" | "jina" | "zai" | "anthropic" | "perplexity" | "gemini" | "codex";
+export type SearchProviderId = "exa" | "brave" | "jina" | "zai" | "anthropic" | "perplexity" | "gemini" | "codex";
 
 /** Source returned by search (all providers) */
 export interface SearchSource {