feat: Go SearXNG client; throttled is not absence

AGENTS.md

@@ -42,7 +42,8 @@ bin/mail/     sync.go import.go (index_mail → brain/index.go)
 bin/markdown/ import.go (mistune leafs)
 bin/postgres/ query.go (read-only YAML)
 bin/git/      import.go (go-git history; Python shim execs it)
-internal/     shared Go (brain/rank is cgo-free; chats parsers; gitlog)
+bin/web/      search.go (SearXNG; Python shim execs it)
+internal/     shared Go (brain/rank is cgo-free; chats parsers; gitlog; websearch)
 bin/watch/    corpus watcher (used by bin/brain/watch.go)
 bin/tools/    vendored python libs behind bin/* (kblib, yamlout, websearch)
 bin/docker-entrypoint  container entrypoint (brain index|search|serve|watch)
@@ -83,6 +84,7 @@ bin/brain/search.go "query" [--root facts|info]   # deduction search → YAML
 bin/brain/get.go <id> [--body]
 bin/markdown/import.go [dir]                      # mistune leaves → YAML
 bin/git/import.go [REPO] [--json] [--limit N]     # go-git history → commit leafs
+bin/web/search.go "query" [--json]                # SearXNG; throttled ≠ absence
 bin/postgres/query.go --profile onlyoffice -c 'SELECT 1'
 bin/md/tables                                     # what the graph holds → YAML
 bin/brain/deduce "question"                       # thinking wrapper

PLAN.md

@@ -26,7 +26,7 @@ detective method: **a fact needs ≥2 independent sources or it is
 |---|----------|--------|
 | D1 | RAG corpus | ops stack (chat, onlyoffice, gitea/NPM, searchxng, observability, ai-bot, mcp-servers, `~/.ssh/config`) + portfolio. Exclude `office.dev` + jobs/applications. |
 | D2 | skill merging | integrate skills **in this project** `skills/`; skip gitea / brain-dependent skills. |
-| D3 | web search | Vendored client; SearXNG URL is config. Optional Compose instance (sanitized settings). Do not run a second copy on a host that already has one. Empty/`throttled` ≠ “nothing exists”. |
+| D3 | web search | Go client `bin/web/search.go` (`internal/websearch`). SearXNG URL is config (`BRAIN_SEARCH_URL`). Optional Compose profile `searxng` (sanitized settings). Do not run a second copy on a host that already has one. Empty/`throttled` ≠ “nothing exists”. |
 | D4 | embeddings | **model2vec** `minishlab/potion-multilingual-128M` instead of embeddinggemma. |
 | D5 | parser | **mistune** for MD → leaf extraction (duckdb-md documented as future optional SQL/export layer, not v1). |
 | D6 | graph engine | **LadybugDB**. Go is the service (`bin/brain/search.go`, `bin/brain/serve.go` in-process, `internal/brain`); Python remains for index/write until the Go write path is safe. |
@@ -63,11 +63,12 @@ detective method: **a fact needs ≥2 independent sources or it is
     markdown/import.go      mistune leaves
     postgres/query.go       read-only YAML (wraps bin/db/psql-yq)
     git/import.go           go-git history (no git binary; conversion only)
+    web/search.go           SearXNG client (throttled ≠ absence)
     chats/sync.go import.go facts.go apply.go
                             (libs in internal/chats; no chats index)
     md/import               (deprecated; bin/markdown/import.go)
     brain/extract  brain/audit   brain/deduce    (thinking wrapper)
-    web/search               (vendored)
+    web/search               (deprecated shim → web/search.go)
     db/psql-yq               (vendored)
     ssh-tunnel               onlyoffice pg tunnel 5433
   var/kb.lbug               single embedded store (gitignored)

README.md

@@ -104,6 +104,14 @@ bin/git/import.go --root "$PROJECTS_ROOT" --json  # one pass per .git under root
 
 Conversion only. Graph write (`File-[:HAS_VERSION]->Commit-[:AUTHORED]->Person`) stays with `bin/brain/index.go`.
 
+Web search (second independent source) goes through SearXNG. Empty results mean **throttled**, not “nothing exists”:
+
+```bash
+bin/web/search.go "LadybugDB vector index" --json
+# Optional local instance (skip if BRAIN_SEARCH_URL already points at one):
+# SEARXNG_SECRET=$(openssl rand -hex 32) docker compose --profile searxng up -d
+```
+
 Mail is a first-class corpus (retrievable through the same search):
 
 ```bash

bin/tools/test_bin_layout.py

@@ -102,6 +102,11 @@ class BinLayoutTest(unittest.TestCase):
         )
         self.assertIn("bin/git/import.go", py)
 
+    def test_web_search_is_shebang(self) -> None:
+        self._assert_shebang("bin/web/search.go")
+        py = (ROOT / "bin" / "web" / "search").read_text()
+        self.assertIn("bin/web/search.go", py)
+
     def test_gitimport_py_has_no_git_binary(self) -> None:
         py = (ROOT / "bin" / "tools" / "gitimport.py").read_text()
         self.assertNotIn("subprocess", py)

bin/tools/test_published_docs.py

@@ -45,6 +45,20 @@ class PublishedDocsTest(unittest.TestCase):
         self.assertIn("go-git", text)
         self.assertIn("D19", (ROOT / "PLAN.md").read_text())
 
+    def test_web_search_is_go_not_ops_host(self) -> None:
+        readme = (ROOT / "README.md").read_text()
+        self.assertIn("bin/web/search.go", readme)
+        skill = (ROOT / "skills" / "web-search" / "SKILL.md").read_text()
+        self.assertIn("bin/web/search.go", skill)
+        self.assertNotIn("search.ops.io", skill)
+        self.assertNotIn("search.ops.io", readme)
+        compose = (ROOT / "compose.yaml").read_text()
+        self.assertIn("searxng", compose)
+        self.assertNotIn("search.ops.io", compose)
+        settings = (ROOT / "deploy" / "searxng" / "settings.yml").read_text()
+        self.assertNotIn("password", settings.lower())
+        self.assertIn("json", settings)
+
     def test_docs_do_not_claim_hop_walks(self) -> None:
         paths = [
             ROOT / "README.md",

bin/web/search

@@ -1,150 +1,26 @@
 #!/usr/bin/env python3
-"""web/search - web search through the self-hosted SearXNG at search.ops.io.
+"""web/search — deprecated. Use bin/web/search.go (SearXNG, no Python client).
 
-  bin/web/search "LadybugDB vector search"
-  bin/web/search "model2vec multilingual" --site github.com
-  bin/web/search "uclancy" --category it -n 3 --json | jq -r '.results[].url'
-  bin/web/search "sqlite-vec" --refresh          # ignore the cached answer
-
-This complements bin/kb/search: the knowledge base holds our own facts, this
-reaches the public web. Use it as the second, independent source that the
-detective method asks for.
-
-Exit codes: 0 results, 2 refused as possible PII, 3 throttled (not "nothing
-found" - the instance answers 200 with an empty list when it throttles).
+  bin/web/search.go QUERY [--json] [-n N] [--site HOST]
 """
 from __future__ import annotations
 
-import argparse
-import fcntl
-import json
 import os
 import sys
-import time
-import urllib.parse
-import urllib.request
 from pathlib import Path
 
-TOOLS = Path(__file__).resolve().parents[1] / "tools"
-sys.path.insert(0, str(TOOLS))
-sys.path.insert(0, str(TOOLS / "web-search"))
-
-import websearch as ws          # noqa: E402
-from yamlout import to_yaml     # noqa: E402
-
-CONFIG = Path(os.environ.get("BRAIN_SEARCH_ENV", Path.home() / ".config/brain/search.env"))
-CACHE = Path(os.environ.get("BRAIN_SEARCH_CACHE", Path.home() / ".cache/brain/web-search.sqlite"))
-LOCK = CACHE.with_suffix(".lock")
+ROOT = Path(__file__).resolve().parents[2]
 
 
-def load_config() -> dict:
-    if not CONFIG.exists():
-        sys.exit(f"no credentials at {CONFIG} (mode 600, BRAIN_SEARCH_URL/USER/PASS)")
-    conf = {}
-    for line in CONFIG.read_text().splitlines():
-        line = line.strip()
-        if not line or line.startswith("#") or "=" not in line:
-            continue
-        key, _, value = line.partition("=")
-        conf[key.strip()] = value.strip().strip("\"'")
-    missing = {"BRAIN_SEARCH_URL", "BRAIN_SEARCH_USER", "BRAIN_SEARCH_PASS"} - conf.keys()
-    if missing:
-        sys.exit(f"{CONFIG} is missing {', '.join(sorted(missing))}")
-    return conf
-
-
-def fetch(conf: dict, query: str, params: dict, timeout: int) -> dict:
-    args = {"q": query, "format": "json", **params}
-    url = f"{conf['BRAIN_SEARCH_URL'].rstrip('/')}/search?{urllib.parse.urlencode(args)}"
-    request = urllib.request.Request(url)
-    token = f"{conf['BRAIN_SEARCH_USER']}:{conf['BRAIN_SEARCH_PASS']}".encode()
-    import base64
-    request.add_header("Authorization", "Basic " + base64.b64encode(token).decode())
-    with urllib.request.urlopen(request, timeout=timeout) as response:
-        return json.loads(response.read().decode())
-
-
-def main() -> int:
-    parser = argparse.ArgumentParser(description="web search via SearXNG")
-    parser.add_argument("query")
-    parser.add_argument("-n", "--limit", type=int, default=ws.DEFAULT_LIMIT)
-    parser.add_argument("--site", help="restrict to one domain")
-    parser.add_argument("--lang", help="language code, e.g. de")
-    parser.add_argument("--fresh", choices=["day", "week", "month", "year"],
-                        help="time range")
-    parser.add_argument("--category", help="SearXNG category, e.g. it, science, news")
-    parser.add_argument("--engines", help="comma separated engine list")
-    parser.add_argument("--json", action="store_true")
-    parser.add_argument("--refresh", action="store_true", help="bypass the cache")
-    parser.add_argument("--ttl", type=float, default=ws.CACHE_TTL)
-    parser.add_argument("--timeout", type=int, default=25)
-    parser.add_argument("--force", action="store_true",
-                        help="send even if the query looks like PII")
-    args = parser.parse_args()
-
-    query = f"site:{args.site} {args.query}" if args.site else args.query
-
-    reason = ws.phi_reason(query)
-    if reason and not args.force:
-        print(f"refused: {reason}. This query would leave the host.", file=sys.stderr)
-        print("Rephrase without identifiers, or pass --force if it is genuinely public.",
-              file=sys.stderr)
-        return 2
-
-    params = {}
-    if args.lang:
-        params["language"] = args.lang
-    if args.fresh:
-        params["time_range"] = args.fresh
-    if args.category:
-        params["categories"] = args.category
-    if args.engines:
-        params["engines"] = args.engines
-
-    key = ws.cache_key(query, params)
-    conn = ws.open_cache(CACHE)
-
-    if not args.refresh:
-        cached = ws.cache_get(conn, key, ttl=args.ttl)
-        if cached is not None:
-            out = ws.project(cached, limit=args.limit)
-            out["cached"] = True
-            sys.stdout.write(json.dumps(out, indent=2, ensure_ascii=False) + "\n"
-                             if args.json else to_yaml(out))
-            return 0
-
-    conf = load_config()
-    LOCK.parent.mkdir(parents=True, exist_ok=True)
-
-    # One request at a time across every agent on this host: the instance
-    # suspends engines for minutes when several of us ask at once.
-    with open(LOCK, "w") as lock:
-        fcntl.flock(lock, fcntl.LOCK_EX)
-
-        payload = None
-        for attempt in range(1 + len(ws.RETRY_BACKOFF)):
-            delay = ws.wait_for(ws.last_call(conn), time.time())
-            if delay:
-                time.sleep(delay)
-            ws.mark_call(conn)
-            try:
-                payload = fetch(conf, query, params, args.timeout)
-            except Exception as error:              # noqa: BLE001 - report, do not crash
-                print(f"request failed: {error}", file=sys.stderr)
-                return 3
-            if ws.classify(payload) == "ok":
-                break
-            if attempt < len(ws.RETRY_BACKOFF):
-                time.sleep(ws.RETRY_BACKOFF[attempt])
-
-    if ws.classify(payload) == "ok":
-        ws.cache_put(conn, key, payload)
-
-    out = ws.project(payload, limit=args.limit)
-    sys.stdout.write(json.dumps(out, indent=2, ensure_ascii=False) + "\n"
-                     if args.json else to_yaml(out))
-    return 0 if out["status"] == "ok" else 3
+def main(argv: list[str]) -> int:
+    print(
+        "bin/web/search is deprecated; use bin/web/search.go",
+        file=sys.stderr,
+    )
+    target = ROOT / "bin" / "web" / "search.go"
+    os.execvp("go", ["go", "run", str(target), *argv])
+    return 1
 
 
 if __name__ == "__main__":
-    sys.exit(main())
+    sys.exit(main(sys.argv[1:]))

bin/web/search.go

@@ -0,0 +1,232 @@
+//usr/bin/env go run "$0" "$@"; exit
+//
+// bin/web/search.go - SearXNG as the second independent source (D3).
+//
+//	./bin/web/search.go "LadybugDB vector search"
+//	./bin/web/search.go "model2vec" --category it --json
+//	./bin/web/search.go "postgres" --site github.com --fresh year
+//
+// Empty results mean throttled, not "nothing exists". Exit 2 = PII refuse, 3 = throttled.
+// Config: $BRAIN_SEARCH_ENV (default $HOME/.config/brain/search.env).
+// NOTE: never run `gofmt -w` on this file — it breaks the shebang.
+package main
+
+import (
+	"encoding/json"
+	"fmt"
+	"net/http"
+	"os"
+	"strconv"
+	"time"
+
+	"github.com/eSlider/2dph/internal/websearch"
+	"golang.org/x/sys/unix"
+)
+
+func main() {
+	os.Exit(run(os.Args[1:]))
+}
+
+func run(args []string) int {
+	var (
+		query, site, lang, fresh, category, engines string
+		limit                                       = websearch.DefaultLimit
+		jsonOut, refresh, force                     bool
+		ttl                                         = float64(websearch.CacheTTL)
+		timeout                                     = 25
+	)
+	i := 0
+	for i < len(args) {
+		a := args[i]
+		switch {
+		case a == "--json":
+			jsonOut = true
+		case a == "--refresh":
+			refresh = true
+		case a == "--force":
+			force = true
+		case (a == "-n" || a == "--limit") && i+1 < len(args):
+			i++
+			n, err := strconv.Atoi(args[i])
+			if err != nil || n < 0 {
+				fmt.Fprintln(os.Stderr, "web/search: --limit must be a non-negative integer")
+				return 2
+			}
+			limit = n
+		case a == "--site" && i+1 < len(args):
+			i++
+			site = args[i]
+		case a == "--lang" && i+1 < len(args):
+			i++
+			lang = args[i]
+		case a == "--fresh" && i+1 < len(args):
+			i++
+			fresh = args[i]
+		case a == "--category" && i+1 < len(args):
+			i++
+			category = args[i]
+		case a == "--engines" && i+1 < len(args):
+			i++
+			engines = args[i]
+		case a == "--ttl" && i+1 < len(args):
+			i++
+			v, err := strconv.ParseFloat(args[i], 64)
+			if err != nil {
+				fmt.Fprintln(os.Stderr, "web/search: --ttl must be a number")
+				return 2
+			}
+			ttl = v
+		case a == "--timeout" && i+1 < len(args):
+			i++
+			n, err := strconv.Atoi(args[i])
+			if err != nil || n <= 0 {
+				fmt.Fprintln(os.Stderr, "web/search: --timeout must be a positive integer")
+				return 2
+			}
+			timeout = n
+		case a == "-h" || a == "--help":
+			fmt.Fprintln(os.Stderr, `usage: bin/web/search.go QUERY [--json] [-n N] [--site HOST] [--lang LANG] [--fresh day|week|month|year] [--category CAT] [--engines LIST] [--refresh] [--force]`)
+			return 0
+		case len(a) > 0 && a[0] != '-' && query == "":
+			query = a
+		default:
+			fmt.Fprintf(os.Stderr, "web/search: unknown flag %s\n", a)
+			return 2
+		}
+		i++
+	}
+	if query == "" {
+		fmt.Fprintln(os.Stderr, "web/search: query required")
+		return 2
+	}
+	if site != "" {
+		query = "site:" + site + " " + query
+	}
+	if reason := websearch.PHIReason(query); reason != "" && !force {
+		fmt.Fprintf(os.Stderr, "refused: %s. This query would leave the host.\n", reason)
+		fmt.Fprintln(os.Stderr, "Rephrase without identifiers, or pass --force if it is genuinely public.")
+		return 2
+	}
+
+	params := map[string]string{}
+	if lang != "" {
+		params["language"] = lang
+	}
+	if fresh != "" {
+		params["time_range"] = fresh
+	}
+	if category != "" {
+		params["categories"] = category
+	}
+	if engines != "" {
+		params["engines"] = engines
+	}
+
+	cachePath := os.Getenv("BRAIN_SEARCH_CACHE")
+	if cachePath == "" {
+		cachePath = os.Getenv("HOME") + "/.cache/brain/web-search.sqlite"
+	}
+	cache, err := websearch.OpenCache(cachePath)
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "web/search: cache: %v\n", err)
+		return 1
+	}
+	defer cache.Close()
+
+	key := websearch.CacheKey(query, params)
+	now := float64(time.Now().Unix())
+	if !refresh {
+		if cached, err := cache.Get(key, ttl, now); err != nil {
+			fmt.Fprintf(os.Stderr, "web/search: cache: %v\n", err)
+			return 1
+		} else if cached != nil {
+			out := websearch.Project(*cached, limit, websearch.DefaultSnippetChars)
+			out.Cached = true
+			return writeOut(out, jsonOut)
+		}
+	}
+
+	envPath := os.Getenv("BRAIN_SEARCH_ENV")
+	if envPath == "" {
+		envPath = os.Getenv("HOME") + "/.config/brain/search.env"
+	}
+	conf, err := websearch.LoadConfig(envPath)
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "web/search: %v\n", err)
+		return 1
+	}
+
+	lockPath := cachePath + ".lock"
+	lock, err := os.OpenFile(lockPath, os.O_CREATE|os.O_RDWR, 0o600)
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "web/search: lock: %v\n", err)
+		return 1
+	}
+	defer lock.Close()
+	if err := unix.Flock(int(lock.Fd()), unix.LOCK_EX); err != nil {
+		fmt.Fprintf(os.Stderr, "web/search: lock: %v\n", err)
+		return 1
+	}
+	defer unix.Flock(int(lock.Fd()), unix.LOCK_UN)
+
+	var payload websearch.Payload
+	attempts := 1 + len(websearch.RetryBackoff)
+	client := &http.Client{}
+	for attempt := 0; attempt < attempts; attempt++ {
+		last, err := cache.LastCall()
+		if err != nil {
+			fmt.Fprintf(os.Stderr, "web/search: cache: %v\n", err)
+			return 1
+		}
+		if delay := websearch.WaitFor(last, float64(time.Now().Unix()), websearch.MinInterval); delay > 0 {
+			time.Sleep(time.Duration(delay * float64(time.Second)))
+		}
+		if err := cache.MarkCall(float64(time.Now().Unix())); err != nil {
+			fmt.Fprintf(os.Stderr, "web/search: cache: %v\n", err)
+			return 1
+		}
+		payload, err = websearch.Fetch(client, conf, query, params, time.Duration(timeout)*time.Second)
+		if err != nil {
+			fmt.Fprintf(os.Stderr, "request failed: %v\n", err)
+			return 3
+		}
+		if websearch.Classify(payload) == websearch.StatusOK {
+			break
+		}
+		if attempt < len(websearch.RetryBackoff) {
+			time.Sleep(time.Duration(websearch.RetryBackoff[attempt] * float64(time.Second)))
+		}
+	}
+
+	if websearch.Classify(payload) == websearch.StatusOK {
+		if err := cache.Put(key, payload, float64(time.Now().Unix())); err != nil {
+			fmt.Fprintf(os.Stderr, "web/search: cache: %v\n", err)
+		}
+	}
+	out := websearch.Project(payload, limit, websearch.DefaultSnippetChars)
+	code := writeOut(out, jsonOut)
+	if out.Status != websearch.StatusOK && code == 0 {
+		return 3
+	}
+	return code
+}
+
+func writeOut(out websearch.Output, jsonOut bool) int {
+	if jsonOut {
+		enc := json.NewEncoder(os.Stdout)
+		enc.SetIndent("", "  ")
+		enc.SetEscapeHTML(false)
+		if err := enc.Encode(out); err != nil {
+			return 1
+		}
+		if out.Status != websearch.StatusOK {
+			return 3
+		}
+		return 0
+	}
+	fmt.Print(out.YAML())
+	if out.Status != websearch.StatusOK {
+		return 3
+	}
+	return 0
+}

compose.yaml

@@ -61,6 +61,21 @@ services:
     restart: unless-stopped
     stop_grace_period: 20s
 
+  # Optional local SearXNG (D3). Skip if BRAIN_SEARCH_URL already points at a
+  # live instance — do not run a second copy on that host.
+  #   SEARXNG_SECRET=$(openssl rand -hex 32) docker compose --profile searxng up -d
+  searxng:
+    profiles: ["searxng"]
+    image: docker.io/searxng/searxng:2026.8.10-0a118066d
+    ports:
+      - "127.0.0.1:8888:8080"
+    environment:
+      SEARXNG_SECRET: ${SEARXNG_SECRET:-}
+    volumes:
+      - ./deploy/searxng/settings.yml:/etc/searxng/settings.yml:ro
+      - ./deploy/searxng/limiter.toml:/etc/searxng/limiter.toml:ro
+    restart: unless-stopped
+
 volumes:
   kb-model:
   kb-var:

deploy/searxng/limiter.toml

@@ -0,0 +1,7 @@
+[botdetection.ip_lists]
+# RFC1918 only. Do not copy a live instance egress IP into git.
+pass_ip = [
+  "10.0.0.0/8",
+  "172.16.0.0/12",
+  "192.168.0.0/16",
+]

deploy/searxng/settings.yml

@@ -0,0 +1,28 @@
+use_default_settings: true
+
+general:
+  instance_name: "2dph"
+
+search:
+  formats:
+    - html
+    - json
+  suspended_times:
+    SearxEngineCaptcha: 300
+    SearxEngineTooManyRequests: 120
+    SearxEngineAccessDenied: 300
+
+server:
+  limiter: true
+  image_proxy: false
+  # secret_key comes from SEARXNG_SECRET (never commit a real secret)
+
+engines:
+  - name: bing
+    disabled: false
+  - name: google
+    disabled: false
+  - name: duckduckgo
+    disabled: false
+  - name: wikipedia
+    disabled: false

docs/design.md

@@ -21,6 +21,7 @@ bin/brain/search.go "question"
   1. facts root   — confirmed answers only   → return with evidence links
   2. info  root   — supporting narrative     → snippets, marked (not confirmed)
   3. web-search   — second independent source → upgrade hypothesis to confirmed
+     (`bin/web/search.go`; status `throttled` is not evidence of absence)
 ```
 
 `--hop` is not implemented yet (needs File/FROM_FILE edges). The flag is an

go.mod

@@ -8,7 +8,9 @@ require (
 	github.com/chewxy/math32 v1.11.2
 	github.com/daulet/tokenizers v1.27.0
 	github.com/go-git/go-git/v5 v5.19.2
+	golang.org/x/sys v0.47.0
 	golang.org/x/text v0.40.0
+	modernc.org/sqlite v1.56.0
 )
 
 require (
@@ -18,6 +20,7 @@ require (
 	github.com/apache/arrow-go/v18 v18.6.0 // indirect
 	github.com/cloudflare/circl v1.6.3 // indirect
 	github.com/cyphar/filepath-securejoin v0.6.1 // indirect
+	github.com/dustin/go-humanize v1.0.1 // indirect
 	github.com/emirpasic/gods v1.18.1 // indirect
 	github.com/go-git/gcfg v1.5.1-0.20230307220236-3a3c6141e376 // indirect
 	github.com/go-git/go-billy/v5 v5.9.0 // indirect
@@ -29,8 +32,11 @@ require (
 	github.com/kevinburke/ssh_config v1.2.0 // indirect
 	github.com/klauspost/compress v1.18.5 // indirect
 	github.com/klauspost/cpuid/v2 v2.3.0 // indirect
+	github.com/mattn/go-isatty v0.0.24 // indirect
+	github.com/ncruces/go-strftime v1.0.0 // indirect
 	github.com/pierrec/lz4/v4 v4.1.26 // indirect
 	github.com/pjbgf/sha1cd v0.6.0 // indirect
+	github.com/remyoudompheng/bigfft v0.0.0-20230129092748-24d4a6f8daec // indirect
 	github.com/sergi/go-diff v1.3.2-0.20230802210424-5b0b94c5c0d3 // indirect
 	github.com/shopspring/decimal v1.4.0 // indirect
 	github.com/skeema/knownhosts v1.3.1 // indirect
@@ -39,6 +45,8 @@ require (
 	golang.org/x/crypto v0.53.0 // indirect
 	golang.org/x/exp v0.0.0-20260410095643-746e56fc9e2f // indirect
 	golang.org/x/net v0.56.0 // indirect
-	golang.org/x/sys v0.46.0 // indirect
 	gopkg.in/warnings.v0 v0.1.2 // indirect
+	modernc.org/libc v1.74.4 // indirect
+	modernc.org/mathutil v1.7.1 // indirect
+	modernc.org/memory v1.11.0 // indirect
 )

go.sum

@@ -31,6 +31,8 @@ github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSs
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.2-0.20180830191138-d8f796af33cc h1:U9qPSI2PIWSS1VwoXQT9A3Wy9MM3WgvqSxFWenqJduM=
 github.com/davecgh/go-spew v1.1.2-0.20180830191138-d8f796af33cc/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/dustin/go-humanize v1.0.1 h1:GzkhY7T5VNhEkwH0PVJgjz+fX1rhBrR7pRT3mDkpeCY=
+github.com/dustin/go-humanize v1.0.1/go.mod h1:Mu1zIs6XwVuF/gI1OepvI0qD18qycQx+mFykh5fBlto=
 github.com/elazarl/goproxy v1.7.2 h1:Y2o6urb7Eule09PjlhQRGNsqRfPmYI3KKQLFpCAV3+o=
 github.com/elazarl/goproxy v1.7.2/go.mod h1:82vkLNir0ALaW14Rc399OTTjyNREgmdL2cVoIbS6XaE=
 github.com/emirpasic/gods v1.18.1 h1:FXtiHYKDGKCW2KzwZKx0iC0PQmdlorYgdFG9jPXJ1Bc=
@@ -53,8 +55,12 @@ github.com/google/flatbuffers v25.12.19+incompatible h1:haMV2JRRJCe1998HeW/p0X9U
 github.com/google/flatbuffers v25.12.19+incompatible/go.mod h1:1AeVuKshWv4vARoZatz6mlQ0JxURH0Kv5+zNeJKJCa8=
 github.com/google/go-cmp v0.7.0 h1:wk8382ETsv4JYUZwIsn6YpYiWiBsYLSJiTsyBybVuN8=
 github.com/google/go-cmp v0.7.0/go.mod h1:pXiqmnSA92OHEEa9HXL2W4E7lf9JzCmGVUdgjX3N/iU=
+github.com/google/pprof v0.0.0-20260802141513-ef3492d7dac3 h1:LMLX+LgTNWpfvCBdFebv6EsYotImrt/Ppc5cXIriCSo=
+github.com/google/pprof v0.0.0-20260802141513-ef3492d7dac3/go.mod h1:jl5iWTm0/hd5PjEYEOuwAJ57L/CibdZfrqZ5XA5GrCk=
 github.com/google/uuid v1.6.0 h1:NIvaJDMOsjHA8n1jAhLSgzrAzy1Hgr+hNrb57e+94F0=
 github.com/google/uuid v1.6.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
+github.com/hashicorp/golang-lru/v2 v2.0.7 h1:a+bsQ5rvGLjzHuww6tVxozPZFVghXaHOwFs4luLUK2k=
+github.com/hashicorp/golang-lru/v2 v2.0.7/go.mod h1:QeFd9opnmA6QUJc5vARoKUSoFhyfM2/ZepoAG6RGpeM=
 github.com/jbenet/go-context v0.0.0-20150711004518-d14ea06fba99 h1:BQSFePA1RWJOlocH6Fxy8MmwDt+yVQYULKfN0RoTN8A=
 github.com/jbenet/go-context v0.0.0-20150711004518-d14ea06fba99/go.mod h1:1lJo3i6rXxKeerYnT8Nvf0QmHCRC1n8sfWVwXF2Frvo=
 github.com/kevinburke/ssh_config v1.2.0 h1:x584FjTGwHzMwvHx18PXxbBVzfnxogHaAReU4gf13a4=
@@ -70,6 +76,10 @@ github.com/kr/pty v1.1.1/go.mod h1:pFQYn66WHrOpPYNljwOMqo10TkYh1fy3cYio2l3bCsQ=
 github.com/kr/text v0.1.0/go.mod h1:4Jbv+DJW3UT/LiOwJeYQe1efqtUx/iVham/4vfdArNI=
 github.com/kr/text v0.2.0 h1:5Nx0Ya0ZqY2ygV366QzturHI13Jq95ApcVaJBhpS+AY=
 github.com/kr/text v0.2.0/go.mod h1:eLer722TekiGuMkidMxC/pM04lWEeraHUUmBw8l2grE=
+github.com/mattn/go-isatty v0.0.24 h1:tGZZoVgT/KiqK1c8ocVLeDS8BSWMRd47J3Lbz7vsReI=
+github.com/mattn/go-isatty v0.0.24/go.mod h1:nMCL3Zebbrt45jsMDgnfIwz6ydEQApk5oEI3HqDio6A=
+github.com/ncruces/go-strftime v1.0.0 h1:HMFp8mLCTPp341M/ZnA4qaf7ZlsbTc+miZjCLOFAw7w=
+github.com/ncruces/go-strftime v1.0.0/go.mod h1:Fwc5htZGVVkseilnfgOVb9mKy6w1naJmn9CehxcKcls=
 github.com/onsi/gomega v1.34.1 h1:EUMJIKUjM8sKjYbtxQI9A4z2o+rruxnzNvpknOXie6k=
 github.com/onsi/gomega v1.34.1/go.mod h1:kU1QgUvBDLXBJq618Xvm2LUX6rSAfRaFRTcdOeDLwwY=
 github.com/pierrec/lz4/v4 v4.1.26 h1:GrpZw1gZttORinvzBdXPUXATeqlJjqUG/D87TKMnhjY=
@@ -81,6 +91,8 @@ github.com/pkg/errors v0.9.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINE
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
 github.com/pmezard/go-difflib v1.0.1-0.20181226105442-5d4384ee4fb2 h1:Jamvg5psRIccs7FGNTlIRMkT8wgtp5eCXdBlqhYGL6U=
 github.com/pmezard/go-difflib v1.0.1-0.20181226105442-5d4384ee4fb2/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/remyoudompheng/bigfft v0.0.0-20230129092748-24d4a6f8daec h1:W09IVJc94icq4NjY3clb7Lk8O1qJ8BdBEF8z0ibU0rE=
+github.com/remyoudompheng/bigfft v0.0.0-20230129092748-24d4a6f8daec/go.mod h1:qqbHyh8v60DhA7CoWK5oRCqLrMHRGoxYCSS9EjAz6Eo=
 github.com/rogpeppe/go-internal v1.14.1 h1:UQB4HGPB6osV0SQTLymcB4TgvyWu6ZyliaW0tI/otEQ=
 github.com/rogpeppe/go-internal v1.14.1/go.mod h1:MaRKkUm5W0goXpeCfT7UZI6fk/L7L7so1lCWt35ZSgc=
 github.com/sergi/go-diff v1.3.2-0.20230802210424-5b0b94c5c0d3 h1:n661drycOFuPLCN3Uc8sB6B/s6Z4t2xvBgU1htSHuq8=
@@ -106,17 +118,21 @@ golang.org/x/crypto v0.53.0 h1:QZ4Muo8THX6CizN2vPPd5fBGHyogrdK9fG4wLPFUsto=
 golang.org/x/crypto v0.53.0/go.mod h1:DNLU434OwVakk9PzuwV8w62mAJpRJL3vsgcfp4Qnsio=
 golang.org/x/exp v0.0.0-20260410095643-746e56fc9e2f h1:W3F4c+6OLc6H2lb//N1q4WpJkhzJCK5J6kUi1NTVXfM=
 golang.org/x/exp v0.0.0-20260410095643-746e56fc9e2f/go.mod h1:J1xhfL/vlindoeF/aINzNzt2Bket5bjo9sdOYzOsU80=
+golang.org/x/mod v0.37.0 h1:vF1DjpVEshcIqoEaauuHebaLk1O1forxjxBaVn884JQ=
+golang.org/x/mod v0.37.0/go.mod h1:m8S8VeM9r4dzDwjrKO0a1sZP3YjeMamRRlD+fmR2Q/0=
 golang.org/x/net v0.0.0-20211112202133-69e39bad7dc2/go.mod h1:9nx3DQGgdP8bBQD5qxJ1jj9UTztislL4KSBs9R2vV5Y=
 golang.org/x/net v0.56.0 h1:Rw8j/hFzGvJUZwNBXnAtf5sVDVt+65SK2C7IxCxZt5o=
 golang.org/x/net v0.56.0/go.mod h1:D3Ku6r+V6JROoZK144D2XfMHFcMq/0zSfLelVTCFKec=
+golang.org/x/sync v0.22.0 h1:SZjpbeLmrCk4xhRSZFNZW5gFUeCeFgjekvI/+gfScek=
+golang.org/x/sync v0.22.0/go.mod h1:9xrNwdLfx4jkKbNva9FpL6vEN7evnE43NNNJQ2LF3+0=
 golang.org/x/sys v0.0.0-20191026070338-33540a1f6037/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210124154548-22da62e12c0c/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210423082822-04245dca01da/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210615035016-665e8c7367d1/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20220715151400-c0bba94af5f8/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.46.0 h1:noSf2Fq6F8DBgS+LysIkx7rIExoNHJsxOAtPp4rthXw=
-golang.org/x/sys v0.46.0/go.mod h1:4GL1E5IUh+htKOUEOaiffhrAeqysfVGipDYzABqnCmw=
+golang.org/x/sys v0.47.0 h1:o7XGOvZQCADBQQ4Y7VNq2dRWQR7JmOUW8Kxx4ZsNgWs=
+golang.org/x/sys v0.47.0/go.mod h1:4GL1E5IUh+htKOUEOaiffhrAeqysfVGipDYzABqnCmw=
 golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
 golang.org/x/term v0.44.0 h1:0rLvDRCtNj0gZkyIXhCyOb2OAzEhLVqc4B+hrsBhrmc=
 golang.org/x/term v0.44.0/go.mod h1:7ze4MdzUzLXpSAoFP1H0bOI9aXDqveSvatT5vKcFh2Y=
@@ -124,6 +140,8 @@ golang.org/x/text v0.3.6/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
 golang.org/x/text v0.40.0 h1:Ub2Z6/xjgF1WrYQz2nuITOEegKFtiIy+rieRJ5lHZKs=
 golang.org/x/text v0.40.0/go.mod h1:hpnzDAfGV753zIKo+wk3u1bVKCGPbrnF7+7LBF/UHVY=
 golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
+golang.org/x/tools v0.47.0 h1:7Kn5x/d1svx/PzryTsqeoZN4TZwqeH5pGWjefhLi/1Q=
+golang.org/x/tools v0.47.0/go.mod h1:dFHnyTvFWY212G+h7ZY4Vsp/K3U4/7W9TyVaAul8uCA=
 gonum.org/v1/gonum v0.17.0 h1:VbpOemQlsSMrYmn7T2OUvQ4dqxQXU+ouZFQsZOx50z4=
 gonum.org/v1/gonum v0.17.0/go.mod h1:El3tOrEuMpv2UdMrbNlKEh9vd86bmQ6vqIcDwxEOc1E=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
@@ -136,3 +154,31 @@ gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.4.0/go.mod h1:RDklbk79AGWmwhnvt/jBztapEOGDOx6ZbXqjP6csGnQ=
 gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
 gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
+modernc.org/cc/v4 v4.29.1 h1:MKgdCV3WykTSPqpVrnxdEDS0HEd2FHpKZDzxzU5LyeI=
+modernc.org/cc/v4 v4.29.1/go.mod h1:OnovgIhbbMXMu1aISnJ0wvVD1KnW+cAUJkIrAWh+kVI=
+modernc.org/ccgo/v4 v4.34.6 h1:sBgfIwyN0TQ9C5hwIeuqyeAKyMWnbvj2fvpF4L11uzU=
+modernc.org/ccgo/v4 v4.34.6/go.mod h1:SZ8YcN9NG7XVsQYdm6jYBvi8PQP1qi+kqB6OhjqI3Fk=
+modernc.org/fileutil v1.4.0 h1:j6ZzNTftVS054gi281TyLjHPp6CPHr2KCxEXjEbD6SM=
+modernc.org/fileutil v1.4.0/go.mod h1:EqdKFDxiByqxLk8ozOxObDSfcVOv/54xDs/DUHdvCUU=
+modernc.org/gc/v2 v2.6.5 h1:nyqdV8q46KvTpZlsw66kWqwXRHdjIlJOhG6kxiV/9xI=
+modernc.org/gc/v2 v2.6.5/go.mod h1:YgIahr1ypgfe7chRuJi2gD7DBQiKSLMPgBQe9oIiito=
+modernc.org/gc/v3 v3.1.4 h1:2g65LGVSmFQrXeITAw97x7hCRvZFcyE1uDP+7Vng7JI=
+modernc.org/gc/v3 v3.1.4/go.mod h1:HFK/6AGESC7Ex+EZJhJ2Gni6cTaYpSMmU/cT9RmlfYY=
+modernc.org/goabi0 v0.2.0 h1:HvEowk7LxcPd0eq6mVOAEMai46V+i7Jrj13t4AzuNks=
+modernc.org/goabi0 v0.2.0/go.mod h1:CEFRnnJhKvWT1c1JTI3Avm+tgOWbkOu5oPA8eH8LnMI=
+modernc.org/libc v1.74.4 h1:fX1Omw4o2/1C2iRkkIsrQTasJQldLhRmuPreXLoWs9k=
+modernc.org/libc v1.74.4/go.mod h1:eeQAS9W3sZeKYMFubydxJpII9ybHWshk+7or7bLG9co=
+modernc.org/mathutil v1.7.1 h1:GCZVGXdaN8gTqB1Mf/usp1Y/hSqgI2vAGGP4jZMCxOU=
+modernc.org/mathutil v1.7.1/go.mod h1:4p5IwJITfppl0G4sUEDtCr4DthTaT47/N3aT6MhfgJg=
+modernc.org/memory v1.11.0 h1:o4QC8aMQzmcwCK3t3Ux/ZHmwFPzE6hf2Y5LbkRs+hbI=
+modernc.org/memory v1.11.0/go.mod h1:/JP4VbVC+K5sU2wZi9bHoq2MAkCnrt2r98UGeSK7Mjw=
+modernc.org/opt v0.2.0 h1:tGyef5ApycA7FSEOMraay9SaTk5zmbx7Tu+cJs4QKZg=
+modernc.org/opt v0.2.0/go.mod h1:03fq9lsNfvkYSfxrfUhZCWPk1lm4cq4N+Bh//bEtgns=
+modernc.org/sortutil v1.2.1 h1:+xyoGf15mM3NMlPDnFqrteY07klSFxLElE2PVuWIJ7w=
+modernc.org/sortutil v1.2.1/go.mod h1:7ZI3a3REbai7gzCLcotuw9AC4VZVpYMjDzETGsSMqJE=
+modernc.org/sqlite v1.56.0 h1:/D8e2RfFqoy/Zc6PuC76U28zFwmI/sYx1Kjm4yEn9e0=
+modernc.org/sqlite v1.56.0/go.mod h1:yCJ2cmAaIkHQ25oXWrF8H4O1lIfPYPR26yCEDj2P3pQ=
+modernc.org/strutil v1.2.1 h1:UneZBkQA+DX2Rp35KcM69cSsNES9ly8mQWD71HKlOA0=
+modernc.org/strutil v1.2.1/go.mod h1:EHkiggD70koQxjVdSBM3JKM7k6L0FbGE5eymy9i3B9A=
+modernc.org/token v1.1.0 h1:Xl7Ap9dKaEs5kLoOQeQmPWevfnk/DM5qcLcYlA8ys6Y=
+modernc.org/token v1.1.0/go.mod h1:UGzOrNV1mAFSEB63lOFHIpNRUVMvYTc6yu1SMY/XTDM=

internal/websearch/cache.go

@@ -0,0 +1,97 @@
+package websearch
+
+import (
+	"database/sql"
+	"encoding/json"
+	"os"
+	"path/filepath"
+
+	_ "modernc.org/sqlite"
+)
+
+const cacheSchema = `
+CREATE TABLE IF NOT EXISTS responses (
+  key     TEXT PRIMARY KEY,
+  fetched REAL NOT NULL,
+  payload TEXT NOT NULL
+);
+CREATE TABLE IF NOT EXISTS meta (
+  key   TEXT PRIMARY KEY,
+  value REAL NOT NULL
+);
+`
+
+type Cache struct {
+	db *sql.DB
+}
+
+func OpenCache(path string) (*Cache, error) {
+	if err := os.MkdirAll(filepath.Dir(path), 0o700); err != nil {
+		return nil, err
+	}
+	db, err := sql.Open("sqlite", path)
+	if err != nil {
+		return nil, err
+	}
+	if _, err := db.Exec(cacheSchema); err != nil {
+		db.Close()
+		return nil, err
+	}
+	return &Cache{db: db}, nil
+}
+
+func (c *Cache) Close() error {
+	if c == nil || c.db == nil {
+		return nil
+	}
+	return c.db.Close()
+}
+
+func (c *Cache) Get(key string, ttl, now float64) (*Payload, error) {
+	var fetched float64
+	var raw string
+	err := c.db.QueryRow("SELECT fetched, payload FROM responses WHERE key = ?", key).Scan(&fetched, &raw)
+	if err == sql.ErrNoRows {
+		return nil, nil
+	}
+	if err != nil {
+		return nil, err
+	}
+	if now-fetched > ttl {
+		return nil, nil
+	}
+	var p Payload
+	if err := json.Unmarshal([]byte(raw), &p); err != nil {
+		return nil, err
+	}
+	return &p, nil
+}
+
+func (c *Cache) Put(key string, p Payload, now float64) error {
+	raw, err := json.Marshal(p)
+	if err != nil {
+		return err
+	}
+	_, err = c.db.Exec(
+		"INSERT OR REPLACE INTO responses (key, fetched, payload) VALUES (?, ?, ?)",
+		key, now, string(raw),
+	)
+	return err
+}
+
+func (c *Cache) LastCall() (*float64, error) {
+	var v float64
+	err := c.db.QueryRow("SELECT value FROM meta WHERE key = 'last_call'").Scan(&v)
+	if err == sql.ErrNoRows {
+		return nil, nil
+	}
+	if err != nil {
+		return nil, err
+	}
+	return &v, nil
+}
+
+func (c *Cache) MarkCall(now float64) error {
+	_, err := c.db.Exec("INSERT OR REPLACE INTO meta (key, value) VALUES ('last_call', ?)", now)
+	return err
+}

internal/websearch/fetch.go

@@ -0,0 +1,90 @@
+package websearch
+
+import (
+	"encoding/base64"
+	"encoding/json"
+	"fmt"
+	"io"
+	"net/http"
+	"net/url"
+	"os"
+	"strings"
+	"time"
+)
+
+type Config struct {
+	URL  string
+	User string
+	Pass string
+}
+
+func LoadConfig(path string) (Config, error) {
+	raw, err := os.ReadFile(path)
+	if err != nil {
+		return Config{}, fmt.Errorf("no credentials at %s (mode 600, BRAIN_SEARCH_URL)", path)
+	}
+	conf := map[string]string{}
+	for _, line := range strings.Split(string(raw), "\n") {
+		line = strings.TrimSpace(line)
+		if line == "" || strings.HasPrefix(line, "#") || !strings.Contains(line, "=") {
+			continue
+		}
+		k, v, _ := strings.Cut(line, "=")
+		v = strings.TrimSpace(v)
+		v = strings.Trim(v, `"'`)
+		conf[strings.TrimSpace(k)] = v
+	}
+	out := Config{
+		URL:  conf["BRAIN_SEARCH_URL"],
+		User: conf["BRAIN_SEARCH_USER"],
+		Pass: conf["BRAIN_SEARCH_PASS"],
+	}
+	if out.URL == "" {
+		return Config{}, fmt.Errorf("%s is missing BRAIN_SEARCH_URL", path)
+	}
+	return out, nil
+}
+
+func Fetch(client *http.Client, conf Config, query string, params map[string]string, timeout time.Duration) (Payload, error) {
+	if client == nil {
+		client = &http.Client{Timeout: timeout}
+	} else if timeout > 0 {
+		c := *client
+		c.Timeout = timeout
+		client = &c
+	}
+	q := url.Values{}
+	q.Set("q", query)
+	q.Set("format", "json")
+	for k, v := range params {
+		if v != "" {
+			q.Set(k, v)
+		}
+	}
+	u := strings.TrimRight(conf.URL, "/") + "/search?" + q.Encode()
+	req, err := http.NewRequest(http.MethodGet, u, nil)
+	if err != nil {
+		return Payload{}, err
+	}
+	if conf.User != "" || conf.Pass != "" {
+		token := base64.StdEncoding.EncodeToString([]byte(conf.User + ":" + conf.Pass))
+		req.Header.Set("Authorization", "Basic "+token)
+	}
+	resp, err := client.Do(req)
+	if err != nil {
+		return Payload{}, err
+	}
+	defer resp.Body.Close()
+	body, err := io.ReadAll(io.LimitReader(resp.Body, 8<<20))
+	if err != nil {
+		return Payload{}, err
+	}
+	if resp.StatusCode >= 400 {
+		return Payload{}, fmt.Errorf("HTTP %d", resp.StatusCode)
+	}
+	var p Payload
+	if err := json.Unmarshal(body, &p); err != nil {
+		return Payload{}, err
+	}
+	return p, nil
+}

internal/websearch/fetch_test.go

@@ -0,0 +1,77 @@
+package websearch
+
+import (
+	"encoding/json"
+	"net/http"
+	"net/http/httptest"
+	"os"
+	"path/filepath"
+	"testing"
+	"time"
+)
+
+func TestLoadConfigRequiresURL(t *testing.T) {
+	dir := t.TempDir()
+	p := filepath.Join(dir, "search.env")
+	if err := os.WriteFile(p, []byte("BRAIN_SEARCH_USER=x\n"), 0o600); err != nil {
+		t.Fatal(err)
+	}
+	if _, err := LoadConfig(p); err == nil {
+		t.Fatal("expected missing URL error")
+	}
+}
+
+func TestLoadConfigOptionalAuth(t *testing.T) {
+	dir := t.TempDir()
+	p := filepath.Join(dir, "search.env")
+	if err := os.WriteFile(p, []byte("BRAIN_SEARCH_URL=http://127.0.0.1:8080\n"), 0o600); err != nil {
+		t.Fatal(err)
+	}
+	c, err := LoadConfig(p)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if c.URL != "http://127.0.0.1:8080" || c.User != "" || c.Pass != "" {
+		t.Fatalf("%+v", c)
+	}
+}
+
+func TestFetchJSONNoBasicAuth(t *testing.T) {
+	payload := Payload{Query: "x", Results: []RawHit{{Title: "t", URL: "http://example.com", Content: "c", Engine: "bing"}}}
+	var sawAuth string
+	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		sawAuth = r.Header.Get("Authorization")
+		if r.URL.Query().Get("format") != "json" || r.URL.Query().Get("q") != "x" {
+			t.Errorf("query = %s", r.URL.RawQuery)
+		}
+		w.Header().Set("Content-Type", "application/json")
+		json.NewEncoder(w).Encode(payload)
+	}))
+	defer srv.Close()
+	got, err := Fetch(srv.Client(), Config{URL: srv.URL}, "x", nil, 2*time.Second)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if sawAuth != "" {
+		t.Fatalf("Authorization = %q, want empty for local instance", sawAuth)
+	}
+	if Classify(got) != StatusOK {
+		t.Fatalf("classify = %s", Classify(got))
+	}
+}
+
+func TestFetchSendsBasicAuthWhenConfigured(t *testing.T) {
+	var sawAuth string
+	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		sawAuth = r.Header.Get("Authorization")
+		w.Write([]byte(`{"query":"x","results":[]}`))
+	}))
+	defer srv.Close()
+	_, err := Fetch(srv.Client(), Config{URL: srv.URL, User: "u", Pass: "p"}, "x", nil, 2*time.Second)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if sawAuth == "" {
+		t.Fatal("expected Basic auth")
+	}
+}

internal/websearch/websearch.go

@@ -0,0 +1,205 @@
+// Package websearch is the SearXNG client used as the second independent source.
+//
+// An empty result list from this instance is throttling, not evidence of absence.
+package websearch
+
+import (
+	"crypto/sha256"
+	"encoding/hex"
+	"encoding/json"
+	"fmt"
+	"regexp"
+	"strings"
+	"unicode"
+	"unicode/utf8"
+)
+
+const (
+	StatusOK        = "ok"
+	StatusThrottled = "throttled"
+
+	DefaultLimit        = 5
+	DefaultSnippetChars = 150
+	MinInterval         = 10.0
+	CacheTTL            = 7 * 24 * 3600
+)
+
+var RetryBackoff = []float64{20, 60}
+
+type Payload struct {
+	Query               string     `json:"query"`
+	Results             []RawHit   `json:"results"`
+	UnresponsiveEngines [][]string `json:"unresponsive_engines"`
+}
+
+type RawHit struct {
+	Title   string `json:"title"`
+	URL     string `json:"url"`
+	Content string `json:"content"`
+	Engine  string `json:"engine"`
+}
+
+type Hit struct {
+	Rank    int    `json:"rank"`
+	Title   string `json:"title"`
+	URL     string `json:"url"`
+	Snippet string `json:"snippet"`
+	Engine  string `json:"engine"`
+}
+
+type Output struct {
+	Query        string   `json:"query"`
+	Status       string   `json:"status"`
+	Results      []Hit    `json:"results"`
+	Unresponsive []string `json:"unresponsive,omitempty"`
+	Note         string   `json:"note,omitempty"`
+	Cached       bool     `json:"cached,omitempty"`
+}
+
+func Classify(p Payload) string {
+	if len(p.Results) > 0 {
+		return StatusOK
+	}
+	return StatusThrottled
+}
+
+func Project(p Payload, limit, snippetChars int) Output {
+	if limit <= 0 {
+		limit = DefaultLimit
+	}
+	if snippetChars <= 0 {
+		snippetChars = DefaultSnippetChars
+	}
+	status := Classify(p)
+	n := limit
+	if n > len(p.Results) {
+		n = len(p.Results)
+	}
+	hits := make([]Hit, 0, n)
+	for i := 0; i < n; i++ {
+		item := p.Results[i]
+		hits = append(hits, Hit{
+			Rank:    i + 1,
+			Title:   item.Title,
+			URL:     item.URL,
+			Snippet: trimSnippet(item.Content, snippetChars),
+			Engine:  item.Engine,
+		})
+	}
+	out := Output{
+		Query:   p.Query,
+		Status:  status,
+		Results: hits,
+	}
+	for _, pair := range p.UnresponsiveEngines {
+		if len(pair) >= 2 {
+			out.Unresponsive = append(out.Unresponsive, pair[0]+": "+pair[1])
+		} else if len(pair) == 1 {
+			out.Unresponsive = append(out.Unresponsive, pair[0])
+		}
+	}
+	if status == StatusThrottled {
+		out.Note = "no engine answered - this is a throttled instance, not evidence that nothing exists"
+	}
+	return out
+}
+
+var spaceRE = regexp.MustCompile(`\s+`)
+
+func trimSnippet(s string, max int) string {
+	s = strings.TrimSpace(spaceRE.ReplaceAllString(s, " "))
+	if utf8.RuneCountInString(s) <= max {
+		return s
+	}
+	runes := []rune(s)
+	cut := strings.TrimRightFunc(string(runes[:max]), unicode.IsSpace)
+	return cut + "..."
+}
+
+func CacheKey(query string, params map[string]string) string {
+	norm := strings.Join(strings.Fields(strings.ToLower(query)), " ")
+	if params == nil {
+		params = map[string]string{}
+	}
+	stable, _ := json.Marshal(params)
+	sum := sha256.Sum256([]byte(norm + "\x00" + string(stable)))
+	return hex.EncodeToString(sum[:])
+}
+
+func WaitFor(last *float64, now, interval float64) float64 {
+	if last == nil {
+		return 0
+	}
+	d := interval - (now - *last)
+	if d < 0 {
+		return 0
+	}
+	return d
+}
+
+func PHIReason(query string) string {
+	for _, p := range phiPatterns {
+		if p.re.MatchString(query) {
+			return p.reason
+		}
+	}
+	return ""
+}
+
+type phiPat struct {
+	re     *regexp.Regexp
+	reason string
+}
+
+var phiPatterns = []phiPat{
+	{regexp.MustCompile(`\d{6,}`), "a run of six or more digits looks like an ID"},
+	{regexp.MustCompile(`(?i)\bpersonalnummer\b`), "Personalnummer is staff data"},
+	{regexp.MustCompile(`(?i)\bkv[-\s]?nr\b`), "KV-Nr is an insurance number"},
+	{regexp.MustCompile(`(?i)\bversichertennummer\b`), "insurance number"},
+	{regexp.MustCompile(`(?i)\b[A-Za-zÄÖÜäöüß]+(?:stra(?:ss|ß)e|str\.)\s*\d+`), "a street with a house number looks like an address"},
+	{regexp.MustCompile(`(?i)\bgeb(?:urtsdatum)?\.?\s*\d{1,2}[./]\d{1,2}[./]\d{2,4}`), "a date of birth"},
+}
+
+func (o Output) YAML() string {
+	var b strings.Builder
+	fmt.Fprintf(&b, "query: %s\n", yamlScalar(o.Query))
+	fmt.Fprintf(&b, "status: %s\n", yamlScalar(o.Status))
+	if len(o.Results) == 0 {
+		b.WriteString("results: []\n")
+	} else {
+		b.WriteString("results:\n")
+		for _, r := range o.Results {
+			b.WriteString("-\n")
+			fmt.Fprintf(&b, "  rank: %d\n", r.Rank)
+			fmt.Fprintf(&b, "  title: %s\n", yamlScalar(r.Title))
+			fmt.Fprintf(&b, "  url: %s\n", yamlScalar(r.URL))
+			fmt.Fprintf(&b, "  snippet: %s\n", yamlScalar(r.Snippet))
+			fmt.Fprintf(&b, "  engine: %s\n", yamlScalar(r.Engine))
+		}
+	}
+	if len(o.Unresponsive) > 0 {
+		b.WriteString("unresponsive:\n")
+		for _, u := range o.Unresponsive {
+			fmt.Fprintf(&b, "- %s\n", yamlScalar(u))
+		}
+	}
+	if o.Note != "" {
+		fmt.Fprintf(&b, "note: %s\n", yamlScalar(o.Note))
+	}
+	if o.Cached {
+		b.WriteString("cached: true\n")
+	}
+	return b.String()
+}
+
+func yamlScalar(s string) string {
+	if strings.Contains(s, "\n") {
+		b, _ := json.Marshal(s)
+		return string(b)
+	}
+	if s == "" || strings.ContainsAny(s, ":#'\"[]{}&*!|>%@`") || s != strings.TrimSpace(s) {
+		b, _ := json.Marshal(s)
+		return string(b)
+	}
+	return s
+}

internal/websearch/websearch_test.go

@@ -0,0 +1,203 @@
+package websearch
+
+import (
+	"encoding/json"
+	"os"
+	"path/filepath"
+	"runtime"
+	"strings"
+	"testing"
+	"unicode/utf8"
+)
+
+func loadFixture(t *testing.T, name string) Payload {
+	t.Helper()
+	_, file, _, ok := runtime.Caller(0)
+	if !ok {
+		t.Fatal("runtime.Caller")
+	}
+	path := filepath.Join(filepath.Dir(file), "..", "..", "bin", "tools", "web-search", "fixtures", name)
+	raw, err := os.ReadFile(path)
+	if err != nil {
+		t.Fatal(err)
+	}
+	var p Payload
+	if err := json.Unmarshal(raw, &p); err != nil {
+		t.Fatal(err)
+	}
+	return p
+}
+
+func TestClassifyHealthyIsOK(t *testing.T) {
+	if got := Classify(loadFixture(t, "healthy.json")); got != StatusOK {
+		t.Fatalf("classify healthy = %q, want ok", got)
+	}
+}
+
+func TestClassifyEmptyIsThrottledNotEmpty(t *testing.T) {
+	got := Classify(loadFixture(t, "throttled.json"))
+	if got != StatusThrottled {
+		t.Fatalf("classify empty = %q, want throttled", got)
+	}
+	if got == "empty" || got == "no_results" {
+		t.Fatal("status must never sound like absence")
+	}
+}
+
+func TestProjectKeepsContextFields(t *testing.T) {
+	out := Project(loadFixture(t, "healthy.json"), 3, DefaultSnippetChars)
+	if out.Status != StatusOK {
+		t.Fatalf("status = %q", out.Status)
+	}
+	if len(out.Results) != 3 {
+		t.Fatalf("len = %d, want 3", len(out.Results))
+	}
+	r := out.Results[0]
+	if r.Rank != 1 || r.Title == "" || r.URL == "" {
+		t.Fatalf("hit = %+v", r)
+	}
+}
+
+func TestProjectTrimsSnippet(t *testing.T) {
+	out := Project(loadFixture(t, "healthy.json"), 5, 40)
+	for _, r := range out.Results {
+		n := utf8.RuneCountInString(r.Snippet)
+		if n > 43 {
+			t.Fatalf("snippet len %d > 43: %q", n, r.Snippet)
+		}
+	}
+}
+
+func TestProjectIsCheaperThanRaw(t *testing.T) {
+	raw, err := os.ReadFile(filepath.Join(fixtureDir(t), "healthy.json"))
+	if err != nil {
+		t.Fatal(err)
+	}
+	out, err := json.Marshal(Project(loadFixture(t, "healthy.json"), 5, DefaultSnippetChars))
+	if err != nil {
+		t.Fatal(err)
+	}
+	if len(out)*3 >= len(raw) {
+		t.Fatalf("projected %d not cheaper than raw %d", len(out), len(raw))
+	}
+}
+
+func TestThrottledProjectionCarriesEngineReasons(t *testing.T) {
+	out := Project(loadFixture(t, "throttled.json"), 5, DefaultSnippetChars)
+	if out.Status != StatusThrottled {
+		t.Fatalf("status = %q", out.Status)
+	}
+	if len(out.Results) != 0 {
+		t.Fatalf("results = %v", out.Results)
+	}
+	if len(out.Unresponsive) == 0 {
+		t.Fatal("unresponsive empty")
+	}
+	if !strings.Contains(out.Note, "not evidence that nothing exists") {
+		t.Fatalf("note = %q", out.Note)
+	}
+}
+
+func TestCacheKeyStable(t *testing.T) {
+	if CacheKey("Pflegegrad", nil) != CacheKey("Pflegegrad", map[string]string{}) {
+		t.Fatal("nil vs empty params")
+	}
+	if CacheKey("  Pflegegrad ", nil) != CacheKey("pflegegrad", nil) {
+		t.Fatal("case/padding")
+	}
+	if CacheKey("x", map[string]string{"lang": "de"}) == CacheKey("x", nil) {
+		t.Fatal("params must change key")
+	}
+	a := CacheKey("x", map[string]string{"a": "1", "b": "2"})
+	b := CacheKey("x", map[string]string{"b": "2", "a": "1"})
+	if a != b {
+		t.Fatal("param order must not change key")
+	}
+}
+
+func TestPHIGuard(t *testing.T) {
+	if PHIReason("Pflegegrad SGB XI Einstufung") != "" {
+		t.Fatal("technical query refused")
+	}
+	if PHIReason("site:example.com technical query") != "" {
+		t.Fatal("site query refused")
+	}
+	if PHIReason("SGB XI Paragraph 45b") != "" {
+		t.Fatal("short numbers refused")
+	}
+	if PHIReason("Kunde 4711220385 Adresse") == "" {
+		t.Fatal("long digit run allowed")
+	}
+	if PHIReason("KV-Nr A123456789") == "" {
+		t.Fatal("KV-Nr allowed")
+	}
+	if PHIReason("Hauptstraße 14 Berlin") == "" {
+		t.Fatal("street allowed")
+	}
+	if PHIReason("Lindenstr. 7") == "" {
+		t.Fatal("str. allowed")
+	}
+	if PHIReason("Personalnummer 12") == "" {
+		t.Fatal("Personalnummer allowed")
+	}
+}
+
+func TestWaitFor(t *testing.T) {
+	last := 100.0
+	if got := WaitFor(&last, 104.0, 10); got != 6 {
+		t.Fatalf("wait = %v, want 6", got)
+	}
+	if got := WaitFor(&last, 130.0, 10); got != 0 {
+		t.Fatalf("wait = %v, want 0", got)
+	}
+	if got := WaitFor(nil, 130.0, 10); got != 0 {
+		t.Fatalf("first call wait = %v", got)
+	}
+}
+
+func TestSQLiteCacheRoundTrip(t *testing.T) {
+	dir := t.TempDir()
+	c, err := OpenCache(filepath.Join(dir, "web-search.sqlite"))
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer c.Close()
+	p := loadFixture(t, "healthy.json")
+	key := CacheKey("pflegegrad", nil)
+	if got, err := c.Get(key, CacheTTL, 1_000); err != nil || got != nil {
+		t.Fatalf("empty get = %v %v", got, err)
+	}
+	if err := c.Put(key, p, 1_000); err != nil {
+		t.Fatal(err)
+	}
+	got, err := c.Get(key, CacheTTL, 1_001)
+	if err != nil || got == nil {
+		t.Fatalf("get = %v %v", got, err)
+	}
+	if Classify(*got) != StatusOK {
+		t.Fatalf("cached classify = %s", Classify(*got))
+	}
+	expired, err := c.Get(key, 10, 2_000)
+	if err != nil || expired != nil {
+		t.Fatalf("expired = %v %v", expired, err)
+	}
+	if v, err := c.LastCall(); err != nil || v != nil {
+		t.Fatalf("last = %v %v", v, err)
+	}
+	if err := c.MarkCall(50); err != nil {
+		t.Fatal(err)
+	}
+	v, err := c.LastCall()
+	if err != nil || v == nil || *v != 50 {
+		t.Fatalf("last after mark = %v %v", v, err)
+	}
+}
+
+func fixtureDir(t *testing.T) string {
+	t.Helper()
+	_, file, _, ok := runtime.Caller(0)
+	if !ok {
+		t.Fatal("runtime.Caller")
+	}
+	return filepath.Join(filepath.Dir(file), "..", "..", "bin", "tools", "web-search", "fixtures")
+}

skills/web-search/SKILL.md

@@ -1,25 +1,30 @@
 ---
 name: web-search
 description: >-
-  Search the public web through the self-hosted SearXNG at search.ops.io
-  using bin/web/search. Use for German care law, SGB paragraphs, vendor
-  documentation and any fact that is not in our own repos - and as the second
-  independent source the detective method requires.
+  Search the public web through SearXNG using bin/web/search.go. Use for vendor
+  documentation, public standards, and any fact that is not in our own repos —
+  and as the second independent source the detective method requires.
 ---
 
 # web-search
 
 ```bash
-bin/web/search "LadybugDB vector index"
-bin/web/search "model2vec multilingual" --category it
-bin/web/search "hypervisor" --site ops.io --json | jq -r '.results[].url'
-bin/web/search "postgres partial index" --lang en --fresh year
+bin/web/search.go "LadybugDB vector index"
+bin/web/search.go "model2vec multilingual" --category it
+bin/web/search.go "hypervisor" --site example.com --json | jq -r '.results[].url'
+bin/web/search.go "postgres partial index" --lang en --fresh year
 ```
 
+URL and optional Basic Auth live in `$BRAIN_SEARCH_ENV` (default
+`$HOME/.config/brain/search.env`): `BRAIN_SEARCH_URL` is required;
+`BRAIN_SEARCH_USER` / `BRAIN_SEARCH_PASS` only if the instance uses Basic Auth.
+A host that already runs SearXNG should set `BRAIN_SEARCH_URL` and not start
+the Compose profile.
+
 ## Web or knowledge base
 
 `bin/brain/search.go` holds our own facts: the ops stack, portfolio, ssh hosts,
-the lexicon. Go there first. Reach for `bin/web/search` when the answer is
+the lexicon. Go there first. Reach for `bin/web/search.go` when the answer is
 outside our repos: upstream library behaviour, vendor documentation, public
 standards.
 

skills/web-search/reference/instance-tuning.md

@@ -5,63 +5,47 @@ status: current
 
 # Tuning the SearXNG instance
 
-The client works around a fragile instance. These changes fix the cause, and
-they need shell access to the host behind `search.ops.io`
-(`90.169.228.16` / `ops.mywire.org`), which is a different machine from
-the one the agents run on.
+The client treats HTTP 200 + `results: []` as **throttled**, not as absence.
+Fix the cause on the instance you point `BRAIN_SEARCH_URL` at, or use the
+optional Compose profile in this repo.
 
-## Why it is needed
+## Optional Compose profile
 
-Measured on 2026-08-10 from this host:
+Do not start this on a host that already runs SearXNG — set `BRAIN_SEARCH_URL`
+instead (D3).
 
-- The default engine set for the `general` category is only `duckduckgo`,
-  `brave` and `startpage`. `brave` and `startpage` sit in
-  `Suspended: too many requests` or `Suspended: CAPTCHA` almost permanently, so
-  in practice a single engine carries every query.
-- About 25 probe requests over a few minutes pushed `duckduckgo` into `CAPTCHA`
-  as well. The instance then answered HTTP 200 with `results: []` and an empty
-  `unresponsive_engines` - indistinguishable from "nothing found" without the
-  client-side handling we added.
-- Recovery took roughly six minutes.
+```bash
+SEARXNG_SECRET=$(openssl rand -hex 32) docker compose --profile searxng up -d
+```
 
-## Changes
+Pinned image: `docker.io/searxng/searxng:2026.8.10-0a118066d`.
+Settings: `deploy/searxng/settings.yml` + `limiter.toml` (RFC1918 `pass_ip`,
+short `suspended_times`, `formats: [html, json]`). No secrets in git. Bind is
+`127.0.0.1:8888`.
 
-1. **Allow our egress IP through the limiter.** In `limiter.toml`:
+## Why the client classifies empty as throttled
 
-   ```toml
-   [botdetection.ip_lists]
-   pass_ip = ["77.7.46.234"]
-   ```
+A default engine set under load answers HTTP 200 with `results: []` (sometimes
+with empty `unresponsive_engines`). That is indistinguishable from "nothing
+found" unless the client refuses to call it absence.
 
-2. **Shorten the suspensions.** In `settings.yml` the defaults are 24 hours for
-   a CAPTCHA and one hour for too-many-requests, which is far longer than the
-   condition lasts:
+## Instance-side levers
 
-   ```yaml
-   search:
-     suspended_times:
-       SearxEngineCaptcha: 300
-       SearxEngineTooManyRequests: 120
-       SearxEngineAccessDenied: 300
-   ```
-
-3. **Give `general` more than one working engine.** `google` and `wikipedia`
-   report `enabled: true` in `/config` yet never appear in a `general` response,
-   so they are not in the default set. Put them in it; one live engine per
-   category is a single point of failure.
-
-4. **Keep the JSON API on.** `formats: [html, json]` must stay, otherwise every
-   client here breaks.
+1. **Allow the callers through the limiter** (`limiter.toml` `pass_ip`). The
+   Compose file uses RFC1918 only.
+2. **Shorten suspensions** (`settings.yml` `search.suspended_times`) so a
+   CAPTCHA does not last a day.
+3. **More than one engine in `general`.** One live engine is a single point of
+   failure. This repo enables bing, google, duckduckgo, wikipedia.
+4. **Keep the JSON API on.** `formats: [html, json]` must stay.
 
 ## Verifying
 
-Ten requests in a row used to suspend the instance for minutes. After the
-change they should all answer:
-
 ```bash
 for i in $(seq 10); do
-  bin/web/search "test $i" -n 1 --refresh --json | jq -r .status
+  bin/web/search.go "test $i" -n 1 --refresh --json | jq -r .status
 done
 ```
 
-Ten lines of `ok` means it is fixed.
+Ten lines of `ok` means the instance is healthy. Any `throttled` means say
+nothing about whether the subject exists.