From 45f87824640f455c49f7b579ae57f4fe20c81c2a Mon Sep 17 00:00:00 2001
From: salvacybersec <salva@opsecti.local>
Date: Mon, 6 Apr 2026 01:15:43 +0300
Subject: [PATCH 1/3] test(10-06): add failing tests for HuggingFaceSource

- httptest server routes /api/spaces and /api/models
- assertions: enabled, both endpoints hit, URL prefixes, auth header, ctx cancel, rate-limit token mode
---
 pkg/recon/sources/huggingface_test.go | 204 ++++++++++++++++++++++++++
 1 file changed, 204 insertions(+)
 create mode 100644 pkg/recon/sources/huggingface_test.go

diff --git a/pkg/recon/sources/huggingface_test.go b/pkg/recon/sources/huggingface_test.go
new file mode 100644
index 0000000..b4a4cfc
--- /dev/null
+++ b/pkg/recon/sources/huggingface_test.go
@@ -0,0 +1,204 @@
+package sources
+
+import (
+	"context"
+	"encoding/json"
+	"fmt"
+	"net/http"
+	"net/http/httptest"
+	"strings"
+	"sync/atomic"
+	"testing"
+	"time"
+
+	"github.com/salvacybersec/keyhunter/pkg/providers"
+	"github.com/salvacybersec/keyhunter/pkg/recon"
+)
+
+// hfTestRegistry builds a minimal registry with two keywords so tests assert
+// an exact Finding count (2 endpoints × 2 keywords × 1 result = 4).
+func hfTestRegistry(t *testing.T) *providers.Registry {
+	t.Helper()
+	return providers.NewRegistryFromProviders([]providers.Provider{
+		{Name: "OpenAI", Keywords: []string{"sk-proj"}},
+		{Name: "Anthropic", Keywords: []string{"sk-ant"}},
+	})
+}
+
+func hfTestServer(t *testing.T, spacesHits, modelsHits *int32, authSeen *string) *httptest.Server {
+	t.Helper()
+	mux := http.NewServeMux()
+	mux.HandleFunc("/api/spaces", func(w http.ResponseWriter, r *http.Request) {
+		atomic.AddInt32(spacesHits, 1)
+		if authSeen != nil {
+			*authSeen = r.Header.Get("Authorization")
+		}
+		q := r.URL.Query().Get("search")
+		payload := []map[string]string{
+			{"id": fmt.Sprintf("acme/space-%s", q)},
+		}
+		w.Header().Set("Content-Type", "application/json")
+		_ = json.NewEncoder(w).Encode(payload)
+	})
+	mux.HandleFunc("/api/models", func(w http.ResponseWriter, r *http.Request) {
+		atomic.AddInt32(modelsHits, 1)
+		q := r.URL.Query().Get("search")
+		payload := []map[string]string{
+			{"id": fmt.Sprintf("acme/model-%s", q)},
+		}
+		w.Header().Set("Content-Type", "application/json")
+		_ = json.NewEncoder(w).Encode(payload)
+	})
+	return httptest.NewServer(mux)
+}
+
+func TestHuggingFaceEnabledAlwaysTrue(t *testing.T) {
+	if !(&HuggingFaceSource{}).Enabled(recon.Config{}) {
+		t.Fatal("HuggingFace should be enabled even without token")
+	}
+	if !(&HuggingFaceSource{Token: "hf_xxx"}).Enabled(recon.Config{}) {
+		t.Fatal("HuggingFace should be enabled with token")
+	}
+}
+
+func TestHuggingFaceSweepHitsBothEndpoints(t *testing.T) {
+	var spacesHits, modelsHits int32
+	ts := hfTestServer(t, &spacesHits, &modelsHits, nil)
+	defer ts.Close()
+
+	reg := hfTestRegistry(t)
+	src := NewHuggingFaceSource(HuggingFaceConfig{
+		Token:    "hf_test",
+		BaseURL:  ts.URL,
+		Registry: reg,
+		Limiters: nil, // bypass rate limiter for tests
+	})
+
+	out := make(chan recon.Finding, 16)
+	ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
+	defer cancel()
+	if err := src.Sweep(ctx, "", out); err != nil {
+		t.Fatalf("Sweep: %v", err)
+	}
+	close(out)
+
+	findings := make([]recon.Finding, 0)
+	for f := range out {
+		findings = append(findings, f)
+	}
+
+	if len(findings) != 4 {
+		t.Fatalf("expected 4 findings, got %d", len(findings))
+	}
+	if atomic.LoadInt32(&spacesHits) != 2 {
+		t.Errorf("expected 2 /api/spaces hits, got %d", spacesHits)
+	}
+	if atomic.LoadInt32(&modelsHits) != 2 {
+		t.Errorf("expected 2 /api/models hits, got %d", modelsHits)
+	}
+
+	var sawSpace, sawModel bool
+	for _, f := range findings {
+		if f.SourceType != "recon:huggingface" {
+			t.Errorf("wrong SourceType: %q", f.SourceType)
+		}
+		switch {
+		case strings.HasPrefix(f.Source, "https://huggingface.co/spaces/"):
+			sawSpace = true
+		case strings.HasPrefix(f.Source, "https://huggingface.co/"):
+			sawModel = true
+		default:
+			t.Errorf("unexpected Source URL: %q", f.Source)
+		}
+	}
+	if !sawSpace || !sawModel {
+		t.Errorf("expected both space and model URLs; space=%v model=%v", sawSpace, sawModel)
+	}
+}
+
+func TestHuggingFaceAuthorizationHeader(t *testing.T) {
+	var authSeen string
+	var s, m int32
+	ts := hfTestServer(t, &s, &m, &authSeen)
+	defer ts.Close()
+
+	reg := hfTestRegistry(t)
+	src := NewHuggingFaceSource(HuggingFaceConfig{
+		Token:    "hf_secret",
+		BaseURL:  ts.URL,
+		Registry: reg,
+		Limiters: nil,
+	})
+	out := make(chan recon.Finding, 16)
+	ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
+	defer cancel()
+	if err := src.Sweep(ctx, "", out); err != nil {
+		t.Fatalf("Sweep: %v", err)
+	}
+	close(out)
+	for range out {
+	}
+	if authSeen != "Bearer hf_secret" {
+		t.Errorf("expected 'Bearer hf_secret', got %q", authSeen)
+	}
+
+	// Without token
+	authSeen = ""
+	var s2, m2 int32
+	ts2 := hfTestServer(t, &s2, &m2, &authSeen)
+	defer ts2.Close()
+	src2 := NewHuggingFaceSource(HuggingFaceConfig{
+		BaseURL:  ts2.URL,
+		Registry: reg,
+		Limiters: nil,
+	})
+	out2 := make(chan recon.Finding, 16)
+	if err := src2.Sweep(ctx, "", out2); err != nil {
+		t.Fatalf("Sweep unauth: %v", err)
+	}
+	close(out2)
+	for range out2 {
+	}
+	if authSeen != "" {
+		t.Errorf("expected no Authorization header when token empty, got %q", authSeen)
+	}
+}
+
+func TestHuggingFaceContextCancellation(t *testing.T) {
+	ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		select {
+		case <-r.Context().Done():
+			return
+		case <-time.After(2 * time.Second):
+			w.WriteHeader(http.StatusOK)
+			_, _ = w.Write([]byte("[]"))
+		}
+	}))
+	defer ts.Close()
+
+	reg := hfTestRegistry(t)
+	src := NewHuggingFaceSource(HuggingFaceConfig{
+		BaseURL:  ts.URL,
+		Registry: reg,
+		Limiters: nil,
+	})
+
+	ctx, cancel := context.WithTimeout(context.Background(), 100*time.Millisecond)
+	defer cancel()
+	out := make(chan recon.Finding, 16)
+	if err := src.Sweep(ctx, "", out); err == nil {
+		t.Fatal("expected error on cancelled context")
+	}
+}
+
+func TestHuggingFaceRateLimitTokenMode(t *testing.T) {
+	withTok := &HuggingFaceSource{Token: "hf_xxx"}
+	noTok := &HuggingFaceSource{}
+	if withTok.RateLimit() == noTok.RateLimit() {
+		t.Fatal("rate limit should differ based on token presence")
+	}
+	if withTok.RateLimit() < noTok.RateLimit() {
+		t.Fatalf("authenticated rate (%v) should be faster (larger) than unauth (%v)",
+			withTok.RateLimit(), noTok.RateLimit())
+	}
+}

From 39001f208c51fa5e420b2151adcc254d8263c29f Mon Sep 17 00:00:00 2001
From: salvacybersec <salva@opsecti.local>
Date: Mon, 6 Apr 2026 01:15:49 +0300
Subject: [PATCH 2/3] feat(10-06): implement HuggingFaceSource scanning Spaces
 and Models

- queries /api/spaces and /api/models via Hub API
- token optional: slower rate when absent (10s vs 3.6s)
- emits Findings with SourceType=recon:huggingface and prefixed Source URLs
- compile-time assert implements recon.ReconSource
---
 pkg/recon/sources/huggingface.go | 181 +++++++++++++++++++++++++++++++
 1 file changed, 181 insertions(+)
 create mode 100644 pkg/recon/sources/huggingface.go

diff --git a/pkg/recon/sources/huggingface.go b/pkg/recon/sources/huggingface.go
new file mode 100644
index 0000000..0d1c11f
--- /dev/null
+++ b/pkg/recon/sources/huggingface.go
@@ -0,0 +1,181 @@
+package sources
+
+import (
+	"context"
+	"encoding/json"
+	"fmt"
+	"net/http"
+	"net/url"
+	"time"
+
+	"golang.org/x/time/rate"
+
+	"github.com/salvacybersec/keyhunter/pkg/providers"
+	"github.com/salvacybersec/keyhunter/pkg/recon"
+)
+
+// defaultHuggingFaceBaseURL is the public HF Hub API root.
+const defaultHuggingFaceBaseURL = "https://huggingface.co"
+
+// HuggingFaceConfig configures a HuggingFaceSource.
+type HuggingFaceConfig struct {
+	// Token is the Hugging Face access token. Optional — anonymous requests
+	// are accepted but rate-limited more aggressively.
+	Token string
+	// BaseURL overrides the API root for tests. Defaults to
+	// https://huggingface.co when empty.
+	BaseURL string
+	// Registry drives keyword generation via BuildQueries.
+	Registry *providers.Registry
+	// Limiters is the shared per-source limiter registry.
+	Limiters *recon.LimiterRegistry
+}
+
+// HuggingFaceSource implements recon.ReconSource against the Hugging Face Hub
+// API, sweeping both Spaces and model repositories for provider keywords.
+//
+// RECON-CODE-08: token optional; when empty the source still runs but applies
+// a slower RateLimit to stay within anonymous quotas.
+type HuggingFaceSource struct {
+	Token    string
+	BaseURL  string
+	Registry *providers.Registry
+	Limiters *recon.LimiterRegistry
+
+	client *Client
+}
+
+// NewHuggingFaceSource constructs a HuggingFaceSource with sensible defaults.
+func NewHuggingFaceSource(cfg HuggingFaceConfig) *HuggingFaceSource {
+	base := cfg.BaseURL
+	if base == "" {
+		base = defaultHuggingFaceBaseURL
+	}
+	return &HuggingFaceSource{
+		Token:    cfg.Token,
+		BaseURL:  base,
+		Registry: cfg.Registry,
+		Limiters: cfg.Limiters,
+		client:   NewClient(),
+	}
+}
+
+// Name returns the stable source identifier.
+func (s *HuggingFaceSource) Name() string { return "huggingface" }
+
+// RateLimit returns the per-source token bucket rate. Authenticated requests
+// get ~1000/hour (one every 3.6s); unauthenticated requests are throttled to
+// one every 10 seconds to stay conservative against the public quota.
+func (s *HuggingFaceSource) RateLimit() rate.Limit {
+	if s.Token != "" {
+		return rate.Every(3600 * time.Millisecond)
+	}
+	return rate.Every(10 * time.Second)
+}
+
+// Burst returns the limiter burst capacity.
+func (s *HuggingFaceSource) Burst() int { return 1 }
+
+// RespectsRobots reports whether this source should honor robots.txt.
+// The Hub API is a JSON endpoint, so robots.txt does not apply.
+func (s *HuggingFaceSource) RespectsRobots() bool { return false }
+
+// Enabled reports whether this source should run. HuggingFace runs even
+// without a token — anonymous requests are permitted at a lower rate limit.
+func (s *HuggingFaceSource) Enabled(_ recon.Config) bool { return true }
+
+// hfItem is the minimal shape returned by /api/spaces and /api/models list
+// endpoints. Both expose an `id` of the form "owner/name".
+type hfItem struct {
+	ID string `json:"id"`
+}
+
+// Sweep iterates provider keywords and queries both the Spaces and Models
+// search endpoints, emitting one Finding per result.
+func (s *HuggingFaceSource) Sweep(ctx context.Context, _ string, out chan<- recon.Finding) error {
+	if s.client == nil {
+		s.client = NewClient()
+	}
+	base := s.BaseURL
+	if base == "" {
+		base = defaultHuggingFaceBaseURL
+	}
+
+	queries := BuildQueries(s.Registry, s.Name())
+	if len(queries) == 0 {
+		return nil
+	}
+
+	endpoints := []struct {
+		path      string
+		urlPrefix string // prefix applied to item.ID to form Finding.Source
+	}{
+		{"/api/spaces", "https://huggingface.co/spaces/"},
+		{"/api/models", "https://huggingface.co/"},
+	}
+
+	for _, q := range queries {
+		for _, ep := range endpoints {
+			if err := ctx.Err(); err != nil {
+				return err
+			}
+			if err := s.sweepEndpoint(ctx, base, ep.path, ep.urlPrefix, q, out); err != nil {
+				return err
+			}
+		}
+	}
+	return nil
+}
+
+func (s *HuggingFaceSource) sweepEndpoint(
+	ctx context.Context,
+	base, path, urlPrefix, query string,
+	out chan<- recon.Finding,
+) error {
+	if s.Limiters != nil {
+		if err := s.Limiters.Wait(ctx, s.Name(), s.RateLimit(), s.Burst(), false); err != nil {
+			return err
+		}
+	}
+
+	u := fmt.Sprintf("%s%s?search=%s&limit=50", base, path, url.QueryEscape(query))
+	req, err := http.NewRequestWithContext(ctx, http.MethodGet, u, nil)
+	if err != nil {
+		return fmt.Errorf("huggingface: build request: %w", err)
+	}
+	req.Header.Set("Accept", "application/json")
+	if s.Token != "" {
+		req.Header.Set("Authorization", "Bearer "+s.Token)
+	}
+
+	resp, err := s.client.Do(ctx, req)
+	if err != nil {
+		return fmt.Errorf("huggingface %s: %w", path, err)
+	}
+	defer resp.Body.Close()
+
+	var items []hfItem
+	if err := json.NewDecoder(resp.Body).Decode(&items); err != nil {
+		return fmt.Errorf("huggingface %s: decode: %w", path, err)
+	}
+
+	for _, item := range items {
+		if item.ID == "" {
+			continue
+		}
+		finding := recon.Finding{
+			Source:     urlPrefix + item.ID,
+			SourceType: "recon:huggingface",
+			DetectedAt: time.Now().UTC(),
+		}
+		select {
+		case out <- finding:
+		case <-ctx.Done():
+			return ctx.Err()
+		}
+	}
+	return nil
+}
+
+// Compile-time assertion that HuggingFaceSource satisfies recon.ReconSource.
+var _ recon.ReconSource = (*HuggingFaceSource)(nil)

From cae714b4887336af12643d1e7ddec36bd40a74c5 Mon Sep 17 00:00:00 2001
From: salvacybersec <salva@opsecti.local>
Date: Mon, 6 Apr 2026 01:16:27 +0300
Subject: [PATCH 3/3] docs(10-06): complete HuggingFaceSource plan

---
 .../10-osint-code-hosting/10-06-SUMMARY.md    | 79 +++++++++++++++++++
 1 file changed, 79 insertions(+)
 create mode 100644 .planning/phases/10-osint-code-hosting/10-06-SUMMARY.md

diff --git a/.planning/phases/10-osint-code-hosting/10-06-SUMMARY.md b/.planning/phases/10-osint-code-hosting/10-06-SUMMARY.md
new file mode 100644
index 0000000..a645a23
--- /dev/null
+++ b/.planning/phases/10-osint-code-hosting/10-06-SUMMARY.md
@@ -0,0 +1,79 @@
+---
+phase: 10-osint-code-hosting
+plan: 06
+subsystem: recon/sources
+tags: [recon, osint, huggingface, wave-2]
+requires:
+  - pkg/recon/sources.Client (Plan 10-01)
+  - pkg/recon/sources.BuildQueries (Plan 10-01)
+  - pkg/recon.LimiterRegistry
+  - pkg/providers.Registry
+provides:
+  - pkg/recon/sources.HuggingFaceSource
+  - pkg/recon/sources.HuggingFaceConfig
+  - pkg/recon/sources.NewHuggingFaceSource
+affects:
+  - pkg/recon/sources
+tech_stack_added: []
+patterns:
+  - "Optional-token sources return Enabled=true and degrade RateLimit when credentials absent"
+  - "Multi-endpoint sweep: iterate queries × endpoints, mapping each to a URL-prefix"
+  - "Context cancellation checked between endpoint calls and when sending to out channel"
+key_files_created:
+  - pkg/recon/sources/huggingface.go
+  - pkg/recon/sources/huggingface_test.go
+key_files_modified: []
+decisions:
+  - "Unauthenticated rate of rate.Every(10s) chosen conservatively vs the ~300/hour anonymous quota to avoid 429s"
+  - "Tests pass Limiters=nil to keep wall-clock fast; rate-limit behavior covered separately by TestHuggingFaceRateLimitTokenMode"
+  - "Finding.Source uses the canonical public URL (not the API URL) so downstream deduplication matches human-visible links"
+metrics:
+  duration: "~8 minutes"
+  completed: "2026-04-05"
+  tasks: 1
+  files: 2
+---
+
+# Phase 10 Plan 06: HuggingFaceSource Summary
+
+Implements `HuggingFaceSource` against the Hugging Face Hub API, sweeping both `/api/spaces` and `/api/models` for every provider keyword and emitting recon Findings with canonical huggingface.co URLs.
+
+## What Changed
+
+- New `HuggingFaceSource` implementing `recon.ReconSource` with optional `Token`.
+- Per-endpoint sweep loop: for each keyword from `BuildQueries(registry, "huggingface")`, hit `/api/spaces?search=...&limit=50` then `/api/models?search=...&limit=50`.
+- URL normalization: space results mapped to `https://huggingface.co/spaces/{id}`, model results to `https://huggingface.co/{id}`.
+- Rate limit is token-aware: `rate.Every(3600ms)` when authenticated (matches 1000/hour), `rate.Every(10s)` otherwise.
+- Authorization header only set when `Token != ""`.
+- Compile-time assertion `var _ recon.ReconSource = (*HuggingFaceSource)(nil)`.
+
+## Test Coverage
+
+All six TDD assertions in `huggingface_test.go` pass:
+
+1. `TestHuggingFaceEnabledAlwaysTrue` — enabled with and without token.
+2. `TestHuggingFaceSweepHitsBothEndpoints` — exact Finding count (2 keywords × 2 endpoints = 4), both URL prefixes observed, `SourceType="recon:huggingface"`.
+3. `TestHuggingFaceAuthorizationHeader` — `Bearer hf_secret` sent when token set, header absent when empty.
+4. `TestHuggingFaceContextCancellation` — slow server + 100ms context returns error promptly.
+5. `TestHuggingFaceRateLimitTokenMode` — authenticated rate is strictly faster than unauthenticated rate.
+
+Plus httptest server shared by auth + endpoint tests (`hfTestServer`).
+
+## Deviations from Plan
+
+None — plan executed exactly as written. One minor test refinement: tests pass `Limiters: nil` instead of constructing a real `LimiterRegistry`, because the production RateLimit of `rate.Every(3600ms)` with burst 1 would make four serialized waits exceed a reasonable test budget. The limiter code path is still exercised in production and the rate-mode contract is covered by `TestHuggingFaceRateLimitTokenMode`.
+
+## Commits
+
+- `45f8782` test(10-06): add failing tests for HuggingFaceSource
+- `39001f2` feat(10-06): implement HuggingFaceSource scanning Spaces and Models
+
+## Self-Check: PASSED
+
+- FOUND: pkg/recon/sources/huggingface.go
+- FOUND: pkg/recon/sources/huggingface_test.go
+- FOUND: commit 45f8782
+- FOUND: commit 39001f2
+- `go test ./pkg/recon/sources/ -run TestHuggingFace -v` — PASS (5/5)
+- `go build ./...` — PASS
+- `go test ./pkg/recon/...` — PASS