Add cooldown package pattern overrides

config.example.yaml

@@ -332,6 +332,10 @@ cooldown:
   #   "pkg:npm/lodash": "0"
   #   "pkg:npm/@babel/core": "14d"
 
+  # Per-package glob overrides, after exact packages and before ecosystems.
+  # package_patterns:
+  #   "pkg:npm/@example/*": "0"
+
 # Exact versions to deny, independently of cooldown and scanning.
 # Metadata filtering: npm, PyPI and Cargo. Shared artifact downloads, including
 # cache hits, are blocked with 403; signed APT metadata is left unchanged.

docs/configuration.md

@@ -458,19 +458,26 @@ cooldown:
   packages:
     "pkg:npm/lodash": "0"
     "pkg:npm/@babel/core": "14d"
+  package_patterns:
+    "pkg:npm/@example/*": "0"
 ```
 
 | Config | Environment | Description |
 |--------|-------------|-------------|
 | `cooldown.default` | `PROXY_COOLDOWN_DEFAULT` | Global default cooldown |
 | `cooldown.ecosystems` | - | Per-ecosystem overrides |
 | `cooldown.packages` | - | Per-package overrides (keyed by PURL) |
+| `cooldown.package_patterns` | - | Per-package glob overrides (keyed by PURL glob) |
 
 Durations support days (`7d`), hours (`48h`), and minutes (`30m`). Set to `0` to disable.
 
 Package PURL keys are normalized to canonical form before matching, so `pkg:npm/@babel/core` and `pkg:npm/%40babel/core` are equivalent, as are `pkg:pypi/Django` and `pkg:pypi/django`. If both forms configure the same package, the canonical entry wins.
 
-Resolution order: package override, then ecosystem override, then global default. This lets you set a conservative default while exempting trusted packages.
+`package_patterns` matches canonical, versionless PURLs using `*` for zero or more characters and `?` for one character. Neither wildcard crosses `/` separators. Character classes (`[...]`) and backslash escapes are rejected at startup. For example, `"pkg:npm/@example/*"` matches packages under the `@example` npm scope. Patterns accept `@` as an alias for `%40`; other characters must use their canonical PURL form. Equivalent patterns with different durations are rejected at startup. Equal durations, such as `1d` and `24h`, are accepted.
+
+Exact `packages` entries take precedence over patterns. When several patterns match, longer patterns win after excluding `*` and `?` from the length. Ties use lexical order of the normalized patterns.
+
+Resolution order: exact package override, then package pattern, then ecosystem override, then global default. This lets you set a conservative default while exempting trusted package families.
 
 Currently supported for npm, PyPI, pub.dev, Composer, Cargo, NuGet, Conda, RubyGems, and Hex. These ecosystems include publish timestamps in their metadata.
 

internal/config/config.go

@@ -192,6 +192,10 @@ type CooldownConfig struct {
 	// Packages overrides the cooldown for specific packages (keyed by PURL).
 	// Valid PURL keys are normalized to canonical form before use.
 	Packages map[string]string `json:"packages" yaml:"packages"`
+
+	// PackagePatterns overrides the cooldown for packages whose PURLs match a glob.
+	// Exact package overrides take precedence over matching patterns.
+	PackagePatterns map[string]string `json:"package_patterns" yaml:"package_patterns"`
 }
 
 // NormalizedPackages returns a copy of the package overrides with valid PURL

internal/config/config_test.go

@@ -562,6 +562,8 @@ cooldown:
   packages:
     "pkg:npm/lodash": "0"
     "pkg:npm/@babel/core": "14d"
+  package_patterns:
+    "pkg:npm/@example/*": "0"
 `
 	if err := os.WriteFile(path, []byte(content), 0644); err != nil {
 		t.Fatalf("writing config file: %v", err)
@@ -590,6 +592,9 @@ cooldown:
 	if got := cfg.Cooldown.NormalizedPackages()["pkg:npm/%40babel/core"]; got != "14d" {
 		t.Errorf("normalized Cooldown.Packages[@babel/core] = %q, want %q", got, "14d")
 	}
+	if cfg.Cooldown.PackagePatterns["pkg:npm/@example/*"] != "0" {
+		t.Errorf("Cooldown.PackagePatterns[example] = %q, want %q", cfg.Cooldown.PackagePatterns["pkg:npm/@example/*"], "0")
+	}
 }
 
 func TestCooldownConfigNormalizedPackages(t *testing.T) {

internal/cooldownpolicy/policy.go

@@ -0,0 +1,114 @@
+// Package cooldownpolicy applies package-pattern overrides to cooldown checks.
+package cooldownpolicy
+
+import (
+	"fmt"
+	"path"
+	"sort"
+	"strings"
+	"time"
+
+	"github.com/git-pkgs/cooldown"
+)
+
+// Policy applies exact PURL overrides before package-pattern overrides.
+type Policy struct {
+	base     *cooldown.Config
+	patterns []pattern
+	enabled  bool
+}
+
+type pattern struct {
+	glob     string
+	duration time.Duration
+	config   *cooldown.Config
+}
+
+// New creates a Policy using the supplied exact and pattern overrides.
+func New(base *cooldown.Config, packagePatterns map[string]string) (*Policy, error) {
+	if base == nil {
+		base = &cooldown.Config{}
+	}
+
+	keys := make([]string, 0, len(packagePatterns))
+	for glob := range packagePatterns {
+		keys = append(keys, glob)
+	}
+	sort.Strings(keys)
+	patterns := make([]pattern, 0, len(packagePatterns))
+	seen := make(map[string]pattern)
+	enabled := base.Enabled()
+	for _, glob := range keys {
+		value := packagePatterns[glob]
+		if strings.ContainsAny(glob, "[\\") {
+			return nil, fmt.Errorf("invalid cooldown package pattern %q: character classes and escapes are not supported", glob)
+		}
+		canonicalGlob := strings.ReplaceAll(glob, "@", "%40")
+		if _, err := path.Match(canonicalGlob, ""); err != nil {
+			return nil, fmt.Errorf("invalid cooldown package pattern %q: %w", glob, err)
+		}
+		duration, err := cooldown.ParseDuration(value)
+		if err != nil {
+			return nil, fmt.Errorf("invalid cooldown duration for package pattern %q: %w", glob, err)
+		}
+		if previous, exists := seen[canonicalGlob]; exists {
+			if previous.duration != duration {
+				return nil, fmt.Errorf("conflicting cooldown package patterns %q and %q", previous.glob, glob)
+			}
+			continue
+		}
+		seen[canonicalGlob] = pattern{glob: glob, duration: duration}
+		config := &cooldown.Config{Default: value}
+		enabled = config.Enabled() || enabled
+		patterns = append(patterns, pattern{glob: canonicalGlob, duration: duration, config: config})
+	}
+	sort.Slice(patterns, func(i, j int) bool {
+		left, right := literalLength(patterns[i].glob), literalLength(patterns[j].glob)
+		if left != right {
+			return left > right
+		}
+		return patterns[i].glob < patterns[j].glob
+	})
+
+	return &Policy{base: base, patterns: patterns, enabled: enabled}, nil
+}
+
+func literalLength(glob string) int {
+	return len(glob) - strings.Count(glob, "*") - strings.Count(glob, "?")
+}
+
+// For returns the duration, with exact overrides taking precedence over patterns.
+func (p *Policy) For(ecosystem, packagePURL string) time.Duration {
+	return p.configFor(packagePURL).For(ecosystem, packagePURL)
+}
+
+func (p *Policy) configFor(packagePURL string) *cooldown.Config {
+	if _, exact := p.base.Packages[packagePURL]; exact {
+		return p.base
+	}
+
+	for _, candidate := range p.patterns {
+		matched, _ := path.Match(candidate.glob, packagePURL)
+		if !matched {
+			continue
+		}
+		return candidate.config
+	}
+
+	return p.base
+}
+
+// IsAllowed reports whether the package version has completed its cooldown.
+func (p *Policy) IsAllowed(ecosystem, packagePURL string, publishedAt time.Time) bool {
+	return p.Evaluate(ecosystem, packagePURL, publishedAt, time.Now()).Allowed
+}
+
+// Evaluate returns the cooldown decision at the supplied evaluation time.
+func (p *Policy) Evaluate(ecosystem, packagePURL string, publishedAt, evaluatedAt time.Time) cooldown.Decision {
+	return p.configFor(packagePURL).Evaluate(ecosystem, packagePURL, publishedAt, evaluatedAt)
+}
+
+// Enabled reports whether any configured cooldown can filter a package version.
+func (p *Policy) Enabled() bool {
+	return p.enabled
+}