add http cache entry limit options

src/Config.zig

@@ -191,6 +191,7 @@ const CommonOptions = .{
     .{ .name = "log_filter_scopes", .type = log.FilterRule, .multiple = true, .validator = logFilterScopesValidator },
     .{ .name = "user_agent_suffix", .type = ?[]const u8 },
     .{ .name = "http_cache_dir", .type = ?[]const u8 },
+    .{ .name = "http_cache_entry_limit", .type = ?u32 },
     .{ .name = "web_bot_auth_key_file", .type = ?[]const u8 },
     .{ .name = "web_bot_auth_keyid", .type = ?[]const u8 },
     .{ .name = "web_bot_auth_domain", .type = ?[]const u8 },
@@ -631,6 +632,13 @@ pub fn httpCacheDir(self: *const Config) ?[]const u8 {
     };
 }
 
+pub fn httpCacheEntryLimit(self: *const Config) u32 {
+    return switch (self.mode) {
+        inline .serve, .fetch, .mcp, .agent => |opts| opts.http_cache_entry_limit orelse 1000,
+        else => 1000,
+    };
+}
+
 pub fn cookieFile(self: *const Config) ?[]const u8 {
     return switch (self.mode) {
         inline .serve, .fetch, .mcp, .agent => |opts| opts.cookie,

src/help.zon

@@ -342,6 +342,9 @@
     \\          Directory used as a filesystem cache for network resources. Omitting
     \\          this disables caching.
     \\          Defaults to no caching.
+    \\  --http-cache-entry-limit <INT>
+    \\          Maximum number of entries that can be stored in the HTTP cache. 0 means no limit.
+    \\          Defaults to 1000.
     \\  --http-connect-timeout <INT>
     \\          Time in ms to establish an HTTP connection before timing out. 0 means
     \\          never.