[BUG] Session halts after receiving 400 API error (Output blocked by content filtering policy)

Just noticed this looks similar to #6772.

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I have a similar problem. I have, using Go, a country package with a map with all country names. Now I try to move that package to a shared repository and update all references/ add some other functions but Claude refuses with API Error: 400 {"type":"error","error":{"type":"invalid_request_error","message":"Output blocked by content filtering policy"},"request_id":null}. Strange thing is, the list of countries was earlier generated by Claude itself.

I am using Claude Code version 2.0.76 (Claude Code)

package country

type Country struct {
	Code string `json:"code"`
	Name string `json:"name"`
}

// Exists checks if a country code is valid.
func Exists(code string) bool {
	for _, c := range ListCountries() {
		if c.Code == code {
			return true
		}
	}
	return false
}

func ListCountries() []Country {
	return []Country{
		{Code: "AF", Name: "Afghanistan"},
		{Code: "AX", Name: "Åland Islands"},
		{Code: "AL", Name: "Albania"},
		{Code: "DZ", Name: "Algeria"},
		{Code: "AS", Name: "American Samoa"},
		{Code: "AD", Name: "Andorra"},
		{Code: "AO", Name: "Angola"},
		{Code: "AI", Name: "Anguilla"},
		{Code: "AQ", Name: "Antarctica"},
		{Code: "AG", Name: "Antigua and Barbuda"},
		{Code: "AR", Name: "Argentina"},
		{Code: "AM", Name: "Armenia"},
		{Code: "AW", Name: "Aruba"},
		{Code: "AU", Name: "Australia"},
		{Code: "AT", Name: "Austria"},
		{Code: "AZ", Name: "Azerbaijan"},
		{Code: "BS", Name: "Bahamas"},
		{Code: "BH", Name: "Bahrain"},
		{Code: "BD", Name: "Bangladesh"},
		{Code: "BB", Name: "Barbados"},
		{Code: "BY", Name: "Belarus"},
		{Code: "BE", Name: "Belgium"},
		{Code: "BZ", Name: "Belize"},
		{Code: "BJ", Name: "Benin"},
		{Code: "BM", Name: "Bermuda"},
		{Code: "BT", Name: "Bhutan"},
		{Code: "BO", Name: "Bolivia (Plurinational State of)"},
		{Code: "BQ", Name: "Bonaire, Sint Eustatius and Saba"},
		{Code: "BA", Name: "Bosnia and Herzegovina"},
		{Code: "BW", Name: "Botswana"},
		{Code: "BV", Name: "Bouvet Island"},
		{Code: "BR", Name: "Brazil"},
		{Code: "IO", Name: "British Indian Ocean Territory"},
		{Code: "BN", Name: "Brunei Darussalam"},
		{Code: "BG", Name: "Bulgaria"},
		{Code: "BF", Name: "Burkina Faso"},
		{Code: "BI", Name: "Burundi"},
		{Code: "CV", Name: "Cabo Verde"},
		{Code: "KH", Name: "Cambodia"},
		{Code: "CM", Name: "Cameroon"},
		{Code: "CA", Name: "Canada"},
		{Code: "KY", Name: "Cayman Islands"},
		{Code: "CF", Name: "Central African Republic"},
		{Code: "TD", Name: "Chad"},
		{Code: "CL", Name: "Chile"},
		{Code: "CN", Name: "China"},
		{Code: "CX", Name: "Christmas Island"},
		{Code: "CC", Name: "Cocos (Keeling) Islands"},
		{Code: "CO", Name: "Colombia"},
		{Code: "KM", Name: "Comoros"},
		{Code: "CG", Name: "Congo"},
		{Code: "CD", Name: "Congo (Democratic Republic of the)"},
		{Code: "CK", Name: "Cook Islands"},
		{Code: "CR", Name: "Costa Rica"},
		{Code: "CI", Name: "Côte d'Ivoire"},
		{Code: "HR", Name: "Croatia"},
		{Code: "CU", Name: "Cuba"},
		{Code: "CW", Name: "Curaçao"},
		{Code: "CY", Name: "Cyprus"},
		{Code: "CZ", Name: "Czechia"},
		{Code: "DK", Name: "Denmark"},
		{Code: "DJ", Name: "Djibouti"},
		{Code: "DM", Name: "Dominica"},
		{Code: "DO", Name: "Dominican Republic"},
		{Code: "EC", Name: "Ecuador"},
		{Code: "EG", Name: "Egypt"},
		{Code: "SV", Name: "El Salvador"},
		{Code: "GQ", Name: "Equatorial Guinea"},
		{Code: "ER", Name: "Eritrea"},
		{Code: "EE", Name: "Estonia"},
		{Code: "SZ", Name: "Eswatini"},
		{Code: "ET", Name: "Ethiopia"},
		{Code: "FK", Name: "Falkland Islands (Malvinas)"},
		{Code: "FO", Name: "Faroe Islands"},
		{Code: "FJ", Name: "Fiji"},
		{Code: "FI", Name: "Finland"},
		{Code: "FR", Name: "France"},
		{Code: "GF", Name: "French Guiana"},
		{Code: "PF", Name: "French Polynesia"},
		{Code: "TF", Name: "French Southern Territories"},
		{Code: "GA", Name: "Gabon"},
		{Code: "GM", Name: "Gambia"},
		{Code: "GE", Name: "Georgia"},
		{Code: "DE", Name: "Germany"},
		{Code: "GH", Name: "Ghana"},
		{Code: "GI", Name: "Gibraltar"},
		{Code: "GR", Name: "Greece"},
		{Code: "GL", Name: "Greenland"},
		{Code: "GD", Name: "Grenada"},
		{Code: "GP", Name: "Guadeloupe"},
		{Code: "GU", Name: "Guam"},
		{Code: "GT", Name: "Guatemala"},
		{Code: "GG", Name: "Guernsey"},
		{Code: "GN", Name: "Guinea"},
		{Code: "GW", Name: "Guinea-Bissau"},
		{Code: "GY", Name: "Guyana"},
		{Code: "HT", Name: "Haiti"},
		{Code: "HM", Name: "Heard Island and McDonald Islands"},
		{Code: "VA", Name: "Holy See"},
		{Code: "HN", Name: "Honduras"},
		{Code: "HK", Name: "Hong Kong"},
		{Code: "HU", Name: "Hungary"},
		{Code: "IS", Name: "Iceland"},
		{Code: "IN", Name: "India"},
		{Code: "ID", Name: "Indonesia"},
		{Code: "IR", Name: "Iran (Islamic Republic of)"},
		{Code: "IQ", Name: "Iraq"},
		{Code: "IE", Name: "Ireland"},
		{Code: "IM", Name: "Isle of Man"},
		{Code: "IL", Name: "Israel"},
		{Code: "IT", Name: "Italy"},
		{Code: "JM", Name: "Jamaica"},
		{Code: "JP", Name: "Japan"},
		{Code: "JE", Name: "Jersey"},
		{Code: "JO", Name: "Jordan"},
		{Code: "KZ", Name: "Kazakhstan"},
		{Code: "KE", Name: "Kenya"},
		{Code: "KI", Name: "Kiribati"},
		{Code: "KP", Name: "Korea (Democratic People's Republic of)"},
		{Code: "KR", Name: "Korea (Republic of)"},
		{Code: "KW", Name: "Kuwait"},
		{Code: "KG", Name: "Kyrgyzstan"},
		{Code: "LA", Name: "Lao People's Democratic Republic"},
		{Code: "LV", Name: "Latvia"},
		{Code: "LB", Name: "Lebanon"},
		{Code: "LS", Name: "Lesotho"},
		{Code: "LR", Name: "Liberia"},
		{Code: "LY", Name: "Libya"},
		{Code: "LI", Name: "Liechtenstein"},
		{Code: "LT", Name: "Lithuania"},
		{Code: "LU", Name: "Luxembourg"},
		{Code: "MO", Name: "Macao"},
		{Code: "MG", Name: "Madagascar"},
		{Code: "MW", Name: "Malawi"},
		{Code: "MY", Name: "Malaysia"},
		{Code: "MV", Name: "Maldives"},
		{Code: "ML", Name: "Mali"},
		{Code: "MT", Name: "Malta"},
		{Code: "MH", Name: "Marshall Islands"},
		{Code: "MQ", Name: "Martinique"},
		{Code: "MR", Name: "Mauritania"},
		{Code: "MU", Name: "Mauritius"},
		{Code: "YT", Name: "Mayotte"},
		{Code: "MX", Name: "Mexico"},
		{Code: "FM", Name: "Micronesia (Federated States of)"},
		{Code: "MD", Name: "Moldova (Republic of)"},
		{Code: "MC", Name: "Monaco"},
		{Code: "MN", Name: "Mongolia"},
		{Code: "ME", Name: "Montenegro"},
		{Code: "MS", Name: "Montserrat"},
		{Code: "MA", Name: "Morocco"},
		{Code: "MZ", Name: "Mozambique"},
		{Code: "MM", Name: "Myanmar"},
		{Code: "NA", Name: "Namibia"},
		{Code: "NR", Name: "Nauru"},
		{Code: "NP", Name: "Nepal"},
		{Code: "NL", Name: "Netherlands"},
		{Code: "NC", Name: "New Caledonia"},
		{Code: "NZ", Name: "New Zealand"},
		{Code: "NI", Name: "Nicaragua"},
		{Code: "NE", Name: "Niger"},
		{Code: "NG", Name: "Nigeria"},
		{Code: "NU", Name: "Niue"},
		{Code: "NF", Name: "Norfolk Island"},
		{Code: "MK", Name: "North Macedonia"},
		{Code: "MP", Name: "Northern Mariana Islands"},
		{Code: "NO", Name: "Norway"},
		{Code: "OM", Name: "Oman"},
		{Code: "PK", Name: "Pakistan"},
		{Code: "PW", Name: "Palau"},
		{Code: "PS", Name: "Palestine, State of"},
		{Code: "PA", Name: "Panama"},
		{Code: "PG", Name: "Papua New Guinea"},
		{Code: "PY", Name: "Paraguay"},
		{Code: "PE", Name: "Peru"},
		{Code: "PH", Name: "Philippines"},
		{Code: "PN", Name: "Pitcairn"},
		{Code: "PL", Name: "Poland"},
		{Code: "PT", Name: "Portugal"},
		{Code: "PR", Name: "Puerto Rico"},
		{Code: "QA", Name: "Qatar"},
		{Code: "RE", Name: "Réunion"},
		{Code: "RO", Name: "Romania"},
		{Code: "RU", Name: "Russian Federation"},
		{Code: "RW", Name: "Rwanda"},
		{Code: "BL", Name: "Saint Barthélemy"},
		{Code: "SH", Name: "Saint Helena, Ascension and Tristan da Cunha"},
		{Code: "KN", Name: "Saint Kitts and Nevis"},
		{Code: "LC", Name: "Saint Lucia"},
		{Code: "MF", Name: "Saint Martin (French part)"},
		{Code: "PM", Name: "Saint Pierre and Miquelon"},
		{Code: "VC", Name: "Saint Vincent and the Grenadines"},
		{Code: "WS", Name: "Samoa"},
		{Code: "SM", Name: "San Marino"},
		{Code: "ST", Name: "Sao Tome and Principe"},
		{Code: "SA", Name: "Saudi Arabia"},
		{Code: "SN", Name: "Senegal"},
		{Code: "RS", Name: "Serbia"},
		{Code: "SC", Name: "Seychelles"},
		{Code: "SL", Name: "Sierra Leone"},
		{Code: "SG", Name: "Singapore"},
		{Code: "SX", Name: "Sint Maarten (Dutch part)"},
		{Code: "SK", Name: "Slovakia"},
		{Code: "SI", Name: "Slovenia"},
		{Code: "SB", Name: "Solomon Islands"},
		{Code: "SO", Name: "Somalia"},
		{Code: "ZA", Name: "South Africa"},
		{Code: "GS", Name: "South Georgia and the South Sandwich Islands"},
		{Code: "SS", Name: "South Sudan"},
		{Code: "ES", Name: "Spain"},
		{Code: "LK", Name: "Sri Lanka"},
		{Code: "SD", Name: "Sudan"},
		{Code: "SR", Name: "Suriname"},
		{Code: "SJ", Name: "Svalbard and Jan Mayen"},
		{Code: "SE", Name: "Sweden"},
		{Code: "CH", Name: "Switzerland"},
		{Code: "SY", Name: "Syrian Arab Republic"},
		{Code: "TW", Name: "Taiwan, Province of China"},
		{Code: "TJ", Name: "Tajikistan"},
		{Code: "TZ", Name: "Tanzania, United Republic of"},
		{Code: "TH", Name: "Thailand"},
		{Code: "TL", Name: "Timor-Leste"},
		{Code: "TG", Name: "Togo"},
		{Code: "TK", Name: "Tokelau"},
		{Code: "TO", Name: "Tonga"},
		{Code: "TT", Name: "Trinidad and Tobago"},
		{Code: "TN", Name: "Tunisia"},
		{Code: "TR", Name: "Türkiye"},
		{Code: "TM", Name: "Turkmenistan"},
		{Code: "TC", Name: "Turks and Caicos Islands"},
		{Code: "TV", Name: "Tuvalu"},
		{Code: "UG", Name: "Uganda"},
		{Code: "UA", Name: "Ukraine"},
		{Code: "AE", Name: "United Arab Emirates"},
		{Code: "GB", Name: "United Kingdom of Great Britain and Northern Ireland"},
		{Code: "US", Name: "United States of America"},
		{Code: "UM", Name: "United States Minor Outlying Islands"},
		{Code: "UY", Name: "Uruguay"},
		{Code: "UZ", Name: "Uzbekistan"},
		{Code: "VU", Name: "Vanuatu"},
		{Code: "VE", Name: "Venezuela (Bolivarian Republic of)"},
		{Code: "VN", Name: "Viet Nam"},
		{Code: "VG", Name: "Virgin Islands (British)"},
		{Code: "VI", Name: "Virgin Islands (U.S.)"},
		{Code: "WF", Name: "Wallis and Futuna"},
		{Code: "EH", Name: "Western Sahara"},
		{Code: "YE", Name: "Yemen"},
		{Code: "ZM", Name: "Zambia"},
		{Code: "ZW", Name: "Zimbabwe"},
	}
}

I just got the same issue creating a country list for Python using the ISO 3166 alpha 2.

Got the same issue. My workaround was to tell it to create the list by adding only a few countries at a time (something like five). In the end I had the full list. 🤦

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I'm facing this issue with claude code. it's blocking me from continuing my implantation midway for no absolute reason. I'm not using any copyrighted content and how to do that even in code work! this error should not happen in claude code!
I reported it via /bug. but now it's a blocker and I'm looking for a workaround to continue the implementation.

Facing similar issue.

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