magi-code 0.62.0

use crate::{
    config::custom_provider_config::validate_custom_provider_settings,
    persistence::{CrossProcessFileLock, atomic_write, in_process_file_lock},
    subagents::{DEFAULT_SUBAGENT_MAX_DEPTH, MAX_SUBAGENT_MAX_DEPTH},
    thinking::ThinkingLevel,
};
use anyhow::Context;
use regex::Regex;
use schemars::JsonSchema;
use serde::{Deserialize, Serialize, de};
use std::{
    collections::{BTreeMap, BTreeSet},
    fs, io,
    net::IpAddr,
    path::{Path, PathBuf},
    time::Duration,
};

use super::{
    CustomProviderConfig, HookSettings, McPaths,
    custom_provider_config::validate_custom_provider_id,
};

#[derive(Debug, Clone, Copy, PartialEq, Eq)]
pub enum SettingsScope {
    Global,
    Project,
}

impl SettingsScope {
    pub fn label(self) -> &'static str {
        match self {
            Self::Global => "Global",
            Self::Project => "Project",
        }
    }

    pub fn toggle(self) -> Self {
        match self {
            Self::Global => Self::Project,
            Self::Project => Self::Global,
        }
    }
}

#[derive(Debug, Clone, Copy, PartialEq, Eq)]
pub enum SettingsListKind {
    Skills,
    Tools,
    Subagents,
    Models,
}

#[derive(Debug, Clone, Copy, Default, Serialize, Deserialize, JsonSchema, PartialEq, Eq)]
#[serde(rename_all = "lowercase")]
pub enum TextVerbosity {
    #[default]
    Low,
    Medium,
    High,
}

impl TextVerbosity {
    pub fn as_api_str(self) -> &'static str {
        match self {
            Self::Low => "low",
            Self::Medium => "medium",
            Self::High => "high",
        }
    }
}

#[derive(Debug, Clone, Default, Serialize, Deserialize, JsonSchema, PartialEq, Eq)]
pub struct OpenAiResponsesSettings {
    #[serde(default, skip_serializing_if = "Option::is_none")]
    pub text_verbosity: Option<TextVerbosity>,
}

impl OpenAiResponsesSettings {
    pub fn is_default(&self) -> bool {
        self == &Self::default()
    }
}

#[derive(Debug, Clone, Default, Serialize, Deserialize, JsonSchema, PartialEq, Eq)]
pub struct OpenAiCodexSettings {
    #[serde(default)]
    pub text_verbosity: TextVerbosity,
}

impl OpenAiCodexSettings {
    pub fn is_default(&self) -> bool {
        self == &Self::default()
    }
}

#[derive(Debug, Clone, Copy, Default, Serialize, Deserialize, JsonSchema, PartialEq, Eq)]
pub enum AnthropicCacheTtl {
    #[default]
    #[serde(rename = "5m")]
    FiveMinutes,
    #[serde(rename = "1h")]
    OneHour,
}

#[derive(Debug, Clone, Serialize, JsonSchema, PartialEq, Eq)]
pub struct Settings {
    #[serde(default, skip_serializing_if = "SelectedModelSettings::is_default")]
    pub selected_model: SelectedModelSettings,
    #[serde(default, skip_serializing_if = "OpenAiCodexSettings::is_default")]
    pub openai_codex: OpenAiCodexSettings,
    #[serde(default, skip_serializing_if = "OpenAiResponsesSettings::is_default")]
    pub openai_responses: OpenAiResponsesSettings,
    pub no_color: Option<bool>,
    #[serde(default, skip_serializing_if = "Option::is_none")]
    pub anthropic_cache_ttl: Option<AnthropicCacheTtl>,
    #[serde(
        default = "default_file_autocomplete_respects_gitignore",
        skip_serializing_if = "is_true"
    )]
    pub file_autocomplete_respects_gitignore: bool,
    pub context: Option<crate::context::ContextBudget>,
    #[serde(default, skip_serializing_if = "SessionTitleSettings::is_default")]
    pub session_titles: SessionTitleSettings,
    #[serde(default, skip_serializing_if = "CompactionSettings::is_default")]
    pub compaction: CompactionSettings,
    #[serde(default, skip_serializing_if = "ToolSettings::is_default")]
    pub tools: ToolSettings,
    #[serde(default, skip_serializing_if = "SubagentsSettings::is_default")]
    pub subagents: SubagentsSettings,
    #[serde(default, skip_serializing_if = "ModelsSettings::is_default")]
    pub models: ModelsSettings,
    #[serde(default, skip_serializing_if = "HookSettings::is_default")]
    pub hooks: HookSettings,
    #[serde(default, skip_serializing_if = "InstructionsSettings::is_default")]
    pub instructions: InstructionsSettings,
    #[serde(default, skip_serializing_if = "SkillsSettings::is_default")]
    pub skills: SkillsSettings,
    #[serde(default, skip_serializing_if = "BTreeMap::is_empty")]
    pub custom_providers: BTreeMap<String, CustomProviderConfig>,
    #[serde(default, skip_serializing_if = "BTreeMap::is_empty")]
    pub mcp_servers: McpServersSettings,
    #[serde(default, skip_serializing_if = "LspSettings::is_default")]
    pub lsp: LspSettings,
    #[serde(default, skip_serializing_if = "IntegrationsSettings::is_default")]
    pub integrations: IntegrationsSettings,
    #[serde(default, skip_serializing_if = "TuiSettings::is_default")]
    pub tui: TuiSettings,
    #[serde(default, skip_serializing_if = "ProviderStreamSettings::is_default")]
    pub provider_stream: ProviderStreamSettings,
    #[serde(default, skip_serializing_if = "TtsrSettings::is_default")]
    pub ttsr: TtsrSettings,
    #[serde(default, skip_serializing_if = "Option::is_none")]
    pub selected_primary_agent: Option<String>,
}

impl Default for Settings {
    fn default() -> Self {
        Self {
            openai_responses: OpenAiResponsesSettings::default(),
            selected_model: SelectedModelSettings::default(),
            openai_codex: OpenAiCodexSettings::default(),
            no_color: None,
            anthropic_cache_ttl: None,
            file_autocomplete_respects_gitignore: true,
            context: None,
            session_titles: SessionTitleSettings::default(),
            compaction: CompactionSettings::default(),
            tools: ToolSettings::default(),
            subagents: SubagentsSettings::default(),
            models: ModelsSettings::default(),
            hooks: HookSettings::default(),
            instructions: InstructionsSettings::default(),
            skills: SkillsSettings::default(),
            custom_providers: BTreeMap::new(),
            mcp_servers: BTreeMap::new(),
            lsp: LspSettings::default(),
            integrations: IntegrationsSettings::default(),
            tui: TuiSettings::default(),
            provider_stream: ProviderStreamSettings::default(),
            ttsr: TtsrSettings::default(),
            selected_primary_agent: None,
        }
    }
}

impl Settings {
    pub(crate) fn text_verbosity_for(&self, provider: &str) -> Option<TextVerbosity> {
        if provider == crate::providers::OPENAI_CODEX_PROVIDER {
            return Some(
                self.openai_responses
                    .text_verbosity
                    .unwrap_or(self.openai_codex.text_verbosity),
            );
        }
        self.custom_providers.get(provider).and_then(|custom| {
            (custom.use_responses_endpoint && custom.supports_text_verbosity)
                .then_some(self.openai_responses.text_verbosity)
                .flatten()
        })
    }
}

fn default_file_autocomplete_respects_gitignore() -> bool {
    true
}

fn is_true(value: &bool) -> bool {
    *value
}

fn is_false(value: &bool) -> bool {
    !*value
}

pub type McpServersSettings = BTreeMap<String, McpServerConfig>;
pub type LspServersSettings = BTreeMap<String, LspServerConfig>;

pub const DEFAULT_LSP_DIAGNOSTICS_WAIT_MS: u64 = 2_000;
pub const DEFAULT_LSP_IDLE_SHUTDOWN_MINUTES: u64 = 10;
pub const MAX_LSP_DIAGNOSTICS_WAIT_MS: u64 = 30_000;
pub const MAX_LSP_IDLE_SHUTDOWN_MINUTES: u64 = 240;

#[derive(Debug, Clone, Serialize, Deserialize, JsonSchema, PartialEq, Eq)]
pub struct LspSettings {
    #[serde(default)]
    pub enabled: bool,
    #[serde(default = "default_true")]
    pub inject_diagnostics_on_edit: bool,
    #[serde(default = "default_lsp_diagnostics_wait_ms")]
    pub diagnostics_wait_ms: u64,
    #[serde(default = "default_lsp_idle_shutdown_minutes")]
    pub idle_shutdown_minutes: u64,
    #[serde(default, skip_serializing_if = "BTreeMap::is_empty")]
    pub servers: LspServersSettings,
}

impl Default for LspSettings {
    fn default() -> Self {
        Self {
            enabled: false,
            inject_diagnostics_on_edit: true,
            diagnostics_wait_ms: default_lsp_diagnostics_wait_ms(),
            idle_shutdown_minutes: default_lsp_idle_shutdown_minutes(),
            servers: BTreeMap::new(),
        }
    }
}

impl LspSettings {
    pub fn is_default(&self) -> bool {
        self == &Self::default()
    }
}

#[derive(Debug, Clone, Serialize, Deserialize, JsonSchema, PartialEq, Eq)]
pub struct LspServerConfig {
    pub command: String,
    #[serde(default, skip_serializing_if = "Vec::is_empty")]
    pub args: Vec<String>,
    #[serde(default = "default_true")]
    pub enabled: bool,
}

pub fn default_lsp_diagnostics_wait_ms() -> u64 {
    DEFAULT_LSP_DIAGNOSTICS_WAIT_MS
}

pub fn default_lsp_idle_shutdown_minutes() -> u64 {
    DEFAULT_LSP_IDLE_SHUTDOWN_MINUTES
}

pub const DEFAULT_MCP_TIMEOUT_SECONDS: u64 = 30;
pub const MAX_MCP_TIMEOUT_SECONDS: u64 = 300;

#[derive(Clone, Serialize, Deserialize, JsonSchema, PartialEq, Eq)]
#[serde(tag = "type", rename_all = "snake_case")]
pub enum McpServerConfig {
    Stdio(McpStdioServerConfig),
    Http(McpHttpServerConfig),
}

impl std::fmt::Debug for McpServerConfig {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        match self {
            Self::Stdio(config) => f.debug_tuple("Stdio").field(config).finish(),
            Self::Http(config) => f.debug_tuple("Http").field(config).finish(),
        }
    }
}

impl McpServerConfig {
    pub(crate) fn enabled(&self) -> bool {
        match self {
            Self::Stdio(config) => config.enabled,
            Self::Http(config) => config.enabled,
        }
    }

    pub(crate) fn set_enabled(&mut self, enabled: bool) {
        match self {
            Self::Stdio(config) => config.enabled = enabled,
            Self::Http(config) => config.enabled = enabled,
        }
    }
}

#[derive(Clone, Serialize, Deserialize, JsonSchema, PartialEq, Eq)]
pub struct McpStdioServerConfig {
    pub command: String,
    #[serde(default, skip_serializing_if = "Vec::is_empty")]
    pub args: Vec<String>,
    #[serde(default, skip_serializing_if = "BTreeMap::is_empty")]
    pub env: BTreeMap<String, String>,
    #[serde(default = "default_true")]
    pub enabled: bool,
    #[serde(default, skip_serializing_if = "Option::is_none")]
    pub timeout: Option<u64>,
}

impl std::fmt::Debug for McpStdioServerConfig {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        f.debug_struct("McpStdioServerConfig")
            .field("command", &self.command)
            .field("args", &self.args)
            .field("env", &format_args!("<{} vars redacted>", self.env.len()))
            .field("enabled", &self.enabled)
            .field("timeout", &self.timeout)
            .finish()
    }
}

#[derive(Clone, Serialize, Deserialize, JsonSchema, PartialEq, Eq)]
pub struct McpHttpServerConfig {
    pub url: String,
    #[serde(default, skip_serializing_if = "BTreeMap::is_empty")]
    pub headers: BTreeMap<String, String>,
    #[serde(default, skip_serializing_if = "Option::is_none")]
    pub oauth: Option<McpOAuthConfig>,
    #[serde(default = "default_true")]
    pub enabled: bool,
    #[serde(default, skip_serializing_if = "Option::is_none")]
    pub timeout: Option<u64>,
}

#[derive(Clone, Serialize, Deserialize, JsonSchema, PartialEq, Eq, Default)]
pub struct McpOAuthConfig {
    #[serde(default, skip_serializing_if = "Option::is_none")]
    pub client_id: Option<String>,
    #[serde(default, skip_serializing_if = "Vec::is_empty")]
    pub scopes: Vec<String>,
    #[serde(default, skip_serializing_if = "Option::is_none")]
    pub authorization_server: Option<String>,
}

impl std::fmt::Debug for McpOAuthConfig {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        f.debug_struct("McpOAuthConfig")
            .field("client_id", &self.client_id.as_ref().map(|_| "[REDACTED]"))
            .field("scopes", &self.scopes)
            .field(
                "authorization_server",
                &self
                    .authorization_server
                    .as_ref()
                    .map(|url| sanitize_mcp_http_url_for_display(url)),
            )
            .finish()
    }
}

impl std::fmt::Debug for McpHttpServerConfig {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        f.debug_struct("McpHttpServerConfig")
            .field("url", &sanitize_mcp_http_url_for_display(&self.url))
            .field(
                "headers",
                &crate::mcp::headers::redact_headers(&self.headers),
            )
            .field("oauth", &self.oauth)
            .field("enabled", &self.enabled)
            .field("timeout", &self.timeout)
            .finish()
    }
}

pub(crate) fn validate_settings(settings: &Settings) -> anyhow::Result<()> {
    validate_custom_provider_settings(settings)?;
    validate_context_model_overrides(settings.context.as_ref())?;
    validate_mcp_servers_settings(&settings.mcp_servers)?;
    validate_lsp_settings(&settings.lsp)?;
    settings.provider_stream.validate()?;
    settings.subagents.validate()?;
    settings.ttsr.validate()?;
    Ok(())
}

fn validate_context_model_overrides(
    context: Option<&crate::context::ContextBudget>,
) -> anyhow::Result<()> {
    let Some(context) = context else {
        return Ok(());
    };
    for (key, model_override) in &context.model_overrides {
        let Some((provider, model)) = key.split_once('/') else {
            anyhow::bail!("context.model_overrides key '{key}' must use provider/model");
        };
        if provider.is_empty() || model.is_empty() {
            anyhow::bail!("context.model_overrides key '{key}' must use non-empty provider/model");
        }
        if key
            .chars()
            .any(|ch| ch.is_ascii_whitespace() || ch.is_ascii_control())
        {
            anyhow::bail!(
                "context.model_overrides key '{key}' must not contain ASCII whitespace or control characters"
            );
        }
        if model_override.is_empty() {
            anyhow::bail!(
                "context.model_overrides.{key} must set at least one of max_tokens, reserve_tokens, or keep_recent_tokens"
            );
        }
    }
    Ok(())
}

pub(crate) fn validate_lsp_settings(settings: &LspSettings) -> anyhow::Result<()> {
    if !(1..=MAX_LSP_DIAGNOSTICS_WAIT_MS).contains(&settings.diagnostics_wait_ms) {
        anyhow::bail!(
            "lsp.diagnostics_wait_ms must be between 1 and {MAX_LSP_DIAGNOSTICS_WAIT_MS} milliseconds"
        );
    }
    if !(1..=MAX_LSP_IDLE_SHUTDOWN_MINUTES).contains(&settings.idle_shutdown_minutes) {
        anyhow::bail!(
            "lsp.idle_shutdown_minutes must be between 1 and {MAX_LSP_IDLE_SHUTDOWN_MINUTES} minutes"
        );
    }
    for (name, config) in &settings.servers {
        validate_lsp_server_name(name)?;
        if config.command.trim().is_empty() {
            anyhow::bail!("lsp.servers.{name}.command must not be empty");
        }
    }
    Ok(())
}

fn validate_lsp_server_name(name: &str) -> anyhow::Result<()> {
    if name.trim().is_empty() {
        anyhow::bail!("lsp server name must not be empty");
    }
    if name.contains("__") {
        anyhow::bail!("lsp server name '{name}' must not contain '__'");
    }
    Ok(())
}

pub(crate) fn validate_mcp_servers_settings(servers: &McpServersSettings) -> anyhow::Result<()> {
    for (name, config) in servers {
        validate_mcp_server_name(name)?;
        match config {
            McpServerConfig::Stdio(stdio) => {
                if stdio.command.trim().is_empty() {
                    anyhow::bail!("mcp_servers.{name}.command must not be empty");
                }
                validate_mcp_timeout(name, stdio.timeout)?;
            }
            McpServerConfig::Http(http) => validate_mcp_http_server(name, http)?,
        }
    }
    Ok(())
}

fn validate_mcp_timeout(name: &str, timeout: Option<u64>) -> anyhow::Result<()> {
    if let Some(timeout) = timeout
        && !(1..=MAX_MCP_TIMEOUT_SECONDS).contains(&timeout)
    {
        anyhow::bail!(
            "mcp_servers.{name}.timeout must be between 1 and {MAX_MCP_TIMEOUT_SECONDS} seconds"
        );
    }
    Ok(())
}

fn sanitize_mcp_http_url_for_display(url: &str) -> String {
    match reqwest::Url::parse(url) {
        Ok(parsed) => {
            let host = parsed.host_str().unwrap_or("<unknown>");
            let port = parsed
                .port()
                .map(|port| format!(":{port}"))
                .unwrap_or_default();
            format!("{}://{}{}{}", parsed.scheme(), host, port, parsed.path())
        }
        Err(_) => "<invalid-url>".to_string(),
    }
}

fn validate_mcp_http_server(name: &str, config: &McpHttpServerConfig) -> anyhow::Result<()> {
    validate_mcp_http_url(name, &config.url)?;
    validate_mcp_timeout(name, config.timeout)?;
    if let Some(oauth) = &config.oauth {
        validate_mcp_oauth_config(name, oauth, &config.headers)?;
    }
    for (header_name, header_value) in &config.headers {
        validate_mcp_http_header_name(name, header_name)?;
        let env_ref = crate::mcp::headers::parse_env_header_ref(header_value);
        if crate::mcp::headers::is_env_header_ref_syntax(header_value) && env_ref.is_none() {
            anyhow::bail!(
                "mcp_servers.{name}.headers.{header_name} must use {{env:VAR_NAME}} with a valid environment variable name"
            );
        }
        if crate::mcp::headers::is_sensitive_header(header_name) && env_ref.is_none() {
            anyhow::bail!(
                "mcp_servers.{name}.headers.{header_name} is sensitive and must use {{env:VAR_NAME}}"
            );
        }
    }
    Ok(())
}

fn validate_mcp_oauth_config(
    name: &str,
    oauth: &McpOAuthConfig,
    headers: &BTreeMap<String, String>,
) -> anyhow::Result<()> {
    for header_name in headers.keys() {
        if header_name.eq_ignore_ascii_case("authorization")
            || header_name.eq_ignore_ascii_case("proxy-authorization")
        {
            anyhow::bail!(
                "mcp_servers.{name}.headers.{header_name} must not be configured when mcp_servers.{name}.oauth is configured"
            );
        }
    }
    if let Some(client_id) = &oauth.client_id
        && client_id.trim().is_empty()
    {
        anyhow::bail!("mcp_servers.{name}.oauth.client_id must not be empty");
    }
    for scope in &oauth.scopes {
        if scope.trim().is_empty()
            || scope
                .bytes()
                .any(|byte| !byte.is_ascii() || byte.is_ascii_control())
        {
            anyhow::bail!(
                "mcp_servers.{name}.oauth.scopes entries must be non-empty printable ASCII"
            );
        }
    }
    if let Some(url) = &oauth.authorization_server {
        validate_mcp_http_url_field(name, "oauth.authorization_server", url)?;
    }
    Ok(())
}

fn validate_mcp_http_url(name: &str, url: &str) -> anyhow::Result<()> {
    validate_mcp_http_url_field(name, "url", url)
}

pub(crate) fn validate_mcp_http_url_field(
    name: &str,
    field: &str,
    url: &str,
) -> anyhow::Result<()> {
    let parsed = reqwest::Url::parse(url)
        .map_err(|_| anyhow::anyhow!("mcp_servers.{name}.{field} must be an absolute HTTP URL"))?;
    if !parsed.username().is_empty() || parsed.password().is_some() {
        anyhow::bail!("mcp_servers.{name}.{field} must not contain credentials");
    }
    match parsed.scheme() {
        "https" => Ok(()),
        "http" if is_loopback_http_host(parsed.host_str()) => Ok(()),
        "http" => anyhow::bail!(
            "mcp_servers.{name}.{field} must use https; http is allowed only for loopback hosts"
        ),
        _ => anyhow::bail!("mcp_servers.{name}.{field} must use http or https"),
    }
}

fn is_loopback_http_host(host: Option<&str>) -> bool {
    match host {
        Some("localhost") => true,
        Some(host) => host
            .trim_matches(['[', ']'])
            .parse::<IpAddr>()
            .is_ok_and(|ip| ip.is_loopback()),
        None => false,
    }
}

fn validate_mcp_http_header_name(server_name: &str, header_name: &str) -> anyhow::Result<()> {
    if header_name.is_empty() {
        anyhow::bail!("mcp_servers.{server_name}.headers contains an empty header name");
    }
    if header_name
        .bytes()
        .any(|byte| !byte.is_ascii() || byte.is_ascii_control() || byte == b':' || byte == b' ')
    {
        anyhow::bail!(
            "mcp_servers.{server_name}.headers.{header_name} must be visible ASCII without colon, spaces, or control characters"
        );
    }
    Ok(())
}

pub(crate) fn validate_mcp_server_name(name: &str) -> anyhow::Result<()> {
    if name.is_empty() {
        anyhow::bail!("mcp server name must not be empty");
    }
    if name.contains("__") {
        anyhow::bail!("mcp server name '{name}' must not contain '__'");
    }
    if !name
        .bytes()
        .all(|byte| byte.is_ascii_alphanumeric() || byte == b'_' || byte == b'-')
    {
        anyhow::bail!(
            "mcp server name '{name}' must contain only ASCII letters, digits, '_' or '-'"
        );
    }
    Ok(())
}

#[derive(Debug, Clone, Default, Serialize, Deserialize, JsonSchema, PartialEq, Eq)]
pub struct ProviderStreamSettings {
    #[serde(default, skip_serializing_if = "Option::is_none")]
    pub semantic_progress_timeout_seconds: Option<u64>,
    #[serde(default, skip_serializing_if = "Option::is_none")]
    pub subagent_semantic_progress_timeout_seconds: Option<u64>,
}

pub const DEFAULT_PROVIDER_STREAM_SEMANTIC_PROGRESS_TIMEOUT_SECONDS: u64 = 60;
pub const DEFAULT_SUBAGENT_STREAM_SEMANTIC_PROGRESS_TIMEOUT_SECONDS: u64 = 120;
pub const MAX_PROVIDER_STREAM_SEMANTIC_PROGRESS_TIMEOUT_SECONDS: u64 = 600;

impl ProviderStreamSettings {
    pub fn is_default(&self) -> bool {
        self == &Self::default()
    }

    pub(crate) fn semantic_progress_timeout(&self) -> Duration {
        Duration::from_secs(
            self.semantic_progress_timeout_seconds
                .unwrap_or(DEFAULT_PROVIDER_STREAM_SEMANTIC_PROGRESS_TIMEOUT_SECONDS),
        )
    }

    pub(crate) fn subagent_semantic_progress_timeout(&self) -> Duration {
        Duration::from_secs(
            self.subagent_semantic_progress_timeout_seconds
                .unwrap_or(DEFAULT_SUBAGENT_STREAM_SEMANTIC_PROGRESS_TIMEOUT_SECONDS),
        )
    }

    fn validate(&self) -> anyhow::Result<()> {
        validate_provider_stream_timeout(
            "provider_stream.semantic_progress_timeout_seconds",
            self.semantic_progress_timeout_seconds,
        )?;
        validate_provider_stream_timeout(
            "provider_stream.subagent_semantic_progress_timeout_seconds",
            self.subagent_semantic_progress_timeout_seconds,
        )
    }
}

fn validate_provider_stream_timeout(field: &str, value: Option<u64>) -> anyhow::Result<()> {
    if let Some(value) = value
        && !(1..=MAX_PROVIDER_STREAM_SEMANTIC_PROGRESS_TIMEOUT_SECONDS).contains(&value)
    {
        anyhow::bail!(
            "{field} must be between 1 and {MAX_PROVIDER_STREAM_SEMANTIC_PROGRESS_TIMEOUT_SECONDS} seconds"
        );
    }
    Ok(())
}

#[derive(Debug, Clone, Default, Serialize, Deserialize, JsonSchema, PartialEq, Eq)]
pub struct TtsrSettings {
    #[serde(default, skip_serializing_if = "is_false")]
    pub enabled: bool,
    #[serde(default, skip_serializing_if = "Vec::is_empty")]
    pub rules: Vec<TtsrRuleSetting>,
}

impl TtsrSettings {
    pub fn is_default(&self) -> bool {
        self == &Self::default()
    }

    fn validate(&self) -> anyhow::Result<()> {
        if self.rules.len() > 128 {
            anyhow::bail!("ttsr.rules must contain at most 128 rules");
        }
        for (index, rule) in self.rules.iter().enumerate() {
            if rule.pattern.trim().is_empty() {
                anyhow::bail!("ttsr.rules[{index}].pattern must not be empty");
            }
            Regex::new(&rule.pattern).map_err(|_| {
                anyhow::anyhow!("ttsr.rules[{index}].pattern must be a valid regex")
            })?;
            if rule.reminder.trim().is_empty() {
                anyhow::bail!("ttsr.rules[{index}].reminder must not be empty");
            }
        }
        Ok(())
    }
}

#[derive(Debug, Clone, Default, Serialize, Deserialize, JsonSchema, PartialEq, Eq)]
pub struct TtsrRuleSetting {
    pub pattern: String,
    pub reminder: String,
}

#[derive(Debug, Clone, Default, Serialize, Deserialize, JsonSchema, PartialEq, Eq)]
pub struct SelectedModelSettings {
    #[serde(default, skip_serializing_if = "Option::is_none")]
    pub provider: Option<String>,
    #[serde(default, skip_serializing_if = "Option::is_none")]
    pub model: Option<String>,
    #[serde(default, skip_serializing_if = "Option::is_none")]
    pub thinking_level: Option<ThinkingLevel>,
    #[serde(default, flatten)]
    pub(crate) extra: BTreeMap<String, serde_json::Value>,
}

impl SelectedModelSettings {
    pub fn is_default(&self) -> bool {
        self == &Self::default()
    }
}

#[derive(Debug, Clone, Default, Serialize, Deserialize, JsonSchema, PartialEq, Eq)]
pub struct ToolOutputCompressionSettings {
    #[serde(default)]
    pub enabled: bool,
}

impl ToolOutputCompressionSettings {
    pub fn is_default(&self) -> bool {
        self == &Self::default()
    }
}

#[derive(Debug, Clone, Default, Serialize, Deserialize, JsonSchema, PartialEq, Eq)]
pub struct ToolSettings {
    #[serde(default, skip_serializing_if = "ReadToolSettings::is_default")]
    pub read: ReadToolSettings,
    #[serde(default, skip_serializing_if = "ViewImageToolSettings::is_default")]
    pub view_image: ViewImageToolSettings,
    #[serde(default, skip_serializing_if = "HashEditToolSettings::is_default")]
    pub hash_edit: HashEditToolSettings,
    #[serde(default, skip_serializing_if = "WriteToolSettings::is_default")]
    pub write: WriteToolSettings,
    #[serde(
        default,
        alias = "ffgrep",
        skip_serializing_if = "GrepToolSettings::is_default"
    )]
    pub grep: GrepToolSettings,
    #[serde(
        default,
        alias = "fffind",
        skip_serializing_if = "FindToolSettings::is_default"
    )]
    pub find: FindToolSettings,
    #[serde(default, skip_serializing_if = "ListFilesToolSettings::is_default")]
    pub list_files: ListFilesToolSettings,
    #[serde(default, skip_serializing_if = "RepoMapToolSettings::is_default")]
    pub repo_map: RepoMapToolSettings,
    #[serde(default, skip_serializing_if = "AstGrepToolSettings::is_default")]
    pub ast_grep: AstGrepToolSettings,
    #[serde(default, skip_serializing_if = "BashToolSettings::is_default")]
    pub bash: BashToolSettings,
    #[serde(
        default,
        alias = "parallel_subagents",
        skip_serializing_if = "SubagentsToolSettings::is_default"
    )]
    pub subagents: SubagentsToolSettings,
    #[serde(
        default,
        skip_serializing_if = "ToolOutputCompressionSettings::is_default"
    )]
    pub output_compression: ToolOutputCompressionSettings,
    #[serde(default, skip_serializing_if = "Vec::is_empty")]
    pub disabled: Vec<String>,
}

impl ToolSettings {
    pub fn is_default(&self) -> bool {
        self == &Self::default()
    }
}

pub const DEFAULT_SUBAGENT_SCHEMA_VALIDATION_MAX_RETRIES: u64 = 2;
pub const MAX_SUBAGENT_SCHEMA_VALIDATION_MAX_RETRIES: u64 = 5;

#[derive(Debug, Clone, Default, Serialize, Deserialize, JsonSchema, PartialEq, Eq)]
pub struct SubagentsSettings {
    #[serde(default, skip_serializing_if = "Vec::is_empty")]
    pub disabled: Vec<String>,
    #[serde(default, skip_serializing_if = "Option::is_none")]
    pub schema_validation_max_retries: Option<u64>,
    #[serde(default, flatten)]
    pub(crate) extra: BTreeMap<String, serde_json::Value>,
}

impl SubagentsSettings {
    pub fn is_default(&self) -> bool {
        self == &Self::default()
    }

    pub(crate) fn schema_validation_max_retries(&self) -> u64 {
        self.schema_validation_max_retries
            .unwrap_or(DEFAULT_SUBAGENT_SCHEMA_VALIDATION_MAX_RETRIES)
    }

    fn validate(&self) -> anyhow::Result<()> {
        if let Some(retries) = self.schema_validation_max_retries
            && retries > MAX_SUBAGENT_SCHEMA_VALIDATION_MAX_RETRIES
        {
            anyhow::bail!(
                "subagents.schema_validation_max_retries must be between 0 and {MAX_SUBAGENT_SCHEMA_VALIDATION_MAX_RETRIES}"
            );
        }
        Ok(())
    }
}

#[derive(Debug, Clone, Default, Serialize, Deserialize, JsonSchema, PartialEq, Eq)]
pub struct ModelsSettings {
    #[serde(default, skip_serializing_if = "Vec::is_empty")]
    pub disabled: Vec<String>,
    #[serde(default, flatten)]
    pub(crate) extra: BTreeMap<String, serde_json::Value>,
}

impl ModelsSettings {
    pub fn is_default(&self) -> bool {
        self == &Self::default()
    }
}

macro_rules! absolute_path_tool_settings {
    ($($name:ident),+ $(,)?) => {
        $(
            #[derive(Debug, Clone, Serialize, Deserialize, JsonSchema, PartialEq, Eq)]
            pub struct $name {
                #[serde(default = "default_true")]
                pub absolute_paths: bool,
            }

            impl Default for $name {
                fn default() -> Self {
                    Self {
                        absolute_paths: true,
                    }
                }
            }
            impl $name {
                pub fn is_default(&self) -> bool {
                    self == &Self::default()
                }
            }
        )+
    };
}

absolute_path_tool_settings!(
    ReadToolSettings,
    HashEditToolSettings,
    WriteToolSettings,
    GrepToolSettings,
    FindToolSettings,
    ListFilesToolSettings,
    RepoMapToolSettings,
    AstGrepToolSettings,
);

#[derive(Debug, Clone, Serialize, Deserialize, JsonSchema, PartialEq, Eq)]
pub struct SubagentsToolSettings {
    #[serde(default = "default_true")]
    pub absolute_paths: bool,
    #[serde(default = "default_subagent_max_depth")]
    pub max_depth: usize,
}

impl Default for SubagentsToolSettings {
    fn default() -> Self {
        Self {
            absolute_paths: true,
            max_depth: DEFAULT_SUBAGENT_MAX_DEPTH,
        }
    }
}

impl SubagentsToolSettings {
    pub fn is_default(&self) -> bool {
        self == &Self::default()
    }
}

fn default_subagent_max_depth() -> usize {
    DEFAULT_SUBAGENT_MAX_DEPTH
}

#[derive(Debug, Clone, Serialize, Deserialize, JsonSchema, PartialEq, Eq)]
pub struct BashToolSettings {
    #[serde(default = "default_true")]
    pub absolute_paths: bool,
    #[serde(default = "default_true")]
    pub shell_expansion: bool,
}

impl Default for BashToolSettings {
    fn default() -> Self {
        Self {
            absolute_paths: true,
            shell_expansion: true,
        }
    }
}

impl BashToolSettings {
    pub fn is_default(&self) -> bool {
        self == &Self::default()
    }
}

fn default_true() -> bool {
    true
}

pub const DEFAULT_VIEW_IMAGE_MAX_IMAGE_BYTES: u64 = 5 * 1024 * 1024;
pub const MAX_VIEW_IMAGE_MAX_IMAGE_BYTES: u64 = 20 * 1024 * 1024;

#[derive(Debug, Clone, Serialize, Deserialize, JsonSchema, PartialEq, Eq)]
pub struct ViewImageToolSettings {
    #[serde(default, skip_serializing_if = "Option::is_none")]
    pub vision_model: Option<ViewImageVisionModelSettings>,
    #[serde(default = "default_true")]
    pub absolute_paths: bool,
    #[serde(default = "default_view_image_max_image_bytes")]
    pub max_image_bytes: u64,
}

#[derive(Debug, Clone, Serialize, Deserialize, JsonSchema, PartialEq, Eq)]
pub struct ViewImageVisionModelSettings {
    pub provider: String,
    pub model: String,
}

impl ViewImageToolSettings {
    pub fn is_default(&self) -> bool {
        self == &Self::default()
    }
}

impl Default for ViewImageToolSettings {
    fn default() -> Self {
        Self {
            vision_model: None,
            absolute_paths: true,
            max_image_bytes: DEFAULT_VIEW_IMAGE_MAX_IMAGE_BYTES,
        }
    }
}

pub fn default_view_image_max_image_bytes() -> u64 {
    DEFAULT_VIEW_IMAGE_MAX_IMAGE_BYTES
}

pub fn validate_view_image_identifier(field: &str, value: &str) -> anyhow::Result<String> {
    let trimmed = value.trim();
    if trimmed.is_empty() {
        anyhow::bail!("tools.view_image.vision_model.{field} must not be empty");
    }
    if trimmed
        .chars()
        .any(|ch| ch.is_ascii_control() || ch.is_ascii_whitespace())
    {
        anyhow::bail!(
            "tools.view_image.vision_model.{field} must not contain ASCII whitespace or control characters"
        );
    }
    if crate::config::looks_like_secret_value(trimmed) {
        anyhow::bail!("tools.view_image.vision_model.{field} must not look like a secret value");
    }
    Ok(trimmed.to_string())
}

pub fn validate_view_image_max_image_bytes(value: u64) -> anyhow::Result<u64> {
    if !(1..=MAX_VIEW_IMAGE_MAX_IMAGE_BYTES).contains(&value) {
        anyhow::bail!(
            "tools.view_image.max_image_bytes must be between 1 and {MAX_VIEW_IMAGE_MAX_IMAGE_BYTES}"
        );
    }
    Ok(value)
}

pub(crate) fn clamp_subagent_max_depth(max_depth: usize) -> usize {
    max_depth.clamp(1, MAX_SUBAGENT_MAX_DEPTH)
}

#[derive(Debug, Clone, Default, Serialize, Deserialize, JsonSchema, PartialEq, Eq)]
pub struct IntegrationsSettings {
    #[serde(default, skip_serializing_if = "HerdrSettings::is_default")]
    pub herdr: HerdrSettings,
    #[serde(default, flatten)]
    pub(crate) extra: BTreeMap<String, serde_json::Value>,
}

impl IntegrationsSettings {
    pub fn is_default(&self) -> bool {
        self == &Self::default()
    }
}

#[derive(Debug, Default, Deserialize)]
struct SettingsWire {
    #[serde(default)]
    selected_model: SelectedModelSettings,
    #[serde(default)]
    openai_codex: OpenAiCodexSettings,
    #[serde(default)]
    openai_responses: OpenAiResponsesSettings,
    #[serde(default)]
    provider: Option<String>,
    #[serde(default)]
    model: Option<String>,
    #[serde(default)]
    no_color: Option<bool>,
    #[serde(default)]
    anthropic_cache_ttl: Option<AnthropicCacheTtl>,
    #[serde(default = "default_file_autocomplete_respects_gitignore")]
    file_autocomplete_respects_gitignore: bool,
    #[serde(default)]
    context: Option<crate::context::ContextBudget>,
    #[serde(default)]
    session_titles: SessionTitleSettings,
    #[serde(default)]
    compaction: CompactionSettings,
    #[serde(default)]
    tools: ToolSettings,
    #[serde(default)]
    subagents: SubagentsSettings,
    #[serde(default)]
    models: ModelsSettings,
    #[serde(default)]
    hooks: HookSettings,
    #[serde(default)]
    instructions: InstructionsSettings,
    #[serde(default)]
    skills: SkillsSettings,
    #[serde(default)]
    custom_providers: BTreeMap<String, CustomProviderConfig>,
    #[serde(default)]
    mcp_servers: McpServersSettings,
    #[serde(default)]
    lsp: LspSettings,
    #[serde(default)]
    integrations: IntegrationsSettings,
    #[serde(default)]
    herdr: HerdrSettings,
    #[serde(default)]
    tui: TuiSettings,
    #[serde(default)]
    provider_stream: ProviderStreamSettings,
    #[serde(default)]
    ttsr: TtsrSettings,
    #[serde(default)]
    thinking_level: Option<ThinkingLevel>,
    #[serde(default)]
    selected_primary_agent: Option<String>,
    #[serde(default)]
    disabled_skills: Vec<String>,
}

impl<'de> Deserialize<'de> for Settings {
    fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
    where
        D: serde::Deserializer<'de>,
    {
        let value = serde_json::Value::deserialize(deserializer)?;
        let mut wire: SettingsWire =
            serde_json::from_value(value.clone()).map_err(de::Error::custom)?;
        let root = value.as_object();
        if !has_path(root, &["selected_model", "provider"]) {
            wire.selected_model.provider = wire.provider;
        }
        if !has_path(root, &["selected_model", "model"]) {
            wire.selected_model.model = wire.model;
        }
        if !has_path(root, &["selected_model", "thinking_level"]) {
            wire.selected_model.thinking_level = wire.thinking_level;
        }
        if !has_path(root, &["integrations", "herdr"]) && wire.integrations.herdr.is_default() {
            wire.integrations.herdr = wire.herdr;
        }
        if !has_path(root, &["skills", "disabled"]) && wire.skills.disabled.is_empty() {
            wire.skills.disabled = wire.disabled_skills;
        }

        let settings = Self {
            selected_model: wire.selected_model,
            openai_codex: wire.openai_codex,
            openai_responses: wire.openai_responses,
            no_color: wire.no_color,
            anthropic_cache_ttl: wire.anthropic_cache_ttl,
            file_autocomplete_respects_gitignore: wire.file_autocomplete_respects_gitignore,
            context: wire.context,
            session_titles: wire.session_titles,
            compaction: wire.compaction,
            tools: wire.tools,
            subagents: wire.subagents,
            models: wire.models,
            hooks: wire.hooks,
            instructions: wire.instructions,
            skills: wire.skills,
            custom_providers: wire.custom_providers,
            mcp_servers: wire.mcp_servers,
            lsp: wire.lsp,
            integrations: wire.integrations,
            tui: wire.tui,
            provider_stream: wire.provider_stream,
            ttsr: wire.ttsr,
            selected_primary_agent: wire.selected_primary_agent,
        };
        Ok(settings)
    }
}

fn has_path(root: Option<&serde_json::Map<String, serde_json::Value>>, path: &[&str]) -> bool {
    let Some(mut current) = root.and_then(|object| object.get(path[0])) else {
        return false;
    };
    for key in &path[1..] {
        let Some(next) = current.as_object().and_then(|object| object.get(*key)) else {
            return false;
        };
        current = next;
    }
    true
}

#[derive(Debug, Clone, Default, Serialize, Deserialize, JsonSchema, PartialEq, Eq)]
pub struct HerdrSettings {
    #[serde(default)]
    pub enabled: bool,
    #[serde(default, flatten)]
    pub(crate) extra: BTreeMap<String, serde_json::Value>,
}

impl HerdrSettings {
    pub fn is_default(&self) -> bool {
        self == &Self::default()
    }
}

#[derive(Debug, Clone, Default, Serialize, Deserialize, JsonSchema, PartialEq, Eq)]
pub struct TuiSettings {
    #[serde(default, flatten)]
    pub(crate) extra: BTreeMap<String, serde_json::Value>,
}

impl TuiSettings {
    pub fn is_default(&self) -> bool {
        self == &Self::default()
    }
}

#[derive(Debug, Clone, Default, Serialize, Deserialize, JsonSchema, PartialEq, Eq)]
pub struct InstructionsSettings {
    #[serde(default, skip_serializing_if = "is_false")]
    pub subdir_discovery: bool,
    #[serde(default, skip_serializing_if = "Vec::is_empty")]
    pub additional_markdown_paths: Vec<PathBuf>,
    #[serde(default, flatten)]
    pub(crate) extra: BTreeMap<String, serde_json::Value>,
}

impl InstructionsSettings {
    pub fn is_default(&self) -> bool {
        self == &Self::default()
    }
}

#[derive(Debug, Clone, Default, Serialize, Deserialize, JsonSchema, PartialEq, Eq)]
pub struct SkillsSettings {
    #[serde(default, skip_serializing_if = "Vec::is_empty")]
    pub additional_paths: Vec<PathBuf>,
    #[serde(default, skip_serializing_if = "Vec::is_empty")]
    pub disabled: Vec<String>,
    #[serde(default, flatten)]
    pub(crate) extra: BTreeMap<String, serde_json::Value>,
}

impl SkillsSettings {
    pub fn is_default(&self) -> bool {
        self == &Self::default()
    }
}

#[derive(Debug, Clone, Default, Serialize, Deserialize, JsonSchema, PartialEq, Eq)]
pub struct CompactionSettings {
    #[serde(default, skip_serializing_if = "Option::is_none")]
    pub provider: Option<String>,
    #[serde(default, skip_serializing_if = "Option::is_none")]
    pub model: Option<String>,
}

#[derive(Debug, Clone, PartialEq, Eq)]
pub(crate) struct CompactionConfig {
    pub(crate) provider: String,
    pub(crate) model: String,
}

impl CompactionSettings {
    pub fn is_default(&self) -> bool {
        self == &Self::default()
    }

    pub(crate) fn resolve_config(
        &self,
        active_provider: &str,
        active_model: &str,
    ) -> Result<CompactionConfig, String> {
        let provider = self.provider.as_deref().map(str::trim);
        let model = self.model.as_deref().map(str::trim);
        match (provider, model) {
            (None, None) => Ok(CompactionConfig {
                provider: non_blank_active(active_provider, "provider")?.to_string(),
                model: non_blank_active(active_model, "model")?.to_string(),
            }),
            (Some(provider), Some(model)) if !provider.is_empty() && !model.is_empty() => {
                Ok(CompactionConfig {
                    provider: provider.to_string(),
                    model: model.to_string(),
                })
            }
            _ => Err("compaction.provider and compaction.model must either both be configured and non-blank, or both be omitted to inherit the active provider/model".to_string()),
        }
    }
}

fn non_blank_active<'a>(value: &'a str, field: &str) -> Result<&'a str, String> {
    let trimmed = value.trim();
    if trimmed.is_empty() {
        Err(format!(
            "active assistant {field} is blank; set active provider/model or configure both compaction.provider and compaction.model"
        ))
    } else {
        Ok(trimmed)
    }
}

#[derive(Debug, Clone, Default, Serialize, Deserialize, JsonSchema, PartialEq, Eq)]
pub struct SessionTitleSettings {
    #[serde(default)]
    pub enabled: bool,
    #[serde(default, skip_serializing_if = "Option::is_none")]
    pub provider: Option<String>,
    #[serde(default, skip_serializing_if = "Option::is_none")]
    pub model: Option<String>,
}

#[derive(Debug, Clone, PartialEq, Eq)]
pub(crate) struct SessionTitleConfig {
    pub(crate) provider: String,
    pub(crate) model: String,
}

impl SessionTitleSettings {
    pub fn is_default(&self) -> bool {
        self == &Self::default()
    }

    pub(crate) fn eligible_config(&self) -> Result<Option<SessionTitleConfig>, String> {
        if !self.enabled {
            return Ok(None);
        }
        let provider = self
            .provider
            .as_deref()
            .map(str::trim)
            .filter(|value| !value.is_empty())
            .ok_or_else(|| "session_titles.enabled is true but session_titles.provider is missing or blank; set an explicit title provider or disable session_titles".to_string())?;
        let model = self
            .model
            .as_deref()
            .map(str::trim)
            .filter(|value| !value.is_empty())
            .ok_or_else(|| "session_titles.enabled is true but session_titles.model is missing or blank; set an explicit title model or disable session_titles".to_string())?;
        Ok(Some(SessionTitleConfig {
            provider: provider.to_string(),
            model: model.to_string(),
        }))
    }
}

pub(crate) fn upsert_custom_provider(
    paths: &McPaths,
    id: &str,
    mut config: CustomProviderConfig,
) -> anyhow::Result<()> {
    let id = validate_custom_provider_id(id)?;
    update_settings_preserving_unknown_top_level_fields(paths, |settings| {
        if let Some(existing) = settings.custom_providers.get(&id) {
            config.models_dev_provider = existing.models_dev_provider.clone();
            config.use_responses_endpoint = existing.use_responses_endpoint;
            config.reasoning_protocol = existing.reasoning_protocol;
            config.extra_models = existing.extra_models.clone();
        }
        settings.custom_providers.insert(id, config);
    })
}

pub(crate) fn remove_custom_provider(paths: &McPaths, id: &str) -> anyhow::Result<bool> {
    let id = validate_custom_provider_id(id)?;
    let mut removed = false;
    update_settings_preserving_unknown_top_level_fields(paths, |settings| {
        removed = settings.custom_providers.remove(&id).is_some();
    })?;
    Ok(removed)
}

pub(crate) const SETTINGS_SCHEMA_RELATIVE_REF: &str = "./state/settings.schema.json";
const SETTINGS_SCHEMA_FILE_NAME: &str = "settings.schema.json";

pub(crate) fn ensure_settings_schema_files(paths: &McPaths) -> anyhow::Result<()> {
    let schema_path = paths.state.join(SETTINGS_SCHEMA_FILE_NAME);
    let schema = schemars::schema_for!(Settings);
    write_file_if_changed(
        &schema_path,
        serde_json::to_string_pretty(&schema)?.as_bytes(),
    )?;

    let settings_lock = settings_file_lock(&paths.settings_file)?;
    let _settings_guard = settings_lock
        .lock()
        .map_err(|_| anyhow::anyhow!("settings lock was poisoned"))?;
    let _file_guard = CrossProcessFileLock::acquire(&paths.settings_file)?;
    let original = match fs::read_to_string(&paths.settings_file) {
        Ok(text) => text,
        Err(error) if error.kind() == io::ErrorKind::NotFound => {
            let mut raw = serde_json::json!({});
            insert_default_schema_ref_if_absent(&mut raw);
            atomic_write(
                &paths.settings_file,
                serde_json::to_string_pretty(&raw)?.as_bytes(),
            )?;
            return Ok(());
        }
        Err(error) => {
            return Err(error)
                .with_context(|| format!("failed to read {}", paths.settings_file.display()));
        }
    };

    let mut raw: serde_json::Value = match serde_json::from_str(&original) {
        Ok(value) => value,
        Err(_) => return Ok(()),
    };
    if !raw.is_object() {
        return Ok(());
    }
    let settings: Settings = match serde_json::from_value(raw.clone()) {
        Ok(settings) => settings,
        Err(_) => return Ok(()),
    };
    if validate_settings(&settings).is_err() {
        return Ok(());
    }
    if insert_default_schema_ref_if_absent(&mut raw) {
        atomic_write(
            &paths.settings_file,
            serde_json::to_string_pretty(&raw)?.as_bytes(),
        )?;
    }
    Ok(())
}

fn write_file_if_changed(path: &Path, bytes: &[u8]) -> anyhow::Result<bool> {
    match fs::read(path) {
        Ok(existing) if existing == bytes => Ok(false),
        Ok(_) => {
            atomic_write(path, bytes)?;
            Ok(true)
        }
        Err(error) if error.kind() == io::ErrorKind::NotFound => {
            atomic_write(path, bytes)?;
            Ok(true)
        }
        Err(error) => Err(error).with_context(|| format!("failed to read {}", path.display())),
    }
}

fn insert_default_schema_ref_if_absent(raw: &mut serde_json::Value) -> bool {
    let Some(object) = raw.as_object_mut() else {
        return false;
    };
    if object.contains_key("$schema") {
        return false;
    }
    object.insert(
        "$schema".to_string(),
        serde_json::Value::String(SETTINGS_SCHEMA_RELATIVE_REF.to_string()),
    );
    true
}

pub(crate) fn disabled_skill_names_from_settings(settings: &Settings) -> BTreeSet<String> {
    normalized_name_set(&settings.skills.disabled)
}

pub(crate) fn disabled_tool_names_from_settings(settings: &Settings) -> BTreeSet<String> {
    normalized_name_set(&settings.tools.disabled)
}

pub(crate) fn disabled_subagent_profile_names_from_settings(
    settings: &Settings,
) -> BTreeSet<String> {
    normalized_name_set(&settings.subagents.disabled)
}

pub(crate) fn disabled_model_ids_from_settings(settings: &Settings) -> BTreeSet<String> {
    normalized_name_set(&settings.models.disabled)
}

fn normalized_name_set(names: &[String]) -> BTreeSet<String> {
    names
        .iter()
        .map(|name| name.trim())
        .filter(|name| !name.is_empty())
        .map(ToString::to_string)
        .collect()
}

fn disabled_names_from_settings(settings: &Settings, kind: SettingsListKind) -> BTreeSet<String> {
    match kind {
        SettingsListKind::Skills => disabled_skill_names_from_settings(settings),
        SettingsListKind::Tools => disabled_tool_names_from_settings(settings),
        SettingsListKind::Subagents => disabled_subagent_profile_names_from_settings(settings),
        SettingsListKind::Models => disabled_model_ids_from_settings(settings),
    }
}

#[cfg_attr(not(test), allow(dead_code))]
pub(crate) fn disabled_skill_names(paths: &McPaths) -> anyhow::Result<BTreeSet<String>> {
    Ok(disabled_skill_names_from_settings(&read_settings(paths)?))
}

pub(crate) fn selected_primary_agent(paths: &McPaths) -> anyhow::Result<Option<String>> {
    Ok(read_settings(paths)?.selected_primary_agent)
}

pub(crate) fn load_config_with_settings(
    paths: McPaths,
    cli: super::CliConfigOverrides,
) -> anyhow::Result<(super::EffectiveConfig, Settings)> {
    let settings = read_settings(&paths)?;
    let config = super::EffectiveConfig::from_loaded_settings(paths, cli, settings.clone())?;
    Ok((config, settings))
}

pub(crate) fn set_thinking_level(
    paths: &McPaths,
    level: ThinkingLevel,
) -> anyhow::Result<ThinkingLevel> {
    update_settings_preserving_unknown_top_level_fields(paths, |settings| {
        settings.selected_model.thinking_level = Some(level);
    })?;
    Ok(level)
}

pub(crate) fn set_selected_primary_agent(
    paths: &McPaths,
    selected: Option<&str>,
) -> anyhow::Result<Option<String>> {
    let selected = selected
        .map(crate::primary_agents::validate_primary_agent_id)
        .transpose()?;
    update_settings_preserving_unknown_top_level_fields(paths, |settings| {
        settings.selected_primary_agent = selected.clone();
    })?;
    Ok(selected)
}

#[cfg_attr(not(test), allow(dead_code))]
pub(crate) fn set_skill_disabled(
    paths: &McPaths,
    skill_name: &str,
    disabled: bool,
) -> anyhow::Result<BTreeSet<String>> {
    set_skill_disabled_for_scope(paths, SettingsScope::Global, skill_name, disabled)
}

pub(crate) fn set_skill_disabled_for_scope(
    paths: &McPaths,
    scope: SettingsScope,
    skill_name: &str,
    disabled: bool,
) -> anyhow::Result<BTreeSet<String>> {
    update_disabled_name_for_scope(paths, scope, SettingsListKind::Skills, skill_name, disabled)
}

pub(crate) fn set_tool_disabled(
    paths: &McPaths,
    scope: SettingsScope,
    tool_name: &str,
    disabled: bool,
) -> anyhow::Result<BTreeSet<String>> {
    update_disabled_name_for_scope(paths, scope, SettingsListKind::Tools, tool_name, disabled)
}

pub(crate) fn set_subagent_profile_disabled(
    paths: &McPaths,
    scope: SettingsScope,
    profile_id: &str,
    disabled: bool,
) -> anyhow::Result<BTreeSet<String>> {
    update_disabled_name_for_scope(
        paths,
        scope,
        SettingsListKind::Subagents,
        profile_id,
        disabled,
    )
}

pub(crate) fn set_model_disabled_for_scope(
    paths: &McPaths,
    scope: SettingsScope,
    model_id: &str,
    disabled: bool,
) -> anyhow::Result<BTreeSet<String>> {
    update_disabled_name_for_scope(paths, scope, SettingsListKind::Models, model_id, disabled)
}

fn update_disabled_name_for_scope(
    paths: &McPaths,
    scope: SettingsScope,
    kind: SettingsListKind,
    name: &str,
    disabled: bool,
) -> anyhow::Result<BTreeSet<String>> {
    let name = name.trim();
    if name.is_empty() {
        anyhow::bail!("setting name must be non-empty");
    }
    let seed_from_effective =
        scope == SettingsScope::Project && !scope_has_disabled_list(paths, scope, kind)?;
    let mut effective = if seed_from_effective {
        disabled_names_from_settings(&read_settings(paths)?, kind)
    } else {
        disabled_names_from_settings(&read_settings_for_scope(paths, scope)?, kind)
    };
    if disabled {
        effective.insert(name.to_string());
    } else {
        effective.remove(name);
    }
    let list = effective.iter().cloned().collect::<Vec<_>>();
    update_settings_for_scope_preserving_unknown_top_level_fields(paths, scope, |settings| {
        match kind {
            SettingsListKind::Skills => settings.skills.disabled = list.clone(),
            SettingsListKind::Tools => settings.tools.disabled = list.clone(),
            SettingsListKind::Subagents => settings.subagents.disabled = list.clone(),
            SettingsListKind::Models => settings.models.disabled = list.clone(),
        }
    })?;
    if scope == SettingsScope::Project && list.is_empty() {
        preserve_explicit_empty_disabled_list(paths, scope, kind)?;
    }
    Ok(effective)
}

pub(crate) fn disabled_names_for_modal_scope(
    paths: &McPaths,
    scope: SettingsScope,
    kind: SettingsListKind,
) -> anyhow::Result<BTreeSet<String>> {
    if scope == SettingsScope::Project && !scope_has_disabled_list(paths, scope, kind)? {
        return Ok(disabled_names_from_settings(&read_settings(paths)?, kind));
    }
    Ok(disabled_names_from_settings(
        &read_settings_for_scope(paths, scope)?,
        kind,
    ))
}

pub(crate) fn scope_has_disabled_list(
    paths: &McPaths,
    scope: SettingsScope,
    kind: SettingsListKind,
) -> anyhow::Result<bool> {
    let raw = read_settings_json_or_empty(&settings_path_for_scope(paths, scope))?;
    Ok(match kind {
        SettingsListKind::Skills => has_path(raw.as_object(), &["skills", "disabled"]),
        SettingsListKind::Tools => has_path(raw.as_object(), &["tools", "disabled"]),
        SettingsListKind::Subagents => has_path(raw.as_object(), &["subagents", "disabled"]),
        SettingsListKind::Models => has_path(raw.as_object(), &["models", "disabled"]),
    })
}

pub(crate) fn set_mcp_server_enabled(
    paths: &McPaths,
    name: &str,
    enabled: bool,
) -> anyhow::Result<()> {
    validate_mcp_server_name(name)?;
    let name = name.to_string();
    let mut found = false;
    update_settings_preserving_unknown_top_level_fields(paths, |settings| {
        if let Some(config) = settings.mcp_servers.get_mut(&name) {
            config.set_enabled(enabled);
            found = true;
        }
    })?;
    if !found {
        anyhow::bail!("mcp server not found: {name}");
    }
    Ok(())
}

pub(crate) fn set_selected_model(
    paths: &McPaths,
    provider: &str,
    model: &str,
) -> anyhow::Result<()> {
    update_settings_preserving_unknown_top_level_fields(paths, |settings| {
        settings.selected_model.provider = Some(provider.to_string());
        settings.selected_model.model = Some(model.to_string());
    })
}

pub(crate) fn update_settings_preserving_unknown_top_level_fields(
    paths: &McPaths,
    mutate: impl FnOnce(&mut Settings),
) -> anyhow::Result<()> {
    update_settings_for_scope_preserving_unknown_top_level_fields(
        paths,
        SettingsScope::Global,
        mutate,
    )
}

pub(crate) fn read_settings_for_scope(
    paths: &McPaths,
    scope: SettingsScope,
) -> anyhow::Result<Settings> {
    let raw = read_settings_json_or_empty(&settings_path_for_scope(paths, scope))?;
    let settings: Settings = serde_json::from_value(raw)?;
    validate_settings(&settings)?;
    Ok(settings)
}

pub(crate) fn update_settings_for_scope_preserving_unknown_top_level_fields(
    paths: &McPaths,
    scope: SettingsScope,
    mutate: impl FnOnce(&mut Settings),
) -> anyhow::Result<()> {
    prepare_settings_scope_dir(paths, scope)?;
    let target = settings_path_for_scope(paths, scope);
    let settings_lock = settings_file_lock(&target)?;
    let _settings_guard = settings_lock
        .lock()
        .map_err(|_| anyhow::anyhow!("settings lock was poisoned"))?;
    let _file_guard = CrossProcessFileLock::acquire(&target)?;
    let original = read_settings_text_or_empty(&target)?;
    let mut raw: serde_json::Value = serde_json::from_str(&original)?;
    if !raw.is_object() {
        raw = serde_json::json!({});
    }
    let mut settings: Settings = serde_json::from_value(raw.clone())?;
    mutate(&mut settings);
    validate_settings(&settings)?;
    update_raw_from_settings(&mut raw, &settings, scope)?;
    atomic_write(&target, serde_json::to_string_pretty(&raw)?.as_bytes())?;
    Ok(())
}

fn settings_path_for_scope(paths: &McPaths, scope: SettingsScope) -> PathBuf {
    match scope {
        SettingsScope::Global => paths.settings_file.clone(),
        SettingsScope::Project => paths.project_settings_file.clone(),
    }
}

fn prepare_settings_scope_dir(paths: &McPaths, scope: SettingsScope) -> anyhow::Result<()> {
    match scope {
        SettingsScope::Global => fs::create_dir_all(&paths.root)?,
        SettingsScope::Project => {
            validate_project_settings_target(paths)?;
            if let Some(parent) = paths.project_settings_file.parent() {
                fs::create_dir_all(parent)?;
            }
        }
    }
    Ok(())
}

fn validate_project_settings_target(paths: &McPaths) -> anyhow::Result<()> {
    let settings = &paths.project_settings_file;
    let Some(project_dir) = settings.parent().and_then(Path::parent) else {
        anyhow::bail!(
            "project settings path has no project directory: {}",
            settings.display()
        );
    };
    let marker_dir = project_dir.join(".magi-code");
    let canonical_project = project_dir.canonicalize().with_context(|| {
        format!(
            "failed to canonicalize project dir {}",
            project_dir.display()
        )
    })?;
    if marker_dir.exists() {
        let canonical_marker = marker_dir.canonicalize().with_context(|| {
            format!(
                "failed to canonicalize project config dir {}",
                marker_dir.display()
            )
        })?;
        if !canonical_marker.starts_with(&canonical_project) {
            anyhow::bail!("project config dir escapes cwd: {}", marker_dir.display());
        }
    }
    if settings.exists() {
        let canonical_settings = settings.canonicalize().with_context(|| {
            format!(
                "failed to canonicalize project settings file {}",
                settings.display()
            )
        })?;
        if !canonical_settings.starts_with(&canonical_project) {
            anyhow::bail!("project settings file escapes cwd: {}", settings.display());
        }
    }
    Ok(())
}

fn update_raw_from_settings(
    raw: &mut serde_json::Value,
    settings: &Settings,
    scope: SettingsScope,
) -> anyhow::Result<()> {
    let openai_codex = serde_json::to_value(&settings.openai_codex)?;
    let selected_model = serde_json::to_value(&settings.selected_model)?;
    let custom = serde_json::to_value(&settings.custom_providers)?;
    let mcp_servers = serde_json::to_value(&settings.mcp_servers)?;
    let lsp = serde_json::to_value(&settings.lsp)?;
    let session_titles = serde_json::to_value(&settings.session_titles)?;
    let compaction = serde_json::to_value(&settings.compaction)?;
    let context = serde_json::to_value(&settings.context)?;
    let tools = tools_value_preserving_unknowns(raw, &settings.tools)?;
    let hooks = hooks_value_preserving_unknowns(raw, &settings.hooks)?;
    let preserve_default_hooks = settings.hooks.is_default() && hooks_has_unknown_fields(raw);
    let instructions = serde_json::to_value(&settings.instructions)?;
    let skills = serde_json::to_value(&settings.skills)?;
    let subagents = serde_json::to_value(&settings.subagents)?;
    let models = serde_json::to_value(&settings.models)?;
    let integrations = serde_json::to_value(&settings.integrations)?;
    let tui = serde_json::to_value(&settings.tui)?;
    let provider_stream = serde_json::to_value(&settings.provider_stream)?;
    let ttsr = serde_json::to_value(&settings.ttsr)?;
    let selected_primary_agent = serde_json::to_value(&settings.selected_primary_agent)?;
    let preserve_tools = raw_group_has_unknown_fields(raw, "tools", KNOWN_TOOL_KEYS);
    let preserve_subagents = raw_group_has_unknown_fields(raw, "subagents", KNOWN_SUBAGENTS_KEYS);
    let preserve_models = raw_group_has_unknown_fields(raw, "models", KNOWN_MODELS_KEYS);
    let object = raw.as_object_mut().expect("settings raw object");
    for legacy_key in [
        "provider",
        "model",
        "thinking_level",
        "herdr",
        "disabled_skills",
    ] {
        object.remove(legacy_key);
    }
    if settings.selected_model.is_default() {
        object.remove("selected_model");
    } else {
        object.insert("selected_model".to_string(), selected_model);
    }
    if settings.openai_codex.is_default() {
        object.remove("openai_codex");
    } else {
        object.insert("openai_codex".to_string(), openai_codex);
    }
    if let Some(no_color) = settings.no_color {
        object.insert("no_color".to_string(), serde_json::to_value(no_color)?);
    } else {
        object.remove("no_color");
    }
    if settings.file_autocomplete_respects_gitignore {
        object.remove("file_autocomplete_respects_gitignore");
    } else {
        object.insert(
            "file_autocomplete_respects_gitignore".to_string(),
            serde_json::to_value(settings.file_autocomplete_respects_gitignore)?,
        );
    }
    object.insert("context".to_string(), context);
    if settings.custom_providers.is_empty() {
        object.remove("custom_providers");
    } else {
        object.insert("custom_providers".to_string(), custom);
    }
    if settings.mcp_servers.is_empty() {
        object.remove("mcp_servers");
    } else {
        object.insert("mcp_servers".to_string(), mcp_servers);
    }
    if settings.lsp.is_default() {
        object.remove("lsp");
    } else {
        object.insert("lsp".to_string(), lsp);
    }
    if settings.session_titles.is_default() {
        object.remove("session_titles");
    } else {
        object.insert("session_titles".to_string(), session_titles);
    }
    if settings.compaction.is_default() {
        object.remove("compaction");
    } else {
        object.insert("compaction".to_string(), compaction);
    }
    if settings.tools.is_default() && !preserve_tools {
        object.remove("tools");
    } else {
        object.insert("tools".to_string(), tools);
    }
    if settings.hooks.is_default() && !preserve_default_hooks {
        object.remove("hooks");
    } else {
        object.insert("hooks".to_string(), hooks);
    }
    if settings.instructions.is_default() {
        object.remove("instructions");
    } else {
        object.insert("instructions".to_string(), instructions);
    }
    if settings.skills.is_default() {
        object.remove("skills");
    } else {
        object.insert("skills".to_string(), skills);
    }
    if settings.subagents.is_default() && !preserve_subagents {
        object.remove("subagents");
    } else {
        object.insert("subagents".to_string(), subagents);
    }
    if settings.models.is_default() && !preserve_models {
        object.remove("models");
    } else {
        object.insert("models".to_string(), models);
    }
    if settings.integrations.is_default() {
        object.remove("integrations");
    } else {
        object.insert("integrations".to_string(), integrations);
    }
    if settings.tui.is_default() {
        object.remove("tui");
    } else {
        object.insert("tui".to_string(), tui);
    }
    if settings.provider_stream.is_default() {
        object.remove("provider_stream");
    } else {
        object.insert("provider_stream".to_string(), provider_stream);
    }
    if settings.ttsr.is_default() {
        object.remove("ttsr");
    } else {
        object.insert("ttsr".to_string(), ttsr);
    }
    if settings.selected_primary_agent.is_some() || object.contains_key("selected_primary_agent") {
        object.insert("selected_primary_agent".to_string(), selected_primary_agent);
    }
    if let Some(cache_ttl) = settings.anthropic_cache_ttl {
        object.insert(
            "anthropic_cache_ttl".to_string(),
            serde_json::to_value(cache_ttl)?,
        );
    } else {
        object.remove("anthropic_cache_ttl");
    }
    if scope == SettingsScope::Global {
        insert_default_schema_ref_if_absent(raw);
    }
    Ok(())
}

pub(crate) fn read_settings(paths: &McPaths) -> anyhow::Result<Settings> {
    let mut raw = read_settings_json_or_empty(&paths.settings_file)?;
    let local_path = paths
        .local_settings_file
        .as_ref()
        .filter(|path| path.exists())
        .unwrap_or(&paths.project_settings_file);
    if local_path.exists() {
        let local = read_settings_json_or_empty(local_path)?;
        deep_merge_json(&mut raw, &local);
    }
    let settings: Settings = serde_json::from_value(raw)?;
    validate_settings(&settings)?;
    Ok(settings)
}

#[cfg_attr(not(test), allow(dead_code))]
pub(crate) fn write_settings(paths: &McPaths, settings: &Settings) -> anyhow::Result<()> {
    validate_settings(settings)?;
    fs::create_dir_all(&paths.root)?;
    let settings_lock = settings_file_lock(&paths.settings_file)?;
    let _settings_guard = settings_lock
        .lock()
        .map_err(|_| anyhow::anyhow!("settings lock was poisoned"))?;
    let _file_guard = CrossProcessFileLock::acquire(&paths.settings_file)?;
    let mut raw = serde_json::to_value(settings)?;
    insert_default_schema_ref_if_absent(&mut raw);
    atomic_write(
        &paths.settings_file,
        serde_json::to_string_pretty(&raw)?.as_bytes(),
    )?;
    Ok(())
}

fn preserve_explicit_empty_disabled_list(
    paths: &McPaths,
    scope: SettingsScope,
    kind: SettingsListKind,
) -> anyhow::Result<()> {
    let target = settings_path_for_scope(paths, scope);
    let settings_lock = settings_file_lock(&target)?;
    let _settings_guard = settings_lock
        .lock()
        .map_err(|_| anyhow::anyhow!("settings lock was poisoned"))?;
    let _file_guard = CrossProcessFileLock::acquire(&target)?;
    let mut raw = read_settings_json_or_empty(&target)?;
    if !raw.is_object() {
        raw = serde_json::json!({});
    }
    let (group, key) = match kind {
        SettingsListKind::Skills => ("skills", "disabled"),
        SettingsListKind::Tools => ("tools", "disabled"),
        SettingsListKind::Subagents => ("subagents", "disabled"),
        SettingsListKind::Models => ("models", "disabled"),
    };
    let object = raw.as_object_mut().expect("settings raw object");
    let group_value = object
        .entry(group.to_string())
        .or_insert_with(|| serde_json::json!({}));
    if !group_value.is_object() {
        *group_value = serde_json::json!({});
    }
    group_value
        .as_object_mut()
        .expect("settings group object")
        .insert(key.to_string(), serde_json::Value::Array(Vec::new()));
    atomic_write(&target, serde_json::to_string_pretty(&raw)?.as_bytes())?;
    Ok(())
}

const KNOWN_TOOL_KEYS: &[&str] = &[
    "read",
    "view_image",
    "hash_edit",
    "write",
    "grep",
    "ffgrep",
    "find",
    "fffind",
    "list_files",
    "repo_map",
    "ast_grep",
    "bash",
    "subagents",
    "parallel_subagents",
    "output_compression",
    "disabled",
];
const KNOWN_SUBAGENTS_KEYS: &[&str] = &["disabled", "schema_validation_max_retries"];
const KNOWN_MODELS_KEYS: &[&str] = &["disabled"];

fn tools_value_preserving_unknowns(
    raw: &serde_json::Value,
    tools: &ToolSettings,
) -> anyhow::Result<serde_json::Value> {
    group_value_preserving_unknowns(raw, "tools", tools)
}

fn group_value_preserving_unknowns<T: Serialize>(
    raw: &serde_json::Value,
    group: &str,
    value: &T,
) -> anyhow::Result<serde_json::Value> {
    let mut next_value = serde_json::to_value(value)?;
    let Some(original) = raw.get(group).and_then(serde_json::Value::as_object) else {
        return Ok(next_value);
    };
    let Some(next) = next_value.as_object_mut() else {
        return Ok(next_value);
    };
    for (key, value) in original {
        next.entry(key.clone()).or_insert_with(|| value.clone());
    }
    Ok(next_value)
}

fn raw_group_has_unknown_fields(raw: &serde_json::Value, group: &str, known_keys: &[&str]) -> bool {
    raw.get(group)
        .and_then(serde_json::Value::as_object)
        .is_some_and(|object| object.keys().any(|key| !known_keys.contains(&key.as_str())))
}

fn hooks_value_preserving_unknowns(
    raw: &serde_json::Value,
    hooks: &HookSettings,
) -> anyhow::Result<serde_json::Value> {
    let mut hooks_value = serde_json::to_value(hooks)?;
    let Some(original) = raw.get("hooks").and_then(serde_json::Value::as_object) else {
        return Ok(hooks_value);
    };
    let Some(next) = hooks_value.as_object_mut() else {
        return Ok(hooks_value);
    };
    for (key, value) in original {
        next.entry(key.clone()).or_insert_with(|| value.clone());
    }
    Ok(hooks_value)
}

fn hooks_has_unknown_fields(raw: &serde_json::Value) -> bool {
    const KNOWN_HOOK_KEYS: &[&str] = &[
        "enabled",
        "show_in_tui",
        "payload",
        "timeout_seconds",
        "stdout_max_bytes",
        "stderr_max_bytes",
        "failure_policy",
        "provider_context_injection",
        "provider_context_max_bytes",
        "injected_content",
        "before_tool",
        "after_tool",
        "after_assistant",
        "after_reasoning",
    ];
    raw.get("hooks")
        .and_then(serde_json::Value::as_object)
        .is_some_and(|hooks| {
            hooks
                .keys()
                .any(|key| !KNOWN_HOOK_KEYS.contains(&key.as_str()))
        })
}

fn deep_merge_json(base: &mut serde_json::Value, override_val: &serde_json::Value) {
    match (base, override_val) {
        (serde_json::Value::Object(base_object), serde_json::Value::Object(override_object)) => {
            for (key, value) in override_object {
                match base_object.get_mut(key) {
                    Some(base_value) => deep_merge_json(base_value, value),
                    None => {
                        base_object.insert(key.clone(), value.clone());
                    }
                }
            }
        }
        (base_value, override_value) => *base_value = override_value.clone(),
    }
}

fn read_settings_json_or_empty(path: &Path) -> anyhow::Result<serde_json::Value> {
    let text = read_settings_text_or_empty(path)?;
    serde_json::from_str(&text)
        .with_context(|| format!("failed to parse settings JSON from {}", path.display()))
}

fn read_settings_text_or_empty(path: &Path) -> anyhow::Result<String> {
    match fs::read_to_string(path) {
        Ok(text) => Ok(text),
        Err(error) if error.kind() == io::ErrorKind::NotFound => Ok("{}".to_string()),
        Err(error) => Err(error).with_context(|| format!("failed to read {}", path.display())),
    }
}

fn settings_file_lock(path: &Path) -> anyhow::Result<std::sync::Arc<std::sync::Mutex<()>>> {
    in_process_file_lock(path, "settings")
}

#[cfg(test)]
mod tests {
    use super::*;
    use serde_json::json;
    use std::path::PathBuf;

    fn read_settings_value(paths: &McPaths) -> serde_json::Value {
        serde_json::from_str(&fs::read_to_string(&paths.settings_file).unwrap()).unwrap()
    }

    fn parse_validated_settings(raw: &str) -> anyhow::Result<Settings> {
        let settings = serde_json::from_str(raw)?;
        validate_settings(&settings)?;
        Ok(settings)
    }

    #[test]
    fn subagents_schema_retry_settings_default_bounds_and_update_preservation() {
        let default_settings: Settings = serde_json::from_str("{}").unwrap();
        assert_eq!(
            default_settings.subagents.schema_validation_max_retries(),
            DEFAULT_SUBAGENT_SCHEMA_VALIDATION_MAX_RETRIES
        );

        let too_high =
            parse_validated_settings(r#"{"subagents":{"schema_validation_max_retries":6}}"#)
                .unwrap_err()
                .to_string();
        assert!(too_high.contains("subagents.schema_validation_max_retries"));

        let mut raw = json!({
            "subagents": {"schema_validation_max_retries": 5},
            "selected_primary_agent": "old"
        });
        let mut settings: Settings = serde_json::from_value(raw.clone()).unwrap();
        settings.selected_primary_agent = Some("new".to_string());

        update_raw_from_settings(&mut raw, &settings, SettingsScope::Global).unwrap();

        assert_eq!(raw["subagents"]["schema_validation_max_retries"], 5);
        assert!(KNOWN_SUBAGENTS_KEYS.contains(&"schema_validation_max_retries"));
    }

    #[test]
    fn settings_ttsr_defaults_disabled_and_explicit_true_survives() {
        let default_settings: Settings = serde_json::from_str("{}").unwrap();
        assert!(!default_settings.ttsr.enabled);

        let explicit_enabled: Settings =
            serde_json::from_str(r#"{"ttsr":{"enabled":true}}"#).unwrap();
        assert!(explicit_enabled.ttsr.enabled);
    }

    #[test]
    fn settings_ttsr_rejects_invalid_regex_and_empty_reminder() {
        let invalid_regex =
            parse_validated_settings(r#"{"ttsr":{"rules":[{"pattern":"(","reminder":"stop"}]}}"#)
                .unwrap_err()
                .to_string();
        assert!(invalid_regex.contains("ttsr.rules[0].pattern"));

        let empty_reminder = parse_validated_settings(
            r#"{"ttsr":{"rules":[{"pattern":"danger","reminder":"  "}]}}"#,
        )
        .unwrap_err()
        .to_string();
        assert!(empty_reminder.contains("ttsr.rules[0].reminder"));
    }

    #[test]
    fn ttsr_settings_survive_update_raw_from_settings() {
        let mut raw = json!({
            "ttsr": {"rules": [{"pattern": "danger", "reminder": "stop"}]},
            "selected_primary_agent": "old"
        });
        let mut settings: Settings = serde_json::from_value(raw.clone()).unwrap();
        settings.selected_primary_agent = Some("new".to_string());

        update_raw_from_settings(&mut raw, &settings, SettingsScope::Global).unwrap();

        assert_eq!(raw["ttsr"]["rules"][0]["pattern"], "danger");
        assert_eq!(raw["selected_primary_agent"], "new");
    }

    #[test]
    fn provider_stream_settings_defaults_parse_validate_and_resolve() {
        let absent: Settings = serde_json::from_str("{}").unwrap();
        assert_eq!(absent.provider_stream, ProviderStreamSettings::default());
        assert_eq!(
            absent.provider_stream.semantic_progress_timeout(),
            Duration::from_secs(DEFAULT_PROVIDER_STREAM_SEMANTIC_PROGRESS_TIMEOUT_SECONDS)
        );
        assert_eq!(
            absent.provider_stream.subagent_semantic_progress_timeout(),
            Duration::from_secs(DEFAULT_SUBAGENT_STREAM_SEMANTIC_PROGRESS_TIMEOUT_SECONDS)
        );

        let configured: Settings = serde_json::from_str(
            r#"{"provider_stream":{"semantic_progress_timeout_seconds":90,"subagent_semantic_progress_timeout_seconds":180}}"#,
        )
        .unwrap();
        validate_settings(&configured).unwrap();
        assert_eq!(
            configured.provider_stream.semantic_progress_timeout(),
            Duration::from_secs(90)
        );
        assert_eq!(
            configured
                .provider_stream
                .subagent_semantic_progress_timeout(),
            Duration::from_secs(180)
        );

        let too_low = parse_validated_settings(
            r#"{"provider_stream":{"semantic_progress_timeout_seconds":0}}"#,
        )
        .unwrap_err()
        .to_string();
        assert!(too_low.contains("provider_stream.semantic_progress_timeout_seconds"));

        let too_high = parse_validated_settings(
            r#"{"provider_stream":{"subagent_semantic_progress_timeout_seconds":601}}"#,
        )
        .unwrap_err()
        .to_string();
        assert!(too_high.contains("provider_stream.subagent_semantic_progress_timeout_seconds"));
    }

    #[test]
    fn write_file_if_changed_skips_identical_content() {
        let temp = tempfile::TempDir::new().unwrap();
        let path = temp.path().join("schema.json");

        assert!(write_file_if_changed(&path, b"one").unwrap());
        assert!(!write_file_if_changed(&path, b"one").unwrap());
        assert!(write_file_if_changed(&path, b"two").unwrap());
        assert_eq!(fs::read(&path).unwrap(), b"two");
    }

    #[test]
    fn settings_schema_generation_writes_state_schema_with_core_properties() {
        let temp = tempfile::TempDir::new().unwrap();
        let paths = McPaths::from_root(temp.path().join("mc"));
        fs::create_dir_all(&paths.state).unwrap();

        ensure_settings_schema_files(&paths).unwrap();

        let schema_text = fs::read_to_string(paths.state.join("settings.schema.json")).unwrap();
        let schema: serde_json::Value = serde_json::from_str(&schema_text).unwrap();
        let schema_text = schema.to_string();
        for key in [
            "selected_model",
            "tools",
            "hooks",
            "custom_providers",
            "mcp_servers",
            "context",
            "tui",
            "skills",
            "subagents",
            "models",
            "instructions",
            "openai_codex",
            "anthropic_cache_ttl",
            "lsp",
            "ttsr",
        ] {
            assert!(schema_text.contains(key), "schema missing {key}");
        }
        assert_eq!(
            read_settings_value(&paths)["$schema"],
            SETTINGS_SCHEMA_RELATIVE_REF
        );
        assert_eq!(read_settings(&paths).unwrap(), Settings::default());
    }

    #[test]
    fn openai_codex_text_verbosity_settings_parse_default_invalid_and_schema() {
        let absent: Settings = serde_json::from_str("{}").unwrap();
        assert_eq!(absent.openai_codex.text_verbosity, TextVerbosity::Low);
        assert!(
            serde_json::to_value(&absent)
                .unwrap()
                .get("openai_codex")
                .is_none()
        );

        let medium: Settings =
            serde_json::from_str(r#"{"openai_codex":{"text_verbosity":"medium"}}"#).unwrap();
        assert_eq!(medium.openai_codex.text_verbosity, TextVerbosity::Medium);
        assert_eq!(
            serde_json::to_value(&medium).unwrap()["openai_codex"]["text_verbosity"],
            "medium"
        );

        let error =
            serde_json::from_str::<Settings>(r#"{"openai_codex":{"text_verbosity":"verbose"}}"#)
                .unwrap_err()
                .to_string();
        assert!(error.contains("expected one of"), "{error}");

        let schema = serde_json::to_string(&schemars::schema_for!(Settings)).unwrap();
        for value in ["openai_codex", "text_verbosity", "low", "medium", "high"] {
            assert!(schema.contains(value), "schema missing {value}: {schema}");
        }
    }

    #[test]
    fn openai_responses_text_verbosity_resolves_shared_and_capability_rules() {
        let mut settings: Settings = serde_json::from_str(
            r#"{
                "openai_responses": {"text_verbosity": "medium"},
                "openai_codex": {"text_verbosity": "high"},
                "custom_providers": {
                    "capable": {
                        "label": "Capable",
                        "base_url": "http://localhost:8080/v1",
                        "use_responses_endpoint": true,
                        "supports_text_verbosity": true
                    },
                    "unsupported": {
                        "label": "Unsupported",
                        "base_url": "http://localhost:8081/v1",
                        "use_responses_endpoint": true
                    }
                }
            }"#,
        )
        .unwrap();
        assert_eq!(
            settings.text_verbosity_for(crate::providers::OPENAI_CODEX_PROVIDER),
            Some(TextVerbosity::Medium)
        );
        assert_eq!(
            settings.text_verbosity_for("capable"),
            Some(TextVerbosity::Medium)
        );
        assert_eq!(settings.text_verbosity_for("unsupported"), None);
        assert_eq!(settings.text_verbosity_for("missing"), None);

        settings.openai_responses.text_verbosity = None;
        assert_eq!(
            settings.text_verbosity_for(crate::providers::OPENAI_CODEX_PROVIDER),
            Some(TextVerbosity::High)
        );
    }

    #[test]
    fn anthropic_cache_ttl_settings_parse_serialize_and_validate_schema() {
        let settings: Settings = serde_json::from_str(r#"{"anthropic_cache_ttl":"1h"}"#).unwrap();
        assert_eq!(
            settings.anthropic_cache_ttl,
            Some(AnthropicCacheTtl::OneHour)
        );
        assert_eq!(
            serde_json::to_value(&settings).unwrap()["anthropic_cache_ttl"],
            "1h"
        );

        let five_minute_settings: Settings =
            serde_json::from_str(r#"{"anthropic_cache_ttl":"5m"}"#).unwrap();
        assert_eq!(
            five_minute_settings.anthropic_cache_ttl,
            Some(AnthropicCacheTtl::FiveMinutes)
        );
        assert_eq!(
            serde_json::to_value(&five_minute_settings).unwrap()["anthropic_cache_ttl"],
            "5m"
        );

        let default_settings: Settings = serde_json::from_str("{}").unwrap();
        assert_eq!(default_settings.anthropic_cache_ttl, None);
        assert!(
            serde_json::to_value(&default_settings)
                .unwrap()
                .get("anthropic_cache_ttl")
                .is_none()
        );
        let schema = serde_json::to_string(&schemars::schema_for!(Settings)).unwrap();
        assert!(schema.contains("anthropic_cache_ttl"), "{schema}");
    }

    #[test]
    fn settings_schema_setup_inserts_schema_for_valid_settings_and_preserves_values() {
        let temp = tempfile::TempDir::new().unwrap();
        let paths = McPaths::from_root(temp.path().join("mc"));
        fs::create_dir_all(&paths.root).unwrap();
        fs::create_dir_all(&paths.state).unwrap();
        fs::write(
            &paths.settings_file,
            r#"{"selected_model":{"provider":"openai-codex","model":"gpt-5.5"},"future_setting":{"keep":true}}"#,
        )
        .unwrap();

        ensure_settings_schema_files(&paths).unwrap();

        let value = read_settings_value(&paths);
        assert_eq!(value["$schema"], SETTINGS_SCHEMA_RELATIVE_REF);
        assert_eq!(value["selected_model"]["provider"], "openai-codex");
        assert_eq!(value["selected_model"]["model"], "gpt-5.5");
        assert_eq!(value["future_setting"]["keep"], true);
    }

    #[test]
    fn settings_schema_setup_preserves_existing_custom_schema() {
        let temp = tempfile::TempDir::new().unwrap();
        let paths = McPaths::from_root(temp.path().join("mc"));
        fs::create_dir_all(&paths.root).unwrap();
        fs::create_dir_all(&paths.state).unwrap();
        fs::write(
            &paths.settings_file,
            r#"{"$schema":"https://example.test/custom.schema.json","selected_model":{"provider":"openai-codex"}}"#,
        )
        .unwrap();

        ensure_settings_schema_files(&paths).unwrap();

        assert_eq!(
            read_settings_value(&paths)["$schema"],
            "https://example.test/custom.schema.json"
        );
    }

    #[test]
    fn settings_schema_setup_leaves_invalid_settings_unchanged() {
        for original in [
            "not json",
            "[]",
            r#"{"selected_model":{"thinking_level":"maximum"}}"#,
            r#"{"custom_providers":{"bad":{"label":"Bad","base_url":"https://provider.test/v1/models"}}}"#,
        ] {
            let temp = tempfile::TempDir::new().unwrap();
            let paths = McPaths::from_root(temp.path().join("mc"));
            fs::create_dir_all(&paths.root).unwrap();
            fs::create_dir_all(&paths.state).unwrap();
            fs::write(&paths.settings_file, original).unwrap();

            ensure_settings_schema_files(&paths).unwrap();

            assert_eq!(fs::read_to_string(&paths.settings_file).unwrap(), original);
        }
    }

    #[test]
    fn settings_write_paths_emit_or_preserve_schema_metadata() {
        let temp = tempfile::TempDir::new().unwrap();
        let paths = McPaths::from_root(temp.path().join("mc"));
        write_settings(
            &paths,
            &Settings {
                selected_model: SelectedModelSettings {
                    provider: Some("openai-codex".to_string()),
                    ..SelectedModelSettings::default()
                },
                ..Settings::default()
            },
        )
        .unwrap();
        let value = read_settings_value(&paths);
        assert_eq!(value["$schema"], SETTINGS_SCHEMA_RELATIVE_REF);
        assert_eq!(value["selected_model"]["provider"], "openai-codex");

        fs::write(
            &paths.settings_file,
            json!({
                "$schema": "https://example.test/custom.schema.json",
                "future_setting": true,
                "selected_model": {"provider":"old-provider"}
            })
            .to_string(),
        )
        .unwrap();
        set_selected_model(&paths, "new-provider", "new-model").unwrap();
        let value = read_settings_value(&paths);
        assert_eq!(value["$schema"], "https://example.test/custom.schema.json");
        assert_eq!(value["future_setting"], true);
        assert_eq!(value["selected_model"]["provider"], "new-provider");
        assert_eq!(value["selected_model"]["model"], "new-model");
    }

    #[test]
    fn settings_update_round_trips_top_level_scalar_context_fields() {
        let temp = tempfile::TempDir::new().unwrap();
        let paths = McPaths::from_root(temp.path().join("mc"));
        fs::create_dir_all(&paths.root).unwrap();
        fs::write(&paths.settings_file, r#"{"future_setting":true}"#).unwrap();

        update_settings_preserving_unknown_top_level_fields(&paths, |settings| {
            settings.no_color = Some(true);
            settings.file_autocomplete_respects_gitignore = false;
            settings.context = serde_json::from_value(json!({"max_tokens": 128000})).unwrap();
        })
        .unwrap();

        let value = read_settings_value(&paths);
        assert_eq!(value["future_setting"], true);
        assert_eq!(value["no_color"], true);
        assert_eq!(value["file_autocomplete_respects_gitignore"], false);
        assert_eq!(value["context"]["max_tokens"], 128000);

        update_settings_preserving_unknown_top_level_fields(&paths, |settings| {
            settings.no_color = None;
            settings.file_autocomplete_respects_gitignore = true;
            settings.context = None;
        })
        .unwrap();

        let value = read_settings_value(&paths);
        assert!(value.get("no_color").is_none());
        assert!(value.get("file_autocomplete_respects_gitignore").is_none());
        assert_eq!(value["context"], serde_json::Value::Null);
    }

    #[test]
    fn settings_update_rejects_invalid_custom_provider_mutation_without_write() {
        let temp = tempfile::TempDir::new().unwrap();
        let paths = McPaths::from_root(temp.path().join("mc"));
        fs::create_dir_all(&paths.root).unwrap();
        fs::write(
            &paths.settings_file,
            r#"{"future_setting":true,"custom_providers":{"local":{"label":"Local","base_url":"http://localhost:8080/v1"}}}"#,
        )
        .unwrap();
        let before = fs::read_to_string(&paths.settings_file).unwrap();

        let error = update_settings_preserving_unknown_top_level_fields(&paths, |settings| {
            settings.custom_providers.get_mut("local").unwrap().base_url =
                "https://user:password@example.test/v1".to_string();
        })
        .unwrap_err()
        .to_string();

        assert!(error.contains("custom provider 'local'"), "{error}");
        assert!(error.contains("userinfo"), "{error}");
        assert!(!error.contains("password"), "{error}");
        assert_eq!(fs::read_to_string(&paths.settings_file).unwrap(), before);
    }

    #[test]
    fn write_settings_rejects_invalid_custom_provider_settings() {
        let temp = tempfile::TempDir::new().unwrap();
        let paths = McPaths::from_root(temp.path().join("mc"));
        let settings = Settings {
            custom_providers: BTreeMap::from([(
                "local".to_string(),
                CustomProviderConfig {
                    label: "Local".to_string(),
                    base_url: "https://user:password@example.test/v1".to_string(),
                    api_key_env_var: None,
                    models_dev_provider: None,
                    use_responses_endpoint: false,
                    supports_text_verbosity: false,
                    reasoning_protocol: crate::config::CustomReasoningProtocol::default(),
                    extra_models: Vec::new(),
                },
            )]),
            ..Settings::default()
        };

        let error = write_settings(&paths, &settings).unwrap_err().to_string();

        assert!(error.contains("custom provider 'local'"), "{error}");
        assert!(error.contains("userinfo"), "{error}");
        assert!(!error.contains("password"), "{error}");
        assert!(!paths.settings_file.exists());
    }

    #[test]
    fn upsert_custom_provider_rejects_invalid_config_without_write() {
        let temp = tempfile::TempDir::new().unwrap();
        let paths = McPaths::from_root(temp.path().join("mc"));
        write_settings(&paths, &Settings::default()).unwrap();
        let before = fs::read_to_string(&paths.settings_file).unwrap();

        let error = upsert_custom_provider(
            &paths,
            "local",
            CustomProviderConfig {
                label: "Local".to_string(),
                base_url: "https://user:password@example.test/v1".to_string(),
                api_key_env_var: None,
                models_dev_provider: None,
                use_responses_endpoint: false,
                supports_text_verbosity: false,
                reasoning_protocol: crate::config::CustomReasoningProtocol::default(),
                extra_models: Vec::new(),
            },
        )
        .unwrap_err()
        .to_string();

        assert!(error.contains("custom provider 'local'"), "{error}");
        assert!(error.contains("userinfo"), "{error}");
        assert!(!error.contains("password"), "{error}");
        assert_eq!(fs::read_to_string(&paths.settings_file).unwrap(), before);
    }

    #[test]
    fn context_model_overrides_parse_serialize_and_validate_keys() {
        let settings: Settings = serde_json::from_str(
            r#"{"context":{"max_tokens":128000,"model_overrides":{"openai-codex/gpt-5.5":{"max_tokens":400000,"reserve_tokens":32768},"zai/Qwen/Qwen3":{"keep_recent_tokens":50000}}}}"#,
        )
        .unwrap();
        let budget = settings.context.as_ref().unwrap();
        let codex = budget.model_overrides.get("openai-codex/gpt-5.5").unwrap();
        assert_eq!(codex.max_tokens, Some(400_000));
        assert_eq!(codex.reserve_tokens, Some(32_768));
        assert_eq!(codex.keep_recent_tokens, None);
        assert_eq!(
            budget
                .model_overrides
                .get("zai/Qwen/Qwen3")
                .unwrap()
                .keep_recent_tokens,
            Some(50_000)
        );
        let serialized = serde_json::to_value(&settings).unwrap();
        assert_eq!(
            serialized["context"]["model_overrides"]["openai-codex/gpt-5.5"]["max_tokens"],
            400000
        );

        for raw in [
            r#"{"context":{"model_overrides":{"missing-slash":{"max_tokens":1}}}}"#,
            r#"{"context":{"model_overrides":{"/missing-provider":{"max_tokens":1}}}}"#,
            r#"{"context":{"model_overrides":{"provider/":{"max_tokens":1}}}}"#,
            r#"{"context":{"model_overrides":{"provider /model":{"max_tokens":1}}}}"#,
            r#"{"context":{"model_overrides":{"provider/model":{}}}}"#,
        ] {
            assert!(parse_validated_settings(raw).is_err(), "accepted {raw}");
        }
    }

    #[test]
    fn settings_deserialize_ignores_schema_metadata() {
        let settings: Settings = serde_json::from_str(
            r#"{"$schema":"./state/settings.schema.json","selected_model":{"provider":"openai-codex"}}"#,
        )
        .unwrap();

        assert_eq!(
            settings.selected_model.provider.as_deref(),
            Some("openai-codex")
        );
    }

    #[test]
    fn instructions_settings_deserialize_additional_markdown_paths() {
        let settings: Settings = serde_json::from_str(
            r#"{"instructions":{"additional_markdown_paths":["/opt/team.md","/Users/test/review.md"]}}"#,
        )
        .unwrap();

        assert!(!settings.instructions.subdir_discovery);
        assert_eq!(
            settings.instructions.additional_markdown_paths,
            vec![
                PathBuf::from("/opt/team.md"),
                PathBuf::from("/Users/test/review.md")
            ]
        );
    }

    #[test]
    fn instructions_settings_deserialize_subdir_discovery() {
        let default_settings: Settings = serde_json::from_str("{}").unwrap();
        assert!(!default_settings.instructions.subdir_discovery);

        let enabled: Settings =
            serde_json::from_str(r#"{"instructions":{"subdir_discovery":true}}"#).unwrap();
        assert!(enabled.instructions.subdir_discovery);
        let serialized = serde_json::to_value(&enabled).unwrap();
        assert_eq!(serialized["instructions"]["subdir_discovery"], true);

        let schema = serde_json::to_string(&schemars::schema_for!(Settings)).unwrap();
        assert!(schema.contains("subdir_discovery"), "{schema}");
    }

    #[test]
    fn skills_settings_deserialize_additional_paths() {
        let settings: Settings = serde_json::from_str(
            r#"{"skills":{"additional_paths":["/opt/magi-skills","/Users/test/skills"]}}"#,
        )
        .unwrap();

        assert_eq!(
            settings.skills.additional_paths,
            vec![
                PathBuf::from("/opt/magi-skills"),
                PathBuf::from("/Users/test/skills")
            ]
        );
    }

    #[test]
    fn normalized_settings_read_canonical_legacy_and_conflicts() {
        let canonical: Settings = serde_json::from_str(
            r#"{
                "selected_model":{"provider":"canonical-provider","model":"canonical-model","thinking_level":"high"},
                "skills":{"disabled":["review"]},
                "integrations":{"herdr":{"enabled":true}}
            }"#,
        )
        .unwrap();
        assert_eq!(
            canonical.selected_model.provider.as_deref(),
            Some("canonical-provider")
        );
        assert_eq!(
            canonical.selected_model.model.as_deref(),
            Some("canonical-model")
        );
        assert_eq!(
            canonical.selected_model.thinking_level,
            Some(ThinkingLevel::High)
        );
        assert_eq!(canonical.skills.disabled, vec!["review"]);
        assert!(canonical.integrations.herdr.enabled);

        let legacy: Settings = serde_json::from_str(
            r#"{
                "provider":"legacy-provider",
                "model":"legacy-model",
                "thinking_level":"medium",
                "disabled_skills":["plan"],
                "herdr":{"enabled":true}
            }"#,
        )
        .unwrap();
        assert_eq!(
            legacy.selected_model.provider.as_deref(),
            Some("legacy-provider")
        );
        assert_eq!(legacy.selected_model.model.as_deref(), Some("legacy-model"));
        assert_eq!(
            legacy.selected_model.thinking_level,
            Some(ThinkingLevel::Medium)
        );
        assert_eq!(legacy.skills.disabled, vec!["plan"]);
        assert!(legacy.integrations.herdr.enabled);

        let conflict: Settings = serde_json::from_str(
            r#"{
                "selected_model":{"provider":"canonical-provider","model":"canonical-model","thinking_level":"low"},
                "provider":"legacy-provider",
                "model":"legacy-model",
                "thinking_level":"high",
                "skills":{"disabled":[]},
                "disabled_skills":["legacy-skill"],
                "integrations":{"herdr":{"enabled":false}},
                "herdr":{"enabled":true}
            }"#,
        )
        .unwrap();
        assert_eq!(
            conflict.selected_model.provider.as_deref(),
            Some("canonical-provider")
        );
        assert_eq!(
            conflict.selected_model.model.as_deref(),
            Some("canonical-model")
        );
        assert_eq!(
            conflict.selected_model.thinking_level,
            Some(ThinkingLevel::Low)
        );
        assert!(conflict.skills.disabled.is_empty());
        assert!(!conflict.integrations.herdr.enabled);
    }

    #[test]
    fn tool_settings_accept_canonical_and_legacy_tool_keys() {
        let canonical: Settings = serde_json::from_str(
            r#"{"tools":{"grep":{"absolute_paths":false},"find":{"absolute_paths":false},"list_files":{"absolute_paths":false},"subagents":{"absolute_paths":false,"max_depth":2}}}"#,
        )
        .unwrap();
        assert!(!canonical.tools.grep.absolute_paths);
        assert!(!canonical.tools.find.absolute_paths);
        assert!(!canonical.tools.list_files.absolute_paths);
        assert!(!canonical.tools.subagents.absolute_paths);
        assert_eq!(canonical.tools.subagents.max_depth, 2);

        let legacy: Settings = serde_json::from_str(
            r#"{"tools":{"ffgrep":{"absolute_paths":false},"fffind":{"absolute_paths":false},"list_files":{"absolute_paths":false},"parallel_subagents":{"absolute_paths":false,"max_depth":3}}}"#,
        )
        .unwrap();
        assert!(!legacy.tools.grep.absolute_paths);
        assert!(!legacy.tools.find.absolute_paths);
        assert!(!legacy.tools.list_files.absolute_paths);
        assert!(!legacy.tools.subagents.absolute_paths);
        assert_eq!(legacy.tools.subagents.max_depth, 3);
    }

    #[test]
    fn normalized_settings_default_serialization_omits_empty_groups() {
        let value = serde_json::to_value(Settings::default()).unwrap();
        assert!(value.get("selected_model").is_none());
        assert!(value.get("integrations").is_none());
        assert!(value.get("instructions").is_none());
        assert!(value.get("skills").is_none());
    }

    #[test]
    fn normalized_settings_update_preserves_nested_unknowns_and_removes_legacy_keys() {
        let temp = tempfile::TempDir::new().unwrap();
        let paths = McPaths::from_root(temp.path().join("mc"));
        fs::create_dir_all(&paths.root).unwrap();
        fs::write(
            &paths.settings_file,
            r#"{
                "future_setting":true,
                "provider":"legacy-provider",
                "model":"legacy-model",
                "thinking_level":"high",
                "disabled_skills":["legacy-skill"],
                "herdr":{"enabled":true,"legacy_future":"keep"},
                "selected_model":{"provider":"canonical-provider","future":"keep"},
                "instructions":{"additional_markdown_paths":["/opt/team.md"],"future":"keep"},
                "skills":{"additional_paths":["/opt/skills"],"future":"keep"},
                "integrations":{"future":"keep","herdr":{"enabled":false,"future":"keep"}},
                "tui":{"future":"keep"}
            }"#,
        )
        .unwrap();

        set_selected_model(&paths, "new-provider", "new-model").unwrap();
        let value: serde_json::Value =
            serde_json::from_str(&fs::read_to_string(&paths.settings_file).unwrap()).unwrap();
        assert_eq!(value["future_setting"], true);
        assert_eq!(value["selected_model"]["provider"], "new-provider");
        assert_eq!(value["selected_model"]["model"], "new-model");
        assert_eq!(value["selected_model"]["thinking_level"], "high");
        assert_eq!(value["selected_model"]["future"], "keep");
        assert_eq!(
            value["instructions"]["additional_markdown_paths"][0],
            "/opt/team.md"
        );
        assert_eq!(value["instructions"]["future"], "keep");
        assert_eq!(value["skills"]["disabled"][0], "legacy-skill");
        assert_eq!(value["skills"]["future"], "keep");
        assert_eq!(value["integrations"]["future"], "keep");
        assert_eq!(value["integrations"]["herdr"]["enabled"], false);
        assert_eq!(value["integrations"]["herdr"]["future"], "keep");
        assert_eq!(value["tui"]["future"], "keep");
        for legacy_key in [
            "provider",
            "model",
            "thinking_level",
            "disabled_skills",
            "herdr",
        ] {
            assert!(
                value.get(legacy_key).is_none(),
                "legacy key survived: {legacy_key}"
            );
        }
    }

    #[test]
    fn settings_update_treats_repo_map_as_known_tool_key() {
        let mut raw = json!({
            "tools": {"repo_map": {"absolute_paths": true}},
            "selected_primary_agent": "old"
        });
        let mut settings: Settings = serde_json::from_value(raw.clone()).unwrap();
        settings.selected_primary_agent = Some("new".to_string());

        update_raw_from_settings(&mut raw, &settings, SettingsScope::Global).unwrap();

        assert!(raw.get("tools").is_none());
        assert_eq!(raw["selected_primary_agent"], "new");
        assert!(KNOWN_TOOL_KEYS.contains(&"repo_map"));
    }

    #[test]
    fn hook_settings_preserve_unknown_fields_on_settings_update() {
        let temp = tempfile::TempDir::new().unwrap();
        let paths = McPaths::from_root(temp.path().join("mc"));
        fs::create_dir_all(&paths.root).unwrap();
        fs::write(
            &paths.settings_file,
            r#"{"hooks":{"future":{"keep":true}}}"#,
        )
        .unwrap();

        set_selected_model(&paths, "provider", "model").unwrap();

        let value = read_settings_value(&paths);
        assert_eq!(value["hooks"]["future"]["keep"], true);
        assert_eq!(value["selected_model"]["provider"], "provider");
        assert_eq!(value["selected_model"]["model"], "model");
    }

    #[test]
    fn hook_settings_default_without_unknown_fields_is_omitted_on_settings_update() {
        let temp = tempfile::TempDir::new().unwrap();
        let paths = McPaths::from_root(temp.path().join("mc"));
        fs::create_dir_all(&paths.root).unwrap();
        fs::write(&paths.settings_file, r#"{}"#).unwrap();

        set_selected_model(&paths, "provider", "model").unwrap();

        let value = read_settings_value(&paths);
        assert!(value.get("hooks").is_none());
    }

    #[test]
    fn hook_settings_known_fields_override_old_raw_values_on_settings_update() {
        let temp = tempfile::TempDir::new().unwrap();
        let paths = McPaths::from_root(temp.path().join("mc"));
        fs::create_dir_all(&paths.root).unwrap();
        fs::write(
            &paths.settings_file,
            r#"{"hooks":{"enabled":false,"future":{"keep":true}}}"#,
        )
        .unwrap();

        update_settings_preserving_unknown_top_level_fields(&paths, |settings| {
            settings.hooks.enabled = true;
        })
        .unwrap();

        let value = read_settings_value(&paths);
        assert_eq!(value["hooks"]["enabled"], true);
        assert_eq!(value["hooks"]["future"]["keep"], true);
    }

    #[test]
    fn settings_read_defaults_only_when_file_is_missing() {
        let temp = tempfile::TempDir::new().unwrap();
        let paths = McPaths::from_root(temp.path().join("mc"));
        assert_eq!(read_settings(&paths).unwrap(), Settings::default());
        fs::create_dir_all(&paths.root).unwrap();
        fs::create_dir(&paths.settings_file).unwrap();

        let error = read_settings(&paths).unwrap_err().to_string();

        assert!(error.contains("failed to read"), "{error}");
    }

    fn paths_with_local_settings(temp: &tempfile::TempDir) -> (McPaths, PathBuf) {
        let mut paths = McPaths::from_root(temp.path().join("mc"));
        let local_settings = temp.path().join("project/.magi-code/settings.json");
        paths.project_settings_file = local_settings.clone();
        paths.local_settings_file = Some(local_settings.clone());
        fs::create_dir_all(&paths.root).unwrap();
        fs::create_dir_all(local_settings.parent().unwrap()).unwrap();
        (paths, local_settings)
    }

    #[test]
    fn deep_merge_json_recurses_objects_and_replaces_non_objects() {
        let mut base = json!({
            "object": {"keep": true, "replace": {"old": true}},
            "array": ["a"],
            "scalar": true
        });
        let override_val = json!({
            "object": {"replace": {"new": true}},
            "array": ["b"],
            "scalar": null
        });

        deep_merge_json(&mut base, &override_val);

        assert_eq!(base["object"]["keep"], true);
        assert_eq!(base["object"]["replace"], json!({"old": true, "new": true}));
        assert_eq!(base["array"], json!(["b"]));
        assert_eq!(base["scalar"], serde_json::Value::Null);
    }

    #[test]
    fn read_settings_local_scalar_overrides_global() {
        let temp = tempfile::TempDir::new().unwrap();
        let (paths, local_settings) = paths_with_local_settings(&temp);
        fs::write(&paths.settings_file, r#"{"no_color":true}"#).unwrap();
        fs::write(&local_settings, r#"{"no_color":false}"#).unwrap();

        let settings = read_settings(&paths).unwrap();

        assert_eq!(settings.no_color, Some(false));
    }

    #[test]
    fn read_settings_local_omission_keeps_global_nested_values() {
        let temp = tempfile::TempDir::new().unwrap();
        let (paths, local_settings) = paths_with_local_settings(&temp);
        fs::write(
            &paths.settings_file,
            r#"{"tools":{"read":{"absolute_paths":false}}}"#,
        )
        .unwrap();
        fs::write(&local_settings, r#"{"no_color":true}"#).unwrap();

        let settings = read_settings(&paths).unwrap();

        assert!(!settings.tools.read.absolute_paths);
        assert_eq!(settings.no_color, Some(true));
    }

    #[test]
    fn read_settings_local_map_union_and_key_override() {
        let temp = tempfile::TempDir::new().unwrap();
        let (paths, local_settings) = paths_with_local_settings(&temp);
        fs::write(
            &paths.settings_file,
            r#"{"mcp_servers":{"server1":{"type":"stdio","command":"global"}}}"#,
        )
        .unwrap();
        fs::write(
            &local_settings,
            r#"{"mcp_servers":{"server1":{"type":"stdio","command":"local"},"server2":{"type":"stdio","command":"second"}}}"#,
        )
        .unwrap();

        let settings = read_settings(&paths).unwrap();

        assert_eq!(settings.mcp_servers.len(), 2);
        let McpServerConfig::Stdio(server1) = settings.mcp_servers.get("server1").unwrap() else {
            panic!("expected stdio server1");
        };
        let McpServerConfig::Stdio(server2) = settings.mcp_servers.get("server2").unwrap() else {
            panic!("expected stdio server2");
        };
        assert_eq!(server1.command, "local");
        assert_eq!(server2.command, "second");
    }

    #[test]
    fn read_settings_local_vec_replaces_global_vec() {
        let temp = tempfile::TempDir::new().unwrap();
        let (paths, local_settings) = paths_with_local_settings(&temp);
        fs::write(
            &paths.settings_file,
            r#"{"skills":{"additional_paths":["a"]}}"#,
        )
        .unwrap();
        fs::write(&local_settings, r#"{"skills":{"additional_paths":["b"]}}"#).unwrap();

        let settings = read_settings(&paths).unwrap();

        assert_eq!(settings.skills.additional_paths, vec![PathBuf::from("b")]);
    }

    #[test]
    fn scoped_project_update_creates_exact_cwd_settings_and_preserves_unknowns() {
        let temp = tempfile::TempDir::new().unwrap();
        let mut paths = McPaths::from_root(temp.path().join("mc"));
        paths.project_settings_file = temp.path().join("project/.magi-code/settings.json");
        fs::create_dir_all(paths.project_settings_file.parent().unwrap()).unwrap();
        fs::write(
            &paths.project_settings_file,
            r#"{"future":true,"tools":{"future_tool":true},"subagents":{"future_subagent":true}}"#,
        )
        .unwrap();

        set_tool_disabled(&paths, SettingsScope::Project, "bash", true).unwrap();
        set_subagent_profile_disabled(&paths, SettingsScope::Project, "reviewer", true).unwrap();

        let value: serde_json::Value =
            serde_json::from_str(&fs::read_to_string(&paths.project_settings_file).unwrap())
                .unwrap();
        assert_eq!(value["future"], true);
        assert_eq!(value["tools"]["future_tool"], true);
        assert_eq!(value["tools"]["disabled"], json!(["bash"]));
        assert_eq!(value["subagents"]["future_subagent"], true);
        assert_eq!(value["subagents"]["disabled"], json!(["reviewer"]));
        assert!(value.get("$schema").is_none());
    }

    #[test]
    fn project_disabled_empty_list_overrides_global_disabled() {
        let temp = tempfile::TempDir::new().unwrap();
        let mut paths = McPaths::from_root(temp.path().join("mc"));
        paths.project_settings_file = temp.path().join("project/.magi-code/settings.json");
        fs::create_dir_all(&paths.root).unwrap();
        fs::create_dir_all(paths.project_settings_file.parent().unwrap()).unwrap();
        fs::write(&paths.settings_file, r#"{"tools":{"disabled":["bash"]}}"#).unwrap();

        set_tool_disabled(&paths, SettingsScope::Project, "bash", false).unwrap();

        let local: serde_json::Value =
            serde_json::from_str(&fs::read_to_string(&paths.project_settings_file).unwrap())
                .unwrap();
        assert_eq!(local["tools"]["disabled"], json!([]));
        assert!(disabled_tool_names_from_settings(&read_settings(&paths).unwrap()).is_empty());
    }

    #[test]
    fn scoped_project_update_rejects_magi_code_symlink_escape() {
        let temp = tempfile::TempDir::new().unwrap();
        let mut paths = McPaths::from_root(temp.path().join("mc"));
        let project = temp.path().join("project");
        let outside = temp.path().join("outside");
        fs::create_dir_all(&project).unwrap();
        fs::create_dir_all(&outside).unwrap();
        #[cfg(unix)]
        std::os::unix::fs::symlink(&outside, project.join(".magi-code")).unwrap();
        #[cfg(windows)]
        std::os::windows::fs::symlink_dir(&outside, project.join(".magi-code")).unwrap();
        paths.project_settings_file = project.join(".magi-code/settings.json");

        let error = set_skill_disabled_for_scope(&paths, SettingsScope::Project, "review", true)
            .unwrap_err()
            .to_string();

        assert!(error.contains("escapes cwd"), "{error}");
    }

    #[test]
    fn project_modal_scope_inherits_effective_until_local_list_exists() {
        let temp = tempfile::TempDir::new().unwrap();
        let mut paths = McPaths::from_root(temp.path().join("mc"));
        paths.project_settings_file = temp.path().join("project/.magi-code/settings.json");
        fs::create_dir_all(&paths.root).unwrap();
        fs::write(&paths.settings_file, r#"{"skills":{"disabled":["audit"]}}"#).unwrap();

        let inherited = disabled_names_for_modal_scope(
            &paths,
            SettingsScope::Project,
            SettingsListKind::Skills,
        )
        .unwrap();

        assert!(inherited.contains("audit"));
        assert!(!paths.project_settings_file.exists());
    }

    #[test]
    fn project_update_does_not_serialize_full_default_tools_block() {
        let temp = tempfile::TempDir::new().unwrap();
        let mut paths = McPaths::from_root(temp.path().join("mc"));
        paths.project_settings_file = temp.path().join("project/.magi-code/settings.json");
        fs::create_dir_all(paths.project_settings_file.parent().unwrap()).unwrap();

        set_tool_disabled(&paths, SettingsScope::Project, "bash", true).unwrap();

        let value: serde_json::Value =
            serde_json::from_str(&fs::read_to_string(&paths.project_settings_file).unwrap())
                .unwrap();
        assert_eq!(value["tools"]["disabled"], json!(["bash"]));
        assert!(value["tools"].get("read").is_none());
        assert!(value["tools"].get("subagents").is_none());
    }

    #[test]
    fn read_settings_for_scope_reads_only_target_file() {
        let temp = tempfile::TempDir::new().unwrap();
        let (paths, local_settings) = paths_with_local_settings(&temp);
        fs::write(&paths.settings_file, r#"{"no_color":true}"#).unwrap();
        fs::write(&local_settings, r#"{"no_color":false}"#).unwrap();

        assert_eq!(
            read_settings_for_scope(&paths, SettingsScope::Global)
                .unwrap()
                .no_color,
            Some(true)
        );
        assert_eq!(
            read_settings_for_scope(&paths, SettingsScope::Project)
                .unwrap()
                .no_color,
            Some(false)
        );
    }

    #[test]
    fn read_settings_accepts_local_only_settings() {
        let temp = tempfile::TempDir::new().unwrap();
        let (paths, local_settings) = paths_with_local_settings(&temp);
        fs::write(&local_settings, r#"{"no_color":true}"#).unwrap();

        let settings = read_settings(&paths).unwrap();

        assert_eq!(settings.no_color, Some(true));
    }

    #[test]
    fn read_settings_keeps_global_when_local_is_empty_or_missing() {
        let temp = tempfile::TempDir::new().unwrap();
        let (paths, local_settings) = paths_with_local_settings(&temp);
        fs::write(&paths.settings_file, r#"{"no_color":true}"#).unwrap();
        fs::write(&local_settings, r#"{}"#).unwrap();

        assert_eq!(read_settings(&paths).unwrap().no_color, Some(true));
        fs::remove_file(&local_settings).unwrap();
        assert_eq!(read_settings(&paths).unwrap().no_color, Some(true));
    }

    #[test]
    fn read_settings_invalid_local_json_error_names_local_path() {
        let temp = tempfile::TempDir::new().unwrap();
        let (paths, local_settings) = paths_with_local_settings(&temp);
        fs::write(&paths.settings_file, r#"{"no_color":true}"#).unwrap();
        fs::write(&local_settings, "not json").unwrap();

        let error = read_settings(&paths).unwrap_err().to_string();

        assert!(
            error.contains(&local_settings.display().to_string()),
            "{error}"
        );
    }

    #[test]
    fn write_settings_writes_global_only_when_local_settings_exists() {
        let temp = tempfile::TempDir::new().unwrap();
        let (paths, local_settings) = paths_with_local_settings(&temp);
        fs::write(&local_settings, r#"{"no_color":false}"#).unwrap();
        let local_before = fs::read_to_string(&local_settings).unwrap();

        write_settings(
            &paths,
            &Settings {
                no_color: Some(true),
                ..Settings::default()
            },
        )
        .unwrap();

        assert_eq!(fs::read_to_string(&local_settings).unwrap(), local_before);
        assert_eq!(read_settings_value(&paths)["no_color"], true);
    }

    #[test]
    fn concurrent_settings_updates_preserve_independent_fields() {
        let temp = tempfile::TempDir::new().unwrap();
        let paths = McPaths::from_root(temp.path().join("mc"));
        let left = paths.clone();
        let right = paths.clone();
        let left = std::thread::spawn(move || {
            update_settings_preserving_unknown_top_level_fields(&left, |settings| {
                settings.selected_model.provider = Some("provider-a".to_string());
            })
            .unwrap();
        });
        let right = std::thread::spawn(move || {
            update_settings_preserving_unknown_top_level_fields(&right, |settings| {
                settings.session_titles = SessionTitleSettings {
                    enabled: true,
                    provider: Some("title-provider".to_string()),
                    model: Some("title-model".to_string()),
                };
            })
            .unwrap();
        });
        left.join().unwrap();
        right.join().unwrap();

        let settings = read_settings(&paths).unwrap();
        assert_eq!(
            settings.selected_model.provider.as_deref(),
            Some("provider-a")
        );
        assert!(settings.session_titles.enabled);
        assert_eq!(
            settings.session_titles.provider.as_deref(),
            Some("title-provider")
        );
        assert_eq!(
            settings.session_titles.model.as_deref(),
            Some("title-model")
        );
    }

    #[test]
    fn mcp_servers_parse_defaults_validate_and_serialize() {
        let settings: Settings = serde_json::from_str(
            r#"{"mcp_servers":{"mock":{"type":"stdio","command":"node","args":["server.js"],"env":{},"enabled":true,"timeout":30}}}"#,
        )
        .unwrap();
        let config = settings.mcp_servers.get("mock").unwrap();
        match config {
            McpServerConfig::Stdio(stdio) => {
                assert_eq!(stdio.command, "node");
                assert_eq!(stdio.args, vec!["server.js"]);
                assert!(stdio.env.is_empty());
                assert!(stdio.enabled);
                assert_eq!(stdio.timeout, Some(30));
            }
            McpServerConfig::Http(_) => panic!("expected stdio config"),
        }

        let absent: Settings = serde_json::from_str("{}").unwrap();
        assert!(absent.mcp_servers.is_empty());
        let serialized = serde_json::to_value(settings).unwrap();
        assert_eq!(serialized["mcp_servers"]["mock"]["type"], "stdio");
    }

    #[test]
    fn mcp_http_servers_parse_defaults_validate_serialize_and_redact_debug() {
        let settings: Settings = serde_json::from_str(
            r#"{"mcp_servers":{"remote":{"type":"http","url":"https://mcp.example.test/mcp?token=url-secret#frag","headers":{"Authorization":"{env:MCP_TOKEN}","X-Team":"platform"}}}}"#,
        )
        .unwrap();
        let config = settings.mcp_servers.get("remote").unwrap();
        match config {
            McpServerConfig::Http(http) => {
                assert_eq!(
                    http.url,
                    "https://mcp.example.test/mcp?token=url-secret#frag"
                );
                assert!(http.enabled);
                assert_eq!(http.timeout, None);
                assert_eq!(http.headers["Authorization"], "{env:MCP_TOKEN}");
                assert!(http.oauth.is_none());
                let debug = format!("{http:?}");
                assert!(debug.contains("[REDACTED]"), "{debug}");
                assert!(!debug.contains("platform"), "{debug}");
                assert!(!debug.contains("MCP_TOKEN"), "{debug}");
                assert!(!debug.contains("url-secret"), "{debug}");
                assert!(!debug.contains("token="), "{debug}");
            }
            McpServerConfig::Stdio(_) => panic!("expected http config"),
        }
        let serialized = serde_json::to_value(settings).unwrap();
        assert_eq!(serialized["mcp_servers"]["remote"]["type"], "http");
    }

    #[test]
    fn mcp_http_servers_reject_invalid_url_headers_and_timeout() {
        for raw in [
            r#"{"mcp_servers":{"remote":{"type":"http","url":"ftp://mcp.example.test/mcp"}}}"#,
            r#"{"mcp_servers":{"remote":{"type":"http","url":"https://user:pass@mcp.example.test/mcp"}}}"#,
            r#"{"mcp_servers":{"remote":{"type":"http","url":"https://mcp.example.test/mcp","headers":{"Bad:Name":"x"}}}}"#,
            r#"{"mcp_servers":{"remote":{"type":"http","url":"https://mcp.example.test/mcp","headers":{"Authorization":"literal"}}}}"#,
            r#"{"mcp_servers":{"remote":{"type":"http","url":"https://mcp.example.test/mcp","headers":{"Authorization":"{env:1BAD}"}}}}"#,
            r#"{"mcp_servers":{"remote":{"type":"http","url":"https://mcp.example.test/mcp","timeout":301}}}"#,
        ] {
            assert!(parse_validated_settings(raw).is_err(), "accepted {raw}");
        }

        for raw in [
            r#"{"mcp_servers":{"local":{"type":"http","url":"http://localhost:8787/mcp"}}}"#,
            r#"{"mcp_servers":{"local":{"type":"http","url":"http://127.0.0.1:8787/mcp"}}}"#,
            r#"{"mcp_servers":{"local":{"type":"http","url":"http://127.0.0.2:8787/mcp"}}}"#,
            r#"{"mcp_servers":{"local":{"type":"http","url":"http://[::1]:8787/mcp"}}}"#,
        ] {
            assert!(parse_validated_settings(raw).is_ok(), "rejected {raw}");
        }
        let remote =
            r#"{"mcp_servers":{"remote":{"type":"http","url":"http://mcp.example.test/mcp"}}}"#;
        assert!(
            parse_validated_settings(remote).is_err(),
            "accepted {remote}"
        );

        let userinfo = r#"{"mcp_servers":{"remote":{"type":"http","url":"https://user:pass@mcp.example.test/mcp"}}}"#;
        assert!(
            parse_validated_settings(userinfo).is_err(),
            "accepted {userinfo}"
        );
    }
    #[test]
    fn mcp_http_oauth_config_parses_validates_serializes_and_redacts_debug() {
        let settings: Settings = serde_json::from_str(
            r#"{"mcp_servers":{"remote":{"type":"http","url":"https://mcp.example.test/mcp","headers":{"X-Team":"platform"},"oauth":{"client_id":"public-client","scopes":["search","offline_access"],"authorization_server":"https://auth.example.test"}}}}"#,
        )
        .unwrap();
        let config = settings.mcp_servers.get("remote").unwrap();
        let McpServerConfig::Http(http) = config else {
            panic!("expected http config");
        };
        let oauth = http.oauth.as_ref().unwrap();
        assert_eq!(oauth.client_id.as_deref(), Some("public-client"));
        assert_eq!(oauth.scopes, vec!["search", "offline_access"]);
        assert_eq!(
            oauth.authorization_server.as_deref(),
            Some("https://auth.example.test")
        );
        let debug = format!("{oauth:?}");
        assert!(debug.contains("[REDACTED]"), "{debug}");
        assert!(!debug.contains("public-client"), "{debug}");

        let serialized = serde_json::to_value(settings).unwrap();
        assert_eq!(
            serialized["mcp_servers"]["remote"]["oauth"]["client_id"],
            "public-client"
        );
    }

    #[test]
    fn mcp_http_oauth_rejects_authorization_headers_and_invalid_fields() {
        for raw in [
            r#"{"mcp_servers":{"remote":{"type":"http","url":"https://mcp.example.test/mcp","headers":{"Authorization":"{env:MCP_TOKEN}"},"oauth":{}}}}"#,
            r#"{"mcp_servers":{"remote":{"type":"http","url":"https://mcp.example.test/mcp","headers":{"Proxy-Authorization":"{env:MCP_TOKEN}"},"oauth":{}}}}"#,
            r#"{"mcp_servers":{"remote":{"type":"http","url":"https://mcp.example.test/mcp","oauth":{"client_id":" "}}}}"#,
            r#"{"mcp_servers":{"remote":{"type":"http","url":"https://mcp.example.test/mcp","oauth":{"scopes":[""]}}}}"#,
            r#"{"mcp_servers":{"remote":{"type":"http","url":"https://mcp.example.test/mcp","oauth":{"scopes":["bad\u0007scope"]}}}}"#,
        ] {
            assert!(parse_validated_settings(raw).is_err(), "accepted {raw}");
        }

        for raw in [
            r#"{"mcp_servers":{"local":{"type":"http","url":"http://localhost:8787/mcp","oauth":{"authorization_server":"http://localhost:8788"}}}}"#,
            r#"{"mcp_servers":{"local":{"type":"http","url":"http://127.0.0.1:8787/mcp","oauth":{"authorization_server":"http://127.0.0.2:8788"}}}}"#,
        ] {
            assert!(parse_validated_settings(raw).is_ok(), "rejected {raw}");
        }
        let remote = r#"{"mcp_servers":{"remote":{"type":"http","url":"https://mcp.example.test/mcp","oauth":{"authorization_server":"http://auth.example.test"}}}}"#;
        assert!(
            parse_validated_settings(remote).is_err(),
            "accepted {remote}"
        );
    }

    #[test]
    fn settings_schema_generation_includes_mcp_http_config() {
        let schema = schemars::schema_for!(Settings);
        let schema_text = serde_json::to_string(&schema).unwrap();
        assert!(schema_text.contains("McpHttpServerConfig"), "{schema_text}");
        assert!(schema_text.contains("url"), "{schema_text}");
        assert!(schema_text.contains("headers"), "{schema_text}");
        assert!(schema_text.contains("McpOAuthConfig"), "{schema_text}");
        assert!(schema_text.contains("client_id"), "{schema_text}");
        assert!(schema_text.contains("scopes"), "{schema_text}");
        assert!(
            schema_text.contains("authorization_server"),
            "{schema_text}"
        );
    }

    #[test]
    fn mcp_servers_reject_invalid_names_command_and_timeout() {
        for raw in [
            r#"{"mcp_servers":{"bad/name":{"type":"stdio","command":"node"}}}"#,
            r#"{"mcp_servers":{"bad__name":{"type":"stdio","command":"node"}}}"#,
            r#"{"mcp_servers":{"mock":{"type":"stdio","command":" "}}}"#,
            r#"{"mcp_servers":{"mock":{"type":"stdio","command":"node","timeout":0}}}"#,
            r#"{"mcp_servers":{"mock":{"type":"stdio","command":"node","timeout":301}}}"#,
        ] {
            assert!(parse_validated_settings(raw).is_err(), "accepted {raw}");
        }
    }

    #[test]
    fn lsp_settings_parse_defaults_validate_and_serialize() {
        let absent: Settings = serde_json::from_str("{}").unwrap();
        assert_eq!(absent.lsp, LspSettings::default());
        assert!(!absent.lsp.enabled);
        assert!(absent.lsp.inject_diagnostics_on_edit);
        assert_eq!(
            absent.lsp.diagnostics_wait_ms,
            DEFAULT_LSP_DIAGNOSTICS_WAIT_MS
        );
        assert_eq!(
            absent.lsp.idle_shutdown_minutes,
            DEFAULT_LSP_IDLE_SHUTDOWN_MINUTES
        );
        assert!(serde_json::to_value(&absent).unwrap().get("lsp").is_none());

        let settings: Settings = serde_json::from_str(
            r#"{"lsp":{"enabled":true,"inject_diagnostics_on_edit":false,"diagnostics_wait_ms":1500,"idle_shutdown_minutes":30,"servers":{"rust-analyzer":{"command":"rust-analyzer","args":["--log-file","ra.log"],"enabled":false}}}}"#,
        )
        .unwrap();
        validate_settings(&settings).unwrap();
        assert!(settings.lsp.enabled);
        assert!(!settings.lsp.inject_diagnostics_on_edit);
        assert_eq!(settings.lsp.diagnostics_wait_ms, 1500);
        assert_eq!(settings.lsp.idle_shutdown_minutes, 30);
        let rust_analyzer = settings.lsp.servers.get("rust-analyzer").unwrap();
        assert_eq!(rust_analyzer.command, "rust-analyzer");
        assert_eq!(rust_analyzer.args, vec!["--log-file", "ra.log"]);
        assert!(!rust_analyzer.enabled);

        let serialized = serde_json::to_value(settings).unwrap();
        assert_eq!(serialized["lsp"]["enabled"], true);
        assert_eq!(
            serialized["lsp"]["servers"]["rust-analyzer"]["command"],
            "rust-analyzer"
        );
    }

    #[test]
    fn lsp_settings_reject_invalid_values() {
        for raw in [
            r#"{"lsp":{"diagnostics_wait_ms":0}}"#,
            r#"{"lsp":{"diagnostics_wait_ms":30001}}"#,
            r#"{"lsp":{"idle_shutdown_minutes":0}}"#,
            r#"{"lsp":{"idle_shutdown_minutes":241}}"#,
            r#"{"lsp":{"servers":{"":{"command":"rust-analyzer"}}}}"#,
            r#"{"lsp":{"servers":{"bad__name":{"command":"rust-analyzer"}}}}"#,
            r#"{"lsp":{"servers":{"rust-analyzer":{"command":" "}}}}"#,
        ] {
            assert!(parse_validated_settings(raw).is_err(), "accepted {raw}");
        }
    }

    #[test]
    fn lsp_settings_preserved_and_removed_by_settings_update() {
        let mut raw = json!({
            "lsp": {
                "enabled": true,
                "servers": {"rust-analyzer": {"command": "rust-analyzer"}}
            },
            "selected_primary_agent": "old"
        });
        let mut settings: Settings = serde_json::from_value(raw.clone()).unwrap();
        settings.selected_primary_agent = Some("new".to_string());

        update_raw_from_settings(&mut raw, &settings, SettingsScope::Global).unwrap();

        assert_eq!(raw["lsp"]["enabled"], true);
        assert_eq!(
            raw["lsp"]["servers"]["rust-analyzer"]["command"],
            "rust-analyzer"
        );
        assert_eq!(raw["selected_primary_agent"], "new");

        settings.lsp = LspSettings::default();
        update_raw_from_settings(&mut raw, &settings, SettingsScope::Global).unwrap();
        assert!(raw.get("lsp").is_none());
    }

    #[test]
    fn mcp_servers_preserved_by_settings_update() {
        let temp = tempfile::TempDir::new().unwrap();
        let paths = McPaths::from_root(temp.path().join("mc"));
        fs::create_dir_all(&paths.root).unwrap();
        fs::write(
            &paths.settings_file,
            r#"{"mcp_servers":{"mock":{"type":"stdio","command":"node","args":["server.js"],"env":{},"enabled":true,"timeout":30}},"future_setting":true}"#,
        )
        .unwrap();

        set_selected_model(&paths, "provider", "model").unwrap();

        let value: serde_json::Value =
            serde_json::from_str(&fs::read_to_string(&paths.settings_file).unwrap()).unwrap();
        assert_eq!(value["mcp_servers"]["mock"]["command"], "node");
        assert_eq!(value["future_setting"], true);
    }

    #[test]
    fn set_mcp_server_enabled_updates_stdio_http_and_preserves_unknowns() {
        let temp = tempfile::TempDir::new().unwrap();
        let paths = McPaths::from_root(temp.path().join("mc"));
        fs::create_dir_all(&paths.root).unwrap();
        fs::write(
            &paths.settings_file,
            r#"{
                "future_setting":{"keep":true},
                "mcp_servers":{
                    "mock":{"type":"stdio","command":"node","enabled":true},
                    "remote":{"type":"http","url":"https://mcp.example.test/mcp","enabled":false}
                }
            }"#,
        )
        .unwrap();

        set_mcp_server_enabled(&paths, "mock", false).unwrap();
        set_mcp_server_enabled(&paths, "remote", true).unwrap();

        let value = read_settings_value(&paths);
        assert_eq!(value["future_setting"]["keep"], true);
        assert_eq!(value["mcp_servers"]["mock"]["enabled"], false);
        assert_eq!(value["mcp_servers"]["remote"]["enabled"], true);
    }

    #[test]
    fn set_mcp_server_enabled_rejects_missing_or_invalid_name() {
        let temp = tempfile::TempDir::new().unwrap();
        let paths = McPaths::from_root(temp.path().join("mc"));
        fs::create_dir_all(&paths.root).unwrap();
        fs::write(&paths.settings_file, r#"{"mcp_servers":{}}"#).unwrap();

        let missing = set_mcp_server_enabled(&paths, "missing", true)
            .unwrap_err()
            .to_string();
        assert!(
            missing.contains("mcp server not found: missing"),
            "{missing}"
        );

        let invalid = set_mcp_server_enabled(&paths, "bad/name", true)
            .unwrap_err()
            .to_string();
        assert!(invalid.contains("mcp server name"), "{invalid}");
    }

    #[test]
    fn herdr_settings_default_enabled_and_unknown_fields() {
        let absent: Settings = serde_json::from_str("{}").unwrap();
        assert!(absent.integrations.herdr.is_default());
        assert!(!absent.integrations.herdr.enabled);

        let enabled: Settings =
            serde_json::from_str(r#"{"integrations":{"herdr":{"enabled":true,"future":"kept"}}}"#)
                .unwrap();
        assert!(enabled.integrations.herdr.enabled);
        let value = serde_json::to_value(&enabled).unwrap();
        assert_eq!(value["integrations"]["herdr"]["enabled"], true);
        assert_eq!(value["integrations"]["herdr"]["future"], "kept");

        let default_value = serde_json::to_value(Settings::default()).unwrap();
        assert!(default_value.get("integrations").is_none());
    }
}