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use super::turn_context::TurnContext;
use crate::config::Config;
use crate::config::TokenBudgetConfig;
use crate::config::resolve_token_budget_config;
use crate::context::ContextualUserFragment;
use codex_features::Feature;
use codex_login::CodexAuth;
use codex_protocol::account::PlanType;
use codex_protocol::auth::AuthMode;
use codex_protocol::openai_models::ModelInfo;
fn experimental_context_is_eligible(auth_mode: AuthMode, plan_type: Option<PlanType>) -> bool {
auth_mode == AuthMode::Chatgpt
&& matches!(
plan_type,
Some(PlanType::Plus | PlanType::Pro | PlanType::ProLite)
)
}
pub(super) fn apply_experimental_context(
config: &mut Config,
auth: Option<&CodexAuth>,
starting_model: &ModelInfo,
) -> std::io::Result<()> {
let provider = &config.model_provider;
if !config.features.enabled(Feature::ContextManagement)
|| !starting_model.supports_experimental_context
|| !provider.supports_codex_backend_routes()
|| !provider.requires_openai_auth
|| provider.env_key.is_some()
|| provider.experimental_bearer_token.is_some()
|| provider.auth.is_some()
|| provider.aws.is_some()
|| !auth.is_some_and(|auth| {
experimental_context_is_eligible(auth.auth_mode(), auth.account_plan_type())
})
|| config.features.enable(Feature::TokenBudget).is_err()
|| !config.features.enabled(Feature::TokenBudget)
{
return Ok(());
}
if config.token_budget.is_none() {
let config_toml = config
.config_layer_stack
.effective_config()
.try_into()
.map_err(|err| std::io::Error::new(std::io::ErrorKind::InvalidData, err))?;
config.token_budget = resolve_token_budget_config(&config_toml, &config.features)?;
}
config
.token_budget
.get_or_insert_default()
.use_history_notes_extension = true;
Ok(())
}
/// Detects explicit preferences before model defaults are applied to the turn config.
pub(super) fn has_explicit_settings(config: &Config) -> bool {
config
.config_layer_stack
.effective_config()
.get("features")
.and_then(|features| features.get("token_budget"))
.and_then(|token_budget| token_budget.as_table())
.is_some_and(|settings| {
settings
.keys()
.any(|key| !matches!(key.as_str(), "enabled" | "use_history_notes_extension"))
})
|| config.token_budget.as_ref().is_some_and(|token_budget| {
let mut settings = token_budget.clone();
settings.use_history_notes_extension = false;
settings != TokenBudgetConfig::default()
})
}
/// Resolves user-configured token-budget preferences against the current model's defaults.
pub(super) fn resolve_token_budget(
configured_token_budget: Option<&TokenBudgetConfig>,
use_model_defaults: bool,
model_info: &ModelInfo,
) -> Option<TokenBudgetConfig> {
if !use_model_defaults {
return configured_token_budget.cloned();
}
let Some(model_defaults) = model_info
.model_messages
.as_ref()
.and_then(|messages| messages.token_budget.as_ref())
else {
return configured_token_budget.cloned();
};
let token_budget = TokenBudgetConfig {
use_history_notes_extension: configured_token_budget
.is_some_and(|token_budget| token_budget.use_history_notes_extension),
reminder_threshold_tokens: Some(model_defaults.reminder_threshold_tokens),
reminder_message_template: model_defaults.reminder_message_template.clone(),
guidance_message: Some(model_defaults.guidance_message.clone()),
auto_compact_fallback_prompt: Some(model_defaults.auto_compact_fallback_prompt.clone()),
auto_compact_fallback_buffer_tokens: Some(
model_defaults.auto_compact_fallback_buffer_tokens,
),
};
if let Err(error) = token_budget.validate() {
tracing::warn!(
model = %model_info.slug,
%error,
"ignoring invalid model-owned token-budget defaults"
);
return configured_token_budget.cloned();
}
Some(token_budget)
}
/// Applies model activation defaults before thread extensions are initialized.
pub(super) fn apply_model_defaults(config: &mut Config, model_info: &ModelInfo) {
let Some(model_defaults) = model_info
.model_messages
.as_ref()
.and_then(|messages| messages.token_budget.as_ref())
else {
return;
};
if !model_defaults.enabled {
return;
}
let has_explicit_config = config.token_budget.is_some()
|| config
.config_layer_stack
.effective_config()
.get("features")
.and_then(|features| features.get("token_budget"))
.is_some();
if has_explicit_config {
return;
}
if config.features.enable(Feature::TokenBudget).is_err() {
return;
}
// Managed requirements can pin the feature off even when enable() succeeds.
if !config.features.enabled(Feature::TokenBudget) {
return;
}
// Keep prompts unresolved so later turns and model switches use their own defaults.
config.token_budget = Some(TokenBudgetConfig {
use_history_notes_extension: model_defaults.use_history_notes_extension,
..TokenBudgetConfig::default()
});
}
pub(super) async fn maybe_record(
sess: &Session,
turn_context: &TurnContext,
base_window_tokens_remaining: Option<i64>,
allow_auto_compact_fallback: bool,
) {
if !turn_context.config.features.enabled(Feature::TokenBudget) {
return;
}
let Some(base_window_tokens_remaining) = base_window_tokens_remaining else {
return;
};
let Some(config) = turn_context.config.token_budget.as_ref() else {
return;
};
if config
.reminder_threshold_tokens
.is_some_and(|threshold| base_window_tokens_remaining <= threshold)
{
let reminder_due = {
let mut state = sess.state.lock().await;
state.claim_token_budget_reminder()
};
if reminder_due {
let response_item =
ContextualUserFragment::into(crate::context::TokenBudgetReminder::new(
&config.reminder_message_template,
base_window_tokens_remaining,
));
sess.record_conversation_items(
turn_context,
turn_context.model_info(),
std::slice::from_ref(&response_item),
)
.await;
}
}
if !allow_auto_compact_fallback || base_window_tokens_remaining != 0 {
return;
}
let Some(prompt) = config.auto_compact_fallback_prompt.as_deref() else {
return;
};
let fallback_due = {
let mut state = sess.state.lock().await;
state.claim_auto_compact_fallback()
};
if !fallback_due {
return;
}
let response_item =
ContextualUserFragment::into(crate::context::AutoCompactFallbackPrompt::new(prompt));
sess.record_conversation_items(
turn_context,
turn_context.model_info(),
std::slice::from_ref(&response_item),
)
.await;
}
#[cfg(test)]
mod tests {
use super::experimental_context_is_eligible;
use codex_protocol::account::PlanType;
use codex_protocol::auth::AuthMode;
#[test]
fn experimental_context_requires_eligible_chatgpt_subscription() {
for (auth_mode, plan_type, expected) in [
(AuthMode::Chatgpt, PlanType::Plus, true),
(AuthMode::Chatgpt, PlanType::Pro, true),
(AuthMode::Chatgpt, PlanType::ProLite, true),
(AuthMode::Chatgpt, PlanType::Free, false),
(AuthMode::Chatgpt, PlanType::Enterprise, false),
(AuthMode::ApiKey, PlanType::Pro, false),
] {
assert_eq!(
experimental_context_is_eligible(auth_mode, Some(plan_type)),
expected
);
}
}
}
|