lean-ctx-engine 3.12.2

pub mod cache;
pub mod config;
pub mod config_provider;
pub mod connection;
pub mod credentials;
pub mod emspace;
pub mod github;
pub mod gitlab;
pub mod hardened_http;
pub mod health;
pub mod init;
pub mod jira;
pub mod jira_oauth;
pub mod mcp_bridge;
pub mod postgres;
pub mod provenance;
pub mod provider_trait;
pub mod registry;
pub mod scaffold;
pub mod selected_gitlab;
pub mod snapshot_projection;

pub use provider_trait::{ContextPacket, ContextProvider, ProviderParams};
pub use registry::{ProviderRegistry, global_registry};

use serde::{Deserialize, Serialize};

use crate::core::evidence::Claim;

/// Intern a string to a process-global `&'static str`, leaking each *unique* value at
/// most once. Provider constructors run per `ctx_provider`/`ctx_preload` call, so a
/// naive `Box::leak` per construction leaked unboundedly; interning bounds the leak to
/// the finite set of distinct provider ids/names/actions.
pub(crate) fn intern(s: String) -> &'static str {
    use std::collections::HashSet;
    use std::sync::{Mutex, OnceLock};
    static POOL: OnceLock<Mutex<HashSet<&'static str>>> = OnceLock::new();
    let pool = POOL.get_or_init(|| Mutex::new(HashSet::new()));
    let mut guard = pool
        .lock()
        .unwrap_or_else(std::sync::PoisonError::into_inner);
    if let Some(&existing) = guard.get(s.as_str()) {
        return existing;
    }
    let leaked: &'static str = Box::leak(s.into_boxed_str());
    guard.insert(leaked);
    leaked
}

#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct ProviderResult {
    pub provider: String,
    pub resource_type: String,
    pub items: Vec<ProviderItem>,
    pub total_count: Option<usize>,
    pub truncated: bool,
}

#[derive(Debug, Clone, Default, Serialize, Deserialize)]
pub struct ProviderItem {
    pub id: String,
    pub title: String,
    pub state: Option<String>,
    pub author: Option<String>,
    pub created_at: Option<String>,
    pub updated_at: Option<String>,
    pub url: Option<String>,
    pub labels: Vec<String>,
    pub body: Option<String>,
    /// Attributable evidence distilled from this item (confidence + source).
    /// Empty for plain records; populated by research/extraction providers.
    #[serde(default, skip_serializing_if = "Vec::is_empty")]
    pub claims: Vec<Claim>,
    /// Repository paths (files or directories) the item is about, declared by
    /// the provider rather than found in its text. Indexed as cross-source
    /// references beside the paths extracted from the body.
    #[serde(default, skip_serializing_if = "Vec::is_empty")]
    pub references: Vec<String>,
}

impl ProviderResult {
    pub fn format_compact(&self) -> String {
        let mut out = self.compact_header(self.items.len());
        for item in &self.items {
            out.push_str(&item.format_compact());
        }
        out
    }

    /// The list line of [`Self::format_compact`] for `count` listed items.
    pub fn compact_header(&self, count: usize) -> String {
        format!(
            "{} {} ({}{}):\n",
            self.provider,
            self.resource_type,
            count,
            if self.truncated { "+" } else { "" }
        )
    }
}

impl ProviderItem {
    /// The lines of one item in [`ProviderResult::format_compact`]: all it
    /// shows of the item, so it can be admitted as that item's source.
    pub fn format_compact(&self) -> String {
        let state = self.state.as_deref().unwrap_or("");
        let labels = if self.labels.is_empty() {
            String::new()
        } else {
            format!(" [{}]", self.labels.join(","))
        };
        let mut out = format!("  #{} {} ({}){}\n", self.id, self.title, state, labels);
        for claim in &self.claims {
            out.push_str("    ▸ ");
            out.push_str(&claim.render());
            out.push('\n');
        }
        out
    }
}