cx-git-agent
125 lines
4.0 KiB
Rust
125 lines
4.0 KiB
Rust
use serde::{Deserialize, Serialize};
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/// A policy definition loaded from YAML.
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#[derive(Debug, Clone, Serialize, Deserialize)]
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pub struct Policy {
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pub id: String,
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pub name: String,
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pub description: String,
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pub enabled: bool,
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#[serde(default)]
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pub rules: Vec<PolicyRule>,
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}
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#[derive(Debug, Clone, Serialize, Deserialize)]
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pub struct PolicyRule {
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pub field: String,
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pub operator: String, // "contains", "equals", "not_contains", "matches"
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pub value: String,
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pub action: String, // "reject", "warn", "modify"
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#[serde(default = "default_severity")]
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pub severity: String,
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}
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fn default_severity() -> String {
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"warning".to_string()
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}
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impl Policy {
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/// Check if a plan violates this policy.
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pub fn evaluate(&self, plan: &serde_json::Value) -> Vec<Violation> {
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if !self.enabled {
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return vec![];
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}
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let plan_str = serde_json::to_string(plan).unwrap_or_default();
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let mut violations = Vec::new();
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for rule in &self.rules {
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let matched = match rule.operator.as_str() {
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"contains" => plan_str.contains(&rule.value),
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"not_contains" => !plan_str.contains(&rule.value),
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"equals" => {
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plan.get(&rule.field)
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.and_then(|v| v.as_str())
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.map(|v| v == rule.value)
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.unwrap_or(false)
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}
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_ => false,
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};
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if matched && rule.action == "reject" {
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violations.push(Violation {
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policy_id: self.id.clone(),
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policy_name: self.name.clone(),
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rule_field: rule.field.clone(),
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severity: rule.severity.clone(),
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description: format!(
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"Policy '{}' violated: field '{}' {} '{}'",
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self.name, rule.field, rule.operator, rule.value
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),
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});
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}
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}
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violations
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}
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}
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#[derive(Debug, Clone, Serialize)]
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pub struct Violation {
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pub policy_id: String,
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pub policy_name: String,
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pub rule_field: String,
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pub severity: String,
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pub description: String,
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}
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/// Load default built-in policies.
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pub fn default_policies() -> Vec<Policy> {
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vec![
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Policy {
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id: "no-destructive-ops".to_string(),
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name: "No Destructive Operations".to_string(),
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description: "Block plans that delete or drop resources".to_string(),
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enabled: true,
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rules: vec![
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PolicyRule {
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field: "tool_calls".to_string(),
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operator: "contains".to_string(),
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value: "DROP TABLE".to_string(),
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action: "reject".to_string(),
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severity: "critical".to_string(),
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},
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PolicyRule {
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field: "tool_calls".to_string(),
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operator: "contains".to_string(),
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value: "rm -rf".to_string(),
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action: "reject".to_string(),
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severity: "critical".to_string(),
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},
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],
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},
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Policy {
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id: "no-external-network".to_string(),
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name: "No External Network Calls".to_string(),
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description: "Block plans that make calls to unknown external services".to_string(),
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enabled: true,
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rules: vec![PolicyRule {
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field: "tool_calls".to_string(),
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operator: "contains".to_string(),
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value: "0.0.0.0".to_string(),
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action: "reject".to_string(),
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severity: "warning".to_string(),
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}],
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},
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Policy {
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id: "max-tool-calls".to_string(),
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name: "Maximum Tool Calls".to_string(),
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description: "Limit the number of tool calls per plan".to_string(),
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enabled: true,
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rules: vec![],
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},
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]
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}
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