Function parse_py_retention_limits

sdk/python/src/lib.rs:3716–3748

Convert a Python dict (`{max_runs_retained: int, ...}`) into a [`SessionRetentionLimits`](a3s_code_core::retention::SessionRetentionLimits). Returns `None` if the supplied object is not a dict (caller treats that as "no caps" and the framework default applies).

(
    py_obj: &pyo3::PyObject,
)

/// Returns `None` if the supplied object is not a dict (caller treats
/// that as "no caps" and the framework default applies).
fn parse_py_retention_limits(
    py_obj: &pyo3::PyObject,
) -> Option<a3s_code_core::retention::SessionRetentionLimits> {
    use a3s_code_core::retention::SessionRetentionLimits;
    use pyo3::types::PyDict;

    pyo3::Python::with_gil(|py| {
        let bound = py_obj.bind(py);
        let dict = bound.downcast::<PyDict>().ok()?;
        let mut limits = SessionRetentionLimits::new();
        if let Some(v) = dict.get_item("max_runs_retained").ok().flatten() {
            if let Ok(n) = v.extract::<usize>() {
                limits.max_runs_retained = Some(n);
            }
        }
        if let Some(v) = dict.get_item("max_events_per_run").ok().flatten() {
            if let Ok(n) = v.extract::<usize>() {
                limits.max_events_per_run = Some(n);
            }
        }
        if let Some(v) = dict.get_item("max_trace_events").ok().flatten() {
            if let Ok(n) = v.extract::<usize>() {
                limits.max_trace_events = Some(n);
            }
        }
        if let Some(v) = dict.get_item("max_terminal_subagent_tasks").ok().flatten() {
            if let Ok(n) = v.extract::<usize>() {
                limits.max_terminal_subagent_tasks = Some(n);
            }
        }
        Some(limits)
    })
}

// ============================================================================
// PySlashCommand — bridges Python callables into the Rust SlashCommand trait