Silk support expectations (from `sage`)

Snapshot (last verified)

Date: 2026-03-05
sage: 9eae523214b9
silk: 382cc9e11f3a (silk (ABI) 0.2.0)
Baseline: linux/glibc x86_64 (hosted POSIX runtime)
Verified (sage build):
- silk test --package . (20 tests)
- silk build --package .
- ldd ./build/bin/sage (no libcurl, libssh2, or libmbedtls DT_NEEDED)

Filesystem mapping + temp files: std::runtime::fs::{mmap_readonly, munmap, mkstemp, unlink}
TTY I/O: std::io::{isatty, tty_size, tty_open, tty_raw_mode}
Concurrency: task fn, attr(task=pool) / attr(task_pool), SILK_TASK_POOL_THREADS=<n>
Sync primitives: std::sync::{ChannelBorrow(T).wait_fd, ChannelSender(T), CancellationToken}
Async event loop surface: std::runtime::event_loop::{sleep_ms, fd_wait_readable, fd_wait_readable2, fd_wait_readable_any, fd_wait_readable_any_timeout_ms, fd_wait_writable}
Vendored headers for C inputs: silk build adds <prefix>/lib/silk/vendor/include to the include path when compiling .c inputs
URL parsing: std::url::{URL.parse, parse_with_base} + URL.{href,scheme,host,port,path,query,fragment}
HTTP: std::http response parsing supports Content-Length, Transfer-Encoding: chunked, and body-to-EOF
HTTPS: std::https::Connection.connect_host(SocketAddrV4, hostname) and connect_host_v6(SocketAddrV6, hostname) + std::tls::Session.client_verified_system() + Session.set_hostname(...)
TLS 1.3: std::tls handles MBEDTLS_ERR_SSL_RECEIVED_NEW_SESSION_TICKET as WouldBlockRead
SSH/SFTP: std::ssh2 supports SFTP reads and OpenSSH known_hosts verification helpers

DNS / connect-by-hostname in std::net (A/AAAA; v4/v6 selection)
Reliable async coroutine spawning in multi-threaded processes
Portable signal wait/handling beyond Linux signalfd
Regex engine support for input sizes > INT32_MAX (or a streaming/iterator API)
Terminal cell width + grapheme segmentation for correct TUI rendering
Bindgen-style tooling + ABI validation for ext declarations