Package Overview

The toolchain embeds the following importable modules (packages/internal/manifest.json → importable_modules):

import	Path	User surface	Example
Numerics	packages/linalg/mod.sy	packed-SYX Mat (Host-backed)	examples/linalg/
System	packages/system/mod.sy	ProcessInfo / File / FilePath / Env / process helpers; failures throw SystemError	examples/os_info/ · examples/file_tool/
Logging	packages/log/mod.sy	level filtering + structured field lines (Log)	examples/log_fields.sy
Networking	packages/networking/mod.sy	Http / Url; TLS client	examples/http_tool/
Crypto	packages/crypto/mod.sy	hashing and more	examples/basic_demo.sy
Text	packages/text/mod.sy	Fmt / Regex / Encoding / Bytes	—
Synchronization	packages/sync/mod.sy	Channel / Mutex / Semaphore	examples/concurrency_control/
SQL	packages/data/sql.sy	:memory: CRUD; SqlRow accessors row: Dictionary (R-11; ≠ Object)	examples/sql_tool/
Testing	packages/testing/mod.sy	assert / assertEq	examples/test_demo.sy
DI	packages/di/mod.sy	Service DI	examples/service_di/
UI	packages/ui/mod.sy	SynUI bridge; not product GUI GA	examples/gui_demo.sy
Tracing	packages/trace/mod.sy	spans (MVP)	—
Metrics	packages/metrics/mod.sy	counters / gauges (MVP)	—
Profiling	packages/profiler/mod.sy	wall / CPU sections (MVP)	—
JSON	CORE	encode / decode	—
Fmt	CORE / Text	formatting helpers	—
OrderedSet / Deque	CORE collections	ordered set / deque	—
Math / Random / SIMD4	CORE	math / RNG / SIMD helpers	—

Math comes in through the CORE prelude (packages/core/), so static Math.* is usable without import Math; there is no prelude Mat (use import Numerics).

Object / Dictionary are likewise part of CORE (object.sy); default literal → Dictionary; explicit : Object remains for residual paths.

Importing

import Numerics
import System
import Logging

func main() {
    let a = Mat.from([1.0, 0.0, 0.0, 1.0], rows: 2, cols: 2)
    print(a.rows)
    print(ProcessInfo.processorCount)
    Log.info("ok")
}

import foo in the same directory still resolves the local foo.sy; embedded names (Numerics, System, …) are resolved by the toolchain to packages/.