Epic: Retire deprecated Baselibs APIs and Bazel targets

[4og]

Purpose

Coordinate removal of deprecated Baselibs Bazel targets and C++ compatibility APIs after consumers have migrated.

This Epic covers the active deprecated surface only: Bazel target aliases/shims and C++ APIs or macros.

Deprecated surface

Category	Deprecated items	Required migration	Deprecated since / provenance
Rust source-layout Bazel shims: #596 ✅	//src/containers:containers //src/elementary:elementary //src/log/score_log:score_log //src/log/stdout_logger:stdout_logger //src/log/stdout_logger_cpp_init:stdout_logger_cpp_init //src/sync:sync //src/testing_macros:score_testing_macros //src/thread:thread	Use their corresponding //score/... targets: containers_rust, allocator, log_rust/*, sync, testing_macros, and thread.	#334, merged 2026-07-02 (9c2a448)
String-manipulation Bazel shims: #596 ✅	//score/memory:{string_literal,string_comparison_adaptor, split_string_view}	Use matching //score/string_manipulation:* targets.	#396, merged 2026-07-21 (7469a0d)
Atomic-indirection Bazel shims: #596 ✅	//score/memory/shared:{atomic_interface, atomic_indirector, atomic_indirector_mock_binding}	Use matching //score/concurrency:* targets.	#396, merged 2026-07-21 (b1de724)
Logging Bazel aliases	//score/mw/log:{console_only_backend,backend_stub_testutil}	Use :console, or :console / :minimal respectively.	2026-03-25 author date, publicly committed 2026-04-14 (cd1ade5), no associated public PR.
Clock Bazel target	//score/os/utils:high_resolution_steady_clock	Use //platform/aas/mw/time:HighPrecisionLocalSteadyClock.	Present at first locally traceable Copybara import, 2025-04-25.
String C++ alias	score::StringLiteral	Use std::string, std::string_view, safecpp::zstring_view, or const char*, depending on use.	2026-04-10 (de91f49), no associated public PR.
Result C++ aliases	score::cpp::Blank score::cpp::ResultBlank	Use void and Result<void>.	#351, merged 2026-07-09 (1427aa4). #385 subsequently corrected ResultBlank to alias Result<void> directly.
Static-reflection macros	STRUCT_VISITABLE STRUCT_TRACEABLE MEMCPY_SERIALIZABLE MEMCPY_SERIALIZABLE_IF	Use the equivalent SCORE_* macro.	#370, merged 2026-07-28 (685ad49)
Timed-task factories	DelayedTask::{Make,MakeWithTaskResult} PeriodicTask::{Make,MakeWithTaskResult}	Use concurrency/timed_executor/{delayed_task,periodic_task}.h. Periodic tasks require ConcurrentTimedExecutor.	Present no later than public import on 2025-04-17. Deprecated for performance reasons.
Legacy continuations	The callback overloads of TaskResult::Then and SharedTaskResult::Then	Use the scoped-callback overload.	Present no later than public import on 2025-04-17. References Ticket-141243.
Logging C++ APIs	mw::log::LogStr(char[N]) LogStream::operator<<(char pointer)	Log supported string-like types directly.	Present no later than public import on 2025-04-14. The pointer overload performs a runtime length scan.
Linux OS API	score::os::pthread_setaffinity_np(size_t)	Use score::os::set_thread_affinity().	Present no later than public import on 2025-04-17.
QNX OS APIs	Neutrino::ChannelCreate(uint32_t) Two older Neutrino::TimerTimeout overloads	Use ChannelCreate(ChannelFlag) and the latest TimerTimeout overload.	Present in public imports/restructuring by 2025-07-18.

Notes

• //score/memory:string_literal and score::StringLiteral are independently deprecated. Migrating only the Bazel target does not remove the C++ alias usage.
• src/ contains no Rust implementation after repo: restructure Rust components #334. Its eight public aliases exist solely for Bazel-label compatibility.
• The older 2025 entries predate retained public provenance. Their dates are first observable dates in this repository, not necessarily the original deprecation dates.