Module context 

Context state nodes: non-deterministic, session-scoped values.

These nodes produce values from the execution environment rather than the coordinate space. They break the deterministic model and should be used deliberately.

SRD-80b Phase E migration. All authoring goes through #[polydat_node]. Three shapes appear here:

• Pure clock / OS reads (current_epoch_millis, thread_id) — plain body, marked Nondeterministic.
• Construction-frozen captures (session_start_millis, elapsed_millis, tmp_dir, env_or) — use #[poly_const(setup_fn, from = ())] (or from = <const_arg> when the capture depends on a const) to compute the cached value once at construction. The body just reads the cache.
• Fallible construction (env) — body returns Result<String, String>. The macro emits try_new and propagates Err as a workload-compile error via the build closure.

Structs

Counter

Monotonic counter (non-deterministic). SRD-80 PR B.11 migration.

CurrentEpochMillis

Current wall-clock time in epoch milliseconds.

CursorLimit

Cursor limit node: passes through the input value unchanged.

ElapsedMillis

Elapsed milliseconds since session start.

Env

Environment variable read, frozen at construction.

EnvOr

Environment variable read with default, frozen at construction.

SessionStartMillis

Session start time in epoch milliseconds, frozen at construction.

ThreadId

Current OS thread numeric identifier.

TmpDir

System temp directory, frozen at construction.

Functions

signatures

Signature for the cursor-limit passthrough.