Type Alias CauslTsFloorReason

Remarks

'ts-floor' on its own collapses four distinguishable situations, and an attribution API that cannot separate a bug from a choice is not doing its job. The four:

1. the #123 startup race — an implicit createCausl() ran before preloadCauslWasm() resolved. A BUG in the adopter's boot ordering.
2. an explicit floor opt. A CHOICE. Removed in 0.5.0 (#280).
3. { fallbackToTs: true } — the caller asked for wasm and did not get it. An intent that was not honoured.
4. the §18A.13.1 capability degrade — WasmGC could not instantiate on this host. A host limitation.

This subpath can only attribute (3), and it is honest about the boundary rather than guessing at the rest. The reason is stamped where the graph object is produced, and in cases (1), (2) and (4) it is ../src/graph.ts that produces it, not this file: createWasmSyncIfPreloaded returns undefined (../src/wasm-registry.ts:427,431 for (1), :437-adjacent catch for (4)) and createCausl then builds the floor graph itself (../src/graph.ts:1135), while (2) never enters this subpath at all (../src/graph.ts:1113). This module never holds those graph objects, so it has nothing to stamp them with. Reporting the reason for those would require a stamping seam in ../src/graph.ts and ../src/wasm-registry.ts — two files outside this change — and #123's own record is process-scoped ("first pre-preload site"), not per-graph, so it would not transfer as-is.

Consequently:

• 'wasm-fallback' — the caller ASKED for the wasm engine on one of this subpath's factories and opted into the soft degrade (fallbackToTs / its fallbackToJs alias, #150). The wasm path failed and this graph is the consolation. The one case worth alerting on: the intent is recorded in the call, so the gap between what was asked for and what was delivered is a fact, not an inference.
• 'unattributed' — everything else. Deliberately phrased as what was OBSERVED rather than as a category, because the observation ("no wasm factory in this module built this graph") is all that is known. It covers (1), (2) and (4) and does not pretend to tell them apart.