docs: mark stage 4 runtime gaps explicit

crates/fparkan-animation/src/lib.rs

@@ -1,15 +1,18 @@
 #![forbid(unsafe_code)]
 #![allow(clippy::cast_precision_loss)]
 //! Deterministic animation sampling contracts.
+//!
+//! The current sampler is a portable reference path. Compatibility profiles
+//! that require runtime-captured x87 parity remain explicit evidence gaps.
 
 use std::fmt;
 
 /// Numeric profile.
 #[derive(Clone, Copy, Debug, Eq, PartialEq)]
 pub enum NumericProfile {
-    /// Portable reference.
+    /// Portable reference sampler implemented by this crate.
     PortableReference,
-    /// X87-compatible compatibility profile for captured parity vectors.
+    /// Reserved profile for future runtime-captured x87 parity vectors.
     X87Compatibility,
 }
 
@@ -424,8 +427,11 @@ impl PoseTrack {
         &self.keys
     }
 
-    /// Samples the pose track with linear translation and normalized quaternion
-    /// interpolation.
+    /// Samples the pose track with the portable reference path.
+    ///
+    /// `NumericProfile::X87Compatibility` is accepted so callers can keep the
+    /// compatibility contract explicit, but it does not yet select an
+    /// independently captured x87 runtime path.
     ///
     /// # Errors
     ///

crates/fparkan-fx/src/lib.rs

@@ -1,5 +1,10 @@
 #![forbid(unsafe_code)]
 //! FXID effect contracts.
+//!
+//! FXID decoding and command framing are implemented as compatibility
+//! contracts. The create/update/emit lifecycle below is a deterministic
+//! reference stub until opcode timing, gates, RNG, and command-body semantics
+//! are backed by runtime-captured evidence.
 
 use fparkan_binary::{Cursor, DecodeError};
 use std::sync::Arc;
@@ -121,7 +126,7 @@ impl Default for Transform {
 #[derive(Clone, Copy, Debug, Default, Eq, PartialEq)]
 pub struct GameTime(pub u64);
 
-/// FX runtime state.
+/// FX reference-stub runtime state.
 #[derive(Clone, Debug)]
 pub struct FxState {
     /// Instance id.
@@ -322,12 +327,12 @@ pub fn decode_fxid(bytes: Arc<[u8]>) -> Result<FxDocument, FxError> {
     })
 }
 
-/// Creates an FX instance.
+/// Creates a deterministic FX reference-stub instance.
 ///
 /// # Errors
 ///
 /// Currently returns [`FxError`] only for future resource/lifecycle validation
-/// hooks; creation is deterministic for a decoded document.
+/// hooks. This function does not claim original runtime parity.
 pub fn create_instance(
     document: Arc<FxDocument>,
     seed: FxSeed,
@@ -344,21 +349,21 @@ pub fn create_instance(
     })
 }
 
-/// Updates FX simulation time without emitting side effects.
+/// Updates reference-stub FX simulation time without emitting side effects.
 ///
 /// # Errors
 ///
-/// Reserved for future runtime validation.
+/// Reserved for future runtime-captured compatibility validation.
 pub fn update(state: &mut FxState, time: GameTime) -> Result<(), FxError> {
     state.time = time;
     Ok(())
 }
 
-/// Emits active commands without advancing state.
+/// Emits reference-stub active commands without advancing state.
 ///
 /// # Errors
 ///
-/// Reserved for future resource/runtime validation.
+/// Reserved for future resource/runtime-captured compatibility validation.
 pub fn emit(state: &FxState, out: &mut Vec<FxEmission>) -> Result<(), FxError> {
     if state.lifecycle != FxLifecycle::Running {
         return Ok(());

fixtures/acceptance/coverage.tsv

@@ -232,8 +232,8 @@ S4-ANIM-005	covered	cargo test -p fparkan-animation --offline exact_key_time_ret
 S4-ANIM-006	covered	cargo test -p fparkan-animation --offline pose_track_blends_translation_and_rotation
 S4-ANIM-007	covered	cargo test -p fparkan-animation --offline quaternion_shortest_path_sign_flip_is_stable
 S4-ANIM-008	covered	cargo test -p fparkan-animation --offline zero_or_degenerate_key_interval_is_rejected
-S4-ANIM-009	covered	cargo test -p fparkan-animation --offline x87_boundary_golden_vectors_and_profile_difference_report
-S4-ANIM-010	covered	cargo test -p fparkan-animation --offline x87_boundary_golden_vectors_and_profile_difference_report
+S4-ANIM-009	omitted	current sampler is a portable reference path; runtime-captured x87 parity vectors are not implemented in the macOS-focused scope
+S4-ANIM-010	omitted	current sampler accepts the profile marker but does not implement an independent x87 compatibility path
 S4-ANIM-011	covered	cargo test -p fparkan-animation --offline blend_optional_pose_uses_valid_side
 S4-ANIM-012	covered	cargo test -p fparkan-animation --offline hierarchy_evaluates_parent_before_child_and_rejects_cycles
 S4-ANIM-013	covered	cargo test -p fparkan-animation --offline hierarchy_evaluates_parent_before_child_and_rejects_cycles
@@ -254,13 +254,13 @@ S4-FX-014	covered	cargo test -p fparkan-fx --offline rejects_command_count_that_
 S4-FX-015	covered	cargo test -p fparkan-fx --offline rejects_trailing_bytes_after_command_stream
 S4-FX-016	covered	cargo test -p fparkan-fx --offline fixed_resource_refs_preserve_tails
 S4-FX-017	covered	cargo test -p fparkan-fx --offline missing_dependency_error_contains_effect_command_archive_and_name
-S4-FX-018	covered	cargo test -p fparkan-fx --offline create_records_seed_transform_and_start_time
-S4-FX-019	covered	cargo test -p fparkan-fx --offline update_and_emit_are_separate
-S4-FX-020	covered	cargo test -p fparkan-fx --offline update_and_emit_are_separate
-S4-FX-021	covered	cargo test -p fparkan-fx --offline stable_command_order_and_emission_capture_are_seed_stable
-S4-FX-022	covered	cargo test -p fparkan-fx --offline stop_restart_end_lifecycle_controls_emission
-S4-FX-023	covered	cargo test -p fparkan-fx --offline stable_command_order_and_emission_capture_are_seed_stable
-S4-FX-024	covered	cargo test -p fparkan-fx --offline unrelated_rng_stream_use_does_not_perturb_fx_capture
+S4-FX-018	omitted	FX create/update/emit is documented as a deterministic reference stub until runtime-captured lifecycle semantics are implemented
+S4-FX-019	omitted	FX update side-effect contract is stub-level only and not accepted as original runtime parity evidence
+S4-FX-020	omitted	FX emit side-effect contract is stub-level only and not accepted as original runtime parity evidence
+S4-FX-021	omitted	FX command order is deterministic for the stub but original runtime ordering evidence is not implemented
+S4-FX-022	omitted	FX lifecycle controls are deterministic for the stub but original stop/restart/end semantics are not implemented
+S4-FX-023	omitted	FX emission capture is deterministic for the stub but lacks runtime-captured parity evidence
+S4-FX-024	omitted	FX RNG accounting is not implemented beyond the reference stub and must not count as compatibility coverage
 S4-FX-FUZZ-001	covered	cargo test -p fparkan-fx --offline arbitrary_command_streams_are_bounded_and_panic_free
 L4-P1-ANIM-001	covered	cargo test -p fparkan-msh --offline licensed_corpus_animation_streams_sample_approved_pose_captures
 L4-P2-ANIM-001	covered	cargo test -p fparkan-msh --offline licensed_corpus_animation_streams_sample_approved_pose_captures
@@ -271,8 +271,8 @@ L4-P2-FX-001	covered	cargo test -p fparkan-fx --offline licensed_corpus_fxid_exa
 L4-P1-FX-002	covered	cargo test -p fparkan-fx --offline licensed_corpus_fxid_exact_eof_and_distribution
 L4-P2-FX-002	covered	cargo test -p fparkan-fx --offline licensed_corpus_fxid_exact_eof_and_distribution
 L4-FX-OP6-001	covered	cargo test -p fparkan-fx --offline licensed_corpus_fxid_exact_eof_and_distribution
-L4-P1-EFFECT-001	covered	cargo test -p fparkan-fx --offline licensed_corpus_fxid_emission_captures_are_approved
-L4-P2-EFFECT-001	covered	cargo test -p fparkan-fx --offline licensed_corpus_fxid_emission_captures_are_approved
+L4-P1-EFFECT-001	omitted	licensed FX emission capture currently covers deterministic reference-stub output, not original runtime-captured effect parity
+L4-P2-EFFECT-001	omitted	licensed FX emission capture currently covers deterministic reference-stub output, not original runtime-captured effect parity
 S5-LMESH-001	covered	cargo test -p fparkan-terrain-format --offline land_msh_required_streams_are_order_independent_and_stride_checked
 S5-LMESH-002	covered	cargo test -p fparkan-terrain-format --offline land_msh_required_streams_are_order_independent_and_stride_checked
 S5-LMESH-003	covered	cargo test -p fparkan-terrain-format --offline decodes_minimal_land_msh