v0.1.4

Fixed

• MR, MRX, and MRY no longer double-count their measurement flip probability as both a pre-measurement Pauli error and a measurement-result flip. (#124)
• Fixed a bug where M(p) instructions incorrectly flipped the qubit, not just the measurement record. This would affect circuits where qubits were measured and not immediately reset. (#138)
• Fixed a bug where MR !q instructions (with measurement record inversion) produced wrong measurement results. (#138)
• Out-of-order OBSERVABLE_INCLUDE indices now produce the correct sampler column order and output shape. Missing indices below the maximum mentioned id appear as deterministic-zero columns, and columns are emitted in sorted logical-index order. (#127)
• matmul_gf2 no longer silently corrupts parity for inner products with more than 255 set bits. The float32→uint8 cast in JAX saturates at 255, which previously made % 2 always return 1 once a row-sum reached 256. The modulo is now applied on float32 before the uint8 cast. (#130)
• CompiledDetectorSampler.sample now raises ValueError when separate_observables=True is combined with prepend_observables=True or append_observables=True (matching Stim). Previously these combinations silently dropped observable columns. The prepend_observables=True + append_observables=True combination is now supported and returns columns in [obs, det, obs] order, matching Stim. (#134, #140)
• OBSERVABLE_INCLUDE with Pauli targets (e.g. OBSERVABLE_INCLUDE(0) X1) now raises ValueError instead of silently producing wrong observable bits or crashing with IndexError. tsim only supports measurement-record targets (rec[-k]). (#140)
• Empty DETECTOR and OBSERVABLE_INCLUDE annotations (without targets) no longer crash the parser; they now produce zero detector/observable bits, matching Stim semantics. (#127)
• CompiledDetectorSampler.sample with use_detector_reference_sample=True or use_observable_reference_sample=True no longer returns fewer rows than shots when called with an explicit batch_size that exactly divides shots. (#131)
• Incorrect visualization of CORRELATED_ERROR and ELSE_CORRELATED_ERROR instructions in the pyzx diagram renderer. Previously, error vertices were rendered as classical spiders instead of bold quantum spiders. (#133)
• Sweep-bit targets (e.g. CX sweep[0] 1) were silently parsed as unconditional gates. The parser now raises NotImplementedError, since sweep parameters are not supported by Tsim. (#136)

Added

• TPP and TPP_DAG instructions — applies exp(-i pi/8 P) or exp(+i pi/8 P) (up to global phase) for a Pauli product P, i.e., phases the -1 eigenspace of P by exp(i pi/4) or exp(-i pi/4). (#121)
• Circuit.is_clifford now supports REPEAT blocks. (#128)