preframr-tokens 0.6.0

SID reglog parsing, tokenization, and macro transforms extracted from the preframr research codebase.

preframr-tokens

SID reglog parsing, tokenization, and macro transforms extracted from the preframr research codebase.

Torch-free. The training-side concerns (model, loss, DataLoader, predict) live in the main preframr repo; this package contains the stable parsing + encoding layer that produces the parsed parquets + unigram tokenizer alphabet that downstream training consumes.

Install

pip install preframr-tokens

Modules

• preframr_tokens.reglogparser -- SID dump → parsed dataframe pipeline. RegLogParser.
• preframr_tokens.regtokenizer -- alphabet build + unigram tokenizer fit. RegTokenizer.
• preframr_tokens.macros.* -- declarative Transform registry plus the macro / pre-norm passes (slope, preset, hard_restart, legato_per_cluster, voice_block_order, ctrl_bigram, loop, etc.). Macros declare OP_CODES, LOSS_TIER, SUBSTITUTABLE_OPS, MUST_FOLLOW, etc. on their classes; pipeline_check.validate_pipeline_spec validates a pipeline declaratively.
• preframr_tokens.stfconstants -- SID register IDs, op codes, pandas dtypes, PAL clock constants.
• preframr_tokens.engine_fingerprint -- engine clustering for cross-engine evaluation pinning.
• preframr_tokens.coarsen_pass -- tracker-export pass (lossy audio-domain bucketing).
• preframr_tokens.dump_meta -- per-dump metadata sidecar with code-hash staleness gate.
• preframr_tokens.reglog_helpers -- palette IO + dtype tightening.
• preframr_tokens.alphabet_projection -- eval-set atom projection table.
• preframr_tokens.reg_mappers -- FreqMapper (PAL clock + cents quantization).
• preframr_tokens.constrained_decode -- per-step structural-validity mask for sampling-time logit guarding. Pure numpy state machine; consumers (torch users) apply the returned bool mask with a single masked_fill at the boundary.
• preframr_tokens.blocks -- block iteration + materialization helpers: iter_voiced_blocks, materialize_block_array, parser_worker, glob_dumps, reg_widths_path, self_contained_prompt_df, plus the SeqMeta dataclass and parse_eval_reglogs / LEGACY_EVAL_SUBSET_NAME for eval-subset routing. Torch-free; main repo's RegDataset wraps the outputs in DataLoaders.
• preframr_tokens.audit_primitives -- pure-Python token-level audit functions: tier_accuracy (per-tier hit-rate + content/ structural ratio), detect_tail_cycle (loop-collapse detector), distinct_n (n-gram diversity). Used by the generalization-gate callback in main repo and by post-hoc audit scripts.
• preframr_tokens.corpus -- Corpus class: torch-free corpus orchestration owning the RegTokenizer + reg_widths + tokenize-stage metadata. Methods load_dfs, make_tokens, encode_and_save_cached_blocks, try_preload_from_disk, preload, iter_block_seqs, iter_predict_block_seqs cover the full parse → tokenize → load pipeline up to the point where blocks need to be routed into a torch BlockMapper (main repo's RegDataset is a thin adapter that does that routing).

Library-only

No CLI entry points. Consumers build their own (the main preframr repo's parse.py and stftokenize.py are simple wrappers that construct RegLogParser / RegTokenizer from an argparse.Namespace).

Stability

Library follows semver from v1.0. Pre-1.0 releases may break API as the preframr codebase evolves. Token-alphabet shape changes bump major version since they invalidate downstream checkpoints.

License

Apache 2.0. See LICENSE.