Claude
ae0e17b5dc
Three things to make pickup smoother: 1. analysis/README.md (NEW): catalogues the ~25 scratch scripts. Categorizes them as "still useful" / "superseded — keep for archaeology" / "pure exploration". Tells a fresh engineer which files to read first and which to ignore. 2. scratch/next_experiment_skeleton.py (NEW): stub + spec for the segment-channel scoring analyzer. Includes the fixture loader, block walker, and decode-segment-as-channel helper — just enough scaffolding that the next pass starts from "fill in score_segment_against_all_channels()" rather than from scratch. Already runs and confirms 13 segments per 3-sec event with sample starts going to 6590 (way past the 3328 actual samples) — strong evidence that not all segments carry Tran. 3. Removed decode-re/ duplicate. It was a mirror of tests/fixtures/. Analysis scripts that hardcoded decode-re/ paths updated to point at tests/fixtures/. CLAUDE.md note updated: future event uploads go directly into a dated subdirectory under tests/fixtures/. All 40 tests still pass. Skeleton runs.
67 lines
3.8 KiB
Markdown
67 lines
3.8 KiB
Markdown
# analysis/ — exploratory scripts for waveform-body RE
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**These are scratch.** Run them, read them, copy them, but don't trust
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them as documentation. When a finding is verified it gets promoted
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to `minimateplus/waveform_codec.py` and `tests/test_waveform_codec.py`;
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when it's wrong it stays here as a fossil.
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Authoritative status lives in:
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- `docs/waveform_codec_re_status.md` (current truth, working note)
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- `minimateplus/waveform_codec.py` (verified implementation + docstring)
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- `tests/test_waveform_codec.py` (regression locks against fixtures)
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---
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## Still useful
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| File | What it does |
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| `load_bundle.py` | Fixture loader. Parses BW binary + ASCII TXT into a `Bundle` dataclass with samples, metadata, body bytes. Used by most other scripts here. |
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| `verify_tran.py` | Verifies `decode_tran_initial` against fixture ground truth across all events. Useful when you change the decoder and want a quick sanity check. |
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| `inspect_5_11.py` | Inspects the 5-11-26 high-amplitude bundle's body structure, prints metadata, peaks, and block counts. |
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| `walk_5_11.py` | Walks blocks for the 5-11-26 bundle and prints offset/tag/length/data. |
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| `seg1_blocks.py` | Dumps all blocks in segment 1 of each event. The starting point for cracking multi-segment Tran continuation. |
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| `full_tran.py` | Multi-segment Tran decoder attempt (broken — diverges at sample ~512). Useful as a starting scaffold for the next experiment. |
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| `multi_segment.py` | Earlier multi-segment attempt with different segment-header consumption strategies. Records what didn't work. |
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| `test_rle.py` | Tests `00 NN` interpretation as zero-RLE with different divisor values. Documents how the RLE rule was confirmed. |
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## Superseded — keep for archaeology
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| File | Superseded by |
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| `walk_v2.py` … `walk_v5.py` | `walk_v6.py` and ultimately `minimateplus/waveform_codec.walk_body`. Each version represents one round of refinement. Don't read in isolation — read the diff between them to see what was learned. |
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| `walk_chunks.py` | `walk_v6.py` / production walker |
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| `decode_v1.py` | First naive decoder attempt. Wrong but readable. |
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## Pure exploration — read if curious
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| File | What it explored |
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| `inspect_body.py` | Byte-frequency stats per event. Established that bytes 0x00 / 0x10 dominate. |
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| `find_blocks.py` | Searched for repeating 2-byte tag patterns. |
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| `find_signal_runs.py` | Searched for stretches of bytes that "look like a smooth signal" (small inter-byte deltas). Found the `20 NN` literal blocks. |
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| `dump_head.py`, `dump_trailer.py`, `dump_around.py` | Hex dumpers at various body positions. |
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| `compare_cd.py` | Byte-diff between event-c and event-d (same length, similar signal). Used to identify structural vs data bytes. |
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| `brute_force.py` | Tested 96 combinations of channel-permutation × nibble-order × sign-convention × init-from-header on the quiet bundle. All failed because the quiet bundle had T[0]=T[1]=0, making the preamble undetectable. |
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| `try_nibbles.py`, `try_layouts.py` | Earlier channel-interleaving hypotheses. All wrong. |
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| `test_tran_continue.py` | Test of "Tran continues uninterrupted across `30 04` blocks" hypothesis. Disproven. |
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---
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## Adding new scripts
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If you're picking up the codec work, feel free to add new scripts here.
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Suggested conventions:
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- Start the filename with what you're testing: `test_<hypothesis>.py`,
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`verify_<piece>.py`, `inspect_<region>.py`.
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- Print enough output that the reader can see exactly which events
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match / diverge and where.
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- When a finding is solid, move the verified logic to
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`minimateplus/waveform_codec.py` and add a regression test in
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`tests/test_waveform_codec.py` — don't leave the truth only in
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this directory.
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- If a script is fully superseded, leave it in place (don't delete) —
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the fossil record is useful when re-evaluating hypotheses later.
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