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909e920 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 | # Expected digests
All digests below are SHA-256, lowercase hex. These are the pinned values
a conforming clean-room implementation of `docs/CIS2_SPEC_v0.3b.md` (current)
MUST reproduce bit-for-bit. No timing numbers are recorded anywhere in this
repository by policy. Historical v0.2 digests are kept below for reference.
## Primary normative test vector (§13.1, spec v0.3b): SmolLM2-135M, `gen_toks=16`
Model: `HuggingFaceTB/SmolLM2-135M`, prompt `"Once upon a time"`, 16
greedy-decoded tokens, fp32 compute. Only `table_digest` and `CIS2_REF`
changed from v0.2 (RoPE range-reduction fix, see CHANGELOG.md v0.3/v0.3b);
`inv_freq_table_digest`, `argmax_digest`, and `generated_token_ids` are
unchanged from v0.1/v0.2.
```
weights_sha256 = 80521b40281d6ce74e35c9282c22539e75aa0ac8578892b2a59955ef78d55da1
config_sha256 = 1d556eab73b69c7f11f64c557a2f9c6f440bd4c6b89bb2584a6b498c92603843
tokenizer_sha256 = 9ca9acddb6525a194ec8ac7a87f24fbba7232a9a15ffa1af0c1224fcd888e47c
table_digest = 23c7bfaf5cef0095fd021af2eb1808abb4928bae4219756d86bdac670a06b35d
inv_freq_table_digest = da9f6dcfde0425588815509e874515cdcd3d6b8818b6d0136590052e7bbf6f12
argmax_digest = 0b9c8f3ac90d0b9cd5f1719ac327dca1fc639fd87468305fccebbe3d56f67aff
generated_token_ids = 28,665,436,253,1838,8180,3365,14176,30,2306,4161,281,253,2066,2291,351
CIS2_REF (witness digest) = d82743059d1db929e710236fe4ec37f89e6f932524801345a006980f7c3cc9df
```
This is the value `scripts/self_check.sh` builds `verify3/` and compares
against.
## Historical: spec v0.2 primary test vector (superseded)
Model: `HuggingFaceTB/SmolLM2-135M`, prompt `"Once upon a time"`, 16
greedy-decoded tokens, fp32 compute.
```
weights_sha256 = 80521b40281d6ce74e35c9282c22539e75aa0ac8578892b2a59955ef78d55da1
config_sha256 = 1d556eab73b69c7f11f64c557a2f9c6f440bd4c6b89bb2584a6b498c92603843
tokenizer_sha256 = 9ca9acddb6525a194ec8ac7a87f24fbba7232a9a15ffa1af0c1224fcd888e47c
table_digest = 465d358ccd63721256dbd2abbc77ad5de755adf3230635f95b12b1727dfa1ea3
inv_freq_table_digest = da9f6dcfde0425588815509e874515cdcd3d6b8818b6d0136590052e7bbf6f12
argmax_digest = 0b9c8f3ac90d0b9cd5f1719ac327dca1fc639fd87468305fccebbe3d56f67aff
generated_token_ids = 28,665,436,253,1838,8180,3365,14176,30,2306,4161,281,253,2066,2291,351
CIS2_REF (witness digest) = a0c563ef804f50413b7fb6619ae4afe9b51b1ffa7655e944221393e85d6261da
```
Superseded by the v0.3b vector above; `scripts/self_check.sh` now targets
v0.3b's `CIS2_REF`.
**Note:** the informative 128-token, Qwen2.5-0.5B, and scale/horizon
vectors below were generated and confirmed against spec v0.2 only; they
have not been re-run against v0.3b as part of this port.
## GPU confirmation of the §13.1 normative vector
The `CIS2_REF` value above was reproduced bit-for-bit by an independent CUDA
implementation on an NVIDIA Tesla P100 (sm_60) on 2026-09-08, alongside a
byte-identical per-step trace. Full result, scope limits and provenance:
`docs/GPU_RESULT.md`. One further informative vector was pinned by that run —
the same model and prompt at a longer horizon:
```
SmolLM2-135M, "Once upon a time", gen_toks=128, spec v0.3b
CIS2_REF = 22f69ad87a615d66a77efaca8b1172d22bdfb4bd5092ceffd302e35669a050f6
```
Two further digests from that run belong to a **candidate** pinned-tree
reduction order that is not part of v0.3b and is not normative; they are
recorded in `docs/GPU_RESULT.md` only.
## Informative: 128-token prompt set (SmolLM2-135M, spec v0.2)
Five prompts of varying length, `gen_toks=128` each, confirmed identical
between x86_64 and aarch64 CI runners. These are informative
cross-ISA evidence, not §13.1 normative test vectors.
| prompt_idx | prompt_toks | `CIS2_REF` digest (`gen_toks=128`) |
|---|---|---|
| 0 | 4 | `e8d4f83fe623c329e2a56acb0efb0aa11614eda168e009ffcd014da110d5ac7d` |
| 1 | 11 | `e805baec6a932ff74d933ff0b51df045a75603f5409536a5325e46ab5a7ccc05` |
| 2 | 11 | `cf1ef40e0fda59fc72218e8f7daa9935e3f15083a1d92c4cde9729d8b015b803` |
| 3 | 19 | `ee1247798e49f766adf10b64fb9cce07ee9cf80a34394e5e38c47485939c6c01` |
| 4 | 215 | `135f50b5850e9e7bf31ee4fd9b935a002c7627cce6e1b7260e665e726c2c450b` |
## Informative: Qwen2.5-0.5B (theta-general RoPE exercise, `rope_theta=1000000`)
Not a §13.1 test vector; exercises §7's general RoPE construction against
a second model family with a different `rope_theta` and vocab size.
| gen_toks | `CIS2_REF` digest |
|---|---|
| 16 | `2c9f623589520aba9cc557edf53185808086f5f6f81cab5e78ee136d0375344c` |
| 128 | `dccd55e68a44eae3d62e36092295b40f980a07e1be72aadf37fe14ca306b20e7` |
## Scale/horizon evidence: Qwen2.5-1.5B and SmolLM2-135M at longer horizons
A later hardening pass confirmed x86_64/aarch64 digest equality (not
listed here as literal hex — the source report records pass/fail
assertions, not the raw digest values) for:
- Qwen2.5-1.5B (~1.5B parameters) at `gen_toks` = 16, 128, and 512, plus a
PyTorch fp32 oracle comparison at 16 and 512 tokens.
- SmolLM2-135M at `gen_toks=512`.
These are cited here as evidence of scale- and horizon-robustness, not as
reproducible literal digests in this document; a reproducer wanting exact
hex values for these cases should regenerate them by running the
reference construction at the stated (model, `gen_toks`) pairs and
checking x86_64 vs. aarch64 equality directly, per §13.2 of the spec.
## Sources
- Reference-implementation CI results and hardware logs (private
repository, not included here — see README "Scope").
- `docs/E15j_CLEANROOM_C_RESULT.md`-equivalent CI run (C clean-room,
`verify3/`), CI run id `33200155942` (post-§12.1-fix, 4/4 bit-exact on
x86_64/aarch64 x gcc/clang).
- Rust clean-room (`verify2/`) CI run id `33194049057` (spec v0.2, both
ISAs).
- Cross-ISA/compiler-invariance matrix CI run id `33195649908` (20/20
cells).
- Longer-horizon/scale hardening CI run id `33214545380` (9/9 jobs).
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