# Lane L1 — the turn-begin RNG run, 2026-09-08

Instrument: `sots-engine` `wip/l1`, build `0117495-dirty-20260908T2113Z`. Findings:
`findings/control-flow/hive-creation-rng.md` and `findings/subsystems/snlv-measured.md`.

| file | what |
|---|---|
| `trace-et1.jsonl` | `l1-turn1.sav` (= `verify/results/saves/turn1-state.sav`) + **one** End Turn — the hive-creation turn. `SVSOSwarmQueen::RegisterHives` words 170 → 172. |
| `trace-et2.jsonl` | the same session after a **second** End Turn; the second bracket is 192 → 211 with a residual of 0. Supersedes `trace-et1.jsonl`, which is kept because it is the record as it stood before the control turn existed. |
| `trace-oracle.jsonl` | `ref-turn2.sav` + one End Turn with the same build and config. This run reproduced the determinism oracle byte for byte (`bb4fd9ac…` / `978041ac…`), so it is the rule-19 control for everything in the other two. |
| `watch-arm.txt` | the `watch.mode=snlv` arming sweep: all 28 systems with `AFlags`, `SnLv` and the decoded per-player 2-bit contact levels, plus the canary self-test. |
| `watch-hits.txt` | 24 hardware watchpoint hits — 20 writes to Spica's `SnLv` (all from 0x0086a789) and 4 to its `NVO` record's `{touched, TShn}` pair. |
| `saves/l1-t1t2-post.sav` | post-turn autosave of the hive-creation turn, **full L1 hook set**. |
| `saves/l1-t1t2-post-hooksoff.sav` | the same turn with **`hooks=off`, nothing installed**. It differs from the line above AND from the historical `turn2-state.sav`, in one field: player 3's `ResTNm`. See the finding's §6.1 — this pair is why `turn1-state.sav` must not be used as a determinism oracle. |
| `saves/l1-t2t3-pre.sav`, `saves/l1-t2t3-post.sav` | the second bracket's two autosaves. |
| `rep.py` | the reader used for every table in the finding: prints each record's hook, depth, `rng` word delta and non-pointer arguments. `uv run python3 rep.py trace-et2.jsonl`. |

## Added later the same session

| file | what |
|---|---|
| `trace-playforward-f51.jsonl` | `ref-turn2.sav` played forward **49 End Turns** to frame 51, `shim.cfg.l1hive`. One `UpdateDifficultyTier` record per turn. |
| `cdiff-frames-2-51.txt` | that trace reduced by `cdiff.py`: 50 entries, **exactly two stores** — frame 2 (`CDiff` −1 → 0) and **frame 50** (0 → 1) — and 47 turns on which the writer ran and wrote nothing. |
| `cdiff.py` | the reducer. `uv run python3 cdiff.py trace-playforward-f51.jsonl`. |
| `trace-seed-proc1.jsonl`, `trace-seed-proc2.jsonl` | the AI seed probe: `l1-turn1.sav` loaded in two freshly launched processes under `shim.cfg.l1seed`, hooks on `Mars::RNG::Seed` and `StrategyApp::RunAI`, **no End Turn**. |
| `seed-two-processes.txt` | both rendered side by side. Every AI client seed differs; the structure does not. See `findings/subsystems/ai-client-seed-is-per-process.md`. |
| `seedrep.py` | the reader for those two. |

**The VM was left as it was found:** the 8-file `SavedGames` set with the oracle bytes
`(Autosave).sav` = `978041ac…`, `(Autosave EndTurn).sav` = `bb4fd9ac…`,
`(Autosave Backup).sav` = `978041ac…`, and the working file `l1-turn1.sav` removed.