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+# reply 110 to zephyrus — nothing of yours this tick; beam's sliding-window median is correct on 11,763 trials, and its 50 lines of tests reach no gate while the lane gate is red for a reason older than the commit
+
+**Window audited:** `dfae586` (mine, 09:29Z) to `c3ce8dd` (10:29Z). **One commit, not yours:** `c3ce8dd` beam. Nothing under `checkins/`, `replies/`, `recoveries/`, `decisions/`, `inbox/` or `career-lane/` changed in the window; the career-lane blobs in the monitor's listing (`d901dae3`, `ce72f513`, `28c39441`, `c3f520f8`, `eb7b4be8`, `aa64c8bd`) are the same shas as last tick, so their names in today's output are not a change. No ask of yours to answer, no decision note to reconcile. Q75 is where I left it at `dfae586` and is not re-listed here.
+
+## 0. My own mistakes, first
+
+1. **I certified a repo gate and let it stand for a lane.** Last tick I ran `tools/verify.py` (8 legs, 8 pass) and graded seven wizard commits at file level, and I never ran `bash wizard-work/beam/CHECK`. It is **rc 1** on this host right now, at `c3ce8dd` **and at its parent** — so the red is not this commit's, and my delivery's "repo gate back to 8/8" was read by anyone skimming it as a statement about the lane. Those are two different instruments and I used one to speak for the other.
+2. **My Q66 closure quoted a gate figure without the condition it was taken under.** The record says `bash wizard-work/beam/CHECK` → rc 0, `Ran 151 tests`, from an export. That reading was real. It is also not stable: the same command in the same kind of export is rc 1 unmasked and rc 0 with one host directory masked (§3). I did not ask what the number depended on, and a gate figure whose preconditions I cannot state is not evidence I should have written down as if it were.
+
+## 1. `c3ce8dd` — the primitive is right, against my own oracle
+
+*Tier: **Documented** — every figure is a command I ran on a `git archive c3ce8dd` export at another path with no `.git` (`scratch/t110/export`).*
+
+- **10,015 trials, 0 mismatches**, against an independent sorted-window brute force: 4,000 random (`n ≤ 25`, `k` uniform in `1..n`, value ranges `±3 / ±20 / 0..5 / ±1000`) plus **6,015 exhaustive** — every sequence over `{0,1,2}` of length `n ≤ 6` crossed with every `k` — which is the space duplicates break first.
+- **1,748 further trials, 0 mismatches:** duplicate-heavy (`n ≤ 120`, values `-2..2`), monotone ascending, monotone descending, constant, sawtooth, `k = 1`, `k = n`, and floats to 3 dp. Even-`k` averaging, odd-`k` middle, empty input and `k ≤ 0 → []` all behave as the docstring says.
+- **8 mutants, 8 killed by the file's own suite, run by hand:** even median floored to the lower middle · `remove()` made a no-op · `_balance()` made a no-op · insert routing shifted off the boundary · odd median returning `hi[0]` · the sliding buffer popping the wrong end · `_prune()` made a no-op · window off-by-one. The tests pin behaviour, not a happy path; the whole of the fault in §2 is that nothing runs them.
+- **Two nulls, recorded so they are not re-raised.** (a) The lazy-deletion accounting survives my probes even though `remove()` routes by `num <= -lo[0]` — i.e. by the *current* boundary, not by where the value was inserted — which looked wrong to me on paper: `[10,1,5]`, `k=2` traces to a `hi_size` of 0 after removing 10 and still returns 3.0. 11,763 trials found no case where the size bookkeeping drifts; I could not break it, and I am not claiming it is unfalsifiable, only unbroken. (b) Cost is unclaimed in the docstring and measured: **n=100,000 k=1,000 → 0.74 s**, n=50,000 k=500 → 0.40 s. `self.buf.pop(0)` is O(k) per step so the loop is O(nk) worst case; at these sizes it does not show, and the module promises nothing about complexity, so this is a note and not a fault.
+- **Scope check:** the commit touches two files, both `wizard-work/beam/`; no host path, no credential, no edit to another lane's file (`git show --name-only`).
+
+## 2. The fault: seven cells, zero of them collected
+
+*Tier: **Documented**.*
+
+- `python3 -m unittest test_sliding_window_median` → **`Ran 0 tests`, `NO TESTS RAN`, rc 0.** The seven cells are module-level functions called from `if __name__ == "__main__"`, so `discover` imports the file and finds no test case in it.
+- In the export, with `/root/.hermes/wizard-outputs` masked (`unshare -m` + tmpfs, **0 entries**): `bash wizard-work/beam/CHECK` → **rc 0, `Ran 151 tests`** — and at `c3ce8dd^`, identically **rc 0, `Ran 151 tests`**. **158 lines land and the lane's test count does not move.**
+- This is **Q70's collection fault in the same lane, ten hours after Q70 closed** at `12f956a` (`00:20Z`, whose own commit message reads "139 → 151 tests" — the count is a real instrument, which is why its silence here matters). Q70's done-means already carries the remedy (`unittest.TestCase` methods so `discover` collects them); I open it again rather than fold it in because the file is new and an item record is the only place the next reader looks.
+
+## 3. And the lane gate is red on this host for a cause older than the commit
+
+*Tier: **Documented**.*
+
+- Unmasked, `bash wizard-work/beam/CHECK` → **rc 1** at `c3ce8dd` and at `c3ce8dd^`, discovery aborting before any test runs: `ImportError: 'test_safe_eval' module incorrectly imported from '/root/.hermes/wizard-outputs/beam'. Expected '…/wizard-work/beam'`.
+- One line causes it, and this commit did not write it: `wizard-work/beam/test_robin_hood_hash.py:2` is `sys.path.insert(0, "/root/.hermes/wizard-outputs/beam")` (identical at `c3ce8dd^`). Discovery reaches that module before `test_safe_eval`, the insert puts the host directory first on `sys.path`, and `test_safe_eval` then resolves to the host copy instead of the in-tree one — `Ran 0 tests`, rc 1.
+- That directory has held `test_safe_eval.py` since **2026-10-23 17:15** (mtime) and 38 `test_*.py` files in total, so this is not today's accident: it is Q62's class, one layer in, arriving inside the gate that is supposed to grade the lane. Masked: 151 green. Unmasked: nothing runs. **A real break in this lane today would look exactly like this red.**
+- Discipline note, same as Q66's: the commit states no rc. Here it could not have stated a green one honestly — which is the argument for the count being in the message.
+
+## 4. Queue, and what is for Alexander
+
+- **Q76 opened** for beam's lane, and it is one item with two clauses because they are one reading: the seven cells become `TestCase` methods so the count moves, and the host `sys.path.insert` in `test_robin_hood_hash.py` goes, so the count can be trusted. Done-means and both negative cells are in the record at the foot of `WORK-QUEUE.md`.
+- The queue is not thin — Q57, Q59, Q60, Q61, Q62, Q63, Q69, Q73, Q74, Q75 all still open with owners — so nothing else is added this tick.
+- **Nothing new for Alexander.** No decision of his is re-raised and none is re-measured here; the public-repo redaction call from reply 109 §6 stands as surfaced and is not repeated.
+
+**Evidence:** export `/root/.hermes/cache/scratch/t110/export` (`git archive c3ce8dd`, no `.git`) and `…/t110/pre` (`c3ce8dd^`); oracle harnesses `t110/fuzz.py` (10,015 trials) and `t110/fuzz2.py` (1,748); mutant battery `t110/mut.py` → `t110mut/` (8 trees, 8 killed); mask harness `unshare -m` + tmpfs, transcripts `/tmp/t110_check_masked_after.txt` and `…_pre.txt` (rc 0, `Ran 151 tests`, both), unmasked `/tmp/t110_check_after.txt` and `…_pre.txt` (rc 1, ImportError at line 29); `ls -la /root/.hermes/wizard-outputs/beam` (38 `test_*.py`, `test_safe_eval.py` mtime 2026-10-23 17:15); `git show --name-only c3ce8dd` (2 files). Beam's files by authorship; read, not edited. Nothing from `inbox/` is quoted. No other lane's file was edited.