feat(frozen-bundles): the measurements read a pinned copy, not another repo's build dir

Measured 2026-09-17 17:43: vegnormal-okf rebuilt build/ferdig/r761-2025 while this
repository's v1 gate, the stress judge and four corpus tests pointed straight at it.
Rows 6-7 went IKKE MAALT and five tests fell, for a change no one here made. The failure
mode was never falsehood - the gate says IKKE MAALT and exits non-zero, never green - it
was instability: two projects shared a directory neither owns, so what this repository
MEASURES could move without a commit here.

A copy alone would push that directory one move away, so the copy comes with a pin.
frozen_bundles.json (tracked) carries path + sha256 + file count per base; the bundles
themselves are NEVER committed here. Three states, separated by construction: match ->
resolves; gone -> FrozenBundleMissing (an OSError, so the gate's existing except OSError
gives IKKE MAALT + exit 1 unchanged and the corpus tests SKIP, MAJOR-3's ceiling); drift
-> FrozenBundleDrift (a ValueError), loud, named, and never a skip. The two classes are
deliberately unrelated: a caller that catches "missing" to skip must not swallow "drift".

The NAME is hashed alongside the bytes, and the directory name carries the first 12 chars
of the digest so a stale copy is visible in ls. Renewal is a decision: new copy + new pin
in the SAME commit (README). --bundle-root / PORTFOLIO_VEGNORMAL_ROOT stays as the
operator's explicit, UNPINNED live mount.

Iron Law: the tests were written and run RED first (collection error, then two arms of my
own making). Load-bearing MEASURED, eight mutations all red against the WHOLE suite with a
green control of 1984 passed / 5 skipped / 5 xfailed and a strict node-id superset
(1977 -> 1994, 0 removed): M1 the pin is never verified (7) - M2 drift collapsed into
missing (5) - M3 the name is not hashed (40) - M4 the gate seam reverted to root/name (1) -
M5 the corpus helpers skip on drift too (4, one per file) - M6a the slash spelling back in
src (1) - M6b the quoted path segment back in a test (1) - M7 the directory name drops the
short digest (1, and 45 skipped, which proves absence is a SKIP and not a false green) -
M8 the explicit override ignored (3, two of them in test_stress_judge_loadbearing.py,
independent witnesses older than this work).

M2 FALSIFIED THE TEST FIRST: the four parametrised arms did not go red, they went to SKIP
(5 -> 9 skipped) and stayed green - pytest.skip inside a pytest.raises is not a failure.
The arm now catches pytest.skip.Exception explicitly and turns it into an AssertionError.

grep -rnE 'vegnormal-okf/build|["'"'"']vegnormal-okf["'"'"']' src tests contexts -> 0
(3 + 4 hits before; the three remaining prose mentions document history and are allowed).
Gate re-run against the frozen copy: identical to the live mount (rows 0/3 - 0/3 - 3/8 -
no report - 3/8 - IKKE MAALT - 1/20, exit 1).

Order 20260917T223645Z-1296211942-from-.claude.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

tests/test_v1_gate.py

@@ -22,6 +22,7 @@ from typing import Any
 
 import pytest
 
+from portfolio_optimiser import frozen_bundles
 from portfolio_optimiser.evals import v1_gate as gate
 from portfolio_optimiser.validator import UNSUPPORTED_REASON
 
@@ -678,12 +679,12 @@ def test_row6_measures_the_stress_outboxes_when_they_exist(tmp_path: Path) -> No
     """Against the real artefacts when this machine has them; otherwise the absence is named."""
     evidence = _CONFIG["stress_evidence"]
     root = _REPO / evidence["root"]
-    bundles = Path("~/repos/vegnormal-okf/build/ferdig").expanduser()
+    bundles = frozen_bundles.store_root()
     if not root.is_dir() or not bundles.is_dir():
-        m = gate.measure_stress(evidence, _REPO, tmp_path / "absent", bundles)
+        m = gate.measure_stress(evidence, _REPO, tmp_path / "absent", None)
         assert m.missing and m.validated == 0
         pytest.skip(f"stress artefacts not mounted ({root}, {bundles})")
-    m = gate.measure_stress(evidence, _REPO, root, bundles)
+    m = gate.measure_stress(evidence, _REPO, root, None)
     if m.missing:
         # The mount belongs to another repository and can be mid-rebuild; the gate then says
         # "ikke målt", which test_row6_missing_artefacts_are_never_zero already pins.