The two AM-4 budgets had the SAME scope -- one package, no dev edges --
while claiming to bound different things. AM-4b now measures the
workspace with dev edges: 57 crates / 725,258 lines where it read 29 /
317,021, having been blind to 28 crates and 408,237 lines, more source
than its own target.
Target 745,000, ~2.7% of room -- the same margin ADR-0008 D3 gave AM-4a,
applied to a number that grew because the instrument was repaired, not
because anything was added. The target moved to fit the measurement.
T02: proc-macros are COUNTED here and excluded from AM-4a, on purpose.
AM-4a asks what ships and a proc-macro never ships. AM-4b asks what is
acquired, and ADR-0007 D3's acquisition rule counts what the build
fetches -- 'it does not ship' is no answer to 'we downloaded it'. When
the rules disagree, the question each budget asks decides. Measured
share 109,585 lines / 15.1% against AM-4a's 36.2%, so ADR-0008 D2's
refusal to borrow the ratio was right by more than a factor of two.
Caught by this project's own earlier work twice: the mutation
find-string went stale and --self-test reported it BUILD-FREE (the check
CB-WP-0015 added after AM-4a's rotted for two passes), then the DFD gate
caught facts.toml carrying the old numbers.
CB-EV-0001 and ADR-0004 carried live fact: tags on historical readings.
A dated record asserting a CURRENT value is a category error, so those
occurrences are marked as-measured instead of retro-edited, and ADR-0004
gains a supersession note.
make all exits 0.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
ADR-0008, tier M (survey and ADR merged).
D1 — SH-3 retired as a gate, kept as a diagnostic. Investigating it
found a third defect, deeper than the two this pass was declared on.
Re-deriving batching from the raw transcripts, independently of cb-cost:
CB-WP-0011 pass 54 with tools 0 batched 0.0%
gap -> next decl 16 with tools 6 batched 37.5%
CB-WP-0012 pass 86 with tools 0 batched 0.0%
gap -> next decl 10 with tools 1 batched 10.0%
CB-WP-0013 so far 10 with tools 0 batched 0.0%
Zero batched turns in 150 in-pass responses; 37.5% in one gap, above the
20% floor. Batching needs two calls whose inputs are known at once —
orientation work. Implementation consumes each step's result before the
next. SH-3's window is since the last commit, which during a pass is
always implementation. The metric could not read above ~0% in the window
it was gated on. A floor the window structurally excludes is not a
target.
This pass's own declaration was also wrong: it claimed batching "has got
worse" (7.8-8.6% vs 1.1-6.3%). Differently-placed windows, not different
behaviour. Withdrawn — the same class of error, in the pass written to
correct it.
Not retargeting to match the measurement: the floor was not moved to 6%,
the gate was removed on an argument about what the quantity is worth.
The number is still reported; only the verdict is gone.
D2/D3 — AM-4a counts --edges normal,no-proc-macro: 157,202, not 246,250.
The target moves down with it, 250,000 -> 161,000, so the correction
hands back essentially nothing (headroom 3,750 -> 3,798). Three controls:
the exclusion drops exactly the five expected crates, only removes and
never adds, and is not a no-op.
The DFD gate then caught the follow-on it exists for — three historical
documents carrying live fact tags for a number that had changed. Not
rewritten; untagged, with a supersession banner.
AM-4b is deliberately not corrected: its proc-macro share is unmeasured.
gate-review now reads 0 due, 0 silent, 0 drifted — GATE-REVIEW earns its
first caught entry by forcing SH-3's re-justification, and the registry
has no silent gates left.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Duplicated-fact drift is the fourth error class and the only one with no
executable rule. No positive control catches it (both copies are
internally consistent) and re-derivation does not either (the copy
reproduces whatever it was copied from). It is caught only by reading a
copy against its source, which nothing in the loop required.
facts.toml holds 15 facts and is GENERATED by `make facts-gen` from
cb-cost, dep-weight and rule-coverage. The trap this task named — a
hand-maintained registry that becomes another drifting copy — is closed
by facts-check re-running the instruments and failing when the committed
registry disagrees with them. A stale registry cannot certify stale
artifacts.
An artifact quoting a fact tags it: **$93.15** <!-- fact --> with the key.
17 occurrences across 5 artifacts are now checked.
Falsified before being believed: changing CostAccounting.md line 158 from
$93.15 to $92.87 — the exact historical drift — produced exit 1 naming
the file, the line and the expected value. Tested against the class it
exists to catch, on a real artifact, not only in its self-test.
It then caught a live tag inside its own documentation example in
InnerLoop.md within the hour. Third time a gate has failed on its own
pass's work.
What it does not close is stated rather than implied: 22 untagged literal
copies remain and are reported, not failed. Tagging is opt-in, a number
can legitimately recur, and a gate that fires on coincidence gets routed
around. Naming the uncovered surface beats claiming the class is closed.
InnerLoop single-source-of-fact moves from prose to executable — v1.3.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Discharges the open item T07 raised. Values unchanged at 250,000 and
350,000; what was missing was a reviewed decision behind them, since
they had been set by the implementer in the commit that measured them
and that also changed the feature gating being measured.
The ADR supplies the argument T07's test requires -- why the targets
bind on FUTURE work rather than merely passing present work:
AM-4a leaves 3,750 lines of headroom (1.5%), about one small crate,
so any new shipped-runtime dependency breaches it almost immediately.
That is intended: the shipped runtime should be effectively frozen.
AM-4b leaves 32,979 lines (10.4%), deliberately looser -- dev tooling
should absorb one moderate dependency without a spec change, not two.
Both are ceilings on a quantity that only grows by choice. Nothing
drifts across them; only adding a dependency does.
Falsification condition stated: if a later pass raises AM-4a to
accommodate a dependency it wants, that is the failure the ceiling
exists to catch, and the answer is an ADR arguing for the dependency.
First ADR written under the correction/retarget test; sets the shape.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
