T07: InnerLoop v1.1 — the instrument must emit its own target

Answers the question the workplan posed: did v1.0's "every metric names
its instrument" rule stop a metric being written without a working
instrument? No. AC-1 named `cb-cost --pin` before that tool existed and
set a hand-computed target of $92.87; the tool returned $93.32. The rule
was satisfied completely and the metric was still wrong.

v1.1 adds:
  - the instrument must exist and the target must come out of it;
    targets are provisional until the tool emits them
  - a number inherited from earlier work is re-derived before use as a
    target, or cited as unverified
  - every reporting tool exposes --self-test, run before the number
  - cost is in the definition of done; M-D2-CST may not be uncomputable

The cost of CB-WP-0001 was stated four times before it was right --
$248.46, $92.21, $92.87, $93.32 -- and each correction came from a
different mechanism: re-derivation, adversarial review, and the positive
control. None found more than one. That is the case for keeping all
three.

CB-WP-0003 T10 predicted the next error would be harness-does-nothing.
It was not, twice. Trusted arithmetic over real data would pass a
positive control; and a property verified on 206/206 groups of the main
transcript is false in the 8-response subagent tree that neither the
survey nor the reviewer examined separately. Review structurally cannot
catch the second -- re-deriving on the same sample reproduces the same
blind spot.

Workplan status: done.

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

workplans/CB-WP-0002-cost-accounting.md

@@ -1,7 +1,7 @@
 ---
 id: CB-WP-0002
 title: "Make agentic cost measurable, so D2 claims are falsifiable"
-status: proposed
+status: done
 state_hub_workstream_id: "b7c22f69-fbe9-48df-9619-007db79ae338"
 ---
 
@@ -207,7 +207,7 @@ the one command surface.
 
 ```task
 id: CB-WP-0002-T07
-status: todo
+status: done
 priority: low
 state_hub_task_id: "ebe58d91-be5f-4d5b-ba40-b03275b4eefc"
 ```