Documents a recommended (not plugin-enforced) frontmatter marker for
files under `design_models` / RFCs / proposals:
`status: aspirational` + `validated-against: <sha|"no validation">`,
plus a recommendation that the design ledger distinguish model rows
from contract rows mechanically.
Wires the brainstorm skill to consume the signal: Step 1 notes the
marker when reading model files, Step 4 flags code lifted from an
aspirational source as the spec's most suspect bytes that must clear
the Step-7 parse gate. This is the upstream signal whose downstream
catch is the Fix-1 parse-every-block gate. Adds a Common
Rationalisation and a Red Flag. Missing marker -> signal absent,
graceful degradation, never a hard fail.
Closes the issue #1 hardening set (P0 + Fixes 1-5).
refs #1
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Brummel
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