* test(#3895): no shipped agent may hardcode a model frontmatter pin (failing first)
* fix(#3895): delete the mempalace-curator's model frontmatter pin — the fleet's only hardcoded model
Exactly one of the 34 shipped agents carried 'model: sonnet' in its
frontmatter; every other agent resolves through the model-profile
system. The ship:post dispatch (#2684) resolves per-hook and — per
#2517 — deliberately OMITS model= on inherit so the agent inherits the
orchestrator's model; the frontmatter pin intercepted that inherit
case, silently forcing sonnet where all 33 siblings would inherit, and
operators could not durably remove it (install rewrites live copies
wholesale).
Deleting the line changes nothing for default profiles — the catalog
entry (model-catalog.json agents.gsd-mempalace-curator:
golden/balanced sonnet, budget haiku) preserves today's behavior —
while restoring model_overrides and inherit authority. Pinned by a new
agent-frontmatter guard: no shipped agent may hardcode a model pin,
and the catalog entry must keep existing so the pin's deletion can
never orphan the agent.
* chore(#3895): changeset fragment (pr number backfilled after PR creation)
* chore(#3895): backfill changeset PR number (4048)
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Co-authored-by: sim <sim@local>
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