CREATURE_FORGE_PLAN Part 3. `new` prints a spec as source in the shape the
bestiary files are written in, `explain` prints the rule behind every value,
`measure` fights it against the party check-lethality freezes, and `list`
shows the knobs.
The derivation is forge.mjs at the ROOT, beside rules.mjs and postings.mjs
and under the same law: pure, no Foundry, no catalogues. Part 5 asks for an
in-Foundry panel that forges a variant at the table and says it must not
diverge from the CLI. One derivation in a module both import is the only way
to guarantee that rather than argue it.
Natural attacks now declare which body plans can make them, in the weapon
catalogue, for the same reason a weapon already names the skill that fires
it: the weapon is the thing that knows. Anatomy cannot answer it — a body
plan records that a creature has a head, not that the head has horns.
`explain` earned itself on the first run. A large brute derived with a
baseline body could not gore, trample or hoof, and the trace said so; the
finished statblock alone would have shipped bulls that bite. The role picks
the body now, a non-baseline species overrides it, and --body beats both.
check-forge (guard 26) derives all 450 combinations of role, size, tier and
species and puts each through the bestiary's own validate(). Three mutations
were planted in the forge to test it, and it caught one. Dropping the seed
was caught. Dropping the brawl grant was a genuine no-op, since every role
already lists brawl. Dropping the body-plan filter left all 450 rows green
while the success line read "armed with something its body can use" — the
guard read the location table and never used it. It checks each issued weapon
against the catalogue's own declaration now, and the same mutation produces
500 failures.
check-rules' inline-armour pattern matched any clamp containing the word, and
false-positived three times in one evening on counts that were never damage.
damageAfterArmour is a subtraction, so the pattern requires one. A guard that
makes people contort working code to keep it quiet is training them badly.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
