Ask Matt was missing five skills that now exist and are user-reachable:
tdd (the red-green engine implement drives), diagnosing-bugs (there was
no route for "something's broken"), domain-modeling and codebase-design
(the two vocabulary references), and grilling (the shared primitive).
- SKILL.md: add a "Something's broken" on-ramp for diagnosing-bugs, a
"Vocabulary underneath" section for domain-modeling/codebase-design,
weave tdd into the main flow, flesh out prototype, broaden the
description from "user-invoked skills" to "the skills".
- docs/engineering/ask-matt.md: re-sync the framing to match.
- CLAUDE.md: add a maintenance rule so any future skill change triggers
an Ask Matt re-check, beside the existing docs-page re-sync rule.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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