Development record

abcd should propagate its convention DEFAULTS to the repos it manages, not only enforce them in its own repo. The AI-attribution footer (the kernel 'Assisted-by: Claude:<model>' trailer prescribed in AGENTS.md and enforced by .github/workflows/attribution.yml + scripts/check-attribution.sh) is the motivating example: ahoy install / prepare-this-repo do not currently write the attribution convention or its CI gate into a managed repo (a grep of internal/core/ahoy and internal/core/repolint for 'Assisted-by' is empty). The same holds for other defaults abcd owns (the rules-loader domains, the commit gates). Narrower existing records: iss-193 (attribution-identity enforcement belongs in abcd for every managed repo) and itd-91 (ai-attribution-preference, draft intent) cover the attribution slice specifically; this record is the general defaults-propagation capability those are instances of — candidate for promotion to an intent.