05 — DOT / no-hardcode / five-layer

DOT — PASS, 84/84

Migration 015 adds 2 tables + 3 views + 10 functions + 1 config gate. runtime/110's SSOT inventory _iu_core_expect and the D9 verdict counts were bumped in the SAME commit: table 12→14, view 9→12, function 24→34, config 5→6. The D8 drift-guard table shape gained iu\_piece%.

runtime/110 live scan after all changes — D9 conformance:

class	expected	found	ok
table	14	14	t
view	12	12	t
function	34	34	t
trigger	3	3	t
config	6	6	t
event_type	7	7	t
route	8	8	t

84/84 PASS, D8 drift guard 0 rows.

No-hardcode — PASS

• 015_piece_native_composer.sql — 0 uuid literal, 0 secret/api-key/DSN/IP. The collection_kind / piece_role / source_axis_kind / lifecycle_status sets are CHECK-constrained domain vocabulary.
• runtime/250 discovers its document + pieces by live query (GROUP BY doc_code ORDER BY count(*), ORDER BY sort_order) — nothing baked.
• sandbox/100 uses gen_random_uuid() for probe addresses.
• composer.py — COMPOSER_COMMANDS / vocabulary frozensets are contract constants; no DSN/host/secret.
• Repo-wide scan of the new files: 0 secret / DSN / api-key / private-key / IP; 0 uuid literals in 015 / runtime/250 / composer.py / text_as_code.py.

Five-layer sync

Layer	Impact
PG	Real additive change: migration 015 (2 tables / 3 views / 10 functions / 1 config); runtime/250 (+1 collection, +3 memberships). No information_unit / tree / metadata / route change.
Directus	No collection/field DDL — iu_piece_collection / iu_piece_membership are IU-core sidecar tables. No Directus-collection data change.
Nuxt	Render-only — the composer read surfaces (v_iu_collection_manifest / _envelope / _health, fn_iu_collection_render) can power a future file-builder UI. No component contract change.
AgentData / KB	This macro's 7 reports under v0.6-iu-core-240x-piece-native-authoring-composer-textcode-autocut-delivery-open-goal/, uploaded + list/read/search-verified.
Qdrant / vector	No impact. A composition's manifest_digest + ordered piece set is a natural future vector-indexing unit; deferred.

Reversibility

• Migration 015 → rollback/015 (drops all 16 objects + the gate; refuses a non-empty table).
• The runtime/250 pilot → runtime/rollback/250 (deletes the 3 memberships + 1 collection; information_unit untouched).
• Gate dot_config 'iu_core.composer_enabled' — false by default; closing it makes every mutating composer function refuse.
• iu_piece_membership removals reversible; iu_piece_collection rows can be deprecated/retired.