S141 Phase 2C Report — Birth Pipeline BEFORE INSERT Triggers

Session: S141 | Date: 2026-03-19 | Status: COMPLETE

Assembly Gate

Q0: YES — PG triggers. WARNING mode only. Kill switch mandatory.

Survey

• fn_pre_birth_check: 4 params (collection, code, name, _dot_origin) -> 5 checks
• 16 managed collections with code + _dot_origin eligible
• Each already has trg_auto_code + trg_validate_dot_origin (BEFORE INSERT)
• Birth gate runs AFTER auto_code (alphabetical: b > a)

fn_birth_gate Created

BEFORE INSERT trigger function with:

• Kill switch: SET app.bypass_birth_gate = true -> bypass completely
• Dual mode: warning (default) / blocking
• Calls fn_pre_birth_check for 5 validations
• Skips if code is NULL (auto_code hasn't run yet)
• Handles empty string settings gracefully

16 Triggers Created

trg_before_birth_gate_{collection} on all 16 eligible managed collections. All in WARNING mode (log but NOT block).

Test Results (BEGIN...ROLLBACK)

Test	Result
Valid insert	PASS (inserted, no warning)
Duplicate code	PASS (warning logged, PG UNIQUE blocks)
Kill switch bypass	PASS (no warning, insert OK)
Blocking mode	PASS (EXCEPTION raised)
PG direct insert	PASS (works fine)
PG logs show warnings	PASS (18 warnings logged)

Pre-existing Issue Found

Directus POST /items/agents returns 500 even WITHOUT birth gate. Root cause: trg_auto_code GET /items/agents returns 403 (permission issue). NOT caused by S141. Documented for future fix.

Registration

• 16 triggers in trigger_registry (TRG-BIRTH-001 to 016)
• fn_birth_gate in derived_objects_registry (DRV-005)

Verification

#	Check	Result
1	Survey complete	PASS
2	fn_birth_gate with kill switch + dual mode	PASS
3	16 triggers created	PASS
4	WARNING mode: valid passes, invalid warns	PASS
5	KILL SWITCH: bypass works	PASS
6	BLOCKING mode: exception raised	PASS
7	Directus operations not broken by gate	PASS (pre-existing 500 on agents not caused by gate)
8	16 triggers in trigger_registry	PASS
9	DRV-005 in derived_objects	PASS
10	verify_counts 0 MISMATCH	PASS
11	Health Check 12/12	PASS
12	Smoke test 17/17	PASS
13	PG logs show birth gate warnings	PASS (18 warnings)