Server-assigns a uuid4 id to every AI-generated node (Finding 1 showstopper:
nodes had no id but the advance protocol keys on node_id, so ai_build walks
never advanced past question 1). Replaces the hidden {"node_type":"meta"}
walked_path convention with real category/problem_text/pending_node columns on
l1_walk_sessions (migration 61dda4f615c6) — fixes junk proposals + off-by-one
depth cap (Findings 8,9), and pending_node replays the served node on re-mount
(no duplicate paid LLM call). Intake honors explicit flow_id and adhoc=True
(Findings 4,5); flow_proposals.l1_session_id FK -> CASCADE (Finding 6 time
bomb); L1 category GET is owner+admin like PATCH and require_account_owner_or_admin
delegates to User.can_manage_account (Finding 7); escalate falls back to default
recipients + filters deleted_at + warns when empty (Finding 10). Cleanups: dead
ticket_ref removed, IntakeResponse per-outcome validator, unused acknowledged
dropped, escalations partial index, restored a deleted audit assertion.
Full Phase 2A backend set: 110 passed / 0 failed.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Teaches l1_walk_sessions a new session_kind='ai_build' for AI-generated
decision-tree walks. FK shape matches adhoc: both flow_id and
flow_proposal_id must be NULL. Drops and recreates the two affected CHECK
constraints (session_kind allowlist + target_consistency). Migration
beca7464b6b4 chains from b3358ba0e48c.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
Aligns the model with the migration (T6 review caught: migration creates
ix_l1_walk_sessions_last_step_at but model annotation was missing, causing
schema drift if Base.metadata.create_all is used in tests).
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
