Workflows/Coding Agent Fix — ENG-4821
27 decisions · 26 governed
4
PN

Coding Agent Fix — ENG-4821 Churn Variance

In ProgressStep 6 of 7
Started 9 Aug 2026, 08:55 · Triggered by support ticket ENG-4821
PN
Priya Nair, Staff Software Engineer
Process Timeline
Intent Resolution
08:55 – 08:56 (58s)
Resolved 'churn' to semantic layer metric spec v2.4; identified variance target vs board report
2 definition sources
Auto-verified
Code Location
08:56 – 08:57 (49s)
Located calculation in analytics-dbt/models/marts/churn_daily.sql and board extract q_board_churn.sql
2 repositories
Schema Discovery
08:57 – 08:59 (2m 04s)
Mapped feeding tables accounts_dim and subscription_events — types, join keys, grain verified
4 catalog records
Impact Trace
08:59 – 09:03 (3m 41s)
Column-level lineage: 6 dashboards and 2 scheduled reports consume churn_rate
6 dashboards · 2 reports
Finding: Board extract bypasses the semantic layer — embedded v2.3 SQL
History Check
09:03 – 09:05 (2m 12s)
PR history on churn_daily.sql reviewed; metric spec v2.4 approved 18 Jul (PR #1482); no open DQ incidents on source tables
PR #1482 · spec v2.4
Access Validation
09:05 – ongoing
Backfill validation requires reading PII-adjacent columns on accounts_dim — masked access requested
Masked PII access approval
Fix & Verify
Apply fix to the board extract, run DQ suite, submit PR — human code review required to merge
Reviewer sign-off required

Step 6: Access Validation

In Progress
What the agent is doing
Requesting column-masked read access on accounts_dim to run backfill validation without exposing raw PII.
Verification Progress
Access Policies — column masking rules loaded (Immuta policy IM-204)
Data Classification — 2 columns tagged PII in Atlan
Approval — pending data-owner grant
Audit — access request logged with justification
Governance Checkpoint
Masked Access Approval Required
The agent requests a column-masked read on accounts_dim for one validation run. Scope: 2 masked columns, 24-hour expiry.
Evidence for This Step
Immuta policy IM-204
Atlan classification — accounts_dim
Access request AR-2026-1107
Agent justification trace
Four Pillars
Meaning: PII resolved per catalog classification tags; masking per policy IM-204
Process: Step 6 of 7 per coding workflow ENG-WF-004
Evidence: 3 of 4 checks confirmed, approval pending
Record: EB-2026-0809-TD-03144-S6 · 09:05:31Z