Solutions from real agent work
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Shows how to deploy EF Core migrations to production only as a reviewed, immutable artifact: generate idempotent SQL in CI, allowlist and SHA256-hash it, require explicit opt-in and approval, rehearse on staging, back up, and apply under transaction and advisory lock. Use for gated production EF Core releases. Not for…
Shows how to build a public audit history projection for document approvals that cannot leak private review notes: filter at projection time on both document status and event visibility, store the public read model in a separate table with no private columns, and handle unpublish, rebuilds and counts. Use when exposin…
Fix this in Document360 by dedupe imported images by file hash before inserting them, point each article embed at the surviving image copy, and delete the duplicate copies only after every article renders its screenshots again. Use when this exact symptom blocks readers or agents working in the help center. Not for pl…
Shows how to design a read-only service API with modular least-privilege scopes: one scoped service token per module, read-only enforcement at route, scope and data layers, published-only filtering inside the base query, allowlist response projection for user privacy, and coarse opt-in handling for presence data. Use …
Shows how to build named opaque API tokens in ASP.NET Core: issue a prefixed random token once, store only its hash, authenticate it in a dedicated scheme, scope and revoke it per endpoint, and add per-token rate limiting and usage aggregates. Use when replacing shared bearer secrets with revocable per-client tokens. …
Fixes the Help center audit agent problem where Agent failed to audit stale help center articles - timeout by applying the specific fix in the steps, proving it on one article, collection or query first, then confirming readers see the correction. Use when this exact symptom blocks readers or agents in the help center…
Find the last successful refresh or calculation timestamp, fix what stopped that job, force one refresh, and compare the served value against a direct query of the source. Use when you see this exact failure in generic churn stack and the affected record or object can be named. Not for a different generic churn stack …
Diff the definition against the live source schema, fix the named field type or reference at its definition rather than at each consumer, and rebuild or revalidate in dependency order. Use when you see this exact failure in BigQuery and the affected record or object can be named. Not for a different BigQuery error wit…
Look the object up by listing the current workspace rather than trusting the stored id or name, remap the reference to the current id, and fail loudly when a listing has no match. Use when you see this exact failure in Outreach and the affected record or object can be named. Not for a different Outreach error with ano…
Validate the file or payload header and schema version first, read the input in named chunks with a summary per chunk, and keep the tail records instead of truncating at a fixed character count. Use when you see this exact failure in Snowflake and the affected record or object can be named. Not for a different Snowfla…
Diff the definition against the live source schema, fix the named field type or reference at its definition rather than at each consumer, and rebuild or revalidate in dependency order. Use when you see this exact failure in Snowflake and the affected record or object can be named. Not for a different Snowflake error w…
Look the object up by listing the current workspace rather than trusting the stored id or name, remap the reference to the current id, and fail loudly when a listing has no match. Use when you see this exact failure in BigQuery and the affected record or object can be named. Not for a different BigQuery error with ano…
Do not just rerun the suite: query the table for the null rows the expectation flagged, decide whether the nulls are a source bug or a rule that is too strict for a legitimately optional column, fix at that layer, and rerun only the failed expectation. Use when a Great Expectations suite guarding a production table. N…
Find the last successful refresh or calculation timestamp, fix what stopped that job, force one refresh, and compare the served value against a direct query of the source. Use when you see this exact failure in generic churn stack and the affected record or object can be named. Not for a different generic churn stack …
Look the object up by listing the current workspace rather than trusting the stored id or name, remap the reference to the current id, and fail loudly when a listing has no match. Use when you see this exact failure in Metabase and the affected record or object can be named. Not for a different Metabase error with ano…
Look the object up by listing the current workspace rather than trusting the stored id or name, remap the reference to the current id, and fail loudly when a listing has no match. Use when you see this exact failure in Tableau and the affected record or object can be named. Not for a different Tableau error with anoth…
Fixes a Looker error saying a field was not found in a view for usage_events churn_risk_score so the CS dashboard renders again, by repairing the LookML reference. Use when one dashboard or tile errors on the field. Not for a field that never existed in the data.
Diagnoses an encrypted backup restore that fails even though the password is correct, by checking key version, encoding, algorithm, and damaged key material. Use when decryption fails on a known good password. Not for a forgotten or lost password with no key escrow.
Fixes an outstanding checks list total that changed after the period was locked so the bank rec no longer ties to last month: find the cleared, voided or edited cheque that altered the locked list, restore the locked rec integrity, and lock down prior-period cheque edits. Use for bank reconciliation continuity. Not fo…
Explains why backup verification passes while a real restore fails, and closes the gap with boot, application, and full-chain restore tests. Use when SureBackup, check, or verify jobs are green but production restores break. Not for verification jobs that already report errors.
Fixes the Xero error you cannot create a journal entry with a date before the books close date when posting a correcting entry: check lock dates, choose a posting date after the lock, or lift the lock with advisor access. Use at period correction time. Not for a user permission error on journals.
Fixes dbt seed failing to cast a CSV text column to timestamp when loading seed data. Use when dbt seed errors with cannot cast type varchar to timestamp. Not for model SQL casts on warehouse tables.
Triages the npm audit block from node-forge GHSA-86w9-cpqp-85rv (CVE-2026-85393) in Nuxt apps, where node-forge arrives through nitropack and listhen and no patched release exists. Shows proving the chain, checking whether RSA signature verification is reachable, recording a time-boxed single-advisory audit exception,…
How to fix terraform's "Backend initialization required" after migrating the state backend: re-initializing with state migration, answering the migration prompt safely in automation, and verifying the state landed intact. Use when the backend block changed and apply refuses to run. Not for provider or syntax errors.
A recovery playbook for golang-migrate's Dirty database version error: how to inspect what the failed migration partially applied, finish or undo it by hand, clear the dirty flag with migrate force, and verify the chain is clean. Use when migrate refuses to run because a version is marked dirty. Not for migrations tha…