Identity that an operational workflow can use

I contributed authorization, credential recovery and external identifier resolution in Atlas. The connected problem is that being signed in does not automatically mean a workflow has the right permission, a usable Google credential or a verified identifier for its recipient in another service.

Those are separate decisions.

The authored change adds a dedicated Taxonomy administration guard and applies it to selected administration routes. The inspected guard distinguishes a missing authenticated user from a user without the required tool permission. I describe that as enforcing a specific server-side permission contract. I do not claim the patch alone establishes a complete security audit of Atlas.

Recover credentials without losing continuity

The authored change preserves an existing Google refresh token when a later credential update does not include a replacement. The selected access-token path also handles an expired stored credential explicitly: attempt refresh when possible and return a recovery-required outcome when refresh fails or no refresh credential is available.

I would walk through the expired branch, because that is where a successful sign-in can otherwise mislead an operator about whether their source integration is usable. The inspected version trusts an access token without expiry information, so I do not claim universal token validity or scope verification.

The history then changes the user flow.

The authored change removes selected manual-link prompts and leaves compatibility redirects for deprecated linking routes. Its narrative describes automatic linking at sign-in; the inspected removal patch does not independently prove every token-persistence path. I keep that dependency visible and do not present the earlier recovery flow as the current interface at every revision.

Inspect the system diagram

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Resolve external IDs with provenance

The authored change adds email-based Teamwork and Slack identifier resolution. The service normalizes email, checks a Teamwork roster and calls a Slack lookup. Results retain resolved or unresolved states, reasons and timestamps. Stored provenance distinguishes automatic lookup from a manual override.

I can show why provenance belongs beside the value.

A recipient ID entered by hand is a different kind of evidence from an ID returned for a normalized email. The manual override requires a reason; the backfill preserves those overrides by default and supports an explicit force mode. Identifier updates can pass through the DRI projection-mutation interface, connecting identity changes with routing evidence.

The selected roster fetch requests a bounded page and does not implement a page-following loop. A comment describing a complete roster does not establish complete directory coverage. Lookup failures and missing people remain unresolved; the service cannot prove there is no matching person outside the returned page. Its provenance fields are ordinary stored metadata, not a cryptographic tamper-proof record.

Backfill reporting also separates matched identities from users whose updates were successfully saved. I would retain that distinction in any operational rollout. A successful lookup and a persisted correction are different events.

Invented onboarding walkthrough

1. Show fictional user Alex with an authenticated account and no Taxonomy administration permission. Explain the server-side decision without using real accounts.
2. Reconstruct an expired stored Google credential with a retained refresh token; then show the recovery-required branch after refresh failure.
3. Resolve Alex's invented email to a synthetic external roster entry and display the provenance fields.
4. Mark a second identifier as a manual override. Show the default backfill preserving it.
5. Omit an entry from the bounded roster. Explain why unresolved lookup does not establish complete-directory absence.
6. Reconstruct a persistence failure after a match and compare matched versus updated counts.

These are toy states. No actual credentials, user directory entries or provider requests appear in the walkthrough.

What I can claim

The selected authored patches establish defensive route guards, refresh-token preservation, flow simplification and provenance-bearing external identifier resolution. I do not claim eliminated security incidents, complete directory matching, measured onboarding speed or sole ownership of Atlas identity.

The practical contribution is connecting the identity needed for a person to sign in with the identity and evidence an operational workflow needs to act correctly.