Add migration error for candid creds

Metadata

Project: snapcraft
Number: #6414
Type: issue
State: closed
Author: mr-cal
Labels: Status: Triaged Type: Enhancement
Created: 2026-09-04 12:29 PM UTC
Updated: 2026-09-08 06:41 PM UTC
Closed: 2026-09-15 05:28 PM UTC

Current evaluation

Enhancement request to raise a friendly migration error when Candid credentials are detected was closed after a bot comment linking internal ticket SNAPCRAFT-1381; no PR or commit implemented it.

Resolution: closed stale

Reason: The only comment is the autogenerated syncronize-issues-to-j Jira notice linking SNAPCRAFT-1381, and no linked PR or commit added Candid creds detection or a SNAPAPCRAFT_STORE_AUTH=candid check in the codebase. The work was deferred to the internal Jira ticket and the GitHub issue was closed without explanation or a code change.

Evaluated by: mr-cal-bot

No scores available.

Issue body

### Check existing issues - [x] I've verified that this request isn't described by any existing issues. ### Request Snapcraft 9.1 removed Candid as a valid authentication method. However, we need to detect candid credentials and raise a user-friendly error. We can do this by checking if `SNAPCRAFT_STORE_AUTH=candid` is set and/or by parsing the creds file (candid creds are easy to classify). ### The problem it solves It gives users a clear error message, so they aren't confused when Snapcraft 9.1 stops accepting their auth.

Evaluation history

Date	Model	Scores	Action	Summary
2026-10-03 02:27 PM UTC	stealth/space-bunny-alpha	—	closed stale	Enhancement request to raise a friendly migration error when Candid credentials are detected was closed after a bot comment linking internal ticket SNAPCRAFT-1381; no PR or commit implemented it.
2026-09-25 09:56 AM UTC	stealth/space-bunny-alpha	—	closed stale	Deferred to internal Jira ticket SNAPCRAFT-1381 and closed without a corresponding PR or commit; the requested Candid credential migration error was not implemented.
2026-09-15 05:34 PM UTC	qwen/qwen3.6-35b-a3b	—	—	Closed without implementation. Deferred to internal Jira tracking (SNAPCRAFT-1381) for future Candid credential migration error handling.
2026-09-08 06:50 PM UTC	qwen/qwen3.6-35b-a3b	Impact: 55 Quick Win: 36 Staleness: 0 Complexity: 35 Confidence: 75 Support Request: 10	keep open	Enhancement to detect candid credentials in creds files and raise a user-friendly migration error, complementing existing env var checks.
2026-09-06 06:55 AM UTC	qwen3.6-35b-a3b-mtp-q6	Impact: 50 Quick Win: 35 Staleness: 5 Complexity: 30 Confidence: 80 Support Request: 10	keep open	Enhancement to detect candid credentials in creds files and raise a user-friendly migration error. Partially implemented (env var check exists), but creds file parsing is missing.

Update history

Date	Change
2026-09-15 05:28 PM UTC	closed
2026-09-08 06:41 PM UTC	updated
2026-09-04 12:29 PM UTC	created

Related work

Superseded By: warthogs.atlassian.net/browse/SNAPCRAFT-1381 (confidence 80%)
Internal Jira ticket cited in the closing comment as the place the work moved to.
Related To: snapcraft#4227 (confidence 65%)
Open issue about autodetecting Candid credentials, now obsolete since Candid auth was removed in Snapcraft 9.1.

Related issues

No related issues found above the similarity threshold.