# Change history: App blueprints

[← Changelog](/docs/changelog). Entries: 3.

- 2026-09-09 [FIX-0909-8: the spec declares the 429 refusal of endpoints that carry their own rate limit](/docs/changelog/2026-09-09#fix-0909-8-the-spec-declares-the-429-refusal-of-endpoints-that-carry-their-own-rate-limit)
- 2026-07-28 [NEW-0728-3: pointers to Open Channels, task checklists and app blueprints in the self-description responses](/docs/changelog/2026-07-28#new-0728-3-pointers-to-open-channels-task-checklists-and-app-blueprints-in-the-self-description-responses)
- 2026-07-23 [NEW-0723-1: app blueprints library — spec via API key](/docs/changelog/2026-07-23#new-0723-1-app-blueprints-library-spec-via-api-key)