# Change history: Activities

[← Changelog](/docs/changelog). Entries: 12.

- 2026-10-01 [NEW-1001-1: Manage CRM to-dos and activity deadlines](/docs/changelog/2026-10-01#new-1001-1-manage-crm-to-dos-and-activity-deadlines)
- 2026-09-21 [NEW-0921-13: activities now support include: responsible, author, editor](/docs/changelog/2026-09-21#new-0921-13-activities-now-support-include-responsible-author-editor)
- 2026-09-13 [FIX-0913-1: the API description now names the refusals shared by every operation](/docs/changelog/2026-09-13#fix-0913-1-the-api-description-now-names-the-refusals-shared-by-every-operation)
- 2026-08-24 [BC-0824-1: activity type can no longer be changed after creation](/docs/changelog/2026-08-24#bc-0824-1-activity-type-can-no-longer-be-changed-after-creation)
- 2026-08-07 [FIX-0807-3: reading and updating a nonexistent activity answers 404, not 422](/docs/changelog/2026-08-07#fix-0807-3-reading-and-updating-a-nonexistent-activity-answers-404-not-422)
- 2026-08-07 [BC-0807-17: an activities aggregate needs a narrowing filter](/docs/changelog/2026-08-07#bc-0807-17-an-activities-aggregate-needs-a-narrowing-filter)
- 2026-08-04 [NEW-0804-18: downloading call recordings and timeline attachments](/docs/changelog/2026-08-04#new-0804-18-downloading-call-recordings-and-timeline-attachments)
- 2026-07-30 [FIX-0730-13: the spec declares create-mandatory fields on create, and stopped demanding them on update](/docs/changelog/2026-07-30#fix-0730-13-the-spec-declares-create-mandatory-fields-on-create-and-stopped-demanding-them-on-update)
- 2026-07-24 [FIX-0724-1: activities: an unrecognized filter field name is now rejected with 400 UNKNOWN_FILTER_FIELD](/docs/changelog/2026-07-24#fix-0724-1-activities-an-unrecognized-filter-field-name-is-now-rejected-with-400-unknown_filter_field)
- 2026-07-09 [NEW-0709-8: camelCase keys inside communications when creating an activity](/docs/changelog/2026-07-09#new-0709-8-camelcase-keys-inside-communications-when-creating-an-activity)
- 2026-07-09 [NEW-0709-13: GET /:entity/fields returns human-readable labels and descriptions for deals, leads, invoices, activities, statuses and timeline comments](/docs/changelog/2026-07-09#new-0709-13-get-entity-fields-returns-human-readable-labels-and-descriptions-for-deals-leads-invoices-activities-statuses-and-timeline-comments)
- 2026-06-30 [NEW-0630-10: Read AI client-call transcripts via the API](/docs/changelog/2026-06-30#new-0630-10-read-ai-client-call-transcripts-via-the-api)