Finding recently deleted feature flags

This skill produces a list of feature flags that were soft-deleted in the active project within a user-specified time window, along with who deleted each one and when.

When to use this skill

• The user asks "what flags got deleted last week / in the last N days?"
• The user wants an audit of recent flag deletions (who, when, what was removed)
• The user wants to find when a specific flag was deleted, or by whom
• Any "recently deleted feature flags" framing

Don't use this for active stale-flag cleanup — that's cleaning-up-stale-feature-flags. This skill is for flags that have already been removed.

The gotcha that makes this non-trivial

system.feature_flags exposes deleted as a boolean but does not expose deleted_at, updated_at, or last_modified_at. There's no way to filter soft-deleted flags by deletion time in a single SQL query — trying to use those columns will return Unable to resolve field.

The actual deletion timestamp lives in the per-flag activity log, reachable only via posthog:feature-flags-activity-retrieve (one call per flag id). There is no bulk activity endpoint.