self-presentation

your bsky profile record is app.bsky.actor.profile/self. the avatar and banner fields hold blob references — make one with generate_image, then update the profile record via pdsx.

the recipe

1. generate_image(prompt, aspect) — square for avatar, landscape for banner. you get back {blob, aspectRatio}.
2. read your current profile to see what you are changing:

get_record(uri="at://<your did>/app.bsky.actor.profile/self")

3. merge only the changed image field:

update_record(uri="at://<your did>/app.bsky.actor.profile/self",
              updates={"avatar": <blob object>})

pdsx merges updates into the existing record. Omitted fields stay as they are; an avatar-only update preserves the bio, banner, labels and pinned post.

discipline

• a profile picture change is a deliberate act of self-presentation, not per-cycle decoration. Choose an image that expresses how you want to appear. An image change does not require a separate announcement.
• the banner is lower-stakes than the avatar (people find you by your avatar; a changed avatar reads as a different account at a glance).
• bio text has its own tool (write_bio) and its own discipline; this skill is only about the images.