Nostr Thread Rendering (skill)

Threads#

A thread is one root of any kind plus responses that point at that root or at a descendant already in the thread.

Term	Meaning
OP	An original post of any kind with no thread tags.
Reply	Kind 1 with NIP-10 thread tags. Only valid onto a kind 1 parent.
Response	Any event that references something higher in the thread (1111, replies, 1244, quotes, highlights, …).

Publish#

Parent	Default text response	Also offer a reply (kind 1)?
Kind 1 reply	Kind 1 (another reply)	--
Kind 1 original	Kind 1111	Yes
Any other kind	Kind 1111	No

Tag shapes#

NIP-22 uppercase (E / A / P) uses the same field order as lowercase (e / a / p). Replies use the NIP-10 e row, not NIP-01.

Tag	When	Fields
e / E	NIP-01 and NIP-22	id, relay (optional), author pubkey (optional)
e	Reply (NIP-10)	id, relay, marker (root | reply), author pubkey
p / P	Mentions / NIP-22 authors	pubkey, relay (optional)
a / A	Addressable (30000–39999)	kind:pubkey:d-tag, relay (optional)
a / A	Replaceable (0, 3, 10000–19999)	kind:pubkey: (keep the trailing colon), relay (optional)

Hex ids and pubkeys are 32-byte lowercase.

Kind 1111 (NIP-22 comment = a response, not a reply)#

Role	Pointer	Kind (required)	Author if tagging a Nostr event
Root	A / E / I	K	P
Parent	a / e / i	k	p

Omit P / p on I/i-only scopes (URL, hashtag, geohash, podcast, …).

Target	Root	Parent
Regular event	E	e (same id if top-level)
Addressable / replaceable	A only (no required root E)	a and e (this version's id)
NIP-73 scope	I	Top-level: i = I. Nested: keep I; parent is e on the 1111

Nested 1111 responses copy the uppercase root; lowercase tags point at the parent response (e, k = that event's kind).

Kind 1 replies (NIP-10)#

Responding to	e tags
The kind 1 OP	One e with marker root
A nested reply	root, then marker reply (the parent reply)

Copy the parent's p tags and add the author of the parent.

Prefer marked e tags. Still render deprecated positional threads (first e = root, last = parent).

Display#

Surface	What
Main thread rows	Replies and kind 1111 responses, on every OP kind
On those rows (not extra rows)	Zap counts (BTC and/or XMR), reactions as badges or counts, boost badges, highlights
Below the fold / subsection	Other responses: kind 1244, kind 1 quotes, bookmarks, … Unknown kind → generic card

Nest on the parent: NIP-22 lowercase e / a / i; for replies, the NIP-10 reply marker when both root and reply exist. If lowercase parent tags are present, ignore uppercase E / A / I as the parent. Missing parent → still show the row at top-level.

Fetch without restricting kinds: e E a A q, plus I/i for NIP-73 scopes.

Comments / responses filter: kind 1111 comments and legacy kind 1 replies.

I / i value	Card
http(s) URL	OpenGraph, or a fallback card
Geohash, hashtag, podcast, …	An appropriate non-OG card