Executable capability ledger

Feature coverage, without hiding the gates.

Follow implementation across every language, then separate code completeness from interoperability evidence and release readiness.

38tracked capabilities

34complete implementations

4interop evidence complete

4release-supported

Evidence snapshot

Reviewed 2026-07-26

android: a5edacccee3d
ios: 693a50ad0a0e
relay: a8e968c27d3f
nips: db5fe3de8c5d

Showing 38 of 38 capabilities

identity

identity.local

Import, public-key derivation, retained authority, redaction, and explicit erasure

rust-core

implementation · completeinterop · completerelease · supported

Rust: complete
Kotlin: complete
Android: complete
Swift: complete
TypeScript: complete

Evidence and required tests

Evidence

Android crypto identity
iOS Keypair and Keychain
NIP-01 keys

Required tests

valid and invalid key import
caller buffer ownership
redaction
idempotent erasure
use after erasure
concurrent access

identity.external-signer

Host, hardware, browser-extension, or remote signing and ECDH capabilities

shared-boundary

implementation · partialinterop · pendingrelease · gated

Rust: complete
Kotlin: partial
Android: partial
Swift: partial
TypeScript: partial

Evidence and required tests

Evidence

Android and iOS local key owners
browser external signer use cases

Required tests

sign-only capability
ECDH-only capability
cancellation
provider rejection
no private-key export

nostr

nostr.nip01.receive

Bounded signed-event parsing, exact raw tags, ID recomputation, signature verification, and canonical JSON

rust-core

implementation · completeinterop · completerelease · supported

Rust: complete
Kotlin: complete
Android: complete
Swift: complete
TypeScript: complete

Evidence and required tests

Evidence

NIP-01
Softrelay signed-event validation
shared signed-event fixture

Required tests

valid external fixture
unknown and trailing tag fields
tampered ID
tampered signature
kind and timestamp bounds
event size bound

nostr.nip01.author

Explicit event drafts and signing without hidden clocks or tag normalization

rust-core

implementation · completeinterop · completerelease · supported

Rust: complete
Kotlin: complete
Android: complete
Swift: complete
TypeScript: complete

Evidence and required tests

Evidence

NIP-01
Android signedEvent
iOS signedEvent

Required tests

explicit timestamp
exact raw tags
deterministic event ID
signature verification
oversized draft rejection
complex language example

nostr.nip19

Bech32 keys, event identifiers, profiles, and relay hints used by Softchat

rust-core

implementation · completeinterop · pendingrelease · gated

Rust: complete
Kotlin: complete
Android: complete
Swift: complete
TypeScript: complete

Evidence and required tests

Evidence

NIP-19
Android identifiers
iOS identifiers

Required tests

official vectors
round trips
mixed-case rejection
unknown TLV retention policy
resource bounds

crypto

crypto.nip44-v2

NIP-44 v2 encryption and authenticated decryption with a bounded Softchat profile

rust-core

implementation · completeinterop · completerelease · supported

Rust: complete
Kotlin: complete
Android: complete
Swift: complete
TypeScript: complete

Evidence and required tests

Evidence

NIP-44
nostr 0.44.2
nip44 0.3.0
official vector corpus
independent extended-prefix fixture
Android NIP-44
iOS NIP-44

Required tests

official valid vectors
official invalid vectors
Unicode
wrong recipient
tampering
old and extended length prefixes
product allocation limits

messaging

nostr.nip59.durable

Rumor, signed seal, one-time durable gift wrap, recipient routing, and private timestamps

rust-core

implementation · completeinterop · pendingrelease · gated

Rust: complete
Kotlin: complete
Android: complete
Swift: complete
TypeScript: complete

Evidence and required tests

Evidence

NIP-59
official NIP-59 example
Android giftWrappedEvent
iOS NostrGiftWrapEvent
Softrelay gift-wrap routing
accepted private-envelope profile

Required tests

official example
fresh wrapper key
independent past timestamps
exactly one recipient tag
empty seal tags
outer and seal signatures
rumor ID
author binding
wrong recipient
tampering

nostr.nip59.ephemeral

Ephemeral kind 21059 wrapping with non-persistent relay behavior

rust-core

implementation · completeinterop · pendingrelease · gated

Rust: complete
Kotlin: complete
Android: complete
Swift: complete
TypeScript: complete

Evidence and required tests

Evidence

NIP-59
Android typing wrappers
iOS ephemeral wrappers
Softrelay ephemeral integration test

Required tests

wrap and unwrap
kind enforcement
relay non-persistence
recipient authorization
silent-notification policy

messaging.nip17.message

Private kind 14 one-to-one and group chat text with canonical reply and sender-copy behavior

rust-core

implementation · completeinterop · pendingrelease · gated

Rust: complete
Kotlin: complete
Android: complete
Swift: complete
TypeScript: complete

Evidence and required tests

Evidence

NIP-17
official NIP-17 sender and recipient copies
Android DirectMessage.Message
iOS NostrChatMessageEvent
accepted minimum NIP-17 text profile

Required tests

one-to-one send and receive
group recipient copies
sender copy
reply tag
relay-hint handling
unknown tags
released-client interoperability

messaging.subject

Softchat group subject and optional icon profile

rust-core

implementation · completeinterop · pendingrelease · gated

Rust: complete
Kotlin: complete
Android: complete
Swift: complete
TypeScript: complete

Evidence and required tests

Evidence

Android DirectMessage.Subject
iOS chat subject and image tags
accepted Softchat event profile
released Android and iOS event-shape fixtures

Required tests

subject text
custom emoji
icon metadata
empty subject
cross-client fixture

messaging.reply-forward

Replies and Softchat forwarding/repost metadata

rust-core

implementation · completeinterop · pendingrelease · gated

Rust: complete
Kotlin: complete
Android: complete
Swift: complete
TypeScript: complete

Evidence and required tests

Evidence

Android parent and ForwardFrom tags
iOS reply and repost tags
accepted Softchat event profile
released Android and iOS event-shape fixtures

Required tests

reply
forward
relay hint
missing optional fields
unknown extension fields
cross-client tag order

messaging.generic-repost

NIP-18 kind 16 generic repost compatibility distinct from Softchat q-tag forwarding

rust-core

implementation · completeinterop · pendingrelease · gated

Rust: complete
Kotlin: complete
Android: complete
Swift: complete
TypeScript: complete

Evidence and required tests

Evidence

NIP-18
iOS NostrGenericRepostEvent
Android uses q-tag forwarding and has no kind 16 model
accepted receive-only Softchat event profile
released iOS event-shape fixture

Required tests

embedded event
e p and k references
relay hint
malformed embedded event
unknown tags
iOS fixture
Android compatibility policy

messaging.reaction

NIP-25 text and custom-emoji reactions

rust-core

implementation · completeinterop · pendingrelease · gated

Rust: complete
Kotlin: complete
Android: complete
Swift: complete
TypeScript: complete

Evidence and required tests

Evidence

NIP-25
Android Reaction
iOS NostrReactionEvent

Required tests

Unicode emoji
custom emoji tag
e p and k references
invalid parent
released-client interoperability

messaging.delete

NIP-09 deletion requests and Softchat author/recipient rules

rust-core

implementation · completeinterop · pendingrelease · gated

Rust: complete
Kotlin: complete
Android: complete
Swift: complete
TypeScript: complete

Evidence and required tests

Evidence

NIP-09
Android EventDeletionRequest
iOS NostrDeletionRequestEvent

Required tests

author deletion
unauthorized deletion
multiple references
gift-wrapped deletion
projection behavior

messaging.edit

Softchat kind 1010 updated-content profile

rust-core

implementation · completeinterop · pendingrelease · gated

Rust: complete
Kotlin: complete
Android: complete
Swift: complete
TypeScript: complete

Evidence and required tests

Evidence

Android Edit
iOS NostrUpdatedContentEvent
accepted Softchat event profile
released Android and iOS event-shape fixtures

Required tests

author-only edit
parent reference
emoji retention
attachment retention
delete interaction
latest-edit projection

messaging.typing

Softchat kind 21234 typing rumors in ephemeral gift wraps

rust-core

implementation · completeinterop · pendingrelease · gated

Rust: complete
Kotlin: complete
Android: complete
Swift: complete
TypeScript: complete

Evidence and required tests

Evidence

Android IsTyping
iOS NostrTypingEvent
Softrelay ephemeral route

Required tests

participant tags
ephemeral wrapper
no persistence
expiry at projection layer
no alert

messaging.metadata

Softchat user metadata payload and encrypted distribution policy

rust-core

implementation · completeinterop · pendingrelease · gated

Rust: complete
Kotlin: complete
Android: complete
Swift: complete
TypeScript: complete

Evidence and required tests

Evidence

NIP-01 metadata
Android UserMetadata
iOS NostrUserMetadataEvent
accepted private metadata profile
released Android event-shape fixture

Required tests

known fields
unknown fields
invalid URLs
empty metadata
encrypted recipient copies
replacement ordering

messaging.follow-list

NIP-02 kind 3 follow-list and local-name profile used for contacts

rust-core

implementation · completeinterop · pendingrelease · gated

Rust: complete
Kotlin: complete
Android: complete
Swift: complete
TypeScript: complete

Evidence and required tests

Evidence

NIP-02
iOS NostrFollowListEvent and ChatService
Android has no kind 3 event model
accepted private contact-backup profile
released iOS event-shape fixture

Required tests

p-tag public key
relay hint
local name
trailing empty fields
replaceable ordering
duplicate contacts
iOS fixture
Android product behavior

sync

messaging.app-data

NIP-78 kind 30078 application data

rust-core

implementation · completeinterop · pendingrelease · gated

Rust: complete
Kotlin: complete
Android: complete
Swift: complete
TypeScript: complete

Evidence and required tests

Evidence

NIP-78
Android ApplicationSpecificData
iOS customAppData

Required tests

d-tag identity
replacement ordering
encryption policy
unknown payload versions
cross-client fixture

messaging.app-data-sync

Softchat kind 30079 cross-device application-data synchronization

rust-core

implementation · completeinterop · pendingrelease · gated

Rust: complete
Kotlin: complete
Android: complete
Swift: complete
TypeScript: complete

Evidence and required tests

Evidence

iOS appDataSync
Softrelay app-data-sync integration test
Android has no named kind
accepted direct self-encrypted profile
released iOS and Softrelay fixtures

Required tests

device authorization
replaceable identity
conflict ordering
relay author scope
Android interoperability

sync.negentropy

NIP-77 set reconciliation and Softchat relay orchestration

rust-core

implementation · completeinterop · pendingrelease · gated

Rust: complete
Kotlin: complete
Android: complete
Swift: complete
TypeScript: complete

Evidence and required tests

Evidence

NIP-77
Android Negentropy
iOS Negentropy
softrelay-negentropy

Required tests

independent binary vectors
empty and identical sets
differences both ways
frame limit
NEG-ERR
cancellation
relay interoperability

sync.delivery

Durable outbox, per-event acknowledgement, retry, recovery, and honest delivery state

platform-adapter

implementation · platform-ownedinterop · pendingrelease · gated

Rust: complete
Kotlin: platform-owned
Android: platform-owned
Swift: platform-owned
TypeScript: platform-owned

Evidence and required tests

Evidence

Android Outbox and Room
iOS OutgoingEventQueue and GRDB

Required tests

persist before send
crash recovery
partial batch
retry classification
duplicate acknowledgement
account switch
offline restart

sync.persistence

Authoritative platform persistence adapter and bounded Rust projections

platform-adapter

implementation · platform-ownedinterop · pendingrelease · gated

Rust: complete
Kotlin: platform-owned
Android: platform-owned
Swift: platform-owned
TypeScript: platform-owned

Evidence and required tests

Evidence

Android Room stores
iOS GRDB stores

Required tests

transactional batch
idempotent ingestion
invalid-event quarantine
schema migration
account isolation
large history

wire

relay.frames

Strict client and relay messages for EVENT, REQ, CLOSE, OK, EOSE, CLOSED, NOTICE, AUTH, and COUNT

rust-core

implementation · completeinterop · pendingrelease · gated

Rust: complete
Kotlin: complete
Android: complete
Swift: complete
TypeScript: complete

Evidence and required tests

Evidence

NIP-01
NIP-42
NIP-45
Android relay messages
iOS relay messages
Softrelay codecs

Required tests

every frame shape
trailing item rejection
malformed JSON
size bounds
unknown command policy
round trips

relay.filters

NIP-01 filters with exact prefix, time, limit, and generic tag semantics

rust-core

implementation · completeinterop · pendingrelease · gated

Rust: complete
Kotlin: complete
Android: complete
Swift: complete
TypeScript: complete

Evidence and required tests

Evidence

NIP-01
Android RelayFilter
iOS filters
Softrelay filters

Required tests

ids and authors
kinds
since and until
limit
generic tags
duplicate fields
relay conformance

relay.nip42

Challenge-bound NIP-42 authentication event plans and validation

rust-core

implementation · completeinterop · pendingrelease · gated

Rust: complete
Kotlin: complete
Android: complete
Swift: complete
TypeScript: complete

Evidence and required tests

Evidence

NIP-42
Android auth flow
iOS auth flow
Softrelay mandatory auth policy

Required tests

challenge tag
relay tag
timestamp window
wrong relay
replay
accepted and rejected OK
production relay interoperability

relay.batch-events

Softchat EVENTS batch command with one acknowledgement per event

rust-core

implementation · completeinterop · pendingrelease · gated

Rust: complete
Kotlin: complete
Android: complete
Swift: complete
TypeScript: complete

Evidence and required tests

Evidence

Android EVENTS sender
iOS EVENTS sender
Softrelay EVENTS handler
accepted relay-batch profile

Required tests

empty batch
mixed accepted and rejected
duplicate IDs
out-of-order OK
partial disconnect
retry classification

relay.session

Subscription, query, publish, backpressure, reconnect, timeout, status, and cancellation state

shared-boundary

implementation · completeinterop · pendingrelease · gated

Rust: complete
Kotlin: complete
Android: complete
Swift: complete
TypeScript: complete

Evidence and required tests

Evidence

Android RelaySession
iOS actor NostrClient
Softrelay integration client

Required tests

connect and auth
subscribe and EOSE
publish and OK
close
reconnect
cancellation
bounded queues
slow consumer

noise

wire.noise

Deployed wss+noise profile, handshake, negotiation, chunking, rekeying, and bounded sessions

rust-core

implementation · completeinterop · pendingrelease · gated

Rust: complete
Kotlin: complete
Android: complete
Swift: complete
TypeScript: complete

Evidence and required tests

Evidence

Android Noise client
iOS Noise client
softrelay-noise
Softrelay interoperability tests

Required tests

independent handshake vectors
client and relay interoperability
bad key and PSK
bidirectional chunking
512 KiB bound
nonce exhaustion
rekey
shutdown

media

media.metadata

Softchat image, imeta, emoji, dimensions, hashes, and attachment-reference profile

rust-core

implementation · completeinterop · pendingrelease · gated

Rust: complete
Kotlin: complete
Android: complete
Swift: complete
TypeScript: complete

Evidence and required tests

Evidence

NIP-94
Android NostrFileMetadata
iOS media attachment types
accepted Softchat imeta profile
released Android and iOS event-shape fixtures

Required tests

image
video
audio and waveform
unknown metadata
dimensions
hashes
URLs
cross-client fixtures

media.crypto

Streaming attachment encryption, decryption, hashing, and bounded staging

rust-core

implementation · completeinterop · pendingrelease · gated

Rust: complete
Kotlin: complete
Android: complete
Swift: complete
TypeScript: complete

Evidence and required tests

Evidence

Android attachment crypto
iOS attachment crypto
Softrelay file API

Required tests

independent vectors
empty and boundary sizes
streaming chunks
tampering
wrong key
atomic destination
cancellation
memory bound

media.nip98

NIP-98 authorization event and immutable HTTP request plan

rust-core

implementation · completeinterop · pendingrelease · gated

Rust: complete
Kotlin: complete
Android: complete
Swift: complete
TypeScript: complete

Evidence and required tests

Evidence

NIP-98
Android NostrFileService
iOS NostrHTTPAuthEvent
Softrelay HTTP auth

Required tests

method and URL
payload hash
timestamp
signature
header encoding
redirect policy
server interoperability

media.http-execution

Uploads, downloads, progress, resumability, files, and background lifecycle

platform-adapter

implementation · platform-ownedinterop · pendingrelease · gated

Rust: complete
Kotlin: platform-owned
Android: platform-owned
Swift: platform-owned
TypeScript: platform-owned

Evidence and required tests

Evidence

Android Ktor Okio and WorkManager
iOS URLSession background transfer
browser fetch

Required tests

request-plan integration
background relaunch
resume
progress
cancellation
temporary-file cleanup
network policy
large file

observability

observability.redacted

Stable redacted errors, counters, state transitions, and build fingerprints

shared-boundary

implementation · completeinterop · pendingrelease · gated

Rust: complete
Kotlin: complete
Android: complete
Swift: complete
TypeScript: complete

Evidence and required tests

Evidence

current stable errors
Android logging
iOS logging
Softrelay metrics

Required tests

no secret plaintext or ciphertext
stable codes
safe byte counts
build fingerprint
unknown internal failure
symbolicated native crash

distribution

distribution.rust

Versioned Rust crate with rustdoc, provenance, changelog, and compatibility policy

distribution

implementation · completeinterop · pendingrelease · gated

Rust: complete
Kotlin: not-applicable
Android: not-applicable
Swift: not-applicable
TypeScript: not-applicable

Evidence and required tests

Evidence

Cargo crate
cargo doc

Required tests

cargo package
public API docs
minimum Rust version
dependency audit
consumer example

distribution.kotlin

Android AAR and JVM artifact with Dokka, sources, ABIs, symbols, and consumer verification

distribution

implementation · completeinterop · pendingrelease · gated

Rust: not-applicable
Kotlin: complete
Android: complete
Swift: not-applicable
TypeScript: not-applicable

Evidence and required tests

Evidence

packed JVM consumer
multi-ABI Android AAR
physical Android benchmark consumer

Required tests

external JVM consumer
Android emulator and device
arm64 and x86_64
16 KiB pages
R8 release
Dokka
source and native symbols

distribution.swift

XCFramework and Swift Package with DocC, symbols, checksums, and app-extension verification

distribution

implementation · completeinterop · pendingrelease · gated

Rust: not-applicable
Kotlin: not-applicable
Android: not-applicable
Swift: complete
TypeScript: not-applicable

Evidence and required tests

Evidence

SoftchatKit facade
packed XCFramework and SwiftPM consumer

Required tests

external SwiftPM consumer
device and simulator
main app and extensions
archive
module stability
DocC
dSYM

distribution.javascript

npm package for browser, Worker, Node ESM/CommonJS, Wasm, TypeDoc, and source maps

distribution

implementation · completeinterop · pendingrelease · gated

Rust: not-applicable
Kotlin: not-applicable
Android: not-applicable
Swift: not-applicable
TypeScript: complete

Evidence and required tests

Evidence

packed Node CommonJS/ESM, browser, and Worker consumers

Required tests

npm pack
external Node consumers
browser bundlers
Worker
CSP
single Wasm instance
TypeDoc
source maps