diff --git a/20.md b/20.md
index 49e2396a..7e97dd91 100644
--- a/20.md
+++ b/20.md
@@ -82,7 +82,7 @@ Client Handling
 
 For the `pow:` prefix it may query relay metadata to get the updated difficulty requirement and try again in the background.
 
-For the `invalid:` and `blocked`: prefix the client may wish to show these as styled error popups.
+For the `invalid:` and `blocked:` prefix the client may wish to show these as styled error popups.
 
 The prefixes include a colon so that the message can be cleanly separated from the prefix by taking everything after `:` and trimming it.
 
diff --git a/46.md b/46.md
index a9f37c1b..6589fc00 100644
--- a/46.md
+++ b/46.md
@@ -61,7 +61,7 @@ These are mandatory methods the remote signer app MUST implement:
 
 - **describe**
   - params []
-  - result `{"get_public_key": { params: [], result: anything }}`  
+  - result `["describe", "get_public_key", "sign_event", "connect", "disconnect", "delegate", ...]`  
 - **get_public_key**
   - params []
   - result `pubkey` 
@@ -77,8 +77,8 @@ These are mandatory methods the remote signer app MUST implement:
 - **disconnect**
   - params []
 - **delegate** 
-  - params [`pubkey`, `conditions query string`]
-  - result `nip26 delegation token`
+  - params [`delegatee`, `{ kind: number, since: number, until: number }`]
+  - result `{ from: string, to: string, cond: string, sig: string }`
 - **get_relays**
   - params []
   - result `{ [url: string]: {read: boolean, write: boolean} }` 
diff --git a/78.md b/78.md
new file mode 100644
index 00000000..175f66b1
--- /dev/null
+++ b/78.md
@@ -0,0 +1,21 @@
+NIP-78
+======
+
+Arbitrary custom app data
+-------------------------
+
+`draft` `optional` `author:sandwich` `author:fiatjaf`
+
+The goal of this NIP is to enable [remoteStorage](https://remotestorage.io/)-like capabilities for custom applications that do not care about interoperability.
+
+Even though interoperability is great, some apps do not want or do not need interoperability, and it that wouldn't make sense for them. Yet Nostr can still serve as a generalized data storage for these apps in a "bring your own database" way, for example: a user would open an app and somehow input their preferred relay for storage, which would then enable these apps to store application-specific data there.
+
+## Nostr event
+
+This NIP specifies the use of event kind `30078` (parameterized replaceable event) with a `d` tag containing some reference to the app name and context -- or any other arbitrary string. `content` and other `tags` can be anything or in any format.
+
+## Some use cases
+
+ - User personal settings on Nostr clients (and other apps unrelated to Nostr)
+ - A way for client developers to propagate dynamic parameters to users without these having to update
+ - Personal private data generated by apps that have nothing to do with Nostr, but allow users to use Nostr relays as their personal database
diff --git a/README.md b/README.md
index da8ce96e..cce1b001 100644
--- a/README.md
+++ b/README.md
@@ -37,6 +37,7 @@ NIPs stand for **Nostr Implementation Possibilities**. They exist to document wh
 - [NIP-58: Badges](58.md)
 - [NIP-65: Relay List Metadata](65.md)
 - [NIP-69: Polls](69.md)
+- [NIP-78: Application-specific data](78.md)
 
 ## Event Kinds
 | kind          | description                      | NIP                     |
@@ -62,13 +63,14 @@ NIPs stand for **Nostr Implementation Possibilities**. They exist to document wh
 | 10002         | Relay List Metadata              | [65](65.md)             |
 | 22242         | Client Authentication            | [42](42.md)             |
 | 24133         | Nostr Connect                    | [46](46.md)             |
+| 30008         | Profile Badges                   | [58](58.md)             |
+| 30009         | Badge Definition                 | [58](58.md)             |
 | 30023         | Long-form Content                | [23](23.md)             |
+| 30078         | Application-specific Data        | [78](78.md)             |
 | 1000-9999     | Regular Events                   | [16](16.md)             |
 | 10000-19999   | Replaceable Events               | [16](16.md)             |
 | 20000-29999   | Ephemeral Events                 | [16](16.md)             |
 | 30000-39999   | Parameterized Replaceable Events | [33](33.md)             |
-| 30008         | Profile Badges                   | [58](58.md)             |
-| 30009         | Badge Definition                 | [58](58.md)             |
 
 ## Message types
 
@@ -86,7 +88,7 @@ NIPs stand for **Nostr Implementation Possibilities**. They exist to document wh
 | EVENT  | used to send events requested to clients                | [1](01.md)  |
 | NOTICE | used to send human-readable messages to clients         | [1](01.md)  |
 | EOSE   | used to notify clients all stored events have been sent | [15](15.md) |
-| OK     | used to notify clients if an EVENT was successuful      | [20](20.md) |
+| OK     | used to notify clients if an EVENT was successful       | [20](20.md) |
 | AUTH   | used to send authentication challenges                  | [42](42.md) |
 
 Please update these lists when proposing NIPs introducing new event kinds.