docs: notes from cdc 15

cips/README.md

@@ -20,7 +20,10 @@ Read [CIP-1](./cip-1.md) for information on the CIP process.
 | 12 |   June 5, 2024    | [Agenda](https://github.com/celestiaorg/CIPs/issues/149) |    [Tweet Thread](https://x.com/JoshCStein/status/1798381092493504830)    |    [Recording](https://www.youtube.com/watch?v=kV5_ANNhixI)     |
 | 13 |   July 3, 2024    | [Agenda](https://github.com/celestiaorg/CIPs/issues/155) |    [Tweet Thread](https://x.com/JoshCStein/status/1808531780506403102)    |    [Recording](https://youtu.be/WzPi49Ge2rA)     |
 | 14 |   July 24, 2024    | [Agenda](https://github.com/celestiaorg/CIPs/issues/163) |    [Tweet Thread](https://x.com/JoshCStein/status/1816142425011662993), [Notes](./notes/cdc-14.md)    |    [Recording](https://www.youtube.com/watch?v=bwlpAy_KE9U)     |
-| 15 |   August 7, 2024    | [Agenda](https://github.com/celestiaorg/CIPs/issues/185) |    N/A    |    N/A    |
+| 15 |   August 7, 2024    | [Agenda](https://github.com/celestiaorg/CIPs/issues/185) |    [Notes](./notes/cdc-15.md)    |    [Recording](https://www.youtube.com/watch?v=7f1Jtggld34)    |
+| 16 |   August 21, 2024    | [Agenda](https://github.com/celestiaorg/CIPs/issues/194) |    TBD    |    TBD    |
+
+
 
 ## Celestia Improvement Proposals (CIPs)
 

cips/SUMMARY.md

@@ -29,7 +29,8 @@
   - [CIP-24](./cip-24.md)
 
 - [Core Devs Call notes](./notes/README.md)
-  - [CDC 14](./notes/cdc-14.md)
+  - [CDC #14](./notes/cdc-14.md)
+  - [CDC #15](./notes/cdc-15.md)
 
 # CIP template
 

cips/notes/README.md

@@ -2,4 +2,5 @@
 
 | Call | Notes |
 | - | - |
-| 14 | [cdc-14.md](cdc-14.md) |
+| 14 | [CDC #14](cdc-14.md) |
+| 15 | [CDC #15](cdc-15.md) |

cips/notes/cdc-15.md

@@ -0,0 +1,41 @@
+# Celestia Core Devs Call 15 notes
+
+**Date**: Wednesday, August 7th  
+**Duration**: 9 minutes 45 seconds  
+
+#### Action Items
+
+#### Overview
+
+*   Celestia Core Dev's Call 15 focused on working group updates and upcoming upgrades
+*   Lemongrass hard fork ([CIP-17](../cip-17.md)) and Celestia App v2 upgrades timelines slightly pushed back:
+  * Arabica (mid-August)
+  * Mocha (end of August)
+  * Mainnet (early September)
+*   [CIP-24](../cip-24.md) introduced to simplify gas estimation for clients by making cost variables version-based instead of governance-modifiable
+
+#### Working group updates
+
+*   Interface working group: Draft CIP in progress, to be completed by **end of August**
+*   ZK working group: Started work on exploring paths leading to ZK accounts, discussion planned for next week
+*   ZK working group sync meetings now biweekly, alternating with core dev calls
+
+#### Lemongrass hard fork and Celestia App v2 upgrades
+
+*   Celestia Node to release update supporting Celestia App v2 soon
+*   Arabica devnet upgrade planned for **August 14th**
+*   Node operators must upgrade within **1 week** timeframe
+*   Consensus node operators need to use a specific CLI flag ([see documentation](https://docs.celestia.org/nodes/hardfork-process#lemongrass-hardfork))
+*   **Application owners on Arabica advised to monitor before and after upgrade**
+*   Upgrade process: Arabica first, then Mocha, finally Mainnet
+
+
+#### CIP 24: Constant gas costs for blob transactions
+
+*   [CIP-24](../cip-24.md) aims to simplify gas estimation for clients submitting transactions and blobs
+*   Changes two governance-modifiable variables to version-based constants:
+    *   `blob.GasPerBlobByte`
+    *   `auth.TxSizeCostPerByte`
+*   Allows clients to rely on consistent values for gas calculations within major versions
+*   Draft PR with reference implementation nearly ready
+*   CIP to remain in draft status until implementation is complete