CI: remove nightly cron schedules, add concurrency groups, increase MIN_PROJECTS_PER_JOB to 8, fix token-swap invariant bug

- Remove schedule/cron triggers from anchor, native, pinocchio, quasar workflows
- Add concurrency groups to cancel redundant CI runs on the same branch
- Increase MIN_PROJECTS_PER_JOB from 4 to 8 to reduce matrix job count
- Fix invariant check in token-swap: pool_a * pool_a → pool_a * pool_b

Author: mikemaccana-edwardbot

.github/workflows/anchor.yml

@@ -1,8 +1,6 @@
 name: Anchor
 
 on:
-  schedule:
-    - cron: "0 0 * * *"
   push:
     branches:
       - main
@@ -11,9 +9,13 @@ on:
     branches:
       - main
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
 env:
   MAX_JOBS: 64
-  MIN_PROJECTS_PER_JOB: 4
+  MIN_PROJECTS_PER_JOB: 8
   MIN_PROJECTS_FOR_MATRIX: 4
   # See https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/
   FORCE_JAVASCRIPT_ACTIONS_TO_NODE24: true

.github/workflows/native.yml

@@ -1,8 +1,6 @@
 name: Native
 
 on:
-  schedule:
-    - cron: "0 0 * * *"
   push:
     branches:
       - main
@@ -11,9 +9,13 @@ on:
     branches:
       - main
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
 env:
   MAX_JOBS: 64
-  MIN_PROJECTS_PER_JOB: 4
+  MIN_PROJECTS_PER_JOB: 8
   MIN_PROJECTS_FOR_MATRIX: 4
   # See https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/
   FORCE_JAVASCRIPT_ACTIONS_TO_NODE24: true

.github/workflows/pinocchio.yml

@@ -1,8 +1,6 @@
 name: Pinocchio
 
 on:
-  schedule:
-    - cron: "0 0 * * *"
   push:
     branches:
       - main
@@ -11,9 +9,13 @@ on:
     branches:
       - main
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
 env:
   MAX_JOBS: 64
-  MIN_PROJECTS_PER_JOB: 4
+  MIN_PROJECTS_PER_JOB: 8
   MIN_PROJECTS_FOR_MATRIX: 4
   # See https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/
   FORCE_JAVASCRIPT_ACTIONS_TO_NODE24: true

.github/workflows/quasar.yml

@@ -1,8 +1,6 @@
 name: Quasar
 
 on:
-  schedule:
-    - cron: "0 0 * * *"
   push:
     branches:
       - main
@@ -11,9 +9,13 @@ on:
     branches:
       - main
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
 env:
   MAX_JOBS: 64
-  MIN_PROJECTS_PER_JOB: 4
+  MIN_PROJECTS_PER_JOB: 8
   MIN_PROJECTS_FOR_MATRIX: 4
   # Force all JavaScript-based actions to use Node.js 24 runtime.
   # Node.js 20 actions are deprecated and will stop working June 2026.

tokens/token-swap/anchor/programs/token-swap/src/instructions/swap_exact_tokens_for_tokens.rs

@@ -134,7 +134,7 @@ pub fn handle_swap_exact_tokens_for_tokens(
     // We tolerate if the new invariant is higher because it means a rounding error for LPs
     context.accounts.pool_account_a.reload()?;
     context.accounts.pool_account_b.reload()?;
-    if invariant > context.accounts.pool_account_a.amount * context.accounts.pool_account_a.amount {
+    if invariant > context.accounts.pool_account_a.amount * context.accounts.pool_account_b.amount {
         return err!(TutorialError::InvariantViolated);
     }