diff --git a/.github/workflows/desktop-e2e.yml b/.github/workflows/desktop-e2e.yml
index 2a40238b2..87ba5b45e 100644
--- a/.github/workflows/desktop-e2e.yml
+++ b/.github/workflows/desktop-e2e.yml
@@ -13,6 +13,9 @@ on:
 
 env:
   FORCE_JAVASCRIPT_ACTIONS_TO_NODE24: true
+  # Debug info is most of a target/ directory. Line tables keep file:line in
+  # panics and backtraces, and make builds and caches much smaller.
+  CARGO_PROFILE_DEV_DEBUG: line-tables-only
 
 defaults:
   run:
@@ -48,6 +51,9 @@ jobs:
       - uses: Swatinem/rust-cache@v2
         with:
           workspaces: desktop
+          # Only master saves, so patches share its caches instead of each
+          # storing their own, which pushes the repo over GitHub's 10 GB limit.
+          save-if: ${{ github.ref == 'refs/heads/master' }}
 
       - name: Cache heartwood binaries
         uses: actions/cache@v5
diff --git a/.github/workflows/desktop-lint.yml b/.github/workflows/desktop-lint.yml
index a88a917af..4933531e1 100644
--- a/.github/workflows/desktop-lint.yml
+++ b/.github/workflows/desktop-lint.yml
@@ -13,6 +13,9 @@ on:
 
 env:
   FORCE_JAVASCRIPT_ACTIONS_TO_NODE24: true
+  # Debug info is most of a target/ directory. Line tables keep file:line in
+  # panics and backtraces, and make builds and caches much smaller.
+  CARGO_PROFILE_DEV_DEBUG: line-tables-only
 
 defaults:
   run:
@@ -52,5 +55,8 @@ jobs:
       - uses: Swatinem/rust-cache@v2
         with:
           workspaces: desktop
+          # Only master saves, so patches share its caches instead of each
+          # storing their own, which pushes the repo over GitHub's 10 GB limit.
+          save-if: ${{ github.ref == 'refs/heads/master' }}
 
       - run: scripts/check-rs
diff --git a/.github/workflows/explorer-rust.yml b/.github/workflows/explorer-rust.yml
index 4c76bf479..867c5f5b7 100644
--- a/.github/workflows/explorer-rust.yml
+++ b/.github/workflows/explorer-rust.yml
@@ -13,6 +13,9 @@ on:
 
 env:
   FORCE_JAVASCRIPT_ACTIONS_TO_NODE24: true
+  # Debug info is most of a target/ directory. Line tables keep file:line in
+  # panics and backtraces, and make builds and caches much smaller.
+  CARGO_PROFILE_DEV_DEBUG: line-tables-only
 
 jobs:
   test:
@@ -24,6 +27,9 @@ jobs:
       - uses: Swatinem/rust-cache@v2
         with:
           workspaces: ". -> target"
+          # Only master saves, so patches share its caches instead of each
+          # storing their own, which pushes the repo over GitHub's 10 GB limit.
+          save-if: ${{ github.ref == 'refs/heads/master' }}
       - name: Build (all features)
         run: cargo build --workspace --all-features
         env:
@@ -44,6 +50,9 @@ jobs:
       - uses: Swatinem/rust-cache@v2
         with:
           workspaces: ". -> target"
+          # Only master saves, so patches share its caches instead of each
+          # storing their own, which pushes the repo over GitHub's 10 GB limit.
+          save-if: ${{ github.ref == 'refs/heads/master' }}
       - name: Run clippy
         run: cargo clippy --workspace --all-features --tests
         env: