Release v0.6.2-esp32: ADR-081 kernel + Timer Svc fix, 4MB CI variant

version.txt → 0.6.2.

firmware-ci.yml: matrix-build both 8MB (sdkconfig.defaults) and 4MB
(sdkconfig.defaults.4mb) variants, uploading variant-named artifacts
(esp32-csi-node.bin / esp32-csi-node-4mb.bin, partition-table.bin /
partition-table-4mb.bin). Unblocks 6-binary releases from CI alone,
no local ESP-IDF required.

CHANGELOG: promote [Unreleased] ADR-081 work into [v0.6.2-esp32],
plus Fixed entries for Timer Svc stack overflow and the
fast_loop_cb → emit_feature_state implicit-decl compile error.

Validation: 30 s run on ESP32-S3 (MAC 3c:0f:02:e9:b5:f8), 149
rv_feature_state emissions, no stack overflow, HEALTH mesh packet sent.

Co-Authored-By: claude-flow <ruv@ruv.net>

.github/workflows/firmware-ci.yml

@@ -12,31 +12,50 @@ on:
 
 jobs:
   build:
-    name: Build ESP32-S3 Firmware
+    name: Build ESP32-S3 Firmware (${{ matrix.variant }})
     runs-on: ubuntu-latest
     container:
       image: espressif/idf:v5.4
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - variant: 8mb
+            sdkconfig: sdkconfig.defaults
+            partition_table_name: partitions_display.csv
+            size_limit_kb: 1100
+            artifact_app: esp32-csi-node.bin
+            artifact_pt: partition-table.bin
+          - variant: 4mb
+            sdkconfig: sdkconfig.defaults.4mb
+            partition_table_name: partitions_4mb.csv
+            size_limit_kb: 1100
+            artifact_app: esp32-csi-node-4mb.bin
+            artifact_pt: partition-table-4mb.bin
 
     steps:
       - uses: actions/checkout@v4
 
-      - name: Build firmware
+      - name: Build firmware (${{ matrix.variant }})
         working-directory: firmware/esp32-csi-node
         run: |
           . $IDF_PATH/export.sh
+          if [ "${{ matrix.variant }}" != "8mb" ]; then
+            cp "${{ matrix.sdkconfig }}" sdkconfig.defaults
+          fi
           idf.py set-target esp32s3
           idf.py build
 
-      - name: Verify binary size (< 1100 KB gate)
+      - name: Verify binary size (< ${{ matrix.size_limit_kb }} KB gate)
         working-directory: firmware/esp32-csi-node
         run: |
           BIN=build/esp32-csi-node.bin
           SIZE=$(stat -c%s "$BIN")
-          MAX=$((1100 * 1024))
+          MAX=$((${{ matrix.size_limit_kb }} * 1024))
           echo "Binary size: $SIZE bytes ($(( SIZE / 1024 )) KB)"
-          echo "Size limit:  $MAX bytes (1100 KB — includes WASM runtime + HTTP client for Seed swarm bridge)"
+          echo "Size limit:  $MAX bytes (${{ matrix.size_limit_kb }} KB)"
           if [ "$SIZE" -gt "$MAX" ]; then
-            echo "::error::Firmware binary exceeds 1100 KB size gate ($SIZE > $MAX)"
+            echo "::error::Firmware binary exceeds ${{ matrix.size_limit_kb }} KB size gate ($SIZE > $MAX)"
             exit 1
           fi
           echo "Binary size OK: $SIZE <= $MAX"
@@ -47,14 +66,11 @@ jobs:
           ERRORS=0
           BIN=build/esp32-csi-node.bin
 
-          # Check binary exists and is non-empty.
           if [ ! -s "$BIN" ]; then
             echo "::error::Binary not found or empty"
             exit 1
           fi
 
-          # Check partition table magic (0xAA50 at offset 0).
-          # Use od instead of xxd (xxd not available in espressif/idf container).
           PT=build/partition_table/partition-table.bin
           if [ -f "$PT" ]; then
             MAGIC=$(od -A n -t x1 -N 2 "$PT" | tr -d ' ')
@@ -64,14 +80,12 @@ jobs:
             fi
           fi
 
-          # Check bootloader exists.
           BL=build/bootloader/bootloader.bin
           if [ ! -s "$BL" ]; then
             echo "::warning::Bootloader binary missing or empty"
             ERRORS=$((ERRORS + 1))
           fi
 
-          # Verify non-zero data in binary (not all 0xFF padding).
           NONZERO=$(od -A n -t x1 -N 1024 "$BIN" | tr -d ' f\n' | wc -c)
           if [ "$NONZERO" -lt 100 ]; then
             echo "::error::Binary appears to be mostly padding (non-zero chars: $NONZERO)"
@@ -84,19 +98,27 @@ jobs:
             echo "Flash image integrity verified"
           fi
 
+      - name: Stage release binaries with variant-specific names
+        working-directory: firmware/esp32-csi-node
+        run: |
+          mkdir -p release-staging
+          cp build/esp32-csi-node.bin                      release-staging/${{ matrix.artifact_app }}
+          cp build/partition_table/partition-table.bin     release-staging/${{ matrix.artifact_pt }}
+          if [ "${{ matrix.variant }}" = "8mb" ]; then
+            cp build/bootloader/bootloader.bin             release-staging/bootloader.bin
+            cp build/ota_data_initial.bin                  release-staging/ota_data_initial.bin
+          fi
+          ls -la release-staging/
+
       - name: Check QEMU ESP32-S3 support status
         run: |
           echo "::notice::ESP32-S3 QEMU support is experimental in ESP-IDF v5.4. "
           echo "Full smoke testing requires QEMU 8.2+ with xtensa-esp32s3 target."
           echo "See: https://github.com/espressif/qemu/wiki"
 
-      - name: Upload firmware artifact
+      - name: Upload firmware artifact (${{ matrix.variant }})
         uses: actions/upload-artifact@v4
         with:
-          name: esp32-csi-node-firmware
-          path: |
-            firmware/esp32-csi-node/build/esp32-csi-node.bin
-            firmware/esp32-csi-node/build/bootloader/bootloader.bin
-            firmware/esp32-csi-node/build/partition_table/partition-table.bin
-            firmware/esp32-csi-node/build/ota_data_initial.bin
+          name: esp32-csi-node-firmware-${{ matrix.variant }}
+          path: firmware/esp32-csi-node/release-staging/
           retention-days: 90