tweak

.github/workflows/ci.yml

@@ -548,7 +548,7 @@ jobs:
         with:
           path: ~/.platformio
           key: platformio-memory-${{ fromJSON(needs.determine-jobs.outputs.memory_impact).platform }}-${{ hashFiles('platformio.ini') }}
-      - name: Build and compile with test_build_components
+      - name: Build, compile, and analyze memory
         id: extract
         run: |
           . venv/bin/activate
@@ -563,38 +563,32 @@ jobs:
           component_list=$(echo "$components" | jq -r 'join(",")')
 
           echo "Compiling with test_build_components.py..."
+
+          # Find most recent build directory for detailed analysis
+          build_dir=$(find ~/.esphome/build -type d -maxdepth 1 -mindepth 1 -printf '%T@ %p\n' 2>/dev/null | sort -rn | head -1 | cut -d' ' -f2- || echo "")
+
+          # Run build and extract memory, with optional detailed analysis
+          if [ -n "$build_dir" ]; then
+            python script/test_build_components.py \
+              -e compile \
+              -c "$component_list" \
+              -t "$platform" 2>&1 | \
+              python script/ci_memory_impact_extract.py \
+                --output-env \
+                --build-dir "$build_dir" \
+                --output-json memory-analysis-target.json
+          else
             python script/test_build_components.py \
               -e compile \
               -c "$component_list" \
               -t "$platform" 2>&1 | \
               python script/ci_memory_impact_extract.py --output-env
-      - name: Find and upload final ELF file
-        run: |
-          # Note: test_build_components.py may run multiple builds, but each overwrites
-          # the previous firmware.elf. The memory totals (RAM/Flash) are already summed
-          # by ci_memory_impact_extract.py. This ELF is from the last build and is used
-          # for detailed component breakdown (if available).
-          mkdir -p ./elf-artifacts/target
-
-          # Find the most recent firmware.elf
-          if [ -d ~/.esphome/build ]; then
-            elf_file=$(find ~/.esphome/build -name "firmware.elf" -type f -printf '%T@ %p\n' | sort -rn | head -1 | cut -d' ' -f2-)
-
-            if [ -n "$elf_file" ] && [ -f "$elf_file" ]; then
-              echo "Found final ELF file: $elf_file"
-              cp "$elf_file" "./elf-artifacts/target/firmware.elf"
-            else
-              echo "Warning: No ELF file found in ~/.esphome/build"
-              ls -la ~/.esphome/build/ || true
           fi
-          else
+      - name: Upload memory analysis JSON
-            echo "Warning: ~/.esphome/build directory not found"
-          fi
-      - name: Upload ELF artifact
         uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02 # v4.6.2
         with:
-          name: memory-impact-target-elf
+          name: memory-analysis-target
-          path: ./elf-artifacts/target/firmware.elf
+          path: memory-analysis-target.json
           if-no-files-found: warn
           retention-days: 1
 
@@ -621,7 +615,7 @@ jobs:
         with:
           path: ~/.platformio
           key: platformio-memory-${{ fromJSON(needs.determine-jobs.outputs.memory_impact).platform }}-${{ hashFiles('platformio.ini') }}
-      - name: Build and compile with test_build_components
+      - name: Build, compile, and analyze memory
         id: extract
         run: |
           . venv/bin/activate
@@ -636,38 +630,32 @@ jobs:
           component_list=$(echo "$components" | jq -r 'join(",")')
 
           echo "Compiling with test_build_components.py..."
+
+          # Find most recent build directory for detailed analysis
+          build_dir=$(find ~/.esphome/build -type d -maxdepth 1 -mindepth 1 -printf '%T@ %p\n' 2>/dev/null | sort -rn | head -1 | cut -d' ' -f2- || echo "")
+
+          # Run build and extract memory, with optional detailed analysis
+          if [ -n "$build_dir" ]; then
+            python script/test_build_components.py \
+              -e compile \
+              -c "$component_list" \
+              -t "$platform" 2>&1 | \
+              python script/ci_memory_impact_extract.py \
+                --output-env \
+                --build-dir "$build_dir" \
+                --output-json memory-analysis-pr.json
+          else
             python script/test_build_components.py \
               -e compile \
               -c "$component_list" \
               -t "$platform" 2>&1 | \
               python script/ci_memory_impact_extract.py --output-env
-      - name: Find and upload final ELF file
-        run: |
-          # Note: test_build_components.py may run multiple builds, but each overwrites
-          # the previous firmware.elf. The memory totals (RAM/Flash) are already summed
-          # by ci_memory_impact_extract.py. This ELF is from the last build and is used
-          # for detailed component breakdown (if available).
-          mkdir -p ./elf-artifacts/pr
-
-          # Find the most recent firmware.elf
-          if [ -d ~/.esphome/build ]; then
-            elf_file=$(find ~/.esphome/build -name "firmware.elf" -type f -printf '%T@ %p\n' | sort -rn | head -1 | cut -d' ' -f2-)
-
-            if [ -n "$elf_file" ] && [ -f "$elf_file" ]; then
-              echo "Found final ELF file: $elf_file"
-              cp "$elf_file" "./elf-artifacts/pr/firmware.elf"
-            else
-              echo "Warning: No ELF file found in ~/.esphome/build"
-              ls -la ~/.esphome/build/ || true
           fi
-          else
+      - name: Upload memory analysis JSON
-            echo "Warning: ~/.esphome/build directory not found"
-          fi
-      - name: Upload ELF artifact
         uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02 # v4.6.2
         with:
-          name: memory-impact-pr-elf
+          name: memory-analysis-pr
-          path: ./elf-artifacts/pr/firmware.elf
+          path: memory-analysis-pr.json
           if-no-files-found: warn
           retention-days: 1
 
@@ -691,17 +679,17 @@ jobs:
         with:
           python-version: ${{ env.DEFAULT_PYTHON }}
           cache-key: ${{ needs.common.outputs.cache-key }}
-      - name: Download target ELF artifact
+      - name: Download target analysis JSON
         uses: actions/download-artifact@d3f86a106a0bac45b974a628896c90dbdf5c8093 # v4.3.0
         with:
-          name: memory-impact-target-elf
+          name: memory-analysis-target
-          path: ./elf-artifacts/target
+          path: ./memory-analysis
         continue-on-error: true
-      - name: Download PR ELF artifact
+      - name: Download PR analysis JSON
         uses: actions/download-artifact@d3f86a106a0bac45b974a628896c90dbdf5c8093 # v4.3.0
         with:
-          name: memory-impact-pr-elf
+          name: memory-analysis-pr
-          path: ./elf-artifacts/pr
+          path: ./memory-analysis
         continue-on-error: true
       - name: Post or update PR comment
         env:
@@ -715,22 +703,22 @@ jobs:
         run: |
           . venv/bin/activate
 
-          # Check if ELF files exist (from final build)
+          # Check if analysis JSON files exist
-          target_elf_arg=""
+          target_json_arg=""
-          pr_elf_arg=""
+          pr_json_arg=""
 
-          if [ -f ./elf-artifacts/target/firmware.elf ]; then
+          if [ -f ./memory-analysis/memory-analysis-target.json ]; then
-            echo "Found target ELF file"
+            echo "Found target analysis JSON"
-            target_elf_arg="--target-elf ./elf-artifacts/target/firmware.elf"
+            target_json_arg="--target-json ./memory-analysis/memory-analysis-target.json"
           else
-            echo "No target ELF file found"
+            echo "No target analysis JSON found"
           fi
 
-          if [ -f ./elf-artifacts/pr/firmware.elf ]; then
+          if [ -f ./memory-analysis/memory-analysis-pr.json ]; then
-            echo "Found PR ELF file"
+            echo "Found PR analysis JSON"
-            pr_elf_arg="--pr-elf ./elf-artifacts/pr/firmware.elf"
+            pr_json_arg="--pr-json ./memory-analysis/memory-analysis-pr.json"
           else
-            echo "No PR ELF file found"
+            echo "No PR analysis JSON found"
           fi
 
           python script/ci_memory_impact_comment.py \
@@ -741,8 +729,8 @@ jobs:
             --target-flash "$TARGET_FLASH" \
             --pr-ram "$PR_RAM" \
             --pr-flash "$PR_FLASH" \
-            $target_elf_arg \
+            $target_json_arg \
-            $pr_elf_arg
+            $pr_json_arg
 
   ci-status:
     name: CI Status

esphome/analyze_memory/__init__.py

@@ -7,6 +7,7 @@ import logging
 from pathlib import Path
 import re
 import subprocess
+from typing import TYPE_CHECKING
 
 from .const import (
     CORE_SUBCATEGORY_PATTERNS,
@@ -22,9 +23,65 @@ from .helpers import (
     parse_symbol_line,
 )
 
+if TYPE_CHECKING:
+    from esphome.platformio_api import IDEData
+
 _LOGGER = logging.getLogger(__name__)
 
 
+def get_toolchain_for_platform(platform: str) -> tuple[str | None, str | None]:
+    """Get objdump and readelf paths for a given platform.
+
+    This function auto-detects the correct toolchain based on the platform name,
+    using the same detection logic as PlatformIO's IDEData class.
+
+    Args:
+        platform: Platform name (e.g., "esp8266-ard", "esp32-idf", "esp32-c3-idf")
+
+    Returns:
+        Tuple of (objdump_path, readelf_path) or (None, None) if not found/supported
+    """
+    home = Path.home()
+    platformio_packages = home / ".platformio" / "packages"
+
+    # Map platform to toolchain and prefix (same logic as PlatformIO uses)
+    toolchain = None
+    prefix = None
+
+    if "esp8266" in platform:
+        toolchain = "toolchain-xtensa"
+        prefix = "xtensa-lx106-elf"
+    elif "esp32-c" in platform or "esp32-h" in platform or "esp32-p4" in platform:
+        # RISC-V variants (C2, C3, C5, C6, H2, P4)
+        toolchain = "toolchain-riscv32-esp"
+        prefix = "riscv32-esp-elf"
+    elif "esp32" in platform:
+        # Xtensa variants (original, S2, S3)
+        toolchain = "toolchain-xtensa-esp-elf"
+        if "s2" in platform:
+            prefix = "xtensa-esp32s2-elf"
+        elif "s3" in platform:
+            prefix = "xtensa-esp32s3-elf"
+        else:
+            prefix = "xtensa-esp32-elf"
+    else:
+        # Other platforms (RP2040, LibreTiny, etc.) - not supported for ELF analysis
+        _LOGGER.debug("Platform %s not supported for ELF analysis", platform)
+        return None, None
+
+    # Construct paths (same pattern as IDEData.objdump_path/readelf_path)
+    toolchain_path = platformio_packages / toolchain / "bin"
+    objdump_path = toolchain_path / f"{prefix}-objdump"
+    readelf_path = toolchain_path / f"{prefix}-readelf"
+
+    if objdump_path.exists() and readelf_path.exists():
+        _LOGGER.debug("Found %s toolchain: %s", platform, prefix)
+        return str(objdump_path), str(readelf_path)
+
+    _LOGGER.warning("Toolchain not found at %s", toolchain_path)
+    return None, None
+
+
 @dataclass
 class MemorySection:
     """Represents a memory section with its symbols."""
@@ -67,11 +124,27 @@ class MemoryAnalyzer:
         objdump_path: str | None = None,
         readelf_path: str | None = None,
         external_components: set[str] | None = None,
+        idedata: "IDEData | None" = None,
     ):
+        """Initialize memory analyzer.
+
+        Args:
+            elf_path: Path to ELF file to analyze
+            objdump_path: Path to objdump binary (auto-detected from idedata if not provided)
+            readelf_path: Path to readelf binary (auto-detected from idedata if not provided)
+            external_components: Set of external component names
+            idedata: Optional PlatformIO IDEData object to auto-detect toolchain paths
+        """
         self.elf_path = Path(elf_path)
         if not self.elf_path.exists():
             raise FileNotFoundError(f"ELF file not found: {elf_path}")
 
+        # Auto-detect toolchain paths from idedata if not provided
+        if idedata is not None and (objdump_path is None or readelf_path is None):
+            objdump_path = objdump_path or idedata.objdump_path
+            readelf_path = readelf_path or idedata.readelf_path
+            _LOGGER.debug("Using toolchain paths from PlatformIO idedata")
+
         self.objdump_path = objdump_path or "objdump"
         self.readelf_path = readelf_path or "readelf"
         self.external_components = external_components or set()

esphome/analyze_memory/cli.py

@@ -1,7 +1,6 @@
 """CLI interface for memory analysis with report generation."""
 
 from collections import defaultdict
-import subprocess
 import sys
 
 from . import MemoryAnalyzer
@@ -313,51 +312,91 @@ def analyze_elf(
 def main():
     """CLI entrypoint for memory analysis."""
     if len(sys.argv) < 2:
-        print(
+        print("Usage: python -m esphome.analyze_memory <build_directory>")
-            "Usage: python -m esphome.analyze_memory <elf_file> [objdump_path] [readelf_path]"
+        print("\nAnalyze memory usage from an ESPHome build directory.")
-        )
+        print("The build directory should contain firmware.elf and idedata will be")
-        print("\nIf objdump/readelf paths are not provided, you must specify them.")
+        print("loaded from ~/.esphome/.internal/idedata/<device>.json")
-        print("\nExample for ESP8266:")
+        print("\nExamples:")
-        print("  python -m esphome.analyze_memory firmware.elf \\")
+        print("  python -m esphome.analyze_memory ~/.esphome/build/my-device")
-        print(
+        print("  python -m esphome.analyze_memory .esphome/build/my-device")
-            "    ~/.platformio/packages/toolchain-xtensa/bin/xtensa-lx106-elf-objdump \\"
+        print("  python -m esphome.analyze_memory my-device  # Short form")
-        )
-        print(
-            "    ~/.platformio/packages/toolchain-xtensa/bin/xtensa-lx106-elf-readelf"
-        )
-        print("\nExample for ESP32:")
-        print("  python -m esphome.analyze_memory firmware.elf \\")
-        print(
-            "    ~/.platformio/packages/toolchain-xtensa-esp-elf/bin/xtensa-esp32-elf-objdump \\"
-        )
-        print(
-            "    ~/.platformio/packages/toolchain-xtensa-esp-elf/bin/xtensa-esp32-elf-readelf"
-        )
-        print("\nExample for ESP32-C3 (RISC-V):")
-        print("  python -m esphome.analyze_memory firmware.elf \\")
-        print(
-            "    ~/.platformio/packages/toolchain-riscv32-esp/bin/riscv32-esp-elf-objdump \\"
-        )
-        print(
-            "    ~/.platformio/packages/toolchain-riscv32-esp/bin/riscv32-esp-elf-readelf"
-        )
         sys.exit(1)
 
-    elf_file = sys.argv[1]
+    build_dir = sys.argv[1]
-    objdump_path = sys.argv[2] if len(sys.argv) > 2 else None
-    readelf_path = sys.argv[3] if len(sys.argv) > 3 else None
 
+    # Load build directory
+    import json
+    from pathlib import Path
+
+    from esphome.platformio_api import IDEData
+
+    build_path = Path(build_dir)
+
+    # If no path separator in name, assume it's a device name
+    if "/" not in build_dir and not build_path.is_dir():
+        # Try current directory first
+        cwd_path = Path.cwd() / ".esphome" / "build" / build_dir
+        if cwd_path.is_dir():
+            build_path = cwd_path
+            print(f"Using build directory: {build_path}", file=sys.stderr)
+        else:
+            # Fall back to home directory
+            build_path = Path.home() / ".esphome" / "build" / build_dir
+            print(f"Using build directory: {build_path}", file=sys.stderr)
+
+    if not build_path.is_dir():
+        print(f"Error: {build_path} is not a directory", file=sys.stderr)
+        sys.exit(1)
+
+    # Find firmware.elf
+    elf_file = None
+    for elf_candidate in [
+        build_path / "firmware.elf",
+        build_path / ".pioenvs" / build_path.name / "firmware.elf",
+    ]:
+        if elf_candidate.exists():
+            elf_file = str(elf_candidate)
+            break
+
+    if not elf_file:
+        print(f"Error: firmware.elf not found in {build_dir}", file=sys.stderr)
+        sys.exit(1)
+
+    # Find idedata.json - check current directory first, then home
+    device_name = build_path.name
+    idedata_candidates = [
+        Path.cwd() / ".esphome" / "idedata" / f"{device_name}.json",
+        Path.home() / ".esphome" / "idedata" / f"{device_name}.json",
+    ]
+
+    idedata = None
+    for idedata_path in idedata_candidates:
+        if idedata_path.exists():
             try:
-        report = analyze_elf(elf_file, objdump_path, readelf_path)
+                with open(idedata_path, encoding="utf-8") as f:
-        print(report)
+                    raw_data = json.load(f)
-    except (subprocess.CalledProcessError, FileNotFoundError, OSError) as e:
+                idedata = IDEData(raw_data)
-        print(f"Error: {e}", file=sys.stderr)
+                print(f"Loaded idedata from: {idedata_path}", file=sys.stderr)
-        if "readelf" in str(e) or "objdump" in str(e):
+                break
+            except (json.JSONDecodeError, OSError) as e:
+                print(f"Warning: Failed to load idedata: {e}", file=sys.stderr)
+
+    if not idedata:
         print(
-                "\nHint: You need to specify the toolchain-specific tools.",
+            f"Warning: idedata not found (searched {idedata_candidates[0]} and {idedata_candidates[1]})",
             file=sys.stderr,
         )
-            print("See usage above for examples.", file=sys.stderr)
+
+    try:
+        analyzer = MemoryAnalyzerCLI(elf_file, idedata=idedata)
+        analyzer.analyze()
+        report = analyzer.generate_report()
+        print(report)
+    except Exception as e:
+        print(f"Error: {e}", file=sys.stderr)
+        import traceback
+
+        traceback.print_exc(file=sys.stderr)
         sys.exit(1)
 
 

esphome/platformio_api.py

@@ -412,10 +412,8 @@ def analyze_memory_usage(config: dict[str, Any]) -> None:
 
     idedata = get_idedata(config)
 
-    # Get paths to tools
+    # Get ELF path
     elf_path = idedata.firmware_elf_path
-    objdump_path = idedata.objdump_path
-    readelf_path = idedata.readelf_path
 
     # Debug logging
     _LOGGER.debug("ELF path from idedata: %s", elf_path)
@@ -457,7 +455,10 @@ def analyze_memory_usage(config: dict[str, Any]) -> None:
     _LOGGER.debug("Detected external components: %s", external_components)
 
     # Create analyzer and run analysis
-    analyzer = MemoryAnalyzer(elf_path, objdump_path, readelf_path, external_components)
+    # Pass idedata to auto-detect toolchain paths
+    analyzer = MemoryAnalyzer(
+        elf_path, external_components=external_components, idedata=idedata
+    )
     analyzer.analyze()
 
     # Generate and print report

script/ci_memory_impact_comment.py

@@ -18,61 +18,31 @@ import sys
 sys.path.insert(0, str(Path(__file__).parent.parent))
 
 # pylint: disable=wrong-import-position
-from esphome.analyze_memory import MemoryAnalyzer  # noqa: E402
 
 # Comment marker to identify our memory impact comments
 COMMENT_MARKER = "<!-- esphome-memory-impact-analysis -->"
 
 
-def get_platform_toolchain(platform: str) -> tuple[str | None, str | None]:
+def load_analysis_json(json_path: str) -> dict | None:
-    """Get platform-specific objdump and readelf paths.
+    """Load memory analysis results from JSON file.
 
     Args:
-        platform: Platform name (e.g., "esp8266-ard", "esp32-idf", "esp32-c3-idf")
+        json_path: Path to analysis JSON file
 
     Returns:
-        Tuple of (objdump_path, readelf_path) or (None, None) if not found/supported
+        Dictionary with analysis results or None if file doesn't exist/can't be loaded
     """
-    from pathlib import Path
+    json_file = Path(json_path)
+    if not json_file.exists():
+        print(f"Analysis JSON not found: {json_path}", file=sys.stderr)
+        return None
 
-    home = Path.home()
+    try:
-    platformio_packages = home / ".platformio" / "packages"
+        with open(json_file, encoding="utf-8") as f:
-
+            return json.load(f)
-    # Map platform to toolchain
+    except (json.JSONDecodeError, OSError) as e:
-    toolchain = None
+        print(f"Failed to load analysis JSON: {e}", file=sys.stderr)
-    prefix = None
+        return None
-
-    if "esp8266" in platform:
-        toolchain = "toolchain-xtensa"
-        prefix = "xtensa-lx106-elf"
-    elif "esp32-c" in platform or "esp32-h" in platform or "esp32-p4" in platform:
-        # RISC-V variants (C2, C3, C5, C6, H2, P4)
-        toolchain = "toolchain-riscv32-esp"
-        prefix = "riscv32-esp-elf"
-    elif "esp32" in platform:
-        # Xtensa variants (original, S2, S3)
-        toolchain = "toolchain-xtensa-esp-elf"
-        if "s2" in platform:
-            prefix = "xtensa-esp32s2-elf"
-        elif "s3" in platform:
-            prefix = "xtensa-esp32s3-elf"
-        else:
-            prefix = "xtensa-esp32-elf"
-    else:
-        # Other platforms (RP2040, LibreTiny, etc.) - not supported
-        print(f"Platform {platform} not supported for ELF analysis", file=sys.stderr)
-        return None, None
-
-    toolchain_path = platformio_packages / toolchain / "bin"
-    objdump_path = toolchain_path / f"{prefix}-objdump"
-    readelf_path = toolchain_path / f"{prefix}-readelf"
-
-    if objdump_path.exists() and readelf_path.exists():
-        print(f"Using {platform} toolchain: {prefix}", file=sys.stderr)
-        return str(objdump_path), str(readelf_path)
-
-    print(f"Warning: Toolchain not found at {toolchain_path}", file=sys.stderr)
-    return None, None
 
 
 def format_bytes(bytes_value: int) -> str:
@@ -122,56 +92,6 @@ def format_change(before: int, after: int) -> str:
     return f"{emoji} {delta_str} ({pct_str})"
 
 
-def run_detailed_analysis(
-    elf_path: str, objdump_path: str | None = None, readelf_path: str | None = None
-) -> tuple[dict | None, dict | None]:
-    """Run detailed memory analysis on an ELF file.
-
-    Args:
-        elf_path: Path to ELF file
-        objdump_path: Optional path to objdump tool
-        readelf_path: Optional path to readelf tool
-
-    Returns:
-        Tuple of (component_breakdown, symbol_map) or (None, None) if analysis fails
-        component_breakdown: Dictionary with component memory breakdown
-        symbol_map: Dictionary mapping symbol names to their sizes
-    """
-    try:
-        analyzer = MemoryAnalyzer(elf_path, objdump_path, readelf_path)
-        components = analyzer.analyze()
-
-        # Convert ComponentMemory objects to dictionaries
-        component_result = {}
-        for name, mem in components.items():
-            component_result[name] = {
-                "text": mem.text_size,
-                "rodata": mem.rodata_size,
-                "data": mem.data_size,
-                "bss": mem.bss_size,
-                "flash_total": mem.flash_total,
-                "ram_total": mem.ram_total,
-                "symbol_count": mem.symbol_count,
-            }
-
-        # Build symbol map from all sections
-        symbol_map = {}
-        for section in analyzer.sections.values():
-            for symbol_name, size, _ in section.symbols:
-                if size > 0:  # Only track non-zero sized symbols
-                    # Demangle the symbol for better readability
-                    demangled = analyzer._demangle_symbol(symbol_name)
-                    symbol_map[demangled] = size
-
-        return component_result, symbol_map
-    except Exception as e:
-        print(f"Warning: Failed to run detailed analysis: {e}", file=sys.stderr)
-        import traceback
-
-        traceback.print_exc(file=sys.stderr)
-        return None, None
-
-
 def create_symbol_changes_table(
     target_symbols: dict | None, pr_symbols: dict | None
 ) -> str:
@@ -371,10 +291,10 @@ def create_comment_body(
     target_flash: int,
     pr_ram: int,
     pr_flash: int,
-    target_elf: str | None = None,
+    target_analysis: dict | None = None,
-    pr_elf: str | None = None,
+    pr_analysis: dict | None = None,
-    objdump_path: str | None = None,
+    target_symbols: dict | None = None,
-    readelf_path: str | None = None,
+    pr_symbols: dict | None = None,
 ) -> str:
     """Create the comment body with memory impact analysis.
 
@@ -385,10 +305,10 @@ def create_comment_body(
         target_flash: Flash usage in target branch
         pr_ram: RAM usage in PR branch
         pr_flash: Flash usage in PR branch
-        target_elf: Optional path to target branch ELF file
+        target_analysis: Optional component breakdown for target branch
-        pr_elf: Optional path to PR branch ELF file
+        pr_analysis: Optional component breakdown for PR branch
-        objdump_path: Optional path to objdump tool
+        target_symbols: Optional symbol map for target branch
-        readelf_path: Optional path to readelf tool
+        pr_symbols: Optional symbol map for PR branch
 
     Returns:
         Formatted comment body
@@ -396,25 +316,10 @@ def create_comment_body(
     ram_change = format_change(target_ram, pr_ram)
     flash_change = format_change(target_flash, pr_flash)
 
-    # Run detailed analysis if ELF files are provided
+    # Use provided analysis data if available
-    target_analysis = None
-    pr_analysis = None
-    target_symbols = None
-    pr_symbols = None
     component_breakdown = ""
     symbol_changes = ""
 
-    if target_elf and pr_elf:
-        print(
-            f"Running detailed analysis on {target_elf} and {pr_elf}", file=sys.stderr
-        )
-        target_analysis, target_symbols = run_detailed_analysis(
-            target_elf, objdump_path, readelf_path
-        )
-        pr_analysis, pr_symbols = run_detailed_analysis(
-            pr_elf, objdump_path, readelf_path
-        )
-
     if target_analysis and pr_analysis:
         component_breakdown = create_detailed_breakdown_table(
             target_analysis, pr_analysis
@@ -612,13 +517,13 @@ def main() -> int:
     parser.add_argument(
         "--pr-flash", type=int, required=True, help="PR branch flash usage"
     )
-    parser.add_argument("--target-elf", help="Optional path to target branch ELF file")
-    parser.add_argument("--pr-elf", help="Optional path to PR branch ELF file")
     parser.add_argument(
-        "--objdump-path", help="Optional path to objdump tool for detailed analysis"
+        "--target-json",
+        help="Optional path to target branch analysis JSON (for detailed analysis)",
     )
     parser.add_argument(
-        "--readelf-path", help="Optional path to readelf tool for detailed analysis"
+        "--pr-json",
+        help="Optional path to PR branch analysis JSON (for detailed analysis)",
     )
 
     args = parser.parse_args()
@@ -633,17 +538,26 @@ def main() -> int:
         print(f"Error parsing --components JSON: {e}", file=sys.stderr)
         sys.exit(1)
 
-    # Detect platform-specific toolchain paths
+    # Load analysis JSON files
-    objdump_path = args.objdump_path
+    target_analysis = None
-    readelf_path = args.readelf_path
+    pr_analysis = None
+    target_symbols = None
+    pr_symbols = None
 
-    if not objdump_path or not readelf_path:
+    if args.target_json:
-        # Auto-detect based on platform
+        target_data = load_analysis_json(args.target_json)
-        objdump_path, readelf_path = get_platform_toolchain(args.platform)
+        if target_data and target_data.get("detailed_analysis"):
+            target_analysis = target_data["detailed_analysis"].get("components")
+            target_symbols = target_data["detailed_analysis"].get("symbols")
+
+    if args.pr_json:
+        pr_data = load_analysis_json(args.pr_json)
+        if pr_data and pr_data.get("detailed_analysis"):
+            pr_analysis = pr_data["detailed_analysis"].get("components")
+            pr_symbols = pr_data["detailed_analysis"].get("symbols")
 
     # Create comment body
-    # Note: ELF files (if provided) are from the final build when test_build_components
+    # Note: Memory totals (RAM/Flash) are summed across all builds if multiple were run.
-    # runs multiple builds. Memory totals (RAM/Flash) are already summed across all builds.
     comment_body = create_comment_body(
         components=components,
         platform=args.platform,
@@ -651,10 +565,10 @@ def main() -> int:
         target_flash=args.target_flash,
         pr_ram=args.pr_ram,
         pr_flash=args.pr_flash,
-        target_elf=args.target_elf,
+        target_analysis=target_analysis,
-        pr_elf=args.pr_elf,
+        pr_analysis=pr_analysis,
-        objdump_path=objdump_path,
+        target_symbols=target_symbols,
-        readelf_path=readelf_path,
+        pr_symbols=pr_symbols,
     )
 
     # Post or update comment

script/ci_memory_impact_extract.py

@@ -9,11 +9,14 @@ The script reads compile output from stdin and looks for the standard
 PlatformIO output format:
     RAM:   [====      ]  36.1% (used 29548 bytes from 81920 bytes)
     Flash: [===       ]  34.0% (used 348511 bytes from 1023984 bytes)
+
+Optionally performs detailed memory analysis if a build directory is provided.
 """
 
 from __future__ import annotations
 
 import argparse
+import json
 from pathlib import Path
 import re
 import sys
@@ -60,6 +63,87 @@ def extract_from_compile_output(output_text: str) -> tuple[int | None, int | Non
     return total_ram, total_flash
 
 
+def run_detailed_analysis(build_dir: str) -> dict | None:
+    """Run detailed memory analysis on build directory.
+
+    Args:
+        build_dir: Path to ESPHome build directory
+
+    Returns:
+        Dictionary with analysis results or None if analysis fails
+    """
+    from esphome.analyze_memory import MemoryAnalyzer
+    from esphome.platformio_api import IDEData
+
+    build_path = Path(build_dir)
+    if not build_path.exists():
+        print(f"Build directory not found: {build_dir}", file=sys.stderr)
+        return None
+
+    # Find firmware.elf
+    elf_path = None
+    for elf_candidate in [
+        build_path / "firmware.elf",
+        build_path / ".pioenvs" / build_path.name / "firmware.elf",
+    ]:
+        if elf_candidate.exists():
+            elf_path = str(elf_candidate)
+            break
+
+    if not elf_path:
+        print(f"firmware.elf not found in {build_dir}", file=sys.stderr)
+        return None
+
+    # Find idedata.json
+    device_name = build_path.name
+    idedata_path = Path.home() / ".esphome" / "idedata" / f"{device_name}.json"
+
+    idedata = None
+    if idedata_path.exists():
+        try:
+            with open(idedata_path, encoding="utf-8") as f:
+                raw_data = json.load(f)
+            idedata = IDEData(raw_data)
+        except (json.JSONDecodeError, OSError) as e:
+            print(f"Warning: Failed to load idedata: {e}", file=sys.stderr)
+
+    try:
+        analyzer = MemoryAnalyzer(elf_path, idedata=idedata)
+        components = analyzer.analyze()
+
+        # Convert to JSON-serializable format
+        result = {
+            "components": {},
+            "symbols": {},
+        }
+
+        for name, mem in components.items():
+            result["components"][name] = {
+                "text": mem.text_size,
+                "rodata": mem.rodata_size,
+                "data": mem.data_size,
+                "bss": mem.bss_size,
+                "flash_total": mem.flash_total,
+                "ram_total": mem.ram_total,
+                "symbol_count": mem.symbol_count,
+            }
+
+        # Build symbol map
+        for section in analyzer.sections.values():
+            for symbol_name, size, _ in section.symbols:
+                if size > 0:
+                    demangled = analyzer._demangle_symbol(symbol_name)
+                    result["symbols"][demangled] = size
+
+        return result
+    except Exception as e:
+        print(f"Warning: Failed to run detailed analysis: {e}", file=sys.stderr)
+        import traceback
+
+        traceback.print_exc(file=sys.stderr)
+        return None
+
+
 def main() -> int:
     """Main entry point."""
     parser = argparse.ArgumentParser(
@@ -70,6 +154,14 @@ def main() -> int:
         action="store_true",
         help="Output to GITHUB_OUTPUT environment file",
     )
+    parser.add_argument(
+        "--build-dir",
+        help="Optional build directory for detailed memory analysis",
+    )
+    parser.add_argument(
+        "--output-json",
+        help="Optional path to save detailed analysis JSON",
+    )
 
     args = parser.parse_args()
 
@@ -108,6 +200,26 @@ def main() -> int:
     print(f"Total RAM: {ram_bytes} bytes", file=sys.stderr)
     print(f"Total Flash: {flash_bytes} bytes", file=sys.stderr)
 
+    # Run detailed analysis if build directory provided
+    detailed_analysis = None
+    if args.build_dir:
+        print(f"Running detailed analysis on {args.build_dir}", file=sys.stderr)
+        detailed_analysis = run_detailed_analysis(args.build_dir)
+
+    # Save JSON output if requested
+    if args.output_json:
+        output_data = {
+            "ram_bytes": ram_bytes,
+            "flash_bytes": flash_bytes,
+            "detailed_analysis": detailed_analysis,
+        }
+
+        output_path = Path(args.output_json)
+        output_path.parent.mkdir(parents=True, exist_ok=True)
+        with open(output_path, "w", encoding="utf-8") as f:
+            json.dump(output_data, f, indent=2)
+        print(f"Saved analysis to {args.output_json}", file=sys.stderr)
+
     if args.output_env:
         # Output to GitHub Actions
         write_github_output(