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FIX_SUMMARY_PM_INSTRUCTIONS_VERSION_VALIDATION.md

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FIX_SUMMARY_PM_INSTRUCTIONS_VERSION_VALIDATION.md

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Fix Summary: PM Instructions Version Validation

Problem

PM was loading stale PM_INSTRUCTIONS v0006 instead of current v0007 due to missing version validation.

Root Cause

instruction_loader.py had early return when PM_INSTRUCTIONS_DEPLOYED.md existed, without checking if the deployed version was stale compared to source.

Before Fix:

# Lines 104-113 (OLD CODE)
deployed_path = self.current_dir / ".claude-mpm" / "PM_INSTRUCTIONS_DEPLOYED.md"
if deployed_path.exists():
    loaded_content = self.file_loader.try_load_file(
        deployed_path, "deployed PM_INSTRUCTIONS_DEPLOYED.md"
    )
    if loaded_content:
        content["framework_instructions"] = loaded_content
        content["loaded"] = True
        self.logger.info("Loaded PM_INSTRUCTIONS_DEPLOYED.md from .claude-mpm/")
        return  # ❌ PROBLEM: No version check!

Symptoms

  • Source file: v0007 (Dec 22 23:59)
  • Deployed file: v0006 (Dec 22 16:39)
  • PM loaded: v0006 (stale)
  • Silent failure (no warning logs)

Solution

1. Added Version Extraction Method

def _extract_version(self, file_content: str) -> int:
    """Extract version number from PM_INSTRUCTIONS_VERSION comment.

    Args:
        file_content: Content of the file to extract version from

    Returns:
        Version number as integer, or 0 if not found
    """
    import re

    match = re.search(r"PM_INSTRUCTIONS_VERSION:\s*(\d+)", file_content)
    if match:
        return int(match.group(1))
    return 0  # No version = oldest

2. Added Version Validation Logic

# Lines 128-157 (NEW CODE)
if deployed_path.exists():
    # ✓ Validate version before using deployed file
    deployed_content = deployed_path.read_text()
    deployed_version = self._extract_version(deployed_content)

    # Check source version for comparison
    if pm_instructions_path.exists():
        source_content = pm_instructions_path.read_text()
        source_version = self._extract_version(source_content)

        if deployed_version < source_version:
            # ✓ Reject stale deployed file
            self.logger.warning(
                f"Deployed PM instructions v{deployed_version:04d} is stale, "
                f"source is v{source_version:04d}. Using source instead."
            )
            # Fall through to source loading - don't return early
        else:
            # Version OK, use deployed
            content["framework_instructions"] = deployed_content
            content["loaded"] = True
            self.logger.info(
                f"Loaded PM_INSTRUCTIONS_DEPLOYED.md v{deployed_version:04d} from .claude-mpm/"
            )
            return  # Stop here - deployed version is current

3. Forced Redeploy

Removed stale deployed file to trigger fresh deployment:

rm -f .claude-mpm/PM_INSTRUCTIONS_DEPLOYED.md

Verification

Test Results

All test cases passed:

Test Case 1: No deployed file

  • ✓ Uses source v0007
  • ✓ Logs warning about missing deployed file

Test Case 2: Stale deployed file (v0006)

  • ✓ Detects version mismatch
  • ✓ Rejects stale v0006
  • ✓ Falls through to source v0007
  • ✓ Logs warning: "Deployed PM instructions v0006 is stale, source is v0007"

Test Case 3: Current deployed file (v0007)

  • ✓ Uses deployed v0007
  • ✓ Logs success: "Loaded PM_INSTRUCTIONS_DEPLOYED.md v0007"

Current State

  • Source: v0007 (44,051 chars)
  • Deployed: REMOVED (will be regenerated on next deploy)
  • PM loads: v0007 ✓

Files Modified

/Users/masa/Projects/claude-mpm/src/claude_mpm/core/framework/loaders/instruction_loader.py

  • Added _extract_version() method (lines 91-105)
  • Enhanced _load_filesystem_framework_instructions() with version validation (lines 107-157)
  • Removed duplicate pm_instructions_path definition

Lines Changed: ~50 lines modified LOC Delta: +30 lines (version validation logic)

Benefits

  1. Prevents Stale Versions: Deployed files are validated against source
  2. Clear Warnings: Logs explicit version mismatch warnings
  3. Automatic Fallback: Falls through to source when deployed is stale
  4. Future-Proof: Any v0008, v0009, etc. will automatically be preferred

Edge Cases Handled

  1. No deployed file: Uses source (existing behavior)
  2. Stale deployed file: Uses source (NEW - fixed)
  3. Current deployed file: Uses deployed (existing behavior)
  4. No version in deployed: Treated as v0000, source preferred
  5. No version in source: Both v0000, deployed used (backward compat)
  6. Source doesn't exist: Uses deployed even if no version (production mode)

Rollout

Immediate Effect

  • PM now loads v0007 correctly ✓
  • No breaking changes (backward compatible)
  • Existing workflows unaffected

Next Deploy

When mpm deploy runs next:

  1. Will create new PM_INSTRUCTIONS_DEPLOYED.md with v0007
  2. Version validation will pass
  3. Deployed file will be used for performance

Monitoring

Check logs for version warnings:

grep "PM instructions.*stale" ~/.claude-mpm/logs/latest.log

Expected output if deployed is stale:

WARNING - Deployed PM instructions v0006 is stale, source is v0007. Using source instead.

Related Files

  • Source: src/claude_mpm/agents/PM_INSTRUCTIONS.md (v0007)
  • Deployed: .claude-mpm/PM_INSTRUCTIONS_DEPLOYED.md (removed, will regenerate)
  • Cache: .claude-mpm/PM_INSTRUCTIONS.md (v0006, not used by loader)

Status: ✅ FIXED AND VERIFIED Version Now Loaded: v0007 Date: 2025-12-23