# Propagate-Changes Workflow Failure - Investigation Report **Date:** January 30, 2026 **Investigator:** Planning Agent **Status:** 🔴 ROOT CAUSE IDENTIFIED - Configuration file blocking workflow changes --- ## Executive Summary Investigation of workflow run [#21532969700](https://github.com/Wikid82/Charon/actions/runs/21532969700/job/62053071596) reveals that the **propagate-changes workflow completed successfully but did NOT create a PR** because `.github/workflows/` is still listed in the `sensitive_paths` configuration file, causing all workflow file changes to be blocked from propagation. **Root Cause:** Mismatch between workflow code comment (claiming `.github/workflows/` was removed from sensitive paths) and the actual configuration file (`.github/propagate-config.yml`) which still blocks workflow paths. --- ## 1. Root Cause Analysis ### 🔴 CRITICAL: Configuration File Still Blocks Workflow Changes **Evidence from `.github/propagate-config.yml`:** ```yaml sensitive_paths: - scripts/history-rewrite/ - data/backups - docs/plans/history_rewrite.md - .github/workflows/ # <-- THIS BLOCKS ALL WORKFLOW CHANGES - scripts/history-rewrite/preview_removals.sh - scripts/history-rewrite/clean_history.sh ``` **Contradicting Comment in Workflow (line 84-85):** ```javascript // NOTE: .github/workflows/ was removed from defaults - workflow updates SHOULD propagate // to ensure downstream branches have correct CI/CD configurations ``` ### Logic Flow That Caused the Skip 1. Push made to `main` branch (triggering workflow) 2. Workflow compared `main` to `development` 3. Found files changed included `.github/workflows/*` paths 4. Loaded `.github/propagate-config.yml` which contains `.github/workflows/` 5. **Matched sensitive path** → `core.info()` logged skip message 6. PR creation skipped, workflow exits with green status ✅ --- ## 2. Other Potential Causes Eliminated | Potential Cause | Verdict | Evidence | |----------------|---------|----------| | Push by github-actions[bot] | ❌ Unlikely | User-triggered push would have different actor | | `github.event.pusher == null` | ❌ Unlikely | Push events always have pusher context | | Main already synced with dev | ❌ No | Workflow CI changes would create diff | | Existing open PR | ❌ Unknown | Would need `gh pr list` to verify | | **Sensitive path blocking** | ✅ **ROOT CAUSE** | `.github/workflows/` in config file | --- ## 3. Recommended Fix ### Option A: Remove `.github/workflows/` from Sensitive Paths (Recommended) Edit `.github/propagate-config.yml`: ```yaml sensitive_paths: - scripts/history-rewrite/ - data/backups - docs/plans/history_rewrite.md # REMOVED: .github/workflows/ - workflow updates should propagate - scripts/history-rewrite/preview_removals.sh - scripts/history-rewrite/clean_history.sh ``` **Rationale:** - CI/CD changes SHOULD propagate to keep all branches in sync - The original intent (documented in workflow comment) was to allow this - Downstream branches with outdated workflows cause CI failures ### Option B: Add Specific Exclusions Instead If certain workflows should NOT propagate, use specific paths: ```yaml sensitive_paths: - scripts/history-rewrite/ - data/backups - docs/plans/history_rewrite.md - .github/workflows/propagate-changes.yml # Only block self-propagation - scripts/history-rewrite/preview_removals.sh - scripts/history-rewrite/clean_history.sh ``` --- ## 4. Additional Findings ### Workflow Logic Analysis The workflow has robust logic for: - ✅ Checking existing PRs before creating duplicates - ✅ Comparing commits (ahead_by check) - ✅ Loading external config file for sensitive paths - ✅ Proper error handling with `core.warning()` ### Potential Edge Case: Skip Condition ```yaml if: github.actor != 'github-actions[bot]' && github.event.pusher != null ``` This condition is **generally safe**, but: - If a merge is performed by GitHub's merge queue or rebase, `pusher` context may vary - Consider adding logging to track when this condition fails --- ## 5. Verification Steps After Fix 1. **Apply fix** to `.github/propagate-config.yml` 2. **Push a test change** to `main` that includes workflow modifications 3. **Verify PR creation** in GitHub Actions logs 4. **Check `core.info()` messages** for: - `"Checking propagation from main to development..."` - `"Created PR #XXX to merge main into development"` --- ## 6. Previous Investigation (Archived) The following sections document a previous investigation into Renovate and Playwright configuration issues. --- # Renovate and Playwright Configuration Issues - Investigation Report (Archived) **Date:** January 30, 2026 **Investigator:** Planning Agent **Status:** ⚠️ CRITICAL - Multiple configuration issues found --- ## Executive Summary (Archived) Investigation reveals that **both Renovate and Playwright workflows have incorrect configurations** that deviate from the user's required behavior. The Renovate configuration is missing feature branch support and has incorrect automerge settings. The Playwright workflow is missing push event triggers. --- ## 1. Renovate Configuration Issues ### File Locations - **Primary Config:** `.github/renovate.json` (154 lines) - **Workflow:** `.github/workflows/renovate.yml` (31 lines) ### 🔴 CRITICAL ISSUE #1: Missing Feature Branch Support **Current State (BROKEN):** ```json "baseBranches": [ "development" ] ``` - **Line:** `.github/renovate.json:9` - **Problem:** Only targets `development` branch - **Impact:** Feature branches (`feature/*`) receive NO Renovate updates **Required State:** ```json "baseBranches": [ "development", "feature/*" ] ``` --- ### 🔴 CRITICAL ISSUE #2: Automerge Enabled Globally **Current State (BROKEN):** ```json "automerge": true, "automergeType": "pr", "platformAutomerge": true, ``` - **Lines:** `.github/renovate.json:28-30` - **Problem:** All non-major updates auto-merge immediately - **Impact:** Updates merge before compatibility is proven **Required State:** - **Feature Branches:** Manual approval required (automerge: false) - **Development Branch:** Let PRs sit until proven compatible - **Major Updates:** Already correctly set to manual review (line 148) --- ### 🟡 ISSUE #3: Grouped Updates Configuration **Current State (PARTIALLY CORRECT):** ```json { "description": "THE MEGAZORD: Group ALL non-major updates (NPM, Docker, Go, Actions) into one weekly PR", "matchPackagePatterns": ["*"], "matchUpdateTypes": [ "minor", "patch", "pin", "digest" ], "groupName": "weekly-non-major-updates", "automerge": true } ``` - **Lines:** `.github/renovate.json:116-127` - **Status:** ✅ Grouping behavior is CORRECT - **Problem:** ❌ Automerge should be conditional on branch --- ### 🟢 CORRECT Configuration **These are working as intended:** - ✅ Major updates are separate and require manual review (line 145-148) - ✅ Weekly schedule (Monday 8am, line 23-25) - ✅ Grouped minor/patch updates (line 116-127) - ✅ Custom managers for Dockerfile, scripts (lines 32-113) --- ## 2. Playwright Workflow Issues ### File Locations - **Primary Workflow:** `.github/workflows/playwright.yml` (319 lines) - **Alternative E2E:** `.github/workflows/e2e-tests.yml` (533 lines) ### 🔴 CRITICAL ISSUE #4: Missing Push Event Triggers **Current State (BROKEN):** ```yaml on: workflow_run: workflows: ["Docker Build, Publish & Test"] types: - completed workflow_dispatch: inputs: pr_number: description: 'PR number to test (optional)' required: false type: string ``` - **Lines:** `.github/workflows/playwright.yml:4-15` - **Problem:** Only runs after `docker-build.yml` completes, NOT on direct pushes - **Impact:** User pushed code and Playwright tests did NOT run **Root Cause Analysis:** The workflow uses `workflow_run` trigger which: 1. Waits for "Docker Build, Publish & Test" to finish 2. Only triggers if that workflow was triggered by `pull_request` or `push` 3. BUT the condition on line 28-30 filters execution: ```yaml if: >- github.event_name == 'workflow_dispatch' || ((github.event.workflow_run.event == 'pull_request' || github.event.workflow_run.event == 'push') && github.event.workflow_run.conclusion == 'success') ``` **Required State:** ```yaml on: push: branches: - main - development - 'feature/**' paths: - 'frontend/**' - 'backend/**' - 'tests/**' - 'playwright.config.js' - '.github/workflows/playwright.yml' pull_request: branches: - main - development - 'feature/**' workflow_run: workflows: ["Docker Build, Publish & Test"] types: - completed workflow_dispatch: inputs: pr_number: description: 'PR number to test (optional)' required: false type: string ``` --- ### 🟡 ISSUE #5: Alternative E2E Workflow Exists **Discovery:** - File: `.github/workflows/e2e-tests.yml` - **Lines 31-50:** Has CORRECT push/PR triggers: ```yaml on: pull_request: branches: - main - development - 'feature/**' paths: - 'frontend/**' - 'backend/**' - 'tests/**' - 'playwright.config.js' - '.github/workflows/e2e-tests.yml' push: branches: - main - development - 'feature/**' ``` **Question:** Are there TWO Playwright workflows? - `playwright.yml` - Runs after Docker build (BROKEN triggers) - `e2e-tests.yml` - Runs on push/PR (CORRECT triggers) **Impact:** Confusion about which workflow should be the primary E2E test runner --- ## 3. Required Changes Summary ### Renovate Configuration Changes **File:** `.github/renovate.json` #### Change #1: Add Feature Branch Support ```diff "baseBranches": [ - "development" + "development", + "feature/*" ], ``` - **Line:** 9 - **Priority:** 🔴 CRITICAL #### Change #2: Conditional Automerge by Branch ```diff - "automerge": true, - "automergeType": "pr", - "platformAutomerge": true, ``` Replace with: ```json "packageRules": [ { "description": "Feature branches: Require manual approval", "matchBaseBranches": ["feature/*"], "automerge": false }, { "description": "Development branch: Automerge after compatibility proven", "matchBaseBranches": ["development"], "automerge": true, "automergeType": "pr", "platformAutomerge": true, "minimumReleaseAge": "3 days" } ] ``` - **Lines:** 28-30 (delete) + add to packageRules section - **Priority:** 🔴 CRITICAL #### Change #3: Update Grouped Updates Rule ```diff { "description": "THE MEGAZORD: Group ALL non-major updates (NPM, Docker, Go, Actions) into one weekly PR", "matchPackagePatterns": ["*"], "matchUpdateTypes": [ "minor", "patch", "pin", "digest" ], "groupName": "weekly-non-major-updates", - "automerge": true } ``` - **Lines:** 116-127 - **Priority:** 🟡 HIGH (automerge now controlled by branch-specific rules) --- ### Playwright Workflow Changes **File:** `.github/workflows/playwright.yml` #### Option A: Add Direct Push Triggers (Recommended) ```diff on: + push: + branches: + - main + - development + - 'feature/**' + paths: + - 'frontend/**' + - 'backend/**' + - 'tests/**' + - 'playwright.config.js' + - '.github/workflows/playwright.yml' + + pull_request: + branches: + - main + - development + - 'feature/**' + workflow_run: workflows: ["Docker Build, Publish & Test"] types: - completed ``` - **Lines:** 4 (insert after) - **Priority:** 🔴 CRITICAL #### Option B: Consolidate Workflows **Alternative Solution:** 1. Delete `playwright.yml` (post-docker workflow) 2. Keep `e2e-tests.yml` as the primary E2E test runner 3. Update documentation to reference `e2e-tests.yml` **Pros:** - `e2e-tests.yml` already has correct triggers - Includes sharding and coverage collection - More comprehensive test execution **Cons:** - Requires updating CI documentation - May have different artifact/image handling --- ## 4. Verification Steps ### After Applying Renovate Changes 1. **Create test feature branch:** ```bash git checkout -b feature/test-renovate-config ``` 2. **Manually trigger Renovate:** ```bash # Via GitHub Actions UI # Or via API gh workflow run renovate.yml ``` 3. **Verify Renovate creates PRs against feature branch** 4. **Verify automerge behavior:** - Feature branch: PR should NOT automerge - Development branch: PR should automerge after 3 days ### After Applying Playwright Changes 1. **Create test commit on feature branch:** ```bash git checkout -b feature/test-playwright-trigger # Make trivial change to frontend git commit -am "test: trigger playwright" git push origin feature/test-playwright-trigger ``` 2. **Verify Playwright workflow runs immediately on push** 3. **Check GitHub Actions UI:** - Workflow should appear in "Actions" tab - Status should show "running" or "completed" - Should NOT wait for docker-build workflow --- ## 5. Root Cause Analysis ### Why These Changes Occurred **Hypothesis:** Another AI model likely: 1. **Simplified baseBranches** to reduce complexity 2. **Enabled automerge globally** to reduce manual PR overhead 3. **Removed direct push triggers** to avoid duplicate test runs **Problems with this approach:** - Violates user's explicit requirements for manual feature branch approval - Creates risk by auto-merging untested updates - Breaks CI/CD by preventing push-triggered tests --- ## 6. Implementation Priority ### Immediate (Block Development) 1. 🔴 **Renovate:** Add feature branch support (`.github/renovate.json:9`) 2. 🔴 **Playwright:** Add push triggers (`.github/workflows/playwright.yml:4`) ### High Priority (Block Production) 3. 🟡 **Renovate:** Fix automerge behavior (branch-specific rules) ### Medium Priority (Technical Debt) 4. 🟢 **Consolidate:** Decide on single E2E workflow (playwright.yml vs e2e-tests.yml) --- ## 7. Configuration Comparison Table | Setting | Current (Broken) | Required | Priority | |---------|-----------------|----------|----------| | **Renovate baseBranches** | `["development"]` | `["development", "feature/*"]` | 🔴 CRITICAL | | **Renovate automerge** | Global `true` | Conditional by branch | 🔴 CRITICAL | | **Renovate grouping** | ✅ Weekly grouped | ✅ Weekly grouped | 🟢 OK | | **Renovate major updates** | ✅ Manual review | ✅ Manual review | 🟢 OK | | **Playwright triggers** | `workflow_run` only | `push` + `pull_request` + `workflow_run` | 🔴 CRITICAL | | **E2E workflow count** | 2 workflows | 1 workflow (consolidate) | 🟡 HIGH | --- ## 8. Next Steps 1. **Review this specification** with the user 2. **Apply critical changes** to Renovate and Playwright configs 3. **Test changes** on feature branch before merging 4. **Document decision** on e2e-tests.yml vs playwright.yml consolidation 5. **Update CI/CD documentation** to reflect correct workflow triggers --- ## Appendix: File References ### Renovate Configuration - **Primary Config:** `.github/renovate.json` - Line 9: `baseBranches` (NEEDS FIX) - Lines 28-30: Global `automerge` (NEEDS FIX) - Lines 116-127: Grouped updates (NEEDS UPDATE) - Lines 145-148: Major updates (CORRECT) ### Playwright Workflows - **Primary:** `.github/workflows/playwright.yml` - Lines 4-15: `on:` triggers (NEEDS FIX) - Lines 28-30: Execution condition (REVIEW) - **Alternative:** `.github/workflows/e2e-tests.yml` - Lines 31-50: `on:` triggers (CORRECT - consider as model) --- **End of Investigation Report** 2. Docker Run (One Command) 3. Alternative: GitHub Container Registry **Code Sample:** ```yaml services: charon: image: wikid82/charon:latest container_name: charon restart: unless-stopped ``` **Verdict:** Zero mention of standalone binaries, native installation, or platform-specific installers. --- ### 3. Distribution Method ✅ **Source:** `docs/getting-started.md` (Lines 1-150) **Supported Installation:** - Docker Hub: `wikid82/charon:latest` - GitHub Container Registry: `ghcr.io/wikid82/charon:latest` **Migration Commands:** ```bash docker exec charon /app/charon migrate ``` **Verdict:** All documentation assumes Docker runtime. --- ### 4. GoReleaser Configuration ⚠️ **Source:** `.goreleaser.yaml` (Lines 1-122) **Current Build Targets:** ```yaml builds: - id: linux goos: [linux] goarch: [amd64, arm64] - id: windows goos: [windows] goarch: [amd64] - id: darwin goos: [darwin] goarch: [amd64, arm64] ``` **Observations:** - Builds binaries for `linux`, `windows`, `darwin` - Creates archives (`.tar.gz`, `.zip`) - Generates Debian/RPM packages - **These artifacts are never referenced in user documentation** - **No installation instructions for standalone binaries** **Verdict:** Unnecessary build targets creating unused artifacts. --- ### 5. Release Workflow Analysis ✅ **Source:** `.github/workflows/release-goreleaser.yml` **What Gets Published:** 1. ✅ Docker images (multi-platform: `linux/amd64`, `linux/arm64`) 2. ✅ SBOM (Software Bill of Materials) 3. ✅ SLSA provenance attestation 4. ✅ Cryptographic signatures (Cosign) 5. ⚠️ Standalone binaries (unused) 6. ⚠️ Archives (`.tar.gz`, `.zip` - unused) 7. ⚠️ Debian/RPM packages (unused) **Verdict:** Docker images are the primary (and only documented) distribution method. --- ### 6. Dockerfile Base Image ✅ **Source:** `Dockerfile` (Lines 1-50) ```dockerfile # renovate: datasource=docker depName=debian versioning=docker ARG CADDY_IMAGE=debian:trixie-slim@sha256:... ``` **Verdict:** Debian-based Linux container. No Windows/macOS container images exist. --- ### 7. User Base & Use Cases ✅ **Source:** `ARCHITECTURE.md` **Target Audience:** > "Simplify website and application hosting for **home users and small teams**" **Deployment Model:** > "Monolithic architecture packaged as a **single Docker container**" **Verdict:** Docker-first design with no enterprise/cloud-native multi-platform requirements. --- ## Current Issue: Disk Space Implementation **Original Problem:** ```go // backend/internal/models/systemmetrics.go func UpdateDiskMetrics(db *gorm.DB) error { // TODO: Cross-platform disk space implementation // Currently hardcoded to "/" for Linux // Need platform detection for Windows (C:\) and macOS } ``` **Why This Is Complex:** - Windows uses drive letters (`C:\`, `D:\`) - macOS uses `/System/Volumes/Data` - Windows requires `golang.org/x/sys/windows` syscalls - macOS requires `golang.org/x/sys/unix` with special mount handling - Testing requires platform-specific CI runners **Why This Is Unnecessary:** - Charon **only runs in Linux containers** (Debian base image) - The host OS (Windows/macOS) is irrelevant - Docker abstracts it - The disk space check should monitor `/app/data` (container filesystem) --- ## Old Plan Context (Now Superseded) ### Previous Problem Description The `GetAvailableSpace()` method in `backend/internal/services/backup_service.go` (lines 363-394) used Unix-specific syscalls that blocked Windows cross-compilation. This was mistakenly interpreted as requiring platform-specific implementations. ### Why The Problem Was Misunderstood - **Assumption**: Users need to run Charon natively on Windows/macOS - **Reality**: Charon is Docker-only, runs in Linux containers regardless of host OS - **Root Cause**: GoReleaser configured to build unused Windows/macOS binaries --- ## Recommended Solution ### Simple Solution: Remove Unnecessary Build Targets **Changes to `.goreleaser.yaml`:** ```yaml builds: - id: linux dir: backend main: ./cmd/api binary: charon env: - CGO_ENABLED=0 goos: - linux goarch: - amd64 - arm64 ldflags: - -s -w - -X github.com/Wikid82/charon/backend/internal/version.Version={{.Version}} - -X github.com/Wikid82/charon/backend/internal/version.GitCommit={{.Commit}} - -X github.com/Wikid82/charon/backend/internal/version.BuildTime={{.Date}} archives: - formats: - tar.gz id: linux ids: - linux name_template: >- {{ .ProjectName }}_ {{- .Version }}_ {{- .Os }}_ {{- .Arch }} files: - LICENSE - README.md nfpms: - id: packages ids: - linux package_name: charon vendor: Charon homepage: https://github.com/Wikid82/charon maintainer: Wikid82 description: "Charon - A powerful reverse proxy manager" license: MIT formats: - deb - rpm ``` **Removals:** - ❌ `windows` build ID (lines 23-35) - ❌ `darwin` build ID (lines 37-51) - ❌ Windows archive format **Benefits:** - ✅ Faster CI builds (no cross-compilation overhead) - ✅ Smaller release artifacts - ✅ Clearer distribution model (Docker-only) - ✅ Reduced maintenance burden - ✅ No platform-specific disk space code needed --- ### Simplified Disk Space Implementation **File:** `backend/internal/services/backup_service.go` **Current Implementation (already Linux-compatible):** ```go func (s *BackupService) GetAvailableSpace() (int64, error) { var stat syscall.Statfs_t if err := syscall.Statfs(s.BackupDir, &stat); err != nil { return 0, fmt.Errorf("failed to get disk space: %w", err) } bsize := stat.Bsize bavail := stat.Bavail if bsize < 0 { return 0, fmt.Errorf("invalid block size %d", bsize) } if bavail > uint64(math.MaxInt64) { return math.MaxInt64, nil } available := int64(bavail) * int64(bsize) return available, nil } ``` **Recommended Change:** Monitor `/app/data` instead of `/` for more accurate container volume metrics: ```go func (s *BackupService) GetAvailableSpace() (int64, error) { // Monitor the container data volume (or fallback to root) dataPath := "/app/data" var stat syscall.Statfs_t if err := syscall.Statfs(dataPath, &stat); err != nil { // Fallback to root filesystem if data mount doesn't exist if err := syscall.Statfs("/", &stat); err != nil { return 0, fmt.Errorf("failed to get disk space: %w", err) } } // Existing overflow protection logic... bsize := stat.Bsize bavail := stat.Bavail if bsize < 0 { return 0, fmt.Errorf("invalid block size %d", bsize) } if bavail > uint64(math.MaxInt64) { return math.MaxInt64, nil } available := int64(bavail) * int64(bsize) return available, nil } ``` **Rationale:** - Monitors `/app/data` (user's persistent volume) - Falls back to `/` if volume not mounted - No platform detection needed - Works in all Docker environments (Linux host, macOS Docker Desktop, Windows WSL2) --- ## Decision Matrix | Approach | Pros | Cons | Recommendation | |----------|------|------|----------------| | **Remove Windows/macOS targets** | ✅ Aligns with actual architecture
✅ Faster CI builds
✅ Simpler codebase
✅ No cross-platform complexity | ⚠️ Can't distribute standalone binaries (never documented anyway) | **✅ RECOMMENDED** | | **Keep all platforms** | ⚠️ "Future-proofs" for potential pivot | ❌ Wastes CI resources
❌ Adds complexity
❌ Misleads users
❌ No documented use case | ❌ NOT RECOMMENDED | --- ## Implementation Tasks ### Task 1: Update GoReleaser Configuration **File:** `.goreleaser.yaml` **Changes:** - Remove `windows` and `darwin` build definitions - Remove Windows archive format (zip) - Keep only `linux/amd64` and `linux/arm64` - Update `nfpms` to reference only `linux` build ID **Estimated Effort:** 15 minutes --- ### Task 2: Remove Zig Cross-Compilation from CI **File:** `.github/workflows/release-goreleaser.yml` **Changes:** - Remove `Install Cross-Compilation Tools (Zig)` step (lines 52-56) - No longer needed for Linux-only builds **Estimated Effort:** 5 minutes --- ### Task 3: Simplify Disk Metrics (Optional Enhancement) **File:** `backend/internal/models/systemmetrics.go` **Changes:** - Update `UpdateDiskMetrics()` to monitor `/app/data` instead of `/` - Add fallback to `/` if data volume not mounted - Update comments to clarify Docker-only scope **Estimated Effort:** 10 minutes --- ### Task 4: Update Documentation **Files:** - `ARCHITECTURE.md` - Add note about Docker-only distribution in "Build & Release Process" section - `CONTRIBUTING.md` - Remove any Windows/macOS build instructions **Estimated Effort:** 10 minutes --- ## Validation Checklist After implementation: - [ ] CI release workflow completes successfully - [ ] Docker images build for `linux/amd64` and `linux/arm64` - [ ] No Windows/macOS binaries in GitHub releases - [ ] `backend/internal/services/backup_service.go` still compiles - [ ] E2E tests pass against built image - [ ] Documentation reflects Docker-only distribution model --- ## Future Considerations **If standalone binary distribution is needed in the future:** 1. **Revisit Architecture:** - Extract backend into CLI tool - Bundle frontend as embedded assets - Provide platform-specific installers (`.exe`, `.dmg`, `.deb`) 2. **Update Documentation:** - Add installation guides for each platform - Provide troubleshooting for native installs 3. **Re-add Build Targets:** - Restore `windows` and `darwin` in `.goreleaser.yaml` - Implement platform detection for disk metrics with build tags - Add CI runners for each platform (Windows Server, macOS) **Current Priority:** None. Docker-only distribution meets all documented use cases. --- ## Conclusion Charon is **explicitly designed, documented, and distributed as a Docker-only application**. The Windows and macOS build targets in GoReleaser serve no purpose and should be removed. **Recommended Next Steps:** 1. Remove unused build targets from `.goreleaser.yaml` 2. Remove Zig cross-compilation step from release workflow 3. (Optional) Update disk metrics to monitor `/app/data` volume 4. Update documentation to clarify Docker-only scope 5. Proceed with simplified implementation (no platform detection needed) --- **Plan Status:** Ready for Implementation **Confidence Level:** High (100% - all evidence aligns) **Risk Assessment:** Low (removing unused features) **Total Estimated Effort:** 40 minutes (configuration changes + testing) --- ## Archived: Old Plan (Platform-Specific Build Tags) The previous plan assumed cross-platform binary support was needed and proposed implementing platform-specific disk space checks using build tags. This approach is no longer necessary given the Docker-only distribution model. **Key Insight from Research:** - Charon runs in Linux containers regardless of host OS - Windows/macOS users run Docker Desktop (which uses Linux VMs internally) - The container always sees a Linux filesystem - No platform detection needed **Historical Context:** } // Safe to convert now availBlocks := int64(bavail) blockSize := int64(bsize) // Check for multiplication overflow if availBlocks > 0 && blockSize > math.MaxInt64/availBlocks { return math.MaxInt64, nil } return availBlocks * blockSize, nil } ``` **Key Points:** - Preserves existing overflow protection logic - Maintains gosec compliance (G115) - No functional changes from current implementation --- ### Phase 3: Windows Implementation #### File: `backup_service_disk_windows.go` ```go //go:build windows package services import ( "fmt" "math" "path/filepath" "strings" "golang.org/x/sys/windows" ) // getAvailableSpace returns the available disk space in bytes for the given directory. // Windows implementation using GetDiskFreeSpaceExW with long path support. func getAvailableSpace(dir string) (int64, error) { // Normalize path for Windows cleanPath := filepath.Clean(dir) // Handle long paths (>260 chars) by prepending \\?\ prefix // This enables paths up to 32,767 characters on Windows if len(cleanPath) > 260 && !strings.HasPrefix(cleanPath, `\\?\`) { // Convert to absolute path first absPath, err := filepath.Abs(cleanPath) if err != nil { return 0, fmt.Errorf("failed to resolve absolute path for '%s': %w", dir, err) } // Add long path prefix cleanPath = `\\?\` + absPath } // Convert to UTF-16 for Windows API utf16Ptr, err := windows.UTF16PtrFromString(cleanPath) if err != nil { return 0, fmt.Errorf("failed to convert path '%s' to UTF16: %w", dir, err) } var freeBytesAvailable, totalBytes, totalFreeBytes uint64 err = windows.GetDiskFreeSpaceEx( utf16Ptr, &freeBytesAvailable, &totalBytes, &totalFreeBytes, ) if err != nil { return 0, fmt.Errorf("failed to get disk space for path '%s': %w", dir, err) } // freeBytesAvailable already accounts for quotas and user restrictions // Check if value exceeds max int64 if freeBytesAvailable > uint64(math.MaxInt64) { return math.MaxInt64, nil } return int64(freeBytesAvailable), nil } ``` **Key Points:** 1. **API Choice**: `GetDiskFreeSpaceEx` vs `GetDiskFreeSpace` - `GetDiskFreeSpaceEx` respects disk quotas (correct behavior) - Returns bytes directly (no block size calculation needed) - Supports paths > 260 characters with proper handling 2. **Path Handling**: - Converts Go string to UTF-16 (Windows native format) - Handles Unicode paths correctly - **Windows Long Path Support**: For paths > 260 characters, automatically prepends `\\?\` prefix - Normalizes forward slashes to backslashes for Windows API compatibility 3. **Overflow Protection**: - Maintains same logic as Unix version - Caps at `math.MaxInt64` for consistency 4. **Return Value**: - Uses `freeBytesAvailable` (not `totalFreeBytes`) - Correctly accounts for user quotas and restrictions --- ### Phase 4: Refactor Main File #### File: `backup_service.go` **Modification:** ```go // BEFORE (lines 363-394): Direct implementation // AFTER: Delegate to platform-specific function func (s *BackupService) GetAvailableSpace() (int64, error) { return getAvailableSpace(s.BackupDir) } ``` **Changes:** 1. Remove `var stat syscall.Statfs_t` and all calculation logic 2. Replace with single call to platform-specific `getAvailableSpace()` 3. Platform selection handled at compile-time via build tags **Benefits:** - Simplified main file - No runtime conditionals - Zero performance overhead - Same API for all callers --- ### Phase 5: Dependency Management #### 5.1 Add Windows Dependency **Command:** ```bash cd backend go get golang.org/x/sys/windows@latest go mod tidy ``` **Expected `go.mod` Change:** ```go require ( // ... existing deps ... golang.org/x/sys v0.40.0 // existing ) ``` **Note:** `golang.org/x/sys` is already present in `go.mod` (line 95), but we need to ensure `windows` subpackage is available. It's part of the same module, so no new direct dependency needed. #### 5.2 Verify Build Tags **Test Matrix:** ```bash # Test Unix build GOOS=linux GOARCH=amd64 go build ./cmd/api # Test Darwin build GOOS=darwin GOARCH=arm64 go build ./cmd/api # Test Windows build (this currently fails) GOOS=windows GOARCH=amd64 go build ./cmd/api ``` --- ### Phase 6: Testing Strategy #### 6.1 Unit Tests **New Test Files:** ``` backend/internal/services/ ├── backup_service_disk_unix_test.go └── backup_service_disk_windows_test.go ``` **Unix Test (`backup_service_disk_unix_test.go`):** ```go //go:build unix package services import ( "os" "testing" "github.com/stretchr/testify/assert" "github.com/stretchr/testify/require" ) func TestGetAvailableSpace_Unix(t *testing.T) { // Test with temp directory tmpDir := t.TempDir() space, err := getAvailableSpace(tmpDir) require.NoError(t, err) assert.Greater(t, space, int64(0), "Available space should be positive") // Test with invalid directory space, err = getAvailableSpace("/nonexistent/path") assert.Error(t, err) assert.Equal(t, int64(0), space) } func TestGetAvailableSpace_UnixRootFS(t *testing.T) { // Test with root filesystem space, err := getAvailableSpace("/") require.NoError(t, err) assert.Greater(t, space, int64(0)) } func TestGetAvailableSpace_UnixPermissionDenied(t *testing.T) { // Test permission denied scenario // Try to stat a path we definitely don't have access to if os.Getuid() == 0 { t.Skip("Test requires non-root user") } // Most Unix systems have restricted directories restrictedPaths := []string{"/root", "/lost+found"} for _, path := range restrictedPaths { if _, err := os.Stat(path); os.IsNotExist(err) { continue // Path doesn't exist on this system } space, err := getAvailableSpace(path) if err != nil { // Expected: permission denied assert.Contains(t, err.Error(), "failed to get disk space") assert.Equal(t, int64(0), space) return // Test passed } } t.Skip("No restricted paths found to test permission denial") } func TestGetAvailableSpace_UnixSymlink(t *testing.T) { // Test symlink resolution - statfs follows symlinks tmpDir := t.TempDir() targetDir := filepath.Join(tmpDir, "target") symlinkPath := filepath.Join(tmpDir, "link") err := os.Mkdir(targetDir, 0755) require.NoError(t, err) err = os.Symlink(targetDir, symlinkPath) require.NoError(t, err) // Should follow symlink and return space for target space, err := getAvailableSpace(symlinkPath) require.NoError(t, err) assert.Greater(t, space, int64(0)) // Compare with direct target query (should match filesystem) targetSpace, err := getAvailableSpace(targetDir) require.NoError(t, err) assert.Equal(t, targetSpace, space, "Symlink should resolve to same filesystem") } ``` **Windows Test (`backup_service_disk_windows_test.go`):** ```go //go:build windows package services import ( "os" "testing" "github.com/stretchr/testify/assert" "github.com/stretchr/testify/require" ) func TestGetAvailableSpace_Windows(t *testing.T) { // Test with temp directory tmpDir := t.TempDir() space, err := getAvailableSpace(tmpDir) require.NoError(t, err) assert.Greater(t, space, int64(0), "Available space should be positive") // Test with C: drive (usually exists on Windows) space, err = getAvailableSpace("C:\\") require.NoError(t, err) assert.Greater(t, space, int64(0)) } func TestGetAvailableSpace_WindowsInvalidPath(t *testing.T) { // Test with invalid drive letter space, err := getAvailableSpace("Z:\\nonexistent\\path") // May error or return 0 depending on Windows version if err != nil { assert.Equal(t, int64(0), space) } } func TestGetAvailableSpace_WindowsLongPath(t *testing.T) { // Test long path handling (>260 characters) tmpBase := t.TempDir() // Create a deeply nested directory structure to exceed MAX_PATH longPath := tmpBase for i := 0; i < 20; i++ { longPath = filepath.Join(longPath, "verylongdirectorynamewithlotsofcharacters") } err := os.MkdirAll(longPath, 0755) require.NoError(t, err, "Should create long path with \\\\?\\ prefix support") // Test disk space check on long path space, err := getAvailableSpace(longPath) require.NoError(t, err, "Should query disk space for paths >260 chars") assert.Greater(t, space, int64(0), "Available space should be positive") } func TestGetAvailableSpace_WindowsUnicodePath(t *testing.T) { // Test Unicode path handling to ensure UTF-16 conversion works correctly tmpBase := t.TempDir() // Create directory with Unicode characters (emoji, CJK, Arabic) unicodeDirName := "test_🚀_测试_اختبار" unicodePath := filepath.Join(tmpBase, unicodeDirName) err := os.Mkdir(unicodePath, 0755) require.NoError(t, err, "Should create directory with Unicode name") // Test disk space check on Unicode path space, err := getAvailableSpace(unicodePath) require.NoError(t, err, "Should handle Unicode path names") assert.Greater(t, space, int64(0), "Available space should be positive") } func TestGetAvailableSpace_WindowsPermissionDenied(t *testing.T) { // Test permission denied scenario // On Windows, system directories like C:\System Volume Information // typically deny access to non-admin users space, err := getAvailableSpace("C:\\System Volume Information") if err != nil { // Expected: access denied error assert.Contains(t, err.Error(), "failed to get disk space") assert.Equal(t, int64(0), space) } else { // If no error (running as admin), space should still be valid assert.GreaterOrEqual(t, space, int64(0)) } } ``` #### 6.2 Integration Testing **Existing Tests Impact:** - `backend/internal/services/backup_service_test.go` should work unchanged - If tests mock disk space, update mocks to use new signature - Add CI matrix testing for Windows builds **CI/CD Testing:** Add platform-specific test matrix to ensure all implementations are validated: ```yaml # .github/workflows/go-tests.yml name: Go Tests on: pull_request: paths: - 'backend/**/*.go' - 'backend/go.mod' - 'backend/go.sum' push: branches: - main jobs: test-cross-platform: name: Test on ${{ matrix.os }} runs-on: ${{ matrix.os }} strategy: fail-fast: false matrix: os: [ubuntu-latest, macos-latest, windows-latest] go-version: ['1.25.6'] steps: - name: Checkout code uses: actions/checkout@v4 - name: Set up Go uses: actions/setup-go@v5 with: go-version: ${{ matrix.go-version }} cache: true cache-dependency-path: backend/go.sum - name: Run platform-specific tests working-directory: backend run: | go test -v -race -coverprofile=coverage.txt -covermode=atomic ./internal/services/... - name: Upload coverage uses: codecov/codecov-action@v4 with: files: ./backend/coverage.txt flags: ${{ matrix.os }} token: ${{ secrets.CODECOV_TOKEN }} verify-cross-compilation: name: Cross-compile for ${{ matrix.goos }}/${{ matrix.goarch }} runs-on: ubuntu-latest strategy: matrix: include: - goos: linux goarch: amd64 - goos: linux goarch: arm64 - goos: darwin goarch: amd64 - goos: darwin goarch: arm64 - goos: windows goarch: amd64 steps: - name: Checkout code uses: actions/checkout@v4 - name: Set up Go uses: actions/setup-go@v5 with: go-version: '1.25.6' - name: Build for ${{ matrix.goos }}/${{ matrix.goarch }} working-directory: backend env: GOOS: ${{ matrix.goos }} GOARCH: ${{ matrix.goarch }} CGO_ENABLED: 0 run: | go build -v -o /tmp/charon-${{ matrix.goos }}-${{ matrix.goarch }} ./cmd/api ``` #### 6.3 Manual Testing Checklist **Unix/Linux:** - [ ] Backup creation succeeds with sufficient space - [ ] Backup creation fails gracefully with insufficient space - [ ] Log messages show correct available space **Windows:** - [ ] Binary compiles successfully - [ ] Same functionality as Unix version - [ ] Handles UNC paths (\\server\share) - [ ] Respects disk quotas --- ### Phase 7: Documentation Updates #### 7.1 Code Documentation **File-level comments:** ```go // backup_service_disk_unix.go // Platform-specific implementation of disk space queries for Unix-like systems. // This file is compiled only on Linux, macOS, BSD, and other Unix variants. // backup_service_disk_windows.go // Platform-specific implementation of disk space queries for Windows. // Uses Win32 API GetDiskFreeSpaceEx to query filesystem statistics. ``` #### 7.2 Architecture Documentation **Update `ARCHITECTURE.md`:** - Add section on platform-specific implementations - Document build tag strategy - List platform-specific files **Update `docs/development/building.md` (if exists):** - Cross-compilation requirements - Platform-specific testing instructions #### 7.3 Developer Guidance **Create `docs/development/platform-specific-code.md`:** ```markdown # Platform-Specific Code Guidelines ## When to Use Build Tags Use build tags when: - Accessing OS-specific APIs (syscalls, Win32, etc.) - Functionality differs by platform - No cross-platform abstraction exists ## Build Tag Reference - `//go:build unix` - Linux, macOS, BSD, Solaris - `//go:build windows` - Windows - `//go:build darwin` - macOS only - `//go:build linux` - Linux only ## File Naming Convention Pattern: `{feature}_{platform}.go` Examples: - `backup_service_disk_unix.go` - `backup_service_disk_windows.go` ``` --- ### Phase 8: Configuration Updates #### 8.1 Codecov Configuration **Current `codecov.yml` (line 15-31):** ```yaml ignore: - "**/*_test.go" - "**/testdata/**" - "**/mocks/**" ``` **No changes needed:** - Platform-specific files are production code - Should be included in coverage - Tests run on each platform will cover respective implementation **Rationale:** - Unix tests run on Linux CI runners → cover `*_unix.go` - Windows tests run on Windows CI runners → cover `*_windows.go` - Combined coverage shows full platform coverage #### 8.2 .gitignore Updates **Current `.gitignore`:** No changes needed for source files. **Verify exclusions:** ```gitignore # Already covered: *.test *.out backend/bin/ ``` #### 8.3 Linter Configuration **Verify gopls/staticcheck:** - Build tags are standard Go feature - No linter configuration changes needed - GoReleaser will compile each platform separately --- ## Build Validation ### Pre-Merge Checklist **Compilation Tests:** ```bash # Unix targets GOOS=linux GOARCH=amd64 go build -o /dev/null ./backend/cmd/api GOOS=darwin GOARCH=arm64 go build -o /dev/null ./backend/cmd/api # Windows target (currently fails) GOOS=windows GOARCH=amd64 go build -o /dev/null ./backend/cmd/api ``` **Post-Implementation:** All three commands should succeed with exit code 0. **Unit Test Validation:** ```bash # Run on each platform go test ./backend/internal/services/... -v # Expected output includes: # - TestGetAvailableSpace_Unix (on Unix) # - TestGetAvailableSpace_Windows (on Windows) ``` ### GoReleaser Integration **`.goreleaser.yaml` (lines 23-35):** ```yaml - id: windows dir: backend main: ./cmd/api binary: charon env: - CGO_ENABLED=0 # ✅ Maintained: static binary goos: - windows goarch: - amd64 ``` **Expected Behavior After Fix:** - GoReleaser snapshot builds succeed - Windows binary in `dist/windows_windows_amd64_v1/` - Binary size similar to Linux/Darwin variants --- ## Risk Assessment & Mitigation ### Risks | Risk | Likelihood | Impact | Mitigation | |------|-----------|--------|-----------| | Windows API fails on network drives | Medium | Medium | Document UNC path limitations, add error handling | | Path encoding issues (Unicode) | Low | Medium | UTF-16 conversion with error handling | | Quota calculation differs | Low | Low | Use `freeBytesAvailable` (quota-aware) | | Missing test coverage on Windows | Medium | Low | Add CI Windows runner for tests | | Breaking existing Unix behavior | Low | High | Preserve existing logic byte-for-byte | ### Rollback Plan **If Windows implementation causes issues:** 1. Revert to Unix-only with build tag exclusion: ```go //go:build !windows ``` 2. Update GoReleaser to skip Windows target temporarily 3. File issue to investigate Windows-specific failures **Revert Complexity:** Low (isolated files, no API changes) --- ## Timeline & Effort Estimate ### Breakdown | Phase | Task | Effort | Dependencies | |-------|------|--------|-------------| | 1 | File structure refactoring | 30 min | None | | 2 | Unix implementation | 15 min | Phase 1 | | 3 | Windows implementation | 1 hour | Phase 1, research | | 4 | Main file refactor | 15 min | Phase 2, 3 | | 5 | Dependency management | 10 min | None | | 6 | Unit tests (both platforms) | 1.5 hours | Phase 2, 3 | | 7 | Documentation | 45 min | Phase 4 | | 8 | Configuration updates | 15 min | Phase 6 | | **Total** | | **~4.5 hours** | | ### Milestones - ✅ **M1**: Unix implementation compiles (Phase 1-2) - ✅ **M2**: Windows implementation compiles (Phase 3) - ✅ **M3**: All platforms compile successfully (Phase 4-5) - ✅ **M4**: Tests pass on Unix (Phase 6) - ✅ **M5**: Tests pass on Windows (Phase 6) - ✅ **M6**: Documentation complete (Phase 7) - ✅ **M7**: Ready for merge (Phase 8) --- ## Success Criteria ### Functional Requirements - [ ] `GOOS=windows GOARCH=amd64 go build` succeeds without errors - [ ] `GetAvailableSpace()` returns accurate values on Windows - [ ] Existing Unix behavior unchanged (byte-for-byte identical) - [ ] All existing tests pass without modification - [ ] New platform-specific tests added and passing ### Non-Functional Requirements - [ ] Zero runtime performance overhead (compile-time selection) - [ ] No new external dependencies (uses existing `golang.org/x/sys`) - [ ] Codecov shows >85% coverage for new files - [ ] GoReleaser nightly builds include Windows binaries - [ ] Documentation updated for platform-specific code patterns ### Quality Gates - [ ] No gosec findings on new code - [ ] staticcheck passes on all platforms - [ ] golangci-lint passes - [ ] No breaking API changes - [ ] Windows binary size < 50MB (similar to Linux) --- ## Known Limitations & Platform-Specific Behavior ### Disk Quotas **Windows:** - `GetDiskFreeSpaceEx` respects user disk quotas configured via NTFS - `freeBytesAvailable` reflects quota-limited space (correct behavior) - If user has 10GB quota on 100GB volume with 50GB free, returns ~10GB **Unix:** - `syscall.Statfs` returns filesystem-level statistics - Does NOT account for user quotas set via `quota`, `edquota`, or XFS project quotas - Returns physical available space regardless of quota limits - **Recommendation**: For quota-aware backups on Unix, implement separate quota checking via `quotactl()` syscall (future enhancement) ### Mount Points and Virtual Filesystems **Both Platforms:** - Query operates on the filesystem containing the path, not the path's parent - If backup dir is `/mnt/backup` on separate mount, returns that mount's space - Virtual filesystems (tmpfs, ramfs, procfs) return valid stats but may not reflect persistent storage **Unix Specific:** - `/proc`, `/sys`, `/dev` return non-zero space (virtual filesystems) - Network mounts (NFS, CIFS) return remote filesystem stats (may be stale) - Bind mounts resolve to underlying filesystem **Windows Specific:** - UNC paths (`\\server\share`) supported but require network access - Mounted volumes (NTFS junctions, symbolic links) follow to target - Drive letters always resolve to root of volume ### Symlink Behavior **Unix:** - `syscall.Statfs` **follows symlinks** to target directory - If `/backup` → `/mnt/external/backup`, queries `/mnt/external` filesystem - Broken symlinks return error ("no such file or directory") **Windows:** - `GetDiskFreeSpaceEx` **follows junction points and symbolic links** - Reparse points (directory symlinks) resolve to target volume - Hard links not applicable to directories (Windows limitation) ### Path Length Limits **Unix:** - No practical path length limit on modern systems (Linux: 4096 bytes, macOS: 1024 bytes) - Individual filename component limit: 255 bytes **Windows:** - **Legacy applications**: MAX_PATH = 260 characters (including drive and null terminator) - **Long path support**: Up to 32,767 characters with `\\?\` prefix (handled automatically in our implementation) - **Registry requirement**: `Computer\HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\FileSystem\LongPathsEnabled` = 1 (Windows 10 1607+) - **Limitation**: Some third-party backup tools may not support long paths ### Error Handling Edge Cases **Permission Denied:** - Unix: Returns `syscall.EACCES` wrapped in error - Windows: Returns `syscall.ERROR_ACCESS_DENIED` wrapped in error - **Behavior**: Backup creation should fail gracefully with clear error message **Path Does Not Exist:** - Unix: Returns `syscall.ENOENT` - Windows: Returns `syscall.ERROR_FILE_NOT_FOUND` or `ERROR_PATH_NOT_FOUND` - **Behavior**: Create parent directories before calling space check **Network Timeouts:** - Both platforms: Network filesystem queries can hang indefinitely - **Mitigation**: Document that network paths may cause slow backup starts - **Future**: Add timeout context to space check calls ### Overflow and Large Filesystems **Both Platforms:** - Cap return value at `math.MaxInt64` (9,223,372,036,854,775,807 bytes ≈ 8 exabytes) - Filesystems larger than 8EB report max value (edge case, unlikely until 2030s) - Block size calculation protected against multiplication overflow ### Concurrent Access **Both Platforms:** - Space check is a snapshot at query time, not transactional - Available space may decrease between check and backup write - **Mitigation**: Pre-flight check provides best-effort validation; backup write handles actual out-of-space errors --- ## Future Enhancements ### Out of Scope (This PR) 1. **UNC Path Support**: Full support for Windows network paths (`\\server\share`) - Current implementation supports basic UNC paths via Win32 API - Advanced scenarios (DFS, mapped drives) deferred 2. **Disk Quota Management**: Proactive quota warnings - Could add separate endpoint for quota information - Requires additional Win32 API calls 3. **Real-time Space Monitoring**: Filesystem watcher for space changes - Would require platform-specific event listeners - Significant scope expansion 4. **Cross-Platform Backup Restoration**: Handling Windows vs Unix path separators in archives - Archive format already uses forward slashes (zip standard) - No changes needed for basic compatibility ### Technical Debt **None identified.** This implementation: - Follows Go best practices for platform-specific code - Uses standard library and official `golang.org/x` extensions - Maintains backward compatibility - Adds no unnecessary complexity --- ## References ### Go Documentation - [Build Constraints](https://pkg.go.dev/cmd/go#hdr-Build_constraints) - [syscall package](https://pkg.go.dev/syscall) - [golang.org/x/sys/windows](https://pkg.go.dev/golang.org/x/sys/windows) ### Windows API - [GetDiskFreeSpaceExW](https://learn.microsoft.com/en-us/windows/win32/api/fileapi/nf-fileapi-getdiskfreespaceexw) - [File Management Functions](https://learn.microsoft.com/en-us/windows/win32/fileio/file-management-functions) ### Similar Implementations - Go stdlib: `os.Stat()` uses build tags for platform-specific `Sys()` implementation - Docker: Uses `golang.org/x/sys` for platform-specific volume operations - Prometheus: Platform-specific collectors via build tags ### Project Files - GoReleaser config: `.goreleaser.yaml` (lines 23-35) - Nightly CI: `.github/workflows/nightly-build.yml` (lines 268-285) - Backend go.mod: `backend/go.mod` (line 95: `golang.org/x/sys v0.40.0`) --- ## Appendix: Build Tag Examples in Codebase **Current Usage** (from analysis): - `backend/integration/*_test.go` - Use `//go:build integration` for integration tests - `backend/internal/api/handlers/security_handler_test_fixed.go` - Uses build tags **Pattern Established:** Build tags are already in use for test isolation. This PR extends the pattern to platform-specific production code. --- ## Implementation Order **Recommended Sequence:** 1. Create `backup_service_disk_unix.go` (copy existing logic) 2. Test Unix compilation: `GOOS=linux go build` 3. Create `backup_service_disk_windows.go` (new implementation) 4. Test Windows compilation: `GOOS=windows go build` 5. Refactor `backup_service.go` to delegate 6. Add unit tests for both platforms 7. Update documentation 8. Verify GoReleaser builds all targets **Critical Path:** Phase 3 (Windows implementation) is the longest and most complex. Start research on Win32 API early. --- **Plan Version**: 1.1 **Created**: 2026-01-30 **Updated**: 2026-01-30 **Author**: Planning Agent **Status**: Ready for Implementation --- ## Plan Revision History ### v1.1 (2026-01-30) - ✅ Added Windows long path support with `\\?\` prefix for paths > 260 characters - ✅ Removed unused `syscall` and `unsafe` imports from Windows implementation - ✅ Added missing test cases: long paths, Unicode paths, permission denied, symlinks - ✅ Added detailed CI/CD matrix configuration with actual workflow YAML - ✅ Documented limitations: quotas, mount points, symlinks, path lengths - ✅ Enhanced error messages with path context in all error returns - ✅ Removed out-of-scope sections: GoReleaser v2 migration, SQLite driver changes (separate issue) ### v1.0 (2026-01-30) - Initial plan for cross-platform disk space check implementation --- ## Out of Scope The following items are explicitly excluded from this implementation plan and may be addressed in separate issues: ### 1. GoReleaser v1 → v2 Migration - **Rationale**: Cross-platform disk space check is independent of release tooling - **Status**: Tracked in separate issue for GoReleaser configuration updates - **Priority**: Can be addressed after disk space check implementation ### 2. SQLite Driver Migration - **Rationale**: Database driver choice is independent of disk space queries - **Status**: Current CGO-based SQLite driver works for all platforms - **Priority**: Performance optimization, not a blocking issue for Windows compilation ### 3. Nightly Build CI/CD Issues - **Rationale**: CI/CD pipeline fixes are separate from source code changes - **Status**: Tracked in separate workflow configuration issues - **Priority**: Can be addressed in parallel or after implementation