{
  "id": "filesystem_operations",
  "label": "Filesystem Operations Canonical",
  "phase": "phase-09",
  "category": "operational_flows",
  "status": "ACTIVE_DH_MIRROR",
  "purpose": "Govern disk mutation as a controlled operational act inside DEVON-DEV.",
  "function": "Define how DEVON-DEV reads, writes, replaces, backs up and restores files without trusting path memory, terminal habit or accidental append.",
  "technology_requirements": [
    {
      "technology": "Filesystem Operation Controller",
      "required_for": "Govern disk mutation as a controlled operational act inside DEVON-DEV.",
      "required_by_phase": "phase-09",
      "required_by_category": "filesystem_operations",
      "required_by_buckets": [
        "Prerequisites",
        "Installation",
        "Configuration",
        "Validation",
        "Observable Evidence",
        "Failure Modes & Recovery",
        "Completion & Promotion"
      ],
      "expected_version": "MISSING until Filesystem Operation Controller is implemented and validated in the future Execution & Monitoring Panel",
      "validation_command": "MISSING until filesystem_operations can prove scope, evidence, execution state and promotion decision",
      "evidence_path": "/home/yeff/public_html/devon/canon/execution/state/dh_sources/filesystem_operations.json",
      "status_source": "Documentation Hub + future Execution & Monitoring Panel",
      "blocking_if_missing": true,
      "failure_impact": "A filesystem violation does not announce itself as architecture failure; it shows up later as a patch that touched the wrong file, a backup that restores the wrong state, or a branch that appears twice with competing truth. This card exists to make disk mutation boring, narrow and reversible."
    }
  ],
  "depends_on": [
    "tool_execution",
    "backup_rollback",
    "observable_evidence"
  ],
  "used_by": [
    "diff_patch_replace_engine",
    "simulation_dry_run_engine",
    "production_deployment_gate"
  ],
  "overview": {
    "summary": "Filesystem Operations Canonical owns the physical boundary where DEVON-DEV stops describing change and starts touching files. Its authority is not generic file access; it is the discipline that prevents the assistant, the future panel or any patch routine from treating the server filesystem as a scratchpad.",
    "function": "FUNCTION: Bind every file operation to a real path, canonical target, backup state, mutation type, expected delta, validation output and rollback route before the operation can be considered legitimate.",
    "system_position": "Inside Phase 09, this category is the substrate below patching, shell execution, dry-runs, migrations and rollback. Diff / Patch / Replace Engine depends on it to avoid writing into the wrong branch. Backup & Rollback depends on it to prove restoration. Terminal Output Panel can report a command, but this category proves what the command was allowed to touch.",
    "failure_impact": "A filesystem violation does not announce itself as architecture failure; it shows up later as a patch that touched the wrong file, a backup that restores the wrong state, or a branch that appears twice with competing truth. This card exists to make disk mutation boring, narrow and reversible."
  },
  "failure_impact": "A filesystem violation does not announce itself as architecture failure; it shows up later as a patch that touched the wrong file, a backup that restores the wrong state, or a branch that appears twice with competing truth. This card exists to make disk mutation boring, narrow and reversible."
}