diff --git a/specs/093-scope-001-workspace-id-isolation/checklists/requirements.md b/specs/093-scope-001-workspace-id-isolation/checklists/requirements.md
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+# Specification Quality Checklist: SCOPE-001 Workspace ID Isolation
+
+**Purpose**: Validate specification completeness and quality before proceeding to planning
+**Created**: 2026-02-14
+**Feature**: ./spec.md
+
+## Content Quality
+
+- [x] No implementation details (languages, frameworks, APIs)
+- [x] Focused on user value and business needs
+- [x] Written for non-technical stakeholders
+- [x] All mandatory sections completed
+
+## Requirement Completeness
+
+- [x] No [NEEDS CLARIFICATION] markers remain
+- [x] Requirements are testable and unambiguous
+- [x] Success criteria are measurable
+- [x] Success criteria are technology-agnostic (no implementation details)
+- [x] All acceptance scenarios are defined
+- [x] Edge cases are identified
+- [x] Scope is clearly bounded
+- [x] Dependencies and assumptions identified
+
+## Feature Readiness
+
+- [x] All functional requirements have clear acceptance criteria
+- [x] User scenarios cover primary flows
+- [x] Feature meets measurable outcomes defined in Success Criteria
+- [x] No implementation details leak into specification
+
+## Notes
+
+- All checklist items pass; spec is ready for `/speckit.plan`.
diff --git a/specs/093-scope-001-workspace-id-isolation/contracts/cli.md b/specs/093-scope-001-workspace-id-isolation/contracts/cli.md
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+# CLI Contract — 093 Workspace ID Backfill
+
+This feature adds an operator-only Artisan command to backfill missing `workspace_id` on tenant-owned tables.
+
+## Command
+
+- Name (proposed): `tenantpilot:backfill-workspace-ids`
+
+## Flags / Options (proposed)
+
+- `--dry-run` (default: false)
+  - Prints counts per table and exits without writing.
+- `--table=<name>` (optional)
+  - Restrict execution to a single table.
+- `--batch-size=<n>` (default: 5_000)
+  - Batch size for updates (where chunking is used).
+- `--resume-from=<cursor>` (optional)
+  - Resume from a saved cursor/checkpoint (implementation-defined).
+- `--max-rows=<n>` (optional)
+  - Safety valve for partial runs.
+
+## Safety + Observability
+
+Execution strategy (queued):
+
+- The command is a start surface only: authorize → acquire lock → create/reuse `OperationRun` → dispatch queued jobs → print a “View run” pointer.
+- The backfill mutations MUST execute inside queued jobs (batch/table scoped) to support large datasets.
+
+Safety + observability requirements:
+
+- Must acquire a lock (cache/DB-backed lock) to prevent concurrent runs.
+- Must create/reuse an `OperationRun` for visibility and progress tracking.
+- Must write an `AuditLog` entry for start and end (outcome, counts, duration).
+- Must abort and report when a tenant→workspace mapping cannot be resolved.
+
+## Output
+
+- Printed “Run started” summary:
+  - `OperationRun` identifier (or URL/route reference when available)
+  - jobs dispatched count
+  - selected tables / scope
+
+- Per-table totals:
+  - scanned rows
+  - rows missing `workspace_id`
+  - rows updated
+- Final summary + recommended validation SQL.
+
diff --git a/specs/093-scope-001-workspace-id-isolation/contracts/openapi.yaml b/specs/093-scope-001-workspace-id-isolation/contracts/openapi.yaml
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+openapi: 3.0.3
+info:
+  title: TenantPilot — Spec 093 Contracts
+  version: 1.0.0
+  description: |
+    Spec 093 introduces no new HTTP routes.
+
+    This OpenAPI file is intentionally minimal to document that the rollout
+    is implemented via database migrations + an operator-only Artisan command.
+paths: {}
diff --git a/specs/093-scope-001-workspace-id-isolation/data-model.md b/specs/093-scope-001-workspace-id-isolation/data-model.md
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+# Data Model — 093 SCOPE-001 Workspace ID Isolation
+
+## Core Entities
+
+### Workspace
+- `workspaces`:
+  - `id` (bigint)
+  - `name`, `slug`, timestamps
+
+### Tenant
+- `tenants`:
+  - `id` (bigint)
+  - `workspace_id` (bigint, intended non-null logically; currently nullable in schema)
+
+**Ownership rule**: A tenant belongs to exactly one workspace; this mapping is the source of truth for deriving workspace bindings.
+
+## Tenant-owned Tables (must become workspace-bound)
+
+For each table below:
+- Add `workspace_id` (bigint FK to `workspaces.id`)
+- Enforce `workspace_id` derived from tenant (DB-level composite FK on Postgres/MySQL)
+- Keep `tenant_id` immutable (application enforcement)
+
+### policies
+- Existing: `tenant_id`, `external_id`, `policy_type`, etc.
+- Add: `workspace_id`
+
+### policy_versions
+- Existing: `tenant_id`, `policy_id`, `snapshot`, etc.
+- Add: `workspace_id`
+
+### backup_sets
+- Existing: `tenant_id`, status/count, etc.
+- Add: `workspace_id`
+
+### backup_items
+- Existing: `tenant_id`, `backup_set_id`, `payload`, etc.
+- Add: `workspace_id`
+
+### restore_runs
+- Existing: `tenant_id`, `backup_set_id`, status, preview/results, etc.
+- Add: `workspace_id`
+
+### backup_schedules
+- Existing: `tenant_id`, enabled/frequency/schedule fields
+- Add: `workspace_id`
+
+### inventory_items
+- Existing: `tenant_id`, policy identifiers, `meta_jsonb`, last_seen fields
+- Add: `workspace_id`
+
+### inventory_links
+- Existing: `tenant_id`, source/target relationship identifiers
+- Add: `workspace_id`
+
+### entra_groups
+- Existing: `tenant_id`, entra_id, display fields
+- Add: `workspace_id`
+
+### findings
+- Existing: `tenant_id`, fingerprint, status/severity, run references
+- Add: `workspace_id`
+
+### entra_role_definitions
+- Existing: `tenant_id`, entra_id, display fields
+- Add: `workspace_id`
+
+### tenant_permissions
+- Existing: `tenant_id`, permission_key, status
+- Add: `workspace_id`
+
+## Audit Logs (scope invariants)
+
+### audit_logs
+- Existing: `tenant_id` nullable, `workspace_id` nullable, action/resource fields
+
+**Invariant**:
+- Tenant-scoped audit entry: `tenant_id != null` implies `workspace_id != null`.
+- Workspace-only audit entry: `workspace_id != null` and `tenant_id == null` is allowed.
+- Platform-only audit entry: both null is allowed.
+
+## Relationship + Constraint Strategy
+
+### Tenant-owned enforcement (Postgres/MySQL)
+- Composite FK on each tenant-owned table:
+  - `(tenant_id, workspace_id) → tenants(id, workspace_id)`
+- Standard FK on `workspace_id → workspaces.id`
+
+### SQLite
+- Foreign key / composite constraint enforcement is limited.
+- Testing relies on application enforcement + basic NOT NULL where feasible.
+
diff --git a/specs/093-scope-001-workspace-id-isolation/plan.md b/specs/093-scope-001-workspace-id-isolation/plan.md
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+# Implementation Plan: Spec 093 — SCOPE-001 Workspace ID Isolation
+
+**Branch**: `093-scope-001-workspace-id-isolation` | **Date**: 2026-02-14  
+**Spec**: `specs/093-scope-001-workspace-id-isolation/spec.md`  
+**Spec (absolute)**: `/Users/ahmeddarrazi/Documents/projects/TenantAtlas/specs/093-scope-001-workspace-id-isolation/spec.md`  
+**Input**: `/Users/ahmeddarrazi/Documents/projects/TenantAtlas/specs/093-scope-001-workspace-id-isolation/spec.md`
+
+## Summary
+
+Enforce DB-level workspace isolation for tenant-owned data by adding `workspace_id` to 12 tenant-owned tables, safely backfilling legacy rows, and then enforcing NOT NULL + referential integrity.
+
+Additionally, fix the audit trail invariant: if an `audit_logs` entry references a tenant, it must also reference a workspace.
+
+Rollout is staged to avoid downtime:
+1) Add nullable `workspace_id` columns.
+2) Enforce write-path derivation + mismatch rejection.
+3) Backfill in batches with resumability, locking, and observability (`OperationRun` + `AuditLog`).
+4) Enforce constraints and add final indexes.
+
+## Technical Context
+
+**Language/Version**: PHP 8.4 (Laravel 12)  
+**Primary Dependencies**: Filament v5, Livewire v4, Laravel Sail, Tailwind CSS v4  
+**Storage**: PostgreSQL (primary), with SQLite support patterns used in migrations for tests/CI  
+**Testing**: Pest v4 (`vendor/bin/sail artisan test --compact`)  
+**Target Platform**: Web (admin SaaS)  
+**Project Type**: Laravel monolith (Filament panels + Livewire + Artisan commands)  
+**Performance Goals**:
+- Backfill updates run in batches to avoid long locks.
+- Postgres uses `CONCURRENTLY` for large index creation where applicable.
+**Constraints**:
+- No new HTTP routes/pages.
+- No planned downtime; staged rollout.
+- Backfill is idempotent, resumable, and aborts on tenant→workspace mapping failures.
+**Scale/Scope**: Potentially large datasets (unknown upper bound); plan assumes millions of rows are possible across inventory/backup/history tables.
+
+## Constitution Check
+
+*GATE: Must pass before Phase 0 research. Re-check after Phase 1 design.*
+
+- Inventory-first / snapshots: PASS (schema-only + backfill; no changes to inventory/snapshot semantics).
+- Read/write separation: PASS (writes are limited to migrations + operator backfill; no UI “write surfaces” are added).
+- Graph contract path: PASS (no Graph calls).
+- Deterministic capabilities: PASS (no capability resolver changes).
+- Workspace isolation: PASS (strengthens isolation by enforcing workspace binding at the data layer).
+- Tenant isolation: PASS (tenant-owned tables remain tenant-scoped; DB constraints prevent cross-workspace mismatches).
+- RBAC-UX / planes: PASS (no changes to `/admin` vs `/system`; no new access surfaces).
+- Run observability: PASS (backfill is operationally relevant and will be tracked via `OperationRun` + `AuditLog`).
+- Filament Action Surface Contract: N/A (no Filament Resource/Page changes).
+
+## Project Structure
+
+### Documentation (this feature)
+
+```text
+specs/093-scope-001-workspace-id-isolation/
+├── plan.md
+├── research.md
+├── data-model.md
+├── quickstart.md
+├── contracts/
+│   ├── openapi.yaml
+│   └── cli.md
+└── tasks.md
+```
+
+### Source Code (repository root)
+
+```text
+app/
+├── Console/
+│   └── Commands/
+├── Models/
+└── Support/ (or Services/)
+
+database/
+└── migrations/
+
+tests/
+└── Feature/
+```
+
+**Structure Decision**: Implement as Laravel migrations + an Artisan operator command + model-level enforcement helpers, with Pest feature tests.
+
+## Phase Plan
+
+### Phase 0 — Research (complete)
+
+Outputs:
+- `specs/093-scope-001-workspace-id-isolation/research.md`
+
+Key decisions captured:
+- Tenant↔workspace consistency will be enforced with composite FKs on Postgres/MySQL.
+- Audit invariant enforced with a check constraint.
+
+### Phase 1 — Design & Contracts (complete)
+
+Outputs:
+- `specs/093-scope-001-workspace-id-isolation/data-model.md`
+- `specs/093-scope-001-workspace-id-isolation/contracts/openapi.yaml` (no new routes)
+- `specs/093-scope-001-workspace-id-isolation/contracts/cli.md` (Artisan backfill contract)
+- `specs/093-scope-001-workspace-id-isolation/quickstart.md`
+
+**Post-design constitution re-check**: PASS (no new external calls; operational backfill is observable).
+
+### Phase 2 — Implementation Planning (next)
+
+Implementation will be delivered as small, test-driven slices aligned to the staged rollout.
+
+1) Phase 1 migrations — add nullable `workspace_id`
+  - Add `workspace_id` (nullable) + index to the 12 tenant-owned tables.
+  - Add baseline scoping indexes for expected query patterns (at minimum `workspace_id` and `(workspace_id, tenant_id)` where useful).
+  - Ensure migrations follow existing multi-driver patterns (SQLite fallbacks where needed).
+
+2) Phase 1.5 — write-path enforcement (application)
+  - For each affected model/write path:
+    - On create: derive `workspace_id` from `tenant.workspace_id`.
+    - On update: reject changes to `tenant_id` (immutability) and reject explicit workspace mismatches.
+  - Ensure audit log writer sets `workspace_id` when `tenant_id` is present.
+
+3) Phase 2 — backfill command (operator-only)
+  - Add `tenantpilot:backfill-workspace-ids` (name TBD).
+  - Safety requirements:
+    - Acquire lock to prevent concurrent execution.
+    - Batch updates per table and allow resume/checkpoint.
+    - Abort and report table + sample IDs if a tenant→workspace mapping cannot be resolved.
+  - Observability:
+    - Create/reuse an `OperationRun` describing the backfill run.
+    - Write `AuditLog` summary entries for start/end/outcome.
+
+  - Execution strategy (queued):
+    - The command MUST be a lightweight start surface: authorize → acquire lock → create/reuse OperationRun → dispatch queued jobs → print a “View run” pointer.
+    - The actual backfill mutations MUST execute inside queued jobs (batch/table scoped) so large datasets do not require a single long-running synchronous CLI process.
+    - Jobs MUST update OperationRun progress/counters and record failures with stable reason codes + sanitized messages.
+
+4) Phase 3 — constraints + validation + final indexes
+  - Tenant-owned tables:
+    - Set `workspace_id` to NOT NULL (after validation).
+    - Add FK `workspace_id → workspaces.id`.
+    - Add composite FK `(tenant_id, workspace_id) → tenants(id, workspace_id)` on Postgres/MySQL.
+    - For Postgres, prefer `NOT VALID` then `VALIDATE CONSTRAINT` to reduce lock time.
+  - Tenants:
+    - Add a unique constraint/index on `(id, workspace_id)` to support composite FKs.
+  - Audit logs:
+    - Backfill `workspace_id` for rows where `tenant_id` is present.
+    - Add check constraint: `tenant_id IS NULL OR workspace_id IS NOT NULL`.
+  - Index strategy:
+    - Use `CREATE INDEX CONCURRENTLY` on Postgres for large tables (migrations must not run in a transaction).
+
+5) Pest tests (minimal, high-signal)
+  - Backfill correctness on a representative table (seed missing `workspace_id`, run backfill, assert set).
+  - DB constraint tests (where supported by test DB):
+    - `tenant_id` + mismatched `workspace_id` cannot be persisted after Phase 3 constraints.
+    - audit invariant: tenant-scoped audit requires workspace; workspace-only and platform-only are allowed.
+
diff --git a/specs/093-scope-001-workspace-id-isolation/quickstart.md b/specs/093-scope-001-workspace-id-isolation/quickstart.md
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+# Quickstart — 093 Workspace ID Isolation
+
+## Goal
+
+Run the staged rollout locally/staging to ensure all tenant-owned tables are workspace-bound and audit invariants hold.
+
+## Prereqs
+
+- Sail is running: `vendor/bin/sail up -d`
+- DB is migrated: `vendor/bin/sail artisan migrate`
+
+## Rollout Order
+
+1) **Phase 1** — Add nullable `workspace_id` columns + indexes
+- Deploy migrations
+
+2) **Phase 1.5** — Deploy app write-path enforcement
+- New/updated tenant-owned writes derive `workspace_id` from `tenant.workspace_id`
+- Mismatches are rejected
+
+3) **Phase 2** — Backfill existing rows
+- Dry-run:
+  - `vendor/bin/sail artisan tenantpilot:backfill-workspace-ids --dry-run`
+- Execute:
+  - `vendor/bin/sail artisan tenantpilot:backfill-workspace-ids`
+
+4) **Phase 3** — Enforce constraints + validate + final indexes
+- Apply NOT NULL + FKs + composite FKs
+- Add audit_logs check constraint
+
+## Validation SQL (Postgres)
+
+Run these to confirm no missing bindings remain.
+
+Tenant-owned tables:
+- `SELECT count(*) FROM policies WHERE workspace_id IS NULL;`
+- `SELECT count(*) FROM policy_versions WHERE workspace_id IS NULL;`
+- `SELECT count(*) FROM backup_sets WHERE workspace_id IS NULL;`
+- `SELECT count(*) FROM backup_items WHERE workspace_id IS NULL;`
+- `SELECT count(*) FROM restore_runs WHERE workspace_id IS NULL;`
+- `SELECT count(*) FROM backup_schedules WHERE workspace_id IS NULL;`
+- `SELECT count(*) FROM inventory_items WHERE workspace_id IS NULL;`
+- `SELECT count(*) FROM inventory_links WHERE workspace_id IS NULL;`
+- `SELECT count(*) FROM entra_groups WHERE workspace_id IS NULL;`
+- `SELECT count(*) FROM findings WHERE workspace_id IS NULL;`
+- `SELECT count(*) FROM entra_role_definitions WHERE workspace_id IS NULL;`
+- `SELECT count(*) FROM tenant_permissions WHERE workspace_id IS NULL;`
+
+Audit invariant:
+- `SELECT count(*) FROM audit_logs WHERE tenant_id IS NOT NULL AND workspace_id IS NULL;`
+
+## Rollback notes
+
+- Phase 1 migrations are reversible (drop columns / indexes) but may be large operations on production datasets.
+- Prefer forward-fix for production if Phase 2/3 is partially applied.
+
diff --git a/specs/093-scope-001-workspace-id-isolation/research.md b/specs/093-scope-001-workspace-id-isolation/research.md
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+# Research — 093 SCOPE-001 Workspace ID Isolation
+
+**Date**: 2026-02-14  
+**Branch**: `093-scope-001-workspace-id-isolation`
+
+## Current State (repo evidence)
+
+### Workspace/Tenant relationship
+- `workspaces.id` is a Laravel `$table->id()` (bigint).
+- `tenants.workspace_id` exists and is nullable with an index; constraints are applied for non-sqlite drivers.
+
+### Tenant-owned tables (target scope)
+The 12 tenant-owned tables currently have `tenant_id` and do **not** have `workspace_id`:
+- `policies` (created 2025_12_10_000110)
+- `policy_versions` (created 2025_12_10_000120)
+- `backup_sets` (created 2025_12_10_000130)
+- `backup_items` (created 2025_12_10_000140)
+- `restore_runs` (created 2025_12_10_000150)
+- `backup_schedules` (created 2026_01_05_011014)
+- `inventory_items` (created 2026_01_07_142720)
+- `inventory_links` (created 2026_01_07_150000)
+- `entra_groups` (created 2026_01_11_120003)
+- `findings` (created 2026_01_13_223311)
+- `entra_role_definitions` (created 2026_02_10_133238)
+- `tenant_permissions` (created 2025_12_11_122423)
+
+### Audit logs
+- `audit_logs.tenant_id` is nullable.
+- `audit_logs.workspace_id` exists and is nullable.
+- There is **no** DB-level invariant today preventing `tenant_id != null` with `workspace_id == null`.
+
+### Migration patterns already used in the repo
+- Multi-driver migrations (`pgsql`, `mysql`, `sqlite`) exist.
+- SQLite rebuild migrations are used when needed (rename old table, recreate, chunk copy).
+- Postgres/MySQL NOT NULL enforcement is sometimes done with `DB::statement(...)`.
+- Partial unique indexes are used via `DB::statement(...)`.
+
+## Decisions
+
+### Decision 1 — How to enforce tenant↔workspace consistency
+**Decision**: Use a composite FK for tenant-owned tables on Postgres/MySQL: `(tenant_id, workspace_id)` references `tenants(id, workspace_id)`.
+
+**Rationale**:
+- Two independent FKs (`tenant_id → tenants.id` and `workspace_id → workspaces.id`) do not prevent mismatches.
+- A composite FK makes the “workspace derived from tenant” rule enforceable at the DB level, aligning with SCOPE-001’s intent.
+
+**Alternatives considered**:
+- App-only validation (insufficient for DB-level isolation goals).
+- Triggers (more complex to deploy/test, harder to reason about).
+- Postgres RLS (high operational cost; broad scope).
+
+**Notes/requirements implied**:
+- Add a unique constraint/index on `tenants (id, workspace_id)` (likely with `workspace_id IS NOT NULL`).
+- For SQLite: skip composite FK enforcement (SQLite limitations) while keeping tests green; rely on application enforcement during tests.
+
+### Decision 2 — Staged rollout
+**Decision**: Follow the spec’s 4-phase rollout:
+1) Add `workspace_id` nullable columns + indexes.
+2) Enforce write-path assignment + mismatch rejection in the app.
+3) Backfill missing `workspace_id` via an operator command (idempotent, resumable, locked).
+4) Enforce constraints + validate + add final indexes.
+
+**Rationale**: Avoid downtime and allow safe production backfill.
+
+### Decision 3 — Audit log invariant
+**Decision**: Add a DB check constraint on `audit_logs`:
+- `tenant_id IS NULL OR workspace_id IS NOT NULL`
+
+**Rationale**: Directly enforces FR-008 while preserving workspace-only and platform-only events.
+
+**Alternative considered**:
+- Enforce in application only (not sufficient for invariants).
+
+### Decision 4 — Backfill observability
+**Decision**: The backfill command creates/reuses an `OperationRun` and writes `AuditLog` entries for start/end/outcome.
+
+**Rationale**: Matches FR-012 and the constitution’s observability rules for operationally relevant actions.
+
+## Open Questions (resolved by spec clarifications)
+- Mismatch handling: reject writes when tenant/workspace mismatch is provided.
+- Invalid mapping during backfill: abort and report.
+- Tenant immutability: reject tenant_id updates.
+- Query/view refactors: out of scope.
+
diff --git a/specs/093-scope-001-workspace-id-isolation/spec.md b/specs/093-scope-001-workspace-id-isolation/spec.md
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+#+#+#+#+markdown
+# Feature Specification: SCOPE-001 Workspace ID Isolation
+
+**Feature Branch**: `093-scope-001-workspace-id-isolation`  
+**Created**: 2026-02-14  
+**Status**: Draft  
+**Input**: Enforce workspace isolation by binding all tenant-owned records to a workspace, with a safe staged rollout and corrected audit invariants.
+
+## Spec Scope Fields *(mandatory)*
+
+- **Scope**: workspace
+- **Primary Routes**: No new pages/routes. Affects all create/write paths that persist tenant-owned records in the tables listed below, plus operational tooling for a one-time backfill.
+- **Data Ownership**:
+  - Tenant-owned tables impacted (must become explicitly workspace-bound):
+    - policies
+    - policy_versions
+    - backup_sets
+    - backup_items
+    - restore_runs
+    - backup_schedules
+    - inventory_items
+    - inventory_links
+    - entra_groups
+    - findings
+    - entra_role_definitions
+    - tenant_permissions
+  - Audit trail invariants impacted: audit_logs
+- **RBAC**: No user-facing permissions change. Backfill execution is an operator-only workflow (platform/ops).
+
+## Clarifications
+
+### Session 2026-02-14
+
+- Q: For the 12 tenant-owned tables, how strict should deterministic workspace binding be when a caller explicitly provides a workspace binding? → A: Reject any mismatch; if a record references a tenant, its workspace binding MUST equal the tenant’s workspace.
+- Q: During backfill, what should happen if a row’s tenant reference is invalid (tenant missing / cannot map tenant → workspace)? → A: Abort the backfill run and report the offending table plus sample identifiers for remediation.
+- Q: Should tenant_id be allowed to change on existing rows in the 12 tenant-owned tables? → A: No; tenant_id is immutable and updates are rejected.
+- Q: How should the backfill workflow be recorded for observability/audit? → A: Create/reuse an OperationRun for the backfill and also write an AuditLog summary for start/end/outcome.
+- Q: Should this feature include updating existing canonical/operational queries/views to scope by workspace binding? → A: No; query/view changes are out of scope for 093 (follow-up later).
+
+## User Scenarios & Testing *(mandatory)*
+
+### User Story 1 - Enforce workspace ownership at the data layer (Priority: P1)
+
+As a platform owner, I want every tenant-owned record to be explicitly bound to a workspace so that workspace isolation does not depend on application-only guardrails.
+
+**Why this priority**: This closes a class of potential cross-workspace data leakage and makes operational reporting safer and simpler.
+
+**Independent Test**: Can be tested by creating a tenant-owned record with a tenant reference and asserting that `workspace_id` is derived from the tenant and that any explicit mismatched `workspace_id` is rejected; backfill behavior is validated in User Story 2.
+
+**Acceptance Scenarios**:
+
+1. **Given** tenant-owned records exist without a workspace binding, **When** the staged rollout completes, **Then** all tenant-owned records are workspace-bound.
+2. **Given** the rollout is in progress, **When** the system is used normally, **Then** there is no required downtime for administrators.
+
+---
+
+### User Story 2 - Safely backfill existing production data (Priority: P2)
+
+As an operator, I want a safe, resumable way to backfill missing workspace bindings so that large datasets can be migrated without risky one-shot operations.
+
+**Why this priority**: Without a safe backfill, enforcing data-level constraints risks outages and operational incidents.
+
+**Independent Test**: Can be tested by seeding rows with missing workspace bindings, running the backfill workflow twice, and confirming idempotent outcomes.
+
+**Acceptance Scenarios**:
+
+1. **Given** a table contains rows missing workspace bindings, **When** the backfill is executed, **Then** those rows are updated to the correct workspace.
+2. **Given** the backfill is interrupted and restarted, **When** it runs again, **Then** it resumes safely without corrupting already-correct rows.
+
+---
+
+### User Story 3 - Make audit logs unambiguous across scopes (Priority: P3)
+
+As an auditor, I want tenant-scoped audit events to always be workspace-bound so that workspace isolation semantics are preserved in audit trails.
+
+**Why this priority**: Audit trails are only reliable if their scope is structurally consistent and queryable.
+
+**Independent Test**: Can be tested by attempting to store a tenant-scoped audit entry without a workspace binding and verifying it is rejected, while allowing workspace-only and platform-only entries.
+
+**Acceptance Scenarios**:
+
+1. **Given** an audit log entry references a tenant, **When** it is persisted, **Then** it must also reference a workspace.
+2. **Given** an audit log entry is workspace-only or platform-only, **When** it is persisted, **Then** it remains valid according to the documented rules.
+
+---
+
+### Edge Cases
+
+- Tenant-owned row references a tenant that no longer exists (or is otherwise invalid).
+- Backfill is executed concurrently (must not produce conflicting outcomes).
+- New rows are created while the backfill is in progress (must not reintroduce missing bindings).
+- Partial completion: some tables are fully backfilled while others are pending.
+- Mixed-scope audit events: tenant-scoped vs workspace-only vs platform-only.
+- Attempt to change tenant_id on an existing tenant-owned record.
+
+## Requirements *(mandatory)*
+
+**Constitution alignment (required):** If this feature introduces any Microsoft Graph calls, any write/change behavior,
+or any long-running/queued/scheduled work, the spec MUST describe contract registry updates, safety gates
+(preview/confirmation/audit), tenant isolation, run observability (`OperationRun` type/identity/visibility), and tests.
+If security-relevant DB-only actions intentionally skip `OperationRun`, the spec MUST describe `AuditLog` entries.
+
+**Constitution alignment (RBAC-UX):** If this feature introduces or changes authorization behavior, the spec MUST:
+- state which authorization plane(s) are involved (tenant/admin `/admin` + tenant-context `/admin/t/{tenant}/...` vs platform `/system`),
+- ensure any cross-plane access is deny-as-not-found (404),
+- explicitly define 404 vs 403 semantics:
+  - non-member / not entitled to workspace scope OR tenant scope → 404 (deny-as-not-found)
+  - member but missing capability → 403
+- describe how authorization is enforced server-side (Gates/Policies) for every mutation/operation-start/credential change,
+- reference the canonical capability registry (no raw capability strings; no role-string checks in feature code),
+- ensure global search is tenant-scoped and non-member-safe (no hints; inaccessible results treated as 404 semantics),
+- ensure destructive-like actions require confirmation (`->requiresConfirmation()`),
+- include at least one positive and one negative authorization test, and note any RBAC regression tests added/updated.
+
+**Constitution alignment (OPS-EX-AUTH-001):** OIDC/SAML login handshakes may perform synchronous outbound HTTP (e.g., token exchange)
+on `/auth/*` endpoints without an `OperationRun`. This MUST NOT be used for Monitoring/Operations pages.
+
+**Constitution alignment (BADGE-001):** If this feature changes status-like badges (status/outcome/severity/risk/availability/boolean),
+the spec MUST describe how badge semantics stay centralized (no ad-hoc mappings) and which tests cover any new/changed values.
+
+**Constitution alignment (Filament Action Surfaces):** If this feature adds or modifies any Filament Resource / RelationManager / Page,
+the spec MUST include a “UI Action Matrix” (see below) and explicitly state whether the Action Surface Contract is satisfied.
+If the contract is not satisfied, the spec MUST include an explicit exemption with rationale.
+
+### Functional Requirements
+
+- **FR-001 (Schema coverage)**: The system MUST represent a workspace binding for every tenant-owned record in the 12 listed tables.
+- **FR-002 (No missing bindings post-rollout)**: After completion of the rollout, the system MUST prevent creation or persistence of tenant-owned records without a workspace binding.
+- **FR-003 (Deterministic binding for new writes)**: For any new or updated tenant-owned record, the system MUST derive the workspace binding from the referenced tenant (not from user/session context alone).
+- **FR-003a (Mismatch handling)**: If a caller provides a workspace binding that does not match the referenced tenant’s workspace, the write MUST be rejected.
+- **FR-004 (Safe staged rollout)**: The system MUST support a staged rollout that allows introducing the new field, deploying write-path enforcement, backfilling existing data, and only then enforcing strict constraints.
+- **FR-005 (Idempotent backfill)**: Operators MUST be able to re-run the backfill safely; repeated runs MUST not regress already-correct data.
+- **FR-006 (Operational safety)**: The backfill workflow MUST be safe for large datasets (batching/resume) and MUST prevent concurrent executions.
+- **FR-006a (Invalid mapping handling)**: If the backfill workflow encounters a tenant-owned row that cannot be mapped from tenant → workspace, it MUST abort and report the offending table and sample identifiers for operator remediation.
+- **FR-007 (Validation)**: Operators MUST be able to validate that no tenant-owned records remain without a workspace binding before strict constraints are enforced.
+- **FR-011 (Tenant immutability)**: For tenant-owned records, tenant identity MUST be immutable after creation; attempts to change tenant_id MUST be rejected.
+- **FR-012 (Backfill observability and audit)**: The backfill workflow MUST be observable via an OperationRun (progress + outcome) and MUST write an audit log summary entry for start/end/outcome.
+- **FR-013 (Query/view scope)**: This feature MUST NOT require broad refactors of canonical/operational queries; it MUST focus on making workspace scoping structurally correct at the data layer.
+- **FR-008 (Audit log invariant)**: If an audit log entry references a tenant, it MUST also reference a workspace.
+- **FR-009 (Audit scope flexibility)**: The audit log MUST continue to support workspace-only events (workspace present, tenant absent) and platform-only events (both absent).
+- **FR-010 (Canonical view scoping readiness)**: After rollout, operational/canonical queries SHOULD be able to scope tenant-owned data by workspace without relying on implicit joins or assumptions.
+
+### Assumptions & Dependencies
+
+- Each tenant belongs to exactly one workspace, and that mapping is the source of truth for deriving workspace bindings.
+- The 12 listed tables are “tenant-owned” per SCOPE-001 and are expected to remain tenant-owned.
+- Any existing tooling that creates tenant-owned records has enough information to reference the tenant (directly or indirectly) at write time.
+
+### Key Entities *(include if feature involves data)*
+
+- **Workspace**: The top-level isolation boundary for data access and operations.
+- **Tenant**: A unit of configuration/data that is owned by exactly one workspace.
+- **Tenant-owned record**: Any record that must be both tenant-scoped and workspace-scoped.
+- **Audit event**: An immutable entry describing an action/event, which may be tenant-scoped, workspace-scoped, or platform-scoped.
+- **Backfill run**: A controlled operational execution that updates legacy data and reports progress/outcomes.
+
+## Success Criteria *(mandatory)*
+
+### Measurable Outcomes
+
+- **SC-001 (Completeness)**: 100% of records in the 12 tenant-owned tables have a workspace binding after backfill and validation.
+- **SC-002 (Integrity)**: After strict constraints are enabled, creating a tenant-owned record without a workspace binding is rejected.
+- **SC-003 (Audit correctness)**: 100% of tenant-scoped audit events include a workspace binding; workspace-only and platform-only audit events remain valid.
+- **SC-004 (Operational safety)**: The rollout requires no planned downtime for administrators.
+- **SC-005 (Repeatability)**: Re-running the backfill after completion does not change already-correct records and can be used as a safety check.
diff --git a/specs/093-scope-001-workspace-id-isolation/tasks.md b/specs/093-scope-001-workspace-id-isolation/tasks.md
new file mode 100644
index 0000000..8f1cf39
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+++ b/specs/093-scope-001-workspace-id-isolation/tasks.md
@@ -0,0 +1,210 @@
+# Tasks: 093 — SCOPE-001 Workspace ID Isolation
+
+**Input**: Design documents from `/specs/093-scope-001-workspace-id-isolation/`  
+**Prerequisites**: plan.md (required), spec.md (required for user stories), research.md, data-model.md, contracts/, quickstart.md  
+**Tests**: For runtime behavior changes in this repo, tests are REQUIRED (Pest). Only docs-only changes may omit tests.
+**Operations**: This feature introduces an operator command (long-running), so tasks include creating/reusing and updating a canonical `OperationRun` and creating `AuditLog` entries before/after.
+
+**Organization**: Tasks are grouped by user story to enable independent implementation and testing of each story.
+
+## Format: `[ID] [P?] [Story] Description`
+
+- **[P]**: Can run in parallel (different files, no dependencies)
+- **[Story]**: Which user story this task belongs to (e.g., US1, US2, US3)
+- Include file paths in descriptions
+
+## Path Conventions
+
+- Laravel app code: `app/`
+- Migrations: `database/migrations/`
+- Pest tests: `tests/Feature/`
+
+## Phase 1: Setup (Shared Infrastructure)
+
+**Purpose**: Confirm design inputs + existing code entrypoints
+
+- [ ] T001 Verify feature docs are present and consistent in specs/093-scope-001-workspace-id-isolation/{spec.md,plan.md,research.md,data-model.md,contracts/,quickstart.md,tasks.md}
+- [ ] T002 [P] Inventory target models exist for the 12 tables in app/Models/{Policy,PolicyVersion,BackupSet,BackupItem,RestoreRun,BackupSchedule,InventoryItem,InventoryLink,EntraGroup,Finding,EntraRoleDefinition,TenantPermission}.php
+- [ ] T003 [P] Identify audit logging entrypoints that must set workspace_id in app/Services/Intune/AuditLogger.php and app/Services/Audit/WorkspaceAuditLogger.php
+
+---
+
+## Phase 2: Foundational (Blocking Prerequisites)
+
+**Purpose**: Shared building blocks used across all stories
+
+**⚠️ CRITICAL**: No user story work can begin until this phase is complete
+
+- [ ] T004 Create shared model concern for workspace binding + tenant immutability in app/Support/Concerns/DerivesWorkspaceIdFromTenant.php
+- [ ] T005 [P] Add supporting exception type for mismatch/immutability errors in app/Support/WorkspaceIsolation/WorkspaceIsolationViolation.php
+- [ ] T006 Add a small list of tenant-owned table names for reuse (command + tests) in app/Support/WorkspaceIsolation/TenantOwnedTables.php
+
+**Checkpoint**: Foundation ready (shared enforcement building blocks exist)
+
+---
+
+## Phase 3: User Story 1 — Enforce workspace ownership at the data layer (Priority: P1) 🎯 MVP
+
+**Goal**: Every tenant-owned record becomes explicitly workspace-bound, and the system prevents new tenant-owned writes without a correct workspace binding.
+
+**Independent Test**:
+- Creating a tenant-owned record without workspace_id results in workspace_id being derived from tenant.
+- Creating/updating a tenant-owned record with a mismatched workspace_id is rejected.
+
+### Tests for User Story 1
+
+> NOTE: Write these tests first and ensure they fail before implementation.
+
+- [ ] T007 [P] [US1] Add unit-level enforcement tests for the shared concern in tests/Feature/WorkspaceIsolation/DerivesWorkspaceIdFromTenantTest.php
+- [ ] T007a [P] [US1] Add immutability test case (attempt to change tenant_id is rejected) in tests/Feature/WorkspaceIsolation/DerivesWorkspaceIdFromTenantTest.php
+
+### Implementation for User Story 1
+
+- [ ] T008 [P] [US1] Add nullable workspace_id + indexes to policies in database/migrations/*_add_workspace_id_to_policies_table.php
+- [ ] T009 [P] [US1] Add nullable workspace_id + indexes to policy_versions in database/migrations/*_add_workspace_id_to_policy_versions_table.php
+- [ ] T010 [P] [US1] Add nullable workspace_id + indexes to backup_sets in database/migrations/*_add_workspace_id_to_backup_sets_table.php
+- [ ] T011 [P] [US1] Add nullable workspace_id + indexes to backup_items in database/migrations/*_add_workspace_id_to_backup_items_table.php
+- [ ] T012 [P] [US1] Add nullable workspace_id + indexes to restore_runs in database/migrations/*_add_workspace_id_to_restore_runs_table.php
+- [ ] T013 [P] [US1] Add nullable workspace_id + indexes to backup_schedules in database/migrations/*_add_workspace_id_to_backup_schedules_table.php
+- [ ] T014 [P] [US1] Add nullable workspace_id + indexes to inventory_items in database/migrations/*_add_workspace_id_to_inventory_items_table.php
+- [ ] T015 [P] [US1] Add nullable workspace_id + indexes to inventory_links in database/migrations/*_add_workspace_id_to_inventory_links_table.php
+- [ ] T016 [P] [US1] Add nullable workspace_id + indexes to entra_groups in database/migrations/*_add_workspace_id_to_entra_groups_table.php
+- [ ] T017 [P] [US1] Add nullable workspace_id + indexes to findings in database/migrations/*_add_workspace_id_to_findings_table.php
+- [ ] T018 [P] [US1] Add nullable workspace_id + indexes to entra_role_definitions in database/migrations/*_add_workspace_id_to_entra_role_definitions_table.php
+- [ ] T019 [P] [US1] Add nullable workspace_id + indexes to tenant_permissions in database/migrations/*_add_workspace_id_to_tenant_permissions_table.php
+
+- [ ] T019a [US1] Enforce tenant_id immutability in app/Support/Concerns/DerivesWorkspaceIdFromTenant.php (reject updates when tenant_id differs from original)
+
+- [ ] T020 [P] [US1] Apply DerivesWorkspaceIdFromTenant concern to Policy model in app/Models/Policy.php
+- [ ] T021 [P] [US1] Apply DerivesWorkspaceIdFromTenant concern to PolicyVersion model in app/Models/PolicyVersion.php
+- [ ] T022 [P] [US1] Apply DerivesWorkspaceIdFromTenant concern to BackupSet model in app/Models/BackupSet.php
+- [ ] T023 [P] [US1] Apply DerivesWorkspaceIdFromTenant concern to BackupItem model in app/Models/BackupItem.php
+- [ ] T024 [P] [US1] Apply DerivesWorkspaceIdFromTenant concern to RestoreRun model in app/Models/RestoreRun.php
+- [ ] T025 [P] [US1] Apply DerivesWorkspaceIdFromTenant concern to BackupSchedule model in app/Models/BackupSchedule.php
+- [ ] T026 [P] [US1] Apply DerivesWorkspaceIdFromTenant concern to InventoryItem model in app/Models/InventoryItem.php
+- [ ] T027 [P] [US1] Apply DerivesWorkspaceIdFromTenant concern to InventoryLink model in app/Models/InventoryLink.php
+- [ ] T028 [P] [US1] Apply DerivesWorkspaceIdFromTenant concern to EntraGroup model in app/Models/EntraGroup.php
+- [ ] T029 [P] [US1] Apply DerivesWorkspaceIdFromTenant concern to Finding model in app/Models/Finding.php
+- [ ] T030 [P] [US1] Apply DerivesWorkspaceIdFromTenant concern to EntraRoleDefinition model in app/Models/EntraRoleDefinition.php
+- [ ] T031 [P] [US1] Apply DerivesWorkspaceIdFromTenant concern to TenantPermission model in app/Models/TenantPermission.php
+
+- [ ] T032 [US1] Add tenants composite uniqueness to support composite FK in database/migrations/*_add_tenants_id_workspace_id_unique.php
+
+**Post-backfill constraints (depends on US2 completion):**
+- [ ] T033 [US1] Enforce NOT NULL workspace_id for the 12 tenant-owned tables in database/migrations/*_enforce_workspace_id_not_null_on_tenant_owned_tables.php
+- [ ] T034 [US1] Add FK workspace_id → workspaces.id + composite FK (tenant_id, workspace_id) → tenants(id, workspace_id) for the 12 tables in database/migrations/*_add_workspace_isolation_constraints_to_tenant_owned_tables.php
+
+**Checkpoint**: US1 complete once new writes are safe and DB constraints are enforceable after backfill.
+
+---
+
+## Phase 4: User Story 2 — Safely backfill existing production data (Priority: P2)
+
+**Goal**: Operators can safely backfill missing workspace_id across all 12 tables without downtime.
+
+**Independent Test**:
+- With seeded rows missing workspace_id, running the command sets workspace_id correctly.
+- Re-running the command is idempotent.
+- If a tenant→workspace mapping cannot be resolved, the command aborts and reports.
+
+### Tests for User Story 2
+
+> NOTE: Write these tests first and ensure they fail before implementation.
+
+- [ ] T035 [P] [US2] Add backfill command tests in tests/Feature/WorkspaceIsolation/BackfillWorkspaceIdsCommandTest.php
+
+### Implementation for User Story 2
+
+- [ ] T036 [US2] Implement operator command skeleton + options in app/Console/Commands/TenantpilotBackfillWorkspaceIds.php
+- [ ] T036a [US2] Implement queued job runner for batch/table backfills in app/Jobs/BackfillWorkspaceIdsJob.php
+- [ ] T036b [US2] Dispatch jobs from app/Console/Commands/TenantpilotBackfillWorkspaceIds.php and ensure “start → dispatch → view run” flow
+- [ ] T037 [US2] Add concurrency lock (Cache::lock) to prevent concurrent backfills in app/Console/Commands/TenantpilotBackfillWorkspaceIds.php
+- [ ] T038 [US2] Implement dry-run counts + per-table reporting in app/Console/Commands/TenantpilotBackfillWorkspaceIds.php
+- [ ] T039 [US2] Implement per-workspace OperationRun creation in app/Console/Commands/TenantpilotBackfillWorkspaceIds.php using app/Services/OperationRunService.php (ensureWorkspaceRunWithIdentity)
+- [ ] T040 [US2] Write start/end/outcome AuditLog summaries per workspace in app/Console/Commands/TenantpilotBackfillWorkspaceIds.php using app/Services/Audit/WorkspaceAuditLogger.php
+- [ ] T041 [US2] Implement backfill updates for all 12 tables in app/Jobs/BackfillWorkspaceIdsJob.php (UPDATE ... FROM tenants WHERE workspace_id IS NULL)
+- [ ] T042 [US2] Implement abort-and-report behavior when tenant workspace_id is missing/unresolvable in app/Console/Commands/TenantpilotBackfillWorkspaceIds.php
+- [ ] T043 [US2] Implement progress tracking (counts + last processed id) persisted into OperationRun context from app/Jobs/BackfillWorkspaceIdsJob.php
+
+**Checkpoint**: US2 complete when backfill is safe to run repeatedly and produces OperationRun + AuditLog observability.
+
+---
+
+## Phase 5: User Story 3 — Make audit logs unambiguous across scopes (Priority: P3)
+
+**Goal**: If an audit log entry references a tenant, it must also reference a workspace.
+
+**Independent Test**:
+- Tenant-scoped audit logs always store workspace_id.
+- DB prevents tenant_id set with workspace_id null.
+- Workspace-only and platform-only logs remain allowed.
+
+### Tests for User Story 3
+
+> NOTE: Write these tests first and ensure they fail before implementation.
+
+- [ ] T044 [P] [US3] Add audit invariant tests for tenant/workspace/platform scopes in tests/Feature/WorkspaceIsolation/AuditLogScopeInvariantTest.php
+
+### Implementation for User Story 3
+
+- [ ] T045 [US3] Ensure tenant-scoped audit writes include workspace_id in app/Services/Intune/AuditLogger.php
+- [ ] T046 [US3] Add migration to backfill audit_logs.workspace_id where tenant_id is present (join tenants) in database/migrations/*_backfill_workspace_id_on_audit_logs.php
+- [ ] T047 [US3] Add check constraint enforcing tenant_id IS NULL OR workspace_id IS NOT NULL in database/migrations/*_add_audit_logs_scope_check_constraint.php
+
+**Checkpoint**: US3 complete when invariant is enforced in both app writes and DB.
+
+---
+
+## Phase 6: Polish & Cross-Cutting Concerns
+
+- [ ] T048 [P] Add validation SQL snippets for operators in specs/093-scope-001-workspace-id-isolation/quickstart.md
+- [ ] T049 Ensure tasks and rollout order remain accurate after implementation changes in specs/093-scope-001-workspace-id-isolation/plan.md
+
+---
+
+## Dependencies & Execution Order
+
+### Story order
+
+- Setup (Phase 1) → Foundational (Phase 2) → US1 (Phase 3) → US2 (Phase 4) → US1 constraints (T033–T034) → US3 (Phase 5) → Polish
+
+### Dependency graph (story-level)
+
+- US1 (nullable columns + app enforcement) → blocks US2 (backfill)
+- US2 (backfill) → blocks US1 constraints (T033–T034)
+- US3 can be started after Foundational, but DB check constraint should land after US2 backfill if historical audit_logs need repair first.
+
+---
+
+## Parallel execution examples
+
+### Parallel Example: US1
+
+- [P] T008–T019 can run in parallel (independent migrations per table)
+- [P] T020–T031 can run in parallel (independent model updates)
+
+### Parallel Example: US2
+
+- [P] T035 (tests) can be written while T036–T038 (command skeleton + reporting) are implemented
+
+### Parallel Example: US3
+
+- [P] T044 (tests) can be written while T045–T047 are implemented
+
+---
+
+## Implementation Strategy
+
+### MVP First (US1 only)
+
+1. Complete Phase 1 (Setup)
+2. Complete Phase 2 (Foundational)
+3. Complete US1 through app enforcement + nullable columns (T007–T032)
+4. STOP and validate US1 tests pass independently
+
+### Incremental Delivery
+
+1. Add US2 (backfill) and validate idempotency + observability (T035–T043)
+2. Enforce US1 post-backfill DB constraints (T033–T034)
+3. Add US3 audit invariant (T044–T047)
+4. Final polish/runbook validation (T048–T049)