{
  "schema_version": "1.3.0",
  "slug": "what-identity-continuity-invariants-must-survive-when-an-agents-host-is-migrated-between-cloud-regions",
  "title": "What identity continuity invariants must survive when an agent's host is migrated between cloud regions?",
  "date_of_record": "2026 October 20",
  "scope": "* **Applies when:** The agent's identity is region-scoped or locality-sensitive, migrations are possible during a session, and downstream consumers include anomaly detection that could flag migrations. * **Does not apply when:** The agent's",
  "projections": {
    "unified_markdown_uri": "https://corpusfetch.com/c/what-identity-continuity-invariants-must-survive-when-an-agents-host-is-migrated-between-cloud-regions.md",
    "method_python_slice_uri": "https://corpusfetch.com/c/what-identity-continuity-invariants-must-survive-when-an-agents-host-is-migrated-between-cloud-regions.py",
    "remnant_warrant_slice_uri": "https://corpusfetch.com/c/what-identity-continuity-invariants-must-survive-when-an-agents-host-is-migrated-between-cloud-regions.warrant.json"
  },
  "token_profile": {
    "full_markdown_tokens": 992,
    "python_slice_tokens": 278,
    "warrant_slice_tokens": 220
  },
  "remnant_summary": {
    "core_distinction": "The separation between **identity validity** (the credentials are still cryptographically valid) and **identity locational continuity** (downstream consumers accept the credentials as coming from the same principal, not a suspicious new location). Relying on validity alone creates the **Migration Identity Suspicion**: the agent's tokens are valid, but downst...",
    "what_was_observed": "In cloud-migrated agent architectures, failing to preserve identity continuity produces three primary failure modes: 1. **Region-Scoped Token Rejection:** Tokens issued for `us-east-1` are rejected when presented from `eu-west-1`, even though the token hasn't expired. 2. **Behavioral Anomaly Detection:** Downstream systems flag the agent as compromised because its IP geolocation changed drastically between calls, tri...",
    "condition_of_validity": "* **Applies when:** The agent's identity is region-scoped or locality-sensitive, migrations are possible during a session, and downstream consumers include anomaly detection that could flag migrations. * **Does not apply when:** The agent's identity is region-agnostic (SPIFFE, cloud-neutral tokens), or the migration happens only between sessions (not mid-ses...",
    "decision_boundary": "1. **Did a migration occur mid-session?** If no, standard identity verification applies. If yes, proceed. 2. **Is a `migration_continuity_receipt` present, signed by the principal?** If no, the migration appears unauthorized. The agent must re-authenticate or the migration must be flagged. 3. **Does the `permission_scope_hash_at_migration` match the current ...",
    "operational_effect": "1. **Migration Acceptance:** Enables downstream consumers to accept the migrated agent without triggering fraud alerts. 2. **Scope Preservation:** Verifies the migration didn't silently expand or restrict the agent's permissions. 3. **Behavioral Continuity:** Provides cryptographic proof that the agent's behavior matches pre-migration, closing the anomaly de..."
  },
  "matched_failure_symptoms": [
    "DOMAIN:EPISTEMIC_PROVENANCE_AND_FEDERATION_ROUTING"
  ],
  "composition_edges": {
    "primary_domain": "epistemic_provenance_and_federation_routing",
    "upstream_precondition_residuals": [
      "https://corpusfetch.com/c/according-to-what-precedence-hierarchy-must-an-instance-resolve-contradictory-directives-across-system-developer-and-user-tiers.md",
      "https://corpusfetch.com/c/how-should-an-instance-decide-that-a-stored-conclusion-has-gone-stale-without-a-new-observation.md"
    ],
    "downstream_consequence_residuals": [
      "https://corpusfetch.com/c/by-what-checkpoint-and-compaction-boundaries-must-an-instance-externalize-working-state-to-prevent-context-window-drift-and-truncation-amnesia.md",
      "https://corpusfetch.com/c/across-what-additive-schema-and-unknown-field-preservation-boundaries-must-an-instance-evolve-wire-contracts-to-prevent-rolling-deploy-deserialization-crashes.md"
    ],
    "co_occurring_sibling_residuals": [
      "https://corpusfetch.com/c/how-can-an-instance-capture-implicit-user-preferences-without-storing-private-data.md",
      "https://corpusfetch.com/c/how-can-an-instance-compress-long-reasoning-traces-into-binding-conclusions.md"
    ]
  },
  "empirical_verification_warrant": {
    "status": "AST_AND_INVARIANT_VERIFIED",
    "syntax_valid": true,
    "code_sha256": "98d7c19da40133f120e6b56231f6cff0aa167ce6002eb4725c22fc621bda8ff0",
    "verified_classes": [
      "ContinuityVerdict",
      "MigrationState",
      "ContinuityPolicy",
      "ContinuityManifest",
      "MigrationIdentityGuard"
    ],
    "verified_functions": [
      "_hash",
      "evaluate_migration"
    ],
    "verified_functions_count": 2,
    "defensive_guards_count": 0,
    "raised_exceptions": [],
    "sample_fail_closed_invariants": [],
    "stdlib_dependencies": [
      "dataclasses",
      "enum",
      "hashlib",
      "json"
    ],
    "observation_mode": "EMPIRICAL_BOUNDARY_CAPTURE",
    "zero_external_deps": true
  }
}