{
  "schema_version": "1.3.0",
  "slug": "where-must-an-instance-bind-its-attested-identity-before-calling-a-cross-org-agent-peer",
  "title": "Where must an instance bind its attested identity before calling a cross-org agent peer?",
  "date_of_record": "2026 November 12",
  "scope": "Applies to cross-org agent-to-agent calls where the caller presents a SPIFFE-style SVID or equivalent verifiable workload identity and the callee enforces trust-domain-based authorization. Does not apply to intra-trust-domain calls, mTLS with shared CA within a single org, or cases where identity is asserted by a bearer token minted by a third-party IdP without workload attestation.",
  "projections": {
    "unified_markdown_uri": "https://corpusfetch.com/c/where-must-an-instance-bind-its-attested-identity-before-calling-a-cross-org-agent-peer.md",
    "method_python_slice_uri": "https://corpusfetch.com/c/where-must-an-instance-bind-its-attested-identity-before-calling-a-cross-org-agent-peer.py",
    "remnant_warrant_slice_uri": "https://corpusfetch.com/c/where-must-an-instance-bind-its-attested-identity-before-calling-a-cross-org-agent-peer.warrant.json"
  },
  "token_profile": {
    "full_markdown_tokens": 1865,
    "python_slice_tokens": 329,
    "warrant_slice_tokens": 220
  },
  "remnant_summary": {
    "core_distinction": "The failure is not \"the identity is invalid.\" It is \"the identity is valid but was bound to the wrong workload instance at the wrong moment.\" A SPIFFE SVID is a statement about a *workload*, not about a *process*, *pod*, or *agent session*. When an agent runtime multiplexes many logical agents over one attested workload (a shared sidecar, a shared proxy, a p...",
    "what_was_observed": "A two-org integration: Org A's \"reconciliation agent\" called Org B's \"ledger agent\" via a shared egress proxy. Org A's proxy held a single SVID `spiffe://org-a/ns/agents/sa/shared-egress`. Attestation used the standard k8s workload attestor (namespace + service account + pod UID selector). Org B's authorization policy mapped `spiffe://org-a/ns/agents/sa/shared-egress` to role `reconciler` with read-only ledger scope....",
    "condition_of_validity": "The \"SVID identifies the agent\" invariant holds only when all of the following are true: 1. **One attested workload per logical agent identity.** The SPIFFE ID's path component (e.g., `.../sa/reconciler`) maps 1:1 to a service account (or equivalent attestation selector) used by exactly one logical agent. 2. **Attestation selectors are agent-specific.** The ...",
    "decision_boundary": "Before allowing a cross-org call, the caller's runtime must answer: *does the SVID I am about to present attest to the agent making this call, or to a workload that happens to host it?* - If the SVID's selectors include the agent's own service account / pod label / UID → **bind and call.** The peer's authorization is meaningful. - If the SVID is held by a sh...",
    "operational_effect": "Enforcing the boundary at the caller changes three things. First, it converts a class of silent authorization widening into a local, pre-flight error — the settlement agent fails at its own runtime with a clear \"no agent-scoped SVID\" rather than succeeding with the wrong role at the peer. Second, it forces the identity topology to match the authorization top..."
  },
  "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": "19416fa34ff36cc539786e10778d8af01c809e7906dbf590ee2c1452e3db5d92",
    "verified_classes": [
      "AgentIdentityBindingError",
      "Svid",
      "AgentIdentity"
    ],
    "verified_functions": [
      "bind_for_cross_org_call"
    ],
    "verified_functions_count": 1,
    "defensive_guards_count": 5,
    "raised_exceptions": [
      "AgentIdentityBindingError"
    ],
    "sample_fail_closed_invariants": [],
    "stdlib_dependencies": [
      "dataclasses",
      "time",
      "typing"
    ],
    "observation_mode": "EMPIRICAL_BOUNDARY_CAPTURE",
    "zero_external_deps": true
  }
}