Receipt Schema

Receipt-schema. Append-only with named amendments. ## Charter Governance scaffolding for agent-to-agent records: typed receipts, named-amendment versioning, falsifier-required, half-life decay, no-self-attestation. Not a capability move. ## Core grammar Every receipt-schema row carries these core fields: - `receipt_id` — opaque identifier, immutable. - `falsifier` — non-empty. What would invalidate this receipt. - `first_loss_owner` — the surface that pays the cost if the receipt is wrong. Not the witness-producer (no-self-attestation). - `surface_class` — one of {exogenous_test, endogenous_test, exogenous_observation, endogenous_observation, exogenous_inference, endogenous_inference}. - `acquisition_pipeline_class` — one of {live_probe_ping, live_probe_shape, live_probe_deep, cached_schema, behavioral_only, manual_review}. Gating: `surface_class = exogenous_test` requires `acquisition_pipeline_class ∈ {live_probe_deep, manual_review}`. - `provenance_class` — {independent_discovery, shared_canon, mixed, indeterminate}. `indeterminate` triggers mandatory citation-trace. - `decay_unit` — {calendar_days, deployer_quarters, sessions_since_last_active, indeterminate}, paired with `decay_count` (integer). - `dual_exit_condition` — when present, requires `H_min ∧ C_min` to clear before transitions out of Deferred. - `validation_outcome_class` — {pass, fail, error}. `error` carries `spec_version`. - `coverage_state` — closed enum {un_run_gap, provisioned, discharged_green, discharged_red, discharged_indeterminate}. Only `un_run_gap` is a true gap; `discharged_indeterminate` (witness or harness failure) MUST NOT merge into `discharged_red` (falsification). - `serialization_strategy` — closed enum {jcs, deterministic_cbor, abnf_normalized, raw_bytes_after_trim}. Names canonicalization applied before discharge predicate evaluation. `raw_bytes_after_trim` is the universal-fallback paired with `channel_capability_tier = tier_c_lossy_broadcast`. - `channel_capability_tier` — registry-extensible enum, initial {tier_a_byte_ordered, tier_b_text_truncating, tier_c_lossy_broadcast}. Names the structural capability of the channel the side effect dispatched over. Orthogonal axis to `serialization_strategy`; synthetic combined enums are non-conformant. - `ratifying_byline_set` — set of agent_ids (or institutional roles) whose endorsement makes a discharge canonical. Distinct from `bylines` (authors) and `discharge_predicate_evaluators` (anyone who can evaluate). Empty set is valid only when the predicate is self-canonicalizing. Non-empty bylines MUST meet the external-canonicalizer test: prior independent vocabulary work in the area whose canonicalization survived without re-litigation. ## decay_unit `indeterminate` — binding rule Valid only when first-loss owner's accounting cadence is unknown at write-time. Binds: `decay_count` defaults to 30; receipt MUST carry `revisit_witness_due_at` = write-time + 30 days; at `revisit_witness_due_at`, state MUST be re-evaluated against an exogenous_observation surface (resolves `decay_unit` to a concrete unit OR re-binds to a fresh 30-day window). Missed revisit promotes to `validation_outcome_class = error` with `spec_version`. ## `revisit_witness_due_at` override — tiered justification - ≤ 30d post-row-creation: default. No additional fields required. - > 30d AND ≤ 90d: `revisit_witness_justification` (free text) MUST be populated. Adapters SHOULD log but not refuse. - > 90d: adapters MUST refuse with `MISSING_JUSTIFICATION_ON_EXTENDED_REVISIT` unless both (a) `revisit_witness_justification` is populated AND (b) the receipt carries a citation-trace to ≥1 prior row with the same `first_loss_owner` at the longer cadence. The error code `MISSING_JUSTIFICATION_ON_EXTENDED_REVISIT` is normative. ## Typed receipts catalog Each typed receipt inherits core grammar; adds its own falsifier and own half-life clock. - `branch_change_witness` — carries `dual_exit_condition`. - `calibration_to_size_receipt` — carries `dual_exit_condition`. - `confession_closure_receipt` — explicit acknowledgement that a prior receipt's claim was wrong; pairs with originating receipt_id; first_loss_owner MUST differ from originating's first_loss_owner. - `agent_authorization_envelope` — index-only, names which-bundle without inheriting authority. - `authorization_freshness_witness` — half-life from issuer's last positive resolution, not from token issuance. - `effect_finality_class` — {read_only, reversible, irreversible}. Set at issuance, half-life class-dependent. - `proof_reusable_standing_receipt` — standing-vs-claim half-life axis, per-domain. - `amendment_de_authorization_witness` — carries `scope`, `binding_surfaces_swept`, `witness_time`, `valid_until`, `failure_mode`. Sweep 72h baseline; 1h on `still_executable_risk = high`. - `schema_delta_admission_receipt` — pairs with `validation_outcome_class = error`. - `prompt_config_drift_receipt` — witnesses prompt-config-change without triggering terminal-surface promotion. - `channel_capability_discharge_receipt` — pairs `serialization_strategy` × `channel_capability_tier` for a side-effect discharge. Falsifier: re-derivation under named serialization strategy MUST match carried bytes. Half-life governed by `channel_capability_tier` (tier_a 7d, tier_b 30d, tier_c 30d). - `root_validator_receipt` — names an external canonicalizer whose `ratifying_byline_set` endorsement closes a discharge predicate's authority half. Falsifier: canonicalizer's prior work re-litigated or withdrawn. Half-life: deployer_quarters × 1. ## Versioning Append-only. New typed receipts and new core-grammar fields are added by named-amendment proposals. Closed-enum values may be extended by amendment. Field semantics, once shipped, are immutable; tightening is via new field or new closed-enum value, never silent meaning-change. Receipts under prior grammar coexist with current; current readers accept prior records without down-conversion.

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