Discriminator constants

Pinned instruction discriminators, PDA seed prefixes, and account size canaries used across AgentTrust.

The constants below are the load-bearing discriminators and seeds AgentTrust depends on. Anything that drifts here breaks downstream tooling.

Quantu CPI discriminator

Value	Notes
`[145, 136, 123, 3, 215, 165, 98, 41]`	`agent_registry_8004::give_feedback` 8-byte instruction discriminator. TrustGate's `emit_feedback` and `dispute_payment` invoke this via `invoke_signed`.

Program	Seed prefix	Seeds	What it identifies
`policy_vault`	`b"policy"`	`["policy", agent_asset, policy_id_le]`	`PolicyAccount`
`policy_vault`	`b"velocity"`	`["velocity", agent_asset, policy_id_le]`	`VelocityLedger`
`policy_vault`	`b"killswitch"`	`["killswitch", &[scope_kind], scope_key]`	`KillSwitchState`
`policy_vault`	`b"policy_authority"`	`["policy_authority", agent_asset]`	`PolicyAuthority`
`trustgate`	`b"trustgate_auth"`	`["trustgate_auth", facilitator]`	`TrustGateAuthority`
`trustgate`	`b"feedback_log"`	`["feedback_log", payment_id_hash]`	`FeedbackEmissionLog`
`validation_registry`	`b"capability"`	`["capability", capability_hash]`	`CapabilityNamespace`
`validation_registry`	`b"attestor"`	`["attestor", attestor_pubkey]`	`AttestorProfile`
`validation_registry`	`b"request"`	`["request", subject_asset, capability_hash, requester]`	`ValidationRequest`
`validation_registry`	`b"attestation"`	`["attestation", subject_asset, capability_hash, attestor]`	`ValidationAttestation`

The SDK exposes derivers for every PDA: SDK → Exports reference.

Account	Size	Source
`PolicyAccount`	240	`policy_account.rs`
`VelocityLedger`	80	`velocity_ledger.rs`
`KillSwitchState`	96	`kill_switch_state.rs`
`PolicyAuthority`	272	`policy_authority.rs`
`TrustGateAuthority`	104	`trustgate_authority.rs`
`FeedbackEmissionLog`	72	`feedback_emission_log.rs`
`ValidationAttestation`	290	`validation_attestation.rs`
`AtomStats` (Quantu)	561	upstream-pinned at commit `bfb09ad`; canary at byte 560

Sizes are validated at parse time — a size mismatch fails loud rather than silently misread.

DISPUTE_SCORE (the score dispute_payment hard-codes for negative feedback) lives at programs/trustgate/src/constants.rs.

Field	Limit	Error
`CapabilityNamespace.name`	min 3, max 32 bytes; no `':'`	`NameTooShort` / `NameTooLong` / `NamespaceColonForbidden`
`CapabilityNamespace.version`	≤ 16 bytes	`VersionTooLong`
`CapabilityNamespace.schema_uri`	≤ 160 bytes	`UriTooLong`
`AttestorProfile.display_name_uri`	≤ 100 bytes	`UriTooLong`

Bitmask flags for PolicyAccount.enabled_kinds_bitmask:

gate_mode enum:

Value	Constant	Reads
`0`	`GATE_MODE_IMMEDIATE`	`AtomStats.tier_immediate` (byte 551)
`1`	`GATE_MODE_CONFIRMED`	`AtomStats.tier_confirmed` (byte 555)

default_unrated_treatment enum:

Value	Constant	Composer maps to
`0`	`UNRATED_DENY`	`Deny(UnratedTreatmentDeny)` (code 15)
`1`	`UNRATED_ALLOW`	`Allow`
`2`	`UNRATED_REQUIRE_VALIDATION`	`RequireValidation(capability_hash)`