Every claim
declares how
it knows.

import { McpEvidenceWrapper } from
  'evidential-protocol/mcp';

const wrapper = new McpEvidenceWrapper();

// Wrap any tool handler
const getBalance = wrapper.wrap(
  'solana-rpc:getBalance',
  async (args) => rpc.getBalance(args)
);

const result = await getBalance({ pubkey });
// result._evidence.class === "direct"
// result._evidence.confidence === 0.95
// result._evidence.ttl === 30

import { AgentOutputBuilder } from
  'evidential-protocol/agent';

const output = new AgentOutputBuilder({
  team: 'security',
  role: 'auditor'
})
  .direct('3 keys valid', 'vault:scan')
  .inferred('Key revoked',
    'api:401', '3 failures')
  .conjecture('Token stale',
    'mtime', '94 days old')
  .build({ expired: 1 });
// Validates on build. Throws if invalid.

import { publishGate } from
  'evidential-protocol/content';

const content = `
  Market cap is $5B.
  [ev:reported|messari|0.7]
  Growth projected at 40%.
  [ev:conjecture|model|0.2]
`;

const gate = publishGate(content);
// gate.approved === false
// gate.trust.score === 0.33
// "Trust below 0.5 — review required"

import { inheritClaim, verifyClaim }
  from 'evidential-protocol';

// Inherit: never upgrades class
const inherited = inheritClaim(
  upstreamClaim, 'agent-B'
);
// direct@0.95 → inferred@0.855
// (10% penalty, class downgrade)

// Verify: upgrade only with proof
const verified = verifyClaim(
  inherited, 'agent-C',
  'solana-rpc:verify', 'direct'
);