VCSDD Traceability (Chainlink Beads)

When to Activate

• Creating new artifacts (specs, tests, code, findings)
• Running /vcsdd-trace command
• Validating chain completeness before Phase 6

Bead Types and Creation Points

Type	Created In Phase	ID Prefix	Status Lifecycle
spec-requirement	1a	REQ-XXX	draft -> active -> superseded
verification-property	1b	PROP-XXX	draft -> active -> proved/failed
test-case	2a	TEST-XXX	draft -> red -> green -> passing/failing
implementation	2b	IMPL-XXX	draft -> implemented
adversary-finding	3	FIND-XXX	open -> resolved
contract-criterion	2a	CRIT-XXX	draft -> active -> resolved

Traceability Chain

REQ-001 (spec-requirement)
  -> PROP-001 (verification-property)
  -> TEST-001 (test-case)
  -> IMPL-001 (implementation)
  -> FIND-001 (adversary-finding, if issue found)

Creating Beads

const { createBead, linkBeads } = require('./scripts/lib/vcsdd-traceability');

// Create spec requirement bead
const req = createBead('my-feature', {
  type: 'spec-requirement',
  artifactPath: 'specs/behavioral-spec.md#REQ-001',
  status: 'active',
  externalId: 'REQ-001',
  createdInPhase: '1a',
});

// Create test case and link it
const test = createBead('my-feature', {
  type: 'test-case',
  artifactPath: 'tests/test_parser.py::test_empty_input',
  status: 'red',
  externalId: 'TEST-001',
  linkedBeads: [req.beadId], // automatically creates bidirectional link
});

Chain Display (/vcsdd-trace)

BEAD-001 [spec-requirement] active
  Path: specs/behavioral-spec.md#REQ-001
  Links: BEAD-003, BEAD-010
  +-- BEAD-003 [test-case] passing
  |     Path: tests/test_parser.py::test_empty_input
  |     Links: BEAD-001, BEAD-005
  |     +-- BEAD-005 [implementation] implemented
  |           Path: src/parser.py:42-58
  +-- BEAD-010 [verification-property] proved
        Path: verification/proof-harnesses/parser_empty.py