- loader.go with go:embed definitions/*.yaml for compile-time embedding
- registry.go with List(), Get(), Stats(), AC() methods
- Aho-Corasick automaton built from all provider keywords at NewRegistry()
- pkg/providers/definitions/ with 3 YAML files for embed
- All 5 provider tests pass: load, get, stats, AC, schema validation
- main.go entry point (7 lines) delegates to cmd.Execute()
- cmd/root.go stub so go build ./... compiles (Plan 05 replaces)
- pkg/providers, pkg/storage, pkg/engine package stubs
- Test stubs with t.Skip() for providers, storage, engine packages
- testdata/samples: openai_key.txt, anthropic_key.txt, multiple_keys.txt, no_keys.txt
- go build ./... and go test ./... -short both exit 0
- Encrypt/Decrypt using AES-256-GCM with random nonce prepended to ciphertext
- ErrCiphertextTooShort sentinel error for malformed ciphertext
- DeriveKey using Argon2id RFC 9106 params (time=1, mem=64MB, threads=4, keyLen=32)
- NewSalt generates cryptographically random 16-byte salt
- Tests for AES-256-GCM encrypt/decrypt roundtrip
- Tests for Argon2id key derivation determinism
- Tests for SQLite open with schema tables
- Tests for SaveFinding/ListFindings with encryption contract
- Tests verify raw BLOB does not contain plaintext key
