---
phase: 01-foundation
plan: 02
type: execute
wave: 1
depends_on: [01-01]
files_modified:
- providers/openai.yaml
- providers/anthropic.yaml
- providers/huggingface.yaml
- pkg/providers/schema.go
- pkg/providers/loader.go
- pkg/providers/registry.go
- pkg/providers/registry_test.go
autonomous: true
requirements: [CORE-02, CORE-03, CORE-06, PROV-10]
must_haves:
truths:
- "Provider YAML files are embedded at compile time — no filesystem access at runtime"
- "Registry loads all YAML files from embed.FS and returns a slice of Provider structs"
- "Provider schema validation rejects YAML missing format_version or last_verified"
- "Aho-Corasick automaton is built from all provider keywords at registry init"
- "keyhunter providers list command lists providers (tested via registry methods)"
artifacts:
- path: "providers/openai.yaml"
provides: "Reference provider definition with all schema fields"
contains: "format_version"
- path: "pkg/providers/schema.go"
provides: "Provider, Pattern, VerifySpec Go structs with UnmarshalYAML validation"
exports: ["Provider", "Pattern", "VerifySpec"]
- path: "pkg/providers/registry.go"
provides: "Registry struct with List, Get, Stats, AC methods"
exports: ["Registry", "NewRegistry"]
- path: "pkg/providers/loader.go"
provides: "embed.FS declaration and fs.WalkDir loading logic"
contains: "go:embed"
key_links:
- from: "pkg/providers/loader.go"
to: "providers/*.yaml"
via: "//go:embed directive"
pattern: "go:embed.*providers"
- from: "pkg/providers/registry.go"
to: "github.com/petar-dambovaliev/aho-corasick"
via: "AC automaton build at NewRegistry()"
pattern: "ahocorasick"
- from: "pkg/providers/schema.go"
to: "format_version and last_verified YAML fields"
via: "UnmarshalYAML validation"
pattern: "UnmarshalYAML"
---
Build the provider registry: YAML schema structs with validation, embed.FS loader, in-memory registry with List/Get/Stats/AC methods, and three reference provider YAML definitions. The Aho-Corasick automaton is built from all provider keywords at registry initialization.
Purpose: Every downstream subsystem (scan engine, CLI providers command, verification engine) depends on the Registry interface. This plan establishes the stable contract they build against.
Output: providers/*.yaml, pkg/providers/{schema,loader,registry}.go, registry_test.go (stubs filled).
@$HOME/.claude/get-shit-done/workflows/execute-plan.md
@$HOME/.claude/get-shit-done/templates/summary.md
@.planning/phases/01-foundation/01-RESEARCH.md
@.planning/phases/01-foundation/01-01-SUMMARY.md
Full provider YAML structure:
```yaml
format_version: 1
name: openai
display_name: OpenAI
tier: 1
last_verified: "2026-04-04"
keywords:
- "sk-proj-"
- "openai"
patterns:
- regex: 'sk-proj-[A-Za-z0-9_\-]{48,}'
entropy_min: 3.5
confidence: high
verify:
method: GET
url: https://api.openai.com/v1/models
headers:
Authorization: "Bearer {KEY}"
valid_status: [200]
invalid_status: [401, 403]
```
Provider struct fields:
FormatVersion int (yaml:"format_version" — must be >= 1)
Name string (yaml:"name")
DisplayName string (yaml:"display_name")
Tier int (yaml:"tier")
LastVerified string (yaml:"last_verified" — must be non-empty)
Keywords []string (yaml:"keywords")
Patterns []Pattern (yaml:"patterns")
Verify VerifySpec (yaml:"verify")
Pattern struct fields:
Regex string (yaml:"regex")
EntropyMin float64 (yaml:"entropy_min")
Confidence string (yaml:"confidence" — "high", "medium", "low")
VerifySpec struct fields:
Method string (yaml:"method")
URL string (yaml:"url")
Headers map[string]string (yaml:"headers")
ValidStatus []int (yaml:"valid_status")
InvalidStatus []int (yaml:"invalid_status")
type Registry struct { ... }
func NewRegistry() (*Registry, error)
func (r *Registry) List() []Provider
func (r *Registry) Get(name string) (Provider, bool)
func (r *Registry) Stats() RegistryStats // {Total int, ByTier map[int]int, ByConfidence map[string]int}
func (r *Registry) AC() ahocorasick.AhoCorasick // pre-built automaton
The embed directive must reference providers relative to loader.go location.
loader.go is at pkg/providers/loader.go.
providers/ directory is at project root.
Use: //go:embed ../../providers/*.yaml
Actually: Go embed paths must be relative and cannot use "..".
Correct approach: place the embed in a file at project root level, or adjust.
Better approach from research: put loader in providers package, embed from pkg/providers,
but reference the providers/ dir which sits at root.
Resolution: The go:embed directive path is relative to the SOURCE FILE, not the module root.
Since loader.go is at pkg/providers/loader.go, to embed ../../providers/*.yaml would work
syntactically but Go's embed restricts paths containing "..".
Use this instead: place a providers_embed.go at the PROJECT ROOT (same dir as go.mod):
package main -- NO, this breaks package separation
Correct architectural pattern (from RESEARCH.md example):
The embed FS should be in pkg/providers/loader.go using a path that doesn't traverse up.
Solution: embed the providers directory from within the providers package itself by
symlinking or — better — move the YAML files to pkg/providers/definitions/*.yaml and use:
//go:embed definitions/*.yaml
This is the clean solution: pkg/providers/definitions/openai.yaml etc.
Update files_modified accordingly. The RESEARCH.md shows //go:embed ../../providers/*.yaml
but that path won't work with Go's embed restrictions. Use definitions/ subdirectory instead.
Task 1: Provider YAML schema structs with validation
pkg/providers/schema.go, providers/openai.yaml, providers/anthropic.yaml, providers/huggingface.yaml
- /home/salva/Documents/apikey/.planning/phases/01-foundation/01-RESEARCH.md (Pattern 1: Provider Registry, Provider YAML schema section, PROV-10 row in requirements table)
- /home/salva/Documents/apikey/.planning/research/ARCHITECTURE.md (Provider Registry component, YAML schema example)
- Test 1: Provider with format_version=0 → UnmarshalYAML returns error "format_version must be >= 1"
- Test 2: Provider with empty last_verified → UnmarshalYAML returns error "last_verified is required"
- Test 3: Valid provider YAML → UnmarshalYAML succeeds, Provider.Name == "openai"
- Test 4: Provider with no patterns → loaded successfully (patterns list can be empty for schema-only providers)
- Test 5: Pattern.Confidence not in {"high","medium","low"} → error "confidence must be high, medium, or low"
Create pkg/providers/schema.go:
```go
package providers
import (
"fmt"
"gopkg.in/yaml.v3"
)
// Provider represents a single API key provider definition loaded from YAML.
type Provider struct {
FormatVersion int `yaml:"format_version"`
Name string `yaml:"name"`
DisplayName string `yaml:"display_name"`
Tier int `yaml:"tier"`
LastVerified string `yaml:"last_verified"`
Keywords []string `yaml:"keywords"`
Patterns []Pattern `yaml:"patterns"`
Verify VerifySpec `yaml:"verify"`
}
// Pattern defines a single regex pattern for API key detection.
type Pattern struct {
Regex string `yaml:"regex"`
EntropyMin float64 `yaml:"entropy_min"`
Confidence string `yaml:"confidence"`
}
// VerifySpec defines how to verify a key is live (used by Phase 5 verification engine).
type VerifySpec struct {
Method string `yaml:"method"`
URL string `yaml:"url"`
Headers map[string]string `yaml:"headers"`
ValidStatus []int `yaml:"valid_status"`
InvalidStatus []int `yaml:"invalid_status"`
}
// RegistryStats holds aggregate statistics about loaded providers.
type RegistryStats struct {
Total int
ByTier map[int]int
ByConfidence map[string]int
}
// UnmarshalYAML implements yaml.Unmarshaler with schema validation (satisfies PROV-10).
func (p *Provider) UnmarshalYAML(value *yaml.Node) error {
// Use a type alias to avoid infinite recursion
type ProviderAlias Provider
var alias ProviderAlias
if err := value.Decode(&alias); err != nil {
return err
}
if alias.FormatVersion < 1 {
return fmt.Errorf("provider %q: format_version must be >= 1 (got %d)", alias.Name, alias.FormatVersion)
}
if alias.LastVerified == "" {
return fmt.Errorf("provider %q: last_verified is required", alias.Name)
}
validConfidences := map[string]bool{"high": true, "medium": true, "low": true, "": true}
for _, pat := range alias.Patterns {
if !validConfidences[pat.Confidence] {
return fmt.Errorf("provider %q: pattern confidence %q must be high, medium, or low", alias.Name, pat.Confidence)
}
}
*p = Provider(alias)
return nil
}
```
Create the three reference YAML provider definitions. These are SCHEMA EXAMPLES for Phase 1; full pattern libraries come in Phase 2-3.
**providers/openai.yaml:**
```yaml
format_version: 1
name: openai
display_name: OpenAI
tier: 1
last_verified: "2026-04-04"
keywords:
- "sk-proj-"
- "openai"
patterns:
- regex: 'sk-proj-[A-Za-z0-9_\-]{48,}'
entropy_min: 3.5
confidence: high
verify:
method: GET
url: https://api.openai.com/v1/models
headers:
Authorization: "Bearer {KEY}"
valid_status: [200]
invalid_status: [401, 403]
```
**providers/anthropic.yaml:**
```yaml
format_version: 1
name: anthropic
display_name: Anthropic
tier: 1
last_verified: "2026-04-04"
keywords:
- "sk-ant-api03-"
- "anthropic"
patterns:
- regex: 'sk-ant-api03-[A-Za-z0-9_\-]{93,}'
entropy_min: 3.5
confidence: high
verify:
method: GET
url: https://api.anthropic.com/v1/models
headers:
x-api-key: "{KEY}"
anthropic-version: "2023-06-01"
valid_status: [200]
invalid_status: [401, 403]
```
**providers/huggingface.yaml:**
```yaml
format_version: 1
name: huggingface
display_name: HuggingFace
tier: 3
last_verified: "2026-04-04"
keywords:
- "hf_"
- "huggingface"
patterns:
- regex: 'hf_[A-Za-z0-9]{34,}'
entropy_min: 3.5
confidence: high
verify:
method: GET
url: https://huggingface.co/api/whoami-v2
headers:
Authorization: "Bearer {KEY}"
valid_status: [200]
invalid_status: [401, 403]
```
cd /home/salva/Documents/apikey && go build ./pkg/providers/... && go test ./pkg/providers/... -run TestProviderSchemaValidation -v 2>&1 | head -30
- `go build ./pkg/providers/...` exits 0
- providers/openai.yaml contains `format_version: 1` and `last_verified`
- providers/anthropic.yaml contains `format_version: 1` and `last_verified`
- providers/huggingface.yaml contains `format_version: 1` and `last_verified`
- pkg/providers/schema.go exports: Provider, Pattern, VerifySpec, RegistryStats
- Provider.UnmarshalYAML returns error when format_version < 1
- Provider.UnmarshalYAML returns error when last_verified is empty
- `grep -q 'UnmarshalYAML' pkg/providers/schema.go` exits 0
Provider schema structs exist with validation. Three reference YAML files exist with all required fields.
Task 2: Embed loader, registry with Aho-Corasick, and filled test stubs
pkg/providers/loader.go, pkg/providers/registry.go, pkg/providers/registry_test.go
- /home/salva/Documents/apikey/.planning/phases/01-foundation/01-RESEARCH.md (Pattern 1: Provider Registry with Compile-Time Embed — exact code example)
- /home/salva/Documents/apikey/pkg/providers/schema.go (types just created in Task 1)
- Test 1: NewRegistry() loads 3 providers from embedded YAML → registry.List() returns slice of length 3
- Test 2: registry.Get("openai") → returns Provider with Name=="openai", bool==true
- Test 3: registry.Get("nonexistent") → returns zero Provider, bool==false
- Test 4: registry.Stats().Total == 3 and Stats().ByTier[1] == 2 (openai + anthropic are tier 1)
- Test 5: AC automaton built — registry.AC().FindAll("sk-proj-abc") returns non-empty slice
- Test 6: AC automaton does NOT match — registry.AC().FindAll("hello world") returns empty slice
IMPORTANT NOTE ON EMBED PATHS: Go's embed package does NOT allow paths containing "..".
Since loader.go is at pkg/providers/loader.go, it CANNOT embed ../../providers/*.yaml.
Solution: Place provider YAML files at pkg/providers/definitions/*.yaml and use:
//go:embed definitions/*.yaml
This means the YAML files created in Task 1 at providers/openai.yaml etc. are the
"source of truth" files users may inspect, but the embedded versions live in
pkg/providers/definitions/. Copy them there (or move and update Task 1 output).
Actually, the cleanest solution per Go embed docs: put an embed.go file at the PACKAGE
level that embeds a subdirectory. Since pkg/providers/ package owns the embed, use:
pkg/providers/definitions/openai.yaml (embedded)
providers/openai.yaml (user-facing, can symlink or keep as docs)
For Phase 1, keep BOTH: the providers/ root dir for user reference, definitions/ for embed.
Copy the three YAML files from providers/ to pkg/providers/definitions/ at the end.
Create **pkg/providers/loader.go**:
```go
package providers
import (
"embed"
"fmt"
"io/fs"
"path/filepath"
"gopkg.in/yaml.v3"
)
//go:embed definitions/*.yaml
var definitionsFS embed.FS
// loadProviders reads all YAML files from the embedded definitions FS.
func loadProviders() ([]Provider, error) {
var providers []Provider
err := fs.WalkDir(definitionsFS, "definitions", func(path string, d fs.DirEntry, err error) error {
if err != nil {
return err
}
if d.IsDir() || filepath.Ext(path) != ".yaml" {
return nil
}
data, err := definitionsFS.ReadFile(path)
if err != nil {
return fmt.Errorf("reading provider file %s: %w", path, err)
}
var p Provider
if err := yaml.Unmarshal(data, &p); err != nil {
return fmt.Errorf("parsing provider %s: %w", path, err)
}
providers = append(providers, p)
return nil
})
return providers, err
}
```
Create **pkg/providers/registry.go**:
```go
package providers
import (
"fmt"
ahocorasick "github.com/petar-dambovaliev/aho-corasick"
)
// Registry is the in-memory store of all loaded provider definitions.
// It is initialized once at startup and is safe for concurrent reads.
type Registry struct {
providers []Provider
index map[string]int // name -> slice index
ac ahocorasick.AhoCorasick // pre-built automaton for keyword pre-filter
}
// NewRegistry loads all embedded provider YAML files, validates them, builds the
// Aho-Corasick automaton from all provider keywords, and returns the Registry.
func NewRegistry() (*Registry, error) {
providers, err := loadProviders()
if err != nil {
return nil, fmt.Errorf("loading providers: %w", err)
}
index := make(map[string]int, len(providers))
var keywords []string
for i, p := range providers {
index[p.Name] = i
keywords = append(keywords, p.Keywords...)
}
builder := ahocorasick.NewAhoCorasickBuilder(ahocorasick.Opts{DFA: true})
ac := builder.Build(keywords)
return &Registry{
providers: providers,
index: index,
ac: ac,
}, nil
}
// List returns all loaded providers.
func (r *Registry) List() []Provider {
return r.providers
}
// Get returns a provider by name and a boolean indicating whether it was found.
func (r *Registry) Get(name string) (Provider, bool) {
idx, ok := r.index[name]
if !ok {
return Provider{}, false
}
return r.providers[idx], true
}
// Stats returns aggregate statistics about the loaded providers.
func (r *Registry) Stats() RegistryStats {
stats := RegistryStats{
Total: len(r.providers),
ByTier: make(map[int]int),
ByConfidence: make(map[string]int),
}
for _, p := range r.providers {
stats.ByTier[p.Tier]++
for _, pat := range p.Patterns {
stats.ByConfidence[pat.Confidence]++
}
}
return stats
}
// AC returns the pre-built Aho-Corasick automaton for keyword pre-filtering.
func (r *Registry) AC() ahocorasick.AhoCorasick {
return r.ac
}
```
Then copy the three YAML files into the embed location:
```bash
mkdir -p /home/salva/Documents/apikey/pkg/providers/definitions
cp /home/salva/Documents/apikey/providers/openai.yaml /home/salva/Documents/apikey/pkg/providers/definitions/
cp /home/salva/Documents/apikey/providers/anthropic.yaml /home/salva/Documents/apikey/pkg/providers/definitions/
cp /home/salva/Documents/apikey/providers/huggingface.yaml /home/salva/Documents/apikey/pkg/providers/definitions/
```
Finally, fill in **pkg/providers/registry_test.go** (replacing the stubs from Plan 01).
Write ONLY the following content — do not include any earlier draft versions:
```go
package providers_test
import (
"testing"
"github.com/salvacybersec/keyhunter/pkg/providers"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
"gopkg.in/yaml.v3"
)
func TestRegistryLoad(t *testing.T) {
reg, err := providers.NewRegistry()
require.NoError(t, err)
assert.GreaterOrEqual(t, len(reg.List()), 3, "expected at least 3 providers")
}
func TestRegistryGet(t *testing.T) {
reg, err := providers.NewRegistry()
require.NoError(t, err)
p, ok := reg.Get("openai")
assert.True(t, ok)
assert.Equal(t, "openai", p.Name)
assert.Equal(t, 1, p.Tier)
_, notOk := reg.Get("nonexistent-provider")
assert.False(t, notOk)
}
func TestRegistryStats(t *testing.T) {
reg, err := providers.NewRegistry()
require.NoError(t, err)
stats := reg.Stats()
assert.GreaterOrEqual(t, stats.Total, 3)
assert.GreaterOrEqual(t, stats.ByTier[1], 2)
}
func TestAhoCorasickBuild(t *testing.T) {
reg, err := providers.NewRegistry()
require.NoError(t, err)
ac := reg.AC()
matches := ac.FindAll("export OPENAI_API_KEY=sk-proj-abc")
assert.NotEmpty(t, matches)
noMatches := ac.FindAll("hello world nothing here")
assert.Empty(t, noMatches)
}
func TestProviderSchemaValidation(t *testing.T) {
invalid := []byte("format_version: 0\nname: invalid\nlast_verified: \"\"\n")
var p providers.Provider
err := yaml.Unmarshal(invalid, &p)
assert.Error(t, err)
assert.Contains(t, err.Error(), "format_version")
}
```
cd /home/salva/Documents/apikey && go test ./pkg/providers/... -v -count=1 2>&1 | tail -20
- `go test ./pkg/providers/... -v` exits 0 with all 5 tests PASS (not SKIP)
- TestRegistryLoad passes with >= 3 providers
- TestRegistryGet passes — "openai" found, "nonexistent" not found
- TestRegistryStats passes — Total >= 3
- TestAhoCorasickBuild passes — "sk-proj-" match found, "hello world" empty
- TestProviderSchemaValidation passes — error on format_version=0
- `grep -q 'go:embed' pkg/providers/loader.go` exits 0
- pkg/providers/definitions/ directory exists with 3 YAML files
Registry loads providers from embedded YAML, builds Aho-Corasick automaton, exposes List/Get/Stats/AC. All 5 tests pass.
After both tasks:
- `go test ./pkg/providers/... -v -count=1` exits 0 with 5 tests PASS
- `go build ./...` still exits 0
- `grep -q 'format_version' providers/openai.yaml providers/anthropic.yaml providers/huggingface.yaml` exits 0
- `grep -q 'go:embed' pkg/providers/loader.go` exits 0
- pkg/providers/definitions/ has 3 YAML files (same content as providers/)
- 3 reference provider YAML files exist in providers/ and pkg/providers/definitions/ with format_version and last_verified
- Provider schema validates format_version >= 1 and non-empty last_verified (PROV-10)
- Registry loads providers from embed.FS at compile time (CORE-02)
- Aho-Corasick automaton built from all keywords at NewRegistry() (CORE-06)
- Registry exposes List(), Get(), Stats(), AC() (CORE-03)
- 5 provider tests all pass