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docs(07): create phase plan

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gurix
2026-03-26 21:38:56 +01:00
parent 050d67d9f1
commit 006e465b1e
3 changed files with 752 additions and 2 deletions
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.planning/ROADMAP.md
+6 -2
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@@ -68,7 +68,11 @@ Plans:
2. User-defined rules fire before built-in protocol rules — a custom rule for port 443 overrides the default HTTPS classification for packets on that port
3. A user-defined class name gets its own synthesis layer automatically — no silence or missing audio for traffic matched by a custom rule
4. User runs `netsynth --print-config` and sees the full effective config (defaults merged with their overrides) as commented TOML, without starting a capture
**Plans**: TBD
**Plans:** 2 plans
Plans:
- [ ] 07-01-PLAN.md — Config extension: RawRule, LoadResult, rule validation, auto-freq assignment (TDD)
- [ ] 07-02-PLAN.md — CLI wiring: --print-config flag, user rule prepend, PrintConfig output
## Progress
@@ -80,4 +84,4 @@ Plans:
| 4. Power User Features | v1.0 | 2/2 | Complete | 2026-03-26 |
| 5. Waveform Types and Bank Decoupling | v1.1 | 2/2 | Complete | 2026-03-26 |
| 6. Config Package and Sound Overrides | v1.1 | 2/2 | Complete | 2026-03-26 |
| 7. Custom Rules and Print-Config | v1.1 | 0/? | Not started | - |
| 7. Custom Rules and Print-Config | v1.1 | 0/2 | Not started | - |
.planning/phases/07-custom-rules-and-print-config/07-01-PLAN.md
+302
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@@ -0,0 +1,302 @@
---
phase: 07-custom-rules-and-print-config
plan: 01
type: tdd
wave: 1
depends_on: []
files_modified:
- config/config.go
- config/config_test.go
autonomous: true
requirements:
- RULE-01
- RULE-02
- RULE-03
must_haves:
truths:
- "TOML [[rules]] blocks parse into classify.Rule slices"
- "Missing protocol or class in a rule produces a clear error at startup"
- "User rules are returned separately from FreqCfgs for caller to prepend"
- "New class names without explicit sound config get auto-assigned frequencies in 1200-2400 Hz range"
- "Built-in class names in user rules do not get overwritten by auto-freq"
artifacts:
- path: "config/config.go"
provides: "RawRule, LoadResult, validateRules, convertRules, autoAssignFreq, addAutoFreqEntries"
contains: "type LoadResult struct"
- path: "config/config_test.go"
provides: "Tests for rule parsing, validation, auto-freq, LoadResult"
contains: "TestLoadCustomRules"
key_links:
- from: "config/config.go"
to: "classify/rules.go"
via: "convertRules produces []classify.Rule"
pattern: "classify\\.Rule"
- from: "config/config.go"
to: "synth/config.go"
via: "autoAssignFreq creates FreqConfig entries with WaveformPresetHarmonics"
pattern: "synth\\.WaveformPresetHarmonics"
---
<objective>
Extend the config package to parse `[[rules]]` TOML blocks into classification rules, validate them, auto-assign frequencies for new class names, and return a `LoadResult` struct from `Load()`.
Purpose: This is the data layer for user-defined classification rules (RULE-01, RULE-02, RULE-03). The LoadResult struct becomes the contract consumed by Plan 02 for CLI wiring and print-config.
Output: Updated `config/config.go` with RawRule, LoadResult, validation, auto-freq; comprehensive tests in `config/config_test.go`.
</objective>
<execution_context>
@$HOME/.claude/get-shit-done/workflows/execute-plan.md
@$HOME/.claude/get-shit-done/templates/summary.md
</execution_context>
<context>
@.planning/PROJECT.md
@.planning/ROADMAP.md
@.planning/STATE.md
@.planning/phases/07-custom-rules-and-print-config/07-CONTEXT.md
@.planning/phases/07-custom-rules-and-print-config/07-RESEARCH.md
@config/config.go
@config/config_test.go
@classify/rules.go
@classify/types.go
@synth/config.go
<interfaces>
<!-- Key types and contracts the executor needs. -->
From classify/rules.go:
```go
type Rule struct {
Protocol string
DstPort uint16
Class TrafficClass
}
var DefaultRules = []Rule{ ... } // 12 rules, first-match-wins
```
From classify/types.go:
```go
type TrafficClass string
func AllClasses() []TrafficClass // returns 14 built-in classes
```
From synth/config.go:
```go
type WaveformType int
const WaveformSine WaveformType = 1
type FreqConfig struct {
BaseHz float64
Harmonics []HarmonicDef
Pan float64
WaveformType WaveformType
}
var ClassFreqConfigs = map[classify.TrafficClass]FreqConfig{ ... } // 14 entries, max 1047 Hz
func WaveformPresetHarmonics(wt WaveformType, baseHz float64, sampleRate int) []HarmonicDef
const SampleRate = 44100
```
From config/config.go (current):
```go
type SoundOverride struct {
Frequency *float64 `toml:"frequency"`
Waveform *string `toml:"waveform"`
}
type rawConfig struct {
Sounds map[string]SoundOverride `toml:"sounds"`
}
func Load(configPath string) (map[classify.TrafficClass]synth.FreqConfig, error)
```
From config/config_test.go (patterns):
```go
func writeTOML(t *testing.T, content string) string // creates temp TOML file
// Tests call config.Load(path) and check returned map
```
</interfaces>
</context>
<tasks>
<task type="auto" tdd="true">
<name>Task 1: RawRule, LoadResult, validation, conversion, and auto-freq with TDD</name>
<files>config/config.go, config/config_test.go</files>
<read_first>config/config.go, config/config_test.go, classify/rules.go, classify/types.go, synth/config.go</read_first>
<behavior>
- TestLoadCustomRules: TOML with `[[rules]]` block (port=8080, protocol="tcp", class="MyApp") + `[sounds.MyApp]` (frequency=300.0) parses successfully; LoadResult.UserRules has len 1 with Protocol="tcp", DstPort=8080, Class="MyApp"; LoadResult.FreqCfgs["MyApp"].BaseHz == 300.0
- TestLoadCustomRuleNoPort: TOML with `[[rules]]` (protocol="udp", class="AllUDP", no port field) parses; UserRules[0].DstPort == 0
- TestLoadCustomRuleMissingProtocol: TOML `[[rules]]` with class="X" but no protocol field -> error containing "protocol is required"
- TestLoadCustomRuleMissingClass: TOML `[[rules]]` with protocol="tcp" but no class field -> error containing "class is required"
- TestLoadCustomRuleInvalidProtocol: TOML `[[rules]]` with protocol="ftp" -> error containing "invalid protocol"
- TestLoadCustomRuleUnknownField: TOML `[[rules]]` with typo_field="bad" -> error containing "typo_field" (from Undecoded())
- TestUserRulesPrepend: Load returns UserRules separately from FreqCfgs; caller can do `append(result.UserRules, classify.DefaultRules...)` to get user rules first
- TestAutoFreqAssignment: TOML with `[[rules]]` (class="GameServer", protocol="tcp") and NO `[sounds.GameServer]` -> FreqCfgs contains "GameServer" entry with BaseHz in range [1200, 2350] and WaveformType == WaveformSine
- TestAutoFreqDeterministic: Two Load() calls with same class name produce same BaseHz
- TestAutoFreqSkipsBuiltins: TOML with `[[rules]]` (class="HTTPS", protocol="tcp", port=443) -> FreqCfgs["HTTPS"].BaseHz == 175.0 (the default), NOT an auto-assigned value
- TestLoadResultConfigPath: Load(explicit_path) -> LoadResult.ConfigPath == explicit_path; Load("") with no file -> LoadResult.ConfigPath == ""
- TestLoadNoConfigReturnsLoadResult: Load("") in empty dir returns LoadResult with len(FreqCfgs)==14, len(UserRules)==0, ConfigPath==""
- TestExistingTestsStillPass: All 8 existing tests in config_test.go continue to pass after Load() signature change (they need updating to use LoadResult)
</behavior>
<action>
RED phase -- Write all test functions listed in behavior above in config/config_test.go. Tests call config.Load() and assert on LoadResult fields. Update the 8 existing tests to use the new LoadResult return type (e.g., `result, err := config.Load(path); cfgs := result.FreqCfgs`). Run tests -- they must all fail (Load still returns bare map).
GREEN phase -- Modify config/config.go:
1. Add RawRule struct (per D-01):
```go
type RawRule struct {
Port *uint16 `toml:"port"`
Protocol string `toml:"protocol"`
Class string `toml:"class"`
}
```
2. Add Rules field to rawConfig:
```go
type rawConfig struct {
Sounds map[string]SoundOverride `toml:"sounds"`
Rules []RawRule `toml:"rules"`
}
```
3. Add LoadResult struct (per D-13, Claude's Discretion: struct over tuple):
```go
type LoadResult struct {
FreqCfgs map[classify.TrafficClass]synth.FreqConfig
UserRules []classify.Rule
ConfigPath string
}
```
4. Add validateRules function called from validate():
```go
func validateRules(rules []RawRule) error {
validProtocols := map[string]bool{"tcp": true, "udp": true, "icmp": true}
for i, r := range rules {
if r.Protocol == "" {
return fmt.Errorf("config: rules[%d]: protocol is required", i)
}
if !validProtocols[r.Protocol] {
return fmt.Errorf("config: rules[%d]: invalid protocol %q -- valid: tcp, udp, icmp", i, r.Protocol)
}
if r.Class == "" {
return fmt.Errorf("config: rules[%d]: class is required", i)
}
}
return nil
}
```
5. Add convertRules function:
```go
func convertRules(raw []RawRule) []classify.Rule {
result := make([]classify.Rule, len(raw))
for i, r := range raw {
var port uint16
if r.Port != nil {
port = *r.Port
}
result[i] = classify.Rule{
Protocol: r.Protocol,
DstPort: port,
Class: classify.TrafficClass(r.Class),
}
}
return result
}
```
6. Add autoAssignFreq function (per D-07/D-08, using FNV-32a):
```go
import "hash/fnv"
func autoAssignFreq(className string) float64 {
h := fnv.New32a()
h.Write([]byte(className))
const (
baseHz = 1200.0
stepHz = 50.0
numSteps = uint32(24)
)
return baseHz + float64(h.Sum32()%numSteps)*stepHz
}
```
7. Add addAutoFreqEntries function (called AFTER merge, per Pitfall 4):
```go
func addAutoFreqEntries(cfgs map[classify.TrafficClass]synth.FreqConfig, userRules []classify.Rule) {
for _, rule := range userRules {
if _, exists := cfgs[rule.Class]; !exists {
baseHz := autoAssignFreq(string(rule.Class))
cfgs[rule.Class] = synth.FreqConfig{
BaseHz: baseHz,
WaveformType: synth.WaveformSine,
Harmonics: synth.WaveformPresetHarmonics(synth.WaveformSine, baseHz, synth.SampleRate),
Pan: 0.0,
}
}
}
}
```
8. Change Load() signature to return LoadResult:
```go
func Load(configPath string) (LoadResult, error) {
```
- When no config found: return `LoadResult{FreqCfgs: copyDefaults(), ConfigPath: ""}`, nil
- After parseFile + validate + merge: call convertRules, call addAutoFreqEntries, return LoadResult with FreqCfgs, UserRules, and the resolved config path
- Update validate() to also call validateRules(raw.Rules)
- The `merge()` function for unknown class names should NO LONGER print a warning for classes that appear in raw.Rules -- those are legitimate custom classes. Keep the warning only for [sounds.X] where X is neither a built-in class nor a class defined in [[rules]].
9. Update the merge() function: Change the unknown-class warning logic. Instead of always warning on unknown class names in sounds, accept the `userRules []RawRule` as a parameter (or check after conversion). Simplest: after converting rules, pass the set of user-defined class names to merge so it can skip the warning for those. Alternatively, run merge first (with warnings), then let addAutoFreqEntries handle user-defined classes. The warning is acceptable for now -- it only fires for [sounds.X] where X has no matching [[rules]] entry AND is not a built-in class. Keep existing warning behavior, it is harmless.
REFACTOR phase -- Clean up if needed. Ensure all tests pass.
Run `go test ./config/...` -- all tests must pass.
Run `go test ./...` -- full suite must pass (the Load() call site in main.go will break; that is expected and fixed in Plan 02).
</action>
<verify>
<automated>go test ./config/... -v -count=1</automated>
</verify>
<acceptance_criteria>
- config/config.go contains `type RawRule struct` with `Port *uint16`, `Protocol string`, `Class string` fields
- config/config.go contains `type LoadResult struct` with `FreqCfgs`, `UserRules`, `ConfigPath` fields
- config/config.go contains `func Load(configPath string) (LoadResult, error)`
- config/config.go contains `func validateRules(rules []RawRule) error`
- config/config.go contains `func convertRules(raw []RawRule) []classify.Rule`
- config/config.go contains `func autoAssignFreq(className string) float64` with `fnv.New32a()`
- config/config.go contains `func addAutoFreqEntries(`
- config/config.go imports `"hash/fnv"`
- config/config_test.go contains `TestLoadCustomRules`
- config/config_test.go contains `TestAutoFreqAssignment`
- config/config_test.go contains `TestAutoFreqSkipsBuiltins`
- config/config_test.go contains `TestLoadCustomRuleMissingProtocol`
- `go test ./config/... -count=1` exits 0
</acceptance_criteria>
<done>
Load() returns LoadResult with FreqCfgs + UserRules + ConfigPath. TOML [[rules]] blocks parse, validate (protocol required, class required, valid protocols only), and convert to classify.Rule slices. Auto-frequency assignment creates FreqConfig entries for new class names in 1200-2350 Hz range using FNV-32a. Built-in class names from user rules are NOT overwritten. All existing config tests updated and passing. Full config test suite green.
</done>
</task>
</tasks>
<verification>
- `go test ./config/... -v -count=1` passes all tests including new rule-related tests
- `go vet ./config/...` reports no issues
- LoadResult struct is exported and usable from cmd/netsynth package
</verification>
<success_criteria>
- config.Load() returns LoadResult struct (not bare map)
- [[rules]] TOML blocks parse into UserRules field
- Validation catches missing protocol, missing class, invalid protocol
- Auto-freq assigns 1200-2350 Hz for new class names, skips built-ins
- All 8 existing config tests updated and passing
- All new tests passing
</success_criteria>
<output>
After completion, create `.planning/phases/07-custom-rules-and-print-config/07-01-SUMMARY.md`
</output>
.planning/phases/07-custom-rules-and-print-config/07-02-PLAN.md
+444
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@@ -0,0 +1,444 @@
---
phase: 07-custom-rules-and-print-config
plan: 02
type: execute
wave: 2
depends_on:
- "07-01"
files_modified:
- cmd/netsynth/main.go
- cmd/netsynth/main_test.go
- config/config.go
- config/config_test.go
autonomous: true
requirements:
- RULE-02
- CFG-06
must_haves:
truths:
- "User runs netsynth --print-config and sees full effective config as commented TOML on stdout without capture starting"
- "User rules prepend before built-in rules so first-match-wins gives user priority"
- "Print-config output shows source path when config file loaded"
- "Print-config output annotates defaults vs overrides vs auto-assigned"
- "Print-config works without -i flag"
- "Print-config includes [[rules]] section when user rules are present"
artifacts:
- path: "cmd/netsynth/main.go"
provides: "--print-config flag, runPrintConfig(), user rule prepend"
contains: "print-config"
- path: "config/config.go"
provides: "PrintConfig function"
contains: "func PrintConfig("
- path: "cmd/netsynth/main_test.go"
provides: "Tests for --print-config flag"
contains: "TestPrintConfigFlagRegistered"
- path: "config/config_test.go"
provides: "Tests for PrintConfig output"
contains: "TestPrintConfigContainsAllClasses"
key_links:
- from: "cmd/netsynth/main.go"
to: "config/config.go"
via: "runPrintConfig calls config.Load then config.PrintConfig"
pattern: "config\\.PrintConfig"
- from: "cmd/netsynth/main.go"
to: "classify/rules.go"
via: "append(result.UserRules, classify.DefaultRules...)"
pattern: "append.*UserRules.*DefaultRules"
---
<objective>
Wire the LoadResult into main.go (user rules prepend, --print-config flag), implement the PrintConfig output function, and add comprehensive tests for both.
Purpose: Completes RULE-02 (user rules fire before built-ins at the CLI level) and CFG-06 (--print-config UX). This is the final plan for Phase 7 and the v1.1 milestone.
Output: Updated main.go with --print-config and user rule prepending; PrintConfig function in config package; tests in both test files.
</objective>
<execution_context>
@$HOME/.claude/get-shit-done/workflows/execute-plan.md
@$HOME/.claude/get-shit-done/templates/summary.md
</execution_context>
<context>
@.planning/PROJECT.md
@.planning/ROADMAP.md
@.planning/STATE.md
@.planning/phases/07-custom-rules-and-print-config/07-CONTEXT.md
@.planning/phases/07-custom-rules-and-print-config/07-RESEARCH.md
@.planning/phases/07-custom-rules-and-print-config/07-01-SUMMARY.md
@cmd/netsynth/main.go
@cmd/netsynth/main_test.go
@config/config.go
@config/config_test.go
@classify/rules.go
@classify/types.go
@synth/config.go
<interfaces>
<!-- Post-Plan-01 interfaces the executor needs -->
From config/config.go (after Plan 01):
```go
type LoadResult struct {
FreqCfgs map[classify.TrafficClass]synth.FreqConfig
UserRules []classify.Rule
ConfigPath string
}
func Load(configPath string) (LoadResult, error)
```
From classify/rules.go:
```go
var DefaultRules = []Rule{ ... } // 12 rules
func NewClassifier(rules []Rule) *Classifier
```
From synth/config.go:
```go
var ClassFreqConfigs = map[classify.TrafficClass]FreqConfig{ ... } // 14 entries
type FreqConfig struct {
BaseHz float64
Harmonics []HarmonicDef
Pan float64
WaveformType WaveformType
}
```
From classify/types.go:
```go
func AllClasses() []TrafficClass // 14 built-in classes in display order
```
From cmd/netsynth/main.go (current run() flow):
```go
// listIfaces check is first early-exit
// then mutual exclusion check for --read and -i
// then interface-required check
// then BPF filter validation
// then config.Load(configPath)
// then output path resolution
// then runLiveMode or runPcapMode
```
From cmd/netsynth/main_test.go (patterns):
```go
func newTestCmd() *cobra.Command // creates fresh command with all flags
// Tests use rootCmd.SetArgs, rootCmd.Execute(), check err
// PersistentPreRunE wires test vars to package-level vars
```
</interfaces>
</context>
<tasks>
<task type="auto">
<name>Task 1: Wire LoadResult into main.go and add --print-config flag</name>
<files>cmd/netsynth/main.go, cmd/netsynth/main_test.go</files>
<read_first>cmd/netsynth/main.go, cmd/netsynth/main_test.go, config/config.go, classify/rules.go</read_first>
<action>
**main.go changes:**
1. Add package-level var for print-config flag:
```go
var printConfig bool // add alongside existing configPath var
```
2. Register --print-config flag in main() alongside existing flags:
```go
rootCmd.Flags().BoolVar(&printConfig, "print-config", false, "Print effective config as commented TOML and exit")
```
3. In run(), add --print-config check as the SECOND early-exit (after listIfaces, BEFORE the mutual exclusion check). Per Pitfall 2 from research, this must come before the interface-required validation so `netsynth --print-config` works without `-i`:
```go
// --print-config mode (CFG-06, D-09/D-10)
if printConfig {
return runPrintConfig()
}
```
4. Add runPrintConfig function:
```go
func runPrintConfig() error {
result, err := config.Load(configPath)
if err != nil {
return err
}
output := config.PrintConfig(result)
fmt.Print(output)
return nil
}
```
5. Update ALL Load() call sites to use LoadResult (there is one in run()):
```go
// Load config (CFG-01 through CFG-05, D-11: fail fast before capture)
result, err := config.Load(configPath)
if err != nil {
return err
}
```
6. After config load, prepend user rules before creating classifier (per D-04, RULE-02). Update BOTH runLiveMode and runPcapMode. Change their signatures to accept LoadResult instead of bare map:
```go
func runLiveMode(cmd *cobra.Command, result config.LoadResult) error {
// ...
// D-04: user rules prepend before built-ins; first-match-wins
allRules := append(result.UserRules, classify.DefaultRules...)
classifier := classify.NewClassifier(allRules)
// ...use result.FreqCfgs where freqCfgs was used before...
}
```
Do the same for runPcapMode. Update the call sites in run():
```go
if readPath != "" {
return runPcapMode(cmd, result)
}
return runLiveMode(cmd, result)
```
7. In both runLiveMode and runPcapMode, replace `freqCfgs` parameter usage with `result.FreqCfgs` in the encode.RunSynthesis call:
```go
if err := encode.RunSynthesis(collectedSnapshots, outputPath, result.FreqCfgs); err != nil {
```
**main_test.go changes:**
8. Update newTestCmd() to include --print-config flag and --config flag:
```go
var testPrintConfig bool
var testConfigPath string
// ...in flag registration:
rootCmd.Flags().BoolVar(&testPrintConfig, "print-config", false, "Print effective config")
rootCmd.Flags().StringVar(&testConfigPath, "config", "", "Path to TOML config file")
// ...in PersistentPreRunE:
printConfig = testPrintConfig
configPath = testConfigPath
```
9. Add TestPrintConfigFlagRegistered:
```go
func TestPrintConfigFlagRegistered(t *testing.T) {
rootCmd := newTestCmd()
f := rootCmd.Flags().Lookup("print-config")
if f == nil {
t.Fatal("expected --print-config flag to be registered")
}
}
```
10. Add TestPrintConfigNoInterface -- verifies --print-config works without -i:
```go
func TestPrintConfigNoInterface(t *testing.T) {
// Reset globals
ifaceName = ""
listIfaces = false
printConfig = false
configPath = ""
// ... reset all globals
t.Chdir(t.TempDir()) // no netsynth.toml in temp dir
rootCmd := newTestCmd()
rootCmd.SetArgs([]string{"--print-config"})
var outBuf, errBuf bytes.Buffer
rootCmd.SetOut(&outBuf)
rootCmd.SetErr(&errBuf)
err := rootCmd.Execute()
if err != nil {
t.Fatalf("--print-config should not require -i, got error: %v", err)
}
}
```
11. Add TestPrintConfigWithConfigFile -- verifies print-config loads and displays a user config:
```go
func TestPrintConfigWithConfigFile(t *testing.T) {
// Create temp TOML with an override
dir := t.TempDir()
tomlPath := filepath.Join(dir, "test.toml")
os.WriteFile(tomlPath, []byte("[sounds.ICMP]\nfrequency = 100.0\n"), 0644)
// Reset globals
// ...
rootCmd := newTestCmd()
rootCmd.SetArgs([]string{"--print-config", "--config", tomlPath})
var outBuf, errBuf bytes.Buffer
rootCmd.SetOut(&outBuf)
rootCmd.SetErr(&errBuf)
// Capture stdout by redirecting os.Stdout temporarily, OR
// check that no error occurred (PrintConfig writes to os.Stdout via fmt.Print)
err := rootCmd.Execute()
if err != nil {
t.Fatalf("--print-config with --config should succeed, got: %v", err)
}
}
```
</action>
<verify>
<automated>go test ./cmd/netsynth/... -v -count=1 && go test ./config/... -count=1</automated>
</verify>
<acceptance_criteria>
- cmd/netsynth/main.go contains `var printConfig bool`
- cmd/netsynth/main.go contains `"print-config"` flag registration
- cmd/netsynth/main.go contains `if printConfig {` BEFORE the interface-required check
- cmd/netsynth/main.go contains `func runPrintConfig() error`
- cmd/netsynth/main.go contains `append(result.UserRules, classify.DefaultRules...)`
- cmd/netsynth/main.go contains `func runLiveMode(cmd *cobra.Command, result config.LoadResult)`
- cmd/netsynth/main.go contains `func runPcapMode(cmd *cobra.Command, result config.LoadResult)`
- cmd/netsynth/main_test.go contains `TestPrintConfigFlagRegistered`
- cmd/netsynth/main_test.go contains `TestPrintConfigNoInterface`
- cmd/netsynth/main_test.go contains `"print-config"` in newTestCmd()
- cmd/netsynth/main_test.go contains `"config"` flag in newTestCmd()
- `go test ./cmd/netsynth/... -count=1` exits 0
- `go test ./config/... -count=1` exits 0
</acceptance_criteria>
<done>
--print-config flag registered, checked before interface validation (no -i required). runPrintConfig calls config.Load then config.PrintConfig, prints to stdout, exits. User rules prepended in both runLiveMode and runPcapMode via append(result.UserRules, classify.DefaultRules...). All existing and new tests pass.
</done>
</task>
<task type="auto">
<name>Task 2: Implement PrintConfig output function with comment annotations</name>
<files>config/config.go, config/config_test.go</files>
<read_first>config/config.go, config/config_test.go, synth/config.go, classify/types.go, classify/rules.go</read_first>
<action>
Add the PrintConfig function to config/config.go and tests to config/config_test.go.
**config/config.go additions:**
1. Add an `AutoClasses` field to LoadResult to track which classes were auto-assigned (per Open Question 1 from research):
```go
type LoadResult struct {
FreqCfgs map[classify.TrafficClass]synth.FreqConfig
UserRules []classify.Rule
ConfigPath string
AutoClasses map[classify.TrafficClass]bool // classes with auto-assigned frequencies
}
```
Update addAutoFreqEntries to populate this map. Also update Load() to initialize the map.
2. Add the PrintConfig function. Use manual string building with fmt.Fprintf to a strings.Builder (per D-09, D-10, D-11). The function signature:
```go
func PrintConfig(result LoadResult) string
```
3. Output format (per Pattern 5 from research):
```
# NetSynth effective configuration
# Config source: <path or "none (using defaults)">
# Generated: <date>
```
Then, if result.UserRules is non-empty, emit the [[rules]] section:
```
# Classification rules (user-defined, prepended before built-in rules)
[[rules]]
port = 8080
protocol = "tcp"
class = "MyApp"
```
For each user rule, emit a `[[rules]]` block. If DstPort == 0, omit the `port` line (per D-02 semantics).
Then emit the [sounds] section. Iterate in a deterministic order: first AllClasses() (14 built-in classes in display order), then any user-defined classes sorted alphabetically. For each class:
```
# <ClassName> -- <BaseHz> Hz (<annotation>)
[sounds.<ClassName>]
frequency = <BaseHz>
waveform = "<waveform_string>"
```
Where annotation is:
- `default` -- class is in synth.ClassFreqConfigs AND FreqCfgs entry matches the default BaseHz and WaveformType
- `override` -- class is in synth.ClassFreqConfigs BUT FreqCfgs entry differs from default (user changed it)
- `auto-assigned` -- class is in result.AutoClasses
4. Add waveformString helper to convert WaveformType back to string:
```go
func waveformString(wt synth.WaveformType) string {
switch wt {
case synth.WaveformSine:
return "sine"
case synth.WaveformSquare:
return "square"
case synth.WaveformSawtooth:
return "sawtooth"
case synth.WaveformTriangle:
return "triangle"
default:
return "custom"
}
}
```
5. For deterministic ordering of user-defined classes (not in AllClasses()), collect them, sort by string value, and append after built-in classes.
**config/config_test.go additions:**
6. TestPrintConfigContainsAllClasses: Create a LoadResult with defaults (no overrides, no user rules). Call PrintConfig. Assert output contains all 14 class names from classify.AllClasses(): "ICMP", "DNS", "HTTPS", "HTTP", "SSH", "SMTP", "NTP", "DHCP", "other-TCP", "other-UDP", "unknown-1", "unknown-2", "unknown-3", "unknown-4".
7. TestPrintConfigSourcePath: Create LoadResult with ConfigPath="/home/user/netsynth.toml". Assert output contains `# Config source: /home/user/netsynth.toml`.
8. TestPrintConfigNoSourcePath: Create LoadResult with ConfigPath="". Assert output contains `# Config source: none`.
9. TestPrintConfigContainsRules: Create LoadResult with UserRules containing one rule (Protocol="tcp", DstPort=8080, Class="MyApp"). Assert output contains `[[rules]]`, `port = 8080`, `protocol = "tcp"`, `class = "MyApp"`.
10. TestPrintConfigRuleNoPort: Create LoadResult with UserRules containing rule with DstPort=0. Assert output does NOT contain `port =` for that rule.
11. TestPrintConfigDefaultAnnotation: Create LoadResult with defaults. Assert output contains `(default)` annotation for ICMP entry.
12. TestPrintConfigOverrideAnnotation: Create LoadResult where ICMP has BaseHz=100.0 (differs from default 65.0). Assert output contains `(override)` for ICMP.
13. TestPrintConfigAutoAssignedAnnotation: Create LoadResult with AutoClasses map containing "GameServer"=true. Assert output contains `(auto-assigned)` for GameServer entry.
</action>
<verify>
<automated>go test ./config/... -v -count=1 -run "PrintConfig" && go test ./... -count=1</automated>
</verify>
<acceptance_criteria>
- config/config.go contains `func PrintConfig(result LoadResult) string`
- config/config.go contains `func waveformString(wt synth.WaveformType) string`
- config/config.go LoadResult struct contains `AutoClasses map[classify.TrafficClass]bool`
- config/config.go PrintConfig output contains `# NetSynth effective configuration`
- config/config.go PrintConfig output contains `# Config source:`
- config/config_test.go contains `TestPrintConfigContainsAllClasses`
- config/config_test.go contains `TestPrintConfigSourcePath`
- config/config_test.go contains `TestPrintConfigContainsRules`
- config/config_test.go contains `TestPrintConfigDefaultAnnotation`
- config/config_test.go contains `TestPrintConfigOverrideAnnotation`
- config/config_test.go contains `TestPrintConfigAutoAssignedAnnotation`
- `go test ./... -count=1` exits 0 (full suite green)
</acceptance_criteria>
<done>
PrintConfig produces commented TOML output with: header (source path, date), [[rules]] section for user rules (port omitted when 0), [sounds.*] section for all classes in deterministic order. Each sound entry annotated as (default), (override), or (auto-assigned). Full test suite green including all existing tests.
</done>
</task>
</tasks>
<verification>
- `go test ./... -count=1` -- full suite green
- `go vet ./...` -- no issues
- `netsynth --print-config` outputs commented TOML to stdout (manual check)
- `netsynth --print-config --config <file>` shows overrides annotated as such
</verification>
<success_criteria>
- --print-config flag works without -i, outputs to stdout, exits without capture
- User rules prepended before DefaultRules in both live and pcap modes
- PrintConfig output contains all 14 built-in classes plus any user-defined classes
- Comment annotations correctly distinguish default / override / auto-assigned
- Source path shown in header when config loaded
- [[rules]] section present in output when user rules exist
- Full go test suite passes
</success_criteria>
<output>
After completion, create `.planning/phases/07-custom-rules-and-print-config/07-02-SUMMARY.md`
</output>