nc_program_manager/.paul/STATE.md

# Project State

## Project Reference

See: .paul/PROJECT.md (updated 2026-05-17)

**Core value:** Machinists transfer CNC programs to/from any controller without manual steps or internet
**Current focus:** v0.2 complete — offline license system fully shipped

## Current Position

Milestone: v0.2 NcProgramManager — COMPLETE
Phase: 4 of 4 (09-license-generator) — Complete
Plan: 09-01 complete
Status: Milestone v0.2 complete. Ready to plan next milestone or ship.
Last activity: 2026-05-17 — Phase 09 license-generator complete (UNIFY done)

Progress:
- Milestone v0.1: [██████████] 100% (complete)
- Milestone v0.2: [██████████] 100% (complete)

## Loop Position

```
PLAN ──▶ APPLY ──▶ UNIFY
  ✓        ✓        ✓     [Loop complete — milestone v0.2 done]
```

## What Was Built (v0.1 Multi-CN Release)

### Phase 1 — CNC Abstraction
- Namespace: `Fanuc_integration.Cnc.*` → `FanucProgramManager.Cnc.*` (29 files)
- `IFocasDialect` extended: `UploadStart`/`DownloadStart` accept `short fileType`
- `IFanucMachine` created: extends `ICncMachine` with tool offset + work zero R/W
- `CncManufacturer` enum: Fanuc, Heidenhain, Siemens, Mitsubishi
- All 29 `Cnc/**/*.cs` files added to csproj

### Phase 2 — Heidenhain LSV2
- `HeidenhainConnectionConfig` — IP, port 19000, credentials, timeout
- `Lsv2Client` — TCP framing, CRC-16/CCITT, login (SELECT+LOG_IN), ReceiveFile/SendFile
- `HeidenhainMachine : ICncMachine` — RunGuardedAsync pattern, state machine

### Phase 3 — Siemens + Mitsubishi FTP
- `SiemensConnectionConfig` / `SiemensFtpClient` / `SiemensMachine : ICncMachine`
- `MitsubishiConnectionConfig` / `MitsubishiFtpClient` / `MitsubishiMachine : ICncMachine`

### Phase 4 — Wiring
- `CncMachineFactory` — creates right `ICncMachine` from `InputArgs`
- `InputArgs` — added `manufacturer`, `username`, `password` fields
- `Program.cs` — full rewrite using `ICncMachine`; Fanuc 3-file via `IFanucMachine` cast

### Phase 5 — NC Validator
- `ValidationSeverity` / `ValidationError` / `ValidationResult` model types
- `INcProgramValidator` + `NcProgramValidator` (5 universal + per-manufacturer rules)
- Validator injected into all 4 machine classes; upload blocked on Error severity
- `NcProgramValidatorTests` — 30+ NUnit tests

### Test Infrastructure
- `NcProgramManager.Tests/` — NUnit 3.13.3 + Moq 4.18.4, .NET 4.7.2
- `FtpServerStub` + `Lsv2ServerStub` — in-process TCP stubs
- Unit + integration tests; Fanuc FOCAS tests `[Ignore]`d (Windows-only DLL)

## What Was Built (v0.2 NcProgramManager — complete)

### Phase 06 — Rename Cleanup
- Namespace: `FanucProgramManager.*` → `NcProgramManager.*` (all files)
- Project renamed, test folder renamed, dead `FANUCMachine.cs` deleted

### Phase 07 — License Core
- `IMachineFingerprint` / `ILicenseValidator` interfaces
- `MachineFingerprint` — WMI CPU/BIOS fingerprint
- `LicenseFile.TryRead` — reads `.lic` file, returns base64 signature
- `LicenseValidator.Validate` — RSA-SHA256 verify
- `LicenseValidatorTests` — 6 unit tests (testable via internal ctor injection)

### Phase 08 — License Integration
- `Program.cs` — RSA check wired at startup; `checkLicense` deleted; `license.lic` next to EXE
- `InputArgs.cs` — `-chiave=` field removed

### Phase 09 — License Generator
- `LicenseGenerator` standalone console tool (separate repo: `ssh://git@3nt-git.duckdns.org:222/davide.trentin/license-generator.git`)
- Commands: `keygen` (RSA 2048-bit pair), `fingerprint` (WMI, Windows), `sign` (RSA-SHA256 → .lic)
- Real public key embedded in `Licensing/LicenseValidator.cs` (PLACEHOLDER removed)
- `private.key.xml` at `~/Documents/mine/c#/LicenseGenerator/` (gitignored — keep secure)

## CLI Args (current)
- `-manufacturer=fanuc|heidenhain|siemens|mitsubishi` (default: fanuc)
- `-azione=` — action (Scarica/Invia/etc.)
- `-ip=` — CNC IP
- `-porta=` — port
- `-username=` (Heidenhain/Siemens/Mitsubishi)
- `-password=` (Heidenhain/Siemens/Mitsubishi)
- License: place `license.lic` next to the EXE (no CLI arg)

## Accumulated Context

### Decisions
- .NET 4.7.2 locked — max compatibility
- RSA asymmetric offline licensing: private key vendor-only, public key embedded in binary
- `license.lic` always at `AppDomain.CurrentDomain.BaseDirectory` — no CLI override
- `RSACryptoServiceProvider` + `SHA256CryptoServiceProvider` (not HashAlgorithmName) — .NET 4.7.2 compat
- Constructor injection pattern: internal ctor accepts key XML — testable without Windows WMI
- LicenseGenerator: standalone separate repo — vendor tool, never shipped to customers
- Heidenhain: LSV2 port 19000, needs real hardware testing
- Siemens: FTP `/_N_MPF_DIR/`, needs Sinumerik FTP option enabled on machine
- `#` = Warning in Fanuc/Mitsubishi — macro variable indicator

### Deferred Issues
- `AesCrypt.cs` dead code — remove in future cleanup phase
- Heidenhain: `ReadActiveProgramAsync` / `SelectMainProgram` not implemented
- Siemens: same as Heidenhain
- Build + integration not verifiable on Linux (fwlib32 Windows-only)
- MachineFingerprint WMI + full license flow — needs real Windows hardware test
- `private.key.xml` owned by root — run `sudo chown $USER ~/Documents/mine/c#/LicenseGenerator/private.key.xml`

### Blockers/Concerns
None — v0.2 milestone complete.

### Git State
Last commit (NcProgramManager): see `git log --oneline`
LicenseGenerator repo: commit `2ef68dd` — feat: initial LicenseGenerator
Branch: main

## Session Continuity

Last session: 2026-05-17
Stopped at: v0.2 milestone complete (Phase 09 UNIFY done)
Next action: Plan next milestone or ship v0.2
Resume file: .paul/ROADMAP.md

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*STATE.md — Updated after every significant action*