# 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:** v0.1 complete — ready for next milestone planning

## Current Position

Milestone: v0.2 NcProgramManager
Phase: 3 of 4 (08-license-integration) — Not started
Plan: Not started
Status: Ready to plan Phase 08
Last activity: 2026-05-17 — Phase 07 complete, transitioned to Phase 08

Progress:
- Milestone v0.1: [██████████] 100% (complete)
- Milestone v0.2: [█████░░░░░] 50%
- Phase 08: [░░░░░░░░░░] 0%

## Loop Position

Current loop state:
```
PLAN ──▶ APPLY ──▶ UNIFY
  ✓        ✓        ✓     [Loop complete — ready for next PLAN]
```

## 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
- `FanucProgramManager.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)

## CLI Args (v0.1)
- `-manufacturer=fanuc|heidenhain|siemens|mitsubishi` (default: fanuc)
- `-username=` (Heidenhain/Siemens/Mitsubishi)
- `-password=` (Heidenhain/Siemens/Mitsubishi)

## Accumulated Context

### Decisions
- .NET 4.7.2 locked — max compatibility
- RSA asymmetric offline licensing: private key vendor-only, public key embedded in binary
- PublicKeyXml = PLACEHOLDER until Phase 09 generates real key pair
- `RSACryptoServiceProvider` + `SHA256CryptoServiceProvider` (not HashAlgorithmName) — .NET 4.7.2 compat
- Constructor injection pattern: internal ctor accepts key XML — testable without Windows WMI
- 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
- License wiring into Program.cs — Phase 08 target
- License generator tool — Phase 09 target
- Real RSA key pair — Phase 09 output; copy PublicKeyXml into LicenseValidator.cs
- Heidenhain: `ReadActiveProgramAsync` / `SelectMainProgram` not implemented
- Siemens: same as Heidenhain
- Build + integration not verifiable on Linux (fwlib32 Windows-only)
- MachineFingerprint WMI — code-review verified, needs real Windows hardware test

### Blockers/Concerns
None — Phase 08 can start.

## Session Continuity

Last session: 2026-05-17
Stopped at: Phase 07 complete (UNIFY done)
Next action: /paul:plan for Phase 08 (license-integration)
Resume file: .paul/ROADMAP.md

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*STATE.md — Updated after every significant action*