semi implemented and features implemented save checkpoint

docs/features/unchecked/cli/cli-with-plugin-based-command-modules.md

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+# CLI with Plugin-Based Command Modules
+
+## Module
+Cli
+
+## Status
+IMPLEMENTED
+
+## Description
+Modular CLI with ICliCommandModule interface, dynamic module loader, and multiple plugin command modules covering VEX, verdict, timestamp, symbols, AOC, and delta signatures.
+
+## Implementation Details
+- **Plugin System**: `src/Cli/StellaOps.Cli/Plugins/` -- plugin infrastructure with ICliCommandModule interface
+- **Plugin Directory**: `src/Cli/plugins/` -- plugin implementations
+- **Module Loader Tests**: `src/Cli/__Tests/StellaOps.Cli.Tests/Plugins/CliCommandModuleLoaderTests.cs`
+- **Plugin Guard Tests**: `src/Cli/__Tests/StellaOps.Cli.Tests/Plugins/RestartOnlyCliPluginGuardTests.cs`
+- **Built-in plugin modules**:
+  - VEX plugin -- VEX generation and verification commands
+  - Verdict plugin -- verdict inspection and verification
+  - Timestamp plugin -- RFC 3161 timestamp operations
+  - Symbols plugin -- symbol table operations
+  - AOC plugin -- attestation of compliance
+  - DeltaSig plugin -- delta signature operations (`src/Cli/StellaOps.Cli/Commands/DeltaSig/`)
+
+## E2E Test Plan
+- [ ] Verify all built-in plugins load at startup
+- [ ] Verify VEX plugin commands are available (stella vex gen, stella vex verify)
+- [ ] Verify verdict plugin commands work (stella verdict show)
+- [ ] Verify timestamp plugin commands work (stella ts verify)
+- [ ] Verify symbols plugin commands work (stella symbols ingest)
+- [ ] Verify DeltaSig plugin commands work (stella deltasig create, verify)
+- [ ] Verify plugin guard prevents unauthorized module loading
+- [ ] Verify graceful degradation when optional plugin is missing