feat(cli): add explicit self-update command and update notices

[TheodoreSpeaks]

Summary

• Add sim update for verified global npm, pnpm, Bun, and Yarn Classic installations, preserving the release channel, refusing downgrades, and surfacing installation failures.
• Point daily update notices to sim update. Normal commands continue without installing updates.

Type of Change

• Feature

Testing

CLI suite: 1,087 passed, 1 skipped. Build, type-check, repository lint, block-registry validation, full repository audits, and docs-manifest check passed. Manually verified local command help and the update notice.

Checklist

• Code follows project style guidelines
• Self-reviewed my changes
• Tests added/updated and passing
• No new warnings introduced
• I confirm that I have read and agree to the terms outlined in the Contributor License Agreement (CLA)

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1 Skipped Deployment

Project	Deployment	Actions	Updated
docs	Skipped		Sep 11, 2026 1:52am UTC

[greptile-apps]

Confidence Score: 5/5

The PR appears safe to merge; no actionable new failure remains, and all previous findings are resolved.

Summary

• Detects and verifies the active global npm, pnpm, Bun, or Yarn Classic installation.
• Resolves and validates the target release before installing an exact version.
• Refuses downgrades and concurrent updates while sanitizing expected CLI failures.
• Adds command, unit, bundled-process, and documentation coverage.
• The latest revision preserves the original registry or installer failure when lock cleanup also fails.

Diagram

%%{init: {'theme': 'neutral'}}%%
flowchart TD
  Command[sim update] --> Detect[Detect selected package manager]
  Detect --> Verify[Verify active global installation]
  Verify --> Lock[Acquire installation lock]
  Lock --> Resolve[Resolve channel release]
  Resolve --> Compare{Compare versions}
  Compare -->|Older| Refuse[Refuse downgrade]
  Compare -->|Equivalent| Current[Report already current]
  Compare -->|Newer| Install[Install exact version]
  Install --> Validate[Verify installed manifest]
  Refuse --> Cleanup[Release lock]
  Current --> Cleanup
  Validate --> Cleanup
  Cleanup --> Result[Report success or preserved failure]

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_{Reviews (3) · Last reviewed commit: "fix(cli): preserve update failures durin..."}

[TheodoreSpeaks]

@greptile

[TheodoreSpeaks]

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[TheodoreSpeaks]

@greptile

[TheodoreSpeaks]

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