[FEATURE] Central sync across devices (Azure-backed) + natural-language “Ask about usage”

[jongio]

Is your feature request related to a problem? Please describe.
I use VS Code + Copilot on multiple machines/profiles/windows, and today token usage is effectively fragmented. I can’t easily answer “what did I use this week overall?” or compare usage across projects because the data lives only on each machine’s local session logs.

Describe the solution you'd like
Add an opt-in “central sync” mode that:

• Syncs/aggregates usage from all VS Code instances into a user-configured Azure-backed store (user-owned).
• Uses Azure AD auth by default (no secrets required), with an optional advanced mode for a storage shared key stored securely.
• Updates the status bar and details view using centralized aggregates (with filters like time range, model, workspace/repo, machine).
• Adds a command like “Ask about usage” that lets me ask natural-language questions (e.g., “Which models used the most tokens last week?”) and get answers based on the synced data.

Describe alternatives you've considered

• Manually exporting data from each machine and merging it (too tedious, error-prone).
• Keeping everything local and only showing per-machine stats (doesn’t solve cross-device aggregation).
• Using a non-Azure backend (e.g., local network share, third-party analytics service) — less ideal for orgs that standardize on Azure and/or require user-owned data stores.

Use case

• Individual developers with multiple machines want a single, accurate aggregate view of usage.
• Leads/teams (where appropriate) want to understand trends by project/repo/model over time.
• Anyone who wants quick answers (“top models”, “trend over time”, “which workspace consumes most”) without manually slicing charts/tables.

Mockups/Screenshots (if applicable)
Ideas:

• Details panel: add a “Data source: Local / Central” indicator and filter chips (Time range, Model, Workspace/Repo, Machine).
• Status bar: show central totals by default with a quick scope toggle (All machines / This machine / Current workspace).
• “Ask about usage” flow: show the interpreted query + a small results table before the final summary.

Priority
How important is this feature to you?

• Critical - I can't use the extension effectively without this
• High - This would significantly improve my experience
• Medium - This would be a nice addition
• Low - This is just a suggestion

Implementation considerations

• Performance: avoid scanning/parsing all local logs every refresh; use incremental sync + batched writes; prefer rollups/aggregates for fast UI queries.
• Cross-platform: must work on Windows/macOS/Linux, and handle multiple VS Code profiles/windows.
• Auth/policy: some orgs block storage account shared-key/local auth; the default should work with Entra ID RBAC and degrade gracefully if provisioning is blocked.
• Privacy: avoid sending raw workspace paths; treat machine identifiers as pseudonymous; require explicit confirmation before sending any query results to the language model for summarization; allow users to exclude machine-level breakdowns.

Additional context
This would unlock:

• Accurate weekly/monthly totals across devices
• Top models/workspaces/repos with filtering
• A friendly “ask” experience for insights, with clear transparency and privacy guardrails

[github-actions]

Tagging @rajbos for notifications

[jongio]

PR coming soon.

[rajbos]

@jongio , I refactored quite some stuff in the meanwhile, just released a new version.
Check the new cached data I use for storage and retrieval, probably good to build on that and send that data to a central location and then rehydrate from that as well.

[jongio]

Sounds good. I have it working locally and will push the refactor with cache so you can try it out soon. Give me a couple of days.

[rajbos]

PR merged! I will make some more updates to make it fit and make it findable in the extension, will add a new release with this soon!

[rajbos]

Released in v0.0.13, closing this issue.

Thanks @jongio!