Pbeslin/parse mcp history

[pbeslin-gg]

Context

New option in ggshield ai discover: --history allows parsing and sending MCP calls found in agent transcripts, in order to obtain insight on calls made before installing the hook.
⚠️ Requires py-gitguardian changes: GitGuardian/py-gitguardian#173

What has been done

• ggshield ai discover takes a new optional flag option: --history. Not passing the flag results in the same behavior as before.
• Passing the flag runs the history parsing in addition to the default behavior
• Transcript files are parsed for all supported agents: Claude Code, Copilot, Cursor
  • Claude Code and VSCode Chat store them in .jsonl files
  • Cursor uses a database
• Each agent implements its own way of iterating over the past events
• All activities are sent to the GitGuardian API in batches (500). The GitGuardian API handles idempotency.

Validation

1. Wire py-gitguardian correct version (feat: bulk mcp activity route py-gitguardian#173)
2. Wire the local GitGuardian API with the new route (if not deployed yet)
3. Run ggshield ai discover --history
4. Go to the Agentic AI dashboard

PR check list

• As much as possible, the changes include tests (unit and/or functional)
• If the changes affect the end user (new feature, behavior change, bug fix) then the PR has a changelog entry (see doc/dev/getting-started.md). If the changes do not affect the end user, then the skip-changelog label has been added to the PR.