[alexcastgonz (pcbeingused333)]

Part of #333 (gap 3: MCP tools in Copilot CLI/App; gap 1 stays open, so this does not close the issue).

Copilot CLI and App identify MCP calls through tool.execution_start.data.mcpServerName, while context-engineering checks recognize the mcp_ tool-name prefix. The parser discarded the server metadata, so MCP usage was counted as missing.

Normalize server-backed tool names to mcp_<server>_<tool> when recording tools, removing the raw name previously recorded by assistant tool requests so each MCP tool is counted once. Built-in names and already-prefixed MCP names retain their existing representation. Increment the parsed-cache version so existing sessions are reparsed with the corrected MCP signal. This change covers gap 3 only; the custom-agent signal in gap 1 remains separate.

Testing

Add a regression covering Copilot CLI and App through both synchronous and streaming parsers. It checks normalized MCP names, unchanged built-ins, empty server metadata, and one fewer missing context-engineering signal compared with the same requests without MCP usage.

npm test -- src/core/parser-vscode-cli.test.ts: 2 failing without the parser change, 20/20 passing with it. The fixture includes both assistant tool requests and execution events, checks a single normalized name, and verifies that the dashboard extracts the github server ID.

npm run check passed typecheck, lint, spellcheck, knip and lockfile-lint. The full suite finished with 3684 passed, 5 skipped and 8 failures in GitHub App analytics and Xcode tests because the sqlite3 executable is missing from the test environment. git diff --check passed.

AI assistance: this change and its regression tests were prepared using Codex.

[alexcastgonz (pcbeingused333)]

Friendly ping: this one is approved and CI is in place — happy to rebase or adjust anything if that helps get it merged. Thanks!