feat(mcp): add read_live_metrics tool + bump joserfc (Dependabot #25)#40
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Reads the Phantom Studio plugin's 2 Hz JSON metrics snapshots from PHANTOM_METRICS_DIR (default ~/Library/PhantomStudio/metrics on macOS) and returns the newest or a specific instance's snapshot with age and staleness. Does its own realpath containment since it bypasses load_audio's sandbox: instance ids are pattern-validated and symlinks resolving outside the metrics dir are never followed. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01PVuJ8YPjPJRvGTkT2mnZM4
Dependabot alert #25 (CVE-2026-48990, medium): b64=false RFC7797 JWS payloads could bypass JWSRegistry payload-size limits during deserialization. Transitive via authlib; patched from 1.6.7. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01PVuJ8YPjPJRvGTkT2mnZM4
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What
read_live_metrics(18 tools now): reads the Phantom Studio plugin's 2 Hz Phantom Link metrics snapshots fromPHANTOM_METRICS_DIR(default~/Library/PhantomStudio/metricson macOS) and returns the newest — or a specific instance's — snapshot with age and staleness. This is the grounding tool for the Phantom Studio AI companion (Phase 1).joserfc1.6.4 → 1.7.2 for GHSA-wphv-vfrh-23q5 / CVE-2026-48990 (Dependabot alert docs: update README with new tools, CLI commands, and config options #25, medium — RFC7797b64=falseJWS payload-size-limit bypass).Security notes
read_live_metricsbypassesload_audio's sandbox, so it does its own containment: the metrics dir is realpath-resolved, instance ids are pattern-validated ([A-Za-z0-9_-]+), and symlinks resolving outside the dir are never followed. Musician-friendlyPhantomErrors throughout.Tests
15 new tests in
tests/test_live_metrics.py(fresh/stale snapshots, newest-wins, specific instance, missing/empty dir, traversal + symlink-escape rejection, corrupt JSON, MCP surface via in-memory client). Full suite: 984 passed, 44 skipped. Error-schema consistency test extended for the new tool.🤖 Generated with Claude Code
https://claude.ai/code/session_01PVuJ8YPjPJRvGTkT2mnZM4