Closes part of #2790 (Phase A). The Python total floor at 86% (set in
workspace/pytest.ini, issue #1817) averages over ~6000 lines, so a
single MCP-critical file could regress to ~50% with no CI complaint as
long as other modules compensate. This is the same distribution gap
that #1823 closed Go-side: total floor passes while a critical handler
sits at 0%.
Added gates for these five files (per-file floor 75%):
- workspace/a2a_mcp_server.py — MCP dispatcher (PR #2766 / #2771)
- workspace/mcp_cli.py — molecule-mcp standalone CLI entry
- workspace/a2a_tools.py — workspace-scoped tool implementations
- workspace/inbox.py — multi-workspace inbox + per-workspace cursors
- workspace/platform_auth.py — per-workspace token resolver
These handle multi-tenant routing, auth tokens, and inbox dispatch.
Risk shape mirrors Go-side tokens*/secrets* — a 0%/50% file here is
exactly where the PR #2766 dispatcher bug class slips through without
a structural test.
Floor 75% is strictly additive — current actuals 80-96% (measured
2026-05-04). No existing PR fails. Ratchet plan in COVERAGE_FLOOR.md
target 90% by 2026-08-04.
Implementation: pytest already writes .coverage; new step emits a JSON
view scoped to the critical files via `coverage json --include="*name"`,
then jq extracts each file's percent_covered. Exact key match by
basename so workspace/builtin_tools/a2a_tools.py (a different 100%
file) doesn't shadow workspace/a2a_tools.py.
Verified locally with the actual coverage data:
- floor=75 → 0 failures (matches current state)
- floor=81 → 1 failure (a2a_tools.py at 80%) — proves the gate trips
Pairs with PR #2791 (Phase B — schema↔dispatcher AST drift gate). Phase
C (molecule-mcp e2e harness) remains the largest piece in #2790.
YAML validated locally before commit per
feedback_validate_yaml_before_commit.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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