test-impact

# Test Impact Identifies the minimal test set affected by changing a function or module, using codemap-py static analysis — no test execution needed. Result: a ready-to-run `pytest` command covering only impacted tests. Two input modes: - **Function-level** (`module::symbol`) — BFS over the reverse call graph; finds every test calling the changed function, directly or transitively. Includes tests mocking the symbol (`mock_patches`). - **Module-level** (bare `module`) — BFS over the reverse import graph; finds every test importing the module through any chain. Includes tests mocking any symbol in the module. `not_covered`: dynamic dispatch, hook callbacks, string-dispatch callers — same blind spot as `fn-blast`. Surface as a caveat, do not silently drop it. NOT for: finding all callers of a function (use `$codemap-py:query-code fn-blast <module::symbol>`); querying module deps or blast radius (use `$codemap-py:query-code`); running/executing tests (identified here, not executed). ## Runtime note Codex has no `bin/` PATH entry and no `$CLAUDE_PLUGIN_ROOT`-equivalent environment variable. Resolve this skill's installed plugin-root path once, substitute it for `PLUGIN_ROOT` below, and keep it in reasoning — shell state does not persist across tool calls. ## Inputs `<qname> [--no-mocks]`: - `qname` — `module::symbol` (function-level) or a bare dotted module (module-level) - `--no-mocks` — exclude mock-only test files (no call/import path) - Omitted → ask in chat whic...