feat(directives): harvest 5 directives from docs/guide_testing.md (sandbox overview, live_gui session-scoped, defer-not-catch, narrow tests, AST method visibility)

conductor/directives/no_real_io_during_tests/meta.md

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+# no_real_io_during_tests
+
+## v1
+
+**Why this iteration:** Lifted verbatim from `docs/guide_testing.md:9-16 (Overview)`.
+**Source:** `docs/guide_testing.md:9-16 (Overview)`
+**Lifted:** 2026-07-02 (Phase A expansion harvest; user directive 2026-07-02)

conductor/directives/no_real_io_during_tests/v1.md

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+## The 4 test infrastructure principles
+
+1. **No real I/O during tests** — every test gets a sandboxed workspace via the `isolate_workspace` autouse fixture.
+2. **No real AI calls** — tests use mock providers, reset session state, and never hit the network.
+3. **GUI tests launch a real app** — the `live_gui` session fixture starts `sloppy.py --enable-test-hooks` so integration tests can drive the actual app via the Hook API.
+4. **Tests are categorized by marker** — unit, integration, strict, clean_install, docker — so CI can opt in to expensive tests.
+
+The autouse `isolate_workspace` fixture (1 of 7 conftest fixtures) gives every test a fresh, isolated workspace so it cannot pollute the user's real `manual_slop.toml`, `presets.toml`, etc. The session-scoped `live_gui` fixture starts `sloppy.py --enable-test-hooks` once per session so integration tests can drive the actual app via the Hook API.
+
+All test-generated artifacts (logs, temporary workspaces, mock outputs) MUST be written to `tests/artifacts/` or `tests/logs/` (gitignored).