Hot-reload and multi-entry load_hermes_dotenv can hit the same UTF-32
file repeatedly; gate the refuse-to-mangle warning on a module-level
seen-set (house style: _WARNED_KEYS sibling) so logs are not spammed.
Notepad "Unicode" saves write UTF-16 with a BOM. The sanitizer decoded
those bytes as utf-8-sig with errors=replace, glued U+FFFD onto the first
key name, stripped NULs, and rewrote the mangled content permanently.
Sniff leading BOMs before any text decode (UTF-32 before UTF-16, because
UTF-32-LE's BOM starts with UTF-16-LE's FF FE). Decode UTF-16 correctly
and rewrite as clean UTF-8. Refuse UTF-32 (leave untouched + warning).
After errors=replace, do not persist a first line that starts with U+FFFD.
Does not touch _load_dotenv_with_fallback (#65124's surface).
Remove unused imports (F401) and duplicate/shadowed import
redefinitions (F811) across the codebase using ruff's safe
autofixes. No behavioral changes -- imports only.
- ~1400 safe autofixes applied across 644 files (net -1072 lines)
- __init__.py re-exports preserved (excluded from F401 removal so
public re-export surfaces stay intact)
- Re-exports that are imported or monkeypatched by tests but look
unused in their defining module are kept with explicit # noqa:
F401 (gateway/run.py load_dotenv; run_agent re-exports from
agent.message_sanitization, agent.context_compressor,
agent.retry_utils, agent.prompt_builder, agent.process_bootstrap,
agent.codex_responses_adapter)
- Unsafe F841 (unused-variable) fixes deliberately skipped -- those
can change behavior when the RHS has side effects
- ruff lints remain disabled in pyproject.toml (only PLW1514 is
selected); this is a one-time cleanup, not a config change
Verification:
- python -m compileall: clean
- pytest --collect-only: all 27161 tests collect (zero import errors)
- core entry points import clean (run_agent, model_tools, cli,
toolsets, hermes_state, batch_runner, gateway)
- static scan: every name any test imports directly from an edited
module still resolves
Null bytes in API key values (introduced by copy-paste) crash
os.environ[k] = v with ValueError: embedded null byte, preventing
hermes from starting at all.
Hermes startup entrypoints now load ~/.hermes/.env and project fallback env files with user config taking precedence over stale shell-exported values. This makes model/provider/base URL changes in .env actually take effect after restarting Hermes. Adds a shared env loader plus regression coverage, and reproduces the original bug case where OPENAI_BASE_URL and HERMES_INFERENCE_PROVIDER remained stuck on old shell values before import.
