Files
hermes-agent/gateway
Teknium1 e262a738a1 feat(codex-runtime): add /codex-runtime slash command (CLI + gateway)
User-facing toggle for the optional codex app-server runtime. Follows the
'Adding a Slash Command (All Platforms)' pattern from AGENTS.md exactly:
single CommandDef in the central registry → CLI handler → gateway handler
→ running-agent guard → all surfaces (autocomplete, /help, Telegram menu,
Slack subcommands) update automatically.

Surface:
    /codex-runtime                    — show current state + codex CLI status
    /codex-runtime auto               — Hermes default runtime
    /codex-runtime codex_app_server   — codex subprocess runtime
    /codex-runtime on / off           — synonyms

Files changed:

  hermes_cli/codex_runtime_switch.py (new):
    Pure-Python state machine shared by CLI and gateway. Parse args,
    read/write model.openai_runtime in the config dict, gate enabling
    behind a codex --version check (don't let users opt in to a runtime
    they have no binary for; print npm install hint instead).
    Returns a CodexRuntimeStatus dataclass that callers render however
    suits their surface.

  hermes_cli/commands.py:
    Single CommandDef entry, no aliases (codex-runtime is its own thing).

  cli.py:
    Dispatch in process_command() + _handle_codex_runtime() handler that
    delegates to the shared module and renders results via _cprint.

  gateway/run.py:
    Dispatch in _handle_message() + _handle_codex_runtime_command() that
    returns a string (gateway sends as message). On a successful change
    that requires a new session, _evict_cached_agent() forces the next
    inbound message to construct a fresh AIAgent with the new api_mode —
    avoids prompt-cache invalidation mid-session.

  gateway/run.py running-agent guard:
    /codex-runtime joins /model in the early-intercept block so a runtime
    flip mid-turn can't split a turn across two transports.

Tests:
  tests/hermes_cli/test_codex_runtime_switch.py — 25 tests covering the
  state machine: arg parsing (10 cases incl. case-insensitive and
  synonyms), reading current runtime (5 cases incl. malformed configs),
  writing runtime (3 cases), apply() entry point covering read-only,
  no-op, codex-missing-blocked, codex-present-success, disable-no-binary-check,
  and persist-failure paths (8 cases). All green.

Adjacent test suites confirm no regressions:
  - tests/hermes_cli/test_commands.py + test_codex_runtime_switch.py:
    167/167 green
  - tests/agent/transports/: 283/283 green when combined with prior commits

Still missing: plugin migration helper, docs page, live e2e test gated on
codex binary. Followup commits.
2026-05-12 10:26:26 -07:00
..