fix(cli): run computer use post-setup when enabling tool (#22776)

[teknium1]

Salvages #22776 onto current main. Closes a silent-no-op bug in the hermes tools enable flow.

The problem

Computer Use is a "no-key" provider — there are no env vars to ask the user about. So when a returning user toggled it on via hermes tools, _toolset_needs_configuration_prompt() returned False (correctly: nothing to configure), the provider-setup flow was skipped, and the post_setup hook that runs install_cua_driver() never fired. Result: cua-driver stayed uninstalled, but the toolset showed as enabled.

The fix

Three layered changes in hermes_cli/tools_config.py:

1. _POST_SETUP_INSTALLED registry — explicit opt-in dict mapping post_setup keys to a "is the side-effect already satisfied?" predicate. Only entries here gate the configuration prompt; other post_setup hooks (kittentts, piper, agent_browser, etc.) keep their existing behaviour. Adding "cua_driver": lambda: bool(shutil.which(_cua_driver_cmd())).

2. _toolset_needs_configuration_prompt() extension — when any visible provider has a registered post_setup install-state check that hasn't been satisfied, force the configuration flow so _configure_provider invokes _run_post_setup and the install actually runs.

3. HERMES_CUA_DRIVER_CMD override threaded through — new _cua_driver_cmd() helper honours non-empty overrides (blank ones fall back to "cua-driver"). All call sites (install_cua_driver, _run_cua_driver_installer, _POST_SETUP_INSTALLED predicate) consult it. Tests pin the version-probe to the override so CI matches real-host behaviour.

Validation

• Single commit cherry-picked from fix: run computer use post-setup when enabling tool #22776, clean auto-merge with the recently merged fix(cli): pre-check CUA release asset for Intel macOS before install (#24530) #30168 (Intel macOS precheck) which also touched install_cua_driver().
• Targeted: 90/90 passing across tests/hermes_cli/test_tools_config.py (78) + tests/hermes_cli/test_install_cua_driver.py (12 from fix(cli): pre-check CUA release asset for Intel macOS before install (#24530) #30168).
• 5 new regression tests added: blank-override-fallback, custom-command-found, post-setup-pending-forces-prompt, post-setup-installed-skips-prompt, version-probe-honours-override.
• Added 178342791+sgtworkman@users.noreply.github.com → sgtworkman to AUTHOR_MAP (separate follow-up commit).

Credit @sgtworkman (PR #22776).

Closes #22776.

Infographic

[github-actions]

🔎 Lint report: hermes/hermes-02d0efaa vs origin/main

ruff

Total: 0 on HEAD, 0 on base (➖ 0)

🆕 New issues: none

✅ Fixed issues: none

Unchanged: 0 pre-existing issues carried over.

ty (type checker)

Total: 9012 on HEAD, 9012 on base (➖ 0)

🆕 New issues: none

✅ Fixed issues: none

Unchanged: 4763 pre-existing issues carried over.

Diagnostics are surfaced as warnings — this check never fails the build.