feat: interactive model picker with Discord Select UI and reasoning selector (#3710)

[simplenamebox-ops]

Summary

Adds /models command with Discord Select menu UI and /model-status command. Addresses #3710.

New in latest commit: Gateway-level model override — /models no longer writes to config.yaml. Instead, it sets an in-memory override that persists across /new and session resets, clearing only on gateway restart. This restores the session-scoped switching behavior that was lost when /model was removed in 9783c9d.

How model switching works

Event	Active model	Config.yaml
Gateway start	Loaded from config	Unchanged
/models pick GLM-5	GLM-5 (in memory)	Unchanged
/new or session reset	GLM-5 (still in memory)	Unchanged
Gateway restart	Reloaded from config	Unchanged

Config.yaml keeps the user's hard default. The picker switches the active model without touching it.

/model-status output

Model Status

Default (config.yaml): openai-codex/gpt-5.4
Active: ollama-cloud/glm-5 (via /models picker)
Last reply: glm-5
Cron: glm-5 (BTC Prediction - 4 hourly)

Key differences from #3718

• Discord Select menus (native dropdowns) instead of text/button flow
• Gateway-level override — /models does NOT write config.yaml
• Reasoning effort selector — none/low/medium/high/xhigh (persists to config)
• /model-status — shows Default + Active + Last Reply + Cron
• Guild-level slash sync — commands appear instantly
• models.yaml catalog — user-curated per-provider model lists

Architecture

set_session_model()          ← /models picker sets this
    ↓
_resolve_gateway_model()     ← checks override first, then env, then config
    ↓
_resolve_runtime_agent_kwargs()  ← resolves provider from override
    ↓
AIAgent(model=..., **runtime)    ← uses active model

Files changed

File	What
gateway/platforms/discord.py	ModelPickerView + UI components + gateway override on submit
gateway/run.py	set/get/clear_session_model(), model status, session info override label
hermes_cli/commands.py	2 CommandDef entries: models, model-status
hermes_cli/model_picker_config.py	Catalog loader, provider config checker, formatting utils

Test plan

• /models opens interactive picker with provider → model → reasoning dropdowns
• Submit sets gateway override (config.yaml untouched)
• Model persists across /new and session resets
• Model reverts to config default on gateway restart
• /model-status shows Default, Active (with source), Last Reply, Cron
• Fallback indicator shows when primary model failed
• Reasoning effort persists to config.yaml
• Guild slash commands sync instantly on startup

🤖 Generated with Claude Code

[alt-glitch]

Related to #5742 (merged) which implemented an interactive model picker for Telegram and Discord. This PR adds Select menu UI and gateway-level override on top of that.

[alt-glitch]

Related to #5742 (merged) which implemented an interactive model picker for Telegram and Discord.

[teknium1]

Thanks for the detailed picker implementation. This is now implemented on current main via the later merged PR #5742; the linked #3710 has also been closed as implemented.

• 5a2cf280a shipped the Discord discord.ui.View Select-menu provider → model picker, plus the Telegram counterpart.
• plugins/platforms/discord/adapter.py:5877 sends ModelPickerView; ModelPickerView builds the provider/model Select flow at :7180 and switches through its callback at :7364.
• gateway/slash_commands.py:1480 invokes that picker for bare /model on capable gateway adapters and persists the resulting per-session override at :1620.
• The later implementation intentionally scopes model selection per session. tests/gateway/test_session_model_reset.py:70 verifies /new clears only the initiating session's override, avoiding the PR's proposed process-global override affecting other gateway conversations.

This is an automated hermes-sweeper review.