hermes-bsd/website/docs/developer-guide/provider-runtime.md

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---
sidebar_position: 4
title: "Provider Runtime Resolution"
description: "How Hermes resolves providers, credentials, API modes, and auxiliary models at runtime"
---
# Provider Runtime Resolution
Hermes has a shared provider runtime resolver used across:
- CLI
- gateway
- cron jobs
- ACP
- auxiliary model calls
Primary implementation:
- `hermes_cli/runtime_provider.py` — credential resolution, `_resolve_custom_runtime()`
- `hermes_cli/auth.py` — provider registry, `resolve_provider()`
- `hermes_cli/model_switch.py` — shared `/model` switch pipeline (CLI + gateway)
- `agent/auxiliary_client.py` — auxiliary model routing
feat(providers): make all 33 providers pluggable under plugins/model-providers/ Every provider profile is now a self-contained plugin under plugins/model-providers/<name>/, mirroring the plugins/platforms/ pattern established for IRC and Teams. The ProviderProfile ABC stays in providers/; the per-provider profile data moves out. - plugins/model-providers/<name>/__init__.py calls register_provider() - plugins/model-providers/<name>/plugin.yaml declares kind: model-provider - providers/__init__.py._discover_providers() lazily scans bundled plugins then $HERMES_HOME/plugins/model-providers/<name>/ (user override path) - User plugins with the same name override bundled ones (last-writer-wins in register_provider) - Legacy providers/<name>.py layout still supported for back-compat with out-of-tree editable installs - Hermes PluginManager: new kind=model-provider; skipped like memory plugins (providers/ discovery owns them); standalone plugins with register_provider+ProviderProfile in their __init__.py auto-coerce to this kind (same heuristic as memory providers) - skip_names extended to include 'model-providers' so the general PluginManager doesn't double-scan the category - 4 new tests in tests/providers/test_plugin_discovery.py covering bundled discovery, user override, and general-loader isolation - Docs updated: website/docs/developer-guide/adding-providers.md, provider-runtime.md, providers/README.md, plugins/model-providers/README.md No API break: auth.py / config.py / doctor.py / models.py / runtime_provider.py / model_metadata.py / auxiliary_client.py / chat_completions.py / run_agent.py all still consume providers via get_provider_profile() / list_providers() — they just now see plugin-discovered entries instead of pkgutil-iterated ones. Third parties can now drop a single directory into ~/.hermes/plugins/model-providers/<name>/ to add or override an inference provider without touching the repo.
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- `providers/` — ABC + registry entry points (`ProviderProfile`, `register_provider`, `get_provider_profile`, `list_providers`)
- `plugins/model-providers/<name>/` — per-provider plugins (bundled) that declare `api_mode`, `base_url`, `env_vars`, `fallback_models` and register themselves into the registry on first access. User plugins at `$HERMES_HOME/plugins/model-providers/<name>/` override bundled ones of the same name.
feat: provider modules — ProviderProfile ABC, 33 providers, fetch_models, transport single-path Introduces providers/ package — single source of truth for every inference provider. Adding a simple api-key provider now requires one providers/<name>.py file with zero edits anywhere else. What this PR ships: - providers/ package (ProviderProfile ABC + 33 profiles across 4 api_modes) - ProviderProfile declarative fields: name, api_mode, aliases, display_name, env_vars, base_url, models_url, auth_type, fallback_models, hostname, default_headers, fixed_temperature, default_max_tokens, default_aux_model - 4 overridable hooks: prepare_messages, build_extra_body, build_api_kwargs_extras, fetch_models - chat_completions.build_kwargs: profile path via _build_kwargs_from_profile, legacy flag path retained for lmstudio/tencent-tokenhub (which have session-aware reasoning probing that doesn't map cleanly to hooks yet) - run_agent.py: profile path for all registered providers; legacy path variable scoping fixed (all flags defined before branching) - Auto-wires: auth.PROVIDER_REGISTRY, models.CANONICAL_PROVIDERS, doctor health checks, config.OPTIONAL_ENV_VARS, model_metadata._URL_TO_PROVIDER - GeminiProfile: thinking_config translation (native + openai-compat nested) - New tests/providers/ (79 tests covering profile declarations, transport parity, hook overrides, e2e kwargs assembly) Deltas vs original PR (salvaged onto current main): - Added profiles: alibaba-coding-plan, azure-foundry, minimax-oauth (were added to main since original PR) - Skipped profiles: lmstudio, tencent-tokenhub stay on legacy path (their reasoning_effort probing has no clean hook equivalent yet) - Removed lmstudio alias from custom profile (it's a separate provider now) - Skipped openrouter/custom from PROVIDER_REGISTRY auto-extension (resolve_provider special-cases them; adding breaks runtime resolution) - runtime_provider: profile.api_mode only as fallback when URL detection finds nothing (was breaking minimax /v1 override) - Preserved main's legacy-path improvements: deepseek reasoning_content preserve, gemini Gemma skip, OpenRouter response caching, Anthropic 1M beta recovery, etc. - Kept agent/copilot_acp_client.py in place (rejected PR's relocation — main has 7 fixes landed since; relocation would revert them) - _API_KEY_PROVIDER_AUX_MODELS alias kept for backward compat with existing test imports Co-authored-by: kshitijk4poor <82637225+kshitijk4poor@users.noreply.github.com> Closes #14418
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feat(providers): make all 33 providers pluggable under plugins/model-providers/ Every provider profile is now a self-contained plugin under plugins/model-providers/<name>/, mirroring the plugins/platforms/ pattern established for IRC and Teams. The ProviderProfile ABC stays in providers/; the per-provider profile data moves out. - plugins/model-providers/<name>/__init__.py calls register_provider() - plugins/model-providers/<name>/plugin.yaml declares kind: model-provider - providers/__init__.py._discover_providers() lazily scans bundled plugins then $HERMES_HOME/plugins/model-providers/<name>/ (user override path) - User plugins with the same name override bundled ones (last-writer-wins in register_provider) - Legacy providers/<name>.py layout still supported for back-compat with out-of-tree editable installs - Hermes PluginManager: new kind=model-provider; skipped like memory plugins (providers/ discovery owns them); standalone plugins with register_provider+ProviderProfile in their __init__.py auto-coerce to this kind (same heuristic as memory providers) - skip_names extended to include 'model-providers' so the general PluginManager doesn't double-scan the category - 4 new tests in tests/providers/test_plugin_discovery.py covering bundled discovery, user override, and general-loader isolation - Docs updated: website/docs/developer-guide/adding-providers.md, provider-runtime.md, providers/README.md, plugins/model-providers/README.md No API break: auth.py / config.py / doctor.py / models.py / runtime_provider.py / model_metadata.py / auxiliary_client.py / chat_completions.py / run_agent.py all still consume providers via get_provider_profile() / list_providers() — they just now see plugin-discovered entries instead of pkgutil-iterated ones. Third parties can now drop a single directory into ~/.hermes/plugins/model-providers/<name>/ to add or override an inference provider without touching the repo.
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`get_provider_profile()` in `providers/` returns a `ProviderProfile` for a given provider id. `runtime_provider.py` calls this at resolution time to get the canonical `base_url`, `env_vars` priority list, `api_mode`, and `fallback_models` without needing to duplicate that data in multiple files. Adding a new plugin under `plugins/model-providers/<your-provider>/` (or `$HERMES_HOME/plugins/model-providers/<your-provider>/`) that calls `register_provider()` is enough for `runtime_provider.py` to pick it up — no branch needed in the resolver itself.
docs: pluggable surfaces coverage — model-provider guide, full plugin map, opt-in fix (#20749) * docs(providers): add model-provider-plugin authoring guide + fix stale refs New docs: - website/docs/developer-guide/model-provider-plugin.md — full authoring guide (directory layout, minimal example, ProviderProfile fields, overridable hooks, user overrides, api_mode selection, auth types, testing, pip distribution) - Wired into website/sidebars.ts under 'Extending' - Cross-references added in: - guides/build-a-hermes-plugin.md (tip block) - developer-guide/adding-providers.md - developer-guide/provider-runtime.md User guide: - user-guide/features/plugins.md: Plugin types table grows from 3 to 4 with 'Model providers' row Stale comment cleanup (providers/*.py → plugins/model-providers/<name>/): - hermes_cli/main.py:_is_profile_api_key_provider docstring - hermes_cli/doctor.py:_build_apikey_providers_list docstring - hermes_cli/auth.py: PROVIDER_REGISTRY + alias auto-extension comments - hermes_cli/models.py: CANONICAL_PROVIDERS auto-extension comment AGENTS.md: - Project-structure tree: added plugins/model-providers/ row - New section: 'Model-provider plugins' explaining discovery, override semantics, PluginManager integration, kind auto-coerce heuristic Verified: docusaurus build succeeds, new page renders, all 3 cross-links resolve. 347/347 targeted tests pass (tests/providers/, tests/hermes_cli/test_plugins.py, tests/hermes_cli/test_runtime_provider_resolution.py, tests/run_agent/test_provider_parity.py). * docs(plugins): add 'pluggable interfaces at a glance' maps to plugins.md + build-a-hermes-plugin Devs landing on either the user-guide plugin page or the build-a-plugin guide now get an upfront table of every distinct pluggable surface with a link to the right authoring doc. Previously they'd have to read the full general-plugin guide to discover that model providers / platforms / memory / context engines are separate systems. user-guide/features/plugins.md: - New 'Pluggable interfaces — where to go for each' section below the existing 4-kinds table - 10 rows covering every register_* surface (tool, hook, slash command, CLI subcommand, skill, model provider, platform, memory, context engine, image-gen) - Explicit note: TTS/STT are NOT plugin-extensible yet — documented with a pointer to the current config.yaml 'command providers' pattern and a note that register_tts_provider()/register_stt_provider() may come later guides/build-a-hermes-plugin.md: - New :::info 'Not sure which guide you need?' map at the top so devs see all pluggable interfaces before investing in this 737-line general-plugin walkthrough - Existing bottom :::tip expanded to include platform adapters alongside model/memory/context plugins Verified: - All 8 cross-doc links in the new plugins.md table resolve in a docusaurus build (SUCCESS, no new broken links) - TTS link corrected (features/voice → features/tts; latter exists) - Pre-existing broken links/anchors (cron-script-only, llms.txt, adding-platform-adapters#step-by-step-checklist) are unchanged * docs(plugins): correct TTS/STT pluggability \u2014 they ARE plugins (command-providers) Previous commit incorrectly said TTS/STT 'aren't plugin-extensible'. They are, via the config-driven command-provider pattern \u2014 any CLI that reads text and writes audio (or vice versa for STT) is automatically a plugin with zero Python. The tts.md docs cover this extensively and I missed it. plugins.md: - TTS row: 'Config-driven (not a Python plugin)', points at tts.md#custom-command-providers - STT row: points at tts.md#voice-message-transcription-stt (STT docs live in tts.md despite the filename) - Expanded note: TTS/STT use config-driven shell-command templates as their plugin surface (full tts.providers.<name> registry for TTS; HERMES_LOCAL_STT_COMMAND escape hatch for STT) - Any CLI that reads/writes files is automatically a plugin \u2014 no Python register_* API needed - Future register_tts_provider()/register_stt_provider() hooks mentioned as nice-to-have for SDK/streaming cases, not as the primary story build-a-hermes-plugin.md: - Same map update: TTS/STT rows explicit, footer note corrected Verified: - tts.md anchors (custom-command-providers, voice-message-transcription-stt) exist and resolve in docusaurus build (SUCCESS, no new broken links) * docs(plugins): expand pluggable interfaces table with MCP / event hooks / shell hooks / skill taps Broadened the scope beyond Python register_* hooks. Hermes has MULTIPLE plugin-style extension surfaces; they're now all in one table instead of being scattered across feature docs. Added rows for: - **MCP servers** — config.yaml mcp_servers.<name> auto-registers external tools from any MCP server. Huge extensibility surface, previously not linked from the plugin map. - **Gateway event hooks** — drop HOOK.yaml + handler.py into ~/.hermes/hooks/<name>/ to fire on gateway:startup, session:*, agent:*, command:* events. Separate from Python plugin hooks. - **Shell hooks** — hooks: block in config.yaml runs shell commands on events (notifications, auditing, etc.). - **Skill sources (taps)** — hermes skills tap add <repo> to pull in new skill registries beyond the built-in sources. Both docs updated: - user-guide/features/plugins.md: table column renamed to 'How' (mixes Python API + config-driven + drop-in-dir surfaces accurately) - guides/build-a-hermes-plugin.md: :::info map at top mirrors the new surfaces with a forward-link to the consolidated table Note block rewritten: instead of singling out TTS/STT as the 'different style' exception, now honestly describes that Hermes deliberately supports three plugin styles — Python APIs, config-driven commands, and drop-in manifest directories — and devs should pick the one that fits their integration. Not included (considered and rejected): - Transport layer (register_transport) — internal, not user-facing - Tool-call parsers — internal, VLLM phase-2 thing - Cloud browser providers — hardcoded registry, not drop-in yet - Terminal backends — hardcoded if/elif, not drop-in yet - Skill sources (the ABC) — hardcoded list, only taps are user-extensible Verified: - All 5 new anchors resolve (gateway-event-hooks, shell-hooks, skills-hub, custom-command-providers, voice-message-transcription-stt) - Docusaurus build SUCCESS, zero new broken links - Same 3 pre-existing broken links on main (cron-script-only, llms.txt, adding-platform-adapters#step-by-step-checklist) * docs(plugins): cover every pluggable surface in both the overview and how-to Both plugins.md and build-a-hermes-plugin.md now cover every extension surface end-to-end \u2014 general plugin APIs, specialized plugin types, config-driven surfaces \u2014 with concrete authoring patterns for each. plugins.md: - 'What plugins can do' table grows from 9 rows (general ctx.register_* only) to 14 rows covering register_platform, register_image_gen_provider, register_context_engine, MemoryProvider subclass, register_provider (model). Each row links to its full authoring guide. - New 'Plugin sub-categories' section under Plugin Discovery explains how plugins/platforms/, plugins/image_gen/, plugins/memory/, plugins/context_engine/, plugins/model-providers/ are routed to different loaders \u2014 PluginManager vs the per-category own-loader systems. - Explicit mention of user-override semantics at ~/.hermes/plugins/model-providers/ and ~/.hermes/plugins/memory/. build-a-hermes-plugin.md: - New '## Specialized plugin types' section (5 sub-sections): - Model provider plugins \u2014 ProviderProfile + plugin.yaml example, auto-wiring summary, link to full guide - Platform plugins \u2014 BasePlatformAdapter + register_platform() skeleton - Memory provider plugins \u2014 MemoryProvider subclass example - Context engine plugins \u2014 ContextEngine subclass example - Image-generation backends \u2014 ImageGenProvider + kind: backend example - New '## Non-Python extension surfaces' section (5 sub-sections): - MCP servers \u2014 config.yaml mcp_servers.<name> example - Gateway event hooks \u2014 HOOK.yaml + handler.py example - Shell hooks \u2014 hooks: block in config.yaml example - Skill sources (taps) \u2014 hermes skills tap add example - TTS / STT command templates \u2014 tts.providers.<name> with type: command - Distribute via pip / NixOS promoted from ### to ## (they were orphaned after the reorganization) Each specialized / non-Python section has a concrete, copy-pasteable example plus a 'Full guide:' link to the authoritative doc. Devs arriving at the build-a-hermes-plugin guide now see every extension surface at their disposal, not just the general tool/hook/slash-command surface. Verified: - Docusaurus build SUCCESS, zero new broken links - All new cross-links (developer-guide/model-provider-plugin, adding-platform-adapters, memory-provider-plugin, context-engine-plugin, user-guide/features/mcp, skills#skills-hub, hooks#gateway-event-hooks, hooks#shell-hooks, tts#custom-command-providers, tts#voice-message-transcription-stt) resolve - Same 3 pre-existing broken links on main (cron-script-only, llms.txt, adding-platform-adapters#step-by-step-checklist) * docs(plugins): fix opt-in inconsistency — not every plugin is gated The 'Every plugin is disabled by default' statement was wrong. Several plugin categories intentionally bypass plugins.enabled: - Bundled platform plugins (IRC, Teams) auto-load so shipped gateway channels are available out of the box. Activation per channel is via gateway.platforms.<name>.enabled. - Bundled backends (plugins/image_gen/*) auto-load so the default backend 'just works'. Selection via <category>.provider config. - Memory providers are all discovered; one is active via memory.provider. - Context engines are all discovered; one is active via context.engine. - Model providers: all 33 discovered at first get_provider_profile(); user picks via --provider / config. The plugins.enabled allow-list specifically gates: - Standalone plugins (general tools/hooks/slash commands) - User-installed backends - User-installed platforms (third-party gateway adapters) - Pip entry-point backends Which matches the actual code in hermes_cli/plugins.py:737 where the bundled+backend/platform check bypasses the allow-list. Rewrote '## Plugins are opt-in' to: - Retitle to 'Plugins are opt-in (with a few exceptions)' - Narrow opening claim to 'General plugins and user-installed backends are disabled by default' - Added 'What the allow-list does NOT gate' subsection with a full table of which bypass the gate and how they're activated instead - Fixed migration section wording (bundled platform/backend plugins never needed grandfathering) Verified: docusaurus build SUCCESS, zero new broken links.
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If you are trying to add a new first-class inference provider, read [Adding Providers](./adding-providers.md) and the [Model Provider Plugin guide](./model-provider-plugin.md) alongside this page.
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## Resolution precedence
At a high level, provider resolution uses:
1. explicit CLI/runtime request
2. `config.yaml` model/provider config
3. environment variables
4. provider-specific defaults or auto resolution
That ordering matters because Hermes treats the saved model/provider choice as the source of truth for normal runs. This prevents a stale shell export from silently overriding the endpoint a user last selected in `hermes model`.
## Providers
Current provider families include:
- AI Gateway (Vercel)
- OpenRouter
- Nous Portal
- OpenAI Codex
docs: fix 40+ discrepancies between documentation and codebase (#5818) Comprehensive audit of all ~100 doc pages against the actual code, fixing: Reference docs: - HERMES_API_TIMEOUT default 900 -> 1800 (env-vars) - TERMINAL_DOCKER_IMAGE default python:3.11 -> nikolaik/python-nodejs (env-vars) - compression.summary_model default shown as gemini -> actually empty string (env-vars) - Add missing GOOGLE_API_KEY, GEMINI_API_KEY, GEMINI_BASE_URL env vars (env-vars) - Add missing /branch (/fork) slash command (slash-commands) - Fix hermes-cli tool count 39 -> 38 (toolsets-reference) - Fix hermes-api-server drop list to include text_to_speech (toolsets-reference) - Fix total tool count 47 -> 48, standalone 14 -> 15 (tools-reference) User guide: - web_extract.timeout default 30 -> 360 (configuration) - Remove display.theme_mode (not implemented in code) (configuration) - Remove display.background_process_notifications (not in defaults) (configuration) - Browser inactivity timeout 300/5min -> 120/2min (browser) - Screenshot path browser_screenshots -> cache/screenshots (browser) - batch_runner default model claude-sonnet-4-20250514 -> claude-sonnet-4.6 - Add minimax to TTS provider list (voice-mode) - Remove credential_pool_strategies from auth.json example (credential-pools) - Fix Slack token path platforms/slack/ -> root ~/.hermes/ (slack) - Fix Matrix store path for new installs (matrix) - Fix WhatsApp session path for new installs (whatsapp) - Fix HomeAssistant config from gateway.json to config.yaml (homeassistant) - Fix WeCom gateway start command (wecom) Developer guide: - Fix tool/toolset counts in architecture overview - Update line counts: main.py ~5500, setup.py ~3100, run.py ~7500, mcp_tool ~2200 - Replace nonexistent agent/memory_store.py with memory_manager.py + memory_provider.py - Update _discover_tools() list: remove honcho_tools, add skill_manager_tool - Add session_search and delegate_task to intercepted tools list (agent-loop) - Fix budget warning: two-tier system (70% caution, 90% warning) (agent-loop) - Fix gateway auth order (per-platform first, global last) (gateway-internals) - Fix email_adapter.py -> email.py, add webhook.py + api_server.py (gateway-internals) - Add 7 missing providers to provider-runtime list Other: - Add Docker --cap-add entries to security doc - Fix Python version 3.10+ -> 3.11+ (contributing) - Fix AGENTS.md discovery claim (not hierarchical walk) (tips) - Fix cron 'add' -> canonical 'create' (cron-internals) - Add pre_api_request/post_api_request hooks to plugin guide - Add Google/Gemini provider to providers page - Clarify OPENAI_BASE_URL deprecation (providers)
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- Copilot / Copilot ACP
- Anthropic (native)
docs: fix 40+ discrepancies between documentation and codebase (#5818) Comprehensive audit of all ~100 doc pages against the actual code, fixing: Reference docs: - HERMES_API_TIMEOUT default 900 -> 1800 (env-vars) - TERMINAL_DOCKER_IMAGE default python:3.11 -> nikolaik/python-nodejs (env-vars) - compression.summary_model default shown as gemini -> actually empty string (env-vars) - Add missing GOOGLE_API_KEY, GEMINI_API_KEY, GEMINI_BASE_URL env vars (env-vars) - Add missing /branch (/fork) slash command (slash-commands) - Fix hermes-cli tool count 39 -> 38 (toolsets-reference) - Fix hermes-api-server drop list to include text_to_speech (toolsets-reference) - Fix total tool count 47 -> 48, standalone 14 -> 15 (tools-reference) User guide: - web_extract.timeout default 30 -> 360 (configuration) - Remove display.theme_mode (not implemented in code) (configuration) - Remove display.background_process_notifications (not in defaults) (configuration) - Browser inactivity timeout 300/5min -> 120/2min (browser) - Screenshot path browser_screenshots -> cache/screenshots (browser) - batch_runner default model claude-sonnet-4-20250514 -> claude-sonnet-4.6 - Add minimax to TTS provider list (voice-mode) - Remove credential_pool_strategies from auth.json example (credential-pools) - Fix Slack token path platforms/slack/ -> root ~/.hermes/ (slack) - Fix Matrix store path for new installs (matrix) - Fix WhatsApp session path for new installs (whatsapp) - Fix HomeAssistant config from gateway.json to config.yaml (homeassistant) - Fix WeCom gateway start command (wecom) Developer guide: - Fix tool/toolset counts in architecture overview - Update line counts: main.py ~5500, setup.py ~3100, run.py ~7500, mcp_tool ~2200 - Replace nonexistent agent/memory_store.py with memory_manager.py + memory_provider.py - Update _discover_tools() list: remove honcho_tools, add skill_manager_tool - Add session_search and delegate_task to intercepted tools list (agent-loop) - Fix budget warning: two-tier system (70% caution, 90% warning) (agent-loop) - Fix gateway auth order (per-platform first, global last) (gateway-internals) - Fix email_adapter.py -> email.py, add webhook.py + api_server.py (gateway-internals) - Add 7 missing providers to provider-runtime list Other: - Add Docker --cap-add entries to security doc - Fix Python version 3.10+ -> 3.11+ (contributing) - Fix AGENTS.md discovery claim (not hierarchical walk) (tips) - Fix cron 'add' -> canonical 'create' (cron-internals) - Add pre_api_request/post_api_request hooks to plugin guide - Add Google/Gemini provider to providers page - Clarify OPENAI_BASE_URL deprecation (providers)
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- Google / Gemini
- Alibaba / DashScope
- DeepSeek
- Z.AI
- Kimi / Moonshot
- MiniMax
- MiniMax China
docs: fix 40+ discrepancies between documentation and codebase (#5818) Comprehensive audit of all ~100 doc pages against the actual code, fixing: Reference docs: - HERMES_API_TIMEOUT default 900 -> 1800 (env-vars) - TERMINAL_DOCKER_IMAGE default python:3.11 -> nikolaik/python-nodejs (env-vars) - compression.summary_model default shown as gemini -> actually empty string (env-vars) - Add missing GOOGLE_API_KEY, GEMINI_API_KEY, GEMINI_BASE_URL env vars (env-vars) - Add missing /branch (/fork) slash command (slash-commands) - Fix hermes-cli tool count 39 -> 38 (toolsets-reference) - Fix hermes-api-server drop list to include text_to_speech (toolsets-reference) - Fix total tool count 47 -> 48, standalone 14 -> 15 (tools-reference) User guide: - web_extract.timeout default 30 -> 360 (configuration) - Remove display.theme_mode (not implemented in code) (configuration) - Remove display.background_process_notifications (not in defaults) (configuration) - Browser inactivity timeout 300/5min -> 120/2min (browser) - Screenshot path browser_screenshots -> cache/screenshots (browser) - batch_runner default model claude-sonnet-4-20250514 -> claude-sonnet-4.6 - Add minimax to TTS provider list (voice-mode) - Remove credential_pool_strategies from auth.json example (credential-pools) - Fix Slack token path platforms/slack/ -> root ~/.hermes/ (slack) - Fix Matrix store path for new installs (matrix) - Fix WhatsApp session path for new installs (whatsapp) - Fix HomeAssistant config from gateway.json to config.yaml (homeassistant) - Fix WeCom gateway start command (wecom) Developer guide: - Fix tool/toolset counts in architecture overview - Update line counts: main.py ~5500, setup.py ~3100, run.py ~7500, mcp_tool ~2200 - Replace nonexistent agent/memory_store.py with memory_manager.py + memory_provider.py - Update _discover_tools() list: remove honcho_tools, add skill_manager_tool - Add session_search and delegate_task to intercepted tools list (agent-loop) - Fix budget warning: two-tier system (70% caution, 90% warning) (agent-loop) - Fix gateway auth order (per-platform first, global last) (gateway-internals) - Fix email_adapter.py -> email.py, add webhook.py + api_server.py (gateway-internals) - Add 7 missing providers to provider-runtime list Other: - Add Docker --cap-add entries to security doc - Fix Python version 3.10+ -> 3.11+ (contributing) - Fix AGENTS.md discovery claim (not hierarchical walk) (tips) - Fix cron 'add' -> canonical 'create' (cron-internals) - Add pre_api_request/post_api_request hooks to plugin guide - Add Google/Gemini provider to providers page - Clarify OPENAI_BASE_URL deprecation (providers)
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- Kilo Code
- Hugging Face
- OpenCode Zen / OpenCode Go
- Custom (`provider: custom`) — first-class provider for any OpenAI-compatible endpoint
- Named custom providers (`custom_providers` list in config.yaml)
## Output of runtime resolution
The runtime resolver returns data such as:
- `provider`
- `api_mode`
- `base_url`
- `api_key`
- `source`
- provider-specific metadata like expiry/refresh info
## Why this matters
This resolver is the main reason Hermes can share auth/runtime logic between:
- `hermes chat`
- gateway message handling
- cron jobs running in fresh sessions
- ACP editor sessions
- auxiliary model tasks
## AI Gateway
Set `AI_GATEWAY_API_KEY` in `~/.hermes/.env` and run with `--provider ai-gateway`. Hermes fetches available models from the gateway's `/models` endpoint, filtering to language models with tool-use support.
## OpenRouter, AI Gateway, and custom OpenAI-compatible base URLs
Hermes contains logic to avoid leaking the wrong API key to a custom endpoint when multiple provider keys exist (e.g. `OPENROUTER_API_KEY`, `AI_GATEWAY_API_KEY`, and `OPENAI_API_KEY`).
Each provider's API key is scoped to its own base URL:
- `OPENROUTER_API_KEY` is only sent to `openrouter.ai` endpoints
- `AI_GATEWAY_API_KEY` is only sent to `ai-gateway.vercel.sh` endpoints
- `OPENAI_API_KEY` is used for custom endpoints and as a fallback
Hermes also distinguishes between:
- a real custom endpoint selected by the user
- the OpenRouter fallback path used when no custom endpoint is configured
That distinction is especially important for:
- local model servers
- non-OpenRouter/non-AI Gateway OpenAI-compatible APIs
- switching providers without re-running setup
- config-saved custom endpoints that should keep working even when `OPENAI_BASE_URL` is not exported in the current shell
## Native Anthropic path
Anthropic is not just "via OpenRouter" anymore.
When provider resolution selects `anthropic`, Hermes uses:
- `api_mode = anthropic_messages`
- the native Anthropic Messages API
- `agent/anthropic_adapter.py` for translation
Credential resolution for native Anthropic now prefers refreshable Claude Code credentials over copied env tokens when both are present. In practice that means:
- Claude Code credential files are treated as the preferred source when they include refreshable auth
- manual `ANTHROPIC_TOKEN` / `CLAUDE_CODE_OAUTH_TOKEN` values still work as explicit overrides
- Hermes preflights Anthropic credential refresh before native Messages API calls
- Hermes still retries once on a 401 after rebuilding the Anthropic client, as a fallback path
## OpenAI Codex path
Codex uses a separate Responses API path:
- `api_mode = codex_responses`
- dedicated credential resolution and auth store support
## Auxiliary model routing
Auxiliary tasks such as:
- vision
- web extraction summarization
- context compression summaries
- session search summarization
- skills hub operations
- MCP helper operations
- memory flushes
can use their own provider/model routing rather than the main conversational model.
When an auxiliary task is configured with provider `main`, Hermes resolves that through the same shared runtime path as normal chat. In practice that means:
- env-driven custom endpoints still work
- custom endpoints saved via `hermes model` / `config.yaml` also work
- auxiliary routing can tell the difference between a real saved custom endpoint and the OpenRouter fallback
## Fallback models
docs: fallback providers + /background command documentation * docs: comprehensive fallback providers documentation - New dedicated page: user-guide/features/fallback-providers.md covering both primary model fallback and auxiliary task fallback systems - Updated configuration.md with fallback_model config section - Updated environment-variables.md noting fallback is config-only - Fleshed out developer-guide/provider-runtime.md fallback section with internal architecture details (trigger points, activation flow, config flow) - Added cross-reference from provider-routing.md distinguishing OpenRouter sub-provider routing from Hermes-level model fallback - Added new page to sidebar under Integrations * docs: comprehensive /background command documentation - Added Background Sessions section to cli.md covering how it works (daemon threads, isolated sessions, config inheritance, Rich panel output, bell notification, concurrent tasks) - Added Background Sessions section to messaging/index.md covering messaging-specific behavior (async execution, result delivery back to same chat, fire-and-forget pattern) - Documented background_process_notifications config (all/result/error/off) in messaging docs and configuration.md - Added HERMES_BACKGROUND_NOTIFICATIONS env var to reference page - Fixed inconsistency in slash-commands.md: /background was listed as messaging-only but works in both CLI and messaging. Moved it to the 'both surfaces' note. - Expanded one-liner table descriptions with detail and cross-references
2026-03-15 06:24:28 -07:00
Hermes supports a configured fallback model/provider pair, allowing runtime failover when the primary model encounters errors.
### How it works internally
1. **Storage**: `AIAgent.__init__` stores the `fallback_model` dict and sets `_fallback_activated = False`.
2. **Trigger points**: `_try_activate_fallback()` is called from three places in the main retry loop in `run_agent.py`:
- After max retries on invalid API responses (None choices, missing content)
- On non-retryable client errors (HTTP 401, 403, 404)
- After max retries on transient errors (HTTP 429, 500, 502, 503)
3. **Activation flow** (`_try_activate_fallback`):
- Returns `False` immediately if already activated or not configured
- Calls `resolve_provider_client()` from `auxiliary_client.py` to build a new client with proper auth
- Determines `api_mode`: `codex_responses` for openai-codex, `anthropic_messages` for anthropic, `chat_completions` for everything else
- Swaps in-place: `self.model`, `self.provider`, `self.base_url`, `self.api_mode`, `self.client`, `self._client_kwargs`
- For anthropic fallback: builds a native Anthropic client instead of OpenAI-compatible
- Re-evaluates prompt caching (enabled for Claude models on OpenRouter)
- Sets `_fallback_activated = True` — prevents firing again
- Resets retry count to 0 and continues the loop
4. **Config flow**:
- CLI: `cli.py` reads `CLI_CONFIG["fallback_model"]` → passes to `AIAgent(fallback_model=...)`
- Gateway: `gateway/run.py._load_fallback_model()` reads `config.yaml` → passes to `AIAgent`
- Validation: both `provider` and `model` keys must be non-empty, or fallback is disabled
### What does NOT support fallback
- **Subagent delegation** (`tools/delegate_tool.py`): subagents inherit the parent's provider but not the fallback config
- **Auxiliary tasks**: use their own independent provider auto-detection chain (see Auxiliary model routing above)
docs: resync reference, user-guide, developer-guide, and messaging pages against code (#17738) Broad drift audit against origin/main (b52b63396). Reference pages (most user-visible drift): - slash-commands: add /busy, /curator, /footer, /indicator, /redraw, /steer that were missing; drop non-existent /terminal-setup; fix /q footnote (resolves to /queue, not /quit); extend CLI-only list with all 24 CLI-only commands in the registry - cli-commands: add dedicated sections for hermes curator / fallback / hooks (new subcommands not previously documented); remove stale hermes honcho standalone section (the plugin registers dynamically via hermes memory); list curator/fallback/hooks in top-level table; fix completion to include fish - toolsets-reference: document the real 52-toolset count; split browser vs browser-cdp; add discord / discord_admin / spotify / yuanbao; correct hermes-cli tool count from 36 to 38; fix misleading claim that hermes-homeassistant adds tools (it's identical to hermes-cli) - tools-reference: bump tool count 55 -> 68; add 7 Spotify, 5 Yuanbao, 2 Discord toolsets; move browser_cdp/browser_dialog to their own browser-cdp toolset section - environment-variables: add 40+ user-facing HERMES_* vars that were undocumented (--yolo, --accept-hooks, --ignore-*, inference model override, agent/stream/checkpoint timeouts, OAuth trace, per-platform batch tuning for Telegram/Discord/Matrix/Feishu/WeCom, cron knobs, gateway restart/connect timeouts); dedupe the Cron Scheduler section; replace stale QQ_SANDBOX with QQ_PORTAL_HOST User-guide (top level): - cli.md: compression preserves last 20 turns, not 4 (protect_last_n: 20) - configuration.md: display.platforms is the canonical per-platform override key; tool_progress_overrides is deprecated and auto-migrated - profiles.md: model.default is the config key, not model.model - sessions.md: CLI/TUI session IDs use 6-char hex, gateway uses 8 - checkpoints-and-rollback.md: destructive-command list now matches _DESTRUCTIVE_PATTERNS (adds rmdir, cp, install, dd) - docker.md: the container runs as non-root hermes (UID 10000) via gosu; fix install command (uv pip); add missing --insecure on the dashboard compose example (required for non-loopback bind) - security.md: systemctl danger pattern also matches 'restart' - index.md: built-in tool count 47 -> 68 - integrations/index.md: 6 STT providers, 8 memory providers - integrations/providers.md: drop fictional dashscope/qwen aliases Features: - overview.md: 9 image models (not 8), 9 TTS providers (not 5), 8 memory providers (Supermemory was missing) - tool-gateway.md: 9 image models - tools.md: extend common-toolsets list with search / messaging / spotify / discord / debugging / safe - fallback-providers.md: add 6 real providers from PROVIDER_REGISTRY (lmstudio, kimi-coding-cn, stepfun, alibaba-coding-plan, tencent-tokenhub, azure-foundry) - plugins.md: Available Hooks table now includes on_session_finalize, on_session_reset, subagent_stop - built-in-plugins.md: add the 7 bundled plugins the page didn't mention (spotify, google_meet, three image_gen providers, two dashboard examples) - web-dashboard.md: add --insecure and --tui flags - cron.md: hermes cron create takes positional schedule/prompt, not flags Messaging: - telegram.md: TELEGRAM_WEBHOOK_SECRET is now REQUIRED when TELEGRAM_WEBHOOK_URL is set (gateway refuses to start without it per GHSA-3vpc-7q5r-276h). Biggest user-visible drift in the batch. - discord.md: HERMES_DISCORD_TEXT_BATCH_SPLIT_DELAY_SECONDS default is 2.0, not 0.1 - dingtalk.md: document DINGTALK_REQUIRE_MENTION / FREE_RESPONSE_CHATS / MENTION_PATTERNS / HOME_CHANNEL / ALLOW_ALL_USERS that the adapter supports - bluebubbles.md: drop fictional BLUEBUBBLES_SEND_READ_RECEIPTS env var; the setting lives in platforms.bluebubbles.extra only - qqbot.md: drop dead QQ_SANDBOX; add real QQ_PORTAL_HOST and QQ_GROUP_ALLOWED_USERS - wecom-callback.md: replace 'hermes gateway start' (service-only) with 'hermes gateway' for first-time setup Developer-guide: - architecture.md: refresh tool/toolset counts (61/52), terminal backend count (7), line counts for run_agent.py (~13.7k), cli.py (~11.5k), main.py (~10.4k), setup.py (~3.5k), gateway/run.py (~12.2k), mcp_tool.py (~3.1k); add yuanbao adapter, bump platform adapter count 18 -> 20 - agent-loop.md: run_agent.py line count 10.7k -> 13.7k - tools-runtime.md: add vercel_sandbox backend - adding-tools.md: remove stale 'Discovery import added to model_tools.py' checklist item (registry auto-discovery) - adding-platform-adapters.md: mark send_typing / get_chat_info as concrete base methods; only connect/disconnect/send are abstract - acp-internals.md: ACP sessions now persist to SessionDB (~/.hermes/state.db); acp.run_agent call uses use_unstable_protocol=True - cron-internals.md: gateway runs scheduler in a dedicated background thread via _start_cron_ticker, not on a maintenance cycle; locking is cross-process via fcntl.flock (Unix) / msvcrt.locking (Windows) - gateway-internals.md: gateway/run.py ~12k lines - provider-runtime.md: cron DOES support fallback (run_job reads fallback_providers from config) - session-storage.md: SCHEMA_VERSION = 11 (not 9); add migrations 10 and 11 (trigram FTS, inline-mode FTS5 re-index); add api_call_count column to Sessions DDL; document messages_fts_trigram and state_meta in the architecture tree - context-compression-and-caching.md: remove the obsolete 'context pressure warnings' section (warnings were removed for causing models to give up early) - context-engine-plugin.md: compress() signature now includes focus_topic param - extending-the-cli.md: _build_tui_layout_children signature now includes model_picker_widget; add to default layout Also fixed three pre-existing broken links/anchors the build warned about (docker.md -> api-server.md, yuanbao.md -> cron-jobs.md and tips#background-tasks, nix-setup.md -> #container-aware-cli). Regenerated per-skill pages via website/scripts/generate-skill-docs.py so catalog tables and sidebar are consistent with current SKILL.md frontmatter. docusaurus build: clean, no broken links or anchors.
2026-04-29 20:55:59 -07:00
Cron jobs **do** support fallback: `run_job()` reads `fallback_providers` (or legacy `fallback_model`) from `config.yaml` and passes it to `AIAgent(fallback_model=...)`, matching the gateway's `_load_fallback_model()` pattern. See [Cron Internals](./cron-internals.md).
docs: fallback providers + /background command documentation * docs: comprehensive fallback providers documentation - New dedicated page: user-guide/features/fallback-providers.md covering both primary model fallback and auxiliary task fallback systems - Updated configuration.md with fallback_model config section - Updated environment-variables.md noting fallback is config-only - Fleshed out developer-guide/provider-runtime.md fallback section with internal architecture details (trigger points, activation flow, config flow) - Added cross-reference from provider-routing.md distinguishing OpenRouter sub-provider routing from Hermes-level model fallback - Added new page to sidebar under Integrations * docs: comprehensive /background command documentation - Added Background Sessions section to cli.md covering how it works (daemon threads, isolated sessions, config inheritance, Rich panel output, bell notification, concurrent tasks) - Added Background Sessions section to messaging/index.md covering messaging-specific behavior (async execution, result delivery back to same chat, fire-and-forget pattern) - Documented background_process_notifications config (all/result/error/off) in messaging docs and configuration.md - Added HERMES_BACKGROUND_NOTIFICATIONS env var to reference page - Fixed inconsistency in slash-commands.md: /background was listed as messaging-only but works in both CLI and messaging. Moved it to the 'both surfaces' note. - Expanded one-liner table descriptions with detail and cross-references
2026-03-15 06:24:28 -07:00
### Test coverage
See `tests/test_fallback_model.py` for comprehensive tests covering all supported providers, one-shot semantics, and edge cases.
## Related docs
- [Agent Loop Internals](./agent-loop.md)
- [ACP Internals](./acp-internals.md)
- [Context Compression & Prompt Caching](./context-compression-and-caching.md)