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machines.coaxmetal: switch hermes to claude-opus-5-5 on the claude subscription
author
lassulus
date
(Oct 9, 2026, 8:03 PM CEST)
commit
7831898a
7831898adb26f389fe5812c5425fe9ff37347682
parent
31da076a
31da076a14f622ea3c4b7d4b362bc993b40d364e
+31
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machines/coaxmetal/hermes.nix
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machines/coaxmetal/hermes.nix
···
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];
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settings.model = {
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# The cluster serves Qwen3.6-27B-FP8 (also aliased as "default" in
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# /v1/models — both resolve to the same weights); pin the explicit id so
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# logs and 400s name the actual model. Verified against the live endpoint
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# that it emits native tool_calls, which Hermes Agent requires.
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default = "Qwen3.6-27B-FP8";
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# hermes's built-in "nous" provider is OAuth-only and hardcodes the dead
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# host inference.nousresearch.com (NXDOMAIN) — true on both 0.17.0 and
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# main, so we drive the cluster's OpenAI-compatible endpoint instead.
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# Claude Opus 5.5 on lass's Claude subscription: the anthropic provider
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# takes the `claude setup-token` OAuth token (sk-ant-oat…) from
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# ANTHROPIC_TOKEN (hermes-anthropic generator below) and sends it as a
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# Bearer token. Anthropic bills third-party apps on subscription tokens
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# as extra usage; hermes renames some tools on the OAuth wire to avoid
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# that classification (agent/anthropic_adapter.py), which goes against
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# Anthropic's usage policies and risks the account. Chosen knowingly.
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#
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# It MUST be a *named* custom provider ("custom:<name>" + a
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# custom_providers entry), not bare "custom". Bare custom resolves its
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# credential from a host-gated candidate list
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# (hermes_cli/runtime_provider.py:1244) that only forwards
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# OPENAI_API_KEY when base_url's host is openai.com — a deliberate
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# anti-credential-leak measure (upstream #28660 / GHSA-76xc-57q6-vm5m).
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# For any other host it silently substitutes the literal placeholder
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# "no-key-required" and the endpoint 401s. A named entry instead reads
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# the key from its declared key_env (runtime_provider.py:692), which is
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# not host-gated. Named entries also ignore config.yaml's model.api_key,
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# so a stray `hermes model` run can no longer shadow this with a stale
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# key (that is exactly how the Nous→cluster switch broke).
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provider = "custom:llama";
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base_url = "https://inference.p0.contact/v1";
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# The custom provider can't auto-detect limits, so unset it leaves
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# context uncompressed and defaults max_tokens to 65536 — once history
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# outgrows the window, input + max_tokens exceeds it and the endpoint
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# 400s ("check the model name and other parameters"). vLLM reports
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# max_model_len 262144 for this model: pin that as the window so hermes
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# compresses in time, and keep a sane output cap (covers thinking +
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# reply) so input + max_tokens always stays under it.
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context_length = 262144;
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max_tokens = 16384;
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# Context (1M) and output (128k) limits come from hermes's own model
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# tables, so nothing is pinned here.
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provider = "anthropic";
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default = "claude-opus-5-5";
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};
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# The endpoint hermes actually authenticates against. key_env names the
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# env var carrying the token; it comes from the hermes-env generator below
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# via environmentFiles, so the secret never enters the nix store.
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# api_mode is pinned because auto-detection only runs as a fallback.
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# The shared llama cluster stays configured as a named provider, so
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# `/model Qwen3.6-27B-FP8 --provider custom:llama` switches back. Its key
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# comes from hermes-env (key_env), never the nix store. It MUST be a
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# *named* custom provider ("custom:<name>" + this entry), not bare
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# "custom": bare custom resolves its credential from a host-gated list
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# (hermes_cli/runtime_provider.py:1244) that only forwards OPENAI_API_KEY
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# to openai.com and otherwise sends "no-key-required" (upstream #28660 /
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# GHSA-76xc-57q6-vm5m). api_mode is pinned because auto-detection only
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# runs as a fallback.
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settings.custom_providers = [
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{
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name = "llama";
···
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share = true;
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};
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# Claude subscription OAuth token for the anthropic provider: run
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# `claude setup-token` (long-lived, sk-ant-oat…) and paste it at the
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# prompt. persist=true so it is asked once.
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clan.core.vars.generators.hermes-anthropic.prompts.oauth-token = {
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description = "Claude subscription OAuth token from `claude setup-token` (sk-ant-oat…)";
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type = "hidden";
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persist = true;
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};
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# Assemble the .env Hermes reads (mirrors the opencrow-env pattern).
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clan.core.vars.generators.hermes-env = {
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dependencies = [
···
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"hermes-llama"
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"hermes-api"
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"radicale-hermes"
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"hermes-anthropic"
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];
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files."hermes.env" = { };
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runtimeInputs = [ pkgs.coreutils ];
···
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LLAMA_API_TOKEN=$(cat "$in"/hermes-llama/llama-api-token)
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API_SERVER_KEY=$(cat "$in"/hermes-api/api_key)
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CALDAV_PASSWORD=$(cat "$in"/radicale-hermes/password)
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ANTHROPIC_TOKEN=$(cat "$in"/hermes-anthropic/oauth-token)
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EOF
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'';
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};