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Hermes provider fails: stdin vs -z PROMPT + --source argument doesn't exist in top level + missing binary="ollama" method of running #656
Description
Summary
hermes: error: argument -z expected one argument right after the flag for the prompt, but the prompt was sent viastdininstead of as-z` value. which causes a failure to launch.- default
--source hackagentis injected where the tested binary does not accept--sourceat the top level, its an option for thehermes chatwhich is used to add a tag to the messages for tracking, but we do not use thechatargument for our purpose. So it exits with an errorhermes: 'hackagent' is not a hermes command - No
binary="ollama"mode available, unlikeclaude.py:188/codex.py:260(ollama launch claude|codex),hermes.pyonly shells nativehermes, so local ollama models are unsupported to run in similar fashion to codex and claude code.
Tested Binary Version: v0.21.5
Combined fix: pass prompt as -z value (not stdin), only emit --source when explicitly configured, and add is_ollama branch mirroring Claude/Codex.
Expected Fix
# hackagent/router/providers/hermes.py:347
- self.source = config.get("source", "hackagent")
# hackagent/router/providers/hermes.py:184
- argv.extend(["--source", self.source])
# hackagent/router/providers/hermes.py:165 _build_argv -> add is_ollama parity with claude/codex
+ is_ollama = self.binary == "ollama"
+ if is_ollama:
+ # mirrors claude.py:188 / codex.py:260
+ argv = ["ollama", "launch", "hermes", "--model", self.model, "--yes", "--"]
+ # then fall through to -z handling below; prompt inserted as -z value
+ argv.extend(["-z"])
+ else:
+ argv = [self.binary, "-z"]
if self.model and not is_ollama:
argv.extend(["-m", self.model])
# ... provider / ignore_user_config / safe_mode / source / extra_args as before
# hackagent/router/providers/hermes.py:188 _run -> insert prompt as -z value, not stdin
- proc = subprocess.run(argv, input=prompt_text, capture_output=True, text=True, timeout=self.timeout, cwd=self.cwd)
+ base_argv = self._build_argv() # [hermes, -z, <prompt>, -m model, ...] or [ollama, launch, hermes, ... --, -z, <prompt>, ...]
+ idx = base_argv.index("-z")
+ argv = base_argv[:idx+1] + [prompt_text] + base_argv[idx+1:]
+ # For ollama path the -m is already encoded as --model before --, do not duplicate
+ proc = subprocess.run(argv, capture_output=True, text=True, timeout=self.timeout, cwd=self.cwd)
Activity
[-]Hermes provider fails: `stdin` vs `-z PROMPT` + `--source` argument doesn't exist in hermes + missing `binary="ollama"` method of running[/-][+]Hermes provider fails: `stdin` vs `-z PROMPT` + `--source` argument doesn't exist in top level + missing `binary="ollama"` method of running[/+]franconicola commentedon Oct 19, 2026
Still present on
main(v0.15.0). The provider moved tohackagent/models/completions/in the restructure. #658 fixes this against the oldhackagent/router/providers/layout, so that fix needs porting to the new location.