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hermes-agent/plugins/observability/langfuse
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alt-glitch e1067dbbe5 tests: pin ink engine in _make_tui_argv npm-bootstrap tests (post-merge semantic fix) 
Main's rewritten test_tui_npm_install.py tests call _make_tui_argv expecting
the Ink/npm flow unconditionally; with the dual-engine dispatch merged in,
_resolve_tui_engine() auto-selects opentui whenever ui-opentui/dist is built
in the repo, routing the call away from the path under test (first subprocess
became 'node --version' instead of 'npm run build'). Pin the engine to ink
via an autouse fixture, mirroring the existing pinning precedent in
test_tui_resume_flow.py.
2026-06-12 10:32:40 +05:30
..
__init__.py tests: pin ink engine in _make_tui_argv npm-bootstrap tests (post-merge semantic fix) 2026-06-12 10:32:40 +05:30
plugin.yaml Add Hermes desktop app (#20059) 2026-05-31 17:46:56 -05:00
README.md Add Hermes desktop app (#20059) 2026-05-31 17:46:56 -05:00

README.md

Langfuse Observability Plugin

This plugin ships bundled with Hermes but is opt-in — it only loads when you explicitly enable it.

Enable

Pick one:

# Interactive: walks you through credentials + SDK install + enable
hermes tools  # → Langfuse Observability

# Manual
pip install langfuse
hermes plugins enable observability/langfuse

Required credentials

Set these in ~/.hermes/.env (or via hermes tools):

HERMES_LANGFUSE_PUBLIC_KEY=pk-lf-...
HERMES_LANGFUSE_SECRET_KEY=sk-lf-...
HERMES_LANGFUSE_BASE_URL=https://cloud.langfuse.com   # or your self-hosted URL

Without the SDK or credentials the hooks no-op silently — the plugin fails open.

Verify

hermes plugins list                 # observability/langfuse should show "enabled"
hermes chat -q "hello"              # then check Langfuse for a "Hermes turn" trace

Optional tuning

HERMES_LANGFUSE_ENV=production       # environment tag
HERMES_LANGFUSE_RELEASE=v1.0.0       # release tag
HERMES_LANGFUSE_SAMPLE_RATE=0.5      # sample 50% of traces
HERMES_LANGFUSE_MAX_CHARS=12000      # max chars per field (default: 12000)
HERMES_LANGFUSE_DEBUG=true           # verbose plugin logging

Disable

hermes plugins disable observability/langfuse