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a562420383
Problem: Ctrl+C in Hermes TUI shows 'copied' but clipboard often empty.
Root causes:
- Native Linux tools (xclip, wl-copy) require DISPLAY/WAYLAND_DISPLAY; in
headless Docker/SSH they fail or hang.
- OSC 52 fallback requires terminal emulator support; when absent, sequence
is dropped silently.
- Dashboard OSC 52 → Clipboard API path fails due to missing user gesture;
errors were silently caught.
- User feedback 'copied selection' was shown unconditionally, regardless of
success.
Solution implemented:
- Short-circuit Linux native clipboard probing when no display server is
present (no DISPLAY and no WAYLAND_DISPLAY). Avoids futile attempts and
timeouts.
- Add HERMES_TUI_DEBUG_CLIPBOARD env var (1/true). When set, TUI logs to
stderr which clipboard path is used, probe results on Linux, and whether
OSC 52 was emitted. Greatly improves diagnosability.
- Improve dashboard clipboard error handling: replace empty catch blocks
with console.warn messages for OSC 52 decode/Write failures and direct
copy/paste errors. Makes browser permission/user-gesture failures visible
in DevTools.
- Add comprehensive clipboard troubleshooting documentation to README and
AGENTS, covering OSC 52 verification, tmux config, Docker/headless
constraints, env vars, dashboard caveats, and fallback strategies.
Technical details:
- in ui-tui/packages/hermes-ink/src/ink/termio/osc.ts:
- Early return on Linux if both DISPLAY and WAYLAND_DISPLAY unset.
- Refactor probe sequence to async with 500ms timeout,
caching result; subsequent copies use cached tool immediately.
- Emit debug logs when HERMES_TUI_DEBUG_CLIPBOARD=1.
- in ink.tsx: log when OSC 52 not emitted (native
or tmux path in use) in debug mode.
- : OSC 52 handler and Ctrl+Shift+C handler now
log warnings to console on Clipboard API rejection with error message.
- Documentation: new 'Clipboard Troubleshooting' section in README; new
'Clipboard environment variables and pitfalls' subsection in AGENTS.md
(Known Pitfalls).
Tests: full ui-tui test suite (292 tests) passes; clipboard and OSC tests
unaffected. No breaking changes.
Files changed:
- ui-tui/packages/hermes-ink/src/ink/termio/osc.ts
- ui-tui/packages/hermes-ink/src/ink/ink.tsx
- web/src/pages/ChatPage.tsx
- README.md
- AGENTS.md
- CHANGELOG.md (new)
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| .. | ||
| public | ||
| src | ||
| eslint.config.js | ||
| index.html | ||
| package-lock.json | ||
| package.json | ||
| README.md | ||
| tsconfig.app.json | ||
| tsconfig.json | ||
| tsconfig.node.json | ||
| vite.config.ts | ||
Hermes Agent — Web UI
Browser-based dashboard for managing Hermes Agent configuration, API keys, and monitoring active sessions.
Stack
- Vite + React 19 + TypeScript
- Tailwind CSS v4 with custom dark theme
- shadcn/ui-style components (hand-rolled, no CLI dependency)
Development
# Start the backend API server
cd ../
python -m hermes_cli.main web --no-open
# In another terminal, start the Vite dev server (with HMR + API proxy)
cd web/
npm run dev
The Vite dev server proxies /api requests to http://127.0.0.1:9119 (the FastAPI backend).
Build
npm run build
This outputs to ../hermes_cli/web_dist/, which the FastAPI server serves as a static SPA. The built assets are included in the Python package via pyproject.toml package-data.
Structure
src/
├── components/ui/ # Reusable UI primitives (Card, Badge, Button, Input, etc.)
├── lib/
│ ├── api.ts # API client — typed fetch wrappers for all backend endpoints
│ └── utils.ts # cn() helper for Tailwind class merging
├── pages/
│ ├── StatusPage # Agent status, active/recent sessions
│ ├── ConfigPage # Dynamic config editor (reads schema from backend)
│ └── EnvPage # API key management with save/clear
├── App.tsx # Main layout and navigation
├── main.tsx # React entry point
└── index.css # Tailwind imports and theme variables