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pos ai gemini: --session gives ask/chat persistent memory (~/.local/share/linux_post_install/ai/<name>.json, capped 40 turns), new 'sessions' subcommand to list/clear; --system injects a Gemini systemInstruction on every turn without storing it in the session file. Telegram listener keeps one session per chat (telegram-<chat_id>), clears on 'ai /reset', passes a Telegram-voice system prompt (emojis welcome), and strips markdown from replies before sendMessage since messages are sent as plain text. Docs: howto/ai.md flags/sessions/bridge behavior.
106 lines
3.8 KiB
Markdown
106 lines
3.8 KiB
Markdown
# How-To: `pos ai`
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Chat with Google Gemini — from the terminal and through the Telegram bot.
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Tools: `gemini` (`ask`, `chat`, `models`).
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| Tool | What it does |
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|------|--------------|
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| `pos ai gemini ask "<prompt>"` | One-shot answer to stdout (scriptable) |
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| `pos ai gemini ask --session <name> "…"` | Same, but remembers prior turns |
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| `pos ai gemini chat` | Interactive multi-turn conversation |
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| `pos ai gemini models` | List available model ids |
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| `pos ai gemini sessions` | List/clear persistent sessions (`reset <name>`) |
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Shared flags: `--model <id>` overrides the model; `--system "<text>"` adds a
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system instruction to every turn (kept out of the session file).
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---
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## First run — get a key, configure, chat
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1. Get a free API key from https://aistudio.google.com/apikey (requires a Google
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account).
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2. Configure it (masked input):
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```bash
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pos config ai # enter AI_GEMINI_API_KEY
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```
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3. Test:
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```bash
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pos ai gemini ask "Explain DNS in one line"
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pos ai gemini models # verify the default model id is live
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pos ai gemini chat # multi-turn conversation
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```
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`ai.env` lives at `~/.config/linux_post_install/ai.env` (chmod 600); `pos config ai`
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is the only place the key is written. The key is never printed by `pos`.
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## From the Telegram bot
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Once `pos ai gemini ask` works, any non-command message starting with `ai ` is
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answered by the model — no bot map entry needed:
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```
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you: ai what is Nvidia
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bot: NVIDIA is a company best known for GPUs...
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```
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The bridge lives in the Telegram listener's `handle_message` (it calls
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`pos ai gemini ask`); only the owner chat is served, so your key stays private.
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Set a different model per message:
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```
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you: ai --model gemini-2.5-flash explain a Raft consensus log
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```
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### Telegram memory & formatting
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Each chat has its own persistent session (`telegram-<chat id>`), so the model
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remembers the conversation; `ai /reset` clears it. The listener passes a system
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prompt telling the model it is answering in a Telegram chat — so it uses emojis
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and stays lively — and strips markdown (`**x**`, backticks, `#`, links…) from
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the reply before sending it, since messages go out as plain text.
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## Recipes
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- **Answer from a file:** `pos ai gemini ask "$(cat notes.txt)"`
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- **Pipe into it:** `echo "fix this: $(cat error.log)" | pos ai gemini ask`
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- **Answer in a cron job:** `pos ai gemini ask "summarize today's git log" > /tmp/ai_digest.txt`
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- **Change the default model:**
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```bash
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pos config ai # set AI_GEMINI_MODEL, or:
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AI_GEMINI_MODEL=gemini-2.5-flash pos ai gemini ask "hi"
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```
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## How it works
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- `ask` POSTs `contents:[{role:user, parts:[{text:"…"}]}]` to
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`https://generativelanguage.googleapis.com/v1beta/models/<model>:generateContent`
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with the key in the `x-goog-api-key` header, and prints
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`.candidates[0].content.parts[].text` — nothing else.
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- `chat` keeps the whole conversation in memory as a growing `contents[]` array,
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so later turns have earlier context. `/reset` drops it.
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- On a non-2xx response the API's `error.message` is shown and the exit code is
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non-zero — so scripts can rely on `ask` failing loudly.
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## Troubleshooting
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- `ask` errors "No Gemini API key — run 'pos config ai'" → the key isn't set
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(or `ai.env` isn't readable). Run `pos config ai`.
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- `API error 400` → the model id is wrong or the prompt is too long for the
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model's context window; check `pos ai gemini models`.
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- `API error 429` → rate limit (free tier); wait and retry, or use a different
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model.
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- Nothing in Telegram for `ai …` → the listener daemon must be running
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(`pos communication telegram listener --status`); the bot token and owner
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chat id must match `pos config telegram`.
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---
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## Related
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- Reference: [DOC/POS.md → ai](../POS.md#ai)
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- Telegram bridge context: [communication.md](communication.md)
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