docs: add configuration guide for CLI providers and multi-bot Telegram

- Add PR #1633 (gemini-cli provider) to contributions table
- Add configuration guide section covering:
  - claude-cli, codex-cli, and gemini-cli providers with model_list examples
  - Multiple Telegram bots with bindings and per-agent config
  - Agent workspace and personality file notes

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

README.md

@@ -12,6 +12,131 @@ The main project is maintained at [sipeed/picoclaw](https://github.com/sipeed/pi
 | [#1479](https://github.com/sipeed/picoclaw/pull/1479) | fix(claude_cli): surface stdout in error when CLI exits non-zero | Open |
 | [#1480](https://github.com/sipeed/picoclaw/pull/1480) | docs: document claude-cli and codex-cli providers in README | Open |
 | [#1625](https://github.com/sipeed/picoclaw/pull/1625) | feat(channels): support multiple named Telegram bots | Open |
+| [#1633](https://github.com/sipeed/picoclaw/pull/1633) | feat(providers): add gemini-cli provider | Open |
+
+---
+
+## Configuration Guide
+
+Features in this fork that may not yet be merged upstream.
+
+### CLI-based LLM Providers
+
+PicoClaw supports three CLI-based providers that invoke local AI CLI tools as subprocesses.
+All three read the prompt from stdin and return the response on stdout.
+
+Add entries to `model_list` in your config:
+
+```json
+"model_list": [
+    {
+        "model_name": "claude-cli",
+        "model": "claude-cli/claude-code",
+        "request_timeout": 1200
+    },
+    {
+        "model_name": "codex-cli",
+        "model": "codex-cli/codex-cli",
+        "request_timeout": 1200
+    },
+    {
+        "model_name": "gemini-cli",
+        "model": "gemini-cli/gemini-2.5-pro",
+        "request_timeout": 1200
+    }
+]
+```
+
+The model ID after the `/` is passed as `--model` to the CLI. Sentinel values (`claude-code`, `codex-cli`, `gemini-cli`) skip the `--model` flag and let the CLI use its own default model.
+
+| Provider | Protocol prefix | Sentinel | CLI invoked |
+|----------|----------------|----------|-------------|
+| Claude Code | `claude-cli/` | `claude-code` | `claude -p --output-format json --dangerously-skip-permissions --no-chrome` |
+| OpenAI Codex | `codex-cli/` | `codex-cli` | `codex exec --json --dangerously-bypass-approvals-and-sandbox` |
+| Gemini CLI | `gemini-cli/` | `gemini-cli` | `gemini --yolo --output-format json --prompt ""` |
+
+**Prerequisites:** Each CLI must be installed and authenticated with `claude`, `codex`, or `gemini` available in PATH.
+
+---
+
+### Multiple Telegram Bots
+
+Run multiple Telegram bots from a single picoclaw instance, each connected to a separate AI agent. Each bot entry in `telegram_bots` creates a channel named `telegram-<id>`. Use `bindings` to route each channel to its agent.
+
+#### Config
+
+```json
+"channels": {
+    "telegram_bots": [
+        {
+            "id": "amber",
+            "enabled": true,
+            "token": "AMBER_BOT_TOKEN",
+            "allow_from": ["YOUR_TELEGRAM_USER_ID"],
+            "typing": { "enabled": true },
+            "placeholder": { "enabled": true, "text": "Thinking... 💭" }
+        },
+        {
+            "id": "karen",
+            "enabled": true,
+            "token": "KAREN_BOT_TOKEN",
+            "allow_from": ["YOUR_TELEGRAM_USER_ID"],
+            "typing": { "enabled": true },
+            "placeholder": { "enabled": true, "text": "Thinking... 💭" }
+        }
+    ]
+},
+"bindings": [
+    {
+        "agent_id": "amber",
+        "match": { "channel": "telegram-amber" }
+    },
+    {
+        "agent_id": "karen",
+        "match": { "channel": "telegram-karen" }
+    }
+]
+```
+
+#### Agents
+
+Define each agent in `agents.list` with its own workspace, model, and personality files:
+
+```json
+"agents": {
+    "list": [
+        {
+            "id": "amber",
+            "name": "Amber",
+            "default": true,
+            "workspace": "~/.picoclaw/agents/amber",
+            "model": {
+                "primary": "claude-cli",
+                "fallbacks": ["gemini-cli"]
+            },
+            "subagents": {
+                "allow_agents": ["karen"]
+            }
+        },
+        {
+            "id": "karen",
+            "name": "Karen",
+            "default": false,
+            "workspace": "~/.picoclaw/agents/karen",
+            "model": {
+                "primary": "claude-cli",
+                "fallbacks": ["gemini-cli"]
+            }
+        }
+    ]
+}
+```
+
+Each agent's workspace can contain `IDENTITY.md` and `AGENTS.md` files to define personality and behaviour. Picoclaw creates the workspace directories automatically on first run.
+
+**Note:** The legacy single-bot `channels.telegram` config is still supported and is automatically normalized to a `telegram-default` channel for backward compatibility.
+
+---
 
 ## Legal