feat(skills): add inference.sh skill (terminal-based, no custom tools) (#1686)

Add inference.sh as a built-in skill that uses the terminal tool to
run infsh CLI commands. No custom tools or tool registration — the
skill teaches the agent how to use the infsh binary via terminal.

Covers 150+ AI apps: image gen (FLUX, Reve, Seedream), video (Veo,
Wan, Seedance), LLMs, search (Tavily, Exa), 3D, avatars, and more.

Includes reference docs for authentication, app discovery, running
apps, and CLI command reference.

Based on PR #1021 by @okaris, reworked as a skill-only integration.

Co-authored-by: okaris <okaris@users.noreply.github.com>

skills/inference-sh/cli/SKILL.md

@@ -0,0 +1,155 @@
+---
+name: inference-sh-cli
+description: "Run 150+ AI apps via inference.sh CLI (infsh) — image generation, video creation, LLMs, search, 3D, social automation. Uses the terminal tool. Triggers: inference.sh, infsh, ai apps, flux, veo, image generation, video generation, seedream, seedance, tavily"
+version: 1.0.0
+author: okaris
+license: MIT
+metadata:
+  hermes:
+    tags: [AI, image-generation, video, LLM, search, inference, FLUX, Veo, Claude]
+    related_skills: []
+---
+
+# inference.sh CLI
+
+Run 150+ AI apps in the cloud with a simple CLI. No GPU required.
+
+All commands use the **terminal tool** to run `infsh` commands.
+
+## When to Use
+
+- User asks to generate images (FLUX, Reve, Seedream, Grok, Gemini image)
+- User asks to generate video (Veo, Wan, Seedance, OmniHuman)
+- User asks about inference.sh or infsh
+- User wants to run AI apps without managing individual provider APIs
+- User asks for AI-powered search (Tavily, Exa)
+- User needs avatar/lipsync generation
+
+## Prerequisites
+
+The `infsh` CLI must be installed and authenticated. Check with:
+
+```bash
+infsh me
+```
+
+If not installed:
+
+```bash
+curl -fsSL https://cli.inference.sh | sh
+infsh login
+```
+
+See `references/authentication.md` for full setup details.
+
+## Workflow
+
+### 1. Always Search First
+
+Never guess app names — always search to find the correct app ID:
+
+```bash
+infsh app list --search flux
+infsh app list --search video
+infsh app list --search image
+```
+
+### 2. Run an App
+
+Use the exact app ID from the search results. Always use `--json` for machine-readable output:
+
+```bash
+infsh app run <app-id> --input '{"prompt": "your prompt here"}' --json
+```
+
+### 3. Parse the Output
+
+The JSON output contains URLs to generated media. Present these to the user with `MEDIA:<url>` for inline display.
+
+## Common Commands
+
+### Image Generation
+
+```bash
+# Search for image apps
+infsh app list --search image
+
+# FLUX Dev with LoRA
+infsh app run falai/flux-dev-lora --input '{"prompt": "sunset over mountains", "num_images": 1}' --json
+
+# Gemini image generation
+infsh app run google/gemini-2-5-flash-image --input '{"prompt": "futuristic city", "num_images": 1}' --json
+
+# Seedream (ByteDance)
+infsh app run bytedance/seedream-5-lite --input '{"prompt": "nature scene"}' --json
+
+# Grok Imagine (xAI)
+infsh app run xai/grok-imagine-image --input '{"prompt": "abstract art"}' --json
+```
+
+### Video Generation
+
+```bash
+# Search for video apps
+infsh app list --search video
+
+# Veo 3.1 (Google)
+infsh app run google/veo-3-1-fast --input '{"prompt": "drone shot of coastline"}' --json
+
+# Seedance (ByteDance)
+infsh app run bytedance/seedance-1-5-pro --input '{"prompt": "dancing figure", "resolution": "1080p"}' --json
+
+# Wan 2.5
+infsh app run falai/wan-2-5 --input '{"prompt": "person walking through city"}' --json
+```
+
+### Local File Uploads
+
+The CLI automatically uploads local files when you provide a path:
+
+```bash
+# Upscale a local image
+infsh app run falai/topaz-image-upscaler --input '{"image": "/path/to/photo.jpg", "upscale_factor": 2}' --json
+
+# Image-to-video from local file
+infsh app run falai/wan-2-5-i2v --input '{"image": "/path/to/image.png", "prompt": "make it move"}' --json
+
+# Avatar with audio
+infsh app run bytedance/omnihuman-1-5 --input '{"audio": "/path/to/audio.mp3", "image": "/path/to/face.jpg"}' --json
+```
+
+### Search & Research
+
+```bash
+infsh app list --search search
+infsh app run tavily/tavily-search --input '{"query": "latest AI news"}' --json
+infsh app run exa/exa-search --input '{"query": "machine learning papers"}' --json
+```
+
+### Other Categories
+
+```bash
+# 3D generation
+infsh app list --search 3d
+
+# Audio / TTS
+infsh app list --search tts
+
+# Twitter/X automation
+infsh app list --search twitter
+```
+
+## Pitfalls
+
+1. **Never guess app IDs** — always run `infsh app list --search <term>` first. App IDs change and new apps are added frequently.
+2. **Always use `--json`** — raw output is hard to parse. The `--json` flag gives structured output with URLs.
+3. **Check authentication** — if commands fail with auth errors, run `infsh login` or verify `INFSH_API_KEY` is set.
+4. **Long-running apps** — video generation can take 30-120 seconds. The terminal tool timeout should be sufficient, but warn the user it may take a moment.
+5. **Input format** — the `--input` flag takes a JSON string. Make sure to properly escape quotes.
+
+## Reference Docs
+
+- `references/authentication.md` — Setup, login, API keys
+- `references/app-discovery.md` — Searching and browsing the app catalog
+- `references/running-apps.md` — Running apps, input formats, output handling
+- `references/cli-reference.md` — Complete CLI command reference