Add github copilot as LLM provider.

.env.example

@@ -4,7 +4,7 @@ DATABASE_POOL_SIZE=10
 
 # LLM Provider
 # LLM_BACKEND=nearai           # default
-# Possible values: nearai, ollama, openai_compatible, openai, anthropic, tinfoil
+# Possible values: nearai, ollama, openai_compatible, openai, anthropic, github_copilot, tinfoil
 # LLM_REQUEST_TIMEOUT_SECS=120  # Increase for local LLMs (Ollama, vLLM, LM Studio)
 
 # === Anthropic Direct ===
@@ -19,6 +19,17 @@ DATABASE_POOL_SIZE=10
 # === OpenAI Direct ===
 # OPENAI_API_KEY=sk-...
 
+# === GitHub Copilot ===
+# Uses the OAuth token from your Copilot IDE sign-in (for example
+# ~/.config/github-copilot/apps.json on Linux/macOS), or run `ironclaw onboard`
+# and choose the GitHub device login flow.
+# LLM_BACKEND=github_copilot
+# GITHUB_COPILOT_TOKEN=gho_...
+# GITHUB_COPILOT_MODEL=gpt-4o
+# IronClaw injects standard VS Code Copilot headers automatically.
+# Optional advanced headers for custom overrides:
+# GITHUB_COPILOT_EXTRA_HEADERS=Copilot-Integration-Id:vscode-chat
+
 # === NEAR AI (Chat Completions API) ===
 # Two auth modes:
 #   1. Session token (default): Uses browser OAuth (GitHub/Google) on first run.

FEATURE_PARITY.md

@@ -242,6 +242,7 @@ This document tracks feature parity between IronClaw (Rust implementation) and O
 | OpenRouter | ✅ | ✅ | - | Via OpenAI-compatible provider (RigAdapter) |
 | Tinfoil | ❌ | ✅ | - | Private inference provider (IronClaw-only) |
 | OpenAI-compatible | ❌ | ✅ | - | Generic OpenAI-compatible endpoint (RigAdapter) |
+| GitHub Copilot | ✅ | ✅ | - | Dedicated provider with OAuth token exchange (`GithubCopilotProvider`) |
 | Ollama (local) | ✅ | ✅ | - | via `rig::providers::ollama` (full support) |
 | Perplexity | ✅ | ❌ | P3 | Freshness parameter for web_search |
 | MiniMax | ✅ | ❌ | P3 | Regional endpoint selection |

README.md

@@ -167,7 +167,7 @@ written to `~/.ironclaw/.env` so they are available before the database connects
 ### Alternative LLM Providers
 
 IronClaw defaults to NEAR AI but works with any OpenAI-compatible endpoint.
-Popular options include **OpenRouter** (300+ models), **Together AI**, **Fireworks AI**,
+Popular options include **OpenRouter** (300+ models), **Together AI**, **Fireworks AI**, **Github Copilot**
 **Ollama** (local), and self-hosted servers like **vLLM** or **LiteLLM**.
 
 Select *"OpenAI-compatible"* in the wizard, or set environment variables directly:

README.zh-CN.md

@@ -164,7 +164,9 @@ ironclaw onboard
 ### 替代 LLM 提供商
 
 IronClaw 默认使用 NEAR AI，但兼容任何 OpenAI 兼容的端点。
-常用选项包括 **OpenRouter**（300+ 模型）、**Together AI**、**Fireworks AI**、**Ollama**（本地部署）以及自托管服务器如 **vLLM** 或 **LiteLLM**。
+常用选项包括 **OpenRouter**（300+ 模型）、**Together AI**、**Fireworks AI**、**Github Copilot**、**Ollama**（本地部署）以及自托管服务器如 **vLLM** 或 **LiteLLM**。
+
+对于 GitHub Copilot，`ironclaw onboard` 现在可以通过 GitHub 设备登录流程获取并保存令牌。
 
 在向导中选择 *"OpenAI-compatible"*，或直接设置环境变量：
 

docs/LLM_PROVIDERS.md

@@ -17,6 +17,7 @@ configurations.
 | Yandex AI Studio | `yandex` | `YANDEX_API_KEY` | YandexGPT models |
 | MiniMax | `minimax` | `MINIMAX_API_KEY` | MiniMax-M2.5 models |
 | Cloudflare Workers AI | `cloudflare` | `CLOUDFLARE_API_KEY` | Access to Workers AI |
+| GitHub Copilot | `github_copilot` | `GITHUB_COPILOT_TOKEN` | Multi-models |
 | Ollama | `ollama` | No | Local inference |
 | AWS Bedrock | `bedrock` | AWS credentials | Native Converse API |
 | OpenRouter | `openai_compatible` | `LLM_API_KEY` | 300+ models |
@@ -61,6 +62,34 @@ Popular models: `gpt-4o`, `gpt-4o-mini`, `o3-mini`
 
 ---
 
+## GitHub Copilot
+
+GitHub Copilot exposes chat endpoint at
+`https://api.githubcopilot.com`. IronClaw uses that endpoint directly through the
+built-in `github_copilot` provider.
+
+```env
+LLM_BACKEND=github_copilot
+GITHUB_COPILOT_TOKEN=gho_...
+GITHUB_COPILOT_MODEL=gpt-4o
+# Optional advanced headers if your setup needs them:
+# GITHUB_COPILOT_EXTRA_HEADERS=Copilot-Integration-Id:vscode-chat
+```
+
+`ironclaw onboard` can acquire this token for you using GitHub device login. If you
+already signed into Copilot through VS Code or a JetBrains IDE, you can also reuse
+the `oauth_token` stored in `~/.config/github-copilot/apps.json`. If you prefer,
+`LLM_BACKEND=github-copilot` also works as an alias.
+
+Popular models vary by subscription, but `gpt-4o` is a safe default. IronClaw keeps
+model entry manual for this provider because GitHub Copilot model listing may require
+extra integration headers on some clients. IronClaw automatically injects the standard
+VS Code identity headers (`User-Agent`, `Editor-Version`, `Editor-Plugin-Version`,
+`Copilot-Integration-Id`) and lets you override them with
+`GITHUB_COPILOT_EXTRA_HEADERS`.
+
+---
+
 ## Ollama (local)
 
 Install Ollama from [ollama.com](https://ollama.com), pull a model, then:

providers.json

@@ -77,6 +77,29 @@
       "can_list_models": false
     }
   },
+  {
+    "id": "github_copilot",
+    "aliases": [
+      "github-copilot",
+      "githubcopilot",
+      "copilot"
+    ],
+    "protocol": "github_copilot",
+    "default_base_url": "https://api.githubcopilot.com",
+    "api_key_env": "GITHUB_COPILOT_TOKEN",
+    "api_key_required": true,
+    "model_env": "GITHUB_COPILOT_MODEL",
+    "default_model": "gpt-4o",
+    "extra_headers_env": "GITHUB_COPILOT_EXTRA_HEADERS",
+    "description": "GitHub Copilot Chat API (OAuth token from IDE sign-in)",
+    "setup": {
+      "kind": "api_key",
+      "secret_name": "llm_github_copilot_token",
+      "key_url": "https://docs.github.com/en/copilot",
+      "display_name": "GitHub Copilot",
+      "can_list_models": false
+    }
+  },
   {
     "id": "tinfoil",
     "aliases": [],

src/config/llm.rs

@@ -298,6 +298,14 @@ impl LlmConfig {
         } else {
             Vec::new()
         };
+        let extra_headers = if canonical_id == "github_copilot" {
+            merge_extra_headers(
+                crate::llm::github_copilot_auth::default_headers(),
+                extra_headers,
+            )
+        } else {
+            extra_headers
+        };
 
         // Resolve OAuth token (Anthropic-specific: `claude login` flow).
         // Only check for OAuth token when the provider is actually Anthropic.
@@ -379,6 +387,26 @@ fn parse_extra_headers(val: &str) -> Result<Vec<(String, String)>, ConfigError>
     Ok(headers)
 }
 
+fn merge_extra_headers(
+    defaults: Vec<(String, String)>,
+    overrides: Vec<(String, String)>,
+) -> Vec<(String, String)> {
+    let mut merged = Vec::new();
+    let mut positions = std::collections::HashMap::<String, usize>::new();
+
+    for (key, value) in defaults.into_iter().chain(overrides) {
+        let normalized = key.to_ascii_lowercase();
+        if let Some(existing_index) = positions.get(&normalized).copied() {
+            merged[existing_index] = (key, value);
+        } else {
+            positions.insert(normalized, merged.len());
+            merged.push((key, value));
+        }
+    }
+
+    merged
+}
+
 /// Get the default session file path (~/.ironclaw/session.json).
 pub fn default_session_path() -> PathBuf {
     ironclaw_base_dir().join("session.json")
@@ -510,6 +538,29 @@ mod tests {
         );
     }
 
+    #[test]
+    fn merge_extra_headers_prefers_overrides_case_insensitively() {
+        let merged = merge_extra_headers(
+            vec![
+                ("User-Agent".to_string(), "default-agent".to_string()),
+                ("X-Test".to_string(), "default".to_string()),
+            ],
+            vec![
+                ("user-agent".to_string(), "override-agent".to_string()),
+                ("X-Extra".to_string(), "present".to_string()),
+            ],
+        );
+
+        assert_eq!(
+            merged,
+            vec![
+                ("user-agent".to_string(), "override-agent".to_string()),
+                ("X-Test".to_string(), "default".to_string()),
+                ("X-Extra".to_string(), "present".to_string()),
+            ]
+        );
+    }
+
     /// Clear all ollama-related env vars.
     fn clear_ollama_env() {
         // SAFETY: Only called under ENV_MUTEX in tests.
@@ -662,6 +713,54 @@ mod tests {
         assert_eq!(provider.protocol, ProviderProtocol::OpenAiCompletions);
     }
 
+    #[test]
+    fn registry_provider_resolves_github_copilot_alias() {
+        let _guard = ENV_MUTEX.lock().expect("env mutex poisoned");
+        // SAFETY: Under ENV_MUTEX.
+        unsafe {
+            std::env::set_var("LLM_BACKEND", "github-copilot");
+            std::env::set_var("GITHUB_COPILOT_TOKEN", "gho_test_token");
+            std::env::set_var(
+                "GITHUB_COPILOT_EXTRA_HEADERS",
+                "Copilot-Integration-Id:custom-chat,X-Test:enabled",
+            );
+        }
+
+        let settings = Settings::default();
+
+        let cfg = LlmConfig::resolve(&settings).expect("resolve should succeed");
+        assert_eq!(cfg.backend, "github_copilot");
+        let provider = cfg.provider.expect("provider config should be present");
+        assert_eq!(provider.provider_id, "github_copilot");
+        assert_eq!(provider.base_url, "https://api.githubcopilot.com");
+        assert_eq!(provider.model, "gpt-4o");
+        assert!(
+            provider
+                .extra_headers
+                .iter()
+                .any(|(key, value)| { key == "Copilot-Integration-Id" && value == "custom-chat" })
+        );
+        assert!(
+            provider
+                .extra_headers
+                .iter()
+                .any(|(key, value)| key == "User-Agent" && value == "GitHubCopilotChat/0.26.7")
+        );
+        assert!(
+            provider
+                .extra_headers
+                .iter()
+                .any(|(key, value)| key == "X-Test" && value == "enabled")
+        );
+
+        // SAFETY: Under ENV_MUTEX.
+        unsafe {
+            std::env::remove_var("LLM_BACKEND");
+            std::env::remove_var("GITHUB_COPILOT_TOKEN");
+            std::env::remove_var("GITHUB_COPILOT_EXTRA_HEADERS");
+        }
+    }
+
     #[test]
     fn nearai_backend_has_no_registry_provider() {
         let _guard = ENV_MUTEX.lock().expect("env mutex poisoned");

src/llm/CLAUDE.md

@@ -30,6 +30,7 @@ Set via `LLM_BACKEND` env var:
 | `nearai` (default) | NEAR AI Chat Completions | `NEARAI_SESSION_TOKEN` or `NEARAI_API_KEY` |
 | `openai` | OpenAI | `OPENAI_API_KEY` |
 | `anthropic` | Anthropic | `ANTHROPIC_API_KEY` |
+| `github_copilot` | GitHub Copilot Chat API | `GITHUB_COPILOT_TOKEN`, `GITHUB_COPILOT_MODEL` |
 | `ollama` | Ollama local | `OLLAMA_BASE_URL` |
 | `openai_compatible` | Any OpenAI-compatible endpoint | `LLM_BASE_URL`, `LLM_API_KEY`, `LLM_MODEL` |
 | `tinfoil` | Tinfoil TEE inference | `TINFOIL_API_KEY`, `TINFOIL_MODEL` |
@@ -46,6 +47,22 @@ Uses the native Converse API via `aws-sdk-bedrockruntime` (`bedrock.rs`). Requir
 - `BEDROCK_MODEL` — Required model ID (e.g., `anthropic.claude-opus-4-6-v1`)
 - `BEDROCK_CROSS_REGION` — Optional cross-region inference prefix (`us`, `eu`, `apac`, `global`)
 
+## GitHub Copilot Provider Notes
+
+`github_copilot` is a declarative registry provider backed by the existing
+OpenAI-compatible path. It defaults to `https://api.githubcopilot.com` and expects a
+GitHub Copilot OAuth token in `GITHUB_COPILOT_TOKEN` (for example the `oauth_token`
+stored by your IDE sign-in flow in `~/.config/github-copilot/apps.json`). The setup
+wizard also supports GitHub device login using the VS Code Copilot client ID and then
+stores the resulting token in the encrypted secrets store.
+
+Manual model entry is used in the setup wizard (`can_list_models = false`) because
+GitHub Copilot model discovery can require extra integration headers on some clients.
+IronClaw injects the standard VS Code identity headers automatically:
+`User-Agent`, `Editor-Version`, `Editor-Plugin-Version`, and
+`Copilot-Integration-Id`. Advanced users can still override or append headers via
+`GITHUB_COPILOT_EXTRA_HEADERS`.
+
 ## NEAR AI Provider Gotchas
 
 **Dual auth modes:**