Two issues prevented the GitHub Models fallback from working:
1. The X-GitHub-Api-Version: 2022-11-28 header caused '400 invalid
apiVersion' errors. The Copilot chat completions endpoint does not
use this header — removed from both constructor and rebuildClient.
2. The anthropicToGitHubModel mapping was incomplete: it only knew
three models and the generic date-stripping fallback produced wrong
names (e.g. 'claude-sonnet-4-5' instead of 'claude-sonnet-4.5').
GitHub Copilot uses dots for sub-versions, not hyphens.
Updated with explicit mappings for all current models (sonnet 4,
4.5; opus 4, 4.5, 4.6; haiku 4.5) and a smarter generic fallback
that converts digit-hyphen-digit to digit.digit at the end.
3. createClientFromConfig now auto-maps Anthropic-style model names
when the provider is 'github', so users can copy model names from
their Anthropic config into fallback blocks without manual renaming.
Five additive features with no breaking changes:
- Tool groups: group:fs, group:runtime, group:web, group:memory syntactic
sugar for allow/deny lists in tool policy config
- Typing indicators: Discord sendTyping() and WhatsApp sendStateTyping()
on message receipt for better UX feedback
- Session pruning: TTL-based auto-cleanup via sessions.ttl config with
hourly daemon timer and SQLite GROUP BY pruning
- /verbose command: TUI command parser toggle for raw streaming display
- !!think prefix: per-message extended thinking mode wired through
Anthropic (budget_tokens), OpenAI/GitHub (reasoning_effort), and
Gemini (thinkingConfig) providers
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
GitHubModelsClient now lazily resolves tokens at first API call. If no
token exists (env var, stored OAuth, or config), it triggers the OAuth
device flow automatically via an onLoginRequired callback wired in both
the TUI and daemon entry points.
Add a new 'github' model provider backed by the Copilot API
(api.githubcopilot.com), with OAuth device flow for authentication.
- New src/auth/github.ts: device flow login, token storage at
~/.config/flynn/auth.json with 0600 permissions
- New src/models/github.ts: OpenAI-compatible client with streaming,
tool calling, and Copilot-specific headers
- Add 'github' to provider enum in config schema
- Register provider in daemon factory and TUI client factory
- Refactor TUI to use provider-agnostic client factory (was hardcoded
to AnthropicClient for all tiers)
- Add /login command to TUI for interactive OAuth authorization
- Add Copilot model cost tracking entries
William Valentin