69 lines
2.5 KiB
Markdown
69 lines
2.5 KiB
Markdown
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<!-- Generated: 2026-07-12 | Files scanned: 124 | Token estimate: ~850 -->
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# Backend / Service Layer
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## AI Provider
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`src/service/provider.rs` (258 lines)
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- `LlmClient::new(api_key, model, base_url)` — constructs blocking reqwest client
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- `chat_with_tools()` — non-streaming with tool definitions
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- `chat_stream()` — SSE streaming, returns `SseParser` yielding `StreamEvent`
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- Retry logic: up to 3 attempts on transient errors, exponential backoff
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## OAuth
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`src/service/oauth/manager.rs` (113 lines) + `loopback.rs` + `pkce.rs`
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- PKCE flow: `CodeVerifier` → challenge → browser auth → loopback server → token exchange
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- Configurable via `app_config.json` provider definitions (auth URL, token URL, scopes)
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## IPC / Daemon
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`src/ipc/` (7 files, ~300 lines total)
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- Unix domain socket, length-prefixed JSON frames
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- Daemon sends `DaemonFrame { state: StatePayload, diff, tasks }` to clients
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- Clients send `ClientRequest { action: Action }` back
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- State sync uses snapshots + binary diffs (rsync-style, not git)
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## Workflow Engine
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`src/app/workflow/engine.rs` (251 lines) + `script.rs`
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- Inline JS-style DSL executed by a lightweight runtime
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- `agent()`, `parallel()`, `pipeline()`, `phase()`, `log()` — spawns sub-agents
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- Max concurrency configurable via `workflow_max_concurrency` setting
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## Sub-Agent System
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`src/app/subagent/` (4 files, ~250 lines)
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- `run_subagent()` — spawns independent agent with its own tool set & context
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- Communicates via `mpsc<SubagentEvent>` channel (tool calls, results, completion)
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- Uses `LlmClient` (same as main agent) with tool-use API
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## MCP Client
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`src/app/mcp/manager.rs` (371 lines)
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- Stdio transport: spawns child process, JSON-RPC via stdin/stdout
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- HTTP transport: streaming HTTP with JSON-RPC
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- Tool registration: `tools/list` → `McpToolAdapter` implements `crate::tool::Tool`
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- Persistent child handle for stdio (reuses connection across calls)
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## Self-Review
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`src/app/review/mod.rs` (437 lines)
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- Post-tool execution quality check against learned lessons
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- Invokes `run_subagent()` with reviewer prompt
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- Staleness detection: skips review after N consecutive empty results
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## Background Bash
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`src/app/bgbash/` (2 files)
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- `spawn_bash_job()` — runs `sh -c` in a thread, collects stdout line-by-line
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- Channels: output via `mpsc<String>`, PID via `mpsc<u32>`
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- Killable via PID
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## Gate Guard / Harness
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`src/app/harness.rs` (127 lines)
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- `Harness::gate_tool_call()` — verdict-based tool gating (allow/block)
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- Parses LLM verdicts (JSON or plain-text)
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- `test_parse_verdict_*` tests for 6 verdict formats
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