feat(desktop,core): Mac client agent loop — real runAgent in renderer#61
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Fixes the biggest v1-blocker hole: window.deepcode.agent.start() now
runs @deepcode/core's `runAgent` directly in the Tauri renderer. Users
can have a real conversation in DeepCode.app for the first time.
## Architecture
The Tauri webview can run runAgent because:
1. agent loop is IO-agnostic — just calls tool.execute(input, ctx)
2. We provide Mac-flavored ToolHandler implementations that route
fs/bash through Tauri commands → Rust executes them natively
3. DeepSeek's `openai` SDK ships browser-safe builds
## Rust (apps/desktop/src-tauri/src/)
· NEW tools.rs (~270 lines) — 6 commands: tool_read / tool_write /
tool_edit / tool_bash / tool_glob / tool_grep. Async tokio for
spawning + concurrent stdout/stderr capture + tokio::time::timeout
for command kill on timeout. Edit enforces uniqueness check (parity
with CLI's Edit tool).
· lib.rs — registers the 6 new commands.
## Renderer (apps/desktop/src/lib/)
· NEW mac-tools.ts — 6 ToolHandler wrappers. Each calls invoke()
instead of node:fs / node:child_process. Same interface as
@deepcode/core BUILTIN_TOOLS so the agent loop is unaware of the
swap.
· NEW mac-agent.ts — startAgentTurn() / abortAgentTurn() driver.
Owns the per-session history. Ensures provider via Tauri creds
read. Wraps a LocalToolRegistry (mirrors core's ToolRegistry shape
without dragging BUILTIN_TOOLS into the bundle).
· window-shim.ts — agent.start now invokes startAgentTurn; events
fan out through a listener bus to whoever called agent.onEvent.
## Renderer ↔ core wiring
· vite.config.ts — alias `@deepcode/core/dist/<path>` resolves to
compiled dist/, so the renderer cherry-picks { runAgent,
DeepSeekProvider, types } without dragging the whole index (which
re-exports node-fs-dependent modules).
· packages/core/package.json — added subpath exports for agent.js /
providers/deepseek.js / types.js.
· packages/core/src/agent.ts — buildSystemReminders changed to
runtime-variable dynamic import with @vite-ignore so rollup
doesn't bundle reminders/ (which imports node:fs via todo.ts).
Renderer passes systemReminders:false → branch never executes.
SessionManager import switched to type-only (was already type-
erased; comment for clarity).
## UI (apps/desktop/src/screens/Repl.tsx)
· Subscribes to agent.onEvent on mount; routes text_delta /
tool_use / tool_result / error events to the message list.
· Streaming assistant message gets a pulse caret while live.
· Stop button calls agent.abort on the active turnId.
Tests: 549 still passing. Builds: core ✓, desktop renderer (Vite) ✓
(318 KB JS / 90 KB gzipped — up from 165 KB because agent loop +
provider are now bundled).
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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Closes the biggest v1-blocker. Mac client can now have real DeepSeek conversations. Architecture: renderer runs @deepcode/core's runAgent; Mac tools route fs/bash through Tauri commands (6 new Rust commands). Bundle 318KB. 549 tests pass.