## Summary
- Preserve request-scoped system variables such as files and user IDs
during Canvas execution.
- Persist conversation history, turn counts, and tool memory in the
session DSL across turns.
- Parse agent uploads into `sys.files` and align system variable
rendering with Python.
## Testing
- `bash build.sh --test ./internal/agent/...`
- `bash build.sh --test ./internal/service/...`
<img width="1896" height="1232" alt="image"
src="https://github.com/user-attachments/assets/b420cd97-53c3-470f-a3e1-d39cea26a213"
/>
### Summary
This PR fixes a Go backend bug where updating agent settings, such as
description, could clear the agent DSL.
Root cause:
PUT /api/v1/agents/:canvas_id only bound the dsl field in Go. When the
frontend submitted settings without dsl, the service still updated the
canvas with an empty DSL value.
Changes:
- Treat agent updates as partial patches.
- Preserve existing DSL when dsl is not present in the request.
- Update only specified user_canvas fields instead of saving the full
row.
- Add a regression test for settings updates preserving DSL.
Test:
`go test ./internal/service ./internal/handler`
Co-authored-by: Zhichang Yu <yuzhichang@gmail.com>
Replaces the Python agent canvas runtime with a Go implementation that
runs inside `cmd/server_main`.
The canvas compiles into an eino Workflow that pauses on wait-for-user
via native Interrupt/Resume (no sentinel flag) and resumes from a
Redis-backed CheckPointStore.
All 21 Python agent components and ~35 tools are ported with functional
parity.
Sandbox providers now read their JSON config from the admin-panel
system_settings table with env fallback.
234 files / +35,413 / -6,111. All Go files are gofmt-clean (CI gate
added); drops the v2 DSL E2E step and the gap-analysis plan (both
redundant after the port ships).
## Type of change
- [x] Refactoring
- [x] New feature
- [x] Bug fix
🤖 Generated with [Claude Code](https://claude.com/claude-code)
---------
Co-authored-by: Claude <noreply@anthropic.com>
