Wire /wt, MCP new_session, and loops to run sessions in-app on the project instance #268

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opened 2026-07-09 10:20:52 +02:00 by dries · 0 comments

dries commented

2026-07-09 10:20:52 +02:00

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#265 — One OpenCode per project: worktree sessions run in-app.

What to build

Wire all three session-creation callers through
EnsureProjectOpencode (#267) + directory-aware CreateSession (#266)
so worktree and same-directory sessions run in-app against the
project's single opencode instance. This is the first fully demoable
slice of #265.

/wt (local.Host.CreateWorktreeSession): create the git
worktree, call EnsureProjectOpencode(repoRoot), then create an in-app
session pointed at the worktree path against the returned port. Stop
calling LaunchWorktreeTmux.
MCP new_session (worktree) + loops spawn_worktree
(mcp.SessionLauncher.LaunchWithWorktree): replace
launchTmux(repoRoot, worktreePath) + waitForPort(worktreePath) with
the injected EnsureProjectOpencode(repoRoot), then Launch with
Directory = worktreePath.
MCP new_session (same directory) (SessionLauncher.Launch):
ensure the project instance before CreateSession, so same-dir splits
self-heal instead of returning ErrPlatformUnreachable.
Result shape: hostsvc.WorktreeSessionResult returns the created
session ID (plus worktree path, branch, reused flags). The
/api/worktree/create-and-launch response changes accordingly.
Frontend: /wt navigates to the created session in-app instead
of tmux switch-client. Worktrees view associates each worktree with
its sessions by the session's own directory (now distinct from the
process cwd), which ocman surfaces per session (folds in the original
attribution ticket).
Multi-remote: EnsureProjectOpencode runs on the owning host, same as
CreateWorktreeSession today.

Acceptance criteria

/wt creates a worktree session on the shared project instance —
no new opencode process, no per-worktree tmux window.
Second /wt for the same project reuses the same instance.
MCP worktree new_session and loops spawn_worktree reuse the
project instance.
Same-directory MCP new_session launches the instance if none is
running (no ErrPlatformUnreachable).
create-and-launch response carries the session ID; frontend
opens it in-app.
Worktrees view associates sessions by per-session directory.
Host + launcher + handler + frontend tests cover the new paths;
old per-worktree tmux launcher is no longer invoked.
make test && make lint green; coverage delta ≥ 0 both sides.

Blocked by

#266 — CreateSession sends the session directory.
#267 — EnsureProjectOpencode host primitive.

## Parent #265 — One OpenCode per project: worktree sessions run in-app. ## What to build Wire all three session-creation callers through `EnsureProjectOpencode` (#267) + directory-aware `CreateSession` (#266) so worktree and same-directory sessions run **in-app** against the project's single opencode instance. This is the first fully demoable slice of #265. - **`/wt`** (`local.Host.CreateWorktreeSession`): create the git worktree, call `EnsureProjectOpencode(repoRoot)`, then create an in-app session pointed at the worktree path against the returned port. Stop calling `LaunchWorktreeTmux`. - **MCP `new_session` (worktree) + loops `spawn_worktree`** (`mcp.SessionLauncher.LaunchWithWorktree`): replace `launchTmux(repoRoot, worktreePath)` + `waitForPort(worktreePath)` with the injected `EnsureProjectOpencode(repoRoot)`, then `Launch` with `Directory = worktreePath`. - **MCP `new_session` (same directory)** (`SessionLauncher.Launch`): ensure the project instance before `CreateSession`, so same-dir splits self-heal instead of returning `ErrPlatformUnreachable`. - **Result shape**: `hostsvc.WorktreeSessionResult` returns the created **session ID** (plus worktree path, branch, reused flags). The `/api/worktree/create-and-launch` response changes accordingly. - **Frontend**: `/wt` navigates to the created session **in-app** instead of `tmux switch-client`. Worktrees view associates each worktree with its sessions by the **session's own `directory`** (now distinct from the process cwd), which ocman surfaces per session (folds in the original attribution ticket). - Multi-remote: `EnsureProjectOpencode` runs on the owning host, same as `CreateWorktreeSession` today. ## Acceptance criteria - [ ] `/wt` creates a worktree session on the shared project instance — no new opencode process, no per-worktree tmux window. - [ ] Second `/wt` for the same project reuses the same instance. - [ ] MCP worktree `new_session` and loops `spawn_worktree` reuse the project instance. - [ ] Same-directory MCP `new_session` launches the instance if none is running (no `ErrPlatformUnreachable`). - [ ] `create-and-launch` response carries the session ID; frontend opens it in-app. - [ ] Worktrees view associates sessions by per-session directory. - [ ] Host + launcher + handler + frontend tests cover the new paths; old per-worktree tmux launcher is no longer invoked. - [ ] `make test && make lint` green; coverage delta ≥ 0 both sides. ## Blocked by - #266 — CreateSession sends the session directory. - #267 — EnsureProjectOpencode host primitive.