Milestone 3: command planning and exec handoff #3

New Issue

2026-05-26T19:16:09Z

KofTwentyTwo commented

2026-05-26 19:16:09 +00:00

(Migrated from github.com)

Goal

Implement the command selection and process handoff layer that turns a chosen host and session action into the final tmux or ssh -t ... tmux exec target.

Scope

Implement internal/exec command planning for local and remote attach/new-session flows per docs/DESIGN.md §8.2 and §9.3.
Use syscall.Exec for the final handoff, with an injectable boundary so tests can verify argv without replacing the test process.
Implement new-session name validation per §8.4.
Update state immediately before exec so lastAttached reflects the chosen host per §7.2.
Surface exec failures as limen: exec failed: <error> and exit 127.
Add unit tests for local attach, local new, remote attach, remote new, named session validation, state update timing, and exec failure formatting.

Out of scope

Bubble Tea or Lip Gloss.
Host/session picker rendering.
Automated tests that actually exec tmux or ssh.

Acceptance criteria

Command planning is deterministic and fully unit-tested.
Logic packages remain UI-agnostic.
go test -race ./... passes.
go vet ./... passes.
CI is green.

## Goal Implement the command selection and process handoff layer that turns a chosen host and session action into the final `tmux` or `ssh -t ... tmux` exec target. ## Scope - Implement `internal/exec` command planning for local and remote attach/new-session flows per `docs/DESIGN.md` §8.2 and §9.3. - Use `syscall.Exec` for the final handoff, with an injectable boundary so tests can verify argv without replacing the test process. - Implement new-session name validation per §8.4. - Update state immediately before exec so `lastAttached` reflects the chosen host per §7.2. - Surface exec failures as `limen: exec failed: <error>` and exit 127. - Add unit tests for local attach, local new, remote attach, remote new, named session validation, state update timing, and exec failure formatting. ## Out of scope - Bubble Tea or Lip Gloss. - Host/session picker rendering. - Automated tests that actually exec tmux or ssh. ## Acceptance criteria - Command planning is deterministic and fully unit-tested. - Logic packages remain UI-agnostic. - `go test -race ./...` passes. - `go vet ./...` passes. - CI is green.

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Reference: KofTwentyTwo/limen#3